WorldWideScience

Sample records for initial metallurgical state

  1. Renormalizing an initial state

    CERN Document Server

    Collins, Hael; Vardanyan, Tereza

    2014-01-01

    The intricate machinery of perturbative quantum field theory has largely been devoted to the 'dynamical' side of the theory: simple states are evolved in complicated ways. This article begins to address this lopsided treatment. Although it is rarely possible to solve for the eigenstates of an interacting theory exactly, a general state and its evolution can nonetheless be constructed perturbatively in terms of the propagators and structures defined with respect to the free theory. The detailed form of the initial state in this picture is fixed by imposing suitable `renormalization conditions' on the Green's functions. This technique is illustrated with an example drawn from inflation, where the presence of nonrenormalizable operators and where an expansion that naturally couples early times with short distances make the ability to start the theory at a finite initial time especially desirable.

  2. Metallurgical Research Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The purpose is to increase basic knowledge of metallurgical processing for controlling the microstructure and mechanical properties of metallic aerospace alloys and...

  3. Metallurgical Research Laboratory

    Data.gov (United States)

    Federal Laboratory Consortium — The purpose is to increase basic knowledge of metallurgical processing for controlling the microstructure and mechanical properties of metallic aerospace alloys and...

  4. Metallurgical process engineering

    Energy Technology Data Exchange (ETDEWEB)

    Yin, Ruiyu [Central Iron and Steel Research Institute (CISRI), Beijing (China)

    2011-07-01

    ''Metallurgical Process Engineering'' discusses large-scale integrated theory on the level of manufacturing production processes, putting forward concepts for exploring non-equilibrium and irreversible complex system. It emphasizes the dynamic and orderly operation of the steel plant manufacturing process, the major elements of which are the flow, process network and program. The book aims at establishing a quasi-continuous and continuous process system for improving several techno-economic indices, minimizing dissipation and enhancing the market competitiveness and sustainability of steel plants. The book is intended for engineers, researchers and managers in the fields of metallurgical engineering, industrial design, and process engineering. (orig.)

  5. Antenna Showers with Hadronic Initial States

    CERN Document Server

    Ritzmann, M; Skands, P

    2013-01-01

    We present an antenna shower formalism including contributions from initial-state partons and corresponding backwards evolution. We give a set of phase-space maps and antenna functions for massless partons which define a complete shower formalism suitable for computing observables with hadronic initial states. We focus on the initial-state components: initial-initial and initial-final antenna configurations. The formalism includes comprehensive possibilities for uncertainty estimates. We report on some preliminary results obtained with an implementation in the Vincia antenna-shower framework.

  6. On the Initial State and Consistency Relations

    CERN Document Server

    Berezhiani, Lasha

    2014-01-01

    We study the effect of the initial state on the consistency conditions for adiabatic perturbations. In order to be consistent with the constraints of General Relativity, the initial state must be diffeomorphism invariant. As a result, we show that initial wavefunctional/density matrix has to satisfy a Slavnov-Taylor identity similar to that of the action. We then investigate the precise ways in which modified initial states can lead to violations of the consistency relations. We find two independent sources of violations: i) the state can include initial non-Gaussianities; ii) even if the initial state is Gaussian, such as a Bogoliubov state, the modified 2-point function can modify the q->0 analyticity properties of the vertex functional and result in violations of the consistency relations.

  7. On the initial state and consistency relations

    Energy Technology Data Exchange (ETDEWEB)

    Berezhiani, Lasha; Khoury, Justin, E-mail: lashaber@sas.upenn.edu, E-mail: jkhoury@sas.upenn.edu [Center for Particle Cosmology, Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104 (United States)

    2014-09-01

    We study the effect of the initial state on the consistency conditions for adiabatic perturbations. In order to be consistent with the constraints of General Relativity, the initial state must be diffeomorphism invariant. As a result, we show that initial wavefunctional/density matrix has to satisfy a Slavnov-Taylor identity similar to that of the action. We then investigate the precise ways in which modified initial states can lead to violations of the consistency relations. We find two independent sources of violations: i) the state can include initial non-Gaussianities; ii) even if the initial state is Gaussian, such as a Bogoliubov state, the modified 2-point function can modify the q-vector → 0 analyticity properties of the vertex functional and result in violations of the consistency relations.

  8. Foundations for quantitative microstructural models to track evolution of the metallurgical state during high purity Nb cavity fabrication

    Energy Technology Data Exchange (ETDEWEB)

    Bieler, Thomas R [Michigan State University; Wright, Neil T [Michigan State University; Compton, Chris C [Facility for Rare Isotope Beams

    2014-03-15

    The goal of the Materials Science SRF Cavity Group of Michigan State University and the National Superconducting Cyclotron has been (and continues to be) to understand quantitatively the effects of process history on functional properties. These relationships were assessed via studies on Nb samples and cavity parts, which had various combinations of forming processes, welding, heat treatments, and surface preparation. A primary focus was on large-grain cavity building strategies. Effects of processing operations and exposure to hydrogen on the thermal conductivity has been identified in single and bi-crystal samples, showing that the thermal conductivity can be altered by a factor of 5 depending on process history. Characterization of single crystal tensile samples show a strong effect of crystal orientation on deformation resistance and shape changes. Large grain half cells were examined to characterize defect content and surface damage effects, which provided quantitative information about the depth damage layers from forming.

  9. The dimensioning of performance in metallurgical industry from Romania

    Directory of Open Access Journals (Sweden)

    G. Dobrotă

    2015-07-01

    Full Text Available The paper shows the importance of using the indicators for the analysis the financial performance, corresponding with the particularities determined by branch, object of activity or size. Also, our paper aims to identify the state of financial performance in metallurgical industry, taking into account the data recorded at the level of some enterprises in the metallurgical sector in Romania for the period 2009 - 2013 as well as the level of entire branches.

  10. Crisis management in metallurgical enterprises

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2014-07-01

    Full Text Available On the basis of report analysis which presents situation in metallurgical sector after 2008 the range of changes implemented in management of metallurgical enterprises was characterised. A definition approach to crisis management was suggested as the process when the enterprise is managed during the breakdown period in market condition of the economy in the way directed towards preventing the negative effects of crisis inside enterprises. The publication presents the key aspects of enterprise management in the period of collapse of the balance between the supply and demand on the metallurgical market.

  11. The ecological value of metallurgical enterprise after privatization and restructuring

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2012-01-01

    Full Text Available The aim of the article was the presentation of the ecological eff ects achieved in the metallurgical company in Poland after privatization and overall, thorough restructuring. For the need to conduct privatization of the state-owned enterprises and their restricting resulted from the transformation of the national economy. The market system forced the introduction of the changes in the functioning of all the enterprises, among them also the metallurgical enterprises. On the basis of the metallurgical company Ferrum SA (joint-stock company, the producer of the pipes, the road of the company towards the competitiveness is presented. The bases for the comparisons were various ecological aspects. Data from the environment reports of the metallurgical company Ferrum SA were used in order to conduct the analysis.

  12. Computer Applications in Metallurgical Research

    Directory of Open Access Journals (Sweden)

    V. Madhu

    1994-04-01

    Full Text Available This paper outlines the current efforts in computer applications in metallurgical research at the Defence Metallurgical Research Laboratory, Hyderabad. Work being done on armour penetration studies, optimization of armour profiles for fighting vehicles, computer control of multifunction 2000 tonne forge press, drawing of processing mechanism maps, process modelling of titanium sponge production and methods of curve fitting to experimental data, is described and briefly discussed.

  13. Final Report: Multi-State Sharing Initiative

    Energy Technology Data Exchange (ETDEWEB)

    Begoli, Edmon [ORNL; Boehmann, Brant [ORNL; DeNap, Frank A [ORNL

    2012-04-01

    In 2003 a joint effort between the U.S. Department of Homeland Security (DHS) and the U.S. Department of Justice created state and metropolitan intelligence fusion centers. These fusion centers were an effort to share law enforcement, disaster, and terrorism related information and intelligence between state and local jurisdictions and to share terrorism related intelligence between state and local law enforcement agencies and various federal entities. In 2006, DHS commissioned the Oak Ridge National Laboratory to establish and manage a groundbreaking program to assist local, state, and tribal leaders in developing the tools and methods required to anticipate and forestall terrorist events and to enhance disaster response. This program, called the Southeast Region Research Initiative (SERRI), combines science and technology with validated operational approaches to address regionally unique requirements and suggest regional solutions with the potential for national application. In 2009, SERRI sponsored the Multistate Sharing Initiative (MSSI) to assist state and metropolitan intelligence fusion centers with sharing information related to a wider variety of state interests than just terrorism. While these fusion centers have been effective at sharing data across organizations within their respective jurisdictions, their organizational structure makes bilateral communication with federal entities convenient and also allows information to be further disbursed to other local entities when appropriate. The MSSI-developed Suspicious Activity Report (SAR) sharing system allows state-to-state sharing of non-terrorism-related law enforcement and disaster information. Currently, the MSSI SAR system is deployed in Alabama, Kentucky, Tennessee, and South Carolina. About 1 year after implementation, cognizant fusion center personnel from each state were contacted to ascertain the status of their MSSI SAR systems. The overwhelming response from these individuals was that the MSSI

  14. Finite element analysis of metallurgical phase transformations in AA 6056-T4 and their effects upon the residual stress and distortion states of a laser welded T-joint

    Energy Technology Data Exchange (ETDEWEB)

    Zain-ul-abdein, Muhammad [Universite de Lyon, CNRS, INSA-Lyon, LaMCoS UMR5259, F-69621 (France); Nelias, Daniel, E-mail: daniel.nelias@insa-lyon.f [Universite de Lyon, CNRS, INSA-Lyon, LaMCoS UMR5259, F-69621 (France); Jullien, Jean-Francois [Universite de Lyon, CNRS, INSA-Lyon, LaMCoS UMR5259, F-69621 (France); Boitout, Frederic; Dischert, Luc; Noe, Xavier [ESI Group Le Recamier 70, rue Robert 69458 Lyon Cedex 06 (France)

    2011-01-15

    Aircraft industry makes extensive use of aluminium alloy AA 6056-T4 in the fabrication of fuselage panels using laser beam welding technique. Since high temperatures are involved in the manufacturing process, the precipitation/dissolution occurrences are expected as solid state phase transformations. These transformations are likely to affect the residual distortion and stress states of the component. The present work investigates the effect of metallurgical phase transformations upon the residual stresses and distortions induced by laser beam welding in a T-joint configuration using the finite element method. Two separate models were studied using different finite element codes, where the first one describes a thermo-mechanical analysis using Abaqus; while the second one discusses a thermo-metallo-mechanical analysis using Sysweld. A comparative analysis of experimentally validated finite element models has been performed and the residual stress states with and without the metallurgical phase transformations are predicted. The results show that the inclusion of phase transformations has a negligible effect on predicted distortions, which are in agreement with the experimental data, but an effect on predicted residual stresses, although the experimentally measured residual stresses are not available to support the analyses.

  15. Safety performance indicators in the metallurgical industry using WEB programming

    Directory of Open Access Journals (Sweden)

    M. Cioca

    2017-01-01

    Full Text Available Sustainable development has a significant impact today in Romania and worldwide. In this context, risk assessment becomes mandatory for enterprises. This paper analyzes the situation of occupational risks in the metallurgical industry in the European Union, Romania, and the United States and highlights the main causes for work accidents in Romanian metallurgical industry. The analysis covers the period 2010 - 2016. The data collected from Romania is compared to the data related to the European Union and the United States. Moreover, the paper aims to present an occupational risk assessment tool, which is customizable for each area of activity. The last section of the paper discusses the research results and limitations.

  16. Cosmological Consequences of Initial State Entanglement

    CERN Document Server

    Albrecht, Andreas; Holman, R

    2014-01-01

    We explore the cosmological consequences of having the fluctuations of the inflaton field entangled with those of another scalar, within the context of a toy model consisting of non-interacting, minimally coupled scalars in a fixed de Sitter background. We find that despite the lack of interactions in the Lagrangian, the initial state entanglement modifies the mode equation for the inflaton fluctuations and thus can induce changes in cosmological observables. These effects are examined for a variety of choices of masses and we find that they can be consistent with the requirement that the back reaction of the modified state not affect the inflationary phase while still giving rise to observable effects in the power spectrum. Our results suggest that more realistic extensions of the ideas explored here beyond the simple toy model may lead to interesting observable effects.

  17. An analytic initial-state parton shower

    Energy Technology Data Exchange (ETDEWEB)

    Kilian, W. [Siegen Univ. (Germany). Dept. Physik; Reuter, J.; Schmidt, S.; Wiesler, D. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2011-12-15

    We present a new algorithm for an analytic parton shower. While the algorithm for the final-state shower has been known in the literature, the construction of an initial-state shower along these lines is new. The aim is to have a parton shower algorithm for which the full analytic form of the probability distribution for all branchings is known. For these parton shower algorithms it is therefore possible to calculate the probability for a given event to be generated, providing the potential to reweight the event after the simulation. We develop the algorithm for this shower including scale choices and angular ordering. Merging to matrix elements is used to describe high-energy tails of distributions correctly. Finally, we compare our results with those of other parton showers and with experimental data from LEP, Tevatron and LHC. (orig.)

  18. Cermet crucible for metallurgical processing

    Science.gov (United States)

    Boring, Christopher P.

    1995-01-01

    A cermet crucible for metallurgically processing metals having high melting points comprising a body consisting essentially of a mixture of calcium oxide and erbium metal, the mixture comprising calcium oxide in a range between about 50 and 90% by weight and erbium metal in a range between about 10 and 50% by weight.

  19. Initial state radiation experiment at MAMI

    Directory of Open Access Journals (Sweden)

    Mihovilovič M.

    2014-05-01

    Full Text Available In an attempt to contribute further insight into the discrepancy between the Lamb shift and elastic scattering determinations of the proton charge radius, a new experiment at MAMI is underway, aimed at measuring proton form-factors at very low momentum transfers by using a new technique based on initial state radiation. This paper reports on the conclusions of the pilot measurement performed in 2010, whose main goal was to check the feasibility of the proposed experiment and to recognize and overcome any obstacles before running the full experiment. The modifications to the experimental apparatus are then explained which significantly improved the quality of data collected in the full scale experiment, which was successfully executed in August 2013. At the end first findings of the new experiment are discussed.

  20. Hemispherical anomaly from asymmetric initial states

    Science.gov (United States)

    Ashoorioon, Amjad; Koivisto, Tomi

    2016-08-01

    We investigate if the hemispherical asymmetry in the CMB is produced from "asymmetric" excited initial conditions. We show that in the limit where the deviations from the Bunch-Davies vacuum are large and the scale of new physics is maximally separated from the inflationary Hubble parameter, the primordial power spectrum is modulated only by position-dependent dipole and quadrupole terms. Requiring the dipole contribution in the power spectrum to account for the observed power asymmetry, A =0.07 ±0.022 , we show that the amount of quadrupole terms is roughly equal to A2. The mean local bispectrum, which gets enhanced for the excited initial state, is within the 1 σ bound of Planck 2015 results for a large field model, fNL≃4.17 , but is reachable by future CMB experiments. The amplitude of the local non-Gaussianity modulates around this mean value, depending on the angle that the correlated patches on the 2d CMB surface make with the preferred direction. The amount of variation is minimized for the configuration in which the short and long wavelength modes are around the preferred pole and |k→3|≈|k→l ≈10|≪|k→1|≈|k→2|≈|k→l ≈2500| with fNLmin≈3.64 . The maximum occurs when these modes are at the antipode of the preferred pole, fNLmax≈4.81 . The difference of non-Gaussianity between these two configurations is as large as ≃1.17 , which can be used to distinguish this scenario from other scenarios that try to explain the observed hemispherical asymmetry.

  1. Simulation model of metallurgical production management

    Directory of Open Access Journals (Sweden)

    P. Šnapka

    2013-07-01

    Full Text Available This article is focused to the problems of the metallurgical production process intensification. The aim is the explaining of simulation model which presents metallurgical production management system adequated to new requirements. The knowledge of a dynamic behavior and features of metallurgical production system and its management are needed to this model creation. Characteristics which determine the dynamics of metallurgical production process are characterized. Simulation model is structured as functional blocks and their linkages with regard to organizational and temporal hierarchy of their actions. The creation of presented simulation model is based on theoretical findings of regulation, hierarchical systems and optimization.

  2. Cleaner metallurgical industry in Serbia: a road to the sustainable development

    Directory of Open Access Journals (Sweden)

    D. Panias

    2009-01-01

    Full Text Available Since the sustainable development has been a global and fundamental objecttive, a metallurgical industrial sector faces some of the most difficult sustainability challenges of any industrial sector. On the other hand, the metallurgical production in Serbia is a very important part of the economy. Due to present facilities and technologies, metallurgical companies face a great challenge to fulfill the requirements introduced by legislature referring to the cleaner production and sustainable development. The state of art in the production, facilities, pollution with some answers to imposed challenges is presented.

  3. What is the shape of the initial state?

    CERN Document Server

    Agarwal, Nishant; Tolley, Andrew J

    2013-01-01

    We argue that a plausible operational definition for an initial state of the Universe is the initial quantum state of the curvature perturbations generated during inflation. We provide a parameterization of this state and generalize the standard in-in formalism to incorporate the structures in this state into the computation of correlators of the perturbations. Measurements of these correlators using both the CMB as well as large scale structure probe different structures in the initial state, as they give rise to bi- and tri-spectra peaked on different shapes of triangles and quadrilaterals in momentum space. In essence, the shapes implied by the correlators feed directly into information about the shape of the initial state and what physics could have preceded inflation to set this state up.

  4. Modeling and Simulation of Metallurgical Process Based on Hybrid Petri Net

    Science.gov (United States)

    Ren, Yujuan; Bao, Hong

    2016-11-01

    In order to achieve the goals of energy saving and emission reduction of iron and steel enterprises, an increasing number of modeling and simulation technologies are used to research and analyse metallurgical production process. In this paper, the basic principle of Hybrid Petri net is used to model and analyse the Metallurgical Process. Firstly, the definition of Hybrid Petri Net System of Metallurgical Process (MPHPNS) and its modeling theory are proposed. Secondly, the model of MPHPNS based on material flow is constructed. The dynamic flow of materials and the real-time change of each technological state in metallurgical process are simulated vividly by using this model. The simulation process can implement interaction between the continuous event dynamic system and the discrete event dynamic system at the same level, and play a positive role in the production decision.

  5. On the influence of initial state on gyrokinetic simulations

    OpenAIRE

    Dif-Pradalier, Guilhem; Grandgirard, P; Sarazin, P; Garbet, P; Ghendrih, Philippe; Angelino, P

    2008-01-01

    International audience; The influence of the initial state on the turbulence and transport is addressed in collisionless, global, and full-f gyrokinetic simulations solving both the equilibrium and the fluctuations. For two strongly differing initial states, it is found that the steady turbulent regime exhibits nearly identical statistical properties. This result is in marked contrast with the claim of different final states. In fact, a long transient with very different properties finally ev...

  6. Metallurgical recovery of metals from electronic waste: a review.

    Science.gov (United States)

    Cui, Jirang; Zhang, Lifeng

    2008-10-30

    Waste electric and electronic equipment, or electronic waste, has been taken into consideration not only by the government but also by the public due to their hazardous material contents. In the detailed literature survey, value distributions for different electronic waste samples were calculated. It is showed that the major economic driver for recycling of electronic waste is from the recovery of precious metals. The state of the art in recovery of precious metals from electronic waste by pyrometallurgical processing, hydrometallurgical processing, and biometallurgical processing are highlighted in the paper. Pyrometallurgical processing has been a traditional technology for recovery of precious metals from waste electronic equipment. However, state-of-the-art smelters are highly depended on investments. Recent research on recovery of energy from PC waste gives an example for using plastics in this waste stream. It indicates that thermal processing provides a feasible approach for recovery of energy from electronic waste if a comprehensive emission control system is installed. In the last decade, attentions have been removed from pyrometallurgical process to hydrometallurgical process for recovery of metals from electronic waste. In the paper, hydrometallurgical processing techniques including cyanide leaching, halide leaching, thiourea leaching, and thiosulfate leaching of precious metals are detailed. In order to develop an environmentally friendly technique for recovery of precious metals from electronic scrap, a critical comparison of main leaching methods is analyzed for both economic feasibility and environmental impact. It is believed that biotechnology has been one of the most promising technologies in metallurgical processing. Bioleaching has been used for recovery of precious metals and copper from ores for many years. However, limited research was carried out on the bioleaching of metals from electronic waste. In the review, initial researches on the

  7. Leaching kinetics in cyanide media of Ag contained in the industrial mining-metallurgical wastes in the state of Hidalgo, Mexico

    Institute of Scientific and Technical Information of China (English)

    Juan Hernandez⇑; Francisco Patino; Isauro Rivera; Iván Alejandro Reyes; Misrael Uriel Flores; Julio Cesar Juarez; Martín Reyes

    2014-01-01

    The leaching kinetics in cyanide media of the silver contained in the Dos Carlos waste tailings at the City of Pachuca de Soto, Hidalgo State, Mexico were carried out. The used material contained the following chemical composition: 56 ? 10-6 of Ag, 0.6 ? 10?6 of Au and 70.43% (by weight) of SiO2; 7.032% (by weight) of Al2O3; 2.69% (by weight) of Fe; 0.46% (by weight) of Mn; 3.98% (by weight) of K2O; 3.34%(by weight) of CaO;2.50% (by weight) of Na2O;0.04% (by weight) of Zn;0.026%(by weight) of Pb. The mineralogical phases present were the following:Silica, albite, argentite, berlinite, orthoclase, potassium jarosite, and natrojarosite. In the leaching kinetics in cyanide media, and under the studied conditions, the effect of the CN? concentration on the reaction rate has no effect on the whole process of alkaline cyanidation, of which the reaction order is n ? 0. Temperature has an effect on the cyanidation rate of the reaction, with an activation energy of 47.9 KJ/mol. At the same time, when the particle size decreases there is an increase in the reaction rate, which is inversely proportional to the particle diameter;when increasing the NaOH concentration there is an increase in the reaction rate Kexp, with a reaction order (n) of 0.215 under the studied ranges.

  8. State Initiatives To Increase Compensation for Child Care Workers.

    Science.gov (United States)

    Twombly, Eric C.; Montilla, Maria D.; De Vita, Carol J.

    Noting that wages for child care workers are among the lowest in the U.S. labor force and that generally caregivers are offered few employee benefits, this paper summarizes proposals and programs in the 50 states and the District of Columbia to raise child care worker compensation. The paper classifies state-level initiatives into two categories:…

  9. State Policy Initiatives for Financing Energy Efficiency in Public Buildings.

    Science.gov (United States)

    Business Officer, 1984

    1984-01-01

    Alternative financing methods (other than state financing) for developing cost-effective energy efficiency projects are discussed. It is suggested that by properly financing energy efficiency investments, state campuses can generate immediate positive cash savings. The following eight initiatives for maximizing energy savings potential are…

  10. Plasma metallurgical production of nanocrystalline borides and carbides

    Science.gov (United States)

    Galevsky, G. V.; Rudneva, V. V.; Cherepanov, A. N.; Galevsky, S. G.; Efimova, K. A.

    2016-09-01

    he experience in production and study of properties of nanocrystalline borides and chromium carbides, titanium, silicon was summarized. The design and features of the vertical three-jet once-through reactor with power 150 kW, used in the plasma metallurgical production, was described. The technological, thermotechnical and resource characteristics of the reactor were identified. The parameters of borides and carbides synthesis, their main characteristics in the nanodispersed state and equipment-technological scheme of production were provided. Evaluation of engineering-and-economical performance of the laboratory and industrial levels of borides and carbides production and the state corresponding to the segment of the world market was carried out.

  11. Initial state dependence of a quantum-resonance ratchet

    CERN Document Server

    Ni, Jiating; Dadras, Siamak; Borunda, Mario F; Wimberger, Sandro; Summy, Gil S

    2016-01-01

    We demonstrate quantum resonance ratchets created with Bose-Einstein condensates exposed to pulses of an off-resonant standing light wave. We show how some of the basic properties of the ratchets are controllable through the creation of different initial states of the system. In particular, our results prove that through an appropriate choice of initial state it is possible to reduce the extent to which the ratchet state changes with respect to time. We develop a simple theory to explain our results and indicate how ratchets might be used as part of a matter wave interferometer or quantum-random walk experiment.

  12. Hindcasting to measure ice sheet model sensitivity to initial states

    Directory of Open Access Journals (Sweden)

    A. Aschwanden

    2012-12-01

    Full Text Available Recent observations of the Greenland ice sheet indicate rapid mass loss at an accelerating rate with an increasing contribution to global mean sea level. Ice sheet models are used for projections of such future contributions of ice sheets to sea level, but the quality of projections is difficult to measure directly. Realistic initial states are crucial for accurate simulations. To test initial states we use hindcasting, i.e. forcing a model with known or closely-estimated inputs for past events to see how well the output matches observations. By simulating the recent past of Greenland, and comparing to observations of ice thickness, ice discharge, surface speeds, mass loss and surface elevation changes for validation, we find that the short term model response is strongly influenced by the initial state. We show that the dynamical state can be mis-represented despite a good agreement with some observations, stressing the importance of using multiple observations. Some initial states generate good agreement with measured mass time series in the hindcast period, and good agreement with present-day kinematic fields. We suggest hindcasting as a methodology for careful validation of initial states that can be done before making projections on decadal to century time-scales.

  13. Influence of initial state distortion in ion-atom collisions

    Energy Technology Data Exchange (ETDEWEB)

    Ciappina, M F [CONICET and Departamento de FIsica, Universidad Nacional del Sur, 8000 BahIa Blanca (Argentina); Cravero, W R [CONICET and Departamento de FIsica, Universidad Nacional del Sur, 8000 BahIa Blanca (Argentina); Garibotti, C R [CONICET and Division Colisiones Atomicas, Centro Atomico Bariloche, 8400 Bariloche (Argentina)

    2004-05-28

    We have studied the influence of initial state distortion in a single ionization by ion impact. We have taken a continuum distorted wave type distortion and by taking up to the first order in its asymptotic series expansion we build an eikonal-spherical distortion. In this way the influence of each term in the transition amplitude can be stated. This approximation can be considered an intermediate one between the eikonal initial state and the continuum distorted wave approaches for initial state distortion. We have computed doubly differential cross sections for helium ionization by protons and highly charged ions at high and intermediate impact energy. We have also discussed the contribution of the different terms in electron energy spectra, specially in the vicinity of ECC peak. Very good agreement is found with the available experimental data.

  14. Diagnosis of employee engagement in metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2013-01-01

    Full Text Available In the theoretical part of the publication an overview of the definitions of employee engagement was conducted together with the analysis of the methods and techniques which influence the professional activity of the employees in the metallurgical enterprise. The practical part discusses the results of diagnosis of engagement in steelworks. Presented theories, as well as the research, fill the information gap concerning the engagement of the employees in metallurgical enterprises. This notion is important due to the fact that modern conditions of human resources management require the engagement of the employees as something commonly accepted and a designation of manufacturing enterprises.

  15. Cast iron component failure: A metallurgical investigation

    Directory of Open Access Journals (Sweden)

    K.V. Sudhakar

    2012-12-01

    Full Text Available A fractured nutcracker was examined for determining the root cause/s for premature fracture/failure. This is one of the common tools usedtypically for cracking hard nuts. In this study, metallurgical failure analysis techniques namely, visual inspection, optical microscopy, SEM, and hardness tests were used in investigating the broken product. From the metallurgical analysis, it was determined that the combined effect of low carbon equivalent and presence of inclusions contributed to the sudden fracture of the nut cracking tool.

  16. 3-D Glasma initial state for relativistic heavy ion collisions

    CERN Document Server

    Schenke, Bjoern

    2016-01-01

    We extend the impact parameter dependent Glasma model (IP-Glasma) to three dimensions using explicit small x evolution of the two incoming nuclear gluon distributions. We compute rapidity distributions of produced gluons and the early time energy momentum tensor as a function of space-time rapidity and transverse coordinates. We study rapidity correlations and fluctuations of the initial geometry and multiplicity distributions and compare to existing models for the three dimensional initial state.

  17. Factorization at the LHC: From PDFs to Initial State Jets

    CERN Document Server

    Stewart, Iain W; Waalewijn, Wouter J

    2009-01-01

    We study proton-(anti)proton collisions at the LHC or Tevatron in the presence of experimental restrictions on the hadronic final state and for generic parton momentum fractions. At the scale Q of the hard interaction, factorization does not yield standard parton distribution functions (PDFs) for the initial state. The measurement restricting the hadronic final state introduces a new scale \\mu_B Xl+l- where X is restricted to have no central jets. We comment on the extension to cases where the hadronic final state contains a certain number of isolated central jets.

  18. Highlights from PHENIX-I: initial state and early times

    Energy Technology Data Exchange (ETDEWEB)

    Leitch, Michael J [Los Alamos National Laboratory

    2009-01-01

    We will review the latest physics developments from PHENIX concentrating on cold nuclear matter effects, the initial state for heavy-ion collisions, and probes of the earliest stages of the hot-dense medium created in those collisions. Recent physics results from p + p and d + Au collisions; and from direct photons, quarkonia and low-mass vector mesons in A+A collisions will be highlighted. Insights from these measurements into the characteristics of the initial state and about the earliest times in heavy-ion collisions will be discussed.

  19. Enhanced Inflationary Trispectrum from a Non-Vacuum Initial State

    Science.gov (United States)

    Agullo, I.; Navarro-Salas, J.; Parker, L.

    2015-01-01

    We work out the primordial inflationary trispectrum for curvature perturbations in models with standard kinetic terms, when the initial quantum state is not necessarily the Bunch-Davies vacuum state. The presence of initial perturbations enhances the trispectrum amplitude for squeezed configurations, in parallel to the bispectrum enhancement. For those squeezed configurations the trispectrum acquires the so-called local form, with a scale dependent amplitude that can get values larger than the prediction of the so-called Maldacena consistency relation. The enhancement factor could be as large as 106, and could reach the sensitivity of forthcoming observations, even for single-field inflationary models.

  20. On the influence of initial state on gyrokinetic simulations

    Science.gov (United States)

    Dif-Pradalier, G.; Grandgirard, V.; Sarazin, Y.; Garbet, X.; Ghendrih, Ph.; Angelino, P.

    2008-04-01

    The influence of the initial state on the turbulence and transport is addressed in collisionless, global, and full-f gyrokinetic simulations solving both the equilibrium and the fluctuations. For two strongly differing initial states, it is found that the steady turbulent regime exhibits nearly identical statistical properties. This result is in marked contrast with the claim of different final states. In fact, a long transient with very different properties finally evolves towards the same turbulent regime for long simulation times. When the initial state is a local Maxwellian, i.e., constant on flux surfaces, a large-scale sheared electric potential develops on short time scales to compensate for the vertical curvature and grad-B drifts. We predict analytically (i) the temporal dynamics at short times of this electric potential, (ii) its poloidal structure, and (iii) its saturation time. All agree well with numerical simulations using the GYSELA code. The impact on the transport is twofold, as compared to the canonical initial state, where f only depends on the motion invariants: (i) the turbulence is delayed due to a weaker effective growth rate, (ii) the same transport level is obtained at long times and the turbulence exhibits nearly identical statistical characteristics. In agreement, the electric potential of these two cases has the same magnitude despite very different transients.

  1. Friction welding thermal and metallurgical characteristics

    CERN Document Server

    Yilbas, Bekir Sami

    2014-01-01

    This book provides insight into the thermal analysis of friction welding incorporating welding parameters such as external, duration, breaking load, and material properties. The morphological and metallurgical changes associated with the resulting weld sites are analysed using characterization methods such as electron scanning microscope, energy dispersive spectroscopy, X-ray Diffraction, and Nuclear reaction analysis.

  2. Observability at an initial state for polynomial systems

    NARCIS (Netherlands)

    Kawano, Yu; Ohtsuka, Toshiyuki

    2013-01-01

    We consider observability at an initial state for polynomial systems. When testing for local observability for nonlinear systems, the observability rank condition based on the inverse function theorem is commonly used. However, the rank condition is a sufficient condition, and we cannot test for glo

  3. Washington State Student Achievement Initiative Policy Study: Final Report

    Science.gov (United States)

    Jenkins, Davis; Wachen, John; Moore, Colleen; Shulock, Nancy

    2012-01-01

    In 2007, the Washington State Board for Community and Technical Colleges launched a performance funding policy called the Student Achievement Initiative (SAI) both to improve public accountability by more accurately describing what students achieve from enrolling in community colleges and to provide incentives to colleges through financial rewards…

  4. Initial state fluctuations in collisions between light and heavy ions

    CERN Document Server

    Welsh, Kevin; Heinz, Ulrich W

    2016-01-01

    In high energy collisions involving small nuclei (p+p or x+Au collisions where x=p, d, or $^3$He) the fluctuating size, shape and internal gluonic structure of the nucleon is shown to have a strong effect on the initial size and shape of the fireball of new matter created in the collision. A systematic study of the eccentricity coefficients describing this initial fireball state for several semi-realistic models of nucleon substructure and for several practically relevant collision systems involving small nuclei is presented. The key importance of multiplicity fluctuations in such systems is pointed out. Our results show large differences from expectations based on conventional Glauber model simulations of the initial state created in such collisions.

  5. Shock Initiation and Equation of State of Ammonium Nitrate

    Science.gov (United States)

    Robbins, David; Sheffield, Steve; Dattelbaum, Dana; Chellappa, Raja; Velisavljevic, Nenad

    2013-06-01

    Ammonium nitrate (AN) is a widely used fertilizer and mining explosive commonly found in ammonium nitrate-fuel oil. Neat AN is a non-ideal explosive with measured detonation velocities approaching 4 km/s. Previously, we reported a thermodynamically-complete equation of state for AN based on its maximum density, and showed that near-full density AN did not initiate when subjected to shock input conditions up to 22 GPa. In this work, we extend these initial results, by presenting new Hugoniot data for intermediate density neat AN obtained from gas gun-driven plate impact experiments. AN at densities from 1.8 to 1.5 g/cm3 were impacted into LiF windows using a two-stage light gas gun. Dual VISARs were used to measure the interfacial particle velocity wave profile as a function of time following impact. The new Hugoniot data, in addition to updates to thermodynamic parameters derived from structural analysis and vibrational spectroscopy measurements in high pressure diamond anvil cell experiments, are used to refine the unreacted EOS for AN. Furthermore, shock initiation of neat AN was observed as the initial porosity increased (density decreased). Insights into the relationship(s) between initial density and shock initiation sensitivity are also presented, from evidence of shock initiation in the particle velocity profiles obtained for the lower density AN samples.

  6. ANALYSIS OF INNOVATIVE ACTIVITY OF METALLURGICAL COMPANIES USING MONTE-CARLO MATHEMATICAL MODEL-ING METHOD

    Directory of Open Access Journals (Sweden)

    Shchekoturova S. D.

    2015-04-01

    Full Text Available The article presents an analysis of an innovative activity of four Russian metallurgical enterprises: "Ruspolimet", JSC "Ural Smithy", JSC "Stupino Metallurgical Company", JSC "VSMPO" via mathematical modeling using Monte Carlo method. The results of the assessment of innovative activity of Russian metallurgical companies were identified in five years dynamics. An assessment of the current innovative activity was made by the calculation of an integral index of the innovative activity. The calculation was based on such six indicators as the proportion of staff employed in R & D; the level of development of new technology; the degree of development of new products; share of material resources for R & D; degree of security of enterprise intellectual property; the share of investment in innovative projects and it was analyzed from 2007 to 2011. On the basis of this data the integral indicator of the innovative activity of metallurgical companies was calculated by well-known method of weighting coefficients. The comparative analysis of integral indicators of the innovative activity of considered companies made it possible to range their level of the innovative activity and to characterize the current state of their business. Based on Monte Carlo method a variation interval of the integral indicator was obtained and detailed instructions to choose the strategy of the innovative development of metallurgical enterprises were given as well

  7. Metallurgical Evaluations of Depainting Processes on Aluminum Substrate

    Science.gov (United States)

    McGill, Preston

    1999-01-01

    In December 1993, the Environmental Protection Agency (EPA) Emission Standards Division and the National Aeronautics and Space Administration's (NASA's) Marshall Space Flight Center (MSFC) signed an Interagency Agreement (IA) initiating a task force for the technical assessment of alternative technologies for aerospace depainting operations. The United States Air Force (USAF) joined the task force in 1994. The mandates of the task force were: (1) To identify available alternative depainting systems that do not rely on methylene chloride or other ozone-depleting, chlorinated, and volatile organic carbon solvents. (2) To determine the viability, applicability, and pollution prevention potential of each identified alternative. (3) To address issues of safety, environmental impact, reliability, and maintainability. Through a Technical Implementation Committee (TIC), the task force selected and evaluated eight alternative paint stripping technologies: chemical stripping, carbon dioxide (CO2) blasting, xenon flashlamp and CO2 coatings removal (FLASHJET(R)), CO2 laser stripping, plastic media blasting (PMB), sodium bicarbonate wet stripping, high-pressure water blasting (WaterJet), and wheat starch abrasive blasting (Enviro-Strip(R)). (The CO2 blasting study was discontinued after the first depainting sequence.) This final report presents the results of the Joint EPA/NASA/USAF Interagency Depainting Study. Significant topics include: (1) Final depainting sequence data for the chemical stripping, PMB, sodium bicarbonate wet stripping, and WaterJet processes. (2) Strip rates for all eight technologies. (3) Sequential comparisons of surface roughness measurements for the seven viable depainting technologies. (4) Chronological reviews of and lessons learned in the conduct of all eight technologies. (5) An analysis of the surface roughness trends for each of the seven technologies. (6) Metallurgic evaluations of panels Summaries of corrosion and hydrogen embrittlement

  8. Initial State Radiation in Majorana Dark Matter Annihilations

    CERN Document Server

    Ciafaloni, Paolo; Comelli, Denis; De Simone, Andrea; Riotto, Antonio; Urbano, Alfredo

    2011-01-01

    The cross section for a Majorana Dark Matter particle annihilating into light fermions is helicity suppressed. We show that, if the Dark Matter is the neutral Majorana component of a multiplet which is charged under the electroweak interactions of the Standard Model, the emission of gauge bosons from the initial state lifts the suppression and allows an s-wave annihilation. The resulting energy spectra of stable Standard Model particles are importantly affected. This has an impact on indirect searches for Dark Matter.

  9. Initial-State Graviton Radiation in Quantum Black Hole Production

    CERN Document Server

    AUTHOR|(CDS)2262067

    2017-01-01

    Monte Carlo simulation of quantum black hole production in the ATLAS experiment that allows for graviton radiation in the initial state is discussed and studied. It is concluded that, using trapped surface calculations and graviton emission, a black hole signal would be significant for Planck scales up to 4.5 TeV given a proton-proton luminosity of 37 fb$^{-1}$ in the 13 TeV LHC configuration.

  10. Design, construction and initial state of the underground openings

    Energy Technology Data Exchange (ETDEWEB)

    2010-12-15

    The report is included in a set of Production reports, presenting how the KBS-3 repository is designed, produced and inspected. The set of reports is included in the safety report for the KBS-3 repository and repository facility. The report provides input on the initial state of the underground openings for the assessment of the long-term safety, SR-Site. The initial state refers to the properties of the underground openings at final disposal, backfilling or closure. In addition, the report provides input to the operational safety report, SR-Operation, on how the underground openings shall be constructed and inspected. The report presents the design premises and the methodology applied to design the underground openings and adapt them the to the site conditions so that they conform to the design premises. It presents the reference design at Forsmark and its conformity to the design premises. It also describes the reference methods to be applied to construct and inspect the different kinds of underground openings. Finally, the initial state of the underground openings and its conformity to the design premises is presented

  11. Design, production and initial state of the buffer

    Energy Technology Data Exchange (ETDEWEB)

    Boerjesson, Lennart; Gunnarsson, David; Johannesson, Lars-Erik; Jonsson, Esther

    2010-12-15

    The report is included in a set of Production reports, presenting how the KBS-3 repository is designed, produced and inspected. The set of reports is included in the safety report for the KBS-3 repository and repository facility. The report provides input on the initial state of the buffer for the assessment of the long-term safety, SR-Site. The initial state refers to the properties of the engineered barriers once they have been finally placed in the KBS-3 repository and will not be further handled within the repository facility. In addition, the report provides input to the operational safety report, SR-Operation, on how the buffer shall be handled and installed. The report presents the design premises and reference design of the buffer and verifies the conformity of the reference design to the design premises. It also describes the production of the buffer, from excavation and delivery of buffer material to installation in the deposition hole. Finally, the initial state of the buffer and its conformity to the reference design and design premises is presented

  12. Initial state regulation of investor-owned utilities

    Energy Technology Data Exchange (ETDEWEB)

    Savitski, D.W. [Department of Economics and Finance, Northern State University, 1200 South Jay Street, 57401 Aberdeen, SD (United States)

    2001-11-01

    This paper examines state initiation of public service (or utility) commission regulation of investor-owned utilities (IOUs) using an economic theory of regulation. The decision to regulate IOUs is assumed to have depended on the strength of competing interest groups, e.g. consumers and producers, and on institutional factors, e.g. whether commissioners were appointed or elected. Regulators, which then had jurisdiction over IOU rates, are assumed to have been optimizing agents. The potential benefits of regulation, in turn, translated into pressure to initiate regulation. To test this, a hazard model is applied to state-level data. On the demand side of the regulation market, the distribution of federal power and population density were unrelated, while a set of time dummies was positively related to the probability that a state initiated regulation. On the supply side, the fraction of the population that was urban and whether the governor was Republican or not were positively and negatively related to this probability.

  13. Design, production and initial state of the closure

    Energy Technology Data Exchange (ETDEWEB)

    2010-12-15

    The report is included in a set of Production reports, presenting how the KBS-3 repository is designed, produced and inspected. The production reports are included in the safety report for the KBS-3 repository and repository facility. The report provides input on the initial state of the closure and plugs in underground openings other than deposition tunnels for the assessment of the long-term safety, SR-Site. The initial state refers to the properties of the engineered barriers once they have been finally placed in the KBS-3 repository and will not be further handled within the repository facility. In addition, the report provides some input to the operational safety report, SR-Operation, on how the closure and plugs shall be handled and installed. The report presents the design premises and reference designs of the closure and plugs and verifies their conformity to the design premises. It also briefly deals with the production of the closure and plugs. Finally, the initial state of the closure and plugs and their conformity to the reference designs and design premises are presented

  14. Design, production and initial state of the canister

    Energy Technology Data Exchange (ETDEWEB)

    Cederqvist, Lars; Johansson, Magnus; Leskinen, Nina; Ronneteg, Ulf

    2010-12-15

    The report is included in a set of Production reports, presenting how the KBS-3 repository is designed, produced and inspected. The set of reports is included in the safety report for the KBS-3 repository and repository facility.The report provides input on the initial state of the canisters to the assessment of the long-term safety, SR-Site. The initial state refers to the properties of the engineered barriers once they have been finally placed in the KBS-3 repository and will not be further handled within the repository facility. In addition, the report provides input to the operational safety report, SR-Operation, on how the canisters shall be handled and disposed. The report presents the design premises and reference design of the canister and verifies the conformity of the reference design to the design premises. The production methods and the ability to produce canisters according to the reference design are described. Finally, the initial state of the canisters and their conformity to the reference design and design premises are presented

  15. Metallurgical Investigation of HSLA Steel Subjected to Underwater Explosion

    Directory of Open Access Journals (Sweden)

    V. Bhujanga Rao

    1994-01-01

    Full Text Available The metallurgical behaviour of HSLA steel subjected to underwater explosion is of prime importance because of its structural applications in underwater vehicles. HSLA steel plates 300 × 250 × 4 mm were subjected to single and repetitive shock loadings and the point of rupture was identified. Test plates exhibited mode-I (large ductile deformation and mode-II (tensile tearing macroscopic failures. Electron micrographic and fractographic examination showed that the initiation of fracture was due to adiabatic shearing and the microscopic mode of failure was ductile. Plates subjected to single shock showed an increase in residual hardness and at the point of rupture it was approximately one-third higher than the initial residual hardness.

  16. Innovation of costing system in metallurgical companies

    Directory of Open Access Journals (Sweden)

    J. Kutač

    2014-04-01

    Full Text Available Innovation means creating and implementing new ideas in theory and practice. Generally speaking, companies in the Czech Republic that don’t have a foreign owner behave very conservatively as far as the used costing system is concerned. This also applies to metallurgical companies and foundries. The decision on method of costing calculations should be included in the sphere of strategic decision-making. The strategy must also define how to use method so as to obtain new orders which, as a result, should lead to an increase in production volume, and thereby to higher capacity utilization and also to higher overall sales. The article discusses the innovation of costing system in metallurgical companies.

  17. Mass transfer coefficients in metallurgical reactors

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    An overview on the application and achievements of physico-mathematical modeling of metallurgical processes in Chinais briefly declared. The important role of coefficients in model formulation is shown from our experience. The mass transfer coeffi-cients of the slag-metal reactions and the gas-metal reactions are discussed referring to the flow conditions near the interface. Theinfluence of the surface-active species on the mass transfer and the inteffacial reaction is also discussed briefly.

  18. Modern recycling methods in metallurgical industry

    Directory of Open Access Journals (Sweden)

    M. Maj

    2010-04-01

    Full Text Available The contamination of environment caused by increased industrial activities is the main topic of discussions in Poland and in the world. The possibilities of waste recovery and recycling vary in different sectors of the industry, and the specific methods, developed and improved all the time, depend on the type of the waste. In this study, the attention has been focussed mainly on the waste from metallurgical industry and on the available techniques of its recycling

  19. Qualifications versus useful knowledge in metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2014-01-01

    Full Text Available The article presents notions connected with resource structure of useful knowledge packages in metallurgical enterprise. Dependence between building competence of employees and using knowledge for the need of better efficiency of the enterprise was discussed here. ArcelorMittal Poland enterprise served as case study here due to the fact that it strives at World Class Management by putting emphasis on bringing areas of business activity to perfection through participation and involvement of employees.

  20. Production of iron from metallurgical waste

    Science.gov (United States)

    Hendrickson, David W; Iwasaki, Iwao

    2013-09-17

    A method of recovering metallic iron from iron-bearing metallurgical waste in steelmaking comprising steps of providing an iron-bearing metallurgical waste containing more than 55% by weight FeO and FeO equivalent and a particle size of at least 80% less than 10 mesh, mixing the iron-bearing metallurgical waste with a carbonaceous material to form a reducible mixture where the carbonaceous material is between 80 and 110% of the stoichiometric amount needed to reduce the iron-bearing waste to metallic iron, and as needed additions to provide a silica content between 0.8 and 8% by weight and a ratio of CaO/SiO.sub.2 between 1.4 and 1.8, forming agglomerates of the reducible mixture over a hearth material layer to protect the hearth, heating the agglomerates to a higher temperature above the melting point of iron to form nodules of metallic iron and slag material from the agglomerates by melting.

  1. Metallurgical modelling of superalloy disc isothermal forgings

    Science.gov (United States)

    Evans, R. W.

    1988-08-01

    The metallurgical structure of superalloy aeroengine disc forgings is a complex function of the forging operation parameters and the post forging heat treatment. It is often desirable to obtain certain specific structures in parts of the disc which are, for instance, resistant to crack propagation and this has traditionally been accomplished by means of a series of production trials. This expensive and time consuming procedure can be considerably shortened if the development of microstructure during the forging can be accurately modelled by a suitable computer code. Described here is such a model and its use in the design of isothermal forged components. The model discribed is a fully thermally coupled viscoplasticity finite element algorithm. It treats nodal velocities as the basic unknowns and both the mesh geometry and the various metallurgical structural terms are updated by a single step Euler scheme. Facilities are available for ensuring that surface nodes follow die shapes after impingement, that flow is incompressible and that suitable surface friction forces are applied. Throughout the whole forging process (which may involve the re-meshing of severely distorted elements), the metallurgical history of elements is retained so that the effects of subsequent heat treatments can be assessed.

  2. Initial state report for the safety assessment SR-Can

    Energy Technology Data Exchange (ETDEWEB)

    Pers, Karin (ed.) [Kemakta Konsult AB, Stockholm (Sweden)

    2006-10-15

    A comprehensive description of the initial state of the engineered parts of the repository system is one of the main bases for the safety assessment. There is no obvious definition of the time of the initial state. For the engineered part of their repository system, the time of deposition is a natural starting point and the initial state in SR-Can is, therefore, defined as the state at the time of deposition for the engineered barrier system. The initial state of the engineered parts of the repository system is largely obtained from the design specifications of the repository, including allowed tolerances or allowance for deviations. Also the manufacturing, excavation and control methods have to be described in order to adequately discuss and handle hypothetical initial states outside the allowed limits in the design specifications. It should also be noted that many parts of the repository system are as yet not finally designed, there can be many changes in the future. The design and technical solutions presented here are representative of the current stage of development. The repository system is based on the KBS-3 method, in which copper canisters with a cast iron insert containing spent nuclear fuel are surrounded by bentonite clay and deposited at 400-700 m depth in saturated granitic rock. The facility design comprises rock caverns, tunnels, deposition positions etc. Deposition tunnels are linked by tunnels for transport and communication and shafts for ventilation. One ramp and five shafts connect the surface facility to the underground repository. The ramp is used for heavy and bulky transports and the shafts are for utility systems and for transport of excavated rock, backfill and staff. For the purposes of the safety assessment, the engineered parts of the repository system have been sub-divided into a number of components or sub-systems. These are: The fuel, (also including cavities in the canister since strong interactions between the two occur if the

  3. State-of-the-Art in Open Courseware Initiatives Worldwide

    Directory of Open Access Journals (Sweden)

    Monica VLADOIU

    2011-06-01

    Full Text Available We survey here the state-of-the-art in open courseware initiatives worldwide. First, the MIT OpenCourseWare project is overviewed, as it has been the real starting point of the OCW movement. Usually, open courseware refers to a free and open digital publication of high quality university level educational materials that are organized as courses, and include course planning materials, evaluation tools, and thematic content, under a Creative Commons license. OCW is free and open, accessible to anyone, anywhere, and anytime via the Internet. The OCW initiative started in 2002, and it has been followed by many more programs that offer open access to courseware: Carnegie Mellon Open Learning Initiative, Harvard Medical School's MyCourses, Webcast.Berkeley, Rice University's Connexions, OpenCourseWare Consortium, Open Education Resources Commons, and The Saylor Foundation's Free Education Initiative, along with other major open courseware projects worldwide. The prospects for futur development of open courseware are taken into consideration, while its potential to provide for both social construction of knowledge and for development of open educational models, and therefore for E-Learning 2.0 and Web 2.0 is emphasized.

  4. Creating cat states in one-dimensional quantum walks using delocalized initial states

    Science.gov (United States)

    Zhang, Wei-Wei; Goyal, Sandeep K.; Gao, Fei; Sanders, Barry C.; Simon, Christoph

    2016-09-01

    Cat states are coherent quantum superpositions of macroscopically distinct states and are useful for understanding the boundary between the classical and the quantum world. Due to their macroscopic nature, cat states are difficult to prepare in physical systems. We propose a method to create cat states in one-dimensional quantum walks using delocalized initial states of the walker. Since the quantum walks can be performed on any quantum system, our proposal enables a platform-independent realization of the cat states. We further show that the linear dispersion relation of the effective quantum walk Hamiltonian, which governs the dynamics of the delocalized states, is responsible for the formation of the cat states. We analyze the robustness of these states against environmental interactions and present methods to control and manipulate the cat states in the photonic implementation of quantum walks.

  5. Hindcasting to measure ice sheet model sensitivity to initial states

    Directory of Open Access Journals (Sweden)

    A. Aschwanden

    2013-07-01

    Full Text Available Validation is a critical component of model development, yet notoriously challenging in ice sheet modeling. Here we evaluate how an ice sheet system model responds to a given forcing. We show that hindcasting, i.e. forcing a model with known or closely estimated inputs for past events to see how well the output matches observations, is a viable method of assessing model performance. By simulating the recent past of Greenland, and comparing to observations of ice thickness, ice discharge, surface speeds, mass loss and surface elevation changes for validation, we find that the short term model response is strongly influenced by the initial state. We show that the thermal and dynamical states (i.e. the distribution of internal energy and momentum can be misrepresented despite a good agreement with some observations, stressing the importance of using multiple observations. In particular we identify rates of change of spatially dense observations as preferred validation metrics. Hindcasting enables a qualitative assessment of model performance relative to observed rates of change. It thereby reduces the number of admissible initial states more rigorously than validation efforts that do not take advantage of observed rates of change.

  6. Initial State Radiation Studies at BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Petzold, A.; /Dresden, Tech. U.

    2007-04-16

    We present results from BABAR on events containing a hard radiated photon from the e{sup +}e{sup -} initial state and several exclusive final states. For the {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} final state the cross section is measured for center-of-mass energies from 0.6 to 4.5 GeV. Resonant structures are studied and confirmed to be dominated by the a{sub 1}(1260){pi}, with a contribution from f{sub 2}(1270){rho}(770). Similar studies are shown for {pi}{sup +}{pi}{sup -}K{sup +}K{sup -} and K{sup +}K{sup -}K{sup +}K{sup -} from their respective thresholds up to 4.5 GeV. From the {pi}{sup +}{pi}{sup -}{pi}{sup 0} final state the products of the branching fractions of the {omega} and {phi} mesons have been obtained and the cross section is measured from 1.05 to 3.00 GeV. In addition the J/{psi} branching fractions to all four final states have been measured.

  7. Collectivity in small collision systems : an initial state perspective

    CERN Document Server

    Schlichting, Sören

    2016-01-01

    Measurements of multi-particle correlations in the collisions of small systems such as $p+p$, $p/d/^3He+A$ show striking similarity to the observations in heavy ion collisions. A number of observables measured in the high multiplicity events of these systems resemble features that are attributed to collectivity driven by hydrodynamics. However alternative explanations based on initial state dynamics are able to describe many characteristic features of these measurements. In this brief review we highlight some of the recent developments and outstanding issues in this direction.

  8. Turning State Data and Research into Information: An Example from Washington State's Student Achievement Initiative

    Science.gov (United States)

    Prince, David; Seppanen, Loretta; Stephens, Deborah; Stewart, Carmen

    2010-01-01

    This chapter discusses Washington State's Student Achievement Initiative, a new performance funding system for community and technical colleges. Its purposes are to improve public accountability by more accurately describing what students achieve from enrolling in state colleges each year and provide incentives through financial rewards to…

  9. Creating cat states in one-dimensional quantum walks using delocalized initial states

    CERN Document Server

    Zhang, Wei-Wei; Gao, Fei; Sanders, Barry C; Simon, Christoph

    2016-01-01

    Cat states are coherent quantum superpositions of macroscopically distinct states, and are useful for understanding the boundary between the classical and the quantum world. Due to their macroscopic nature, cat states are difficult to prepare in physical systems. We propose a method to realize the cat states in one-dimensional quantum walks using delocalized initial states of the walker. We show that the linear dispersion relation of the effective quantum walk Hamiltonian, which governs the dynamics of the delocalized states, is responsible for the formation of the cat states. We analyze the robustness of these states against the environmental interactions. We present methods to control and manipulate the cat states in the photonic implementation of quantum walks.

  10. Sustainable cost reduction by lean management in metallurgical processes

    OpenAIRE

    A. V. Todorut; L. Paliu-Popa; V. S. Tselentis; D. Cirnu

    2016-01-01

    This paper focuses on the need for sustainable cost reduction in the metallurgical industry by applying Lean Management (LM) tools and concepts in metallurgical production processes leading to increased competitiveness of corporations in a global market. The paper highlights that Lean Management is a novel way of thinking, adapting to change, reducing waste and continuous improvement, leading to sustainable development of companies in the metallurgical industry. The authors outline the main L...

  11. Investigation of metallurgical coatings for automotive applications

    Science.gov (United States)

    Su, Jun Feng

    Metallurgical coatings have been widely used in the automotive industry from component machining, engine daily running to body decoration due to their high hardness, wear resistance, corrosion resistance and low friction coefficient. With high demands in energy saving, weight reduction and limiting environmental impact, the use of new materials such as light Aluminum/magnesium alloys with high strength-weight ratio for engine block and advanced high-strength steel (AHSS) with better performance in crash energy management for die stamping, are increasing. However, challenges are emerging when these new materials are applied such as the wear of the relative soft light alloys and machining tools for hard AHSS. The protective metallurgical coatings are the best option to profit from these new materials' advantages without altering largely in mass production equipments, machinery, tools and human labor. In this dissertation, a plasma electrolytic oxidation (PEO) coating processing on aluminum alloys was introduced in engine cylinder bores to resist wear and corrosion. The tribological behavior of the PEO coatings under boundary and starve lubrication conditions was studied experimentally and numerically for the first time. Experimental results of the PEO coating demonstrated prominent wear resistance and low friction, taking into account the extreme working conditions. The numerical elastohydrodynamic lubrication (EHL) and asperity contact based tribological study also showed a promising approach on designing low friction and high wear resistant PEO coatings. Other than the fabrication of the new coatings, a novel coating evaluation methodology, namely, inclined impact sliding tester was presented in the second part of this dissertation. This methodology has been developed and applied in testing and analyzing physical vapor deposition (PVD)/ chemical vapor deposition (CVD)/PEO coatings. Failure mechanisms of these common metallurgical hard coatings were systematically

  12. On a Modified Initial State for Perturbative QCD

    CERN Document Server

    Madrazo, M R; Madrazo, Marcos Rigol; Oca, Alejandro Cabo Montes de

    2000-01-01

    A particular initial state for the construction of the perturbative expansion of QCD is investigated. It is formed as a coherent superposition of zero momentum gluon pairs and shows Lorentz as well as global SU3 symmetries. It follows that the gluon and ghost propagators determined by it, coincides with the ones used in an alternative of the usual perturbation theory proposed in a previous work. Therefore, the ability of such a procedure of producing a finite gluon condensation parameter already in the first orders of perturbation theory is naturally explained. It also follows that this state satisfies the physicality condition of the BRST procedure in its Kugo and Ojima formulation. The BRST quantization is done for the value alpha=1 of the gauge parameter where the procedure is greatly simplified. Therefore, after assuming that the adiabatic connection of the interaction does not takes out the state from the interacting physical space, the predictions of the perturbation expansion, at the value alpha=1 , fo...

  13. 7th european metallurgical conference EMC 2013

    Directory of Open Access Journals (Sweden)

    Srećko R. Stopić

    2014-02-01

    Full Text Available From June 23 – 26, 2013, the GDMB Society for Mining, Metallurgy, Resource and Environmental Technology organized 7th European Metallurgical Conference (EMC 2013 in Weimar, Germany. The previous European metallurgical conferences were organized by  the GDMB in Friedrichshafen (2001, Hanover (2003, Leipzig (2005, Duesseldorf (2007, Innsbruck (2009, and Duesseldorf (2011. The GDMB is a non-profit organization from Clausthal, Germany,,focused on combining science with practical experience in metallurgy, mining, materials engineering, mineral processing, recycling and refining of metals, and  manufacturing of semi- and finishing products. The European Metallurgical conference EMC is one of the most well-known conferences worldwide in the field of non-ferrous metallurgy and is attended regularly by decision makers from industry and universities. The scientific program contained 6 plenary lectures and more than 130 presentations. An extensive poster exhibition was held, during which the authors had an opportunity to introduce their posters to the entire plenum as a part of a brief presentation., The € 500 worth “Poster Award EMC 2011 was awarded to Christoph Pichler from the Montan-University in Leoben, Austria. Not only the most important European countries were represented here, but also more than one third of the lecturers were from countries outside Europe (Canada, Japan, China, USA, South Africa, Australia. The origin of the participants reflects the aim of the organizers: to make this conference a worldwide platform for the scientific exchange of experience and information. The scientific presentations of the conference are presented in Proceedings: Vol. 1: Copper, Precious Metals, Waste effluents Treatment/ Biohydrometallurgical applications; Process Metallurgy, Bridging Non-Ferrous and Ferrous Metallurgy; Vol. 2: Lead and Zinc, Light metals, Sustainable technologies, Sustainable of non-ferrous metals production, Process Control

  14. Greenhouse gases and the metallurgical process industry

    Energy Technology Data Exchange (ETDEWEB)

    Lupis, C.H.P.

    1999-10-01

    The present lecture offers a brief review of the greenhouse effect, the sources of greenhouse gases, the potential effect of these gases on global warming, the response of the international community, and the probable cost of national compliance. The specific emissions of the metallurgical process industry, particularly those of the steel and aluminum sectors, are then examined. The potential applications of life-cycle assessments and of an input-output model in programs of emissions' abatement are investigated, and, finally, a few remarks on some implications for education are presented.

  15. Application of logistic principles in metallurgical production

    Directory of Open Access Journals (Sweden)

    D. Malindžák

    2012-07-01

    Full Text Available Metallurgical production processes (MPP consist of continuous and discrete types of technology operation, transport, manipulation and storing processes regards the flow of material and also the equipment and machines. Other specifics are: long production cycles, great inertia, tree structure of production processes (from roots up to the leaves, high level of investments etc. These characteristics resulted in some specifics of production logistics. This article deals with these specifics and explains it using the conditions of production processes of continuous slab casting, their heating in push furnaces at rolling temperature and rolling itself in hot wideband steel mill.

  16. Laser repairing of parts in metallurgical industries

    Science.gov (United States)

    Yang, Xichen; Wang, Yunshan; Zhao, Xin

    1999-09-01

    A new repair system for hardfacing of parts in metallurgical industries has been developed. The system can produce single pass quenching or cladding width of 10 - 35 mm, thickness of 0.5 - 10 mm. The wide range of powder materials can be deposited to provide hardfacing layers against wear, corrosion and oxidation. Comparing with welding and flame spraying, it presents clear advantages with low distortion, low dilution, low cost and small postclad machining. It has been successfully used to repair some of parts, for example, roll, drawing wire wheel in high speed wire, and so on.

  17. The Initial State of a Primordial Anisotropic Stage of Inflation

    Energy Technology Data Exchange (ETDEWEB)

    Blanco-Pillado, Jose J. [Department of Theoretical Physics, University of the Basque Country UPV/EHU,48080 Bilbao (Spain); IKERBASQUE, Basque Foundation for Science,Maria Diaz de Haro 3, 48013 Bilbao (Spain); Minamitsuji, Masato [Yukawa Institute for Theoretical Physics, Kyoto University,Kitashirakawa-Oiwakecho, Sakyo-Ku, Kyoto 606-8502 (Japan); CENTRA, Instituto Superior Tecnico, Universidade de Lisboa,Avenida Rovisco Pais 1, 1049-001 Lisboa (Portugal)

    2015-06-12

    We investigate the possibility that the inflationary period in the early universe was preceded by a primordial stage of strong anisotropy. In particular we focus on the simplest model of this kind, where the spacetime is described by a non-singular Kasner solution that quickly evolves into an isotropic de Sitter space, the so-called Kasner-de Sitter solution. The initial Big Bang singularity is replaced, in this case, by a horizon. We show that the extension of this metric to the region behind the horizon contains a timelike singularity which will be visible by cosmological observers. This makes it impossible to have a reliable prediction of the quantum state of the cosmological perturbations in the region of interest. In this paper we consider the possibility that this Kasner-de Sitter universe is obtained as a result of a quantum tunneling process effectively substituting the region behind the horizon by an anisotropic parent vacuum state, namely a 1+1 dimensional spacetime compactified over an internal flat torus, T{sub 2}, which we take it to be of the form de Sitter{sub 2}×T{sub 2} or Minkowski{sub 2}×T{sub 2}. As a first approximation to understand the effects of this anisotropic initial state, we compute the power spectrum of a massless scalar field in these backgrounds. In both cases, the spectrum converges at small scales to the isotropic scale invariant form and only present important deviations from it at the largest possible scales. We find that the decompactification scenario from M{sub 2}×T{sub 2} leads to a suppressed and slightly anisotropic power spectrum at large scales which could be related to some of the anomalies present in the current CMB data. On the other hand, the spectrum of the universe with a dS{sub 2}×T{sub 2} parent vacuum presents an enhancement in power at large scales not consistent with observations.

  18. Initial State Helicity Correlation in Wide Angle Compton Scattering

    Science.gov (United States)

    Zhang, Jixie; Day, Donal; Keller, Dustin; Rondon, Oscar

    2014-09-01

    The applicability of pQCD to exclusive reactions at medium energies is a subject of considerable interest. Real Compton scattering (RCS) has the potential to provide insight to this unsettled issue. In pQCD, three active quarks and two hard gluons are involved when describing RCS. But the cross sections do not agree with the pQCD predictions. In contrast, a handbag dominance model, involving only one single quark coupling to the spectator through generalized parton distributions (GPDs) does a good job of matching the cross section data. A measurement of the longitudinal polarization transfer parameter KLL was found inconsistent with predictions of pQCD yet consistent with calculations within the hand-bag mechanism. Further Miller's handbag approach, which including quark and hadron helicity flip, contradicts pQCD and others which demands that KLL =ALL , the initial state helicity correlation asymmetry, by finding that KLL ≠ALL . The first ever measurement of ALL has been proposed to run in Jefferson Lab's Hall C. This experiment will utilize an untagged bremsstrahlung photon beam and the longitudinally polarized UVA/JLAB proton target. After a brief introduction to the physics, the experiment will be described and the expected results presented.

  19. Initial-state interactions, factorization, and the Drell-Yan process

    Energy Technology Data Exchange (ETDEWEB)

    Bodwin, G.T.; Brodsky, S.J.; Lepage, G.P.

    1981-12-01

    It is shown that initial state interactions violate the factorization conjecture for the Drell-Yan process order by order in perturbation theory. Also, the effects of elastic and inelastic initial state interactions on the observed cross sections are discussed.

  20. Metallurgical technologies, energy conversion, and magnetohydrodynamic flows

    Energy Technology Data Exchange (ETDEWEB)

    Branover, H.; Unger, Y.

    1993-01-01

    The present volume discusses metallurgical applications of MHD, R D on MHD devices employing liquid working medium for process applications, electromagnetic (EM) modulation of molten metal flow, EM pump performance of superconducting MHD devices, induction EM alkali-metal pumps, a physical model for EM-driven flow in channel-induction furnaces, grain refinement in Al alloys via EM vibrational method, dendrite growth of solidifying metal in dc magnetic field, MHD for mass and heat transfer in single-crystal melt growth, inverse EM shaping, and liquid-metal MHD development in Israel. Also discussed are the embrittlement of steel by lead, an open cycle MHD disk generator, the acceleration of gas-liquid piston flows for molten-metal MHD generators, MHD flow around a cylinder, new MHD drag coefficients, liquid-metal MHD two-phase flow, and two-phase liquid gas mixers for MHD energy conversion.

  1. Consumer Satisfaction in Long-Term Care: State Initiatives in Nursing Homes and Assisted Living Facilities

    Science.gov (United States)

    Lowe, Timothy J.; Lucas, Judith A.; Castle, Nicholas G.; Robinson, Joanne P.; Crystal, Stephen

    2003-01-01

    Purpose: We report the results of a survey of state initiatives that measure resident satisfaction in nursing homes and assisted living facilities, and we describe several model programs for legislators and public administrators contemplating the initiation of their own state programs. Design and Methods: Data on state initiatives and programs…

  2. Initial state-resolved excited state absorption spectroscopy of ZBLAN:Ho3+ glass

    Science.gov (United States)

    Piatkowski, D.; Wisniewski, K.; Koepke, C.; Piramidowicz, R.; Klimczak, M.; Malinowski, M.

    2008-12-01

    Phase-sensitive and frequency-resolved detection techniques are used for the initial state-resolved excited state absorption (ESA) measurements in ZBLAN:Ho3+ glass. Both experimental techniques were applied simultaneously in a broad spectral range (550 1750 nm) for the first time. Estimated results are compared and discussed in detail. A simple kinetic model, used for qualitative considerations, is presented and successfully compared with the experimental data. The measured spectra will be useful for identifying new up-conversion excitation channels in the considered system, where ESA transitions originating from several excited levels are observed.

  3. BRIE: The Penn State Biogeochemical Research Initiative for Education

    Science.gov (United States)

    Freeman, K. H.; Brantley, S. L.; Brenchley, J.

    2003-12-01

    Few scientists are prepared to address the interdisciplinary challenges of biogeochemical research due to disciplinary differences in vocabulary, technique, and scientific paradigm. Thus scientists and engineers trained in traditional disciplines bring a restricted view to the study of environmental systems, which can limit their ability to exploit new techniques and opportunities for scientific advancement. Although the literature is effusive with enthusiasm for interdisciplinary approaches to biogeochemistry, there remains the basic difficulty of cross-training geological and biological scientists. The NSF-IGERT funded Biogeochemical Research Initiative for Education (BRIE) program at Penn State is specifically designed to break down both disciplinary and institutional barriers and it has fostered cross-disciplinary collaboration and training since 1999. Students and faculty are drawn from environmental engineering, geochemistry, soil science, chemistry and microbiology, and the program is regarded on the Penn State campus as a successful example of how interdisciplinary science can best be promoted. There are currently 23 Ph.D. students funded by the program, with an additional 7 affiliated students. At present, a total of 6 students have completed doctoral degrees, and they have done so within normal timeframes. The program is "discipline-plus," whereby students enroll in traditional disciplinary degree programs, and undertake broad training via 12 credits of graduate coursework in other departments. Students are co-advised by faculty from different disciplines, and engage in interdisciplinary research facilitated by research "credit cards." Funding is available for international research experiences, travel to meetings, and other opportunities for professional development. Students help institutionalize interdisciplinary training by designing and conducting a teaching module that shares their expertise with a class in another department or discipline

  4. Sustainable cost reduction by lean management in metallurgical processes

    Directory of Open Access Journals (Sweden)

    A. V. Todorut

    2016-10-01

    Full Text Available This paper focuses on the need for sustainable cost reduction in the metallurgical industry by applying Lean Management (LM tools and concepts in metallurgical production processes leading to increased competitiveness of corporations in a global market. The paper highlights that Lean Management is a novel way of thinking, adapting to change, reducing waste and continuous improvement, leading to sustainable development of companies in the metallurgical industry. The authors outline the main Lean Management instruments based on recent scientific research and include a comparative analysis of other tools, such as Sort, Straighten, Shine, Standardize, Sustain (5S, Visual Management (VM, Kaizen, Total Productive Maintenance (TPM, Single-Minute Exchange of Dies (SMED, leading to a critical appraisal of their application in the metallurgical industry.

  5. A survey of metallurgical research on several actinides

    Energy Technology Data Exchange (ETDEWEB)

    Olivas, J.D.; Schonfeld, F.W.

    1993-11-01

    A Los Alamos perspective on metallurgical research on neptunium, plutonium, americium, curium, and californium is presented. Alloying behaviors of these metals are discussed. Metal fabrication technologies, principally for plutonium, are emphasized.

  6. On Reduced Time Evolution for Initially Correlated Pure States

    CERN Document Server

    Aniello, P; Marmo, G; Ventriglia, F; Vitale, P

    2009-01-01

    A new method to deal with reduced dynamics of open systems by means of the Schr\\"odinger equation is presented. It allows one to consider the reduced time evolution for correlated and uncorrelated initial conditions.

  7. Soft restructuring process in metallurgical enterprises in Poland

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2015-10-01

    Full Text Available This article presents the range and outcomes of soft restructuring in metallurgical enterprises in Poland. The term ‘soft restructuring’ applies to changes in metallurgical enterprises’ employment policy during the period of political transformation in Poland. Steelworks performance under the market economy conditions demanded introducing changes in staff resources. Changes referred both to the staff structure as well as employees’ skills and gradual engaging of the staff in building the steelworks’ competitive advantage.

  8. Mercury distribution in an abandoned metallurgical plant

    Directory of Open Access Journals (Sweden)

    Millán R.

    2013-04-01

    Full Text Available The aim of the work is to evaluate the spatial distribution of Hg in the soil-plant system within an area where intense activity of Hg was dominant over a long period. An abandoned metallurgical plant from the 17th-18th centuries was chosen as the study area. It is situated in Almadenejos within the Almadén mining district (Spain that constitutes the largest and most unusual concentration of mercury in the world and has provided a third of the entire world production of mercury (Hg. Nowadays, this study area is covered with cinnabar mine tailings and village habitants use it for livestock. The area has elevated Hg concentrations of natural origin and from human activities. Soil parameters are similar throughout the study area; however, data reveal high variability in total and available Hg concentrations in soils, making it difficult to establish a tendency. Marrubium vulgare L.has been studied due to its high presence in the field plot, and there is no evidence of phenological toxicity. Furthermore, in spite of elevated Hg concentrations, a good biological activity is tested in the soil samples. All these characteristics, spatial variation, high Hg concentration, good biological activity, enhance the peculiarity of the study area for studies involving Hg.

  9. A metallurgical study of some viking swords

    Directory of Open Access Journals (Sweden)

    Williams, Alan

    2009-12-01

    Full Text Available While «pattern-welded» swords have been found all over Europe from sites dating from the Migration Period and into the Early Middle Ages, they were steadily supplanted during the Viking period by swords made out of a few pieces of iron and steel, or even a single piece of steel. Swords with «Ulfberht» or related inscriptions were the most famous of these. The results of the metallurgical study of 44 specimens from «Ulfberht» swords, as well as some other Viking-age swords, together with electron microanalyses carried out on selected examples, are presented here.

    Mientras que se han encontrado en toda Europa espadas forjadas mediante el sistema de ‘pattern welding’ (entrelazado de láminas formando patrones visibles, procedentes de yacimientos que se extienden desde el Periodo de las Migraciones bárbaras hasta la Alta Edad Media, durante el periodo vikingo fueron habitualmente reemplazadas por espadas forjadas a partir de unas pocas piezas de hierro y acero, o incluso de una única pieza de acero. Las más famosas de entre ellas fueron las espadas con la inscripción «Ulfbehrt» u otras relacionadas. Este artículo presenta los resultados del estudio metalúrgico de 44 ejemplares de espadas de «Ulfberht» y otras de época vikinga, así como los microanálisis efectuados sobre algunas muestras seleccionadas.

  10. NMR investigation of boron impurities in refined metallurgical grade silicon

    Energy Technology Data Exchange (ETDEWEB)

    Grafe, Hans-Joachim; Loeser, Wolfgang; Schmitz, Steffen; Sakaliyska, Miroslava [Leibniz Institute for Solid State and Materials Research (IFW), Dresden (Germany); Wurmehl, Sabine [Leibniz Institute for Solid State and Materials Research (IFW), Dresden (Germany); Institute for Solid State Physics, Technische Universitaet Dresden (Germany); Eisert, Stefan; Reichenbach, Birk; Mueller, Tim [Adensis GmbH, Dresden (Germany); Acker, Joerg; Rietig, Anja; Ducke, Jana [Department of Chemistry, Faculty for Natural Sciences, Brandenburg Technical University Cottbus-Senftenberg, Senftenberg (Germany)

    2015-09-15

    The nuclear magnetic resonance (NMR) method was applied for tracking boron impurities in the refining process of metallurgical grade (MG) silicon. From the NMR signal of the {sup 11}B isotope at an operating temperature 4.2 K, the boron concentration can be estimated down to the order of 1-10 wppm B. After melting and resolidification of MG-Si alloyed with Ca and Ti, a major fraction of B impurities remains in the Si solid solution as inferred from the characteristic NMR frequency. The alloying element Ti does not form substantial fractions of TiB{sub 2}. Acid leaching of crushed powders of MG-Si alloyed with Ca and Ti can diminish the initial impurity content of B suggesting its accumulation in the grain boundary phases. NMR signals of TiB{sub 2} at 4.2 K and room temperature (RT), and of poly-Si with different B doping at 4.2 K. (copyright 2015 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  11. Understanding the nuclear initial state with an electron ion collider

    Science.gov (United States)

    Toll, Tobias

    2013-09-01

    In these proceedings I describe how a future electron-ion collider will allow us to directly measure the initial spatial distribution of gluons in heavy ions, as well as its variance ("lumpiness") in exclusive diffraction. I show the feasibility of such a measurement by means of simulated data from the novel event generator Sartre.

  12. Small Island States Green Energy Initiative. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Khattak, Nasir [Climate Inst., Washington, DC (United States)

    1999-10-15

    This report covers the activities carried out during a one year period from 7/15/99 to 7/15/00 as part of the Small Islands Green Energy Initiative. The three activities were: 1) Energy Ministerial conference in the Caribbean; 2) Training session on renewable energy for utility engineers; and 3) Case studies compilation on renewable energy in the Caribbean.

  13. The two faces of coal : uncertainty the common prospect for metallurgical and thermal coal

    Energy Technology Data Exchange (ETDEWEB)

    Zlotnikov, D.

    2010-09-15

    Although the methods of producing thermal and metallurgical coal are the same, metallurgical coal is destined to cross the world for steel manufacturing and thermal coal is destined for power plants close to where it was mined. This article discussed the factors influencing the price of these 2 coals. The production of thermal coal can remain steady during an economic crisis because coal-fired power plants generally provide low-cost-base-load electricity that remains stable during economic cycles. However, the demand for metallurgical coal is more volatile during an economic crisis because it is directly related to the demand for steel products in the construction and automotive industry, which are very sensitive to the state of the economy. There have been recent indications that Canada's export market for thermal coal is on the rise. In 2008, China became a net importer of coking coal. China's need for more coal to fuel its growing economy despite the global economic slowdown has meant that producers are diverting excess supply from European markets to China. Higher-end thermal coal offers low sulphur content and higher energy content, both desirable traits for power utilities facing strict emissions control. In addition to having huge reserves of very high-quality coal that is becoming increasingly important to China, Canada has the advantage of having the available transportation capacity in its west coast terminals and on its rail network. 3 figs.

  14. Toward a semi-self-paced EEG brain computer interface: decoding initiation state from non-initiation state in dedicated time slots.

    Directory of Open Access Journals (Sweden)

    Lingling Yang

    Full Text Available Brain computer interfaces (BCIs offer a broad class of neurologically impaired individuals an alternative means to interact with the environment. Many BCIs are "synchronous" systems, in which the system sets the timing of the interaction and tries to infer what control command the subject is issuing at each prompting. In contrast, in "asynchronous" BCIs subjects pace the interaction and the system must determine when the subject's control command occurs. In this paper we propose a new idea for BCI which draws upon the strengths of both approaches. The subjects are externally paced and the BCI is able to determine when control commands are issued by decoding the subject's intention for initiating control in dedicated time slots. A single task with randomly interleaved trials was designed to test whether it can be used as stimulus for inducing initiation and non-initiation states when the sensory and motor requirements for the two types of trials are very nearly identical. Further, the essential problem on the discrimination between initiation state and non-initiation state was studied. We tested the ability of EEG spectral power to distinguish between these two states. Among the four standard EEG frequency bands, beta band power recorded over parietal-occipital cortices provided the best performance, achieving an average accuracy of 86% for the correct classification of initiation and non-initiation states. Moreover, delta band power recorded over parietal and motor areas yielded a good performance and thus could also be used as an alternative feature to discriminate these two mental states. The results demonstrate the viability of our proposed idea for a BCI design based on conventional EEG features. Our proposal offers the potential to mitigate the signal detection challenges of fully asynchronous BCIs, while providing greater flexibility to the subject than traditional synchronous BCIs.

  15. What Can the Common Core State Standards Initiative Learn from the National Assessment Governing Board?

    Science.gov (United States)

    Musick, Mark

    2010-01-01

    The Common Core State Standards Initiative (CCSSI) is a bit like the underdog candidate who wins the election when few think it possible. "Now what?" is the question facing the surprised victor. With an initial agreement for the Common Core State Standards to be developed, and visible progress toward their development and promulgation, what will…

  16. Moving State Marine SINS Initial Alignment Based on High Degree CKF

    Directory of Open Access Journals (Sweden)

    Yong-Gang Zhang

    2014-01-01

    Full Text Available A new moving state marine initial alignment method of strap-down inertial navigation system (SINS is proposed based on high-degree cubature Kalman filter (CKF, which can capture higher order Taylor expansion terms of nonlinear alignment model than the existing third-degree CKF, unscented Kalman filter and central difference Kalman filter, and improve the accuracy of initial alignment under large heading misalignment angle condition. Simulation results show the efficiency and advantage of the proposed initial alignment method as compared with existing initial alignment methods for the moving state SINS initial alignment with large heading misalignment angle.

  17. Initial state azimuthal anisotropies in small collision systems

    CERN Document Server

    Lappi, T

    2015-01-01

    Strong multiparticle azimuthal correlations have recently been observed in high energy proton-nucleus collisions. While final state collective effects can be responsible for many of the observations, the domain structure in the classical color field of a high energy nucleus also naturally leads to such correlations. We describe recent calculations of the momentum space 2-particle cumulant azimuthal anisotropy coefficients v_n{2}, n=2,3,4 from fundamental representation Wilson line distributions describing the high energy nucleus. We find significant differences between Wilson lines from the MV model and from JIMWLK evolution. We also discuss the relation of this calculation to earlier work on the ridge correlation obtained in the "glasma graph" approximation, and to the "color electric field domain model."

  18. Energy-dissipation-model for metallurgical multi-phase-systems

    Energy Technology Data Exchange (ETDEWEB)

    Mavrommatis, K.T. [Rheinisch-Westfaelische Technische Hochschule Aachen, Aachen (Germany)

    1996-12-31

    Entropy production in real processes is directly associated with the dissipation of energy. Both are potential measures for the proceed of irreversible processes taking place in metallurgical systems. Many of these processes in multi-phase-systems could then be modelled on the basis of the energy-dissipation associated with. As this entity can often be estimated using very simple assumptions from first principles, the evolution of an overall measure of systems behaviour can be studied constructing an energy-dissipation -based model of the system. In this work a formulation of this concept, the Energy-Dissipation-Model (EDM), for metallurgical multi-phase-systems is given. Special examples are studied to illustrate the concept, and benefits as well as the range of validity are shown. This concept might be understood as complement to usual CFD-modelling of complex systems on a more abstract level but reproducing essential attributes of complex metallurgical systems. (author)

  19. Metallurgical Evaluation of the Five-Inch Cylindrical Induction Melter

    Energy Technology Data Exchange (ETDEWEB)

    Imrich, K.J.

    2000-08-15

    A metallurgical evaluation of the 5-inch cylindrical induction melter (CIM) vessel was performed by the Materials Technology Section to evaluate the metallurgical condition after operating for approximately 375 hours at 1400 to 1500 Degrees Celsius during a 2 year period. Results indicate that wall thinning and significant grain growth occurred in the lower portion of the conical section and the drain tube. No through-wall penetrations were found in the cylindrical and conical sections of the CIM vessel and only one leak site was identified in the drain tube. Failure of the drain tube was associated with a localized over heating and intercrystalline fracture.

  20. Model of truly closed circuit of waste stream flow in metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2014-04-01

    Full Text Available The publication presents flows of metallurgical waste in manufacturing metallurgical enterprise. On the basis of analysis the structure of waste flows and the way of waste management within the enterprise or outside it were described. In the observation of the metallurgical waste flow a universal model of waste flow structure was created. It may be used in waste management of a metallurgical enterprise with full production cycle (from raw materials processes, through steel production up to final products.

  1. Stress release phenomena in chromia scales formed on NiCr-30 alloys: Influence of metallurgical parameters

    Science.gov (United States)

    Guerain, M.; Goudeau, P.; Grosseau-Poussard, J. L.

    2011-11-01

    Stress release phenomena are studied for α-Cr2O3 thermal oxide films grown on NiCr-30 alloys. The influence of specific metallurgical parameters, such as cooling rate and initial surface roughness, is investigated thanks to Raman spectroscopy. Systematic correlations are established between the residual stress level in the scales and the damage rate resulting from a delamination process by buckling. Different buckling morphologies are characterized mainly according to the cooling rate range.

  2. Juvenile Justice Reform Initiatives in the States: 1994-1996. Program Report.

    Science.gov (United States)

    National Criminal Justice Association, Washington, DC.

    This overview of recent state juvenile justice reform measures and identifies issues and trends associated with state juvenile reform initiatives. The report explains some of the more punitive measures, such as new criminal court transfer authority and expanded juvenile court sentencing options. Many states have balanced these steps with enhanced…

  3. The energy-momentum tensor for an effective initial state and the renormalization of gravity

    CERN Document Server

    Collins, H S; Collins, Hael

    2006-01-01

    We renormalize the divergences in the energy-momentum tensor of a scalar field that begins its evolution in an effective initial state. The effective initial state is a formalism that encodes the signatures of new physics in the structure of the quantum state of a field; in an inflationary setting, these signatures could include trans-Planckian effects. We treat both the scalar field and gravity equivalently, considering each as a small quantum fluctuation about a spatially independent background. The classical gravitational equations of motion then arise as a tadpole condition on the graviton. The contribution of the scalar field to these equations contains divergences associated with the structure of the effective state. However, these divergences occur only at the initial time, where the state was defined, and they accompany terms depending solely upon the classical gravitational background. We define the renormalization prescription that adds the appropriate counterterms at the initial-time boundary to ca...

  4. Contemporary elements of quality management system in the metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    Z. Skuza

    2011-04-01

    Full Text Available In this paper authors submit a method of quality estimation for metallurgical products. The method include three aspects: product’s fulfillment of appointed properties (essential sense of quality, product’s fulfillment of requirements of environmental protection (liquidation quality, level of waste management, energetic quality, onerousness of production process for health of workers.

  5. Control of innovation activity in a competitive metallurgical business

    Science.gov (United States)

    Bogdanov, S. V.

    2010-12-01

    Certain competitive advantages of a manufacturer on a goods market can be provided if one creates conditions for bifurcation development of an innovation process in metallurgical business under conditions of market uncertainty of a demand for goods of a specified consumer quality and determines the technical-and-economic versions of stable operation of a production system for performing orders of metal product consumers.

  6. The 1990 Montana initiative to increase cigarette taxes: lessons for other states and localities.

    Science.gov (United States)

    Moon, R W; Males, M A; Nelson, D E

    1993-01-01

    In November 1990, voters in Montana defeated an initiative that would have increased the state's excise tax on a pack of cigarettes by 25 cents. The increased revenues were intended for tobacco education and research. Opponents of the measure, primarily tobacco companies, outspent proponents by more than 35 to 1. Their primary themes were opposition to new taxes and to a larger state bureaucracy. Based on the results of initiative campaigns in Montana and California, taxation initiatives are more likely to succeed if guidance is sought from leaders of similar campaigns in other states, tobacco control coalitions are built and funding secured early, and polling conducted before initiative measures are finalized. Other requirements for success include careful wording of the initiative, strong leadership, consideration of a paid petition drive, effective use of the news media, anticipating opposition arguments, and emphasizing the benefits of the tax increase in the campaign.

  7. Evaluating the performance of vehicular platoon control under different network topologies of initial states

    Science.gov (United States)

    Li, Yongfu; Li, Kezhi; Zheng, Taixiong; Hu, Xiangdong; Feng, Huizong; Li, Yinguo

    2016-05-01

    This study proposes a feedback-based platoon control protocol for connected autonomous vehicles (CAVs) under different network topologies of initial states. In particularly, algebraic graph theory is used to describe the network topology. Then, the leader-follower approach is used to model the interactions between CAVs. In addition, feedback-based protocol is designed to control the platoon considering the longitudinal and lateral gaps simultaneously as well as different network topologies. The stability and consensus of the vehicular platoon is analyzed using the Lyapunov technique. Effects of different network topologies of initial states on convergence time and robustness of platoon control are investigated. Results from numerical experiments demonstrate the effectiveness of the proposed protocol with respect to the position and velocity consensus in terms of the convergence time and robustness. Also, the findings of this study illustrate the convergence time of the control protocol is associated with the initial states, while the robustness is not affected by the initial states significantly.

  8. Time evolution of initial states that extend beyond the potential interaction region in quantum decay

    Science.gov (United States)

    García-Calderón, Gastón; Villavicencio, Jorge; Hernández-Maldonado, Alberto; Romo, Roberto

    2016-08-01

    We investigate the decay of initial states that possess a tail that extends beyond the interaction potential region, for potentials of arbitrary shape that vanish exactly after a distance. This is the case for a relevant class of artificial quantum structures. We obtain that along the internal interaction region, the time evolution of the decaying wave function is formed by two terms. The first one refers to the proper decay of the internal portion of the initial state, whereas the second one, that arises from the external tail, yields a transient contribution that tunnels into the internal region, builds up to a value, and then decays. We obtain that depending on the parameters of the initial state, the nonexponential tail decaying contribution may be larger than the contribution of the proper nonexponential term. These results are illustrated by an exactly solvable model and the Heidelberg potential for decay of ultracold atoms and open the possibility to control initial states in artificial decaying systems.

  9. Genital Warts -- Initial Visits to Physicians' Offices, United States, 1966 - 2012

    Science.gov (United States)

    ... Data & Statistics Sexually Transmitted Diseases Figure 46. Genital Warts — Initial Visits to Physicians’ Offices, United States, 1966 – ... page . NOTE : The relative standard errors for genital warts estimates of more than 100,000 range from ...

  10. The renormalization of the energy-momentum tensor for an effective initial state

    CERN Document Server

    Collins, H S; Collins, Hael

    2006-01-01

    An effective description of an initial state is a method for representing the signatures of new physics in the short-distance structure of a quantum state. The expectation value of the energy-momentum tensor for a field in such a state contains new divergences that arise when summing over this new structure. These divergences occur only at the initial time at which the state is defined and therefore can be cancelled by including a set of purely geometric counterterms that also are confined to this initial surface. We describe this gravitational renormalization of the divergences in the energy-momentum tensor for a free scalar field in an isotropically expanding inflationary background. We also show that the back-reaction from these new short-distance features of the state is small when compared with the leading vacuum energy contained in the field.

  11. Reduced quantum dynamics with initial system-environment correlations characterized by pure Markov states

    Science.gov (United States)

    Türkmen, A.; Verçin, A.; Yılmaz, S.

    2016-09-01

    Any tripartite state which saturates the strong subadditivity relation for the quantum entropy is defined as the Markov state. A tripartite pure state describing an open system, its environment, and their purifying system is a pure Markov state if and only if the bipartite marginal state of the purifying system and environment is a product state. It has been shown that as long as the purification of the input system-environment state is a pure Markov state, the reduced dynamics of the open system can be described, on the support of the initial system state, by a quantum channel for every joint unitary evolution of the system-environment composite even in the presence of initial correlations. Entanglement, discord, and classical correlations of the initial system-environment states implied by the pure Markov states are analyzed and it has been shown that all these correlations are entirely specified by the entropy of environment. Some implications concerning perfect quantum error correction procedure and quantum Markovian dynamics are presented.

  12. The Common Core State Standards Initiative: An Event History Analysis of State Adoption

    Science.gov (United States)

    LaVenia, Mark; Cohen-Vogel, Lora; Lang, Laura B.

    2015-01-01

    Today, with states' near-universal adoption of the Common Core State Standards, the political system has achieved that which was not possible less than 2 decades ago. Just why this is so remains unanswered. Some observers have attributed states' embrace of the standards to the substantial financial incentives that the federal government embedded…

  13. 44 CFR 350.8 - Initial FEMA action on State plan.

    Science.gov (United States)

    2010-10-01

    ... 44 Emergency Management and Assistance 1 2010-10-01 2010-10-01 false Initial FEMA action on State plan. 350.8 Section 350.8 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY... acknowledge in writing within ten days the receipt of the State application. (b) FEMA shall publish a...

  14. Extracting information about the initial state from the black hole radiation

    CERN Document Server

    Lochan, Kinjalk

    2015-01-01

    The crux of the black hole information paradox is related to the fact that the complete information about the initial state of a quantum field in a collapsing spacetime is not available to future asymptotic observers, belying the expectations from a unitary quantum theory. We study the imprints of the initial quantum state, contained in the distortions of the black hole radiation from the thermal spectrum, which can be detected by the asymptotic observers. We identify the class of in-states which can be fully reconstructed from the information contained in the distortions at the semiclassical level. Even for the general in-state, we can uncover a specific amount of information about the initial state. For a large class of initial states, some specific observables defined in the initial Hilbert space are completely determined from the resulting final spectrum. These results suggest that a \\textit{classical} collapse scenario ignores this richness of information in the resulting spectrum and a consistent quantu...

  15. Biaxial fatigue behavior of a powder metallurgical TRIP steel

    Directory of Open Access Journals (Sweden)

    S. Ackermann

    2015-10-01

    Full Text Available Multiaxial fatigue behavior is an important topic in critical structural components. In the present study the biaxial-planar fatigue behavior of a powder metallurgical TRIP steel (Transformation Induced Plasticity was studied by taking into account martensitic phase transformation and crack growth behavior. Biaxial cyclic deformation tests were carried out on a servo hydraulic biaxial tension-compression test rig using cruciform specimens. Different states of strain were studied by varying the strain ratio between the axial strain amplitudes in the range of -1 (shear loading to 1 (equibiaxial loading. The investigated loading conditions were proportional due to fixed directions of principal strains. The studied TRIP steel exhibits martensitic phase transformation from -austenite via ε-martensite into α‘- martensite which causes pronounced cyclic hardening. The α‘-martensite formation increased with increasing plastic strain amplitude. Shear loading promoted martensite formation and caused the highest α‘-martensite volume fractions at fatigue failure in comparison to uniaxial and other biaxial states of strain. Moreover, the fatigue lives of shear tests were higher than those of uniaxial and other biaxial tests. The von Mises equivalent strain hypothesis was found to be appropriate for uniaxial and biaxial fatigue, but too conservative for shear fatigue, according to literature for torsional fatigue. The COD strain amplitude which is based on crack opening displacement gave a better correlation of the investigated fatigue lives, especially those for shear loading. Different types of major cracks were observed on the sample surfaces after biaxial cyclic deformation by using electron monitoring in an electron beam universal system and scanning electron microscopy (SEM. Specimens with strain ratios of 1, 0.5, -0.1 and -0.5 showed mode I major cracks (perpendicular to the axis of maximum principal strain. Major cracks after shear fatigue

  16. The impact of production capacity utilization on metallurgical companies financing

    Directory of Open Access Journals (Sweden)

    J. Kutáč

    2013-01-01

    Full Text Available The most important and the most problematic in-house sources of financing of metallurgical companies are profit and depreciations. In the event that the aggregate value of the economic result and depreciations goes over to negative values, then this kind of in-house financing ceases to increase Cash Flow of the company but, on the contrary, it will cause its reduction. It means that this type of financing is to some extent uncertain, particularly in times of crisis, when there are noticeable fluctuations in sales volumes, leading to a significant influence of the volume of production on the amount of profit. The article discusses the impact of production capacity utilization on metallurgical companies financing.

  17. Efficiency of Polish metallurgical industry based on data envelopment analysis

    Directory of Open Access Journals (Sweden)

    J. Baran

    2016-04-01

    Full Text Available The main purpose of this paper is to compare the technical efficiency of 12 sectors manufacturing basic metals and metal products in Poland. This article presents the use of Data Envelopment Analysis models, to determine overall technical efficiency, pure technical efficiency and scale efficiency of metallurgical branches in Poland. The average technical efficiency of metallurgical industry in Poland was quite high. The analysis gives a possibility to create a ranking of sectors. Three branches were found to be fully efficient: manufacture of basic iron and steel and of ferroalloys, manufacture of basic precious and other non - ferrous metals and manufacture of tubes, pipes, hollow profiles and related fittings, of steel. The results point out the reasons of the inefficiency and provide improving directions for the inefficient sectors.

  18. Bankruptcy risk forecasting for the metallurgical branch in Romania

    Directory of Open Access Journals (Sweden)

    P. R. Răchişan

    2014-07-01

    Full Text Available All investment decisions require a thorough analysis of the retrospective evolution of the entities from the concerned area, in order to estimate the long-term evolution perspectives. In this context, the present study analyzes the evolution of the entities from the Romanian metallurgical sector based on the accounting and financial information published for the period 2008 - 2012 and, in fact, it justifies the situation from the perspective of users (managers, investors, auditors and of the economic environment specific to Romania. Starting from this premise we created a regression model particularly useful in forecasting the evolution of the ability to deal with debt for the entities from the Romanian metallurgical sector.

  19. Multicrystalline silicon wafers prepared from upgraded metallurgical feedstock

    Energy Technology Data Exchange (ETDEWEB)

    Degoulange, J.; Trassy, C. [SIMAP UMR CNRS, INP Grenoble (France); Perichaud, I.; Martinuzzi, S. [TECSEN UMR CNRS-University Paul Cezanne-Aix, Marseille III (France)

    2008-10-15

    A solution to the problem of the shortage of silicon feedstock used to grow multicrystalline ingots can be the production of a feedstock obtained by the direct purification of upgraded metallurgical silicon by means of a plasma torch. It is found that the dopant concentrations in the material manufactured following this metallurgical route are in the 10{sup 17} cm{sup -3} range. Minority carrier diffusion lengths L{sub n} are close to 35 {mu}m in the raw wafers and increases up to 120 {mu}m after the wafers go through the standard processing steps needed to make solar cells: phosphorus diffusion, aluminium-silicon alloying and hydrogenation by deposition of a hydrogen-rich silicon nitride layer followed by an annealing. L{sub n} values are limited by the presence of residual metallic impurities, mainly slow diffusers like aluminium, and also by the high doping level. (author)

  20. Prediction of Metallurgic Quality of ICDP Material before Tapping

    Science.gov (United States)

    Valek, Tomas; Hampl, Jiri

    ICDP (Indefinite Child Double Pour) irons designated for working layer of centrifugal rolls of rolling mill must have precisely defined properties. The monitored parameters of the ICDP irons are: chemical composition, the amount of graphite in a microstructure and hardness of base metal material. Precipitation of graphite in ICDP iron with ledeburitic basic metal compound is a complex process that can be controlled and managed with the usage of thermal analysis. On the basis of the evaluation of cooling curve parameters of ICDP iron there is performed metallurgical adjustment of melting by adding elements supporting graphite or carbide formation into ICDP iron. The identified structural and mechanical properties of ICDP irons were correlated with recorded cooling curve. Subsequently, a methodology for control of the metallurgical adjustment of ICDP iron before tapping and pouring was proposed to ensure the desired microstructure and properties the ICDP iron

  1. Elaboration and characterization of metallurgical silicon for photovoltaic applications

    Science.gov (United States)

    Barbouche, M.; Hajji, M.; Krout, F.; Ezzaouia, H.

    2015-04-01

    There is a small quantity of participants in the global market of silicon, mainly from the developed countries. It should be noticed also that production of metallurgical silicon Mg-Si is among the most important steps to produce solar grade silicon and photovoltaic panels. Therefore, in this paper we focused on the growth of Mg-Si by carbothermal reduction of silica. An investigation was made using FT-IR characterization to study the effect of process conditions (temperature, atmosphere, duration) in Mg-Si production. Raman spectroscopy was used to investigate the produced Mg-Si. Based on these results, we established a pilot line production of metallurgical silicon at the "CRTEn" in Tunisia.

  2. Calculations of the thermodynamic properties of metallurgical solutions

    Science.gov (United States)

    Blander, Milton

    Predictive theories for metallurgical solutions are important precursors for computer software in chemical and extractive metallurgy. A limited selection of concepts useful for slags and other ionic systems will be discussed, and include the quasichemical theory, the conformal ionic solution theory, and polymer theory. We emphasize theories which usefully predict solution properties of multicomponent ionic systems, such as silicates and molten salts, to illustrate the range of possible uses.

  3. Thermo-ecological cost (TEC evaluation of metallurgical processes

    Directory of Open Access Journals (Sweden)

    W. Stanek

    2015-01-01

    Full Text Available Metallurgy represents a complex production system of fuel and mineral non-renewable resources transformation. The effectiveness of resource management in metallurgical chains depends on the applied ore grade and on the irreversibility of components of the system. TEC can be applied to measure the influence of metallurgy on the depletion of natural resources. The paper discusses the possibility of application of TEC in metallurgy and presents illustrative example concerning blast-furnace process.

  4. Environment-friendly management of iron-bearing metallurgical waste

    OpenAIRE

    K. Nowacki; T. Lis; Kania, H.

    2017-01-01

    The main purpose of waste management should be reclamation of valuable raw materials and, consequently, protection of natural environment by reducing consumption of deposits and energy. The metallurgical industry generates considerable quantities of waste containing iron. This article addresses environment-friendly solutions for utilisation of such waste in the form of slime, sludge and dust. What has been discussed is the impact of the technologies proposed on natural environment.

  5. Inventory management in a metallurgical of the automotive industry

    OpenAIRE

    Marcos Antonio Maia de Oliveira; Maiara Maria da Silva; Winston Aparecido Andrade; Alexandre Formigoni

    2015-01-01

    This article aims to analyze the importance of inventory management in a metallurgical company, located in Santo André city, in Grande São Paulo, since the inventory management is crucial within a company that wants to survive nowadays, by studying the main features and trends in the methods used for inventory control. In this case study the basic concepts for good control were considered, showing tools currently used in the market, providing data for material purchase, sales control, parts i...

  6. SECI model and facilitation in change management in metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    K. Grzybowska

    2013-04-01

    Full Text Available Organisational change management is not efficient without gaining and sharing knowledge by the members of the enterprise. Both in the conditions of relative organisational stability and in organisational chaos resulting from dynamic introduction and management of changes there is a constant need of improvement and of shaping competences and distribution of knowledge in the enterprise. The publication presents key programs of building knowledge conducted in a metallurgical enterprise.

  7. Concentration on knowledge and change management at metallurgical company

    Directory of Open Access Journals (Sweden)

    Gajdzik, B.

    2008-04-01

    Full Text Available The subject of this paper is an analysis of one of the most crucial aspects of the contemporary business, which is knowledge and change management. Competition on the market is more and more stronger. Knowledge is one of the most precious business resources, it lets companies be more competitive because knowledge inspires to changes. The paper contains examples of knowledge and change management, faced by the largest metallurgical company on the Polish market – Arcelor Mittal.

  8. Management of corrective and preventive actions at a metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    O. R. Zuboyarov

    2010-12-01

    Full Text Available By the example of the Nizhny Novgorod enterprise Spetsstal, LLC, the process of planning and taking corrective and preventive actions to eliminate and prevent irrelevance of the metallurgical production and the processes of the quality management system of the enterprise is considered in the paper. Scientific novelty is in the mentioned stages of organization and implementation of the corrective actions and stages of analysis of the considered potential irrelevance.

  9. 77 FR 71344 - Texas: Final Authorization of State-initiated Changes and Incorporation by Reference of State...

    Science.gov (United States)

    2012-11-30

    ... pollution control, Water supply. Authority: This rule is issued under the authority of Sections 2002(a...) Texas Water Code (TWC), Texas Codes Annotated, as amended effective September 1, 2009: Chapter 5... AGENCY 40 CFR Parts 271 and 272 Texas: Final Authorization of State-initiated Changes and...

  10. Characterization of Tool Wear in High-Speed Milling of Hardened Powder Metallurgical Steels

    Directory of Open Access Journals (Sweden)

    Fritz Klocke

    2011-01-01

    Full Text Available In this experimental study, the cutting performance of ball-end mills in high-speed dry-hard milling of powder metallurgical steels was investigated. The cutting performance of the milling tools was mainly evaluated in terms of cutting length, tool wear, and cutting forces. Two different types of hardened steels were machined, the cold working steel HS 4-2-4 PM (K490 Microclean/66 HRC and the high speed steel HS 6-5-3 PM (S790 Microclean/64 HRC. The milling tests were performed at effective cutting speeds of 225, 300, and 400 m/min with a four fluted solid carbide ball-end mill (0 = 6, TiAlN coating. It was observed that by means of analytically optimised chipping parameters and increased cutting speed, the tool life can be drastically enhanced. Further, in machining the harder material HS 4-2-4 PM, the tool life is up to three times in regard to the less harder material HS 6-5-3 PM. Thus, it can be assumed that not only the hardness of the material to be machined plays a vital role for the high-speed dry-hard cutting performance, but also the microstructure and thermal characteristics of the investigated powder metallurgical steels in their hardened state.

  11. Chimera states and the interplay between initial conditions and non-local coupling

    Science.gov (United States)

    Kalle, Peter; Sawicki, Jakub; Zakharova, Anna; Schöll, Eckehard

    2017-03-01

    Chimera states are complex spatio-temporal patterns that consist of coexisting domains of coherent and incoherent dynamics. We study chimera states in a network of non-locally coupled Stuart-Landau oscillators. We investigate the impact of initial conditions in combination with non-local coupling. Based on an analytical argument, we show how the coupling phase and the coupling strength are linked to the occurrence of chimera states, flipped profiles of the mean phase velocity, and the transition from a phase- to an amplitude-mediated chimera state.

  12. Solid Reference Electrode of Metallurgical Oxygen Sensor

    Institute of Scientific and Technical Information of China (English)

    LOU Tian-jun; KONG Xiang-hua; HUANG Ke-qin; LIU Qing-guo

    2006-01-01

    The thermal equilibrium state of the reference electrode was investigated. The results show that the temperature difference between the inside and the outside of zirconia tube was very small and the Seebeck effect can be ignored after the sensor was dipped into liquid steel for more than 2 s. A special sensor was designed to test the relation between the EMF (electromotive force) of sensor and the thermal equilibrium state of the reference electrode. Based on these results, it is suggested that the peak in EMF curve was caused by the change of oxygen potential in reference electrode before the thermal equilibrium was reached. If NiO was added by 2%-5% to the Cr/Cr2O3 reference electrode, the peak in EMF curve could be eliminated.

  13. Environment and initial state engineered dynamics of quantum and classical correlations

    Science.gov (United States)

    Wang, Cheng-Zhi; Li, Chun-Xian; Guo, Yu; Lu, Geng-Biao; Ding, Kai-He

    2016-11-01

    Based on an open exactly solvable system coupled to an environment with nontrivial spectral density, we connect the features of quantum and classical correlations with some features of the environment, initial states of the system, and the presence of initial system-environment correlations. Some interesting features not revealed before are observed by changing the structure of environment, the initial states of system, and the presence of initial system-environment correlations. The main results are as follows. (1) Quantum correlations exhibit temporary freezing and permanent freezing even at high temperature of the environment, for which the necessary and sufficient conditions are given by three propositions. (2) Quantum correlations display a transition from temporary freezing to permanent freezing by changing the structure of environment. (3) Quantum correlations can be enhanced all the time, for which the condition is put forward. (4) The one-to-one dependency relationship between all kinds of dynamic behaviors of quantum correlations and the initial states of the system as well as environment structure is established. (5) In the presence of initial system-environment correlations, quantum correlations under local environment exhibit temporary multi-freezing phenomenon. While under global environment they oscillate, revive, and damp, an explanation for which is given.

  14. A Case Study of the Librarian-Initiated Publications Discovery Activities in State Level Digital Depositories in the United States

    Directory of Open Access Journals (Sweden)

    Chi-Shiou Lin

    2008-12-01

    Full Text Available This article describes the novel phenomenon of librarian-initiated publications discovery (LIPD in state-level digital depositories in the United States. LIPD is a series of actions taken by digital depository librarians to discover and inspect government Web sites and select Web content qualifying as government publications for inclusion in the state depositories. In a current popular model in which states employ OCLC Digital Archive™ for the depositories, the power of content selection has shifted from government agencies (content producers to digital depositories. This study systematically documented and compared the LIPD actions in four case states and developed a LIPD process model for descriptive and analytic purposes. It also discusses the impacts and challenges facing the changing practices in preserving government information as historical record. [Article content in Chinese

  15. Extracting Information about the Initial State from the Black Hole Radiation.

    Science.gov (United States)

    Lochan, Kinjalk; Padmanabhan, T

    2016-02-05

    The crux of the black hole information paradox is related to the fact that the complete information about the initial state of a quantum field in a collapsing spacetime is not available to future asymptotic observers, belying the expectations from a unitary quantum theory. We study the imprints of the initial quantum state contained in a specific class of distortions of the black hole radiation and identify the classes of in states that can be partially or fully reconstructed from the information contained within. Even for the general in state, we can uncover some specific information. These results suggest that a classical collapse scenario ignores this richness of information in the resulting spectrum and a consistent quantum treatment of the entire collapse process might allow us to retrieve much more information from the spectrum of the final radiation.

  16. Metallurgical optimisation of PM superalloy N19

    Directory of Open Access Journals (Sweden)

    Locq Didier

    2014-01-01

    Full Text Available Microstructures of the new PM superalloy N19 have been investigated for various heat treatments in order to reach the best compromise between static strength and cyclic resistance. One subsolvus and several supersolvus heat treatments were applied to produce fine (7 μm and medium (25 μm grain sizes, respectively. The alloy is shown to be quite sensitive to the cooling conditions after solutioning as the γ′ hardening precipitates, both secondary and tertiary, have a direct influence on mechanical properties. Two cooling conditions after solutioning produce a high crack propagation resistance at 650 °C with dwell time cycles, which is one of the basic requirements. The low cycle fatigue behaviour appears to be correlated to the grain size, which determines the origin of crack initiation (from ceramic inclusions or not. The other mechanical properties (tensile, creep remain above target levels. Despite the medium size grain microstructure in the supersolvus condition, a high level of mechanical strength is observed in N19 at elevated temperature. It is understood that further improvement in properties can be achieved by developing coarse grain microstructures.

  17. Initial system-bath state via the maximum-entropy principle

    Science.gov (United States)

    Dai, Jibo; Len, Yink Loong; Ng, Hui Khoon

    2016-11-01

    The initial state of a system-bath composite is needed as the input for prediction from any quantum evolution equation to describe subsequent system-only reduced dynamics or the noise on the system from joint evolution of the system and the bath. The conventional wisdom is to write down an uncorrelated state as if the system and the bath were prepared in the absence of each other; yet, such a factorized state cannot be the exact description in the presence of system-bath interactions. Here, we show how to go beyond the simplistic factorized-state prescription using ideas from quantum tomography: We employ the maximum-entropy principle to deduce an initial system-bath state consistent with the available information. For the generic case of weak interactions, we obtain an explicit formula for the correction to the factorized state. Such a state turns out to have little correlation between the system and the bath, which we can quantify using our formula. This has implications, in particular, on the subject of subsequent non-completely positive dynamics of the system. Deviation from predictions based on such an almost uncorrelated state is indicative of accidental control of hidden degrees of freedom in the bath.

  18. An analysis of the causes of complaintsabout steel sheets in metallurgical product quality management systems

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2014-01-01

    Full Text Available The publication presents the causes of complaints about metallurgical products, illustrated with an example of steel sheets, with a particular focus on the reasons having their source in the human factor. The publication has been based on direct research and analysis of complaints made available by a metallurgical plant. The obtained results have been enriched with theoretical considerations on quality management systems for metallurgical products.

  19. Metallurgical Design and Development of NASA Crawler/Transporter Tread Belt Shoe Castings

    Science.gov (United States)

    Parker, Donald S.

    2006-01-01

    The NASA Crawler/Transporters (CT-1 and CT-2) used to transport the Space Shuffles are one of the largest tracked vehicles in existence today. Two of these machines have been used to move space flight vehicles at Kennedy Space Center since the Apollo missions of the 1960's and relatively few modifications have been made to keep them operational. In September of 2003 during normal Crawler/Transporter operations cracks were observed along the roller pad surfaces of several tread belt shoes. Further examination showed 20 cracked shoes on CT-1 and 40 cracked shoes on CT-2 and a formal failure analysis investigation was undertaken while the cracked shoes were replaced. Six shoes were cross-sectioned with the fracture surfaces exposed and it was determined that the cracks were due to fatigue that initiated on the internal casting web channels at pre-existing casting defects and propagated through thickness both transgranularly and intergranularly between internal shrinkage cavities, porosity, and along austenitic and ferritic grain boundaries. The original shoes were cast during the 1960's using a modified 861330 steel with slightly higher levels of chromium, nickel and molybdenum followed by heat treatment to achieve a minimum tensile strength of 11 Oksi. Subsequent metallurgical analysis of the tread belt shoes after multiple failures showed excessive internal defects, alloy segregation, a nonuniform ferritic/ bainitic/martensitic microstructure, and low average tensile properties indicative of poor casting and poor heat-treatment. As a result, NASA funded an initiative to replace all of the tread belt shoes on both crawler/transporters along with a redesign of the alloy, manufacturing, and heat-treatment to create a homogeneous cast structure with uniform mechanical and metallurgical properties. ME Global, a wholly owned subsidiary of ME Elecmetal based in Minneapolis, MN was selected as manufacturing and design partner to develop the new shoes and this paper

  20. A Discussion of Change Theory, System Theory, and State Designed Standards and Accountability Initiatives.

    Science.gov (United States)

    McNeal, Larry; Christy, W. Keith

    This brief paper is a presentation that preceeded another case of considering the ongoing dialogue on the advantages and disadvantages of centralized and decentralized school-improvement processes. It attempts to raise a number of questions about the relationship between state-designed standards and accountability initiatives and change and…

  1. Scanning of hadron cross-section at DAPHNE by analysis of initial-state radiative events

    CERN Document Server

    Konchatnij, M I

    1999-01-01

    The initial-state radiative events in electron-positron annihilation into hadrons at DAPHNE have been considered. The coresponding cross-section with the full first order radiative correction has been calculated. The analytical calculations take into account the realistic angular acceptance and energy cut of DAPHNE photon detector.

  2. Students' Initial Knowledge State and Test Design: Towards a Valid and Reliable Test Instrument

    Science.gov (United States)

    CoPo, Antonio Roland I.

    2015-01-01

    Designing a good test instrument involves specifications, test construction, validation, try-out, analysis and revision. The initial knowledge state of forty (40) tertiary students enrolled in Business Statistics course was determined and the same test instrument undergoes validation. The designed test instrument did not only reveal the baseline…

  3. An algebraic approach to local observability at an initial state for discrete-time polynomial systems

    NARCIS (Netherlands)

    Kawano, Yu; Ohtsuka, Toshiyuki

    2011-01-01

    In this paper, we consider local observability at an initial state for discrete-time autonomous polynomial systems. When testing for observability, for discrete-time nonlinear systems, a condition based on the inverse function theorem is commonly used. However, it is a sufficient condition. In this

  4. What Variables Condition Syntactic Transfer? A Look at the L3 Initial State

    Science.gov (United States)

    Rothman, Jason; Cabrelli Amaro, Jennifer

    2010-01-01

    This study investigates transfer at the third-language (L3) initial state, testing between the following possibilities: (1) the first language (L1) transfer hypothesis (an L1 effect for all adult acquisition), (2) the second language (L2) transfer hypothesis, where the L2 blocks L1 transfer (often referred to in the recent literature as the "L2…

  5. Excitation energy transfer in light-harvesting system: Effect of initial state

    CERN Document Server

    Cui, B; Oh, C H

    2012-01-01

    The light-harvesting is a problem of long interest. It becomes active again in recent years stimulated by suggestions of quantum effects in energy transport. Recent experiments found evidence that BChla 1 and BChla 6 are the first to be excited in the Fenna-Matthews-Olson(FMO) protein, theoretical studies, however, are mostly restricted to consider the exciton in BChla 1 initially. In this paper, we study the energy transport in the FMO complex by taking different initial states into account. Optimizations are performed for the decoherence rates as to maximal transport efficiency. Dependence of the energy transfer efficiency on the initial states is given and discussed. Effects of fluctuations in the site energies and couplings are also examined.

  6. Modelling stellar jets with magnetospheres using as initial states analytical MHD solutions

    CERN Document Server

    Todorov, P; Cayatte, V; Sauty, C; Lima, J J G; Tsinganos, K

    2016-01-01

    In this paper we focus on the construction of stellar outflow models emerging from a polar coronal hole-type region surrounded by a magnetosphere in the equatorial regions during phases of quiescent accretion. The models are based on initial analytical solutions. We adopt a meridionally self-similar solution of the time-independent and axisymmetric MHD equations which describes effectively a jet originating from the corona of a star. We modify appropriately this solution in order to incorporate a physically consistent stellar magnetosphere. We find that the closed fieldline region may exhibit different behaviour depending on the associated boundary conditions and the distribution of the heat flux. However, the stellar jet in all final equilibrium states is very similar to the analytical one prescribed in the initial conditions. When the initial net heat flux is maintained, the magnetosphere takes the form of a dynamical helmet streamer with a quasi steady state slow magnetospheric wind. With no heat flux, a s...

  7. Metallurgical and Mechanical Evaluation of 4340 Steel Produced by Direct Metal Laser Sintering

    Science.gov (United States)

    Jelis, Elias; Clemente, Matthew; Kerwien, Stacey; Ravindra, Nuggehalli M.; Hespos, Michael R.

    2015-03-01

    Direct metal laser sintering (DMLS) was used to produce high-strength low-alloy 4340 steel specimens. Mechanical and metallurgical analyses were performed on the specimens to determine the samples with the highest strengths and the least porosity. The optimal process parameters were thus defined based on the corresponding experimental conditions. Additionally, the effects of fabricating specimens with both virgin and recycled powders were studied. Scanning electron microscopy and electron-dispersive spectroscopy were performed on both types of powders to determine the starting morphology and composition. The initial tensile results are promising, suggesting that DMLS can produce specimens equal in strength to wrought materials. However, there is evidence of cracking on several of the heat-treated tensile specimens that is unexplained. Several theories point to disturbances in the build chamber environment that went undetected while the specimens were being fabricated.

  8. Mechanical and metallurgical properties of carotid artery clamps.

    Science.gov (United States)

    Dujovny, M; Kossovsky, N; Kossowsky, R; Segal, R; Diaz, F G; Kaufman, H; Perlin, A; Cook, E E

    1985-11-01

    The mechanical and metallurgical properties of carotid artery clamps were evaluated. The pressure plate retreat propensity, metallurgical composition, surface morphology, magnetic properties, and corrosion resistance of the Crutchfield, Selverstone, Salibi, and Kindt clamps were tested. None of the clamps showed evidence of pressure plate retreat. The clamps differed significantly in their composition, surface cleanliness, magnetic properties, and corrosion resistance. The Crutchfield clamp was the only one manufactured from an ASTM-ANSI-approved implantable stainless steel (AISI 316) and the only clamp in which the surfaces were clean and free of debris. The Selverstone clamp was made principally from AISI 304 stainless steel, as was one Salibi clamp. The pressure plate on another Salibi clamp was made from a 1% chromium and 1% manganese steel. Machining and surface debris consisting principally of aluminum, silicon, and sulfur was abundant on the Selverstone and Salibi clamps. The Kindt clamp was manufactured from AISI 301 stainless steel with a silicate-aluminized outer coating. The Crutchfield and Selverstone clamps were essentially nonferromagnetic, whereas the Salibi and Kindt clamps were sensitive to magnetic flux. In the pitting potential corrosion test, the Crutchfield clamp demonstrated good corrosion resistance with a pitting potential of 310 mV and no surface corrosion or pitting by scanning electron microscopy examination. The Selverstone clamp had lower pitting potentials and showed various degrees of corrosion and surface pitting by scanning electron microscopy. The Salibi pressure plate had a very low pitting potential of -525 mV and showed severe corrosion. By metallurgical criteria, only the Crutchfield clamp is suitable for long term implantation.

  9. Washington state initiative trims Medicaid budget, ED utilization without denying access.

    Science.gov (United States)

    2014-06-01

    In its first year of operation, Washington state's "ER is for Emergencies" initiative has helped to save the state's Medicaid budget $33.6 million. The initiative, which is based on the implementation of seven best practices, has succeeded in part by improving care coordination and by linking EDs across the state so information can be shared electronically. Leaders of the effort concede that while state pressure was essential in pushing providers to address excess use of the ED for nonemergency needs, they stress that the approach worked because all sides were willing to sit down and hammer out a solution. Further, they note that the infrastructure is now in place to address other problems in a similar fashion. An analysis of claims data shows that in the first year of the initiative, ED visits by Medicaid recipients declined by 9.9%, and the rate of visits by frequent ED utilizers declined by 10.7%. The analysis also shows that ED visits resulting in a scheduled drug prescription fell by 24%, and the rate of visits for a low-acuity diagnosis declined by 14.2%. While many EDs had to adjust their staffing and other resources to accommodate reduced volumes, others experienced few changes or even saw an uptick in volume, possibly from implementation of the Affordable Care Act. Leaders of the effort say the biggest challenge involved with implementing the initiative was securing administrative buy-in for investments that would likely result in improved efficiency and care, but also reduced revenue--at least initially.

  10. Some results of medical researches at Ulba Metallurgical Plant

    Energy Technology Data Exchange (ETDEWEB)

    Artemieva, G.I.; Novikov, V.G.; Savchuk, V.V. [Ulba Metallurgical Plant, Ust-Kamenogorsk (Kazakhstan)

    1998-01-01

    The results of 45-years medical researches at beryllium production of Ulba Metallurgical Plant are summarized in this report. Statistic data on different kinds of occupational diseases, related to beryllium production and the dynamics of changing occupational diseases with the development of beryllium production, are given there. Data on average duration of life of occupational disease patients are presented in the report. It includes the description of problems, related to berylliosis diagnosis. Issues, connected to beryllium production effect on health of man, located nearby beryllium production are also discussed there as well. (author)

  11. Growth of silicon sheets from metallurgical-grade silicon

    Science.gov (United States)

    Ciszek, T.; Schietzelt, M.; Kazmerski, L. L.; Hurd, J. L.; Fernelius, B.

    1981-05-01

    Impure silicon is difficult to solidify in sheet form because of morphological proturberances which may result from constitutional supercooling. Sheet growth methods which require a specific crystallographic orientation or which are characterized by a narrow melt meniscus are most affected by this problem. The edge-supported pulling technique was applied to sheet growth of metallurgical grade silicon and DAR (Direct Arc Reactor) silicon. The 7 mm meniscus height associated with this technique allowed the growth of 5 cm wide sheets from both materials. In each case, the sheets were p-type.

  12. Assessment of environmental aspects in a metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2012-10-01

    Full Text Available The publication characterises the quantity and quality methods applied in the assessment of the environmental aspects. The method of cumulated environmental loads is particularly interesting, where the network of process connections within an enterprise and between it and the surrounding (the co-operation of the enterprise with the suppliers of resources and materials, the networks of energy resources and distributors of products or other contributors in the chain of added value. The paper finishes with an example presenting the methodological assessment of the environmental aspects in the metallurgical enterprise.

  13. ECONOMIC POLICY OF METALLURGICAL ENTERPRISE IN THE FIELD OF CONSERVANCY

    Directory of Open Access Journals (Sweden)

    A.G. Rudoy

    2009-06-01

    Full Text Available Ecological situation about one of leading enterprises of Russia - “Sredneuralsk copper-smelting works» joint-stock company as a member of Urals mining-metallurgical holding company is considered. Man-caused bursts and pollutions from enterprise functioning extend for long distances and cause global environment damages. Yielding to pressure of public opinion the leadership of holding company come to determination of forming a new culture of management based on principles of reduction and prevention of negative influence of the enterprise on the environment.

  14. The 6th European metallurgical conference EMC 2011: Proceedings review

    Directory of Open Access Journals (Sweden)

    Srećko R. Stopić

    2011-10-01

    Full Text Available The GDMB Society for Mining, Metallurgy, Resource and Environmental Technology organized the 6th European Metallurgical Conference (2011 in Duesseldorf from June 26 to 29, 2011. The same venue hosted the most important international metallurgical trade fairs for metallurgy of iron and steel, new casting and thermochemical processes METEC, GIFA, THERMOPROCESS and NEWCAST. The previous European metallurgical conferences were organized by GDMB in Friedrichshafen (2001, Hanover (2003, Leipzig (2005, Duesseldorf (2007, Innsbruck (2009. The GDMB is a non-profit organization situated in Clausthal in Germany, which is related to combining science with the practical experience in metallurgy, mining, materials engineering, mineral processing, recycling and refining of metals, and manufacturing of semi- and finishing products. The European Metallurgical conference EMC is one of the most known conferences worldwide in the field of non-ferrous metallurgy and is attended regularly by the decision makers from the industry and universities. The scientific program contained 6 plenary lectures and more than 160 presentations from 40 countries in 5 parallel series. An extensive poster exhibition was held, during which the authors had an opportunity to introduce their posters to the entire plenum as a part of a brief presentation. The best poster from the Montan-University in Leoben, Austria, was awarded the € 500 'Poster Award EMC 2011'. Not only were the most important European countries represented here, more than one third of the lecturers were from the non-European countries (Canada, Japan, China, USA, South Africa, Australia. The origin of the participants reflects the aim of the organizers: to make this conference a worldwide platform for the scientific exchange of experience and information. More than 400 participants from all over the world participated at this conference. The scientific presentations of the conference are presented in five Proceedings

  15. Arsenic precipitation from metallurgical effluents; Precipitacion de arsenico desde efluentes metalurgicos

    Energy Technology Data Exchange (ETDEWEB)

    Navarro, P.; Vargas, C.; Araya, E.; Martin, I.; Alguacil, F. J.

    2004-07-01

    In the mining-metallurgical companies different liquid effluents are produced, which can contain a series of dissolved elements that are considered dangerous from an environmental point of view. One of these elements is the arsenic, especially in the state of oxidation +5 that can be precipitated as calcium or iron arsenate. To fulfil the environmental requests it should have in solution a content of arsenic lower than 0,5 mg/l and the obtained solid product should be very stable under the condition in which it will be stored. this work looks for the best conditions of arsenic precipitation, until achieving contents in solution lower than such mentioned concentration. Also, the stability of the precipitates was studied. (Author) 7 refs.

  16. Influence of flow control devices on metallurgical effects in a large-capacity tundish

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The influence of flow control devices on metallurgical effects in a large-capacity tundish has been studied carefully with elements tracing, sampling and theoretical prospecting. The results from the studies are (1) in the continuous casting of clean steel, bad control of tundish operation may deteriorate the cleanliness of steel; (2) the cleanliness of steel is deteriorated mainly at the unsteady state; (3) large amount of macro inclusions come from the top slag and the refractory of tundish; (4) installing dam and weir can improve the cleanliness of steel and lighten the influence of steel fluctuation; and (5) the result of theoretical calculation suggests that the inclusions larger than the critical size of 92.6 μm can be floated out from the tundish bath completely.

  17. Value added statement (VAS of mining and metallurgical companies in Poland

    Directory of Open Access Journals (Sweden)

    A. Kijewska

    2015-10-01

    Full Text Available The article presents the concept of value added and value added statement. That report may provide an additional source of information for the company’s stakeholders such as employees, capital donors, State Budget and the company itself. According to the theory of stakeholders and corporate social responsibility the objective of the company is to deliver value to all stakeholders, not just shareholders. Hence the need for disclosure of information about the value added generated for all stakeholders. For internal analysis and for comparison purposes, several indicators based on value added should be elaborated. Calculations were carried out on the example of two Polish companies of the metallurgical and mining sectors for the years 2011-2013. This allowed for the evaluation of these two companies, to show the differences in the distribution of value added for stakeholders and evaluation of selected indicators.

  18. Coated graphite articles useful in metallurgical processes and method for making same

    Science.gov (United States)

    Holcombe, Cressie E.; Bird, Eugene L.

    1995-01-01

    Graphite articles including crucibles and molds used in metallurgical processes involving the melting and the handling of molten metals and alloys that are reactive with carbon when in a molten state and at process temperatures up to about 2000.degree. C. are provided with a multiple-layer coating for inhibiting carbon diffusion from the graphite into the molten metal or alloys. The coating is provided by a first coating increment of a carbide-forming metal on selected surfaces of the graphite, a second coating increment of a carbide forming metal and a refractory metal oxide, and a third coating increment of a refractory metal oxide. The second coating increment provides thermal shock absorbing characteristics to prevent delamination of the coating during temperature cycling. A wash coat of unstabilized zirconia or titanium nitride can be applied onto the third coating increment to facilitate release of melts from the coating.

  19. Serotonin and the neuropeptide PDF initiate and extend opposing behavioral states in C. elegans.

    Science.gov (United States)

    Flavell, Steven W; Pokala, Navin; Macosko, Evan Z; Albrecht, Dirk R; Larsch, Johannes; Bargmann, Cornelia I

    2013-08-29

    Foraging animals have distinct exploration and exploitation behaviors that are organized into discrete behavioral states. Here, we characterize a neuromodulatory circuit that generates long-lasting roaming and dwelling states in Caenorhabditis elegans. We find that two opposing neuromodulators, serotonin and the neuropeptide pigment dispersing factor (PDF), each initiate and extend one behavioral state. Serotonin promotes dwelling states through the MOD-1 serotonin-gated chloride channel. The spontaneous activity of serotonergic neurons correlates with dwelling behavior, and optogenetic modulation of the critical MOD-1-expressing targets induces prolonged dwelling states. PDF promotes roaming states through a Gαs-coupled PDF receptor; optogenetic activation of cAMP production in PDF receptor-expressing cells induces prolonged roaming states. The neurons that produce and respond to each neuromodulator form a distributed circuit orthogonal to the classical wiring diagram, with several essential neurons that express each molecule. The slow temporal dynamics of this neuromodulatory circuit supplement fast motor circuits to organize long-lasting behavioral states. Copyright © 2013 Elsevier Inc. All rights reserved.

  20. Using vibrational branching ratios to probe initial and final state effects in molecular photoionization

    Energy Technology Data Exchange (ETDEWEB)

    Lucchese, Robert R [Department of Chemistry, Texas A and M University, College Station, TX 77843-3255 (United States); Bozek, John D [Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA 94025 (United States); Das, Aloke [Indian Institute of Science Education and Research, Pune, Maharashtra 411008 (India); Poliakoff, E D, E-mail: lucchese@mail.chem.tamu.ed [Department of Chemistry, Louisiana State University, Baton Rouge, LA 70803 (United States)

    2009-11-01

    Recent computed and experimental results for ICN, BF{sub 3} and C{sub 6}F{sub 6} will be presented. In ICN we consider the ionization leading to the X{sup 2} {Pi}{sub 1/2,3/2} states of ICN{sup +}. We show how the geometry dependence of the initial state orbital can be studied using vibrational branching ratios. In C{sub 6}F{sub 6}, we consider the excitation of the effects of two prominent shape resonances on the symmetric stretching modes in the photoionization leading to the C {sup 3}B{sub 2u} state of the ion. In BF{sub 3}, the excitation of both the symmetric stretching and the degenerate asymmetric stretching modes are considered in the photoionization leading to the E{sup 2}A{sub 1}' state of the ion.

  1. Short distance and initial state effects in inflation: stress tensor and decoherence

    CERN Document Server

    Anderson, P R; Mottola, E; Anderson, Paul R.; Molina-Paris, Carmen; Mottola, Emil

    2005-01-01

    We present a consistent low energy effective field theory framework for parameterizing the effects of novel short distance physics in inflation, and their possible observational signatures in the Cosmic Microwave Background. We consider the class of general homogeneous, isotropic initial states for quantum scalar fields in Robertson-Walker (RW) spacetimes, subject to the requirement that their ultraviolet behavior be consistent with renormalizability of the covariantly conserved stress-energy tensor which couples to gravity. In the functional Schrodinger picture such states are coherent, squeezed, mixed states characterized by a Gaussian density matrix. This Gaussian has parameters which approach those of the adiabatic vacuum at large wave number, and evolve in time according to an effective classical Hamiltonian. The one complex parameter family of $\\alpha$ squeezed states in de Sitter spacetime does not fall into this UV allowed class, except for the special value of the parameter corresponding to the Bunch...

  2. KaTie: for parton-level event generation with k_T-dependent initial states

    CERN Document Server

    van Hameren, A

    2016-01-01

    KaTie is a parton-level event generator for hadron scattering processes that can deal with partonic initial-state momenta with an explicit transverse momentum dependence causing them to be space-like. Provided with the necessary transverse momentum dependent parton density functions, it calculates the off-shell matrix elements and performs the phase space importance sampling to produce weighted events, for example in the Les Houches Event File format. It can deal with arbitrary processes within the Standard Model, for up to four final-state particles and beyond. Furthermore, it can produce events for single-parton scattering as well as for multi-parton scattering.

  3. Robustness measure of hybrid intra-particle entanglement, discord, and classical correlation with initial Werner state

    Science.gov (United States)

    Saha, P.; Sarkar, D.

    2016-02-01

    Quantum information processing is largely dependent on the robustness of non-classical correlations, such as entanglement and quantum discord. However, all the realistic quantum systems are thermodynamically open and lose their coherence with time through environmental interaction. The time evolution of quantum entanglement, discord, and the respective classical correlation for a single, spin-1/2 particle under spin and energy degrees of freedom, with an initial Werner state, has been investigated in the present study. The present intra-particle system is considered to be easier to produce than its inter-particle counterpart. Experimentally, this type of system may be realized in the well-known Penning trap. The most stable correlation was identified through maximization of a system-specific global objective function. Quantum discord was found to be the most stable, followed by the classical correlation. Moreover, all the correlations were observed to attain highest robustness under initial Bell state, with minimum possible dephasing and decoherence parameters.

  4. Minijet initial state of heavy-ion collisions from next-to-leading order perturbative QCD

    CERN Document Server

    Paatelainen, Risto

    2014-01-01

    The aim of this thesis is to calculate field-theoretically as rigorously as possible the initial state of partonic matter produced in ultrarelativistic heavy-ion collisions at CERN-LHC and BNL-RHIC colliders. The computed minijet initial conditions are then used in the initialization of the relativistic hydrodynamical modeling of these collisions. In the theoretical introduction part the computation of parton production cross section at next-to-leading order (NLO) perturbative QCD (pQCD) is discussed. Furthermore, the full analytical calculation for the squared quark-quark scattering matrix element including the systematic ultraviolet renormalization is presented. Finally, the subtraction method allowing for the cancellation of the infrared and collinear singularities in the partonic QCD cross section at NLO is discussed. In the more phenomenological part of the thesis the original EKRT model, which combines collinearly factorized leading-order pQCD minijet production with gluon saturation, is introduced. Nex...

  5. Iterative Learning Control Design and Application for Linear Continuous Systems with Variable Initial States Based on 2-D System Theory

    OpenAIRE

    Wei Guan; Qiao Zhu; Xu-Dong Wang; Xu-Hui Liu

    2014-01-01

    This paper is concerned with the variable initial states problem in iterative learning control (ILC) for linear continuous systems. Firstly, the properties of the trajectory of 2-D continuous-discrete Roesser model are analyzed by using Lyapunov's method. Then, for any variable initial states which absolutely converge to the desired initial state, some ILC design criteria in the form of linear matrix inequalities (LMI) are given to ensure the convergence of the PD-type ILC rules. The converge...

  6. Initial state interactions and J/. psi. production in nucleus-nucleus collisions

    Energy Technology Data Exchange (ETDEWEB)

    Baglin, C.; Baldisseri, A.; Bussiere, A.; Guillaud, J.P.; Kossakowski, R.; Liaud, P.; Staley, F. (Lab. d' Annecy-le-Vieux de Physique des Particules, IN2P3-CNRS, 74 (France)); Baldit, A.; Barriere, C.; Castor, J.; Chambon, T.; Devaux, A.; Fargeix, J.; Force, P.; Fredj, L.; Landaud, G.; Vazeille, F. (Lab. de Physique Corpusculaire de Clermont-Ferrand, IN2P3-CNRS et Univ. Blaise Pascal, 63 - Aubiere (France)); Sonderegger, P. (EP Div., CERN, Geneva (Switzerland)); Abreu, M.C.; Bordalo, P.; Ferreira, R.; Gago, J.M.; Lourenco, C.; Peralta, L.; Ramos, S.; Silva, S.; Varela, J. (LIP, Lisbon (Portugal)); Gerschel, C.; Jouan, D.; Papillon, S.; Tarrago, X. (Inst. de Physique Nucleaire, IN2P3-CNRS et Paris-11 Univ., 91 - Orsay (France)); Busson, P.; Charlot, C.; Chaurand, B.; Kluberg, L.; Romana, A. (Lab. de Physique Nucleaire des Hautes Energies, Ecole Polytechnique, IN2P3-CNRS, 91 - Palaiseau (France)); Gorodetzky, P.; Grosdidier, B.; Racca, C. (Centre de Recherches Nucleaires, IN2P3-CNRS; NA38 Collaboration

    1991-10-17

    The mean squared transverse momentum of J/{Psi}'s measured in p-Cu, p-U, O-Cu, O-U and S-U collisions at 200 GeV/nucleon is analyzed in terms of initial state interactions. Taking this effect into account, the mechanism which suppresses the J/{Psi} production in ion-induced collisions would only have a weak P{sub {Tau}} dependence. (orig.).

  7. Hadronic Contributions to R and G-2 from Initial-State-Radiation Data

    Energy Technology Data Exchange (ETDEWEB)

    Bernard, Denis, 1; /Ecole Polytechnique

    2012-04-06

    I review the recent efforts to improve the precision of the prediction of the anomalous moment of the muon, in particular of the hadronic contribution of the vacuum polarization, which is the contribution with the largest uncertainty. Focus is given to the recent result for e{sup +}e{sup -} {yields} {pi}{sup +}{pi}{sup -} by the BaBar collaboration, obtained using events with radiation in the initial state.

  8. Obesity and risk of pancreatic cancer among postmenopausal women: the Women's Health Initiative (United States)

    OpenAIRE

    Luo, J.; Margolis, K L.; Adami, H-O; LaCroix, A. (Andrea); Ye, W.

    2008-01-01

    A total of 138 503 women in the Women's Health Initiative in the United States were followed (for an average of 7.7 years) through 12 September 2005 to examine obesity, especially central obesity in relation to pancreatic cancer (n=251). Women in the highest quintile of waist-to-hip ratio had 70% (95% confidence interval 10–160%) excess risk of pancreatic cancer compared with women in the lowest quintile.

  9. Initial-state colour dipole emission associated with QCD pomeron exchange

    CERN Document Server

    Bialas, A; Bialas, A; Peschanski, R

    1995-01-01

    The initial-state radiation of soft colour dipoles produced together with a single QCD Pomeron exchange (BFKL) in onium-onium scattering is calculated in the framework of Mueller's approach. The resulting dipole production grows with increasing energy and reveals an unexpected feature of a power-law tail at appreciably large transverse distances from the collision axis, this phenomenon being related to the scale-invariant structure of dipole-dipole correlations.

  10. Hadronic Contributions to R and G-2 from Initial-State-Radiation Data

    Energy Technology Data Exchange (ETDEWEB)

    Bernard, Denis, 1; /Ecole Polytechnique

    2012-04-06

    I review the recent efforts to improve the precision of the prediction of the anomalous moment of the muon, in particular of the hadronic contribution of the vacuum polarization, which is the contribution with the largest uncertainty. Focus is given to the recent result for e{sup +}e{sup -} {yields} {pi}{sup +}{pi}{sup -} by the BaBar collaboration, obtained using events with radiation in the initial state.

  11. Design, production and initial state of the backfill and plug in deposition tunnels

    Energy Technology Data Exchange (ETDEWEB)

    Boerjesson, Lennart; Gunnarsson, David; Johannesson, Lars-Erik; Jonsson, Esther

    2010-12-15

    The report is included in a set of Production reports, presenting how the KBS-3 repository is designed, produced and inspected. The set of reports is included in the safety report for the KBS-3 repository and repository facility. The report provides input on the initial state of the backfill and plug in deposition tunnels for the assessment of the long-term safety, SR-Site. The initial state refers to the properties of the engineered barriers once they have been finally placed in the KBS-3 repository and will not be further handled within the repository facility. In addition, the report provides input to the operational safety report, SR-Operation, on how the backfill and plug shall be handled and installed. The report presents the design premises and reference designs of the backfill and plug in deposition tunnels and verifies their conformity to the design premises. It also describes the production of the backfill from excavation and delivery of backfill material to installation in the deposition tunnel, and gives an outline of the installation of the plug. Finally, the initial states of the backfill and plug and their conformity to the reference designs and design premises are presented

  12. Market Structure Differences Impacting Australian Iron Ore and Metallurgical Coal Industries

    Directory of Open Access Journals (Sweden)

    Kurt Lawrence

    2015-07-01

    Full Text Available Steelmaking relies on iron ore and metallurgical coal as main ingredients, the trade of which is hypothesized to theoretically change in tandem. However, strong correlation is not evident in historical trade prices of steelmaking inputs. To determine causes to this occurrence, the market factors that influence the Australian iron ore and metallurgical coal industries were studied. Data was collected over the past decade for worldwide resource production and trade quantities of crude steel, iron ore, and metallurgical coal. The data was analysed to reveal trends, allowing examination of the macroeconomic trade of metallurgical coal and iron ore with relation to worldwide and country specific steel production. It was determined that the influential growth of China’s steel production has spurred the growth of worldwide iron ore demand, which was met with increased production and supply, from Australia. The increased metallurgical coal demand has been met with increased production within China locally. Measures of supply elasticity were created for worldwide iron ore and metallurgical coal trade, where comparisons between Australia’s industries to the relevant greatest competitor were examined. The results, along with respective resource production data, highlighted the elevated competitive position that Australian iron ore producers enjoy compared to metallurgical coal producers. Trade characteristics revealed the different market structures that iron ore and metallurgical coal industries operate in, prompting a discussion of the effects these markets have on the two Australian industries.

  13. Search for Charmonium States Decaying to J/psi gamma gamma Using Initial-State Radiation Events

    CERN Document Server

    Aubert, B; Bóna, M; Boutigny, D; Couderc, F; Karyotakis, Yu; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A; Graugès-Pous, E; Palano, A; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S; Eigen, G; Ofte, I; Stugu, B; Abrams, G S; Battaglia, M; Brown, D N; Button-Shafer, J; Cahn, R N; Charles, E; Gill, M S; Groysman, Y; Jacobsen, R G; Kadyk, J A; Kerth, L T; Kolomensky, Yu G; Kukartsev, G; Lynch, G; Mir, L M; Orimoto, T J; Pripstein, M; Roe, N A; Ronan, M T; Wenzel, W A; Del Amo-Sánchez, P; Barrett, M; Ford, K E; Hart, A J; Harrison, T J; Hawkes, C M; Morgan, S E; Watson, A T; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Peters, K; Schröder, T; Steinke, M; Boyd, J T; Burke, J P; Cottingham, W N; Walker, D; Asgeirsson, D J; Çuhadar-Dönszelmann, T; Fulsom, B G; Hearty, C; Knecht, N S; Mattison, T S; McKenna, J A; Khan, A; Kyberd, P; Saleem, M; Sherwood, D J; Teodorescu, L; Blinov, V E; Bukin, A D; Druzhinin, V P; Golubev, V B; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Todyshev, Y K; Best, D S; Bondioli, M; Bruinsma, M; Chao, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, A J; Lund, P; Mandelkern, M A; Mommsen, R K; Röthel, W; Stoker, D P; Abachi, S; Buchanan, C; Foulkes, S D; Gary, J W; Long, O; Shen, B C; Wang, K; Zhang, L; Hadavand, H K; Hill, E J; Paar, H P; Rahatlou, S; Sharma, V; Berryhill, J W; Campagnari, C; Cunha, A; Dahmes, B; Hong, T M; Kovalskyi, D; Richman, J D; Beck, T W; Eisner, A M; Flacco, C J; Heusch, C A; Kroseberg, J; Lockman, W S; Nesom, G; Schalk, T; Schumm, B A; Seiden, A; Spradlin, P; Williams, D C; Wilson, M G; Albert, J; Chen, E; Dvoretskii, A; Fang, F; Hitlin, D G; Narsky, I; Piatenko, T; Porter, F C; Ryd, A; Samuel, A; Mancinelli, G; Meadows, B T; Mishra, K; Sokoloff, M D; Blanc, F; Bloom, P C; Chen, S; Ford, W T; Hirschauer, J F; Kreisel, A; Nagel, M; Nauenberg, U; Olivas, A; Ruddick, W O; Smith, J G; Ulmer, K A; Wagner, S R; Zhang, J; Chen, A; Eckhart, E A; Soffer, A; Toki, W H; Wilson, R J; Winklmeier, F; Zeng, Q; Altenburg, D D; Feltresi, E; Hauke, A; Jasper, H; Merkel, J; Petzold, A; Spaan, B; Brandt, T; Klose, V; Lacker, H M; Mader, W F; Nogowski, R; Schubert, J; Schubert, K R; Schwierz, R; Sundermann, J E; Volk, A; Bernard, D; Bonneaud, G R; Latour, E; Thiebaux, C; Verderi, M; Clark, P J; Gradl, W; Muheim, F; Playfer, S; Robertson, A I; Xie, Y; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Luppi, E; Negrini, M; Petrella, A; Piemontese, L; Prencipe, E; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; De Sangro, R; Finocchiaro, G; Pacetti, S; Patteri, P; Peruzzi, I M; Piccolo, M; Rama, M; Zallo, A; Buzzo, A; Capra, R; Contri, R; Lo Vetere, M; Macri, M M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Brandenburg, G; Chaisanguanthum, K S; Morii, M; Wu, J; Dubitzky, R S; Marks, J; Schenk, S; Uwer, U; Bard, D J; Bhimji, W; Bowerman, D A; Dauncey, P D; Egede, U; Flack, R L; Nash, J A; Nikolich, M B; Panduro-Vazquez, W; Behera, P K; Chai, X; Charles, M J; Mallik, U; Meyer, N T; Ziegler, V; Cochran, J; Crawley, H B; Dong, L; Eyges, V; Meyer, W T; Prell, S; Rosenberg, E I; Rubin, A E; Gritsan, A V; Denig, A G; Fritsch, M; Schott, G; Arnaud, N; Davier, M; Grosdidier, G; Höcker, A; Le Diberder, F R; Lepeltier, V; Lutz, A M; Oyanguren, A; Pruvot, S; Rodier, S; Roudeau, P; Schune, M H; Stocchi, A; Wang, W F; Wormser, G; Cheng, C H; Lange, D J; Wright, D M; Chavez, C A; Forster, I J; Fry, J R; Gabathuler, E; Gamet, R; George, K A; Hutchcroft, D E; Payne, D J; Schofield, K C; Touramanis, C; Bevan, A J; Di Lodovico, F; Menges, W; Sacco, R; Cowan, G; Flächer, H U; Hopkins, D A; Jackson, P S; McMahon, T R; Ricciardi, S; Salvatore, F; Wren, A C; Davis, C L; Allison, J; Barlow, N R; Barlow, R J; Chia, Y M; Edgar, C L; Lafferty, G D; Naisbit, M T; Williams, J C; Yi, J I; Chen, C; Hulsbergen, W D; Jawahery, A; Lae, C K; Roberts, D A; Simi, G; Blaylock, G; Dallapiccola, C; Hertzbach, S S; Li, X; Moore, T B; Saremi, S; Stängle, H; Cowan, R; Sciolla, G; Sekula, S J; Spitznagel, M; Taylor, F; Yamamoto, R K; Kim, H; Mclachlin, S E; Patel, P M; Robertson, S H; Lazzaro, A; Lombardo, V; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Sanders, D A; Summers, D J; Zhao, H W; Brunet, S; Côté, D; Simard, M; Taras, P; Viaud, F B; Nicholson, H; Cavallo, N; De Nardo, Gallieno; Fabozzi, F; Gatto, C; Lista, L; Monorchio, D; Paolucci, P; Piccolo, D; Sciacca, C; Baak, M A; Raven, G; Snoek, H L; Jessop, C P; LoSecco, J M; Allmendinger, T; Benelli, G; Corwin, L A; Gan, K K; Honscheid, K; Hufnagel, D; Jackson, P D; Kagan, H; Kass, R; Rahimi, A M; Regensburger, J J; Ter-Antonian, R; Wong, Q K; Blount, N L; Brau, J E; Frey, R; Igonkina, O; Kolb, J A; Lu, M; Rahmat, R; Sinev, N B; Strom, D; Strube, J; Torrence, E; Gaz, A; Margoni, M; Morandin, M; Pompili, A; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Benayoun, M; Briand, H; Chauveau, J; David, P; Del Buono, L; La Vaissière, C de; Hamon, O; Hartfiel, B L; John, M J J; Leruste, P; Malcles, J; Ocariz, J; Roos, L; Therin, G; Gladney, L; Panetta, J; Biasini, M; Covarelli, R; Angelini, C; Batignani, G; Bettarini, S; Bucci, F; Calderini, G; Carpinelli, M; Cenci, R; Forti, F; Giorgi, M A; Lusiani, A; Marchiori, G; Mazur, M A; Morganti, M; Neri, N; Paoloni, E; Rizzo, G; Walsh, J J; Haire, M; Judd, D; Wagoner, D E; Biesiada, J; Danielson, N; Elmer, P; Lau, Y P; Lü, C; Olsen, J; Smith, A J S; Telnov, A V; Bellini, F; Cavoto, G; D'Orazio, A; Del Re, D; Di Marco, E; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Li Gioi, L; Mazzoni, M A; Morganti, S; Piredda, G; Polci, F; Safai-Tehrani, F; Voena, C; Ebert, M; Schröder, H; Waldi, R; Adye, T; De Groot, N; Franek, B; Olaiya, E O; Wilson, F F; Aleksan, R; Emery, S; Gaidot, A; Ganzhur, S F; Hamel de Monchenault, G; Kozanecki, Witold; Legendre, M; Vasseur, G; Yéche, C; Zito, M; Chen, X R; Liu, H; Park, W; Purohit, M V; Wilson, J R; Allen, M T; Aston, D; Bartoldus, R; Bechtle, P; Berger, N; Claus, R; Coleman, J P; Convery, M R; Cristinziani, M; Dingfelder, J C; Dorfan, J; Dubois-Felsmann, G P; Dujmic, D; Dunwoodie, W M; Field, R C; Glanzman, T; Gowdy, S J; Graham, M T; Grenier, P; Halyo, V; Hast, C; Hrynóva, T; Innes, W R; Kelsey, M H; Kim, P; Leith, D W G S; Li, S; Luitz, S; Lüth, V; Lynch, H L; MacFarlane, D B; Marsiske, H; Messner, R; Müller, D R; O'Grady, C P; Ozcan, V E; Perazzo, A; Perl, M; Pulliam, T; Ratcliff, B N; Roodman, A; Salnikov, A A; Schindler, R H; Schwiening, J; Snyder, A; Stelzer, J; Su, D; Sullivan, M K; Suzuki, K; Swain, S K; Thompson, J M; Vavra, J; Van Bakel, N; Weaver, M; Weinstein, A J R; Wisniewski, W J; Wittgen, M; Wright, D H; Yarritu, A K; Yi, K; Young, C C; Burchat, P R; Edwards, A J; Majewski, S A; Petersen, B A; Roat, C; Wilden, L; Ahmed, S; Alam, M S; Bula, R; Ernst, J A; Jain, V; Pan, B; Saeed, M A; Wappler, F R; Zain, S B; Bugg, W; Krishnamurthy, M; Spanier, S M; Eckmann, R; Ritchie, J L; Satpathy, A; Schilling, C J; Schwitters, R F; Izen, J M; Lou, X C; Ye, S; Bianchi, F; Gallo, F; Gamba, D; Bomben, M; Bosisio, L; Cartaro, C; Cossutti, F; Della Ricca, G; Dittongo, S; Lanceri, L; Vitale, L; Azzolini, V; Lopez-March, N; Martínez-Vidal, F; Banerjee, Sw; Bhuyan, B; Brown, C M; Fortin, D; Hamano, K; Kowalewski, R V; Nugent, I M; Roney, J M; Sobie, R J; Back, J J; Harrison, P F; Latham, T E; Mohanty, G B; Pappagallo, M; Band, H R; Chen, X; Cheng, B; Dasu, S; Datta, M; Flood, K T; Hollar, J J; Kutter, P E; Mellado, B; Mihályi, A; Pan, Y; Pierini, M; Prepost, R; Wu, S L; Yu, Z; Neal, H; al, et

    2006-01-01

    We study the processes e+e- -> (J/psi gamma gamma) gamma and e+e- -> (J/psi pi- pi+) gamma where the hard photon radiated from an initial e+e- collision with center-of-mass (CM) energy near 10.58 GeV is detected. In the final state J/psi gamma gamma we consider J/psi pi0, J/psi eta, chi_{c1} gamma, and chi_{c2} gamma candidates. The invariant mass of the hadronic final state defines the effective e+e- CM energy in each event, so these data can be compared with direct e+e- measurements. We report 90% CL upper limits for the integrated cross section times branching fractions of the J/psi gamma gamma channels in the Y(4260) mass region.

  14. Relation between initial conditions and entanglement sudden death for two-qubit extended Werner-like states

    Institute of Scientific and Technical Information of China (English)

    Yang Bai-Yuan; Fang Mao-Fa; Huang Jiang

    2013-01-01

    In this paper,the dynamical behavior of entanglement of an uncoupled two-qubit system,which interacts with independent identical amplitude damping environments and is initially prepared in the extended Werner-like (EWL) states,is investigated.The results show that whether entanglement sudden death (ESD) of an EWL state will occur or not depends on initial purity and concurrence.The boundaries between ESD states and ESD-free states for two kinds of EWL states are found to be different.Furthermore,some regions are shown where ESD states can be transformed into ESD-free states by local unitary operations.

  15. Variational data assimilation for the optimized ozone initial state and the short-time forecasting

    Science.gov (United States)

    Park, Soon-Young; Kim, Dong-Hyeok; Lee, Soon-Hwan; Lee, Hwa Woon

    2016-04-01

    In this study, we apply the four-dimensional variational (4D-Var) data assimilation to optimize initial ozone state and to improve the predictability of air quality. The numerical modeling systems used for simulations of atmospheric condition and chemical formation are the Weather Research and Forecasting (WRF) model and the Community Multiscale Air Quality (CMAQ) model . The study area covers the capital region of South Korea, where the surface measurement sites are relatively evenly distributed. The 4D-Var code previously developed for the CMAQ model is modified to consider background error in matrix form, and various numerical tests are conducted. The results are evaluated with an idealized covariance function for the appropriateness of the modified codes. The background error is then constructed using the NMC method with long-term modeling results, and the characteristics of the spatial correlation scale related to local circulation is analyzed. The background error is applied in the 4D-Var research, and a surface observational assimilation is conducted to optimize the initial concentration of ozone. The statistical results for the 12-hour assimilation periods and the 120 observatory sites show a 49.4% decrease in the root mean squred error (RMSE), and a 59.9% increase in the index of agreement (IOA). The temporal variation of spatial distribution of the analysis increments indicates that the optimized initial state of ozone concentration is transported to inland areas by the clockwise-rotating local circulation during the assimilation windows. To investigate the predictability of ozone concentration after the assimilation window, a short-time forecasting is carried out. The ratios of the RMSE with assimilation versus that without assimilation are 8% and 13% for the +24 and +12 hours, respectively. Such a significant improvement in the forecast accuracy is obtained solely by using the optimized initial state. The potential improvement in ozone prediction for

  16. Connecticut State University System Initiative for Nanotechnology-Related Equipment, Faculty Development and Curriculum Development

    Energy Technology Data Exchange (ETDEWEB)

    Broadbridge, Christine C. [Southern Connecticut State University

    2013-03-28

    DOE grant used for partial fulfillment of necessary laboratory equipment for course enrichment and new graduate programs in nanotechnology at the four institutions of the Connecticut State University System (CSUS). Equipment in this initial phase included variable pressure scanning electron microscope with energy dispersive x-ray spectroscopy elemental analysis capability [at Southern Connecticut State University]; power x-ray diffractometer [at Central Connecticut State University]; a spectrophotometer and spectrofluorimeter [at Eastern Connecticut State University; and a Raman Spectrometer [at Western Connecticut State University]. DOE's funding was allocated for purchase and installation of this scientific equipment and instrumentation. Subsequently, DOE funding was allocated to fund the curriculum, faculty development and travel necessary to continue development and implementation of the System's Graduate Certificate in Nanotechnology (GCNT) program and the ConnSCU Nanotechnology Center (ConnSCU-NC) at Southern Connecticut State University. All of the established outcomes have been successfully achieved. The courses and structure of the GCNT program have been determined and the program will be completely implemented in the fall of 2013. The instrumentation has been purchased, installed and has been utilized at each campus for the implementation of the nanotechnology courses, CSUS GCNT and the ConnSCU-NC. Additional outcomes for this grant include curriculum development for non-majors as well as faculty and student research.

  17. Prediction of the ledge thickness inside a high-temperature metallurgical reactor using a virtual sensor

    Science.gov (United States)

    LeBreux, Marc; Désilets, Martin; Lacroix, Marcel

    2012-11-01

    A non-intrusive inverse heat transfer procedure for predicting the time-varying thickness of the phase-change ledge on the inner surface of the walls of a high-temperature metallurgical reactor is presented. An extended Kalman filter with augmented state is coupled with a nonlinear state-space model of the reactor in order to estimate on-line the position of the phase front. The data are collected by a heat flux sensor located inside or outside of the reactor wall. This non-intrusive method can be seen as a virtual sensor which is defined as the combination of an estimation algorithm with measurements for the estimation of 'hard to measure' on-line process variables. The inverse prediction of the ledge thickness with the virtual sensor is thoroughly tested for typical operating conditions that prevail inside an industrial facility. Due to the fact that the melting/solidification process inside the reactor is highly nonlinear, results show that the accuracy of the state-space identification and the virtual sensor estimation is far superior when a nonlinear state-space model and the extended Kalman filter are employed, as opposed to a linear state-space model and the classic Kalman filter. In the former, it is shown that the discrepancy between the exact and the estimated ledge thickness remains smaller than 10% at all times.

  18. Optimal control of the initiation of a pericyclic reaction in the electronic ground state

    Indian Academy of Sciences (India)

    Timm Bredtmann; Jörn Manz

    2012-01-01

    Pericyclic reactions in the electronic ground state may be initiated by down-chirped pump-dump sub-pulses of an optimal laser pulse, in the ultraviolet (UV) frequency and sub-10 femtosecond (fs) time domain. This is demonstrated by means of a quantum dynamics model simulation of the Cope rearrangement of Semibullvalene. The laser pulse is designed by means of optimal control theory, with detailed analysis of the mechanism. The theoretical results support the recent experimental initiation of a pericyclic reaction. The present approach provides an important step towards monitoring asynchronous electronic fluxes during synchronous nuclear pericyclic reaction dynamics, with femto-to-attosecond time resolution, as motivated by the recent prediction of our group.

  19. Anisotropic non-Gaussianity from Rotational Symmetry Breaking Excited Initial States

    CERN Document Server

    Ashoorioon, Amjad; Koivisto, Tomi

    2016-01-01

    If the initial quantum state of the primordial perturbations broke rotational invariance, that would be seen as a statistical anisotropy in the angular correlations of the cosmic microwave background radiation (CMBR) temperature fluctuations. This can be described by a general parameterisation of the initial conditions that takes into account the possible direction-dependence of both the amplitude and the phase of particle creation during inflation. The leading effect in the CMBR two-point function is typically a quadrupole modulation, whose coefficient is analytically constrained here to be $|B| \\lesssim 0.06$. The CMBR three-point function then acquires enhanced non-gaussianity, especially for the local configurations. In the large occupation number limit, a distinctive prediction is a modulation of the non-gaussianity around a mean value depending on the angle that short and long wavelength modes make with the preferred direction. The maximal variations with respect to the mean value occur for the configur...

  20. Iterative Learning Control Design and Application for Linear Continuous Systems with Variable Initial States Based on 2-D System Theory

    Directory of Open Access Journals (Sweden)

    Wei Guan

    2014-01-01

    Full Text Available This paper is concerned with the variable initial states problem in iterative learning control (ILC for linear continuous systems. Firstly, the properties of the trajectory of 2-D continuous-discrete Roesser model are analyzed by using Lyapunov's method. Then, for any variable initial states which absolutely converge to the desired initial state, some ILC design criteria in the form of linear matrix inequalities (LMI are given to ensure the convergence of the PD-type ILC rules. The convergence for variable initial states implies that the ILC rules can be used to achieve the perfect tacking for variable initial states, even if the system dynamic is unknown. Finally, the micropropulsion system is considered to illustrate efficiency of the proposed ILC design criteria.

  1. Moving science into state child and adolescent mental health systems: Illinois' evidence-informed practice initiative.

    Science.gov (United States)

    Starin, Amy C; Atkins, Marc S; Wehrmann, Kathryn C; Mehta, Tara; Hesson-McInnis, Matthew S; Marinez-Lora, A; Mehlinger, Renee

    2014-01-01

    In 2005, the Illinois State Mental Health Authority embarked on an initiative to close the gap between research and practice in the children's mental health system. A stakeholder advisory council developed a plan to advance evidence informed practice through policy and program initiatives. A multilevel approach was developed to achieve this objective, which included policy change, stakeholder education, and clinician training. This article focuses on the evidence-informed training process designed following review of implementation research. The training involved in-person didactic sessions and twice-monthly telephone supervision across 6 cohorts of community based clinicians, each receiving 12 months of training. Training content initially included cognitive behavioral therapy and behavioral parent training and was adapted over the years to a practice model based on common element concepts. Evaluation based on provider and parent report indicated children treated by training clinicians generally showed superior outcomes versus both a treatment-as-usual comparison group for Cohorts 1 to 4 and the statewide child population as a whole after 90 days of care for Cohorts 5 to 6. The results indicated primarily moderate to strong effects for the evidence-based training groups. Moving a large public statewide child mental health system toward more effective services is a complex and lengthy process. These results indicate training of community mental health providers in Illinois in evidence-informed practice was moderately successful in positively impacting child-level functional outcomes. These findings also influenced state policy in committing resources to continuing the initiative, even in difficult economic times.

  2. Carbonization behaviour of woody biomass and resulting metallurgical coke properties

    Energy Technology Data Exchange (ETDEWEB)

    Matsumura, T.; Ichida, M.; Nagasaka, T.; Kato, K. [Tohoku University, Miyagi (Japan). Graduate School for Environmental Studies

    2008-07-01

    The technology using waste wood from construction and thinned wood that are not recycled in the woody biomass as one of raw materials for producing metallurgical coke was examined in detail by adding them to coal and carbonizing them. In the carbonization tests, four types of woody biomasses showed substantially almost the same results in respect to material balance and composition of carbonized products. Compared with raw woods, woody biomasses compressively formed to not smaller than 10 mm permit an increase in the addition rate to 1.5% while inhibiting the lowering of coke strength. Hot compressive forming at 200-350 degrees C where pyrolysis of woody biomass occurs inhibits the lowering of coke strength and will therefore permit an increase in the use of woody biomasses. As a result, the possibility to use as a raw material for the coke manufacturing by adding the compressively formed woody biomass was found.

  3. Inventory management in a metallurgical of the automotive industry

    Directory of Open Access Journals (Sweden)

    Marcos Antonio Maia de Oliveira

    2015-12-01

    Full Text Available This article aims to analyze the importance of inventory management in a metallurgical company, located in Santo André city, in Grande São Paulo, since the inventory management is crucial within a company that wants to survive nowadays, by studying the main features and trends in the methods used for inventory control. In this case study the basic concepts for good control were considered, showing tools currently used in the market, providing data for material purchase, sales control, parts in stock, future orders, MRP, storage space, among others once many companies have high and unnecessary cost of stock for not being aware of the real importance of this control. It is felt that the logistics of the company should invest in technology by purchasing the MRP system, visiting fairs and attending seminars. This way, the company will have better inventory control thus consequently decrease the purchase of materials.

  4. Municipal solid waste disposal by using metallurgical technologies and equipments

    Directory of Open Access Journals (Sweden)

    Jiuju Cai, Wenqiang Sun

    2012-01-01

    Full Text Available Pyrolysis of municipal solid waste can take full advantage of energy and resource and avoid producing hazardous material during this period. In combination with mature metallurgical technologies of coking by coke oven, regenerative flame furnace technology and melting by electric arc furnace, technologies of regenerative fixed bed pyrolysis technology for household waste, co-coking technology for waste plastic and blend coal, and incineration ash melting technology by electric arc technology for medical waste were respectively developed to improve current unsatisfied sorting status of waste. The investigation results of laboratory experiments, semi-industrial experiments and industrial experiments as well as their economic benefits and environmental benefits for related technologies were separately presented.

  5. Textural changes in metallurgical coke prepared with polyethylene

    Institute of Scientific and Technical Information of China (English)

    Stanislav S.Gornostayev; Jyrki J.Heino; Tommi M.T.Kokkonen; Hannu T.Makkonen; Satu M.M.Huttunen; Timo M.J.Fabritius

    2014-01-01

    The effect of high-density polyethylene (HDPE) on the textural features of experimental coke was investigated using polar-ized-light optical microscopy and wavelet-based image analysis. Metallurgical coke samples were prepared in a laboratory-scale furnace with 2.5%, 5.0%, 7.5%, 10.0%, and 12.5%HDPE by mass, and one sample was prepared by 100%coal. The amounts and distribution of textures (isotropic, mosaic and banded) and pores were obtained. The calculations reveal that the addition of HDPE results in a decrease of mosaic texture and an increase of isotropic texture. Ethylene formed from the decomposition of HDPE is considered as a probable reason for the texture modifications. The approach used in this study can be applied to indirect evaluation for the reactivity and strength of coke.

  6. Fast and high-fidelity optical initialization of spin state of an electron in a semiconductor quantum dot using light-hole-trion states

    Science.gov (United States)

    Kumar, Parvendra; Nakajima, Takashi

    2016-07-01

    We theoretically show that under the Faraday geometry fast and high-fidelity optical initialization of electron spin (ES) state in a semiconductor quantum dot (SQD) can be realized by utilizing the light-hole (LH)-trion states. Initialization is completed within the time scale of ten nanoseconds with high fidelity, and the initialization laser pulse can be linearly, right-circularly, or left-circularly polarized. Moreover, we demonstrate that the time required for initialization can be further shortened down to a few hundreds of picoseconds if we introduce a pillar-microcavity to promote the relaxation of a LH-trion state towards the desired ES state through the Purcell effect. We also clarify the role of heavy-hole and light-hole mixing induced transitions on the fidelity of ES state initialization.

  7. Coherence effects between the initial and final state radiation in a dense QCD medium

    CERN Document Server

    Martinez, Mauricio

    2014-01-01

    In these proceedings contribution we review our recent results of medium modifications to the coherence pattern between the initial and final state radiation. We study single gluon production off a highly energetic parton that undergoes a hard scattering and subsequently crosses a dense QCD medium of finite size. Multiple scatterings lead to a partial suppression of the interferences between different emitters that opens the phase space for large angle emissions. We briefly discuss the generalization of this setup to describe gluon production in the case of pA collisions by including finite length and energy corrections. The configuration studied here may have phenomenological consequences in high-energy nuclear collisions.

  8. Coherence effects between the initial and final state radiation in a dense QCD medium

    Energy Technology Data Exchange (ETDEWEB)

    Martinez, Mauricio [Departamento de Física de Partículas and IGFAE, Universidade de Santiago de Compostela, E-15706 Santiago de Compostela, Galicia (Spain); Department of Physics, The Ohio State University, Columbus, OH 43210 (United States)

    2014-06-15

    In these proceedings contribution we review our recent results of medium modifications to the coherence pattern between the initial and final state radiation. We study single gluon production off a highly energetic parton that undergoes a hard scattering and subsequently crosses a dense QCD medium of finite size. Multiple scatterings lead to a partial suppression of the interferences between different emitters that opens the phase space for large angle emissions. We briefly discuss the generalization of this setup to describe gluon production in the case of pA collisions by including finite length and energy corrections. The configuration studied here may have phenomenological consequences in high-energy nuclear collisions.

  9. First measurement of proton's charge form factor at very low Q2 with initial state radiation

    Science.gov (United States)

    Mihovilovič, M.; Weber, A. B.; Achenbach, P.; Beranek, T.; Beričič, J.; Bernauer, J. C.; Böhm, R.; Bosnar, D.; Cardinali, M.; Correa, L.; Debenjak, L.; Denig, A.; Distler, M. O.; Esser, A.; Ferretti Bondy, M. I.; Fonvieille, H.; Friedrich, J. M.; Friščić, I.; Griffioen, K.; Hoek, M.; Kegel, S.; Kohl, Y.; Merkel, H.; Middleton, D. G.; Müller, U.; Nungesser, L.; Pochodzalla, J.; Rohrbeck, M.; Sánchez Majos, S.; Schlimme, B. S.; Schoth, M.; Schulz, F.; Sfienti, C.; Širca, S.; Štajner, S.; Thiel, M.; Tyukin, A.; Vanderhaeghen, M.; Weinriefer, M.

    2017-08-01

    We report on a new experimental method based on initial-state radiation (ISR) in e-p scattering, which exploits the radiative tail of the elastic peak to study the properties of electromagnetic processes and to extract the proton charge form factor (GEp) at extremely small Q2. The ISR technique was implemented in an experiment at the three-spectrometer facility of the Mainz Microtron (MAMI). This led to a precise validation of radiative corrections far away from elastic line and provided first measurements of GEp for 0.001 ≤Q2 ≤ 0.004(GeV / c) 2.

  10. Exclusive initial-state-radiation production of the D Dmacr , D* Dmacr , and D* Dmacr * systems

    Science.gov (United States)

    Aubert, B.; Karyotakis, Y.; Lees, J. P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Lopez, L.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I. L.; Tackmann, K.; Tanabe, T.; Hawkes, C. M.; Soni, N.; Watson, A. T.; Koch, H.; Schroeder, T.; Asgeirsson, D. J.; Fulsom, B. G.; Hearty, C.; Mattison, T. S.; McKenna, J. A.; Barrett, M.; Khan, A.; Randle-Conde, A.; Blinov, V. E.; Bukin, A. D.; Buzykaev, A. R.; Druzhinin, V. P.; Golubev, V. B.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu.; Bondioli, M.; Curry, S.; Eschrich, I.; Kirkby, D.; Lankford, A. J.; Lund, P.; Mandelkern, M.; Martin, E. C.; Stoker, D. P.; Abachi, S.; Buchanan, C.; Atmacan, H.; Gary, J. W.; Liu, F.; Long, O.; Vitug, G. M.; Yasin, Z.; Zhang, L.; Sharma, V.; Campagnari, C.; Hong, T. M.; Kovalskyi, D.; Mazur, M. A.; Richman, J. D.; Beck, T. W.; Eisner, A. M.; Heusch, C. A.; Kroseberg, J.; Lockman, W. S.; Martinez, A. J.; Schalk, T.; Schumm, B. A.; Seiden, A.; Winstrom, L. O.; Cheng, C. H.; Doll, D. A.; Echenard, B.; Fang, F.; Hitlin, D. G.; Narsky, I.; Piatenko, T.; Porter, F. C.; Andreassen, R.; Mancinelli, G.; Meadows, B. T.; Mishra, K.; Sokoloff, M. D.; Bloom, P. C.; Ford, W. T.; Gaz, A.; Hirschauer, J. F.; Nagel, M.; Nauenberg, U.; Smith, J. G.; Wagner, S. R.; Ayad, R.; Soffer, A.; Toki, W. H.; Wilson, R. J.; Feltresi, E.; Hauke, A.; Jasper, H.; Karbach, M.; Merkel, J.; Petzold, A.; Spaan, B.; Wacker, K.; Kobel, M. J.; Nogowski, R.; Schubert, K. R.; Schwierz, R.; Volk, A.; Bernard, D.; Bonneaud, G. R.; Latour, E.; Verderi, M.; Clark, P. J.; Playfer, S.; Watson, J. E.; Andreotti, M.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cecchi, A.; Cibinetto, G.; Franchini, P.; Luppi, E.; Negrini, M.; Petrella, A.; Piemontese, L.; Santoro, V.; Baldini-Ferroli, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Pacetti, S.; Patteri, P.; Peruzzi, I. M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Guido, E.; Lo Vetere, M.; Monge, M. R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Tosi, S.; Chaisanguanthum, K. S.; Morii, M.; Adametz, A.; Marks, J.; Schenk, S.; Uwer, U.; Bernlochner, F. U.; Klose, V.; Lacker, H. M.; Bard, D. J.; Dauncey, P. D.; Tibbetts, M.; Behera, P. K.; Chai, X.; Charles, M. J.; Mallik, U.; Cochran, J.; Crawley, H. B.; Dong, L.; Meyer, W. T.; Prell, S.; Rosenberg, E. I.; Rubin, A. E.; Gao, Y. Y.; Gritsan, A. V.; Guo, Z. J.; Arnaud, N.; Béquilleux, J.; D'Orazio, A.; Davier, M.; da Costa, J. Firmino; Grosdidier, G.; Le Diberder, F.; Lepeltier, V.; Lutz, A. M.; Pruvot, S.; Roudeau, P.; Schune, M. H.; Serrano, J.; Sordini, V.; Stocchi, A.; Wormser, G.; Lange, D. J.; Wright, D. M.; Bingham, I.; Burke, J. P.; Chavez, C. A.; Fry, J. R.; Gabathuler, E.; Gamet, R.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.; Bevan, A. J.; Clarke, C. K.; di Lodovico, F.; Sacco, R.; Sigamani, M.; Cowan, G.; Paramesvaran, S.; Wren, A. C.; Brown, D. N.; Davis, C. L.; Denig, A. G.; Fritsch, M.; Gradl, W.; Hafner, A.; Alwyn, K. E.; Bailey, D.; Barlow, R. J.; Jackson, G.; Lafferty, G. D.; West, T. J.; Yi, J. I.; Anderson, J.; Chen, C.; Jawahery, A.; Roberts, D. A.; Simi, G.; Tuggle, J. M.; Dallapiccola, C.; Salvati, E.; Saremi, S.; Cowan, R.; Dujmic, D.; Fisher, P. H.; Henderson, S. W.; Sciolla, G.; Spitznagel, M.; Yamamoto, R. K.; Zhao, M.; Patel, P. M.; Robertson, S. H.; Schram, M.; Lazzaro, A.; Lombardo, V.; Palombo, F.; Stracka, S.; Bauer, J. M.; Cremaldi, L.; Godang, R.; Kroeger, R.; Summers, D. J.; Zhao, H. W.; Simard, M.; Taras, P.; Nicholson, H.; de Nardo, G.; Lista, L.; Monorchio, D.; Onorato, G.; Sciacca, C.; Raven, G.; Snoek, H. L.; Jessop, C. P.; Knoepfel, K. J.; Losecco, J. M.; Wang, W. F.; Corwin, L. A.; Honscheid, K.; Kagan, H.; Kass, R.; Morris, J. P.; Rahimi, A. M.; Regensburger, J. J.; Sekula, S. J.; Wong, Q. K.; Blount, N. L.; Brau, J.; Frey, R.; Igonkina, O.; Kolb, J. A.; Lu, M.; Rahmat, R.; Sinev, N. B.; Strom, D.; Strube, J.; Torrence, E.; Castelli, G.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Voci, C.; Del Amo Sanchez, P.; Ben-Haim, E.; Briand, H.; Chauveau, J.; Hamon, O.; Leruste, Ph.; Ocariz, J.; Perez, A.; Prendki, J.; Sitt, S.; Gladney, L.; Biasini, M.; Manoni, E.; Angelini, C.; Batignani, G.; Bettarini, S.; Calderini, G.; Carpinelli, M.; Cervelli, A.; Forti, F.; Giorgi, M. A.; Lusiani, A.; Marchiori, G.; Morganti, M.; Neri, N.; Paoloni, E.; Rizzo, G.; Walsh, J. J.; Pegna, D. Lopes; Lu, C.; Olsen, J.; Smith, A. J. S.; Telnov, A. V.; Anulli, F.; Baracchini, E.; Cavoto, G.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Jackson, P. D.; Gioi, L. Li; Mazzoni, M. A.; Morganti, S.; Piredda, G.; Renga, F.

    2009-05-01

    We perform a study of the exclusive production of D Dmacr , D* Dmacr , and D* Dmacr * in initial-state-radiation events, from e+e- annihilations at a center-of-mass energy near 10.58 GeV, to search for charmonium and possible new resonances. The data sample corresponds to an integrated luminosity of 384fb-1 and was recorded by the BABAR experiment at the PEP-II storage rings. The D Dmacr , D* Dmacr , and D* Dmacr * mass spectra show clear evidence of several ψ resonances. However, there is no evidence for Y(4260)→D* Dmacr or Y(4260)→D* Dmacr *.

  11. A (not so?) novel explanation for the very special initial state of the universe

    CERN Document Server

    Okon, Elias

    2016-01-01

    We put forward a proposal that combines objective collapse models, developed in connection to quantum-foundational questions, with the so-called Weyl curvature hypothesis, introduced by Roger Penrose as an attempt to account for the very spacial initial state of the Universe. In particular, we explain how a curvature dependence of the collapse rate of such models could offer a dynamical justification for Penrose's conjecture. The present essay constitutes an extension of a previous proposal of ours that uses collapse theories in dealing with open problems in contemporary physical theories.

  12. Strengthening the Effectiveness of State-Level Community Health Worker Initiatives Through Ambulatory Care Partnerships

    Science.gov (United States)

    Allen, Caitlin; Nell Brownstein, J.; Jayapaul-Philip, Bina; Matos, Sergio; Mirambeau, Alberta

    2017-01-01

    The transformation of the US health care system and the recognition of the effectiveness of community health workers (CHWs) have accelerated national, state, and local efforts to engage CHWs in the support of vulnerable populations. Much can be learned about how to successfully integrate CHWs into health care teams, how to maximize their impact on chronic disease self-management, and how to strengthen their role as emissaries between clinical services and community resources; we share examples of effective strategies. Ambulatory care staff members are key partners in statewide initiatives to build and sustain the CHW workforce and reduce health disparities. PMID:26049655

  13. Nonequilibrium critical dynamics of the two-dimensional Ising model quenched from a correlated initial state.

    Science.gov (United States)

    Környei, László; Pleimling, Michel; Iglói, Ferenc

    2008-01-01

    The universality class, even the order of the transition, of the two-dimensional Ising model depends on the range and the symmetry of the interactions (Onsager model, Baxter-Wu model, Turban model, etc.), but the critical temperature is generally the same due to self-duality. Here we consider a sudden change in the form of the interaction and study the nonequilibrium critical dynamical properties of the nearest-neighbor model. The relaxation of the magnetization and the decay of the autocorrelation function are found to display a power law behavior with characteristic exponents that depend on the universality class of the initial state.

  14. Post-prior discrepancies in the continuum distorted wave-eikonal initial state approximation for ion-helium ionization

    Energy Technology Data Exchange (ETDEWEB)

    Ciappina, M F [CONICET and Departamento de Fisica, Universidad Nacional del Sur, 8000 Bahia Blanca (Argentina); Cravero, W R [CONICET and Departamento de Fisica, Universidad Nacional del Sur, 8000 Bahia Blanca (Argentina); Garibotti, C R [CONICET and Division Colisiones Atomicas, Centro Atomico Bariloche, 8400 Bariloche (Argentina)

    2003-09-28

    We have explored post-prior discrepancies within continuum distorted wave-eikonal initial state theory for ion-atom ionization. Although there are no post-prior discrepancies when electron-target initial and final states are exact solutions of the respective Hamiltonians, discrepancies do arise for multielectronic targets, when a hydrogenic continuum with effective charge is used for the final electron-residual target wavefunction. We have found that the prior version calculations give better results than the post version, particularly for highly charged projectiles. We have explored the reasons for this behaviour and found that the prior version shows less sensitivity to the choice of the final state. The fact that the perturbation potentials operate upon the initial state suggests that the selection of the initial bound state is relatively more important than the final continuum state for the prior version.

  15. Study of the Exclusive Initial-State-Radiation Production of the DDbar System

    CERN Document Server

    Aubert, B; Boutigny, D; Karyotakis, Yu; Lees, J P; Poireau, V; Prudent, X; Tisserand, V; Zghiche, A; Garra Tico, J; Graugès-Pous, E; López, L; Palano, A; Pappagallo, M; Eigen, G; Stugu, B; Sun, L; Abrams, G S; Battaglia, M; Brown, D N; Button-Shafer, J; Cahn, R N; Groysman, Y; Jacobsen, R G; Kadyk, J A; Kerth, L T; Kolomensky, Yu G; Kukartsev, G; Lopes-Pegna, D; Lynch, G; Mir, L M; Orimoto, T J; Osipenkov, I L; Ronan, M T; Tackmann, K; Tanabé, T; Wenzel, W A; Del Amo-Sánchez, P; Hawkes, C M; Watson, A T; Koch, H; Schröder, T; Walker, D; Asgeirsson, D J; Çuhadar-Dönszelmann, T; Fulsom, B G; Hearty, C; Mattison, T S; McKenna, J A; Barrett, M; Khan, A; Saleem, M; Teodorescu, L; Blinov, V E; Bukin, A D; Druzhinin, V P; Golubev, V B; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Todyshev, K Yu; Bondioli, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, A J; Lund, P; Mandelkern, M; Martin, E C; Stoker, D P; Abachi, S; Buchanan, C; Foulkes, S D; Gary, J W; Liu, F; Long, O; Shen, B C; Vitug, G M; Zhang, L; Paar, H P; Rahatlou, S; Sharma, V; Berryhill, J W; Campagnari, C; Cunha, A; Dahmes, B; Hong, T M; Kovalskyi, D; Richman, J D; Beck, T W; Eisner, A M; Flacco, C J; Heusch, C A; Kroseberg, J; Lockman, W S; Schalk, T; Schumm, B A; Seiden, A; Wilson, M G; Winstrom, L O; Chen, E; Cheng, C H; Fang, F; Hitlin, D G; Narsky, I; Piatenko, T; Porter, F C; Andreassen, R; Mancinelli, G; Meadows, B T; Mishra, K; Sokoloff, M D; Blanc, F; Bloom, P C; Chen, S; Ford, W T; Hirschauer, J F; Kreisel, A; Nagel, M; Nauenberg, U; Olivas, A; Smith, J G; Ulmer, K A; Wagner, S R; Zhang, J; Gabareen, A M; Soffer, A; Toki, W H; Wilson, R J; Winklmeier, F; Altenburg, D D; Feltresi, E; Hauke, A; Jasper, H; Merkel, J; Petzold, A; Spaan, B; Wacker, K; Klose, V; Kobel, M J; Lacker, H M; Mader, W F; Nogowski, R; Schubert, J; Schubert, K R; Schwierz, R; Sundermann, J E; Volk, A; Bernard, D; Bonneaud, G R; Latour, E; Lombardo, V; Thiebaux, C; Verderi, M; Clark, P J; Gradl, W; Muheim, F; Playfer, S; Robertson, A I; Watson, J E; Xie, Y; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cecchi, A; Cibinetto, G; Franchini, P; Luppi, E; Negrini, M; Petrella, A; Piemontese, L; Prencipe, E; Santoro, V; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; De Sangro, R; Finocchiaro, G; Pacetti, S; Patteri, P; Peruzzi, I M; Piccolo, M; Rama, M; Zallo, A; Buzzo, A; Contri, R; Lo Vetere, M; Macri, M M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Chaisanguanthum, K S; Morii, M; Wu, J; Dubitzky, R S; Marks, J; Schenk, S; Uwer, U; Bard, D J; Dauncey, P D; Flack, R L; Nash, J A; Panduro-Vazquez, W; Tibbetts, M; Behera, P K; Chai, X; Charles, M J; Mallik, U; Cochran, J; Crawley, H B; Dong, L; Eyges, V; Meyer, W T; Prell, S; Rosenberg, E I; Rubin, A E; Gao, Y Y; Gritsan, A V; Guo, Z J; Lae, C K; Denig, A G; Fritsch, M; Schott, G; Arnaud, N; Bequilleux, J; D'Orazio, A; Davier, M; Grosdidier, G; Höcker, A; Lepeltier, V; Le Diberder, F; Lutz, A M; Pruvot, S; Rodier, S; Roudeau, P; Schune, M H; Serrano, J; Sordini, V; Stocchi, A; Wang, W F; Wormser, G; Lange, D J; Wright, D M; Bingham, I; Burke, J P; Chavez, C A; Fry, J R; Gabathuler, E; Gamet, R; Hutchcroft, D E; Payne, D J; Schofield, K C; Touramanis, C; Bevan, A J; George, K A; Di Lodovico, F; Sacco, R; Cowan, G; Flächer, H U; Hopkins, D A; Paramesvaran, S; Salvatore, F; Wren, A C; Brown, D N; Davis, C L; Allison, J; Bailey, D; Barlow, N R; Barlow, R J; Chia, Y M; Edgar, C L; Lafferty, G D; West, T J; Yi, J I; Anderson, J; Chen, C; Jawahery, A; Roberts, D A; Simi, G; Tuggle, J M; Blaylock, G; Dallapiccola, C; Hertzbach, S S; Li, X; Moore, T B; Salvati, E; Saremi, S; Cowan, R; Dujmic, D; Fisher, P H; Koeneke, K; Sciolla, G; Spitznagel, M; Taylor, F; Yamamoto, R K; Zhao, M; Zheng, Y; Mclachlin, S E; Patel, P M; Robertson, S H; Lazzaro, A; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Sanders, D A; Summers, D J; Zhao, H W; Brunet, S; Côté, D; Simard, M; Taras, P; Viaud, F B; Nicholson, H; De Nardo, Gallieno; Fabozzi, F; Lista, L; Monorchio, D; Sciacca, C; Baak, M A; Raven, G; Snoek, H L; Jessop, C P; Knoepfel, K J; LoSecco, J M; Benelli, G; Corwin, L A; Honscheid, K; Kagan, H; Kass, R; Morris, J P; Rahimi, A M; Regensburger, J J; Sekula, S J; Wong, Q K; Blount, N L; Brau, J E; Frey, R; Igonkina, O; Kolb, J A; Lu, M; Rahmat, R; Sinev, N B; Strom, D; Strube, J; Torrence, E; Gagliardi, N; Gaz, A; Margoni, M; Morandin, M; Pompili, A; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Ben-Haim, E; Briand, H; Calderini, G; Chauveau, J; David, P; Del Buono, L; De La Vaissière, C; Hamon, O; Leruste, P; Malcles, J; Ocariz, J; Pérez, A; Prendki, J; Gladney, L; Biasini, M; Covarelli, R; Manoni, E; Angelini, C; Batignani, G; Bettarini, S; Carpinelli, M; Cenci, R; Cervelli, A; Forti, F; Giorgi, M A; Lusiani, A; Marchiori, G; Mazur, M A; Morganti, M; Neri, N; Paoloni, E; Rizzo, G; Walsh, J J; Biesiada, J; Elmer, P; Lau, Y P; Lü, C; Olsen, J; Smith, A J S; Telnov, A V; Baracchini, E; Bellini, F; Cavoto, G; Del Re, D; Di Marco, E; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Jackson, P D; Li Gioi, L; Mazzoni, M A; Morganti, S; Piredda, G; Polci, F; Renga, F; Voena, C; Ebert, M; Hartmann, T; Schröder, H; Waldi, R; Adye, T; Castelli, G; Franek, B; Olaiya, E O; Röthel, W; Wilson, F F; Emery, S; Escalier, M; Gaidot, A; Ganzhur, S F; Hamel de Monchenault, G; Kozanecki, W; Vasseur, G; Yéche, C; Zito, M; Chen, X R; Liu, H; Park, W; Purohit, M V; White, R M; Wilson, J R; Allen, M T; Aston, D; Bartoldus, R; Bechtle, P; Claus, R; Coleman, J P; Convery, M R; Dingfelder, J C; Dorfan, J; Dubois-Felsmann, G P; Dunwoodie, W; Field, R C; Glanzman, T; Gowdy, S J; Graham, M T; Grenier, P; Hast, C; Innes, W R; Kaminski, J; Kelsey, M H; Kim, H; Kim, P; Kocian, M L; Leith, D W G S; Li, S; Luitz, S; Lüth, V; Lynch, H L; MacFarlane, D B; Marsiske, H; Messner, R; Müller, D R; O'Grady, C P; Ofte, I; Perazzo, A; Perl, M; Pulliam, T; Ratcliff, B N; Roodman, A; Salnikov, A A; Schindler, R H; Schwiening, J; Snyder, A; Su, D; Sullivan, M K; Suzuki, K; Swain, S K; Thompson, J M; Vavra, J; Wagner, A P; Weaver, M; Wisniewski, W J; Wittgen, M; Wright, D H; Yarritu, A K; Yi, K; Young, C C; Ziegler, V; Burchat, P R; Edwards, A J; Majewski, S A; Miyashita, T S; Petersen, B A; Wilden, L; Ahmed, S; Alam, M S; Bula, R; Ernst, J A; Jain, V; Pan, B; Saeed, M A; Wappler, F R; Zain, S B; Krishnamurthy, M; Spanier, S M; Eckmann, R; Ritchie, J L; Ruland, A M; Schilling, C J; Schwitters, R F; Izen, J M; Lou, X C; Ye, S; Bianchi, F; Gallo, F; Gamba, D; Pelliccioni, M; Bomben, M; Bosisio, L; Cartaro, C; Cossutti, F; Della Ricca, G; Lanceri, L; Vitale, L; Azzolini, V; Lopez-March, N; Martínez-Vidal, F; Milanes, D A; Oyanguren, A; Albert, J; Banerjee, Sw; Bhuyan, B; Hamano, K; Kowalewski, R; Nugent, I M; Roney, J M; Sobie, R J; Harrison, P F; Ilic, J; Latham, T E; Mohanty, G B; Band, H R; Chen, X; Dasu, S; Flood, K T; Hollar, J J; Kutter, P E; Pan, Y; Pierini, M; Prepost, R; Wu, S L; Neal, H

    2007-01-01

    A search for charmonium and other new states is performed in a study of exclusive initial-state-radiation production of D Dbar events from electron-positron annihilations at a center-of-mass energy of 10.58 GeV. The data sample corresponds to an integrated luminosity of 384 fb-1 and was recorded by the BABAR experiment at the PEP-II storage ring. The D Dbar mass spectrum shows clear evidence of the psi(3770) plus other structures near 3.9, 4.1, and 4.4 GeV/c^2. No evidence for Y(4260) -> D Dbar is observed, leading to an upper limit of B(Y(4260) -> D Dbar)/B(Y(4260) -> J/psi pi+ pi-) < 1.0 at 90 % confidence level.

  16. Open system quantum dynamics with correlated initial states, not completely positive maps and non-Markovianity

    CERN Document Server

    Devi, A R Usha; Sudha,

    2010-01-01

    Dynamical A and B maps have been employed extensively by Sudarshan and co-workers to investigate open system evolution of quantum systems. A canonical structure of the A-map is introduced here. It is shown that this canonical A-map enables us to investigate if the dynamics is completely positive (CP) or non-completely positive (NCP) in an elegant way and hence, it subsumes the basic results on open system dynamics. Identifying memory effects in open system evolution is gaining increasing importance recently and here, a criterion of non-Markovianity, based on the relative entropy of the dynamical state is proposed. The relative entropy difference of the dynamical system serves as a complementary characterization - though not related directly - to the fidelity difference criterion proposed recently. Three typical examples of open system evolution of a qubit, prepared initially in a correlated state with another qubit (environment), and evolving jointly under a specific unitary dynamics - which corresponds to a ...

  17. Mine Burial Assessment State-of the Art in Prediction and Modeling Workshop and Initiation of Technical Program

    Science.gov (United States)

    2000-09-30

    Mine Burial Assessment State-of the Art in Prediction and Modeling Workshop and Initiation of Technical Program Richard H. Bennett SEAPROBE, Inc 501...Assessment State-of the Art in Prediction and Modeling Workshop and Initiation of Technical Program 5a. CONTRACT NUMBER 5b. GRANT NUMBER 5c. PROGRAM... Technical Program , Agenda, Background, and References, Bennett and Wilkens, 2000. d. Completed Reviews of the state-of-the-art practices in Mine Burial

  18. Initiatives of cross-border regional planning in Matamoros-Brownsville (Mexico-United States

    Directory of Open Access Journals (Sweden)

    Xavier Oliveras González

    2016-03-01

    Full Text Available Cross-border regional planning is a recent phenomenon, which its first initiatives date back to 1960s. Currently some experiences have been conducted, most of them in Europe. The weak development of this phenomenon lies on the obstacles and limitations that it has to deal with. Those obstacles derive from the asymmetries between the political and administrative systems, urban and spatial policies, land planning and land uses, etc. on each side of an international border. In a great extent, cross-border planning has been theoretically approached from an institutional construction perspective. However, in this research it has been adopted the symbolic regional construction perspective that allows to analyze cross-border regional planning through spatial imaginaries. In this sense, crossborder planning is understood as a result of the interaction between regional actors and the social constructed values and meanings (geographical, cultural, social, economic, historical, etc. given to border and cross-border regions. This investigation pursues, in first place, to determine the spatial imaginaries on which cross-border planning is constructed and, at the same time, the spatial imaginaries that cross-border planning reproduces; in second place, to determine in which way cross-border planning contributes to deactivate the border (deborder or, on the contrary, to reproduce and reinforce the spatial differentiation process (the process by which two contiguous national or bordered spaces build spatial discontinuities as a way to distinguish of each other. To achieve these objectives, it has been conducted a content analysis based on the documentation of the spatial and urban planning and of the cross-border initiatives from a case study area; a direct observation of an ongoing cross-border initiative; and interviews to key informants (planning agencies and other organizations related to cross-border initiatives. In the Mexico-United States border region

  19. Initial validation of a numeric zero to ten scale to measure children's state anxiety.

    Science.gov (United States)

    Crandall, Margie; Lammers, Cathy; Senders, Craig; Savedra, Marilyn; Braun, Jerome V

    2007-11-01

    Although children experience physical and behavioral consequences from anxiety in many health care settings, anxiety assessment and subsequent management is not often performed because of the lack of clinically useful subjective scales. Current state anxiety scales are either observational or multidimensional self-report measures requiring significant clinician and patient time. Because anxiety is subjective, in this pilot study, we evaluated the validity of a self-report numeric 0-10 anxiety scale that is easy to administer to children in the clinical setting. A descriptive correlation research design was used to determine the concurrent validity for a numeric 0-10 anxiety scale with the state portion of the State-Trait Anxiety Inventory for Children (STAIC). During clinic preoperative visits, 60 children, 7-13 yr, provided anxiety scores for the 0-10 scale and the STAIC pre- and posteducation. Simple linear regression and Pearson correlation were performed to determine the strength of the relationship. STAIC was associated with the anxiety scale both preeducation (beta = 1.20, SE[beta] = 0.34, F[1,58] = 12.74, P = 0.0007) and posteducation (beta = 1.97, SE[beta]) = 0.31, F[1,58] = 40.11, P initial study supports the validity of the numeric 0-10 anxiety self-report scale to assess state anxiety in children as young as 7 yr.

  20. Exploiting jet binning to identify the initial state of high-mass resonances

    CERN Document Server

    Ebert, Markus A; Moult, Ian; Stewart, Iain W; Tackmann, Frank J; Tackmann, Kerstin; Zeune, Lisa

    2016-01-01

    If a new high-mass resonance is discovered at the Large Hadron Collider, model-independent techniques to identify the production mechanism will be crucial to understand its nature and effective couplings to Standard Model particles. We present a powerful and model-independent method to infer the initial state in the production of any high-mass color-singlet system by using a tight veto on accompanying hadronic jets to divide the data into two mutually exclusive event samples (jet bins). For a resonance of several hundred GeV, the jet binning cut needed to discriminate quark and gluon initial states is in the experimentally accessible range of several tens of GeV. It also yields comparable cross sections for both bins, making this method viable already with the small event samples available shortly after a discovery. Theoretically, the method is made feasible by utilizing an effective field theory setup to compute the jet cut dependence precisely and model-independently and to systematically control all source...

  1. Exploiting jet binning to identify the initial state of high-mass resonances

    Science.gov (United States)

    Ebert, Markus A.; Liebler, Stefan; Moult, Ian; Stewart, Iain W.; Tackmann, Frank J.; Tackmann, Kerstin; Zeune, Lisa

    2016-09-01

    If a new high-mass resonance is discovered at the Large Hadron Collider, model-independent techniques to identify the production mechanism will be crucial to understand its nature and effective couplings to Standard Model particles. We present a powerful and model-independent method to infer the initial state in the production of any high-mass color-singlet system by using a tight veto on accompanying hadronic jets to divide the data into two mutually exclusive event samples (jet bins). For a resonance of several hundred GeV, the jet binning cut needed to discriminate quark and gluon initial states is in the experimentally accessible range of several tens of GeV. It also yields comparable cross sections for both bins, making this method viable already with the small event samples available shortly after a discovery. Theoretically, the method is made feasible by utilizing an effective field theory setup to compute the jet cut dependence precisely and model independently and to systematically control all sources of theoretical uncertainties in the jet binning, as well as their correlations. We use a 750 GeV scalar resonance as an example to demonstrate the viability of our method.

  2. RECREATION MONITORING OF RESOURCE CONDITIONS IN THE KRONOTSKY STATE NATURAL BIOSPHERE PRESERVE (KAMCHATKA: AN INITIAL ASSESSMENT

    Directory of Open Access Journals (Sweden)

    Anna Zavadskaya

    2011-01-01

    Full Text Available The paper describes assessment and monitoring program which has been designed and initiated for monitoring recreational impacts in some wildernesses areas of Kamchatka. The framework of the recreational assessment was tested through its application in a case study conducted during the summer 2008 in the Kronotsky State Natural Biosphere Preserve (the Kamchatka peninsula, Russia. The overall objective of the case study was to assess the existing campsite and trail recreation impacts and to establish a network of key sites for the subsequent long-term impact monitoring. The detailed assessment of different components of natural complexes of the Kronotsky State Natural Preserve and the obtained maps of their ecological conditions showed that some sites had been highly disturbed. The results of these works have given rise to a concern that the intensive use of these areas would make an unacceptable impact on the nature. Findings of our initial work corroborate the importance of founding wilderness management programs on knowledge about the trail and campsite impacts and emphasize the necessity of adopting the recreational assessment and monitoring framework to the practice of decision-making.

  3. From Initial Nucleation to Cassie-Baxter State of Condensed Droplets on Nanotextured Superhydrophobic Surfaces

    Science.gov (United States)

    Lv, Cunjing; Zhang, Xiwen; Niu, Fenglei; He, Feng; Hao, Pengfei

    2017-02-01

    Understanding how droplet condensation happens plays an essential role for our fundamental insights of wetting behaviors in nature and numerous applications. Since there is a lack of study of the initial formation and growing processes of condensed droplets down to nano-/submicroscale, relevant underlying mechanisms remain to be explored. We report an in situ observation of vapor condensation on nano-/microtextured superhydrophobic surfaces using optical microscopy. An interesting picture of the vapor condensation, from the initial appearance of individual small droplets (≤1 μm) to a Cassie-Baxter wetting state (>30 μm), are exhibited. It is found that individual droplets preferentially nucleate at the top and the edge of single micropillars with very high apparent contact angles on the nanotextures. Scenarios of two distinguished growing modes are reported statistically and the underlying mechanisms are discussed in the view of thermodynamics. We particularly reveal that the formation of the Cassie-Baxter wetting state is a result of a continuous coalescence of individual small droplets, in which the nanotexture-enhanced superhydrophobicity plays a crucial role. We envision that these fundamental findings can deepen our understanding of the nucleation and development of condensed droplets in nanoscale, so as to optimize design strategies of superhydrophobic materials for a broad range of water-harvesting and heat-transfer systems.

  4. Exploiting jet binning to identify the initial state of high-mass resonances

    Energy Technology Data Exchange (ETDEWEB)

    Ebert, Markus A.; Liebler, Stefan; Tackmann, Frank J.; Tackmann, Kerstin [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Moult, Ian; Stewart, Iain W. [Massachusetts Institute of Technology, Cambridge, MA (United States). Center for Theoretical Physics; Zeune, Lisa [NIKHEF, Amsterdam (Netherlands). Theory Group

    2016-05-15

    If a new high-mass resonance is discovered at the Large Hadron Collider, model-independent techniques to identify the production mechanism will be crucial to understand its nature and effective couplings to Standard Model particles. We present a powerful and model-independent method to infer the initial state in the production of any high-mass color-singlet system by using a tight veto on accompanying hadronic jets to divide the data into two mutually exclusive event samples (jet bins). For a resonance of several hundred GeV, the jet binning cut needed to discriminate quark and gluon initial states is in the experimentally accessible range of several tens of GeV. It also yields comparable cross sections for both bins, making this method viable already with the small event samples available shortly after a discovery. Theoretically, the method is made feasible by utilizing an effective field theory setup to compute the jet cut dependence precisely and model-independently and to systematically control all sources of theoretical uncertainties in the jet binning, as well as their correlations. We use a 750 GeV scalar resonance as an example to demonstrate the viability of our method.

  5. Influence of the initial state of carbon nanotubes on their colloidal stability under natural conditions

    Energy Technology Data Exchange (ETDEWEB)

    Schwyzer, Irene [Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-9014 St. Gallen (Switzerland); Eawag - Swiss Federal Institute of Aquatic Science and Technology, CH-8600 Duebendorf (Switzerland); Kaegi, Ralf; Sigg, Laura [Eawag - Swiss Federal Institute of Aquatic Science and Technology, CH-8600 Duebendorf (Switzerland); Magrez, Arnaud [EPFL - Ecole Polytechnique Federale de Lausanne, CH-1015 Lausanne (Switzerland); Nowack, Bernd, E-mail: nowack@empa.ch [Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-9014 St. Gallen (Switzerland)

    2011-06-15

    The colloidal stability of dry and suspended carbon nanotubes (CNTs) in the presence of amphiphilic compounds (i.e. natural organic matter or surfactants) at environmentally realistic concentrations was investigated over several days. The suspensions were analyzed for CNT concentration (UV-vis spectroscopy), particle size (nanoparticle tracking analysis), and CNT length and dispersion quality (TEM). When added in dry form, around 1% of the added CNTs remained suspended. Pre-dispersion in organic solvent or anionic detergent stabilized up to 65% of the added CNTs after 20 days of mild shaking and 5 days of settling. The initial state of the CNTs (dry vs. suspended) and the medium composition hence are critical determinants for the partitioning of CNTs between sediment and the water column. TEM analysis revealed that single suspended CNTs were present in all suspensions and that shaking and settling resulted in a fractionation of the CNTs with shorter CNTs remaining predominantly in suspension. - Highlights: > Individually suspended CNTs are present under environment relevant conditions. > The number of suspended CNTs varies depending on the medium composition. > Surfactants at environmental concentrations have no suspending effect on dry CNTs. > Pre-dispersed CNTs are more stable in suspension than dry CNTs. - The colloidal stability of CNTs varies a lot depending on the initial state of the CNTs (dry vs. pre-dispersed), the applied dispersant for pre-suspension, and the composition of the medium.

  6. On the robustness of near term climate predictability regarding initial state uncertainties

    Science.gov (United States)

    Germe, Agathe; Sévellec, Florian; Mignot, Juliette; Swingedouw, Didier; Nguyen, Sebastien

    2017-01-01

    A set of four ensemble simulations has been designed to assess the relative importance of atmospheric, oceanic, and deep ocean initial state uncertainties, as represented by spatial white noise perturbations, on seasonal to decadal prediction skills in a perfect model framework. It is found that a perturbation mimicking random oceanic uncertainties have the same impact as an atmospheric-only perturbation on the future evolution of the ensemble after the first 3 months, even if they are initially only located in the deep ocean. This is due to the fast (1 month) perturbation of the atmospheric component regardless of the initial ensemble generation strategy. The divergence of the ensemble upper-ocean characteristics is then mainly induced by ocean-atmosphere interactions. While the seasonally varying mixed layer depth allows the penetration of the different signals in the thermocline in the mid-high latitudes, the rapid adjustment of the thermocline to wind anomalies followed by Kelvin and Rossby waves adjustment dominates the growth of the ensemble spread in the tropics. These mechanisms result in similar ensemble distribution characteristics for the four ensembles design strategy at the interannual timescale.

  7. Binary neutron star merger simulations with different initial orbital frequency and equation of state

    CERN Document Server

    Maione, Francesco; Feo, Alessandra; Löffler, Frank

    2016-01-01

    We present results from three-dimensional general relativistic simulations of binary neutron star coalescences and mergers using public codes. We considered equal mass models where the baryon mass of the two Neutron Stars (NS) is $1.4M_{\\odot}$, described by four different equations of state (EOS) for the cold nuclear matter (APR4, SLy, H4, and MS1; all parametrized as piecewise polytropes). We started the simulations from four different initial interbinary distances ($40, 44.3, 50$, and $60$ km), including up to the last 16 orbits before merger. That allows to show the effects on the gravitational wave phase evolution, radiated energy and angular momentum due to: the use of different EOSs, the orbital eccentricity present in the initial data and the initial separation (in the simulation) between the two stars. Our results show that eccentricity has a major role in the discrepancy between numerical and analytical waveforms until the very last few orbits, where "tidal" effects and missing high-order post-Newto...

  8. Environmental aspects, strategies and waste logistic system based on the example of metallurgical company

    Directory of Open Access Journals (Sweden)

    Božena Gajdzik

    2009-01-01

    Full Text Available The aim of this article is to present the key elements of environmental management system in metallurgical companies. This companies in use the Cleaner Production Strategy. All modern strategies are based on dynamic environmental model. Production processes still create waste and pollution although a significant amount is now recycled. For example in metallurgical companies located in the Polish market about 80% of solid waste is recycled. The minimization or complete removal of damages caused by metallurgical production are a necessary and important aspect of maintaining a competitive edge.

  9. Who manages financial risk? An empirical examination of risk management practices in the romanian metallurgical industry

    Directory of Open Access Journals (Sweden)

    S. G. Anton

    2013-10-01

    Full Text Available The aim of the paper is to analyze risk management practice adopted by the Romanian metallurgical enterprises and to identify new tools for hedging price risk. Romanian metallurgical companies recognize the main risks that their businesses are facing: increased prices of raw materials and energy, foreign exchange risk, and lower (domestic demand for company’s products. Another important finding is that the perception of financial risks has improved in the last years and the companies started to use financial derivatives in order to hedge some financial risks. Nevertheless, Romanian metallurgical companies have proved to be reluctant to fully implement and adhere to suffi cient risk management practices.

  10. Search for Charmonium States Decaying to J/\\psi\\gamma \\gamma $ Using Initial-State Radiation Events

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B.; Barate, R.; Bona, M.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Tisserand, V.; Zghiche, A.; Grauges, E.; /Barcelona U., ECM; Palano,; /Bari U. /INFN, Bari; Chen, J.C.; Qi, N.D.; Rong, G.; Wang, P.; Zhu, Y.S.; /Beijing, Inst. High Energy Phys.; Eigen, G.; Ofte, I.; Stugu, B.; /Bergen U.; Abrams, G.S.; /LBL,

    2006-11-30

    We study the processes e{sup +}e{sup -} {yields} (J/{psi}{gamma}{gamma}){gamma} and e{sup +}e{sup -} {yields} (J/{psi}{pi}{sup -}{pi}{sup +}){gamma} where the hard photon radiated from an initial e{sup +}e{sup -} collision with center-of-mass (CM) energy near 10.58 GeV is detected. In the final state J/{psi}{gamma}{gamma} we consider J/{psi}{pi}{sup 0}, J/{psi}{eta}, {chi}{sub c1}{gamma}, and {chi}c{sub 2}{gamma} candidates. The invariant mass of the hadronic final state defines the effective e{sup +}e{sup -} CM energy in each event, so these data can be compared with direct e{sup +}e{sup -} measurements. We report 90% CL upper limits for the integrated cross section times branching fractions of the J/{psi}{gamma}{gamma} channels in the Y (4260) mass region.

  11. Relativistic and noise effects on multiplayer Prisoners' dilemma with entangling initial states

    Science.gov (United States)

    Goudarzi, H.; Rashidi, S. S.

    2017-06-01

    Three-players Prisoners' dilemma (Alice, Bob and Colin) is studied in the presence of a single collective environment effect as a noise. The environmental effect is coupled with final states by a particular form of Kraus operators K_0 and K_1 through amplitude damping channel. We introduce the decoherence parameter 0≤ p≤ 1 to the corresponding noise matrices, in order to controling the rate of environment influence on payoff of each players. Also, we consider the Unruh effect on the payoff of player, who is located at a noninertial frame. We suppose that two players (Bob and Colin) are in Rindler region I from Minkowski space-time, and move with same uniform acceleration (r_b=r_c ) and frequency mode. The game is begun with the classical strategies cooperation (C) and defection (D) accessible to each player. Furthermore, the players are allowed to access the quantum strategic space (Q and M). The quantum entanglement is coupled with initial classical states by the parameter γ \\in [0,π /2] . Using entangled initial states by exerting an unitary operator \\hat{J} as entangling gate, the quantum game (competition between Prisoners, as a three-qubit system) is started by choosing the strategies from classical or quantum strategic space. Arbitrarily chosen strategy by each player can lead to achieving profiles, which can be considered as Nash equilibrium or Pareto optimal. It is shown that in the presence of noise effect, choosing quantum strategy Q results in a winning payoff against the classical strategy D and, for example, the strategy profile (Q, D, C) is Pareto optimal. We find that the unfair miracle move of Eisert from quantum strategic space is an effective strategy for accelerated players in decoherence mode (p=1 ) of the game.

  12. New results on Initial State and Quarkonia with ALICE arXiv

    CERN Document Server

    INSPIRE-00537162

    The study of quarkonia in heavy-ion collisions has been the subject of intense experimental and theoretical effort, ever since their production was predicted to be sensitive to the formation of a deconfined state of strongly-interacting matter, known as the Quark-Gluon Plasma (QGP). In p-Pb collisions, Cold Nuclear Matter (CNM) effects, such as nuclear shadowing or partonic energy loss, are expected to influence quarkonium production. The study of such system is therefore crucial to shed light on the mechanisms taking place at the initial-state of quarkonium production, and to disentangle the cold and hot nuclear effects envisioned in Pb-Pb collisions. The ALICE experiment at the LHC, is capable of reconstructing J/$\\psi$, $\\psi$(2S) and $\\Upsilon$ states at forward rapidity through their $\\mu^{\\rm{+}}\\mu^{\\rm{-}}$ decay channel, as well as J/$\\psi$ at central rapidity through their $e^{\\rm{+}}e^{\\rm{-}}$ decay channel, down to zero transverse momentum. A review of the main ALICE findings from the measurement...

  13. Multi-initialized States Referred Work Parameter Calibration for Gaze Tracking Human-Robot Interaction

    Directory of Open Access Journals (Sweden)

    Qijie Zhao

    2012-09-01

    Full Text Available In order to adaptively calibrate the work parameters in the infrared‐TV based eye gaze tracking Human‐Robot Interaction (HRI system, a kind of gaze direction sensing model has been provided for detecting the eye gaze identified parameters. We paid more attention to situations where the user’s head was in a different position to the interaction interface. Furthermore, the algorithm for automatically correcting work parameters of the system has also been put up by defining certain initial reference system states and analysing the historical information of the interaction between a user and the system. Moreover, considering some application cases and factors, and relying on minimum error rate Bayesian decision‐making theory, a mechanism for identifying system state and adaptively calibrating parameters has been proposed. Finally, some experiments have been done with the established system and the results suggest that the proposed mechanism and algorithm can identify the system work state in multi‐ situations, and can automatically correct the work parameters to meet the demands of a gaze tracking HRI system.

  14. Measuring Psychobiosocial States in Sport: Initial Validation of a Trait Measure

    Science.gov (United States)

    Bertollo, Maurizio; Ruiz, Montse C.; Bortoli, Laura

    2016-01-01

    We examined the item characteristics, the factor structure, and the concurrent validity of a trait measure of psychobiosocial states. In Study 1, Italian athletes (N = 342, 228 men, 114 women, Mage = 23.93, SD = 6.64) rated the intensity, the frequency, and the perceived impact dimensions of a psychobiosocial states scale, trait version (PBS-ST), which is composed of 20 items (10 functional and 10 dysfunctional) referring to how they usually felt before an important competition. In Study 2, the scale was cross validated in an independent sample (N = 251, 181 men, 70 women, Mage = 24.35, SD = 7.25). The concurrent validity of the PBS-ST scale scores were also examined in comparison with two sport-specific emotion-related measures and a general measure of affect. Exploratory structural equation modeling and confirmatory factor analysis of the data of Study 1 showed that a 2-factor, 15-item solution of the PBS-ST scale (8 functional items and 7 dysfunctional items) reached satisfactory fit indices for the three dimensions (i.e., intensity, frequency, and perceived impact). Results of Study 2 provided evidence of substantial measurement and structural invariance of all dimensions across samples. The low association of the PBS-ST scale with other measures suggests that the scale taps unique constructs. Findings of the two studies offer initial validity evidence for a sport-specific tool to measure psychobiosocial states. PMID:27907111

  15. Bending Priorities: a Study in Policy Framing. State of Michigan’s Brownfield Initiative

    Directory of Open Access Journals (Sweden)

    Richard HULA

    2009-10-01

    Full Text Available This paper explores the political process bywhich the state of Michigan successfully crafted andimplemented such a brownfield initiative. Althoughthe primary focus here is on the experience of asingle state, the lessons to be learned from thiscase have national and international implicationsbecause Michigan is a leader in brownfieldprograms. The paper begins with a review of thegeneral policy context in which state brownfieldpolicy is made. Particular attention is given tothe widespread dissatisfaction of a variety ofstakeholders with long dominant federal programsin the area of environmental cleanups. The secondsection outlines a number of fundamental legislativeand administrative changes that have beenimplemented in Michigan environmental policyover the past decade. Section three reviews thebroad literature on issue framing and considershow it might help identify the specific mechanismsby which the innovative brownfield program wasadopted. The final section provides an informal testof elements of the issue-framing model by exploringin some detail the convergence of public opinionwith key elements of the innovative policy, andwhether there was any significant shift in publicopinion over time.

  16. Measuring Psychobiosocial States in Sport: Initial Validation of a Trait Measure.

    Science.gov (United States)

    Robazza, Claudio; Bertollo, Maurizio; Ruiz, Montse C; Bortoli, Laura

    2016-01-01

    We examined the item characteristics, the factor structure, and the concurrent validity of a trait measure of psychobiosocial states. In Study 1, Italian athletes (N = 342, 228 men, 114 women, Mage = 23.93, SD = 6.64) rated the intensity, the frequency, and the perceived impact dimensions of a psychobiosocial states scale, trait version (PBS-ST), which is composed of 20 items (10 functional and 10 dysfunctional) referring to how they usually felt before an important competition. In Study 2, the scale was cross validated in an independent sample (N = 251, 181 men, 70 women, Mage = 24.35, SD = 7.25). The concurrent validity of the PBS-ST scale scores were also examined in comparison with two sport-specific emotion-related measures and a general measure of affect. Exploratory structural equation modeling and confirmatory factor analysis of the data of Study 1 showed that a 2-factor, 15-item solution of the PBS-ST scale (8 functional items and 7 dysfunctional items) reached satisfactory fit indices for the three dimensions (i.e., intensity, frequency, and perceived impact). Results of Study 2 provided evidence of substantial measurement and structural invariance of all dimensions across samples. The low association of the PBS-ST scale with other measures suggests that the scale taps unique constructs. Findings of the two studies offer initial validity evidence for a sport-specific tool to measure psychobiosocial states.

  17. PECULIARITIES OF CHOICE OF BURNER DEVICES FOR HEATING FURNACES OF MACHINE-BUILDING AND METALLURGICAL PRODUCTIONS

    Directory of Open Access Journals (Sweden)

    S. V. Korneev

    2010-01-01

    Full Text Available It is shown that the choice of recuperative burners is more reasonable for different types of heating furnaces of machine-building and metallurgical productions of little efficiency.

  18. Effects of the interplay between initial state and Hamiltonian on the thermalization of isolated quantum many-body systems.

    Science.gov (United States)

    Torres-Herrera, E J; Santos, Lea F

    2013-10-01

    We explore the role of the initial state on the onset of thermalization in isolated quantum many-body systems after a quench. The initial state is an eigenstate of an initial Hamiltonian H(I) and it evolves according to a different final Hamiltonian H(F). If the initial state has a chaotic structure with respect to H(F), i.e., if it fills the energy shell ergodically, thermalization is certain to occur. This happens when H(I) is a full random matrix, because its states projected onto H(F), are fully delocalized. The results for the observables then agree with those obtained with thermal states at infinite temperature. However, finite real systems with few-body interactions, as the ones considered here, are deprived of fully extended eigenstates, even when described by a nonintegrable Hamiltonian. We examine how the initial state delocalizes as it gets closer to the middle of the spectrum of H(F), causing the observables to approach thermal averages, be the models integrable or chaotic. Our numerical studies are based on initial states with energies that cover the entire lower half of the spectrum of one-dimensional Heisenberg spin-1/2 systems.

  19. A new approach for evaluating water hammer including the initial state of pressurization of the installation and fluid

    Directory of Open Access Journals (Sweden)

    G. Kaless

    2016-04-01

    Full Text Available The water hammer phenomenon is well known since the 19th century, while its mathematical formulation, by means of differential equations, is due to works of researchers such us Allievi (1903 and others from the beginning of the 20th century. The equations found in the technical publications produce a strange water hammer when the initial condition is defined assuming an incompressible fluid and a rigid pipe. The correct solution requires solving the water hammer equations for the initial state. When the finite difference method is applied, the initial state is solved by means of a set of non-linear equations. A novel approach is proposed including the initial state of pressurization into the governing equations and hence simplifying the calculus of the initial conditions. Furthermore, a critical reading of the deduction of the equations is done pointing out conceptual inconsistencies and proposing corrections.

  20. Localized Bioconvection Patterns and Their Initial State Dependency in Euglena gracilis Suspensions in an Annular Container

    Science.gov (United States)

    Shoji, Erika; Nishimori, Hiraku; Awazu, Akinori; Izumi, Shunsuke; Iima, Makoto

    2014-04-01

    Localized patterns of bioconvection in Euglena gracilis suspensions were experimentally analyzed in an annular container. Near the critical mean density of convection, we succeeded in isolating two basic types of localized convection patterns. One was an almost stationary pattern consisting of two convection cells centered by an isolated high-density region of the microorganism where a downflow was generated, which we call a "bioconvection unit". The other was a traveling wave pattern consisting of an array of moving high-density waves bounded in a certain area. The effect of the mean density of E. gracilis on the emergence of the localized convection pattern was also examined. Near the critical mean density, we found that the emergence probability of the localized convection pattern depends on the initial state, i.e., whether E. gracilis has a uniform or localized distribution, which suggests that the system is bistable. Such bistability is often accompanied by localized structures in spatially extended dissipative systems.

  1. Two Temperature Magneto-Thermoelasticity with Initial Stress: State Space Formulation

    Directory of Open Access Journals (Sweden)

    Sunita Deswal

    2013-01-01

    Full Text Available Magneto-thermoelastic interactions in an initially stressed isotropic homogeneous elastic half-space with two temperatures are studied using mathematical methods under the purview of the L-S model of linear theory of generalized thermoelasticity. The formalism deals with the state space approach with the purpose of counteracting the difficulties of handling the displacement potential functions. Of specific concern here is the propagation of waves owing to ramp type increase in temperature and load. The medium is considered to be permeated by a uniform magnetic field. The expressions for different field parameters such as displacement, temperature, strain, and stress in the physical domain are obtained by applying a numerical inversion technique. Results of some earlier workers have been deduced from the present formulation. Numerical work is also performed for a suitable material with the aim of illustrating the results.

  2. Robust consensus tracking control for multiagent systems with initial state shifts, disturbances, and switching topologies.

    Science.gov (United States)

    Meng, Deyuan; Jia, Yingmin; Du, Junping

    2015-04-01

    This paper deals with the consensus tracking control issues of multiagent systems and aims to solve them as accurately as possible over a finite time interval through an iterative learning approach. Based on the iterative rule, distributed algorithms are proposed for every agent using its nearest neighbor knowledge, for which the robustness problem is addressed against initial state shifts, disturbances, and switching topologies. These uncertainties are dynamically changing not only along the time axis but also the iteration axis. It is shown that the matrix norm conditions can be developed to achieve the convergence of the considered consensus tracking objectives, for which necessary and sufficient conditions are presented in terms of linear matrix inequalities to guarantee their feasibility in the sense of the spectral norm. Furthermore, simulation examples are given to illustrate the effectiveness and robustness of the obtained consensus tracking results.

  3. The initial and final state of SNe Ia from the single degenerate model

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    Although type Ia supernovae(SNe Ia) show their importance in many astrophysical fields,the nature of the progenitors of SNe Ia is still unclear.At present,the single degenerate(SD) model is presented to be a very likely progenitor model.Following the comprehensive SD model developed by Meng & Yang(2010),we show the initial and final state of the progenitor systems of SNe Ia in an orbital period—the secondary mass(log Pi,M2i) plane.Our results may explain the location of some supersoft X-ray sources and recurrent novae in the(log Pi,M2i) plane,and be helpful to judge whether an SD system is the potential progenitor system of SNe Ia,as well as to simulate the interaction between SN ejecta and its companion.

  4. Initial and Final State Interaction Effects in Small-x Quark Distributions

    Energy Technology Data Exchange (ETDEWEB)

    Xiao, Bo-Wen; Yuan, Feng

    2010-08-30

    We study the initial and final state interaction effects in the transverse momentum dependent parton distributions in the small-x saturation region. In particular, we discuss the quark distributions in the semi-inclusive deep inelastic scattering, Drell-Yan lepton pair production and dijet-correlation processes in pA collisions. We calculate the quark distributions in the scalar-QED model and then extend to the color glass condensate formalism in QCD. The quark distributions are found universal between the DIS and Drell-Yan processes. On the other hand, the quark distribution from the qq'-->qq' channel contribution to the dijet-correlation process is not universal. However, we find that it can be related to the quark distribution in DIS process by a convolution with the normalized unintegrated gluon distribution in the CGC formalism in the large Nc limit.

  5. Initial state-specific photodissociation dynamics of pyrrole via 1 π σ ∗/ S 0 conical intersection initiated with optimally controlled UV-laser pulses

    Science.gov (United States)

    Nandipati, K. R.; Kanakati, Arun Kumar; Singh, H.; Lan, Z.; Mahapatra, S.

    2017-09-01

    Optimal initiation of quantum dynamics of N-H photodissociation of pyrrole on the S 0-1 π σ ∗(1 A 2) coupled electronic states by UV-laser pulses in an effort to guide the subsequent dynamics to dissociation limits is studied theoretically. Specifically, the task of designing optimal laser pulses that act on initial vibrational states of the system for an effective UV-photodissociation is considered by employing optimal control theory. The associated control mechanism(s) for the initial state dependent photodissociation dynamics of pyrrole in the presence of control pulses is examined and discussed in detail. The initial conditions determine implicitly the variation in the dissociation probabilities for the two channels, upon interaction with the field. The optimal pulse corresponds to the objective fixed as maximization of overall reactive flux subject to constraints of reasonable fluence and quantum dynamics. The simple optimal pulses obtained by the use of genetic algorithm based optimization are worth an experimental implementation given the experimental relevance of π σ ∗-photochemistry in recent times.

  6. Correlations between indebtness grade and the value of companies in metallurgical industry of Romania

    Directory of Open Access Journals (Sweden)

    C. Oprean

    2015-07-01

    Full Text Available The purpose of this paper is to identify the influence of degree of indebtedness, the level of equity capital and the net result on the value of metallurgical companies, represented by their market value. The paper presents a model developed based on data of 10 companies listed on the Bucharest Stock Exchange (BSE in the period 2004-2013, which operates in the metallurgical industry in Romania.

  7. Autonomous and professional maintenance in metallurgical enterprise as activities within total productive maintenance

    OpenAIRE

    2014-01-01

    The content of this publication consists of notions connected with Total Productive Maintenance (TPM) in metallurgical enterprise. The basic areas of devices condition management through Autonomous and Professional Maintenance are described here. Mentioned areas of activities are performed in metallurgical enterprise ArcelorMittal Poland within pillars of World Class Manufacturing (WCM). The aims of UR programs are to maintain the basic functionality of the devices and decrease the number of ...

  8. Autonomous and professional maintenance in metallurgical enterprise as activities within total productive maintenance

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2014-04-01

    Full Text Available The content of this publication consists of notions connected with Total Productive Maintenance (TPM in metallurgical enterprise. The basic areas of devices condition management through Autonomous and Professional Maintenance are described here. Mentioned areas of activities are performed in metallurgical enterprise ArcelorMittal Poland within pillars of World Class Manufacturing (WCM. The aims of UR programs are to maintain the basic functionality of the devices and decrease the number of failures in order to reach improvement of production efficiency.

  9. Development of market strategies of metallurgical enterrprises after restructuring of steel industry

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2014-01-01

    Full Text Available Before metallurgical enterprises started implementation of marketing activities they had to go through restructuring processes which included all areas of their market activities. Privatised metallurgical enterprises after economic transformation gradually implemented marketing to their business activities. The article presents notions connected with development of marketing strategies from the period of last 20 years. The range of analysis includes categories corresponding with instruments of mix marketing (4P − product, price, place, promotion.

  10. Binary neutron star merger simulations with different initial orbital frequency and equation of state

    Science.gov (United States)

    Maione, F.; De Pietri, R.; Feo, A.; Löffler, F.

    2016-09-01

    We present results from three-dimensional general relativistic simulations of binary neutron star coalescences and mergers using public codes. We considered equal mass models where the baryon mass of the two neutron stars is 1.4{M}⊙ , described by four different equations of state (EOS) for the cold nuclear matter (APR4, SLy, H4, and MS1; all parametrized as piecewise polytropes). We started the simulations from four different initial interbinary distances (40,44.3,50, and 60 km), including up to the last 16 orbits before merger. That allows us to show the effects on the gravitational wave (GW) phase evolution, radiated energy and angular momentum due to: the use of different EOS, the orbital eccentricity present in the initial data and the initial separation (in the simulation) between the two stars. Our results show that eccentricity has a major role in the discrepancy between numerical and analytical waveforms until the very last few orbits, where ‘tidal’ effects and missing high-order post-Newtonian coefficients also play a significant role. We test different methods for extrapolating the GW signal extracted at finite radii to null infinity. We show that an effective procedure for integrating the Newman-Penrose {\\psi }4 signal to obtain the GW strain h is to apply a simple high-pass digital filter to h after a time domain integration, where only the two physical motivated integration constants are introduced. That should be preferred to the more common procedures of introducing additional integration constants, integrating in the frequency domain or filtering {\\psi }4 before integration.

  11. Do state traditions matter? Comparing deliberative governance initiatives for climate change adaptation in Dutch corporatism and British pluralism

    NARCIS (Netherlands)

    Vink, M.J.; Benson, D.; Boezeman, D.; Cook, H.E.; Dewulf, A.R.P.J.; Termeer, C.J.A.M.

    2015-01-01

    In the emerging field of climate adaptation, deliberative governance initiatives are proposed to yield better adaptation strategies. However, introducing these network-centred deliberations between public and private players may contrast with traditions of interest intermediation between state and s

  12. High Penetration Solar PV Deployment Sunshine State Solar Grid Initiative (SUNGRIN)

    Energy Technology Data Exchange (ETDEWEB)

    Meeker, Rick [Nhu Energy, Inc., Tallahassee, FL (United States); Florida State Univ., Tallahassee, FL (United States); Steurer, Mischa [Florida State Univ., Tallahassee, FL (United States); Faruque, MD Omar [Florida State Univ., Tallahassee, FL (United States); Langston, James [Florida State Univ., Tallahassee, FL (United States); Schoder, Karl [Florida State Univ., Tallahassee, FL (United States); Ravindra, Harsha [Florida State Univ., Tallahassee, FL (United States); Hariri, Ali [Florida State Univ., Tallahassee, FL (United States); Moaveni, Houtan [New York Power Authority (NYPA), New York (United States); University of Central Florida, Florida Solar Energy Center, Cocoa, FL (Unitied States); Click, Dave [ESA Renewables, LLC, Sanford, FL (United States); University of Central Florida, Florida Solar Energy Center, Cocoa, FL (United States); Reedy, Bob [University of Central Florida, Florida Solar Energy Center, Cocoa, FL (United States)

    2015-05-31

    The report provides results from the Sunshine State Solar Grid Initiative (SUNGRIN) high penetration solar PV deployment project led by Florida State University’s (FSU) Center for Advanced Power Systems (CAPS). FSU CAPS and industry and university partners have completed a five-year effort aimed at enabling effective integration of high penetration levels of grid-connected solar PV generation. SUNGRIN has made significant contributions in the development of simulation-assisted techniques, tools, insight and understanding associated with solar PV effects on electric power system (EPS) operation and the evaluation of mitigation options for maintaining reliable operation. An important element of the project was the partnership and participation of six major Florida utilities and the Florida Reliability Coordinating Council (FRCC). Utilities provided details and data associated with actual distribution circuits having high-penetration PV to use as case studies. The project also conducted foundational work supporting future investigations of effects at the transmission / bulk power system level. In the final phase of the project, four open-use models with built-in case studies were developed and released, along with synthetic solar PV data sets, and tools and techniques for model reduction and in-depth parametric studies of solar PV impact on distribution circuits. Along with models and data, at least 70 supporting MATLAB functions have been developed and made available, with complete documentation.

  13. Study of the Exclusive Initial State RadiationProduction of the D \\bar D System

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B.

    2006-09-07

    A study of exclusive production of the D{bar D} system through initial-state radiation is performed in a search for charmonium states, where D = D{sup 0} or D{sup +}. The D{sup 0} mesons are reconstructed in the D{sup 0} {yields} K{sup -}{pi}{sup +}, D{sup 0} {yields} K{sup -}{pi}{sup +}{pi}{sup 0}, and D{sup 0} {yields} K{sup -}{pi}{sup +}{pi}{sup +}{pi}{sup -} decay modes. The D{sup +} is reconstructed through the D{sup +} {yields} K{sup -}{pi}{sup +}{pi}{sup +} decay mode. The analysis makes use of an integrated luminosity of 288.5 fb{sup -1} collected by the BABAR experiment. The D{bar D} mass spectrum shows a clear {psi}(3770) signal. Further structures appear in the 3.9 and 4.1 GeV/c{sup 2} regions. No evidence is found for Y(4260) decays to D{bar D}, implying an upper limit {Beta}(Y(4260) {yields} D{bar D})/{Beta}(Y(4260) {yields} J/{psi}{pi}{sup +}{pi}{sup -}) < 7.6 (95% confidence level).

  14. The French-German initiative for Chernobyl. Programme 1 safety state of the sarcophagus

    Energy Technology Data Exchange (ETDEWEB)

    Pretzsch, G.; Roloff, R.; Roloff, R.; Artmann, A. [Gesellschaft fur Anlagenund Reaktorsicherheit (GRS) (Germany); Lhomme, V. [Institut de Radioprotection et de Surete Nucleaire, 92 - Fontenay-aux-Roses (France); Berberich, G. [Erftstadt-Gymnich (Germany); Selesnew, A

    2005-07-01

    The data collected and processed within the framework of the French-German Initiative are an excellent basis for the intended specialist application at the Chernobyl Centre as well as for an extended use in connection with the restoration of the Sarcophagus as part of the 'Shelter Implementation Plan' performed under the auspices of the European Bank for Reconstruction and Development. The major goals of the S.I.P. are the stabilisation of the existing Sarcophagus and the erection of a New Safe Confinement (N.S.C.) around the already existing Sarcophagus, the degasifier wing and the turbine building.This N.S.C. is to safely confine the radioactive materials for at least 100 years and is to allow their retrieval from inside if need be as well as the dismantling of the old structure.In addition, the database can be used for obtaining information needed for project descriptions, safety analysis reports, etc. The Ukrainian safety authority S.N.R.C.U. (State Nuclear Regulatory Committee of Ukraine) and its technical safety organisation, the State Scientific-Technical Center (S.S.T.C.), have also signaled their interest in using the database.Further information on the F.G.I. and on the 'Radioecology and Health Programmes' can be found at: www.fgi1-chernobyl.de.vu; www.grs.de, www.irsn.fr; www.fgi.icc.gov.ua. (N.C.)

  15. Study of the Exclusive Initial-State Radiation Production of the $D \\bar D$ System

    CERN Document Server

    Aubert, B; Bóna, M; Boutigny, D; Couderc, F; Karyotakis, Yu; Lees, J P; Poireau, V; Tisserand, V; Zghiche, A; Graugès-Pous, E; Palano, A; Chen, J C; Qi, N D; Rong, G; Wang, P; Zhu, Y S; Eigen, G; Ofte, I; Stugu, B; Abrams, G S; Battaglia, M; Brown, D N; Button-Shafer, J; Cahn, R N; Charles, E; Gill, M S; Groysman, Y; Jacobsen, R G; Kadyk, J A; Kerth, L T; Kolomensky, Yu G; Kukartsev, G; Lynch, G; Mir, L M; Orimoto, T J; Pripstein, M; Roe, N A; Ronan, M T; Wenzel, W A; Del Amo-Sánchez, P; Barrett, M; Ford, K E; Hart, A J; Harrison, T J; Hawkes, C M; Morgan, S E; Watson, A T; Held, T; Koch, H; Lewandowski, B; Pelizaeus, M; Peters, K; Schröder, T; Steinke, M; Boyd, J T; Burke, J P; Cottingham, W N; Walker, D; Asgeirsson, D J; Çuhadar-Dönszelmann, T; Fulsom, B G; Hearty, C; Knecht, N S; Mattison, T S; McKenna, J A; Khan, A; Kyberd, P; Saleem, M; Sherwood, D J; Teodorescu, L; Blinov, V E; Bukin, A D; Druzhinin, V P; Golubev, V B; Onuchin, A P; Serednyakov, S I; Skovpen, Yu I; Solodov, E P; Todyshev, K Yu; Best, D S; Bondioli, M; Bruinsma, M; Chao, M; Curry, S; Eschrich, I; Kirkby, D; Lankford, A J; Lund, P; Mandelkern, M A; Mommsen, R K; Röthel, W; Stoker, D P; Abachi, S; Buchanan, C; Foulkes, S D; Gary, J W; Long, O; Shen, B C; Wang, K; Zhang, L; Hadavand, H K; Hill, E J; Paar, H P; Rahatlou, S; Sharma, V; Berryhill, J W; Campagnari, C; Cunha, A; Dahmes, B; Hong, T M; Kovalskyi, D; Richman, J D; Beck, T W; Eisner, A M; Flacco, C J; Heusch, C A; Kroseberg, J; Lockman, W S; Nesom, G; Schalk, T; Schumm, B A; Seiden, A; Spradlin, P; Williams, D C; Wilson, M G; Albert, J; Chen, E; Dvoretskii, A; Fang, F; Hitlin, D G; Narsky, I; Piatenko, T; Porter, F C; Ryd, A; Samuel, A; Mancinelli, G; Meadows, B T; Mishra, K; Sokoloff, M D; Blanc, F; Bloom, P C; Chen, S; Ford, W T; Hirschauer, J F; Kreisel, A; Nagel, M; Nauenberg, U; Olivas, A; Ruddick, W O; Smith, J G; Ulmer, K A; Wagner, S R; Zhang, J; Chen, A; Eckhart, E A; Soffer, A; Toki, W H; Wilson, R J; Winklmeier, F; Zeng, Q; Altenburg, D D; Feltresi, E; Hauke, A; Jasper, H; Merkel, J; Petzold, A; Spaan, B; Brandt, T; Klose, V; Lacker, H M; Mader, W F; Nogowski, R; Schubert, J; Schubert, K R; Schwierz, R; Sundermann, J E; Volk, A; Bernard, D; Bonneaud, G R; Latour, E; Thiebaux, C; Verderi, M; Clark, P J; Gradl, W; Muheim, F; Playfer, S; Robertson, A I; Xie, Y; Andreotti, M; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Luppi, E; Negrini, M; Petrella, A; Piemontese, L; Prencipe, E; Anulli, F; Baldini-Ferroli, R; Calcaterra, A; De Sangro, R; Finocchiaro, G; Pacetti, S; Patteri, P; Peruzzi, I M; Piccolo, M; Rama, M; Zallo, A; Buzzo, A; Capra, R; Contri, R; Lo Vetere, M; Macri, M M; Monge, M R; Passaggio, S; Patrignani, C; Robutti, E; Santroni, A; Tosi, S; Brandenburg, G; Chaisanguanthum, K S; Morii, M; Wu, J; Dubitzky, R S; Marks, J; Schenk, S; Uwer, U; Bard, D; Bhimji, W; Bowerman, D A; Dauncey, P D; Egede, U; Flack, R L; Nash, J A; Nikolich, M B; Panduro-Vazquez, W; Behera, P K; Chai, X; Charles, M J; Mallik, U; Meyer, N T; Ziegler, V; Cochran, J; Crawley, H B; Dong, L; Eyges, V; Meyer, W T; Prell, S; Rosenberg, E I; Rubin, A E; Gritsan, A V; Denig, A G; Fritsch, M; Schott, G; Arnaud, N; Davier, M; Grosdidier, G; Höcker, A; Le Diberder, F R; Lepeltier, V; Lutz, A M; Oyanguren, A; Pruvot, S; Rodier, S; Roudeau, P; Schune, M H; Stocchi, A; Wang, W F; Wormser, G; Cheng, C H; Lange, D J; Wright, D M; Chavez, C A; Forster, I J; Fry, J R; Gabathuler, E; Gamet, R; George, K A; Hutchcroft, D E; Payne, D J; Schofield, K C; Touramanis, C; Bevan, A J; Di Lodovico, F; Menges, W; Sacco, R; Cowan, G; Flächer, H U; Hopkins, D A; Jackson, P S; McMahon, T R; Ricciardi, S; Salvatore, F; Wren, A C; Davis, C L; Allison, J; Barlow, N R; Barlow, R J; Chia, Y M; Edgar, C L; Lafferty, G D; Naisbit, M T; Williams, J C; Yi, J I; Chen, C; Hulsbergen, W D; Jawahery, A; Lae, C K; Roberts, D A; Simi, G; Blaylock, G; Dallapiccola, C; Hertzbach, S S; Li, X; Moore, T B; Saremi, S; Stängle, H; Cowan, R; Sciolla, G; Sekula, S J; Spitznagel, M; Taylor, F; Yamamoto, R K; Kim, H; Mclachlin, S E; Patel, P M; Robertson, S H; Lazzaro, A; Lombardo, V; Palombo, F; Bauer, J M; Cremaldi, L; Eschenburg, V; Godang, R; Kroeger, R; Sanders, D A; Summers, D J; Zhao, H W; Brunet, S; Côté, D; Simard, M; Taras, P; Viaud, F B; Nicholson, H; Cavallo, N; De Nardo, Gallieno; Fabozzi, F; Gatto, C; Lista, L; Monorchio, D; Paolucci, P; Piccolo, D; Sciacca, C; Baak, M A; Raven, G; Snoek, H L; Jessop, C P; LoSecco, J M; Allmendinger, T; Benelli, G; Corwin, L A; Gan, K K; Honscheid, K; Hufnagel, D; Jackson, P D; Kagan, H; Kass, R; Rahimi, A M; Regensburger, J J; Ter-Antonian, R; Wong, Q K; Blount, N L; Brau, J E; Frey, R; Igonkina, O; Kolb, J A; Lu, M; Rahmat, R; Sinev, N B; Strom, D; Strube, J; Torrence, E; Gaz, A; Margoni, M; Morandin, M; Pompili, A; Posocco, M; Rotondo, M; Simonetto, F; Stroili, R; Voci, C; Benayoun, M; Briand, H; Chauveau, J; David, P; Del Buono, L; La Vaissière, C de; Hamon, O; Hartfiel, B L; John, M J J; Leruste, P; Malcles, J; Ocariz, J; Roos, L; Therin, G; Gladney, L; Panetta, J; Biasini, M; Covarelli, R; Angelini, C; Batignani, G; Bettarini, S; Bucci, F; Calderini, G; Carpinelli, M; Cenci, R; Forti, F; Giorgi, M A; Lusiani, A; Marchiori, G; Mazur, M A; Morganti, M; Neri, N; Rizzo, G; Walsh, J J; Haire, M; Judd, D; Wagoner, D E; Biesiada, J; Danielson, N; Elmer, P; Lau, Y P; Lü, C; Olsen, J; Smith, A J S; Telnov, A V; Bellini, F; Cavoto, G; D'Orazio, A; Del Re, D; Di Marco, E; Faccini, R; Ferrarotto, F; Ferroni, F; Gaspero, M; Li Gioi, L; Mazzoni, M A; Morganti, S; Piredda, G; Polci, F; Safai-Tehrani, F; Voena, C; Ebert, M; Schröder, H; Waldi, R; Adye, T; De Groot, N; Franek, B; Olaiya, E O; Wilson, F F; Aleksan, R; Emery, S; Gaidot, A; Ganzhur, S F; Hamel de Monchenault, G; Kozanecki, Witold; Legendre, M; Vasseur, G; Yéche, C; Zito, M; Chen, X R; Liu, H; Park, W; Purohit, M V; Wilson, J R; Allen, M T; Aston, D; Bartoldus, R; Bechtle, P; Berger, N; Claus, R; Coleman, J P; Convery, M R; Cristinziani, M; Dingfelder, J C; Dorfan, J; Dubois-Felsmann, G P; Dujmic, D; Dunwoodie, W M; Field, R C; Glanzman, T; Gowdy, S J; Graham, M T; Grenier, P; Halyo, V; Hast, C; Hrynóva, T; Innes, W R; Kelsey, M H; Kim, P; Leith, D W G S; Li, S; Luitz, S; Lüth, V; Lynch, H L; MacFarlane, D B; Marsiske, H; Messner, R; Müller, D R; O'Grady, C P; Ozcan, V E; Perazzo, A; Perl, M; Pulliam, T; Ratcliff, B N; Roodman, A; Salnikov, A A; Schindler, R H; Schwiening, J; Snyder, A; Stelzer, J; Su, D; Sullivan, M K; Suzuki, K; Swain, S K; Thompson, J M; Vavra, J; van, N; Bakel; Weaver, M; Weinstein, A J R; Wisniewski, W J; Wittgen, M; Wright, D H; Yarritu, A K; Yi, K; Young, C C; Burchat, P R; Edwards, A J; Majewski, S A; Petersen, B A; Roat, C; Wilden, L; Ahmed, S; Alam, M S; Bula, R; Ernst, J A; Jain, V; Pan, B; Saeed, M A; Wappler, F R; Zain, S B; Bugg, W; Krishnamurthy, M; Spanier, S M; Eckmann, R; Ritchie, J L; Satpathy, A; Schilling, C J; Schwitters, R F; Izen, J M; Lou, X C; Ye, S; Bianchi, F; Gallo, F; Gamba, D; Bomben, M; Bosisio, L; Cartaro, C; Cossutti, F; Della Ricca, G; Dittongo, S; Lanceri, L; Vitale, L; Azzolini, V; Lopez-March, N; Martínez-Vidal, F; Banerjee, Sw; Bhuyan, B; Brown, C M; Fortin, D; Hamano, K; Kowalewski, R V; Nugent, I M; Roney, J M; Sobie, R J; Back, J J; Harrison, P F; Latham, T E; Mohanty, G B; Pappagallo, M; Band, H R; Chen, X; Cheng, B; Dasu, S; Datta, M; Flood, K T; Hollar, J J; Kutter, P E; Mellado, B; Mihályi, A; Pan, Y; Pierini, M; Prepost, R; Wu, S L; Yu, Z; Neal, H

    2006-01-01

    A study of exclusive production of the $D \\bar D$ system through initial-state r adiation is performed in a search for charmonium states, where $D=D^0$ or $D^+$. The $D^0$ mesons are reconstructed in the $D^0 \\to K^- \\pi^+$, $D^0 \\to K^- \\pi^+ \\pi^0$, and $D^0 \\to K^- \\pi^+ \\pi^+ \\pi^-$ decay modes. The $D^+$ is reconstructed through the $D^+ \\to K^- \\pi^+ \\pi^+$ decay mode. The analysis makes use of an integrated luminosity of 288.5 fb$^{-1}$ collected by the BaBar experiment. The $D \\bar D$ mass spectrum shows a clear $\\psi(3770)$ signal. Further structures appear in the 3.9 and 4.1 GeV/$c^2$ regions. No evidence is found for Y(4260) decays to $D \\bar D$, implying an up per limit $\\frac{\\BR(Y(4260)\\to D \\bar D)}{\\BR(Y(4260)\\to J/\\psi \\pi^+ \\pi^-)} < 7.6$ (95 % confidence level).

  16. Recent advances in understanding physical properties of metallurgical slags

    Science.gov (United States)

    Min, Dong Joon; Tsukihashi, Fumitaka

    2017-01-01

    Present-day knowledge of the structure and physical properties of metallurgical slags is summarized to address structure-property and inter-property relationships. Physical properties of slags including viscosity, electrical conductivity, and surface tension is reviewed focusing on the effect of slag structure, which is comprehensively evaluated using FT-IT, Raman, and MAS-NMR spectroscopy. The effect of the slag composition on slag structure and property is reviewed in detail: Compositional effect encompasses traditional concepts of basicity, network-forming behaviors of anions, and secondary impact of network-modifying cations. Secondary objective of this review is elucidating the mutual relationship between physical properties of slags. For instance, the relationship between slag viscosity and electrical conductivity is suggested by Walden's rule and discussed based on the experimental results. Slag foaming index is also introduced as a comprehensive understanding method of physical properties of slags. The dimensional analysis was made to address the effect of viscosity, density, and surface tension on the foaming index of slags.

  17. Metallurgical analysis of lithium test assembly operated for 1200 h

    Energy Technology Data Exchange (ETDEWEB)

    Furukawa, Tomohiro, E-mail: furukawa.tomohiro@jaea.go.jp [Japan Atomic Energy Agency, 4002 Narita, O-arai, Ibaraki 311-1393 (Japan); Kondo, Hiroo; Kanemura, Takuji; Hirakawa, Yasuhi [Japan Atomic Energy Agency, 4002 Narita, O-arai, Ibaraki 311-1393 (Japan); Yamaoka, Nobuo; Hoashi, Eiji; Suzuki-Yoshihashi, Sachiko; Horiike, Hiroshi [Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871 (Japan)

    2014-10-15

    Highlights: • The assembly was used for the lithium free-surface flow experiments at 300 °C. • The integrity of steel was decreased due to carburizing from lithium. • It was proven that carbon control in lithium is important for corrosion protection. - Abstract: A lithium test assembly used for lithium-free surface flow experiments at 300 °C for 1200 h at Osaka University was analyzed metallographically to verify the design of the lithium target of the International Fusion Materials Irradiation Facility (IFMIF). Certain irregularities such as traces of high-speed lithium flow at a maximum velocity of 15 m/s were observed at the tip of the nozzle. Mottled unevenness with numerous microcracks a few microns deep was detected at the inlet of the nozzle, the velocity ratio of which was 0.1–0.4 as compared with the nozzle tip. A thin, altered layer developed on the surface of these regions because of carbide formation. It is believed that the microcracks were nucleated by thermal transients at the start or stop of operations of the lithium loop. These slight irregularities could be the result of exfoliation of the altered layer because of the high-speed lithium flow caused by the increased hardness of the altered layer as compared with that of the base metal. The metallurgical analysis proved for the first time that carbon control in lithium is also important for corrosion and erosion protection of the IFMIF components.

  18. 77 FR 20381 - Silver State Solar Power North, LLC; Supplemental Notice That Initial Market-Based Rate Filing...

    Science.gov (United States)

    2012-04-04

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Silver State Solar Power North, LLC; Supplemental Notice That Initial Market... in the above-referenced proceeding of Silver State Solar Power North, LLC's application for...

  19. 76 FR 64341 - Silver State Solar Power North LLC; Supplemental Notice That Initial Market-Based Rate Filing...

    Science.gov (United States)

    2011-10-18

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission Silver State Solar Power North LLC; Supplemental Notice That Initial Market... in the above-referenced proceeding of Silver State Solar Power North, LLC's application for...

  20. Positive XPS binding energy shift of supported Cu{sub N}-clusters governed by initial state effects

    Energy Technology Data Exchange (ETDEWEB)

    Peters, S.; Peredkov, S. [Technische Universität Berlin, IOAP, Strasse des 17. Juni 135, 10623 Berlin (Germany); Al-Hada, M. [Department of Physics, College of Education and Linguistics, University of Amran (Yemen); Neeb, M., E-mail: matthias.neeb@helmholtz-berlin.de [Helmholtz-Zentrum Berlin, Wilhelm-Conrad-Röntgen-Campus Adlershof, Elektronenspeicherring BESSY II, Albert-Einstein-Straße 15, 12489 Berlin (Germany); Eberhardt, W. [Technische Universität Berlin, IOAP, Strasse des 17. Juni 135, 10623 Berlin (Germany); DESY, Center for Free Electron Laser Science (CFEL), Notkestr. 85, 22607 Hamburg (Germany)

    2014-01-01

    Highlights: • Size dependent initial and final state effects of mass-selected deposited clusters. • Initial state effect dominates positive XPS shift in supported Cu-clusters. • Size dependent Coulomb correlation shift in the Auger final state of Cu cluster. • Size-dependent Auger parameter analysis. • Positive XPS shift differs from negative surface core level shift in crystalline copper. - Abstract: An initial state effect is established as origin for the positive 2p core electron binding energy shift found for Cu{sub N}-clusters supported by a thin silica layer of a p-doped Si(1 0 0) wafer. Using the concept of the Auger parameter and taking into account the usually neglected Coulomb correlation shift in the Auger final state (M{sub 4,5}M{sub 4,5}) it is shown that the initial state shift is comparable to the measured XPS shift while the final state relaxation shift contributes only marginally to the binding energy shift. The cluster results differ from the negative surface core-level shift of crystalline copper which has been explained in terms of a final state relaxation effect.

  1. INITIAL METABOLIC STATE AND EXERCISE-INDUCED ENDOTOXAEMIA ARE UNRELATED TO GASTROINTESTINAL SYMPTOMS DURING EXERCISE

    Directory of Open Access Journals (Sweden)

    José Moncada-Jiménez

    2009-06-01

    Full Text Available The aim of the study was to investigate the association between the initial metabolic state and exercise-induced endotoxaemia on the appearance of gastrointestinal symptoms (GIS during exercise. Eleven males (36.6 ± 4.9 yrs, 1.7 ± 0.1 m, 74.5 ± 7.7 kg, DEXA body fat % 17.2 ± 6.6, VO2max 57.4 ± 7.4 ml·kg-1·min-1 underwent two isoenergetic diets designed to change their initial metabolic status by either depleting or maintaining their hepatic and muscular glycogen content. These diets and accompanying exercise sessions were performed by each participant in the days before completing a laboratory-based duathlon (5-km run, 30-km cycling, 10-km run. Blood samples were obtained before, immediately and 1- and 2-h following the duathlon for determination of insulin (IN, glucagon (GL, endotoxin, aspartic aminotransferase (AST, and alanine aminotransferase (ALT markers. GIS were assessed by survey before and after exercise. Diet content produced a different energy status as determined by macronutrient content and the IN/GL ratio (p < 0.05, and mild exercise-induced endotoxaemia was observed in both experimental duathlons. Regardless of the diet, the AST/ALT ratio following exercise and in the recovery phase indicated hepatocyte and liver parenchyma structural damage. In spite of GIS, no significant correlations between endotoxin levels and GIS were found. In conclusion, increased markers of endotoxaemia observed with the high-intensity exercise were unrelated to hepatic function and/or GIS before and after exercise

  2. Anisotropic non-gaussianity from rotational symmetry breaking excited initial states

    Energy Technology Data Exchange (ETDEWEB)

    Ashoorioon, Amjad [INFN - Sezione di Bologna, IS FLAG,viale B. Pichat 6/2, I-40127 Bologna (Italy); Casadio, Roberto [INFN - Sezione di Bologna, IS FLAG,viale B. Pichat 6/2, I-40127 Bologna (Italy); Dipartimento di Fisica e Astronomia, Alma Mater Università di Bologna,via Irnerio 46, 40126 Bologna (Italy); Koivisto, Tomi [Nordita, KTH Royal Institute of Technology and Stockholm University,Roslagstullsbacken 23, SE-10691 Stockholm (Sweden)

    2016-12-01

    If the initial quantum state of the primordial perturbations broke rotational invariance, that would be seen as a statistical anisotropy in the angular correlations of the cosmic microwave background radiation (CMBR) temperature fluctuations. This can be described by a general parameterisation of the initial conditions that takes into account the possible direction-dependence of both the amplitude and the phase of particle creation during inflation. The leading effect in the CMBR two-point function is typically a quadrupole modulation, whose coefficient is analytically constrained here to be |B|≲0.06. The CMBR three-point function then acquires enhanced non-gaussianity, especially for the local configurations. In the large occupation number limit, a distinctive prediction is a modulation of the non-gaussianity around a mean value depending on the angle that short and long wavelength modes make with the preferred direction. The maximal variations with respect to the mean value occur for the configurations which are coplanar with the preferred direction and the amplitude of the non-gaussianity increases (decreases) for the short wavelength modes aligned with (perpendicular to) the preferred direction. For a high scale model of inflation with maximally pumped up isotropic occupation and ϵ≃0.01 the difference between these two configurations is about 0.27, which could be detectable in the future. For purely anisotropic particle creation, the non-Gaussianity can be larger and its anisotropic feature very sharp. The non-gaussianity can then reach f{sub NL}∼30 in the preferred direction while disappearing from the correlations in the orthogonal plane.

  3. Anisotropic non-gaussianity from rotational symmetry breaking excited initial states

    Science.gov (United States)

    Ashoorioon, Amjad; Casadio, Roberto; Koivisto, Tomi

    2016-12-01

    If the initial quantum state of the primordial perturbations broke rotational invariance, that would be seen as a statistical anisotropy in the angular correlations of the cosmic microwave background radiation (CMBR) temperature fluctuations. This can be described by a general parameterisation of the initial conditions that takes into account the possible direction-dependence of both the amplitude and the phase of particle creation during inflation. The leading effect in the CMBR two-point function is typically a quadrupole modulation, whose coefficient is analytically constrained here to be |B| lesssim 0.06. The CMBR three-point function then acquires enhanced non-gaussianity, especially for the local configurations. In the large occupation number limit, a distinctive prediction is a modulation of the non-gaussianity around a mean value depending on the angle that short and long wavelength modes make with the preferred direction. The maximal variations with respect to the mean value occur for the configurations which are coplanar with the preferred direction and the amplitude of the non-gaussianity increases (decreases) for the short wavelength modes aligned with (perpendicular to) the preferred direction. For a high scale model of inflation with maximally pumped up isotropic occupation and epsilonsimeq 0.01 the difference between these two configurations is about 0.27, which could be detectable in the future. For purely anisotropic particle creation, the non-Gaussianity can be larger and its anisotropic feature very sharp. The non-gaussianity can then reach 0fNL ~ 3 in the preferred direction while disappearing from the correlations in the orthogonal plane.

  4. Invertibility of the retarded response functions for initial mixed states: application to one-body reduced density matrix functional theory

    CERN Document Server

    Giesbertz, Klaas J H

    2016-01-01

    In [J. Chem. Phys. 143, 054102 (2015)] I have derived conditions to characterize the kernel of the retarded response function, under the assumption that the initial state is a ground state. In this article I demonstrate its generalization to mixed states (ensembles). To make the proof work, the weights in the ensemble need to be decreasing for increasing energies of the pure states from which the mixed state is constructed. The resulting conditions are not easy to verify, but under the additional assumptions that the ensemble weights are directly related to the energies and that the full spectrum of the Hamiltonian participates in the ensemble, it is shown that potentials only belong to the kernel of the retarded response function if they commute with the initial Hamiltonian. These additional assumptions are valid for thermodynamic ensembles, which makes this result also physically relevant. The conditions on the potentials for the thermodynamic ensembles are much stronger than in the pure state (zero tempera...

  5. Moving the Barricades to Physical Activity: A Qualitative Analysis of Open Streets Initiatives Across the United States.

    Science.gov (United States)

    Eyler, Amy A; Hipp, J Aaron; Lokuta, Julie

    2015-01-01

    Ciclovía, or Open Streets initiatives, are events where streets are opened for physical activity and closed to motorized traffic. Although the initiatives are gaining popularity in the United States, little is known about planning and implementing them. The goals of this paper are to explore the development and implementation of Open Streets initiatives and make recommendations for increasing the capacity of organizers to enhance initiative success. Phenomenology with qualitative analysis of structured interviews was used. Study setting was urban and suburban communities in the United States. Study participants were organizers of Open Streets initiatives in U.S. cities. Using a list of 47 events held in 2011, 27 lead organizers were interviewed by telephone about planning, implementation, and lessons learned. The interviews were digitally recorded and transcribed. A phenomenologic approach was used, an initial coding tool was developed after reviewing a sample of transcripts, and constant comparative coding methodology was applied. Themes and subthemes were generated from codes. The most common reasons for initiation were to highlight or improve health and transportation. Most initiatives aimed to reach the general population, but some targeted families, children, or specific neighborhoods. Getting people to understand the concept of Open Streets was an important challenge. Other challenges included lack of funding and personnel, and complex logistics. These initiatives democratize public space for citizens while promoting physical activity, social connectedness, and other broad agendas. There are opportunities for the research community to contribute to the expanse and sustainability of Open Streets, particularly in evaluation and dissemination.

  6. Azimuthal anisotropies and initial-state fluctuations from SPS to LHC energies

    CERN Document Server

    Milosevic, Jovan

    2016-01-01

    The $v_{3}$ coefficient, obtained using the PbAu data from the CERES detector at the top SPS energy, is presented. The $v_{2}$ is measured over a $p_{T}$ range up to 100 GeV/c in PbPb collisions collected with the CMS detector. The $v_{2}\\{2\\}$ of charged and strange particles emitted in pp collisions shows a mass ordering effect. The $v_{2}\\{4\\}$ and $v_{2}\\{6\\}$ are comparable to the $v_{2}\\{2\\}$, and thus supports the collective nature of the long-range correlations in high-multiplicity pp collisions at 13~TeV. Principle Component Analysis (PCA) of two-particle harmonics ($V_{n\\Delta}$) is studied in PbPb and high-multiplicity pPb collisions at the LHC. The factorization breaking of the $V_{n\\Delta}$ can be attributed to the effect of initial-state fluctuations (ISF). Using a PCA, the $V_{n\\Delta}$ are characterized through the leading and sub-leading modes. The leading modes are essentially equivalent to the $v_{n}\\{2\\}$. The sub-leading modes represent the largest sources of factorization breaking.

  7. Initial singlet and triplet spin state contributions to -> ppπ0

    Science.gov (United States)

    Thörngren Engblom, P.; Meyer, H. O.; Balewski, J. T.; Daehnick, W. W.; Doskow, J.; Haeberli, W.; Lorentz, B.; Pancella, P. V.; Pollock, R. E.; von Przewoski, B.; Rathmann, F.; Rinckel, T.; Saha, Swapan K.; Schwartz, B.; Wellinghausen, A.; Wise, T.

    2000-01-01

    The PINTEX2http://www.iucf.indiana.edu/~pintex/refid="fn2">2 facility at the IUCF Cooler ring, dedicated to the study of spin dependence in nucleon-nucleon interactions, has been used to measure polarization observables of the reaction -> ppπ0 at beam energies between 325 and 400 MeV. The stored, polarized proton beam had spin projections both in the longitudinal and the transverse directions with respect to the beam momentum. We report here on the measurements of the relative transverse and longitudinal spin-dependent cross sections3Defined as ΔσT(L) = [σ(⇕) + σ(⇕)] - [σ(⇈ + σ(⇊)] where the arrows denote parallel and antiparallel beam/target spin combinations, either transversely (T) or longitudinally (L) polarized.refid="fn3">3, ΔσT/σtot and ΔσL/σtot, and how from these observables the initial spin singlet and triplet cross sections are obtained. Considering angular momentum states less than or equal to one, the contribution of the Ps partial waves to the cross section can be extracted.

  8. Equation of state of initially liquid carbon monoxide and nitrogen mixture

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The modified liquid perturbation variational theory and the improved vdW-1f model were applied to calculating the equation of the state of liquid CO-N2 mixture with the ratio of 1:1, 4:1 and 1:4, respectively, in the shock pressure range of 9-49 GPa. It was shown that the calculated result for CO-N2 mixture with the ratio of 1:1 is well consistent with the earlier experimental data. The thermodynamics equilibrium, chemical equilibrium and phase equilibrium were all considered in detail. It was found that Hugoniot of liquid CO-N2 mixture is moderately softened in the pressure range of 20-30 GPa and 30-49 GPa for different initial proportions, and that the Hugoniot is more softened in the latter pressure range, which means that the structural phase transition occurs near 20 GPa and 30 GPa. Since the shock pro-ductions may absorb a plenty of systematic energy, the shock temperature and pressure decline compared with the case of no chemical reaction. Pressures and temperatures increase gradually with the increase in the mole fraction of nitrogen composition. The results for the 1:1 CO-N2 mixture lie in the middle of two others. Therefore, it was shown that the modified Lorentz-Berthelor rule used in the scheme is effective to study shock-compression properties of liquid CO-N2 mixture under high temperatures and high pressures.

  9. Search for the Supersymmetric Partner to the Top Quark Using Recoils Against Strong Initial State Radiation

    CERN Document Server

    Sun, Siyuan

    The ATLAS experiment at Large Hadron Collider (LHC) searches for experimental evidence of beyond the standard model physics at the TeV scale. As we collect more data at the LHC we continue to extend our sensitivity to these new phenomena, probing for the existence of increasingly massive particles. Despite this progress there are still regions of parameter space where constraints remain weak. One common region where we lack sensitivity is when the new BSM particle has a very small mass splitting between it and its decay products. The BSM particle then has little energy left over to give momenta to its decay products and the low momenta decay products are difficult to experimentally detect. These regions of small mass splitting are called compressed regions. We are able to gain sensitivity to these difficult regions by searching for new particles produced in conjunction with hard initial state radiation (ISR). The hard ISR boosts the new particle’s decay products and gives them momentum. This thesis covers t...

  10. Non-Bunch–Davis initial state reconciles chaotic models with BICEP and Planck

    Directory of Open Access Journals (Sweden)

    Amjad Ashoorioon

    2014-10-01

    Full Text Available The BICEP2 experiment has announced a signal for primordial gravity waves with tensor-to-scalar ratio r=0.2−0.05+0.07 [1]. There are two ways to reconcile this result with the latest Planck experiment [2]. One is by assuming that there is a considerable tilt of r, Tr, with a positive sign, Tr=dln⁡r/dln⁡k≳0.57−0.27+0.29 corresponding to a blue tilt for the tensor modes of order nT≃0.53−0.27+0.29, assuming the Planck experiment best-fit value for tilt of scalar power spectrum nS. The other possibility is to assume that there is a negative running in the scalar spectral index, dnS/dln⁡k≃−0.02 which pushes up the upper bound on r from 0.11 up to 0.26 in the Planck analysis assuming the existence of a tensor spectrum. Simple slow-roll models fail to provide such large values for Tr or negative runnings in nS [1]. In this note we show that a non-Bunch–Davies initial state for perturbations can provide a match between large field chaotic models (like m2ϕ2 with the latest Planck result [3] and BICEP2 results by accommodating either the blue tilt of r or the negative large running of nS.

  11. The role of the transition state in polyatomic reactions: Initial state-selected reaction probabilities of the H + CH4 → H2 + CH3 reaction

    Science.gov (United States)

    Welsch, Ralph; Manthe, Uwe

    2014-11-01

    Full-dimensional calculations of initial state-selected reaction probabilities on an accurate ab initio potential energy surface (PES) have been communicated recently [R. Welsch and U. Manthe, J. Chem. Phys. 141, 051102 (2014)]. These calculations use the quantum transition state concept, the multi-layer multi-configurational time-dependent Hartree approach, and graphics processing units to speed up the potential evaluation. Here further results of these calculations and an extended analysis are presented. State-selected reaction probabilities are given for many initial ro-vibrational states. The role of the vibrational states of the activated complex is analyzed in detail. It is found that rotationally cold methane mainly reacts via the ground state of the activated complex while rotationally excited methane mostly reacts via H-H-CH3-bending excited states of the activated complex. Analyzing the different contributions to the reactivity of the vibrationally states of methane, a complex pattern is found. Comparison with initial state-selected reaction probabilities computed on the semi-empirical Jordan-Gilbert PES reveals the dependence of the results on the specific PES.

  12. The role of the transition state in polyatomic reactions: initial state-selected reaction probabilities of the H + CH₄ → H₂ + CH₃ reaction.

    Science.gov (United States)

    Welsch, Ralph; Manthe, Uwe

    2014-11-07

    Full-dimensional calculations of initial state-selected reaction probabilities on an accurate ab initio potential energy surface (PES) have been communicated recently [R. Welsch and U. Manthe, J. Chem. Phys. 141, 051102 (2014)]. These calculations use the quantum transition state concept, the multi-layer multi-configurational time-dependent Hartree approach, and graphics processing units to speed up the potential evaluation. Here further results of these calculations and an extended analysis are presented. State-selected reaction probabilities are given for many initial ro-vibrational states. The role of the vibrational states of the activated complex is analyzed in detail. It is found that rotationally cold methane mainly reacts via the ground state of the activated complex while rotationally excited methane mostly reacts via H-H-CH3-bending excited states of the activated complex. Analyzing the different contributions to the reactivity of the vibrationally states of methane, a complex pattern is found. Comparison with initial state-selected reaction probabilities computed on the semi-empirical Jordan-Gilbert PES reveals the dependence of the results on the specific PES.

  13. Technical progress report. Private sector initiatives between the United States and Japan. January 1990 - December 1990

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1993-07-01

    OAK A271 This annual report for calendar year 1990 describes the efforts performed under the Private Sector Initiatives contract. The report also describes those efforts that have continued with private funding after being initiated under this contract.

  14. Technical progress report. Private sector initiatives between the United States and Japan. January 1992 - December 1992

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1993-08-01

    OAK A271 This annual report for calendar year 1992 describes the efforts performed under the Private Sector Initiatives contract. The report also describes those efforts that have continued with private funding after being initiated under this contract.

  15. Soluble phosphate fertilizer production using acid effluent from metallurgical industry.

    Science.gov (United States)

    Mattiello, Edson M; Resende Filho, Itamar D P; Barreto, Matheus S; Soares, Aline R; Silva, Ivo R da; Vergütz, Leonardus; Melo, Leônidas C A; Soares, Emanuelle M B

    2016-01-15

    Preventive and effective waste management requires cleaner production strategies and technologies for recycling and reuse. Metallurgical industries produce a great amount of acid effluent that must be discarded in a responsible manner, protecting the environment. The focus of this study was to examine the use of this effluent to increase reactivity of some phosphate rocks, thus enabling soluble phosphate fertilizer production. The effluent was diluted in deionized water with the following concentrations 0; 12.5; 25; 50; 75% (v v(-1)), which were added to four natural phosphate rocks: Araxá, Patos, Bayovar and Catalão and then left to react for 1 h and 24 h. There was an increase in water (PW), neutral ammonium citrate (PNAC) and citric acid (PCA) soluble phosphorus fractions. Such increases were dependent of rock type while the reaction time had no significant effect (p < 0.05) on the chemical and mineralogical phosphate characteristics. Phosphate fertilizers with low toxic metal concentrations and a high level of micronutrients were produced compared to the original natural rocks. The minimum amount of total P2O5, PNAC and PW, required for national legislation for phosphate partially acidulated fertilizer, were met when using Catalão and the effluent at the concentration of 55% (v v(-1)). Fertilizer similar to partially acidulated phosphate was obtained when Bayovar with effluent at 37.5% (v v(-1)) was used. Even though fertilizers obtained from Araxá and Patos did not contain the minimum levels of total P2O5 required by legislation, they can be used as a nutrient source and for acid effluent recycling and reuse. Copyright © 2015 Elsevier Ltd. All rights reserved.

  16. Thermal treatment of dusts from non ferrous metallurgical industries

    Directory of Open Access Journals (Sweden)

    Menad, Noureddine

    2000-06-01

    Full Text Available Three samples of dusts generated by the non ferrous metallurgical industries are treated between 200 and 800 °C in controlled oxidizing and reducing atmospheres. The objective of this study is to recover the valuable metals from these wastes. The treatments of these solids under oxidizing conditions at 700 °C are well adapted for two samples. The totality of valuable elements are concentrated in the treatments' residues. The use of hydrogen at 600 °C, permits the removal of up to 100 % of valuable metals contained in the treated industrial wastes. The recovery rate of valuable metals (Pb, Zn, Cu as well as the Global Decontamination Factor are reported.

    Se han tratado tres muestras procedentes de la industria metalúrgica no férrea entre 200 y 800 °C, en atmósferas oxidantes o reductoras controladas. El objetivo de este estudio es recuperar cuanto sea posible de los elementos valiosos de estos residuos. Los tratamientos bajo condiciones oxidantes a 700 °C han dado buenos resultados en dos muestras, en donde la totalidad de los elementos valiosos se concentraba en los residuos de tratamiento. El uso del hidrógeno a 600 °C permite la separación de hasta el 100 % de los metales valiosos contenidos en los residuos industriales tratados. Finalmente, se detallan las tasas de recuperación de los metales plomo, zinc y cobre así como el factor de descontaminación global (GDF.

  17. Soil contamination with emissions of non-ferrous metallurgical plants

    Science.gov (United States)

    Vodyanitskii, Yu. N.; Plekhanova, I. O.; Prokopovich, E. V.; Savichev, A. T.

    2011-02-01

    The upper soil horizons are strongly contaminated in the area influenced by the Mid-Urals copper smelter. In the technogenic desert and impact zones, the contents of a number of elements (Cu, Zn, As, Pb, P, and S) by many times exceed their clarke values and the maximum permissible concentrations (or provisional permissible concentrations). The degree of technogeneity (Tg) for these elements is very high in these zones. In the far buffer zone, Tg is about zero for many elements and increases up to Tg = 27-42% for four heavy elements (Cu, Zn, Pb, and As) and up to 81-98% for P and S. The buffer capacity of the humus horizon depends on the soil's location within the technogeochemical anomaly and also on the particular pollutant. In the impact zone, it is equal to 70-77% for lead and arsenic, although other technogenic elements (Zn, Cr, S, and P) are poorly retained and readily migrate into the deeper horizons (the buffer capacity is equal to 14-25%). Nearly all the heavy metals enter the soil in the form of sulfides. The soils in the area affected by the Noril'sk mining and smelting metallurgical enterprise are subdivided into two groups according to the degree of their contamination, i.e., the soils within Noril'sk proper and the soils in its suburbs to a distance of 4-15 km. The strongest soil contamination is recorded in the city: the clarke values are exceeded by 287, 78, 16, 4.1, and 3.5 times for Cu, Ni, Cr, Fe, and S, respectively. The major pollutants enter the soil from the ferruginous slag. The soil's contamination degree is lower in the suburbs, where heavy metal sulfides reach the soils with the aerial emission from the enterprise.

  18. Penn State geoPebble system: Design,Implementation, and Initial Results

    Science.gov (United States)

    Urbina, J. V.; Anandakrishnan, S.; Bilen, S. G.; Fleishman, A.; Burkett, P.

    2014-12-01

    The Penn State geoPebble system is a new network of wirelessly interconnected seismic and GPS sensor nodes with flexible architecture. This network will be used for studies of ice sheets in Antarctica and Greenland, as well as to investigate mountain glaciers. The network will consist of ˜150 geoPebbles that can be deployed in a user-defined spatial geometry. We present our design methodology, which has enabled us to develop these state-of- the art sensors using commercial-off-the-shelf hardware combined with custom-designed hardware and software. Each geoPebble is a self- contained, wirelessly connected sensor for collecting seismic measurements and position information. Key elements of each node encompasses a three-component seismic recorder, which includes an amplifier, filter, and 24- bit analog-to-digital converter that can sample up to 10 kHz. Each unit also includes a microphone channel to record the ground-coupled airwave. The timing for each node is available from GPS measurements and a local precision oscillator that is conditioned by the GPS timing pulses. In addition, we record the carrier-phase measurement of the L1 GPS signal in order to determine location at sub-decimeter accuracy (relative to other geoPebbles within a few kilometers radius). Each geoPebble includes 16 GB of solid-state storage, wireless communications capability to a central supervisory unit, and auxiliary measurements capability (including tilt from accelerometers, absolute orientation from magnetometers and temperature). A novel aspect of the geoPebble is a wireless charging system for the internal battery (using inductive coupling techniques). The geoPebbles include all the sensors (geophones, GPS, microphone), communications (WiFi), and power (battery and charging) internally, so the geoPebble system can operate without any cabling connections (though we do provide an external connector so that different geophones can be used). We report initial field-deployment results and

  19. Canada-United States-Mexico Trilateral Cooperation on Childhood Obesity Initiative.

    Science.gov (United States)

    Rabadán-Diehl, Cristina; Safdie, Margarita; Rodin, Rachel

    2016-08-01

    Childhood obesity is an important public health problem that affects countries in the Americas. In 2014, Pan American Health Organization (PAHO) Member States agreed on a Plan of Action for the Prevention of Obesity in Children and Adolescents in an effort to address the impact of this disorder in the Americas region. The interventions laid out in this regional plan are multi-faceted and require multi-sectoral partnerships. Building on a strong history of successful trilateral collaboration, Canada, Mexico, and the United States formed a partnership to address the growing epidemic of childhood obesity in the North American region. This collaborative effort, known as the Trilateral Cooperation on Childhood Obesity Initiative, is the first initiative in the region to address chronic noncommunicable diseases by bringing together technical and policy experts, with strong leadership and support from the secretaries and ministers of health. The Initiative's goals include increasing levels of physical activity and reducing sedentary behavior through 1) increased social mobilization and citizen engagement, 2) community- based outreach, and 3) changes to the built (man-made) environment. This article describes the background and development process of the Initiative; specific goals, activities, and actions achieved to date; and opportunities and next steps. This information may be useful for those forming other partnerships designed to address childhood obesity or other complex public health challenges in the region. RESUMEN La obesidad infantil es un problema de salud pública importante que afecta a los países de las Américas. En el 2014, los Estados Miembros de la Organización Panamericana de la Salud (OPS) acordaron un Plan de acción para la prevención de la obesidad en la niñez y la adolescencia con el fin de hacer frente a las repercusiones de este trastorno en la Región de las Américas. Las intervenciones que componen este plan regional son multifacéticas y

  20. Initial Metabolic State and Exercise-Induced Endotoxaemia Are Unrelated to Gastrointestinal Symptoms During Exercise

    Science.gov (United States)

    Moncada-Jimènez, José; Plaisance, Eric P.; Mestek, Michael L.; Araya-Ramirez, Felipe; Ratcliff, Lance; Taylor, James K.; Grandjean, Peter W.; Aragonvargas, Luis F.

    2009-01-01

    The aim of the study was to investigate the association between the initial metabolic state and exercise-induced endotoxaemia on the appearance of gastrointestinal symptoms (GIS) during exercise. Eleven males (36.6 ± 4.9 yrs, 1.7 ± 0.1 m, 74.5 ± 7.7 kg, DEXA body fat % 17.2 ± 6.6, VO2max 57.4 ± 7.4 ml·kg-1·min-1) underwent two isoenergetic diets designed to change their initial metabolic status by either depleting or maintaining their hepatic and muscular glycogen content. These diets and accompanying exercise sessions were performed by each participant in the days before completing a laboratory-based duathlon (5-km run, 30-km cycling, 10-km run). Blood samples were obtained before, immediately and 1- and 2-h following the duathlon for determination of insulin (IN), glucagon (GL), endotoxin, aspartic aminotransferase (AST), and alanine aminotransferase (ALT) markers. GIS were assessed by survey before and after exercise. Diet content produced a different energy status as determined by macronutrient content and the IN/GL ratio (p < 0.05), and mild exercise-induced endotoxaemia was observed in both experimental duathlons. Regardless of the diet, the AST/ALT ratio following exercise and in the recovery phase indicated hepatocyte and liver parenchyma structural damage. In spite of GIS, no significant correlations between endotoxin levels and GIS were found. In conclusion, increased markers of endotoxaemia observed with the high-intensity exercise were unrelated to hepatic function and/or GIS before and after exercise. Key points Gastrointestinal symptoms before, during, and after a competition are reported by approximately 20%-50% of the athletes participating in endurance events such as marathon, cycling and triathlon. Energy status, exercise-induced endotoxaemia and liver structural damage might be related to gastrointestinal symptoms. In this study, gastrointestinal symptoms observed before and after endurance exercise were unrelated to endotoxin levels or

  1. LibQUAL+® and the Information Commons Initiative at Buffalo State College: 2003 to 2009

    Directory of Open Access Journals (Sweden)

    Eugene J. Harvey

    2013-06-01

    Full Text Available Objective – To examine the effect of a transition to an information commons model of service organization on perceptions of library service quality. In 2003, the E. H. Butler Library at Buffalo State College began development of an Information Commons, which included moving the computing help desk to the library, reorganizing the physical units in the library around functional service areas, and moving the reference desk to the lobby.Methods – In 2003, 2006, and 2009, the library administered the LibQUAL+ survey, which measures the relationship between perceived library service delivery and library user satisfaction. The 2003 survey was conducted before the implementation of the Information Commons Initiative. Analyses of variance were conducted to compare the effect of the service changes on users’ perceptions of library service quality between the three data collection points, as well as to explore differences between undergraduate and graduate students. Results – The analyses revealed significant differences between the three data points, with significantly more positive perceptions of library service quality in 2006 and 2009 than in 2003. Comparisons between 2006 and 2009 were not statistically significant. In 2003, no significant differences were found between undergraduate and graduate students’ perceptions. However, in 2006, undergraduate students perceived higher levels of service quality after the development of the Information Commons than graduate students. This difference was maintained in 2009.Conclusion – The Information Commons has become a popular place for new programming, exhibits, workshops, and cultural events on campus. The library staff and administration have regained the respect of the campus community, as well as an appreciation for user-driven input and feedback and for ongoing assessment and evaluation.

  2. Equation of state of initially liquid carbon monoxide and nitrogen mixture

    Institute of Scientific and Technical Information of China (English)

    YANG JinWen; SUN Dong; SUN Yue; SHI ShangChun

    2008-01-01

    Academy of Engineering Physics,Mianyang 621900,ChinaThe modified liquid perturbation variational theory and the improved vdW-1f model were applied to calculating the equation of the state of liquid CO-N2 mixture with the ratio of 1:1,4:1 and 1:4,respectively,in the shock pressure range of 9-49 Gpa.It was shown that the calculated result for CO-N2 mixture with the ratio of 1:1 is well consistent with the earlier experimental data.The thermodynamics equilibrium,chemical equilibrium and phase equilibrium were all considered in detail.It was found that Hugoniot of liquid CO-N2 mixture is moderately softened in the pressure range of 20-30 Gpa and 30-49 Gpa for different initial proportions,and that the Hugoniot is more softened in the latter pressure range,which means that the structural phase transition occurs near 20 Gpa and 30 Gpa.Since the shock pro-ductions may absorb a plenty of systematic energy,the shock temperature and pressure decline compared with the case of no chemical reaction.Pressures and temperatures increase gradually with the increase in the mole fraction of nitrogen composition.The results for the 1:1 CO-N2 mixture lie in the middle of two others.Therefore,it was shown that the modified Lorentz-Berthelor rule used in the scheme is effective to study shock-compression properties of liquid CO-N2 mixture under high temperatures and high pressures.

  3. Interim initial state report for the safety assessment SR-Can

    Energy Technology Data Exchange (ETDEWEB)

    Pers, Karin (ed.) [Kemakta Konsult AB, Stockholm (Sweden)

    2004-07-01

    A thorough description of the initial state of the engineered parts of the repository system is one of the main bases for the SR-Can safety assessment. The initial state refers to the state at the time of deposition for the spent fuel and the engineered barriers and the natural, undisturbed state at the time of beginning of excavation for the repository for the geosphere and the biosphere. The repository system is based on the KBS-3 method, where copper canisters with a cast iron insert containing spent nuclear fuel are surrounded by bentonite clay and deposited at approximately 500 m depth in saturated, granitic rock. For the purpose of the safety assessment the engineered portion of the repository system has been divided into a number of consecutive barriers or sub-systems. The importance of a particular feature for safety has influenced the resolution into components. In principle, components close to the source term and those that play an important role for safety are treated in more detail than more peripheral components. For the option with 40 years of reactor operation, the quantity of BWR fuel is estimated at 7200 tonnes and the quantity of PWR fuel at 2300 tonnes. The fuel burn-up may vary from 15 MWd/kgU up to 60 MWd/kg. Geometric aspects of the fuel cladding tubes of importance in the safety assessment are, as a rule, handled sufficiently pessimistically in analyses of radionuclide transport that differences between different fuel types are irrelevant. The relative differences in radionuclide inventory with respect to burn-up are small. Deviations in inventory and deviating or damaged fuel are not considered in the SR-Can interim reporting but will be handled in the final reporting of SR-Can. The canister consists of an inner container, the insert of cast iron and an outer shell of copper. The cast iron insert provides mechanical stability and the copper shell protects against corrosion in the repository environment. The copper shell is 5 cm thick and

  4. Nematode community structure in the vicinity of a metallurgical factory.

    Science.gov (United States)

    Salamún, Peter; Renčo, Marek; Miklisová, Dana; Hanzelová, Vladimíra

    2011-12-01

    Soil nematode communities (taxa composition, trophic structure, ecological indices) in the area of metallurgical factory (Oravské ferozliatinárske závody) in Široká, Northern Slovakia were investigated in 2009. The factory belongs to main sources of emissions originated by ferroalloy production in this region. Four sites (meadows) were selected in a downwind direction from the factory: site A was located 0.85 km far from the factory, and the other sites were maintained in approximately 2-km intervals from each other. Chemical analysis of soil samples showed low concentrations of heavy metals (As, Cd, Cr, Cu, Ni, Pb and Zn), with all values being under Slovak limit concentrations of heavy metals in soils. Only the Cd content in the soil sample from site A slightly exceeded the allowable threshold, but it was decreasing with the distance from the factory, similarly as remaining metals except Cr, with slightly increasing trend of concentration. Within 64 identified nematode genera, the Helicotylenchus, Paratylenchus, Pratylenchus, Acrobeloides, Cephalobus and Rhabditis were most common and eudominant. This was clearly reflected on the trophic structure of nematode communities, where plant feeding nematodes and bacteriovorous prevailed. Significant negative correlation (P < 0.05) was observed between the abundance of bacteriovores and the concentration of Cu in the soil. On the other hand, fungivores showed significant correlation with Ni and Cr (P < 0.05) as well as predators with Cd, Pb and Zn contents in the soil (P < 0.01). The highly significant correlation (P < 0.05; P < 0.01) was found between As, Cd, Ni, Pb and Zn and Maturity Index 2-5. A negative relationship was detected between Maturity Index and the concentration of Cr in the soil (P < 0.01). On the other hand, Cu was in positive correlation with MI values. The MI, reflecting the degree of disturbances and changes in the structure and function of the soil ecosystem, was found

  5. Application of transformational roasting to the treatment of metallurgical wastes

    Science.gov (United States)

    Holloway, Preston Carl

    Transformational roasting involves the heating of a material along with specific additives to induce mineralogical changes in the starting material. By controlling the chemical composition, roasting atmosphere, temperature and time of reaction, the mineral transformations induced during roasting can be engineered to control the distribution of valuable or harmful metals and to produce new mineral assemblages that are more amenable to conventional methods of metals recovery or to environmentally safe disposal. However, to date, transformational roasting processes have only been applied to the recovery of a limited number of metals from a limited number of materials. A generalized procedure for the application of transformational roasting techniques to the treatment of new materials was proposed that utilized a combination of thermodynamic analysis, scoping tests, Design of Experiments (DOE) testing, mineralogical studies, process optimization and analysis of the deportment of minor elements to identify promising roasting systems for further study. This procedure was developed, tested and refined through the application of these techniques to four different industrial metallurgical wastes, including oil sands fly ash from Suncor in northern Alberta, zinc ferrite residue from Doe Run Peru, electric are furnace (EAF) dust from Altasteel's operations in Edmonton, Alberta, and copper-nickel-arsenic sulphide residue from Inco's refinery in Thompson, Manitoba. A large number of potential reagents were identified and tested for the latter three materials and transformational roasting was effectively used to induce mineral transformations during the roasting of these wastes which increased the solubility of valuable elements, decreased the solubility of major impurities, produced a differential solubility between valuable and harmful elements or controlled the volatilization of harmful elements. Comprehensive studies of these mineralogical transformations and the solubility

  6. Anaerobic microbiological method of cleaning water contaminated by metallurgical slags

    Directory of Open Access Journals (Sweden)

    Олена Леонідівна Дан

    2015-11-01

    Full Text Available The problem of environmental protection and rational use of water resources is one of the most important problems of environmental policy in Ukraine. This problem in Mariupol is particularly acute as metallurgical and coke industries cause significant damage to adjacent water bodies (the Kalchyk, the Kalmius and coastal zone of the Sea of Azov. One of the most harmful components of wastewater of these enterprises are sulfide-containing compounds. These compounds in water can cause great harm to both human health and the environment. For example, in 1999 the main city enterprises (AZOVSTAL IRON & STEEL WORKS and ILYICH IRON AND STEEL WORKS discharged 885,0 million m³ of wastewater (including 403,9 million m³ of polluted waste water into water bodies. The slag dumps and landfills in close proximity to the sea form a source of dangerous pollution, because contaminated water infiltration washed out here in the groundwater and surface water, get into the Sea of Azov later on. There are 97 mg/l of sulfides in the protective dam of AZOVSTAL IRON & STEEL WORKS, what exceeds the standards (MPC = 10 mg/l. It makes it possible for us to put forward biochemical purification processes. Anaerobic microbiological method proposed in the article has several advantages (compact hardware design, a minimum amount of activated sludge and lack of energy consumption for aeration over the existing wastewater treatment (chemical, mechanical, biological. The experimental procedure consisted in introducing the medium to be purified purified into microbial communities of high concentration (Thiobacillus «X», Thiobacillus concretivorus, which assimilated organic substances of the medium as a primary energy source. The kinetics of sulfide compounds removal by means of anaerobic microbiological method was considered. The effectiveness of wastewater treatment with changing purification process conditions has been also assessed (concentration of sulfides, reactor type, p

  7. Is the Hypothesis About a Low Entropy Initial State of the Universe Necessary for Explaining the Arrow of Time?

    CERN Document Server

    Goldstein, Sheldon; Zanghi, Nino

    2016-01-01

    According to statistical mechanics, micro-states of an isolated physical system (say, a gas in a box) at time $t_0$ in a given macro-state of less-than-maximal entropy typically evolve in such a way that the entropy at time $t$ increases with $|t-t_0|$ in both time directions. In order to account for the observed entropy increase in only one time direction, the thermodynamic arrow of time, one usually appeals to the hypothesis that the initial state of the universe was one of very low entropy. In certain recent models of cosmology, however, no hypothesis about the initial state of the universe is invoked. We discuss how the emergence of a thermodynamic arrow of time in such models can nevertheless be compatible with the above-mentioned consequence of statistical mechanics, appearances to the contrary notwithstanding.

  8. THE MATHEMATICS STATISTICAL ANALYSIS PRODUCTIVE AND ECONOMIC PARAMETERS METALLURGICAL COMPLEX OF URAL

    Directory of Open Access Journals (Sweden)

    H.N. Gizatullin

    2008-12-01

    Full Text Available For economic rating of efficiency of a metallurgical complex of Ural the algorithm in which basis performance about structure and echelon the device of evaluation object lays is offered. With the help of multivariate methods of the analysis are selected the big system of industrial-financial parameters and its subsystems which final elements determine problems of development of a metallurgical complex. Its decision is possible by the received actual and best models. The found out structures, supervising education and the order of an arrangement of elements in subsystems, subsystems in echelons and echelons in the big system, supporting synergetic relations at all levels, provide economic stability of a complex. It has allowed to reveal not only the typical, but also the specific characteristics of a metallurgical business, both in some regions of Ural, and at possible integration of all the Urals region.

  9. Conceptual design for treatment of mining and metallurgical wastewaters which contains arsenic and antimony

    Directory of Open Access Journals (Sweden)

    Željko Kamberović

    2012-12-01

    Full Text Available This paper presents a preliminary design for treatment of mining and metallurgical wastewaters (MMW from the basin of antimony “Zajača“, which contains high concentrations of arsenic and antimony. MMW have been investigated in laboratory, due to large difference in concentrations of pollutants. Metallurgical wastewaters were treated using iron (II-sulfate and lime milk used to adjust the pH value at 7. After chemical treatment of metallurgical wastewater and its joining with mining wastewater, residual amount of arsenic in water was below maximum allowed concentrations, while the concentration of antimony, remained above the maximum allowed value. The final phase of purification process was performed using ion exchange resin. After treatment of MMW, they can be used as technical water in the smelting process of secondary raw lead materials.

  10. Measuring the metallurgical supply chain resilience using fuzzy analytic network process

    Directory of Open Access Journals (Sweden)

    P. Wicher

    2016-10-01

    Full Text Available The article presents a methodology for measuring the metallurgical supply chain resilience, which enables the ascertainment of key resilience capabilities and measurable criteria, and determining a level of the resilience. The methodology is based on Analytic Network Process (ANP, which is used to solve the complex decision-making problems, whose structures can be mapped as non-linear networks. Since ambiguous pairwise comparisons expressed by fuzzy sets are considered, the Fuzzy Analytic Network Process (FANP is applied. The methodology is verified on the generalised model of a metallurgical supply chain. The SuperDecisions software was used for the application. The experiments performed demonstrate the high level of suitability of the FANP approach for measuring metallurgical supply chain resilience.

  11. Microwave-assisted grinding of metallurgical coke; Molienda asistida con microondas de un coque metalurgico

    Energy Technology Data Exchange (ETDEWEB)

    Ruisanchez, E.; Juarez-Perez, E. J.; Arenillas, A.; Bermudez, J. M.; Menendez, J. A.

    2014-10-01

    Metallurgical cokes are composed of graphitic carbon (s2p2) and different inorganic compounds with very different capacities to absorb microwave radiation. Moreover, due to the electric conductivity shown by the metallurgical cokes, microwave radiation produces electric arcs or microplasmas, which gives rise to hot spots. Therefore, when these cokes are irradiated with microwaves some parts of the particle experiment a rapid heating, while some others do not heat at all. As a result of the different expansion and stress caused by thermal the shock, small cracks and micro-fissures are produced in the particle. The weakening of the coke particles, and therefore an improvement of its grind ability, is produced. This paper studies the microwave-assisted grinding of metallurgical coke and evaluates the grinding improvement and energy saving. (Author)

  12. Methods for Increasing Power Efficiency of Heating Furnaces Applied in Metallurgical and Mechanical Engineering Industries

    Directory of Open Access Journals (Sweden)

    M. L. German

    2011-01-01

    Full Text Available  The paper analyzes experimental data and results of balance tests of two continuous heating furnaces applied in mechanical engineering and metallurgical industries. Furnace power technological characteristics  and dependences of these characteristics on equipment productivity have been determined in the paper. The analysis has made it possible to reveal reasons of higher efficiency of a heating furnace used at BSW Rolling Mill-320 and formulate recommendations on reduction of fuel consumption in operating and designed combustion furnaces applied in mechanical engineering and metallurgical industries.

  13. An assessment of financial audit practices in the Romanian metallurgical industry

    Directory of Open Access Journals (Sweden)

    C. Boţa-Avram

    2014-07-01

    Full Text Available The goal of this paper is to provide an assessment of financial audit practices of the largest metallurgical companies trading on Romanian capital market. Metallurgical industry represents a significant sector in the Romanian economy as a whole; therefore an evaluation of audit practices used by these companies could provide relevant information. Based on a well-documented literature review, with a focus on main findings concerning audit practices, especially in the context of corporate governance, there was selected a set of certain criteria that should be taken into consideration when referring to the best practices in the audit area.

  14. Changes of action strategies in metallurgical enterprises in time of economic crisis

    Directory of Open Access Journals (Sweden)

    Božena Gajdzik

    2013-10-01

    Full Text Available The topic of the article is the change in action strategy of metallurgical enterprises in time of economic slowdown. The first part of article presents results of literature analyses, opinions of scientists concerning changes in behaviours of enterprises in time of bad conjuncture. In next part of the article the author concentrates on verification of argument concerning the changes in action strategies of enterprises in Polish metallurgical sector. Shown examples of changes are confronted with literature studies presented in the first part of the article.

  15. Effects of mechanical activation on the carbothermal reduction of chromite with metallurgical coke

    Directory of Open Access Journals (Sweden)

    Kenan Yıldız

    2010-06-01

    Full Text Available The carbothermal reduction of mechanically activated chromite with metallurgical coke under an argon atmosphere was investigated at temperatures between 1100 and 1400°C and the effects of the mechanical activation on chromite structure were analyzed by x-ray diffraction (XRD and scanning electron microscopy (SEM. An increase in specific surface area resulted in more contact points. The activation procedure led to amorphization and structural disordering in chromite and accelerated the degree of reduction and metalization in the mixture of chromite and metallurgical coke. Carbothermal reduction products were analzed by using scanning electron microscopy (SEM/EDS.

  16. An Overview of Manganese Recovery by Hydro and Pyro-Metallurgical Routes

    Science.gov (United States)

    Dwivedi, Deepak; Randhawa, Navneet Singh; Saroj, Sanjay; Jana, Ranjeet Kumar

    2017-04-01

    This review comprises of information about the recovery of manganese through leaching and carbothermic reduction routes. In industrial processes, various critical parameters such as ore size, temperature, pressure, gas atmosphere and ore composition etc. affect the reduction or recovery of Mn from ores. Authors have tried to bring those critical parameters in this review which is currently being considered as important industrial parameters for Mn ore processing. This paper deals with both pyro-metallurgical and hydro-metallurgical routes for Mn ore reduction and gives brief summary about the critical parameters.

  17. Five Major State-Level Copper,Lead, Zinc Resource Succession Bases in Tibet Have Initially Taken Shape

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    According to the Chengdu Center of China Geological Survey,five major state-level copper-lead-zinc resource succession bases in Tibet have initially taken shape,featuring tremendous resource potentials.It has been learned that these five major resource succession bases are respectively copper-lead-zinc molybdenum iron prospecting development base in Central Tibet,chromite

  18. Structural characteristic of the initial unfolded state on refolding determines catalytic efficiency of the folded protein in presence of osmolytes.

    Directory of Open Access Journals (Sweden)

    Marina Warepam

    Full Text Available Osmolytes are low molecular weight organic molecules accumulated by organisms to assist proper protein folding, and to provide protection to the structural integrity of proteins under denaturing stress conditions. It is known that osmolyte-induced protein folding is brought by unfavorable interaction of osmolytes with the denatured/unfolded states. The interaction of osmolyte with the native state does not significantly contribute to the osmolyte-induced protein folding. We have therefore investigated if different denatured states of a protein (generated by different denaturing agents interact differently with the osmolytes to induce protein folding. We observed that osmolyte-assisted refolding of protein obtained from heat-induced denatured state produces native molecules with higher enzyme activity than those initiated from GdmCl- or urea-induced denatured state indicating that the structural property of the initial denatured state during refolding by osmolytes determines the catalytic efficiency of the folded protein molecule. These conclusions have been reached from the systematic measurements of enzymatic kinetic parameters (Km and kcat, thermodynamic stability (Tm and ΔHm and secondary and tertiary structures of the folded native proteins obtained from refolding of various denatured states (due to heat-, urea- and GdmCl-induced denaturation of RNase-A in the presence of various osmolytes.

  19. The Number and Geographical Scope of the EU Foreign Policy Initiatives of Small Member States: Does „smallness“ matter?

    Directory of Open Access Journals (Sweden)

    Luša Đana

    2015-02-01

    Full Text Available Due to the complex voting and decision-making mechanisms of the EU, the size-factor has long been present within EU studies as a relevant and significant variable in explaining member states’ activism. Despite the aim of small states to achieve equal representation, there is a huge discrepancy between the power of big and small states within the EU. Therefore, the expected behavior of small states is different from that of the big ones. However, there are also significant differences in foreign policy activism within the group of small EU states and those are analysed in this article. In order to differentiate small states’ activism within EU foreign policy, the article explores the correlation between the scope and number of small states’ leadership initiatives in EU foreign policy and different quantitative criteria used to define these small states (population, total GDP, GDP per capita

  20. Evaluation of the State Energy Conservation Program from program initiation to September 1978. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Heller, James N.; Grossmann, John R.; Shochet, Susan; Bresler, Joel; Duggan, Noreene

    1980-03-01

    The State Energy Conservation Program was established in 1975 to promote energy conservation and to help states develop and implement their own conservation programs. Base (5) and supplemental (3) programs required states to implement programs including: mandatory thermal-efficiency standards and insulation requirements for new and renovated buildings; mandatory lighting efficiency standards for public buildings; mandatory standards and policies affecting the procurement practices of the state and its political subdivisions; program measures to promote the availability and use of carpools, vanpools, and public transportation; a traffic law or regulation which permits a right turn-on-red; and procedures to carry out a continuing public education effort to increase awareness of energy conservation; procedures which promote effective coordination among local, state, and Federal energy conservation programs; and procedures for carrying out energy audits on buildings and industrial plants. All 50 states and Puerto Rico, Guam, the Virgin Islands, American Samoa, and the District of Columbia participated in the program. The total 1980 energy savings projected by the states is about 5.9 quadrillion Btu's or about 7% of the DOE projected 1980 baseline consumption of just under 83 quads. The detailed summary is presented on the following: information the SECP evaluation; DOE response to the SECP; DOE's role in the program management process; the effectiveness of the states in managing the SECP; the status of program measure implementation; innovative state energy conservation programs; and the evaluation methodology.

  1. Collaborative Technology Initiatives for Serving Persons with Disabilities in New York State. Occasional Paper #1.

    Science.gov (United States)

    Stoll, Peter F.

    This paper describes the programs undertaken by the New York State Center for Learning Technologies in cooperation both with other state agencies and with private agencies to ensure that learning technologies are integrated into educational training programs for the disabled, the handicapped, and other special needs populations. Programs described…

  2. Hot-deformation behaviors of AZ31 alloys with different initial states

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The hot-deformation behaviors of three types of AZ31 samples, extruded sheet, hot rolled sheet and east rod were studied.These samples had different initial grain size and texture. Compression deformation of these samples was carried out using a Gleeble 1500D under a series of thermal deformation conditions. Mierostructure and texture of the initial and deformed samples were examined using electron backscatter diffraction (EBSD) techniques. The flow curves for all these three types of samples shifted upward with strain rate increasing. Significant grain refinement was noticed in the hot rolled sheet sample. The grain size was reduced to 3.7 μm after 50% (ε=0.69) compression. The DRX grains in both the extruded rod and hot rolled sheet samples presented the same basal plane texture, irrespective of the difference in the initial texture of the samples.

  3. The phosphorylation state of eucaryotic initiation factor 2 alters translational efficiency of specific mRNAs.

    OpenAIRE

    Kaufman, R J; Davies, M V; Pathak, V K; Hershey, J W

    1989-01-01

    Phosphorylation of the alpha subunit of the eucaryotic translation initiation factor (eIF-2 alpha) by the double-stranded RNA-activated inhibitor (DAI) kinase correlates with inhibition of translation initiation. The importance of eIF-2 alpha phosphorylation in regulating translation was studied by expression of specific mutants of eIF-2 alpha in COS-1 cells. DNA transfection of certain plasmids could activate DAI kinase and result in poor translation of plasmid-derived mRNAs. In these cases,...

  4. Gender difference in early initiation of methamphetamine use among current methamphetamine users in Muse, Northern Shan State, Myanmar.

    Science.gov (United States)

    Saw, Yu Mon; Saw, Thu Nandar; Yasuoka, Junko; Chan, Nyein; Kham, Nang Pann Ei; Khine, Wint; Cho, Su Myat; Jimba, Masamine

    2017-05-08

    Globally, methamphetamine (MA) use is a significant public health concern due to unprecedented health effects of its use. However, gender similarities and differences in early age of MA initiation and its risk factors among current MA users have been understudied in a developing country setting. A community-based, cross-sectional study was conducted using a computer assisted self-interviewing program from January to March 2013 in Muse, Northern Shan State, Myanmar. A total of 1362 (775 male and 587 female) self-reported current MA users aged between 18 and 35 years were recruited using respondent-driven sampling. Two gender-stratified multiple logistic regression models (models I and II) were done for analysis. For similarities, 73.0% of males and 60.5% of females initiated MA before their 18th birthday. The early age of MA initiation was positively associated with the reasons and places of the first time MA use among both genders. For differences, males [hazard ratio 1.35; 95% confidence interval, 1.18-1.54] had a significantly higher risk than females to initiate MA at earlier age. Among male users, participants who had bisexual/homosexual preferences were more likely to initiate MA use earlier. In contrast, female users who exchanged sex for money and/or drugs were more likely to initiate MA in earlier age. More than 60.0% of male and female participants initiated MA use early; however, males initiated use earlier than females. Although similarities were found among both genders, differences found in key risk factors for early age MA initiation suggest that gender-specific, MA prevention programs are urgently needed in Myanmar.

  5. Calculation of correlated initial state in the hierarchical equations of motion method using an imaginary time path integral approach.

    Science.gov (United States)

    Song, Linze; Shi, Qiang

    2015-11-21

    Based on recent findings in the hierarchical equations of motion (HEOM) for correlated initial state [Y. Tanimura, J. Chem. Phys. 141, 044114 (2014)], we propose a new stochastic method to obtain the initial conditions for the real time HEOM propagation, which can be used further to calculate the equilibrium correlation functions and symmetrized correlation functions. The new method is derived through stochastic unraveling of the imaginary time influence functional, where a set of stochastic imaginary time HEOM are obtained. The validity of the new method is demonstrated using numerical examples including the spin-Boson model, and the Holstein model with undamped harmonic oscillator modes.

  6. [Using the evaluation of carcinogenic risk in the mining and metallurgical enterprises of the Arctic].

    Science.gov (United States)

    Serebriakov, P V

    2012-01-01

    The aim of this study--hygienic assessment of the contribution of factors of working environment) in the formation of carcinogenic risk to the mining and metallurgical enterprises of the Far North, the establishment of the structural features of cancer pathology among workers of these enterprises, quantitative evaluation of individual professional cancer risk in different nosological forms and morphological variants of malignant neoplasms.

  7. Comparison of metallurgical coke and lignite coke for power generation in Thailand

    Science.gov (United States)

    Ratanakuakangwan, Sudlop; Tangjitsitcharoen, Somkiat

    2017-04-01

    This paper presents and compares two alternatives of cokes in power generation which are the metallurgical coke with coke oven gas and the coke from lignite under the consideration of the energy and the environment. These alternatives not only consume less fuel due to their higher heat content than conventional coal but also has less SO2 emission. The metallurgical coke and its by-product which is coke oven gas can be obtained from the carbonization process of coking coal. According to high grade coking coal, the result in the energy attitude is not profitable but its sulfur content that directly affects the emission of SO2 is considered to be very low. On the other hand, the coke produced from lignite is known as it is the lowest grade from coal and it causes the high pollution. Regarding to energy profitability, the lignite coke is considered to be much more beneficial than the metallurgical coke in contrast to the environmental concerns. However, the metallurgical coke has the highest heating value. Therefore, a decision making between those choices must be referred to the surrounding circumstances based on energy and environment as well as economic consideration in the further research.

  8. Advanced numerical models for the thermo-mechanical-metallurgical analysis in hot forging processes

    Science.gov (United States)

    Ducato, Antonino; Fratini, Livan; Micari, Fabrizio

    2013-05-01

    In the paper a literature review of the numerical modeling of thermo-mechanical-metallurgical evolutions of a metal in hot forging operations is presented. In particular models of multiaxial loading tests are considered for carbon steels. The collected examples from literature regard phases transformations, also martensitic transformations, morphologies evolutions and transformation plasticity phenomena. The purpose of the tests is to show the correlation between the mechanical and the metallurgical behavior of a carbon steel during a combination of several types of loads. In particular a few mechanical tests with heat treatment are analyzed. Furthermore, Ti-6Al-4V titanium alloy is considered. Such material is a multi-phasic alloy, at room temperature made of two main different phases, namely Alpha and Beta, which evolve during both cooling and heating stages. Several numerical applications, conducted using a commercial implicit lagrangian FEM code are presented too. This code can conduct tri-coupled thermo-mechanical-metallurgical simulations of forming processes. The numerical model has been used to carry out a 3D simulation of a forging process of a complex shape part. The model is able to take into account the effects of all the phenomena resulting from the coupling of thermal, mechanical and metallurgical events. As simulation results strongly depend on the accuracy of input data, physical simulation experiments on real-material samples are carried out to characterize material behavior during phase transformation.

  9. Initial Motivations for Teaching: Comparison between Preservice Teachers in the United States and China

    Science.gov (United States)

    Lin, Emily; Shi, Qingmin; Wang, Jian; Zhang, Shaoan; Hui, Liu

    2012-01-01

    This study examined similar and differing initial motivations to teach between 257 US and 542 Chinese preservice teachers using the recently validated FIT-Choice scale. In both countries, participants were motivated to enter teaching because of their social utility values. US preservice teachers reported significantly higher motivations from…

  10. A formula to compute the microcanonical volume of reactive initial conditions in transition state theory

    NARCIS (Netherlands)

    Waalkens, H.; Burbanks, A.; Wiggins, S.

    2005-01-01

    We present the formal proof of a procedure to compute the phase-space volume of initial conditions for trajectories that, for a constant energy, escape or ‘react’ from a multi-dimensional potential well with one or several exit/entrance channels. The procedure relies on a phase-space formulation of

  11. A formula to compute the microcanonical volume of reactive initial conditions in transition state theory

    NARCIS (Netherlands)

    Waalkens, H.; Burbanks, A.; Wiggins, S.

    2005-01-01

    We present the formal proof of a procedure to compute the phase-space volume of initial conditions for trajectories that, for a constant energy, escape or ‘react’ from a multi-dimensional potential well with one or several exit/entrance channels. The procedure relies on a phase-space formulation of

  12. 9 CFR 56.10 - Initial State response and containment plan.

    Science.gov (United States)

    2010-01-01

    ... the relevant State. This plan must include: (1) Provisions for a standing emergency disease management... affected; (2) A minimum biosecurity plan followed by all poultry producers; (3) Provisions for...

  13. Status of science education in state departments of education: An initial report

    Science.gov (United States)

    Dowling, Kenneth W.; Yager, Robert E.

    The past five years have been characterized as times of assessment in science education. One aspect of the profession where little information has been reported is the service and leadership provided by the various Departments of Education that exist as a part of the 50 state governments. Information was collected from the 50 states concerning the professional preparation of state science consultants, the nature of the positions, number of workers employed in such units, changes in support staff, facilities, and budget for each five year interval between 1960-1980. Science consultants are 46 years of age, have completed more than 10 years of classroom teaching, have been supervisors at the last level, have been in state positions for one-eight years, and have a Master's degree (half have the Ph.D.). Science consultants in the state department of education work in local schools, write proposals, assist with other administrative duties, work as members of evaluation teams. They spend two-thirds of their time in science education per se. The duties have become more general with less time spent exclusively on science education duties. The positions have become more involved with regulations, evaluations; the consultants enjoying less flexibility in their jobs. There has been a decline in terms of numbers of consultants, budget for science education; and general support for science education projects in state departments of education during the 20-year period surveyed.

  14. H+CH4 → H2 + CH3 initial state-selected reaction probabilities on different potential energy surfaces

    Science.gov (United States)

    Ellerbrock, Roman; Manthe, Uwe

    2017-01-01

    Initial state-selected reaction probabilities for the H +CH4 →H2 +CH3 reaction on a recently developed potential energy surface which employs neutral network fitting based on permutational invariant polynomials are reported. The quantum dynamics calculations use the quantum transition state concept and the multi-layer multi-configurational time-dependent Hartree approach and study the reaction process in full-dimensionality for vanishing total angular momentum. A detailed comparison with previous results obtained on other high-level potential energy surfaces is given. The connection between the level of quantum state resolution and the sensitivity of the results on differences in the potential energy surfaces is highlighted. Employing a decomposition of the total reactivity into contributions of the different vibrational states of the activated complex, it is found that differences between the potential energy surfaces are mainly related to the umbrella motion of the methyl group.

  15. Initial-state fluctuations and factorization breaking in pPb and PbPb collisions at LHC energies

    CERN Document Server

    Milosevic, Jovan

    2014-01-01

    The single-particle anisotropy coefficients measured in PbPb collisions at $\\sqrt{s_{NN}}$=2.76~TeV and high-multiplicity pPb collisions at $\\sqrt{s_{NN}}$=5.02~TeV by the CMS collaboration are presented. These coefficients are obtained from two-particle $\\Delta\\phi$-$\\Delta\\eta$ correlations. The observed correlations in ultra-central PbPb events are expected to be particularly sensitive to initial-state fluctuations. The breakdown of factorization of two-particle correlations into single-particle azimuthal anisotropies is observed in both colliding systems. This effect, recently predicted by hydrodynamics, is induced due to initial-state fluctuations which could produce a transverse momentum dependence of event-plane angle even if hydrodynamic flow is the only source of correlations.

  16. Impact parameter moments for ionization of Ne, Ar, Kr, and Xe by protons, considering different initial states and impact energies

    CERN Document Server

    Miraglia, J E

    2016-01-01

    Tables of ab-initio total cross sections, probabilities at zero impact parameter, and impact parameter moments are presented concerning the ionization of Ne, Ar, Kr, and Xe by proton impact in the energy range (0.1-10) MeV. Calculations correspond to the continuum distorted wave eikonal initial state approximation (CDW-EIS) for energies up to 1MeV, and to the first Born approximation for larger energies. Results displayed in the tables are disaggregated for the different initial bound states, considering all shells for Ne and Ar, L-M-N shells of Kr and M-N-O shells of Xe. Our inner-shell ionization cross sections are compared with the available experimental data and with the ECPSSR results.

  17. The relaxation of initial condition in systems with infinitely many absorbing states

    CERN Document Server

    Ódor, G; Dos Santos, M A; Marques, M C; Odor, Geza

    1998-01-01

    We have investigated the effect of the initial condition on the spreading exponents of the one-dimensional pair contact process (PCP) and threshold transfer process (TTP).The non-order field was found to exhibit critical fluctuations, relaxing to its natural value with the same power-law as the order parameter field. We argue that this slow relaxation, which was not taken into account in earlier studies of these models, is responsible for the continuously changing survival probability exponent. High precision numerical simulations show evidence of a(slight) dependence of the location of the transition point on the initial concentration, in the case of PCP. The damage spreading (DS) point and the spreading exponents coincide with those of the ordinary critical point in both cases.

  18. Initial State Specification for Mesoscale Applications (gtSpecial IssueltData Assimilation in Meteology and Oceanography: Theory and Practice)

    OpenAIRE

    K., Puri; G.A., Mills; Bureau of Meteorology Research Centre

    1997-01-01

    Mesoscale data assimilation systems are being run at a number of operational and research centres as the demand for accurate mesoscale forecasts increases. In this paper, a review of some major issues and common practices in mesoscale data assimilation are considered with an emphasis on operational applications. Attention is focussed on the generation of an adequate initial state using a variety of conventional and non-conventional data sources and techniques.

  19. THE JUDGE'S PROBATIVE INITIATIVE: CONTRASTS AND LIMITATIONS FROM THE LEGAL-CONSTITUTIONAL PARADIGM OF LAWFUL DEMOCRATIC STATE

    Directory of Open Access Journals (Sweden)

    Igor Alves Noberto Soares

    2016-12-01

    Full Text Available This article will reflect on the production of proof by the judge, in the context of Criminal Procedure, according to the rules presents in the brazilian legal system. Therefore, the critcial incursions will take into account the technical constructions expressed from the legal and constitutional paradigm of Lawful Democratic State, in order to counter the currently permissive system that confers, to judging agent, the probative initiative.

  20. Fifty hertz magnetic fields individually affect chromatin conformation in human lymphocytes: dependence on amplitude, temperature, and initial chromatin state.

    Science.gov (United States)

    Sarimov, Ruslan; Alipov, Eugene D; Belyaev, Igor Y

    2011-10-01

    Effects of magnetic field (MF) at 50 Hz on chromatin conformation were studied by the method of anomalous viscosity time dependence (AVTD) in human lymphocytes from two healthy donors. MF within the peak amplitude range of 5-20 µT affected chromatin conformation. These MF effects differed significantly between studied donors, and depended on magnetic flux density and initial condensation of chromatin. While the initial state of chromatin was rather stable in one donor during one calendar year of measurements, the initial condensation varied significantly in cells from another donor. Both this variation and the MF effect depended on temperature during exposure. Despite these variations, the general rule was that MF condensed the relaxed chromatin and relaxed the condensed chromatin. Thus, in this study we show that individual effects of 50 Hz MF exposure at peak amplitudes within the range of 5-20 µT may be observed in human lymphocytes in dependence on the initial state of chromatin and temperature. Copyright © 2011 Wiley-Liss, Inc.

  1. The influence of normal fault on initial state of stress in rock mass

    Directory of Open Access Journals (Sweden)

    Tajduś Antoni

    2016-03-01

    Full Text Available Determination of original state of stress in rock mass is a very difficult task for rock mechanics. Yet, original state of stress in rock mass has fundamental influence on secondary state of stress, which occurs in the vicinity of mining headings. This, in turn, is the cause of the occurrence of a number of mining hazards, i.e., seismic events, rock bursts, gas and rock outbursts, falls of roof. From experience, it is known that original state of stress depends a lot on tectonic disturbances, i.e., faults and folds. In the area of faults, a great number of seismic events occur, often of high energies. These seismic events, in many cases, are the cause of rock bursts and damage to the constructions located inside the rock mass and on the surface of the ground. To estimate the influence of fault existence on the disturbance of original state of stress in rock mass, numerical calculations were done by means of Finite Element Method. In the calculations, it was tried to determine the influence of different factors on state of stress, which occurs in the vicinity of a normal fault, i.e., the influence of normal fault inclination, deformability of rock mass, values of friction coefficient on the fault contact. Critical value of friction coefficient was also determined, when mutual dislocation of rock mass part separated by a fault is impossible. The obtained results enabled formulation of a number of conclusions, which are important in the context of seismic events and rock bursts in the area of faults.

  2. Strategic Financing: Making the Most of the State Early Childhood Comprehensive Systems Initiative

    Science.gov (United States)

    Hayes, Cheryl D.; Flynn, Margaret J.; Stebbins, Helene

    2004-01-01

    As states build comprehensive early childhood systems, policy leaders will need to be attentive to the funding streams available to communities to achieve desired returns. Most public funding for early care and education, as well as for other health and social services for young children and their families is categorical. Categorical funding…

  3. 75 FR 47223 - Louisiana: Final Authorization of State-Initiated Changes and Incorporation by Reference of...

    Science.gov (United States)

    2010-08-05

    ... owners and operators of hazardous waste treatment, storage, and disposal facilities) 303.H.4 264.11. 1501... operators of hazardous waste treatment, storage, and disposal facilities) 4301.C except C.13.c and C.13.e... Incorporation by Reference of Approved State Hazardous Waste Management Program AGENCY: Environmental Protection...

  4. Sustainability for the Americas Initiative: Land Design Institute, Ball State University

    Science.gov (United States)

    J. L. Motloch; Pedro Pacheco; Eloy F. Jr. Casagrande

    2006-01-01

    The Ball State University Land Design Institute (LDI) pursues ecologically and culturally sustainable land design through education, research, outreach, and demonstration. LDI seeks to lead communities (local, regional, global) to sustainable futures. It connects communities and sustainability experts to optimize education about land management, planning, and design...

  5. Initial Adjustment of Taiwanese Students to the United States: The Impact of Postarrival Variables.

    Science.gov (United States)

    Ying, Yu-Wen; Liese, Lawrence H.

    1994-01-01

    Examines the adjustment of 172 Taiwanese students during their first months in the United States. A multidimensional model is used that accounts for 39% of the variance of adjustment. Mediating factors of the model include demographics, personality, number and severity of problems experienced, prearrival preparation, social support, language…

  6. Resting state functional connectivity changes in adults with developmental stuttering: an initial sLORETA study.

    Directory of Open Access Journals (Sweden)

    Kathleen eJoos

    2014-10-01

    Full Text Available Introduction: Stuttering is defined as speech characterized by verbal dysfluencies, but should not be seen as an isolated speech disorder, but as a generalized sensorimotor timing deficit due to impaired communication between speech related brain areas. Therefore we focused on resting state brain activity and functional connectivity.Method: We included 11 patients with developmental stuttering and 11 age matched controls. To objectify stuttering severity and the impact on the quality of life (QoL, we used the Dutch validated Test for Stuttering Severity-Readers (TSS-R and the Overall Assessment of the Speaker’s Experience of Stuttering (OASES, respectively. Furthermore, we used standardized low resolution brain electromagnetic tomography (sLORETA analyses to look at resting state activity and functional connectivity differences and their correlations with the TSS-R and OASES.Results: No resting state activity differences were identified in comparison to fluently speaking controls or in correlation with stuttering severity or QoL measures. Significant alterations in resting state functional connectivity were found, predominantly interhemispheric, i.e. a decreased functional connectivity for high frequency oscillations (beta and gamma between motor speech areas (BA44 and 45 and the contralateral premotor (BA 6 and motor (BA 4 areas. A positive correlation was found between functional connectivity at low frequency oscillations (theta and alpha and stuttering severity, while a mixed increased and decreased functional connectivity at low and high frequency oscillations correlated with QoL.Discussion: PWS are characterized by decreased high frequency interhemispheric functional connectivity between motor speech, premotor and motor areas in the resting state, while higher functional connectivity in the low frequency bands indicates more severe speech disturbances, suggesting that increased interhemispheric and right sided functional connectivity is

  7. United States Air Force Research Initiation Program. 1984 Research Reports. Volume 3.

    Science.gov (United States)

    1986-05-01

    S. "Behavioral decision theory", A Review 2f Psycolog , Vol. 28, pp. 1-39, 1977. [21 Price, H.E., Maisana, R.E., and Van Cott, H.P. "The allocation... Capitalization on chance. That is, model modifications are based on results obtained from fl.ttrg an initial model to a particular sample. Therefore, the search...probably due to a combination of (a) a relatively low level of power for the models and samples employed, and (bi the pieomenon of capitalization on

  8. Estimating the state of a geophysical system with sparse observations: time delay methods to achieve accurate initial states for prediction

    Science.gov (United States)

    An, Zhe; Rey, Daniel; Ye, Jingxin; Abarbanel, Henry D. I.

    2017-01-01

    The problem of forecasting the behavior of a complex dynamical system through analysis of observational time-series data becomes difficult when the system expresses chaotic behavior and the measurements are sparse, in both space and/or time. Despite the fact that this situation is quite typical across many fields, including numerical weather prediction, the issue of whether the available observations are "sufficient" for generating successful forecasts is still not well understood. An analysis by Whartenby et al. (2013) found that in the context of the nonlinear shallow water equations on a β plane, standard nudging techniques require observing approximately 70 % of the full set of state variables. Here we examine the same system using a method introduced by Rey et al. (2014a), which generalizes standard nudging methods to utilize time delayed measurements. We show that in certain circumstances, it provides a sizable reduction in the number of observations required to construct accurate estimates and high-quality predictions. In particular, we find that this estimate of 70 % can be reduced to about 33 % using time delays, and even further if Lagrangian drifter locations are also used as measurements.

  9. Digitalizing the Circular Economy - Circular Economy Engineering Defined by the Metallurgical Internet of Things

    Science.gov (United States)

    Reuter, Markus A.

    2016-09-01

    Metallurgy is a key enabler of a circular economy (CE), its digitalization is the metallurgical Internet of Things (m-IoT). In short: Metallurgy is at the heart of a CE, as metals all have strong intrinsic recycling potentials. Process metallurgy, as a key enabler for a CE, will help much to deliver its goals. The first-principles models of process engineering help quantify the resource efficiency (RE) of the CE system, connecting all stakeholders via digitalization. This provides well-argued and first-principles environmental information to empower a tax paying consumer society, policy, legislators, and environmentalists. It provides the details of capital expenditure and operational expenditure estimates. Through this path, the opportunities and limits of a CE, recycling, and its technology can be estimated. The true boundaries of sustainability can be determined in addition to the techno-economic evaluation of RE. The integration of metallurgical reactor technology and systems digitally, not only on one site but linking different sites globally via hardware, is the basis for describing CE systems as dynamic feedback control loops, i.e., the m-IoT. It is the linkage of the global carrier metallurgical processing system infrastructure that maximizes the recovery of all minor and technology elements in its associated refining metallurgical infrastructure. This will be illustrated through the following: (1) System optimization models for multimetal metallurgical processing. These map large-scale m-IoT systems linked to computer-aided design tools of the original equipment manufacturers and then establish a recycling index through the quantification of RE. (2) Reactor optimization and industrial system solutions to realize the "CE (within a) Corporation—CEC," realizing the CE of society. (3) Real-time measurement of ore and scrap properties in intelligent plant structures, linked to the modeling, simulation, and optimization of industrial extractive process

  10. Evaluating Kinship Care Alternatives: A Comparison of a Private Initiative to Traditional State Services

    Directory of Open Access Journals (Sweden)

    Rodney A. Ellis

    2002-05-01

    Full Text Available Multiple stressors on the child welfare system have forced innovative solutions to the overburdened foster care program. A promising alternative is kinship care, in which children are placed with biological relatives. Proponents cite the opportunity to place the child in familiar surroundings, the natural access to additional family resources, and the degree to which it is sensitive to the norms and values of non-dominant cultural groups. Various models of kinship care have been implemented in several jurisdictions, yet little or no research has been done to determine which alternatives are the most effective. This paper addresses that deficit. It reports the results of a study that compares stability of placement outcomes between a program operated by a private,not-for-profit organization (n=60 and a more traditional program (n=79 operated by a state child welfare agency. Results support the use of the private alternative over the more traditional state-operated program.

  11. United States Air Force Research Initiation Program. 1985 Technical Report. Volume 2.

    Science.gov (United States)

    1987-04-01

    of spectra of intact feline corneal collagen 4). Our laboratory has been involved in a study of age related changes in corneal glycosaminoglycans...Spectra of Intact * Feline Corneal Collagen". Biochem. Bioh Acta, Vol. 536. pp. 197-204, L: p1978. 5. Gaber, B. P., "Biological Applications of Laser...negative results. These findings are similar to those reported by Braun (1982) for natural sodies of water in New York state. Apparently similar ecological

  12. United States Air Force Research Initiation Program for 1988. Volume 1

    Science.gov (United States)

    1990-04-01

    D. R., and Golovin , M. N., "Enhanced Energy Coupling Phenomena: A State-of-the-Art Survey and Assessment," Air Force Armament Laboratory, Eglin AFB...PPM) (PPM) (PPM) 1-6 9380 8755 625 625 100% 2-1 3000 200 2800 5700 49% 2-6 3090 270 2820 7350 38% 2-11 1940 370 1570 6940 23% 1-10 2830 1250 1580 6020

  13. Estimating Renewable Energy Economic Potential in the United States: Methodology and Initial Results

    Energy Technology Data Exchange (ETDEWEB)

    Brown, Austin [National Renewable Energy Lab. (NREL), Golden, CO (United States); Beiter, Philipp [National Renewable Energy Lab. (NREL), Golden, CO (United States); Heimiller, Donna [National Renewable Energy Lab. (NREL), Golden, CO (United States); Davidson, Carolyn [National Renewable Energy Lab. (NREL), Golden, CO (United States); Denholm, Paul [National Renewable Energy Lab. (NREL), Golden, CO (United States); Melius, Jennifer [National Renewable Energy Lab. (NREL), Golden, CO (United States); Lopez, Anthony [National Renewable Energy Lab. (NREL), Golden, CO (United States); Hettinger, Dylan [National Renewable Energy Lab. (NREL), Golden, CO (United States); Mulcahy, David [National Renewable Energy Lab. (NREL), Golden, CO (United States); Porro, Gian [National Renewable Energy Lab. (NREL), Golden, CO (United States)

    2016-08-01

    The report describes a geospatial analysis method to estimate the economic potential of several renewable resources available for electricity generation in the United States. Economic potential, one measure of renewable generation potential, is defined in this report as the subset of the available resource technical potential where the cost required to generate the electricity (which determines the minimum revenue requirements for development of the resource) is below the revenue available in terms of displaced energy and displaced capacity.

  14. IFM – SCIENTIFIC CENTRE OF THE DEVELOPMENT OF THE UKRAINIAN METALLURGICAL INDUSTRY

    Directory of Open Access Journals (Sweden)

    BOLSHAKOV V. I.

    2017-01-01

    Full Text Available The history of creation and development of the Institute of ferrous metallurgy of the Ukrainian Academy of Sciences named after Z. I. Nekrasov is regarded in the article. IFM has become the scientific centre of the development of the metallurgical industry of Ukraine. Researches of the outstanding scientists show their significant contribution in the development of the metallurgical science and implementation of their achievements in the production of the metallurgical industry of Ukraine. Analysis of publications. History of the Institute of the ferrous metallurgy is regarded in the fundamental works devoted to the development of the metallurgical industry in Ukraine and in the works published to the jubilee dates of the prominent scientists academicians Z. I. Nekrasov, V. I. Bol’shakov and others. The purpose of the article is to analyze the process of the creation of the Institute and the stages of its development in the 20th and 21st centuries and to define the influence of the economic and political situation in the country upon this process? To regard the role of the outstanding scientists and influence of their achievements on the development of the metallurgical industry of Ukraine. The history of IFM began in 1939 when it was organized in Kharkiv as a part of the Academy of Sciences of Ukraine. At the beginning of the Great Patriotic war the Institute was moved to Ufa – the capital of Bashkiria. During the war the scientists of the Institute tried to increase the output of metal and special steels for the defence industry. In 1943 the Institute moved to Moscow and then to Kiev. In 1952 it was decided to move the Institute to Dnepropetrovsk. In order to combine the scientific researches and production of metal. Z. I. Nekrasov was elected Director of the Institute. The departments of the Indtitute were headed by academicians Z. I. Nekrasov, A. P. Chekmariov, K. F. Starodubov, Correspondence Members of the Ukrainian Academy of Sciences

  15. State of Simulation in Healthcare Education: An Initial Survey in Beijing.

    Science.gov (United States)

    Zhao, Zichen; Niu, Pengfei; Ji, Xiang; Sweet, Robert M

    2017-01-01

    In 2013, medical error was the third leading cause of death in the United States.(1) In China, as in the case with the United States, training and assessment are developing as a strategy to reduce the occurrence of such errors. The objective of this study was to assess the current state of the use of simulation-based training in Beijing and to explore the barriers to further development. This study included hospitals in Beijing accredited by the Standardized Residency Training (SRT) program. The questionnaire was designed online and distributed to the SRT management departments by e-mail or instant message. Thirty hospitals were invited to participate in this survey, and 15 responses were completed and met the inclusion criteria. Task trainers (15/15), full-scale mannequins (14/15), standardized patients (12/15), and virtual reality workstations (11/15) were the most common types of simulation modalities available for use. Among the given specialties for SRT, the availability of simulation courses was 2/2 for pediatric internal medicine, 1/1 for pediatric surgery, 10/11 for surgery, 11/14 for internal medicine, 7/9 for anesthesiology, 6/8 for emergency medicine, and 3/9 for obstetrics/gynecology. Of the 13 institutions with available simulation curricula, 12/13 had simulation focused on proficiency-based skill training, 11/13 had medical knowledge learning, 10/13 had skill competency assessment. The main targeted trainees in these hospitals were residents (or postgraduate residents) and medical students (or interns). The top 2 barriers were the shortage of sustainable financial resources (12/15) and advocacy from their institutional authorities (7/15). It is evident that there is a need for more development of training facilities, and for training the "trainers" and administrators. Financial funding, curricular design, and research seem to be crucial for building a long-term, sustainable, effective program.

  16. State and local fiscal impacts associated with nuclear energy centers: some initial considerations

    Energy Technology Data Exchange (ETDEWEB)

    Bjornstad, D.J.

    1976-04-01

    The concept of the nuclear energy center is designed to consolidate a number of electrical power reactors and/or related fuel cycle activities on a single site. Such a siting strategy would concentrate a great deal of economic activity in one area and, as a consequence, generate significant impacts on state and local governments by increasing tax bases and public service demands and by altering intergovernmental fiscal relations. This study was designed to place rough empirical measures on relevant impact variables and to highlight areas for which a need for further research was indicated.

  17. A three axis turntable's online initial state measurement method based on the high-accuracy laser gyro SINS

    Science.gov (United States)

    Gao, Chunfeng; Wei, Guo; Wang, Qi; Xiong, Zhenyu; Wang, Qun; Long, Xingwu

    2016-10-01

    As an indispensable equipment in inertial technology tests, the three-axis turntable is widely used in the calibration of various types inertial navigation systems (INS). In order to ensure the calibration accuracy of INS, we need to accurately measure the initial state of the turntable. However, the traditional measuring method needs a lot of exterior equipment (such as level instrument, north seeker, autocollimator, etc.), and the test processing is complex, low efficiency. Therefore, it is relatively difficult for the inertial measurement equipment manufacturers to realize the self-inspection of the turntable. Owing to the high precision attitude information provided by the laser gyro strapdown inertial navigation system (SINS) after fine alignment, we can use it as the attitude reference of initial state measurement of three-axis turntable. For the principle that the fixed rotation vector increment is not affected by measuring point, we use the laser gyro INS and the encoder of the turntable to provide the attitudes of turntable mounting plat. Through this way, the high accuracy measurement of perpendicularity error and initial attitude of the three-axis turntable has been achieved.

  18. Constraining models of initial state with v{sub 2} and v{sub 3} data from LHC and RHIC

    Energy Technology Data Exchange (ETDEWEB)

    Retinskaya, Ekaterina, E-mail: ekaterina.retinskaya@cea.fr [CEA, IPhT, Institut de physique théorique de Saclay, F-91191 Gif-sur-Yvette (France); Luzum, Matthew, E-mail: MWLuzum@lbl.gov [McGill University, 3600 University Street, Montreal QC H3A 2TS (Canada); Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States); Ollitrault, Jean-Yves, E-mail: jean-yves.ollitrault@cea.fr [CNRS, URA2306, IPhT, Institut de physique théorique de Saclay, F-91191 Gif-sur-Yvette (France)

    2014-06-15

    We present a combined analysis of elliptic and triangular flow data from LHC and RHIC using viscous relativistic hydrodynamics. Elliptic flow v{sub 2} in hydrodynamics is proportional to the participant eccentricity ε{sub 2} and triangular flow is proportional to the participant triangularity ε{sub 3}, which means v{sub n}=κ{sub n}ε{sub n}, where κ{sub n} is the linear response coefficient in harmonic n. Experimental data for v{sub 2} and v{sub 3} combined with hydrodynamic calculations of κ{sub n} thus provide us with the rms values of initial anisotropies ε{sub 2} and ε{sub 3}. By varying free parameters in the hydro calculation (in particular the shear viscosity), we obtain an allowed band in the (rms ε{sub 2}, rms ε{sub 3}) plane. Comparison with Monte Carlo models of the initial state allows us to exclude several of these models. We illustrate that the effect of changing the granularity of the initial state is similar to changing the medium properties, making these effects difficult to disentangle.

  19. Control quantum evolution speed of a single dephasing qubit for arbitrary initial states via periodic dynamical decoupling pulses

    Science.gov (United States)

    Song, Ya-Ju; Tan, Qing-Shou; Kuang, Le-Man

    2017-01-01

    We investigate the possibility to control quantum evolution speed of a single dephasing qubit for arbitrary initial states by the use of periodic dynamical decoupling (PDD) pulses. It is indicated that the quantum speed limit time (QSLT) is determined by initial and final quantum coherence of the qubit, as well as the non-Markovianity of the system under consideration during the evolution when the qubit is subjected to a zero-temperature Ohmic-like dephasing reservoir. It is shown that final quantum coherence of the qubit and the non-Markovianity of the system can be modulated by PDD pulses. Our results show that for arbitrary initial states of the dephasing qubit with non-vanishing quantum coherence, PDD pulses can be used to induce potential acceleration of the quantum evolution in the short-time regime, while PDD pulses can lead to potential speedup and slow down in the long-time regime. We demonstrate that the effect of PDD on the QSLT for the Ohmic or sub-Ohmic spectrum (Markovian reservoir) is much different from that for the super-Ohmic spectrum (non-Markovian reservoir). PMID:28272546

  20. Control quantum evolution speed of a single dephasing qubit for arbitrary initial states via periodic dynamical decoupling pulses

    Science.gov (United States)

    Song, Ya-Ju; Tan, Qing-Shou; Kuang, Le-Man

    2017-03-01

    We investigate the possibility to control quantum evolution speed of a single dephasing qubit for arbitrary initial states by the use of periodic dynamical decoupling (PDD) pulses. It is indicated that the quantum speed limit time (QSLT) is determined by initial and final quantum coherence of the qubit, as well as the non-Markovianity of the system under consideration during the evolution when the qubit is subjected to a zero-temperature Ohmic-like dephasing reservoir. It is shown that final quantum coherence of the qubit and the non-Markovianity of the system can be modulated by PDD pulses. Our results show that for arbitrary initial states of the dephasing qubit with non-vanishing quantum coherence, PDD pulses can be used to induce potential acceleration of the quantum evolution in the short-time regime, while PDD pulses can lead to potential speedup and slow down in the long-time regime. We demonstrate that the effect of PDD on the QSLT for the Ohmic or sub-Ohmic spectrum (Markovian reservoir) is much different from that for the super-Ohmic spectrum (non-Markovian reservoir).

  1. Estimating Renewable Energy Economic Potential in the United States. Methodology and Initial Results

    Energy Technology Data Exchange (ETDEWEB)

    Brown, Austin; Beiter, Philipp; Heimiller, Donna; Davidson, Carolyn; Denholm, Paul; Melius, Jennifer; Lopez, Anthony; Hettinger, Dylan; Mulcahy, David; Porro, Gian

    2016-08-01

    This report describes a geospatial analysis method to estimate the economic potential of several renewable resources available for electricity generation in the United States. Economic potential, one measure of renewable generation potential, may be defined in several ways. For example, one definition might be expected revenues (based on local market prices) minus generation costs, considered over the expected lifetime of the generation asset. Another definition might be generation costs relative to a benchmark (e.g., a natural gas combined cycle plant) using assumptions of fuel prices, capital cost, and plant efficiency. Economic potential in this report is defined as the subset of the available resource technical potential where the cost required to generate the electricity (which determines the minimum revenue requirements for development of the resource) is below the revenue available in terms of displaced energy and displaced capacity. The assessment is conducted at a high geospatial resolution (more than 150,000 technology-specific sites in the continental United States) to capture the significant variation in local resource, costs, and revenue potential. This metric can be a useful screening factor for understanding the economic viability of renewable generation technologies at a specific location. In contrast to many common estimates of renewable energy potential, economic potential does not consider market dynamics, customer demand, or most policy drivers that may incent renewable energy generation.

  2. Shock initiation sensitivity and Hugoniot-based equation of state of Composition-B obtained using in situ electromagnetic gauging

    Science.gov (United States)

    Gibson, L.; Dattelbaum, Dana; Bartram, Brian; Sheffield, Stephen; Gustavsen, Richard; Handley, Caroline; Shock and Detonation Physics Team; Explosives Modelling Team

    2013-06-01

    Composition-B (Comp-B) is a solid cast explosive comprised of 59.5 wt% cyclotrimethylene-trinitramine (RDX), 39.5 wt% 2,4,6-trinitrotoluene (TNT), and 1 wt% wax. Its initial density depends on formulation method and as a result, the detonation properties of Comp-B have generally been studied at densities of 1.69 g/cm3 and 1.72 g/cm3. The shock initiation sensitivity (Pop-plot) of Comp-B has been reported previously; obtained using both explosively-driven wedge tests and embedded manganin gauge techniques. We describe the results of a series of gas-gun-driven plate-impact initiation experiments on Comp-B (ρ0 = 1.72 g/cm3) using embedded electromagnetic gauges to obtain in situ particle velocity wave profiles at 10 Lagrangian positions in each experiment. From the wave profiles, an unreacted Hugoniot locus, the run-distance-to-detonation, and initiation waveforms are obtained in each experiment. The results indicate that Comp-B at ρ0 = 1.72 g/cm3 is more sensitive than reported previously. Comparisons are made of the new Hugoniot states with an earlier Hugoniot-based EOS. Measurements of the detonation wave profile using photonic Doppler velocimetry are also presented and discussed in the context of ZND detonation theory.

  3. State of Simulation in Healthcare Education: An Initial Survey in Beijing

    Science.gov (United States)

    Zhao, Zichen; Niu, Pengfei; Ji, Xiang

    2017-01-01

    Background and Objectives: In 2013, medical error was the third leading cause of death in the United States.1 In China, as in the case with the United States, training and assessment are developing as a strategy to reduce the occurrence of such errors. The objective of this study was to assess the current state of the use of simulation-based training in Beijing and to explore the barriers to further development. Methods: This study included hospitals in Beijing accredited by the Standardized Residency Training (SRT) program. The questionnaire was designed online and distributed to the SRT management departments by e-mail or instant message. Results: Thirty hospitals were invited to participate in this survey, and 15 responses were completed and met the inclusion criteria. Task trainers (15/15), full-scale mannequins (14/15), standardized patients (12/15), and virtual reality workstations (11/15) were the most common types of simulation modalities available for use. Among the given specialties for SRT, the availability of simulation courses was 2/2 for pediatric internal medicine, 1/1 for pediatric surgery, 10/11 for surgery, 11/14 for internal medicine, 7/9 for anesthesiology, 6/8 for emergency medicine, and 3/9 for obstetrics/gynecology. Of the 13 institutions with available simulation curricula, 12/13 had simulation focused on proficiency-based skill training, 11/13 had medical knowledge learning, 10/13 had skill competency assessment. The main targeted trainees in these hospitals were residents (or postgraduate residents) and medical students (or interns). The top 2 barriers were the shortage of sustainable financial resources (12/15) and advocacy from their institutional authorities (7/15). Conclusion: It is evident that there is a need for more development of training facilities, and for training the “trainers” and administrators. Financial funding, curricular design, and research seem to be crucial for building a long-term, sustainable, effective program

  4. The Cone, the Ridge and the Fate of the Initial State Fluctuations in Heavy Ion Collisions

    CERN Document Server

    Shuryak, Edward

    2009-01-01

    The so called "cone" and "hard ridge" are structures seen in dihadron correlation function with large-$p_t$ trigger, while "soft ridge" is a similar structure seen without hard trigger. All three are related to certain energy/entropy deposition on top of overall expansion. The puzzle associated with them is why those perturbations are apparently preserved for rather long time, from the initial collision to the time of the fireball freezeout, in a still detectable form. We study two possible solutions to it: (i) a "metastable electric flux tube" option, and (ii) a "wave-splitting" acoustic option. In the former case we rely on previous works indicating that electric flux tubes can exist not only in the confining phase but in the near-$T_c$ region of the deconfined one due to high density of (color)-magnetic monopoles, up to about $T<1.4T_c$. In the latter case we study the propagation of local density fluctuations through the linearized hydrodynamics, including variable speed of sound and the overall Hubble...

  5. GLISSANDO 2: GLauber Initial-State Simulation AND mOre..., ver. 2

    CERN Document Server

    Rybczynski, Maciej; Broniowski, Wojciech; Bozek, Piotr

    2013-01-01

    We present an extended version of GLISSANDO, a Monte-Carlo generator for Glauber-like models of the initial stage of relativistic heavy-ion collisions. The increased functionality of the code incorporates a parametrization of shape of nuclei, including light nuclei needed in the NA61 experiment, the nuclear deformation, a possibility of using correlated distributions of nucleons in nuclei read from external files, an option of overlaying distributions of produced particles dependent on the space-time rapidity, the inclusion of the core-corona effect, or the output of the source distributions that can be used in event-by-event hydrodynamics. Together with other features, such as incorporation of various variants of Glauber models, or the implementation of a realistic NN collision profile, the generator offers a realistic and practical approach to describe the early phase of the collision in 3+1 dimensions; the predictions may later be used in modeling the intermediate evolution phase, e.g., with hydrodynamics....

  6. Black holes and fundamental fields in numerical relativity: Initial data construction and evolution of bound states

    Science.gov (United States)

    Okawa, Hirotada; Witek, Helvi; Cardoso, Vitor

    2014-05-01

    Fundamental fields are a natural outcome in cosmology and particle physics and might therefore serve as a proxy for more complex interactions. The equivalence principle implies that all forms of matter gravitate, and one therefore expects relevant, universal imprints of new physics in strong field gravity, such as that encountered close to black holes. Fundamental fields in the vicinities of supermassive black holes give rise to extremely long-lived, or even unstable, configurations, which slowly extract angular momentum from the black hole or simply evolve nonlinearly over long time scales, with important implications for particle physics and gravitational-wave physics. Here, we perform a fully nonlinear study of scalar-field condensates around rotating black holes. We provide novel ways to specify initial data for the Einstein—Klein—Gordon system, with potential applications in a variety of scenarios. Our numerical results confirm the existence of long-lived bar modes, which act as lighthouses for gravitational wave emission: the scalar field condenses outside the black hole geometry and acts as a constant frequency gravitational-wave source for very long time scales. This effect could turn out to be a potential signature of beyond standard model physics and also a promising source of gravitational waves for future gravitational-wave detectors.

  7. Black holes and fundamental fields in Numerical Relativity: initial data construction and evolution of bound states

    CERN Document Server

    Okawa, Hirotada; Cardoso, Vitor

    2014-01-01

    Fundamental scalar fields are a proxy for more complex interactions, and also a crucial ingredient in cosmology and particle physics: fundamental scalar fields are one of the possible solutions to the dark matter puzzle, to realize the Peccei-Quinn mechanism in QCD or the string-axiverse scenario. The equivalence principle implies that all forms of matter gravitate, and one therefore expects relevant, universal imprints of new physics in strong field gravity, such as that encountered close to black holes. Scalar fields in the vicinities of supermassive black holes give rise to extremely long-lived, or even unstable, configurations which slowly extract angular momentum from the black hole or simply evolve non-linearly over long timescales, with important implications for particle physics and gravitational-wave physics. Here, we perform a full non-linear study of scalar-field condensates around rotating black holes. We provide novel ways to specify initial data for the Einstein-Klein-Gordon system, with potenti...

  8. United States-Mexico cross-border health insurance initiatives: Salud Migrante and Medicare in Mexico.

    Science.gov (United States)

    Vargas Bustamante, Arturo; Laugesen, Miriam; Caban, Mabel; Rosenau, Pauline

    2012-01-01

    While U.S. health care reform will most likely reduce the overall number of uninsured Mexican-Americans, it does not address challenges related to health care coverage for undocumented Mexican immigrants, who will remain uninsured under the measures of the reform; documented low-income Mexican immigrants who have not met the five-year waiting period required for Medicaid benefits; or the growing number of retired U.S. citizens living in Mexico, who lack easy access to Medicare-supported services. This article reviews two promising binational initiatives that could help address these challenges-Salud Migrante and Medicare in Mexico; discusses their prospective applications within the context of U.S. health care reform; and identifies potential challenges to their implementation (legal, political, and regulatory), as well as the possible benefits, including coverage of uninsured Mexican immigrants, and their integration into the U.S. health care system (through Salud Migrante), and access to lower-cost Medicare-supported health care for U.S. retirees in Mexico (Medicare in Mexico).

  9. Statistical analysis of the correlations between cell performance and its initial states in contact resistive random access memory cells

    Science.gov (United States)

    Kao, Yun Feng; Hsieh, Wei Ting; Che Chen, Chun; King, Ya-Chin; Lin, Chrong Jung

    2017-04-01

    Variability has been one of the critical challenges in the implementation of large resistive random access memory (RRAM) arrays. Wide variations in set/reset, read and cycling characteristics can significantly reduce the design margin and feasibility of a memory array. Predicting the characteristics of RRAM cells is constructive to provide insights and to adjust the memory operations accordingly. In this study, a strong correlation between the cell performance and its initial state is found in contact RRAM (CRRAM) cells by 28 nm CMOS logic technology. Furthermore, a verify-reset operation is proposed to identify the type of conductive filament (CF) in a cell. Distinctive CRRAM characteristics are found to be linked directly to initial CFs, enabling preliminary screening and adaptive resets to address the large variability problems in sizable CRRAM arrays.

  10. Different mechanisms for hole and electron transfer along identical molecular bridges: the importance of the initial state delocalization.

    Science.gov (United States)

    Gorczak, Natalie; Tarkuç, Simge; Renaud, Nicolas; Houtepen, Arjan J; Eelkema, Rienk; Siebbeles, Laurens D A; Grozema, Ferdinand C

    2014-06-05

    We report measurements of hole and electron transfer along identical oligo-p-phenylene molecular bridges of increasing length. Although the injection barriers for hole and electron transfer are similar, we observed striking differences in the distance dependence and absolute magnitude of the rates of these two processes. Electron transfer is characterized by an almost distance-independent, fast charge-transfer rate. Hole transfer presents a much slower rate that decreases significantly with the length of the bridge. Time-dependent density functional calculations show that the observed differences can be explained by the delocalization of the respective initial excitation. The evaluation of the initial state is therefore essential when comparing charge-transfer rates between different donor-bridge-acceptor systems.

  11. A Collaborative State of the Science Initiative: Transforming Moral Distress into Moral Resilience in Nursing.

    Science.gov (United States)

    Rushton, Cynda Hylton; Schoonover-Shoffner, Kathy; Kennedy, Maureen Shawn

    2017-02-01

    : To examine practices for addressing moral distress, a collaborative project was developed by the Johns Hopkins Berman Institute of Bioethics, the Johns Hopkins School of Nursing, the American Journal of Nursing, and the Journal of Christian Nursing, along with the American Association of Critical-Care Nurses and the American Nurses Association. Its purpose was to identify strategies that individuals and systems can use to mitigate the detrimental effects of moral distress and foster moral resilience. On August 11 and 12, 2016, an invitational symposium, State of the Science: Transforming Moral Distress into Moral Resilience in Nursing, was held at the Johns Hopkins School of Nursing in Baltimore, Maryland. Forty-five nurse clinicians, researchers, ethicists, organization representatives, and other stakeholders took part. The result of the symposium was group consensus on recommendations for addressing moral distress and building moral resilience in four areas: practice, education, research, and policy. Participants and the organizations represented were energized and committed to moving this agenda forward.

  12. Initial-State Bremsstrahlung versus Final-State Hydrodynamic Sources of Azimuthal Harmonics in p+A at RHIC and LHC

    CERN Document Server

    Gyulassy, Miklos; Vitev, Ivan; Biro, Tamas S

    2014-01-01

    Recent pT<2~GeV azimuthal correlation data from the Beam Energy Scan (BES) and D+Au runs at RHIC/BNL and, especially, the surprising similarity of azimuthal $v_n\\{2m\\}(p_T)$ ``transeverse flow'' harmonics in $p+Pb$ and $Pb+Pb$ at LHC have challenged the uniqueness of local equilibrium ``perfect fluid'' interpretations of those data. We report results at QM14 on azimuthal harmonics associated with initial-state non-abelian ``wave interference'' effects predicted by perturbative QCD gluon bremsstrahlung and sourced by Color Scintillation Arrays (CSA) of color antennas. CSA are naturally identified with multiple projectile and target beam jets produced in inelastic p+A reactions. We find a remarkable similarity between azimuthal harmonics sourced by initial state CSA and those predicted with final state perfect fluid models of high energy p+A reactions. The question of which mechanism dominates in $p+A$ and $A+A$ remains open at this time.

  13. Initial-state bremsstrahlung versus final-state hydrodynamic sources of azimuthal harmonics in p+A at RHIC and LHC

    Energy Technology Data Exchange (ETDEWEB)

    Gyulassy, M. [MTA WIGNER Research Centre for Physics, RMI, Budapest (Hungary); Department of Physics, Columbia University, New York, NY 10027 (United States); Levai, P. [MTA WIGNER Research Centre for Physics, RMI, Budapest (Hungary); Vitev, I. [Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Biró, T.S. [MTA WIGNER Research Centre for Physics, RMI, Budapest (Hungary)

    2014-11-15

    Recent p{sub T}<2 GeV azimuthal correlation data from the Beam Energy Scan (BES) and d+Au runs at RHIC/BNL and, especially, the surprising similarity of 2ℓ=2,4,⋯-particle cummulant azimuthal n=2,3,4,5 harmonics, v{sub n}{2ℓ}(p{sub T}), in p+Pb and Pb+Pb at LHC have challenged the uniqueness of local equilibrium “perfect fluid” interpretations of those data. We report results derived in [1] on azimuthal harmonics arising from non-equilibrium initial-state non-abelian “wave interference” effects predicted by perturbative QCD gluon bremsstrahlung and sourced by Color Scintillation Arrays (CSA) of color antennas. CSA are naturally identified with multiple projectile and target beam jets produced in inelastic p+A reactions. We find a remarkable similarity between azimuthal harmonics sourced by initial state CSA and those predicted with final state perfect fluid models of high energy p+A reactions. The question of which mechanism dominates in p+A and A+A remains open at this time.

  14. The beryllium production at Ulba metallurgical plant (Ust-Kamenogrsk, Kazakhstan)

    Energy Technology Data Exchange (ETDEWEB)

    Dvinskykh, E.M.; Savchuk, V.V.; Tuzov, Y.V. [Ulba Metallurgical Plant (Zavod), Ust-Kamenogorsk, Abay prospect 102 (Kazakhstan)

    1998-01-01

    The Report includes data on beryllium production of Ulba metallurgical plant, located in Ust-Kamenogorsk (Kazakhstan). Beryllium production is showed to have extended technological opportunities in manufacturing semi-products (beryllium ingots, master alloys, metallic beryllium powders, beryllium oxide) and in production of structural beryllium and its parts. Ulba metallurgical plant owns a unique technology of beryllium vacuum distillation, which allows to produce reactor grades of beryllium with a low content of metallic impurities. At present Ulba plant does not depend on raw materials suppliers. The quantity of stored raw materials and semi-products will allow to provide a 25-years work of beryllium production at a full capacity. The plant has a satisfactory experience in solving ecological problems, which could be useful in ITER program. (author)

  15. Measurements of the communication noise level on the internal roads of the manufacturing metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2012-07-01

    Full Text Available This publication shows the results of measurements of the noise level emitted by the motor trucks on the internal roads of the steelworks. The distribution of the metallurgical products with the use of trucks is, next to the rail transport, one of the main logistic forms of products delivery to the customer. The research was conducted on one of the busiest internal roads of metallurgical enterprise ArcelorMittal Poland in Dąbrowa Górnicza. The enterprise conducts the whole production cycle and is the biggest steel producer in Poland. On the premises of the steelworks there were five points of measurements marked where the noise level is measured and the results were compared with the acceptable noise levels defined in the norms.

  16. Observation of e+e- to K+K-J/psi via Initial State Radiation at Belle

    CERN Document Server

    Yuan, C Z; Wang, P; Wang, X L; Adachi, I; Aihara, H; Arinstein, K; Aulchenko, V; Aushev, T; Bakich, A M; Balagura, V; Barberio, E; Belous, K S; Bitenc, U; Bondar, A; Bracko, M; Brodzicka, J; Browder, T E; Chao, Y; Chen, A; Chen, W T; Cheon, B G; Chistov, R; Cho, I S; Choi, Y; Dalseno, J; Danilov, M; Das, A; Dash, M; Eidelman, S; Epifanov, D; Gabyshev, N; Golob, B; Ha, H; Haba, J; Hayasaka, K; Hazumi, M; Heffernan, D; Hokuue, T; Hoshi, Y; Hou, W S; Hyun, H J; Inami, K; Ishikawa, A; Ishino, H; Itoh, R; Iwasaki, Y; Kah, D H; Kang, J H; Kawai, H; Kawasaki, T; Kim, Y J; Kinoshita, K; Korpar, S; Krokovny, P; Kumar, R; Kuo, C C; Kuzmin, A; Kwon, Y J; Lee, M J; Lee, S E; Lesiak, T; Lin, S W; Liventsev, D; Mandl, F; Matyja, A; McOnie, S; Medvedeva, T; Mitaroff, W A; Miyabayashi, K; Miyake, H; Miyata, H; Miyazaki, Y; Mizuk, R; Mohapatra, D; Moloney, G R; Nagasaka, Y; Nakao, M; Nishida, S; Nitoh, O; Noguchi, S; Nozaki, T; Ogawa, S; Ohshima, T; Okuno, S; Olsen, S L; Pakhlov, P; Pakhlova, G; Park, C W; Park, H; Peak, L S; Piilonen, L E; Sahoo, H; Sakai, Y; Schneider, O; Schümann, J; Senyo, K; Sevior, M E; Shapkin, M; Shibuya, H; Shiu, J G; Shwartz, B; Singh, J B; Stanic, S; Staric, M; Sumiyoshi, T; Takasaki, F; Tamai, K; Tanaka, M; Teramoto, Y; Tikhomirov, I; Uehara, S; Uglov, T; Unno, Y; Uno, S; Urquijo, P; Usov, Yu; Varner, G; Vervink, K; Villa, S; Wang, C C; Wang, C H; Watanabe, Y; Won, E; Yabsley, B D; Yamaguchi, A; Yamashita, Y; Yamauchi, M; Zhang, C C; Zhang, Z P; Zupanc, A; Zyukova, O

    2007-01-01

    The process e+e- to K+K-J/psi is observed for the first time via initial state radiation. The cross section of e+e- to K+K-J/psi for center-of-mass energies between threshold and 6.0 GeV is measured using 673 fb^{-1} of data collected with the Belle detector on and off the Upsilon(4S) resonance. We also find evidence for e+e- to K_S K_S J/psi in the same energy region.

  17. Initial-State Radiation Measurement of the e+e- -> pi+pi-pi+pi- Cross Section

    CERN Document Server

    Lees, J.P.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Milanes, D.A.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Brown, David Nathan; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Koch, H.; Schroeder, T.; Asgeirsson, D.J.; Hearty, C.; Mattison, T.S.; McKenna, J.A.; Khan, A.; Blinov, V.E.; Buzykaev, A.R.; Druzhinin, V.P.; Golubev, V.B.; Kravchenko, E.A.; Onuchin, A.P.; Serednyakov, S.I.; Skovpen, Yu.I.; Solodov, E.P.; Todyshev, K.Yu.; Yushkov, A.N.; Bondioli, M.; Kirkby, D.; Lankford, A.J.; Mandelkern, M.; Stoker, D.P.; Atmacan, H.; Gary, J.W.; Liu, F.; Long, O.; Vitug, G.M.; Campagnari, C.; Hong, T.M.; Kovalskyi, D.; Richman, J.D.; West, C.A.; Eisner, A.M.; Kroseberg, J.; Lockman, W.S.; Martinez, A.J.; Schalk, T.; Schumm, B.A.; Seiden, A.; Cheng, C.H.; Doll, D.A.; Echenard, B.; Flood, K.T.; Hitlin, D.G.; Ongmongkolkul, P.; Porter, F.C.; Rakitin, A.Y.; Andreassen, R.; Dubrovin, M.S.; Huard, Z.; Meadows, B.T.; Sokoloff, M.D.; Sun, L.; Bloom, P.C.; Ford, W.T.; Gaz, A.; Nagel, M.; Nauenberg, U.; Smith, J.G.; Wagner, S.R.; Ayad, R.; Toki, W.H.; Spaan, B.; Kobel, M.J.; Schubert, K.R.; Schwierz, R.; Bernard, D.; Verderi, M.; Clark, P.J.; Playfer, S.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Munerato, M.; Negrini, M.; Piemontese, L.; Santoro, V.; Baldini-Ferroli, R.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Nicolaci, M.; Patteri, P.; Peruzzi, I.M.; Piccolo, M.; Rama, M.; Zallo, A.; Contri, R.; Guido, E.; Lo Vetere, M.; Monge, M.R.; Passaggio, S.; Patrignani, C.; Robutti, E.; Bhuyan, B.; Prasad, V.; Lee, C.L.; Morii, M.; Edwards, A.J.; Adametz, A.; Marks, J.; Uwer, U.; Bernlochner, F.U.; Ebert, M.; Lacker, H.M.; Lueck, T.; Dauncey, P.D.; Tibbetts, M.; Behera, P.K.; Mallik, U.; Chen, C.; Cochran, J.; Meyer, W.T.; Prell, S.; Rosenberg, E.I.; Rubin, A.E.; Gritsan, A.V.; Guo, Z.J.; Arnaud, N.; Davier, M.; Grosdidier, G.; Le Diberder, F.; Lutz, A.M.; Malaescu, B.; Roudeau, P.; Schune, M.H.; Stocchi, A.; Wormser, G.; Lange, D.J.; Wright, D.M.; Bingham, I.; Chavez, C.A.; Coleman, J.P.; Fry, J.R.; Gabathuler, E.; Hutchcroft, D.E.; Payne, D.J.; Touramanis, C.; Bevan, A.J.; Di Lodovico, F.; Sacco, R.; Sigamani, M.; Cowan, G.; Brown, David Norvil; Davis, C.L.; Denig, A.G.; Fritsch, M.; Gradl, W.; Hafner, A.; Prencipe, E.; Alwyn, K.E.; Bailey, D.; Barlow, R.J.; Jackson, G.; Lafferty, G.D.; Behn, E.; Cenci, R.; Hamilton, B.; Jawahery, A.; Roberts, D.A.; Simi, G.; Dallapiccola, C.; Cowan, R.; Dujmic, D.; Sciolla, G.; Lindemann, D.; Patel, P.M.; Robertson, S.H.; Schram, M.; Biassoni, P.; Lazzaro, A.; Lombardo, V.; Neri, N.; Palombo, F.; Stracka, S.; Cremaldi, L.; Godang, R.; Kroeger, R.; Sonnek, P.; Summers, D.J.; Nguyen, X.; Taras, P.; De Nardo, G.; Monorchio, D.; Onorato, G.; Sciacca, C.; Raven, G.; Snoek, H.L.; Jessop, C.P.; Knoepfel, K.J.; LoSecco, J.M.; Wang, W.F.; Honscheid, K.; Kass, R.; Brau, J.; Frey, R.; Sinev, N.B.; Strom, D.; Torrence, E.; Feltresi, E.; Gagliardi, N.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simonetto, F.; Stroili, R.; Akar, S.; Ben-Haim, E.; Bomben, M.; Bonneaud, G.R.; Briand, H.; Calderini, G.; Chauveau, J.; Hamon, O.; Leruste, Ph.; Marchiori, G.; Ocariz, J.; Sitt, S.; Biasini, M.; Manoni, E.; Pacetti, S.; Rossi, A.; Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Cervelli, A.; Forti, F.; Giorgi, M.A.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Perez, A.; Rizzo, G.; Walsh, J.J.; Lopes Pegna, D.; Lu, C.; Olsen, J.; Smith, A.J.S.; Telnov, A.V.; Anulli, F.; Cavoto, G.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Li Gioi, L.; Mazzoni, M.A.; Piredda, G.; Bunger, C.; Grunberg, O.; Hartmann, T.; Leddig, T.; Schroder, H.; Waldi, R.; Adye, T.; Olaiya, E.O.; Wilson, F.F.; Emery, S.; de Monchenault, G.Hamel; Vasseur, G.; Y\\`, Ch.; Aston, D.; Bard, D.J.; Bartoldus, R.; Cartaro, C.; Convery, M.R.; Dorfan, J.; Dubois-Felsmann, G.P.; Dunwoodie, W.; Field, R.C.; Franco Sevilla, M.; Fulsom, B.G.; Gabareen, A.M.; Graham, M.T.; Grenier, P.; Hast, C.; Innes, W.R.; Kelsey, M.H.; Kim, H.; Kim, P.; Kocian, M.L.; Leith, D.W.G.S.; Lewis, P.; Li, S.; Lindquist, B.; Luitz, S.; Luth, V.; Lynch, H.L.; MacFarlane, D.B.; Muller, D.R.; Neal, H.; Nelson, S.; Ofte, I.; Perl, M.; Pulliam, T.; Ratcliff, B.N.; Roodman, A.; Salnikov, A.A.; Schindler, R.H.; Snyder, A.; Su, D.; Sullivan, M.K.; Va'vra, J.; Wagner, A.P.; Weaver, M.; Wisniewski, W.J.; Wittgen, M.; Wright, D.H.; Wulsin, H.W.; Yarritu, A.K.; Young, C.C.; Ziegler, V.; Park, W.; Purohit, M.V.; White, R.M.; Wilson, J.R.; Randle-Conde, A.; Sekula, S.J.; Bellis, M.; Benitez, J.F.; Burchat, P.R.; Miyashita, T.S.; Alam, M.S.; Ernst, J.A.; Gorodeisky, R.; Guttman, N.; Peimer, D.R.; Soffer, A.; Lund, P.; Spanier, S.M.; Eckmann, R.; Ritchie, J.L.; Ruland, A.M.; Schilling, C.J.; Schwitters, R.F.; Wray, B.C.; Izen, J.M.; Lou, X.C.; Bianchi, F.; Gamba, D.; Lanceri, L.; Vitale, L.; Martinez-Vidal, F.; Oyanguren, A.; Ahmed, H.; Albert, J.; Banerjee, Sw.; Choi, H.H.F.; King, G.J.; Kowalewski, R.; Lewczuk, M.J.; Nugent, I.M.; Roney, J.M.; Sobie, R.J.; Tasneem, N.; Gershon, T.J.; Harrison, P.F.; Latham, T.E.; Puccio, E.M.T.; Band, H.R.; Dasu, S.; Pan, Y.; Prepost, R.; Wu, S.L.

    2012-01-01

    We study the process e+e- -> pi+pi-pi+pi-gamma, with a photon emitted from the initial-state electron or positron, using 454.3 fb^-1 of data collected with the BABAR detector at SLAC, corresponding to approximately 260,000 signal events. We use these data to extract the non-radiative sigma(e+e- ->pi+pi-pi+pi-) cross section in the energy range from 0.6 to 4.5 Gev. The total uncertainty of the cross section measurement in the peak region is less than 3%, higher in precision than the corresponding results obtained from energy scan data.

  18. Powder metallurgical processing of a SiC particle reinforced Al-6wt.%Fe alloy

    OpenAIRE

    Staniek, G.; Lehnert, F.; Peters, M; Bunk, W.; Kaysser, W.

    1993-01-01

    Discontinuously reinforced aluminum alloys for elevated temperatures with a matrix hardened by intermetallic phases generally have to be produced by powder metallurgy because of their high content of alloying elements. The objective of this investigation was the evaluation of powder metallurgical processing for an A16Fe powder alloy containing various fractions and volume contents of SiC particles. During processing, the effect of powder mixing on SiC particle distribution in the extruded pro...

  19. Background and principles of self-organizing jet-emulsion metallurgical unit

    Science.gov (United States)

    Tsymbal, V. P.; Kozhemyachenko, V. I.; Rybenko, I. A.; Mochalov, S. P.; Padalko, A. G.; Kalashnikov, S. N.; Krasnoperov, S. Yu; Ermakova, L. A.; Olennikov, A. A.

    2016-09-01

    The basic principles laid in the creation of a new jet-emulsion process and metallurgical unit were considered. Development of self-organizing oscillator reactor, bottom feed of the prepared in it combustible mixture to the column reactor and a large deviation from the thermodynamic equilibrium allow dissipative structure to be created, and thus control the ratio of reducing and oxidizing processes, the carbon content in the metal.

  20. China Metallurgical Group and Jiangxi Copper Having Signed Agreement on Copper Mines with Afghanistan

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    <正>On May 25,the joint investment combo formed by China Metallurgical Group Corp.(MCC) and Jiangxi Copper Co.has formally signed agreement with Afghan government in Kabul on the exploitation of Aynak copper mine.The mine is situated in the north of Loghar in the middle east of Afghanistan,which is about 35km from the Capital City of Kabul.The ex- tra-large copper mine was found at the begin-

  1. FINDING WAYS OF RECYCLING DUST OF ARC STEEL FURNACES AT THE BELARUSIAN METALLURGIC PLANT

    Directory of Open Access Journals (Sweden)

    A. V. Demin

    2015-01-01

    Full Text Available The first part examines the theoretical possibility of recycling dust of arc steel furnaces. The different modes of dust disposal depending on the task of recycling are discussed: recycling at minimal cost; recycling with a maximum extraction of iron; recycling with maximum extraction of zinc. The results of laboratory studies providing information on the technical feasibility of recycling dust formed at the Belarusian metallurgic plant are provided.

  2. Applications of optimal mathematic-physical models in metallurgical manufacture scheduling system at Baosteel

    Institute of Scientific and Technical Information of China (English)

    Jian Qiu; Naiyuan Tian; Zhixin Lu; Guowei Sun

    2003-01-01

    The transfer of mass flow between ironmaking and steelmaking process at Baoshan Iron and Steel Co. Ltd. has been analyzed. The mathematic-physical models of transport scheduling for hot metal manufacturing have been researched combined with the practical problem in the metallurgical manufacture procedure. Taking into account these models, the scheduling software has been designed, programmed and tested on-line. The new automation system of production scheduling has been implemented successfully at Baosteel, which produces a great economic benefit.

  3. Software for simulation of utilization schemes of secondary energy from the exhaust gases of metallurgical units

    Science.gov (United States)

    Olennikov, A. A.; Tsymbal, V. P.

    2016-09-01

    The work is devoted to the program complex intended for designing schemes of secondary energy utilization from metallurgical units. The structure of the software system is based on three levels of complex systems assembled from subsystems. The mathematical models of a complex process of heat transfer and gas dynamics occurring in the energy utilization units and gas cleaning devices. We describe the user interaction with the software package, and show the calculation results in the form of plots.

  4. The identification of zones of amplification of disruptions in network supply chains of metallurgic products

    Directory of Open Access Journals (Sweden)

    M. Kramarz

    2015-01-01

    Full Text Available An increase in the number of participants in a supply chain and network relations results in an increase in the complexity of the entire logistic and production system. Consequently, there appear additional potential sources of disruptions in material flows. The aim of the research presented in the article is to identify the zones of amplification of disruptions in network supply chains of metallurgic products.

  5. Evaluation of professional risk of malignant new tumors in workers of mining metallurgical plant

    OpenAIRE

    Igor Kudryavcev

    2010-01-01

    The study has showed the existence of high professional risk(standardized relative risk) of malignant new tumors (MNT)development in major productions of Navoi Mining andMetallurgical Combine (NMMC) in not less than 60% of populationinvolved in working environment and labor process. Less than high,but statistically significant professional risk exists for employees ofsubsidiary industries, who periodically are exposed to complexproduction-professional factors. This necessitates the developmen...

  6. Measurement of $e^+e^- \\to \\gamma\\chi_{cJ}$ via initial state radiation at Belle

    CERN Document Server

    Han, Y L; Yuan, C Z; Shen, C P; Wang, P; Abdesselam, A; Adachi, I; Aihara, H; Said, S Al; Asner, D M; Aushev, T; Babu, V; Badhrees, I; Bansal, V; Bhardwaj, V; Biswal, J; Bozek, A; Bračko, M; Chen, A; Cheon, B G; Chistov, R; Cho, K; Chobanova, V; Choi, S -K; Cinabro, D; Dalseno, J; Danilov, M; Doležal, Z; Drutskoy, A; Dutta, D; Eidelman, S; Farhat, H; Fast, J E; Ferber, T; Fulsom, B G; Gaur, V; Gabyshev, N; Garmash, A; Getzkow, D; Gillard, R; Glattauer, R; Goh, Y M; Goldenzweig, P; Golob, B; Haba, J; Hayasaka, K; Hayashii, H; He, X H; Horiguchi, T; Hou, W -S; Iijima, T; Ishikawa, A; Jaegle, I; Joffe, D; Joo, K K; Kichimi, H; Kim, D Y; Kim, J B; Kim, J H; Kim, K T; Kim, S H; Kim, Y J; Kinoshita, K; Ko, B R; Kodyš, P; Križan, P; Krokovny, P; Lewis, P; Gioi, L Li; Libby, J; Liventsev, D; Lukin, P; Masuda, M; Matvienko, D; Miyabayashi, K; Miyata, H; Mizuk, R; Moll, A; Moon, H K; Mussa, R; Nakano, E; Nakao, M; Nayak, M; Nisar, N K; Nishida, S; Ogawa, S; Okuno, S; Ostrowicz, W; Pakhlov, P; Pakhlova, G; Pal, B; Park, H; Pedlar, T K; Pestotnik, R; Petrič, M; Piilonen, L E; Pulvermacher, C; Ribežl, E; Ritter, M; Rostomyan, A; Sahoo, H; Sakai, Y; Sandilya, S; Santelj, L; Sanuki, T; Schneider, O; Schnell, G; Schwanda, C; Senyo, K; Sevior, M E; Shapkin, M; Shebalin, V; Shibata, T -A; Shiu, J -G; Shwartz, B; Simon, F; Sohn, Y -S; Sokolov, A; Solovieva, E; Stanič, S; Steder, M; Sumihama, M; Tamponi, U; Teramoto, Y; Uchida, M; Uehara, S; Uglov, T; Unno, Y; Uno, S; Usov, Y; Van Hulse, C; Vanhoefer, P; Varner, G; Vossen, A; Wagner, M N; Watanabe, Y; Williams, K M; Yashchenko, S; Yook, Y; Zhang, C C; Zhang, Z P; Zhilich, V; Zhulanov, V; Zupanc, A

    2015-01-01

    The process $e^+e^- \\to \\gamma\\chi_{cJ}$ ($J$=1, 2) is studied via initial state radiation using 980 fb$^{-1}$ of data at and around the $\\Upsilon(nS)$ ($n$=1, 2, 3, 4, 5) resonances collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. No significant signal is observed except from $\\psi(2S)$ decays. Upper limits on the cross sections between $\\sqrt{s}=3.80$ and $5.56~{\\rm GeV}$ are determined at the 90% credibility level, which range from few pb to a few tens of pb. We also set upper limits on the decay rate of the vector charmonium [$\\psi(4040$), $\\psi(4160)$, and $\\psi(4415)$] and charmoniumlike [$Y(4260)$, $Y(4360)$, and $Y(4660)$] states to $\\gamma\\chi_{cJ}$.

  7. Librarian-initiated HIV/AIDS prevention intervention program outcome in rural communities in Oyo State, Nigeria.

    Science.gov (United States)

    Ajuwon, G A; Komolafe-Opadeji, H O; Ikhizama, B

    2013-01-01

    The objective of this study was to meet the HIV/AIDS information and service needs of citizens living in selected rural, underserved communities in Oyo State, Nigeria. This was a librarian-initiated intervention program (pre-post) study of heads of rural households in Oyo State. A questionnaire was used for pre- and post-intervention assessment. The education covered knowledge about HIV/AIDS, routes of transmission, prevention strategies, and attitude toward persons living with HIV. It increased participants' knowledge about AIDS and improved attitude toward those living with HIV. Provision and dissemination of information on HIV/AIDS through librarians to rural settlers is an important prevention strategy and librarians can make major contributions.

  8. Relationship between metallurgical works and the budget: debt increases, taxes decline

    Directory of Open Access Journals (Sweden)

    Anna Ivanovna Povarova

    2015-01-01

    Full Text Available Large enterprises of ferrous metallurgy consolidate a significant share of cash flows and are important taxpayers for the budget. In 2008–2013 two-thirds of the aggregate profit tax from the ferrous metallurgical industry were provided by seven largest plants: Novolipetsk Steel (NLMK; Cherepovets Steel Mill (CherMK; Nizhniy Tagil Iron and Steel Works (NTMK; Magnitogorsk Iron and Steel Works (MMK; Oskol Electrometallurgical Plant (OEMK; West-Siberian Metallurgical Plant (ZSMK and Chelyabinsk Metallurgical Plant (ChMK. All these plants are the key assets of the largest multinational corporations; therefore, the analysis of their statements makes it possible to assess the financial condition not only of individual corporations, but also of the whole ferrous metallurgy. The article presents the results of the analysis of the financial statements of the leading domestic enterprises of ferrous metallurgy for 2008–2013. Particular emphasis is placed on their relations with the budget in the field of profit tax administration. The author investigates the factors in the formation of profit before tax and reveals the destructive impact of the existing tax legislation on the mobilization of budget revenues. The article draws a conclusion about the role of large enterprises in the economic development of the country and its regions. The author proposes several options to change the tax policy in relation to large taxpayers

  9. Electric arc spraying for restoration and repair of metallurgical equipment parts

    Directory of Open Access Journals (Sweden)

    В’ячеслав Олександрович Роянов

    2016-07-01

    Full Text Available It has been shown that the electric arc spraying with the use of powder wires can be used to repair and restore parts of metallurgical equipment. The technology of spraying parts by means of the cored wire Steelcored M8TUV; T462MMIN5 and combinations of steel and aluminum wires to restore shaft-gears, shaft-beams, cranes axles for the foundry of the Moldavian Metallurgical Plant has been introduced. The composition of the flux-cored wires MMP-2,3 developed at the Department of Equipment and welding production technology of PSTU that provides the required hardness and adhesion of the coating and the substrate have been shown and the results of the coatings properties studies have been published. Studies have shown matching properties of the coatings to be used for details of the metallurgical equipment working under difficult conditions, including the rolls of rolling mills. Cored wire was used for pilot plating of the rolls surface of the skin-rolling stand at the cold-rolling mill at Illich Steel and Iron Works, Mariupol. Residual coating thickness ranged from 15 to 25 microns. Strip sized 0,9 × 1025 mm has been rolled, the squeezing is equal to 0,8...1,0%.

  10. Low resistance silver contacts to indium phosphide - Electrical and metallurgical considerations

    Science.gov (United States)

    Weizer, Victor G.; Fatemi, Navid S.

    1993-03-01

    The electrical and metallurgical behavior of the Ag-InP contact system has been investigated. Specific contact resistivity (Rc) values in the low 10 exp -6 Ohm sq cm range are readily achieved on n-InP (Si: 1.7 x 10 exp 18/cu cm) after sintering at 400 C for several minutes. The low Rc values, however, are shown to be accompanied by dissolution of InP into the metallization, resulting in device degradation. An analysis of the sinter-induced metallurgical interactions shows this system to be similar to the well-characterized Au-InP system, albeit with fundamental differences. The similarities include the dissociative diffusion of In, the reaction-suppressing effect of SiO2 capping, and especially, the formation of a phosphide layer at the metal-InP interface. The low post-sinter Rc values in the Ag-InP system may be due to the presence of a AgP2 layer at the metal-InP interface; low values of Rc can be achieved without incurring device degrading metallurgical interactions by introducing a thin AgP2 layer between the InP and the current carrying metallization.

  11. Metallurgical bonding development of V-4Cr-4Ti alloy for the DIII-D radiative divertor program

    Energy Technology Data Exchange (ETDEWEB)

    Smith, J.P.; Johnson, W.R.; Trester, P.W. [General Atomics, San Diego, CA (United States)

    1998-10-01

    General atomics (GA), in conjunction with the Department of Energy`s (DOE) DIII-D Program, is carrying out a plan to utilize a vanadium alloy in the DIII-D tokamak as part of the DIII-D radiative divertor (RD) upgrade. The V-4Cr-4Ti alloy has been selected in the U.S. as the leading candidate vanadium alloy for fusion applications. This alloy will be used for the divertor fabrication. Manufacturing development with the V-4Cr-4Ti alloy is a focus of the DIII-D RD Program. The RD structure, part of which will be fabricated from V-4Cr-4Ti alloy, will require many product forms and types of metal/metal bonded joints. Metallurgical bonding methods development on this vanadium alloy is therefore a key area of study by GA. Several solid-state (non-fusion weld) and fusion weld joining methods are being investigated. To date, GA has been successful in producing ductile, high-strength, vacuum leak-tight joints by all of the methods under investigation. The solid-state joining was accomplished in air, i.e., without the need for a vacuum or inert gas environment to prevent interstitial impurity contamination of the V-4Cr-4Ti alloy. (orig.) 7 refs.

  12. Revisiting (Some of) the Lasting Impacts of the Liberty Ships via a Metallurgical Analysis of Rivets from the SS "John W. Brown"

    Science.gov (United States)

    Harris, M. D.; Grogg, W. J.; Akoma, A.; Hayes, B. J.; Reidy, R. F.; Imhoff, E. F.; Collins, P. C.

    2015-12-01

    During World War II, 2710 Liberty ships were built in the United States across 18 ship yards. The rate of production of these ships was at a scale not previously witnessed, reflecting a strategic marshaling of national assets critical to the war effort. For the metallurgist, metallurgical engineer, or materials scientist, these ships also struck commanding images regarding their catastrophic failures. The study of these failures led to increased understanding of brittle fracture, fracture mechanics, and ductile-to-brittle transition temperatures. The post-mortem studies of Liberty ships highlighted the importance of composition and microstructure in controlling the properties of steel in fracture-critical applications. This study examines a rivet from the SS "John W. Brown", which was assembled in Baltimore, Maryland, and launched in September 1942, The "John W. Brown" was restored between 1988 and 1991. Classical metallurgical analysis of a rivet from the original 1942 vessel is compared with modern rivets used during its restoration. The rivets provide an analogue to the plate material used in these ships. A comparison of these materials is presented along with a discussion of the importance of composition-microstructure-property relationships that concomitantly evolved.

  13. Ice core based Pb pollution from gasoline in South America in the context of a 2000 year metallurgical history

    Science.gov (United States)

    Eichler, Anja; Gramlich, Gabriela; Kellerhals, Thomas; Tobler, Leonhard; Schwikowski, Margit

    2015-04-01

    Lead (Pb) is highly neurotoxic and, in contrast to many other heavy metals including cobalt, copper, and zinc, it has no beneficial effects to humans even at low concentrations. The introduction of leaded gasoline in the 1920s initiated a period of unabated growth in the global emissions of Pb. Prior to the onset of leaded gasoline phase-out in the 1970s, atmospheric Pb levels increased dramatically. Long-term histories of Pb pollution in Eastern and Western Europe, Asia, and North America suggest that emissions from leaded gasoline within the Northern Hemisphere are dominant compared to that from metallurgy and coal combustion during the second half of the 20th century. However, there is no equivalent data for Southern America. Although exploitation of the extensive polymetallic deposits of the Andean Altiplano in South America since pre-colonial times has caused substantial emissions of neurotoxic Pb into the atmosphere, its historical significance compared to recent Pb pollution from leaded gasoline is not yet resolved. Here we present the first comprehensive, high-resolution two millennia Pb emission history for South America, based on ice core records of Pb concentrations, Pb enrichment factors (EFs), and Pb isotope ratios from Illimani glacier in Bolivia. Complementary to local air pollution recorded in lake sediments, ice cores from mid latitude glaciers provide information about more extended source areas. Illimani is the highest mountain of the eastern Bolivian Andes and is located at the northeastern margin of the Bolivian Altiplano. The ice core Pb deposition history revealed enhanced Pb EFs due to metallurgical processing for silver production during periods of the Tiwanaku/Wari culture (AD 450-950), the Inca empires (AD 1450-1532), colonial times (AD 1532-1900), and tin production at the beginning of the 20th century. After the 1960s 208Pb/207Pb ratios decreased significantly, whereas Pb EFs increased by a factor of three compared to the emission level

  14. Return of the King: Time-Series Photometry of FO Aquarii's Initial Recovery from its Unprecedented 2016 Low State

    CERN Document Server

    Littlefield, Colin; Kennedy, Mark R; Aadland, Erin; Terndrup, Donald M; Calhoun, Grace V; Callanan, Paul; Abe, Lyu; Bendjoya, Philippe; Rivet, Jean-Pierre; Vernet, David; Devogele, Maxime; Bonnardeau, Michel; Debackere, Andre; Dvorak, Shawn; Foster, James R; Goff, William; Hambsch, Franz-Josef; Harris, Barbara; Myers, Gordon; Nelson, Peter; Popov, Velimir; Solomon, Rob; Stein, William L; Stone, Geoff

    2016-01-01

    In 2016 May, the intermediate polar FO Aqr was detected in a low state for the first time in its observational history. We report time-resolved photometry of the system during its initial recovery from this faint state. Our data, which includes high-speed photometry with cadences of just 2 sec, shows the existence of very strong periodicities at 22.5 min and 11.26 min, equivalent to the spin-orbit beat frequency and twice its value, respectively. A pulse at the spin frequency is also present but at a much lower amplitude than is normally observed in the bright state. By comparing our power spectra with theoretical models, we infer that a substantial amount of accretion was stream-fed during our observations, in contrast to the disk-fed accretion that dominates the bright state. In addition, we find that FO Aqr's rate of recovery has been unusually slow, with an $e$-folding time of 116$\\pm4$ days. The recovery also shows irregular variations in the median brightness of as much as 0.2 mag over a 10-day span. Fi...

  15. Metallurgical reactions in the coalescence zone between a reinforcement and a base metal in reinforced brazed joints

    Directory of Open Access Journals (Sweden)

    Zorc, B.

    2004-12-01

    Full Text Available A reinforcement wire added to a brazed joint strongly improves the properties of the joint, i.e., its strength, toughness and resistance to crack initiation and propagation. This effect, however, can be achieved only if the reinforcement wire is of a suitable shape, from an appropriate material as regards the base metal and the brazing alloy and it coalesces strongly and toughly with the base metal. The properties of such a joint depend on the reinforcement wire and not on the brazing alloy. The most favourable reinforcement shape was determined. Metallurgical reactions among the base metal, the brazing alloy, and the reinforcement were studied.

    La armadura, añadida a las uniones fuertemente soldadas, mejora considerablemente las características de la unión, es decir, su dureza, tenacidad y resistencia frente a la formación y propagación de la grieta separada. Se puede alcanzar dicho resultado solamente si el alambre de la armadura tiene la forma apropiada, está formado con el material adecuado (acorde al material de base y la unión y se funde de manera fuerte y tenaz con el material de base. Las propiedades de la unión mencionada, dependen del alambre de la armadura y no de la soldadura. Se determina la forma más ventajosa de la armadura y se investigan las reacciones metalúrgicas entre el material de base, la soldadura y la armadura.

  16. Ionization probabilities of Ne, Ar, Kr, and Xe by proton impact for different initial states and impact energies

    Science.gov (United States)

    Montanari, C. C.; Miraglia, J. E.

    2017-09-01

    In this contribution we present ab initio results for ionization total cross sections, probabilities at zero impact parameter, and impact parameter moments of order +1 and -1 of Ne, Ar, Kr, and Xe by proton impact in an extended energy range from 100 keV up to 10 MeV. The calculations were performed by using the continuum distorted wave eikonal initial state approximation (CDW-EIS) for energies up to 1 MeV, and using the first Born approximation for larger energies. The convergence of the CDW-EIS to the first Born above 1 MeV is clear in the present results. Our inner-shell ionization cross sections are compared with the available experimental data and with the ECPSSR results. We also include in this contribution the values of the ionization probabilities at the origin, and the impact parameter dependence. These values have been employed in multiple ionization calculations showing very good description of the experimental data. Tables of the ionization probabilities are presented, disaggregated for the different initial bound states, considering all the shells for Ne and Ar, the M-N shells of Kr and the N-O shells of Xe.

  17. Towards scaling laws for subduction initiation on terrestrial planets: constraints from two-dimensional steady-state convection simulations

    Science.gov (United States)

    Wong, Teresa; Solomatov, Viatcheslav S.

    2015-12-01

    The strongly temperature-dependent viscosity of rocks leads to the formation of nearly rigid lithospheric plates. Previous studies showed that a very low yield stress might be necessary to weaken and mobilize the plates, for example, due to water. However, the magnitude of the yield stress remains poorly understood. While the convective stresses below the lithosphere are relatively small, sublithospheric convection can induce large stresses in the lithosphere indirectly, through thermal thinning of the lithosphere. The magnitude of the thermal thinning, the stresses associated with it, and the critical yield stress to initiate subduction depend on several factors including the viscosity law, the Rayleigh number, and the aspect ratio of the convective cells. We conduct a systematic numerical analysis of lithospheric stresses and other convective parameters for single steady-state convection cells. Such cells can be considered as part of a multi-cell, time-dependent convective system. This allows us a better control of convective solutions and a relatively simple scaling analysis. We find that subduction initiation depends much stronger on the aspect ratio than in previous studies and speculate that plate tectonics initiation may not necessarily require significant weakening and can, at least in principle, start if a sufficiently long cell develops during planetary evolution.

  18. Flow processes on the catchment scale - modeling of initial structural states and hydrological behavior in an artificial exemplary catchment

    Science.gov (United States)

    Maurer, Thomas; Caviedes-Voullième, Daniel; Hinz, Christoph; Gerke, Horst H.

    2017-04-01

    Landscapes that are heavily disturbed or newly formed by either natural processes or human activity are in a state of disequilibrium. Their initial development is thus characterized by highly dynamic processes under all climatic conditions. The primary distribution and structure of the solid phase (i.e. mineral particles forming the pore space) is one of the decisive factors for the development of hydrological behavior of the eco-hydrological system and therefore (co-) determining for its - more or less - stable final state. The artificially constructed ‚Hühnerwasser' catchment (a 6 ha area located in the open-cast lignite mine Welzow-Süd, southern Brandenburg, Germany) is a landscape laboratory where the initial eco-hydrological development is observed since 2005. The specific formation (or construction) processes generated characteristic sediment structures and distributions, resulting in a spatially heterogeneous initial state of the catchment. We developed a structure generator that simulates the characteristic distribution of the solid phase for such constructed landscapes. The program is able to generate quasi-realistic structures and sediment compositions on multiple spatial levels (1 cm up to 100 m scale). The generated structures can be i) conditioned to actual measurement values (e.g., soil texture and bulk distribution); ii) stochastically generated, and iii) calculated deterministically according to the geology and technical processes at the excavation site. Results are visualized using the GOCAD software package and the free software Paraview. Based on the 3D-spatial sediment distributions, effective hydraulic van-Genuchten parameters are calculated using pedotransfer functions. The hydraulic behavior of different sediment distribution (i.e. versions or variations of the catchment's porous body) is calculated using a numerical model developed by one of us (Caviedes-Voullième). Observation data are available from catchment monitoring are available

  19. Solid-state transformation of nanocrystalline phyllomanganate into tectomanganate: influence of initial layer and interlayer structure.

    Science.gov (United States)

    Grangeon, Sylvain; Lanson, Bruno; Lanson, Martine

    2014-10-01

    In surficial environments, the fate of many elements is influenced by their interactions with the phyllomanganate vernadite, a nano-sized and turbostratic variety of birnessite. To advance our understanding of the surface reactivity of vernadite as a function of pH, synthetic vernadite (δ-MnO2) was equilibrated at pH ranging from 3 to 10 and characterized structurally using chemical methods, thermogravimetry and modelling of powder X-ray diffraction (XRD) patterns. With decreasing pH, the number of vacant layer sites increases in the octahedral layers of δ-MnO2 (from 0.14 per layer octahedron at pH 10 to 0.17 at pH 3), whereas the number of layer Mn(3+) is, within errors, equal to 0.12 per layer octahedron over the whole pH range. Vacant layer sites are capped by interlayer Mn(3+) sorbed as triple corner-sharing surface complexes (TC sites). The increasing number of interlayer Mn(3+) with decreasing pH (from 0.075 per layer octahedron at pH 10 to 0.175 at pH 3) results in the decrease of the average Mn oxidation degree (from 3.80 ± 0.01 at pH 10 to 3.70 ± 0.01 at pH 3) and in the lowering of the Na/Mn ratio (from 27.66 ± 0.20 at pH 10 to 6.99 ± 0.16 at pH 3). In addition, in-plane unit-cell parameters are negatively correlated to the number of interlayer Mn at TC sites and decrease with decreasing pH (from b = 2.842 Å at pH 10 to b = 2.834 Å at pH 3), layer symmetry being systematically hexagonal with a = b × 3(1/2). Finally, modelling of X-ray diffraction (XRD) patterns indicates that crystallite size in the ab plane and along the c* axis decreases with decreasing pH, ranging respectively from 7 nm to 6 nm, and from 1.2 nm to 1.0 nm (pH 10 and 3, respectively). Following their characterization, dry samples were sealed in polystyrene vials, kept in the dark, and re-analysed 4 and 8 years later. With ageing time and despite the dry state, layer Mn(3+) extensively migrates to the interlayer most likely to minimize steric strains

  20. Initiation of a Marinoan Snowball Earth in a state-of-the-art atmosphere-ocean general circulation model

    Directory of Open Access Journals (Sweden)

    A. Voigt

    2011-03-01

    Full Text Available We study the initiation of a Marinoan Snowball Earth (~635 million years before present with the state-of-the-art atmosphere-ocean general circulation model ECHAM5/MPI-OM. This is the most sophisticated model ever applied to Snowball initiation. A comparison with a pre-industrial control climate shows that the change of surface boundary conditions from present-day to Marinoan, including a shift of continents to low latitudes, induces a global-mean cooling of 4.6 K. Two thirds of this cooling can be attributed to increased planetary albedo, the remaining one third to a weaker greenhouse effect. The Marinoan Snowball Earth bifurcation point for pre-industrial atmospheric carbon dioxide is between 95.5 and 96% of the present-day total solar irradiance (TSI, whereas a previous study with the same model found that it was between 91 and 94% for present-day surface boundary conditions. A Snowball Earth for TSI set to its Marinoan value (94% of the present-day TSI is prevented by doubling carbon dioxide with respect to its pre-industrial level. A zero-dimensional energy balance model is used to predict the Snowball Earth bifurcation point from only the equilibrium global-mean ocean potential temperature for present-day TSI. We do not find stable states with sea-ice cover above 55%, and land conditions are such that glaciers could not grow with sea-ice cover of 55%. Therefore, none of our simulations qualifies as a "slushball" solution. While uncertainties in important processes and parameters such as clouds and sea-ice albedo suggest that the Snowball Earth bifurcation point differs between climate models, our results contradict previous findings that Snowball Earth initiation would require much stronger forcings.

  1. Laser angle-resolved photoemission as a probe of initial state kz dispersion, final-state band gaps, and spin texture of Dirac states in the Bi2Te3 topological insulator

    Science.gov (United States)

    Ä; rrälä, Minna; Hafiz, Hasnain; Mou, Daixiang; Wu, Yun; Jiang, Rui; Riedemann, Trevor; Lograsso, Thomas A.; Barbiellini, Bernardo; Kaminski, Adam; Bansil, Arun; Lindroos, Matti

    2016-10-01

    We have obtained angle-resolved photoemission spectroscopy (ARPES) spectra from single crystals of the topological insulator material Bi2Te3 using a tunable laser spectrometer. The spectra were collected for 11 different photon energies ranging from 5.57 to 6.70 eV for incident light polarized linearly along two different in-plane directions. Parallel first-principles, fully relativistic computations of photointensities were carried out using the experimental geometry within the framework of the one-step model of photoemission. A reasonable overall accord between theory and experiment is used to gain insight into how properties of the initial- and final-state band structures as well as those of the topological surface states and their spin textures are reflected in the laser-ARPES spectra. Our analysis reveals that laser-ARPES is sensitive to both the initial-state kz dispersion and the presence of delicate gaps in the final-state electronic spectrum.

  2. Valorization of Automotive Shredder Residues in metallurgical furnaces

    OpenAIRE

    Guignot, Sylvain; Menad, Noureddine; Diot, F.; Kanari, N.; Save, Maurice; Wavrer, Philippe; Bodénan, Françoise; Thomas, Fabien; Silvente, Eric; Lecler, Marie-Thérèse; Quatravaux, Thibault; Philippe, Russo; Kleihauser, Jens; Buffoni, Corinne

    2011-01-01

    Poster présenté au congrès Euromat 2011; International audience; According to the directive n°2000/53/CE 85 % by weight of an end-of-life vehicle (EVL) must be recycled. The current state of practice comprises four steps. Liquids from battery, gearboxes casing, brake fluid, coolant and air conditioning circuit are first collected. Tyres, catalysts, windscreens and windows are then manually removed, prior to the shredding of the car. A magnetic separation is processed on the shredded materials...

  3. Valorization of Automotive Shredder Residues in metallurgical furnaces

    OpenAIRE

    Guignot, Sylvain; Menad, Noureddine; Diot, F.; Kanari, N.; Save, Maurice; Wavrer, Philippe; Bodénan, Françoise; Thomas, Fabien; Silvente, Eric; Lecler, Marie-Thérèse; Quatravaux, Thibault; Philippe, Russo; Kleihauser, Jens; Buffoni, Corinne

    2011-01-01

    Poster présenté au congrès Euromat 2011; International audience; According to the directive n°2000/53/CE 85 % by weight of an end-of-life vehicle (EVL) must be recycled. The current state of practice comprises four steps. Liquids from battery, gearboxes casing, brake fluid, coolant and air conditioning circuit are first collected. Tyres, catalysts, windscreens and windows are then manually removed, prior to the shredding of the car. A magnetic separation is processed on the shredded materials...

  4. Importance of Performance Measurement and MCH Epidemiology Leadership to Quality Improvement Initiatives at the National, State and Local Levels.

    Science.gov (United States)

    Rankin, Kristin M; Gavin, Loretta; Moran, John W; Kroelinger, Charlan D; Vladutiu, Catherine J; Goodman, David A; Sappenfield, William M

    2016-11-01

    Purpose In recognition of the importance of performance measurement and MCH epidemiology leadership to quality improvement (QI) efforts, a plenary session dedicated to this topic was presented at the 2014 CityMatCH Leadership and MCH Epidemiology Conference. This paper summarizes the session and provides two applications of performance measurement to QI in MCH. Description Performance measures addressing processes of care are ubiquitous in the current health system landscape and the MCH community is increasingly applying QI processes, such as Plan-Do-Study-Act (PDSA) cycles, to improve the effectiveness and efficiency of systems impacting MCH populations. QI is maximally effective when well-defined performance measures are used to monitor change. Assessment MCH epidemiologists provide leadership to QI initiatives by identifying population-based outcomes that would benefit from QI, defining and implementing performance measures, assessing and improving data quality and timeliness, reporting variability in measures throughout PDSA cycles, evaluating QI initiative impact, and translating findings to stakeholders. MCH epidemiologists can also ensure that QI initiatives are aligned with MCH priorities at the local, state and federal levels. Two examples of this work, one highlighting use of a contraceptive service performance measure and another describing QI for peripartum hemorrhage prevention, demonstrate MCH epidemiologists' contributions throughout. Challenges remain in applying QI to complex community and systems-level interventions, including those aimed at improving access to quality care. Conclusion MCH epidemiologists provide leadership to QI initiatives by ensuring they are data-informed and supportive of a common MCH agenda, thereby optimizing the potential to improve MCH outcomes.

  5. On the modelling of steel thermo-mechanical and metallurgical behaviour. Application to welding and heat treatment process; Sur la modelisation du comportement thermomecanique et metallurgique des aciers. Application au procede de soudage et de traitements thermiques

    Energy Technology Data Exchange (ETDEWEB)

    Trinh, N.T

    2008-06-15

    The aim of this research is the prediction of residual stresses and strains in submarine nuclear reactor vessels after a welding operation. In the first part, the author briefly describes the various welding processes, their thermal, metallurgical and mechanical consequences, and gives an overview of the state-of-the-art of computerized modelling of welding. Then, he gives a detailed description of the various proposed models of the thermo-mechanical and metallurgical behaviours of steels. The influence of different phenomena such as plasticity, visco-plasticity, and transformation induced plasticity on the mechanical behaviour of the blend is analysed according to a sequential approach: the behaviour of each metallurgical phase is elastoplastic with linear kinetic cold working, then elasto-viscoplastic. A combined model is presented in which the ferrite phase behaviour is elastoplastic and the austenite behaviour is elasto-viscoplastic. The proposed models are then validated by two computer simulations performed with the COMSOL Multiphysics code. These simulations are simulating two tests which are representative of the phenomena met during a welding operation.

  6. Exclusive Production of Ds Ds-, Ds* Ds-, and Ds* Ds*- via e e- Annihilation with Initial-State-Radiation

    Energy Technology Data Exchange (ETDEWEB)

    del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Martinelli, M.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Battaglia, M.; Brown, D.N.; Hooberman, B.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; Tanabe, T.; /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UC, Riverside /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Indian Inst. Tech., Guwahati /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa State U. /Iowa State U. /Johns Hopkins U. /Paris U., VI-VII /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /INFN, Naples /Naples U. /NIKHEF, Amsterdam /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /Rostock U. /Rutherford /DAPNIA, Saclay /SLAC /South Carolina U. /Southern Methodist U. /Stanford U., Phys. Dept. /SUNY, Albany /Tel Aviv U. /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U. /Victoria U. /Warwick U. /Wisconsin U., Madison

    2010-10-27

    The authors perform a study of exclusive production of D{sub s}{sup +}D{sub s}{sup -}, D*{sub s}{sup +}D{sub s}{sup -}, and D*{sub s}{sup +}D*{sub s}{sup -} final states in initial-state-radiation events from e{sup +}e{sup -} annihilations at a center-of-mass energy near 10.58 GeV, to search for charmonium 1{sup --} states. The data sample corresponds to an integrated luminosity of 525 fb{sup -1} and was recorded by the BABAR experiment at the PEP-II storage ring. The D{sub s}{sup +} D{sub s}{sup -}, D*{sub s}{sup +}D{sub s}{sup -}, and D*{sub s}{sup +}D*{sub s}{sup -} mass spectra show evidence of the known {psi} resonances. Limits are extracted for the branching ratios of the decays X(4260) {yields} D{sub s}{sup (*)+}D{sub s}{sup (*)-}.

  7. Fundamental structural characteristics of planar granular assemblies: Self-organization and scaling away friction and initial state

    Science.gov (United States)

    Matsushima, Takashi; Blumenfeld, Raphael

    2017-03-01

    The microstructural organization of a granular system is the most important determinant of its macroscopic behavior. Here we identify the fundamental factors that determine the statistics of such microstructures, using numerical experiments to gain a general understanding. The experiments consist of preparing and compacting isotropically two-dimensional granular assemblies of polydisperse frictional disks and analyzing the emergent statistical properties of quadrons—the basic structural elements of granular solids. The focus on quadrons is because the statistics of their volumes have been found to display intriguing universal-like features [T. Matsushima and R. Blumenfeld, Phys. Rev. Lett. 112, 098003 (2014), 10.1103/PhysRevLett.112.098003]. The dependence of the structures and of the packing fraction on the intergranular friction and the initial state is analyzed, and a number of significant results are found. (i) An analytical formula is derived for the mean quadron volume in terms of three macroscopic quantities: the mean coordination number, the packing fraction, and the rattlers fraction. (ii) We derive a unique, initial-state-independent relation between the mean coordination number and the rattler-free packing fraction. The relation is supported numerically for a range of different systems. (iii) We collapse the quadron volume distributions from all systems onto one curve, and we verify that they all have an exponential tail. (iv) The nature of the quadron volume distribution is investigated by decomposition into conditional distributions of volumes given the cell order, and we find that each of these also collapses onto a single curve. (v) We find that the mean quadron volume decreases with increasing intergranular friction coefficients, an effect that is prominent in high-order cells. We argue that this phenomenon is due to an increased probability of stable irregularly shaped cells, and we test this using a herewith developed free cell analytical model

  8. Resistance Upset Welding of ODS Steel Fuel Claddings—Evaluation of a Process Parameter Range Based on Metallurgical Observations

    Directory of Open Access Journals (Sweden)

    Fabien Corpace

    2017-08-01

    Full Text Available Resistance upset welding is successfully applied to Oxide Dispersion Strengthened (ODS steel fuel cladding. Due to the strong correlation between the mechanical properties and the microstructure of the ODS steel, this study focuses on the consequences of the welding process on the metallurgical state of the PM2000 ODS steel. A range of process parameters is identified to achieve operative welding. Characterizations of the microstructure are correlated to measurements recorded during the welding process. The thinness of the clad is responsible for a thermal unbalance, leading to a higher temperature reached. Its deformation is important and may lead to a lack of joining between the faying surfaces located on the outer part of the join which can be avoided by increasing the dissipated energy or by limiting the clad stick-out. The deformation and the temperature reached trigger a recrystallization phenomenon in the welded area, usually combined with a modification of the yttrium dispersion, i.e., oxide dispersion, which can damage the long-life resistance of the fuel cladding. The process parameters are optimized to limit the deformation of the clad, preventing the compactness defect and the modification of the nanoscale oxide dispersion.

  9. From Coin to Medal: A Metallurgical Study of the Brazing Drop on a 19th Century Scudo

    Science.gov (United States)

    Breda, M.; Canovaro, C.; Pérez, A. F. Miranda; Calliari, I.

    2012-11-01

    In the past, it was customary to use out-of-circulation coins as pendants by brazing a peg or ring on the edge of the coin in order to transform it into a devotional or decorative object; this practice was very common for specimens of the Papal States, especially for silver coins. This metallurgical investigation of a 19th century Scudo aimed to relate the internal structure of the coin to the minting technology with a special focus on the brazing drop, in order to provide information on the solidification microstructure arising from a strongly nonequilibrium process such as brazing. The results show that the Ag content in the coin ranges from 92% in the bulk up to 97% on the surface, due to enrichment, while analysis of the brazing revealed that it consists of an Ag-Cu-Zn-Pb alloy, for which the melting temperature has been estimated. Considering the distribution of minor elements, Zn segregates in the secondary (Cu-rich) β-dendrites and inside the whole eutectic structure, while Pb is only present in the Ag-based phases and seems to reduce the solubility of Zn inside the primary (Ag-rich) α-dendrites.

  10. Effects of Pack Rolling Temperature on Microstructure and Mechanical Properties of Powder Metallurgical Ti-45Al-7Nb-0.3W Alloy

    Science.gov (United States)

    Li, Huizhong; Qi, Yelong; Liang, Xiaopeng; Wang, Zijun; Sang, Fengjian; Liu, Yong

    2017-08-01

    Powder metallurgical Ti-45Al-7Nb-0.3W (at.%) alloys were pack rolled at temperatures of 1240°C, 1255°C, 1270°C, and 1285°C. The microstructures were investigated by scanning electron microscopy (SEM) and transmission electron microscopy. The tensile properties were tested at room temperature and 800°C. After rolling, the sheets exhibited duplex microstructures with refined grains. The tensile test results showed the sheet rolled at 1270°C displayed excellent room temperature tensile properties with an ultimate tensile strength (UTS) of 782 MPa and an elongation of 1.95%. When tested at 800°C, all sheets showed UTS of over 600 MPa and elongations of around 50%. The dislocation movements and mechanical twinning played important roles at the initial stage of rolling deformation. However, during the subsequent deformation process, the deformation mechanism should mainly be the result of dynamic recrystallization.

  11. Observation of $\\psi(4415)\\to D \\bar D{}^{*}_2(2460)$ decay using initial-state radiation

    CERN Document Server

    Pakhlova, G; Aihara, H; Arinstein, K; Aulchenko, V; Aushev, T; Bakich, A M; Balagura, V; Barberio, E; Bedny, I; Belous, K S; Bitenc, U; Bondar, A; Bracko, M; Brodzicka, J; Browder, T E; Chen, A; Chen, W T; Cheon, B G; Chiang, C C; Chistov, R; Cho, I S; Choi, Y; Dalseno, J; Danilov, M; Dash, M; Drutskoy, A; Eidelman, S; Epifanov, D; Gabyshev, N; Golob, B; Ha, H; Haba, J; Hayasaka, K; Hazumi, M; Heffernan, D; Hoshi, Y; Hou, W S; Hsiung, Y B; Hyun, H J; Inami, K; Ishikawa, A; Ishino, H; Itoh, R; Iwasaki, M; Iwasaki, Y; Joshi, N J; Kah, D H; Kang, J H; Kawasaki, T; Kibayashi, A; Kichimi, H; Kim, H J; Kim, H O; Kim, Y J; Kinoshita, K; Korpar, S; Krizan, P; Krokovny, P; Kumar, R; Kuo, C C; Kuzmin, A; Kwon, Y J; Lange, J S; Lee, M J; Lee, S E; Lesiak, T; Lin, S W; Liventsev, D; Mandl, F; Marlow, D; McOnie, S; Medvedeva, T; Miyake, H; Mizuk, R; Mohapatra, D; Moloney, G R; Nagasaka, Y; Nakano, E; Nakao, M; Nakazawa, H; Nishida, S; Nitoh, O; Ogawa, S; Ohshima, T; Okuno, S; Olsen, S L; Ozaki, H; Pakhlov, P; Park, H; Park, K S; Peak, L S; Pestotnik, R; Piilonen, L E; Poluektov, A; Sakai, Y; Schneider, O; Schwanda, C; Senyo, K; Shapkin, M; Shen, C P; Shibuya, H; Shiu, J G; Shwartz, B; Singh, J B; Somov, A; Stanic, S; Sumiyoshi, T; Takasaki, F; Tamai, K; Tanaka, M; Taylor, G N; Teramoto, Y; Tikhomirov, I; Uehara, S; Ueno, K; Uglov, T; Unno, Y; Uno, S; Usov, Yu; Varner, G; Vinokurova, A; Wang, C H; Wang, M Z; Wang, P; Wang, X L; Watanabe, Y; Won, E; Yabsley, B D; Yamaguchi, A; Yamashita, Y; Yamauchi, M; Yuan, C Z; Zhang, C C; Zhang, L M; Zhang, Z P; Zhilich, V; Zhulanov, V; Zupanc, A

    2007-01-01

    We report the first observation of the $\\psi(4415)$ resonance in the reaction $\\e^+e^-\\to D^0 D^-\\pi^+$ and a measurement of its cross section in the center-of-mass energy range $4.0\\mathrm{GeV}$ to $5.0\\mathrm{GeV}$ with initial state radiation. From a study of resonant structure in $\\psi(4415)$ decay we conclude that the $\\psi(4415)\\to D^0 D^-\\pi^+$ decay is dominated by $\\psi(4415)\\to D \\bar D{}^{*}_2(2460)$. We obtain $\\mathcal{B}(\\psi(4415)\\to D^0 D^-\\pi^+_{\\mathrm {non-resonant}})/\\mathcal{B}(\\psi(4415)\\to D \\bar D{}^{*}_2(2460)\\to D^0 D^-\\pi^+)<0.22$ at 90% C.L. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of 673 $\\mathrm{fb}^{-1}$.

  12. Exclusive Initial-State-Radiation Production of the DDbar,D*Dbar, and D*D*bar Systems

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, B.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E.; Prudent, X.; Tisserand, V.; /Annecy, LAPP; Garra Tico, J.; Grauges, E.; /Barcelona U., ECM; Lopez, L.; Palano, A.; Pappagallo, M.; /INFN, Bari /Bari U.; Eigen, G.; Stugu, B.; Sun, L.; /Bergen U.; Battaglia, M.; Brown, D.N.; Kerth, L.T.; Kolomensky, Yu.G.; Lynch, G.; Osipenkov, I.L.; /LBL, Berkeley /UC, Berkeley /Birmingham U. /Ruhr U., Bochum /British Columbia U. /Brunel U. /Novosibirsk, IYF /UC, Irvine /UCLA /UC, Riverside /UC, San Diego /UC, Santa Barbara /UC, Santa Cruz /Caltech /Cincinnati U. /Colorado U. /Colorado State U. /Dortmund U. /Dresden, Tech. U. /Ecole Polytechnique /Edinburgh U. /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /INFN, Ferrara /INFN, Ferrara /Ferrara U. /Frascati /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /INFN, Genoa /INFN, Genoa /Genoa U. /Harvard U. /Heidelberg U. /Humboldt U., Berlin /Imperial Coll., London /Iowa U. /Iowa State U. /Johns Hopkins U. /Orsay, LAL /LLNL, Livermore /Liverpool U. /Queen Mary, U. of London /Royal Holloway, U. of London /Louisville U. /Mainz U., Inst. Kernphys. /Manchester U. /Maryland U. /Massachusetts U., Amherst /MIT, LNS /McGill U. /INFN, Milan /Milan U. /INFN, Milan /INFN, Milan /Milan U. /Mississippi U. /Montreal U. /Mt. Holyoke Coll. /INFN, Naples /Naples U. /INFN, Naples /INFN, Naples /Naples U. /NIKHEF, Amsterdam /Notre Dame U. /Ohio State U. /Oregon U. /INFN, Padua /Padua U. /INFN, Padua /INFN, Padua /Padua U. /Paris U., VI-VII /Pennsylvania U. /INFN, Perugia /Perugia U. /INFN, Pisa /Pisa U. /INFN, Pisa /Pisa, Scuola Normale Superiore /INFN, Pisa /Pisa U. /INFN, Pisa /Princeton U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /INFN, Rome /Rome U. /INFN, Rome /Rostock U. /Rutherford /DSM, DAPNIA, Saclay /South Carolina U. /SLAC /Stanford U., Phys. Dept. /SUNY, Albany /Tennessee U. /Texas U. /Texas U., Dallas /INFN, Turin /Turin U. /INFN, Trieste /Trieste U. /Valencia U., IFIC /Victoria U. /Warwick U. /Wisconsin U., Madison

    2009-06-19

    We perform a study of the exclusive production of D{bar D}, D*{bar D}, and D*{bar D}* in initial-state-radiation events, from e{sup +}e{sup -} annihilations at a center-of-mass energy near 10.58 GeV, to search for charmonium and possible new resonances. The data sample corresponds to an integrated luminosity of 384 fb{sup -1} and was recorded by the BABAR experiment at the PEP-II storage rings. The D{bar D}, D*{bar D}, and D*{bar D}* mass spectra show clear evidence of several {psi} resonances. However, there is no evidence for Y(4260) {yields} D*{bar D} or Y(4260) {yields} D*{bar D}*.

  13. On Baryon-Antibaryon Cross Sections from Initial State Radiation Processes at BABAR and their Surprising Threshold Behavior

    Energy Technology Data Exchange (ETDEWEB)

    Pacetti, Simone [Enrico Fermi Center, Rome (Italy); National Inst. of Nuclear Physics (INFN), Frascati (Italy). National Lab. of Frascati (INFN-LFN). et al.

    2015-04-14

    BABAR has measured with unprecedented accuracy the e+e- → pp-bar and e+e- → ΛΛ-bar cross sections by means of the initial state radiation technique, which has the advantages of good efficiency and energy resolution, and full angular acceptance in the threshold region. A striking feature of these cross sections is their non-vanishing values at threshold. In the case of charged baryons, the phenomenon is well understood in terms of the Coulomb interaction between the outgoing baryon and antibaryon. However, such an effect is not expected for neutral baryons. We suggest a simple explanation for both charged and neutral baryon pairs based on Coulomb interactions at the valence quark level.

  14. Integrated waste and water management in mining and metallurgical industries

    Institute of Scientific and Technical Information of China (English)

    B.K.C.CHAN; S.BOUZALAKOS; A.W.L.DUDENEY

    2008-01-01

    Extractive operations usually co-produce large quantities of unmarketable materials (mineral wastes),most of which are conventionally discarded to dumps (coarse material) and tailings ponds (fines).Escalating cost and regulation worldwide highlight an increasing need for reduction and re-use of such wastes.The present paper introduces a new integrated waste management scheme for solids and water.The scheme was exemplified by novel treatment of synthetic waste and process water linked to the biohydrometallurgical processing of metal sulphide flotation concentrates.Bioleaching of sulphide concentrate leads to two types of solid waste:a ferrihydrite/gypsum precipitate from neutralisation of the bioleach liquor and un-leached gangue.The paper indicates that,depending upon the minor components involved,the solid phases in admixture might be usefully distributed among three types of product:conventional underground backfill,cemented civil engineering backfill (particularly controlled low strength material or CLSM) and manufactured soil.It emphasizes CLSM containing simulated mineral waste,showing that such material can exhibit the required characteristics of strength,porosity and permeability.When toxic components,e.g.,arsenic from refractory gold ore,are present,encapsulation will be required.Process water is typically recycled as far as possible,although any excess should be treated before re-use or discharge.The paper also highlights treatment by reverse osmosis (one of the few methods able to generally remove dissolved components),particularly showing that arsenic in oxidation state +6 can be readily removed for discharge (<50×10-12 As),although additional ion exchange is needed for potable water (<10×10-12 As).

  15. Non-Linear Trans-Planckian Corrections of Spectra due to the Non-trivial Initial States

    CERN Document Server

    Yusofi, E

    2014-01-01

    Recent Planck results motivated us to use non-Bunch-Davies vacuum. In this paper, we use the excited-de Sitter mode as non-linear initial states during inflation to calculate the corrected spectra of the initial fluctuations of the scalar field. First, we consider the field in de Sitter space-time as background field and for the non-Bunch-Davies mode, we use the perturbation theory to the second order approximation. Also, unlike conventional renormalization method, we offer de Sitter space-time as the background instead Minkowski space-time. This approach preserve the symmetry of curved space-time and stimulate us to use excited mode. By taking into account this alternative mode and the effects of trans-Planckian physics, we calculate the power spectrum in standard approach and Danielsson argument. The calculated power spectrum with this method is finite, corrections of it is non-linear, and in de Sitter limit corrections reduce to linear form that obtained from several previous conventional methods.

  16. Fast determination of impurities in metallurgical grade silicon for photovoltaics by instrumental neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Hampel, J., E-mail: jonathan.hampel@ise.fraunhofer.de [Fraunhofer Institute for Solar Energy Systems, Heidenhofstrasse 2, D-79110 Freiburg (Germany); Boldt, F.M. [Fraunhofer Institute for Solar Energy Systems, Heidenhofstrasse 2, D-79110 Freiburg (Germany); Gerstenberg, H. [ZWE FRM-II der Technischen Universitaet Muenchen, D-85748 Garching (Germany); Hampel, G.; Kratz, J.V. [Institute of Nuclear Chemistry, Johannes Gutenberg-University of Mainz, Fritz-Strassmann-Weg 2, D-55128 Mainz (Germany); Reber, S. [Fraunhofer Institute for Solar Energy Systems, Heidenhofstrasse 2, D-79110 Freiburg (Germany); Wiehl, N. [Institute of Nuclear Chemistry, Johannes Gutenberg-University of Mainz, Fritz-Strassmann-Weg 2, D-55128 Mainz (Germany)

    2011-10-15

    Standard wafer solar cells are made of near-semiconductor quality silicon. This high quality material makes up a significant part of the total costs of a solar module. Therefore, new concepts with less expensive so called solar grade silicon directly based on physiochemically upgraded metallurgical grade silicon are investigated. Metallurgical grade silicon contains large amounts of impurities, mainly transition metals like Fe, Cr, Mn, and Co, which degrade the minority carrier lifetime and thus the solar cell efficiency. A major reduction of the transition metal content occurs during the unidirectional crystallization due to the low segregation coefficient between the solid and liquid phase. A further reduction of the impurity level has to be done by gettering procedures applied to the silicon wafers. The efficiency of such cleaning procedures of metallurgical grade silicon is studied by instrumental neutron activation analysis (INAA). Small sized silicon wafers of approximately 200 mg with and without gettering step were analyzed. To accelerate the detection of transition metals in a crystallized silicon ingot, experiments of scanning whole vertical silicon columns with a diameter of approximately 1 cm by gamma spectroscopy were carried out. It was demonstrated that impurity profiles can be obtained in a comparably short time. Relatively constant transition metal ratios were found throughout an entire silicon ingot. This led to the conclusion that the determination of several metal profiles might be possible by the detection of only one 'leading element'. As the determination of Mn in silicon can be done quite fast compared to elements like Fe, Cr, and Co, it could be used as a rough marker for the overall metal concentration level. Thus, a fast way to determine impurities in photovoltaic silicon material is demonstrated. - Highlights: > We demonstrate a fast way to determine impurities in photovoltaic silicon by NAA. > We make first experiments of

  17. Applications of computational fluid dynamics in optimisation and design of metallurgical processes

    Directory of Open Access Journals (Sweden)

    Stein T. Johansen

    1997-04-01

    Full Text Available During the last two decades computational fluid dynamics (CFD has become a powerful tool for analysing and designing metallurgical processes. In this paper we give examples on how these techniques can be applied to a large variety of processes and also how CFD can be used to predict heat and mass transfer from fundamental principles. The paper is restricted to the applications of CFD at SINTEF Materials Technology. The examples given in the paper will range from treatment of raw materials, environmental issues, furnace processes and combustion, magnetohydrodynamics, melt treatment to casting.

  18. Influence of material and gear parameters on the safety of gearing in metallurgical industry

    Directory of Open Access Journals (Sweden)

    S. Medvecká - Beňová

    2015-01-01

    Full Text Available This paper deals with the appropriate choice of parameters to obtain the desired level of safety of gears in a gearbox to drive the conveyor in the metallurgical industry under increased load. Steel with surface hardness up to 350 HBW, or heat treated steel with hardness of 500 - 650 HBW are used. As a final heat treatment are used surface hardening, cementation and hardening, nitridation. Good properties of heat-treated steels are at the correct thickness of the heat-treated layer of the tooth. Results are presented for dual-ratio gearbox with spur gears from operation of an integrated steel company.

  19. Powder metallurgical processing of magnetostrictive materials based on rare earth-iron intermetallic compounds

    Energy Technology Data Exchange (ETDEWEB)

    Malekzadeh, M.

    1978-01-01

    Procedures are described for fabrication of high density rare earth-iron magnetostrictive compounds by powder metallurgical techniques. The fabrication involves a sequence of steps which includes preparing the pre-alloyed compounds, pulverizing them into a fine powder, compacting in suitable sizes and shapes, and sintering. Samples prepared by these procedures are carefully characterized by scanning electron microscopy, x-ray diffraction, dilatometry, and magnetic measurements. Process steps are found to exert important influences upon densities, microstructure and magnetic properties attained after densification. Investigations on a number of these process steps, including milling time and medium, sintering, and magnetic powder alignment are described.

  20. Metallurgical Characterization of the Interfaces and the Damping Mechanisms in Metal Matrix Composites.

    Science.gov (United States)

    2014-09-26

    intrinsic damping behavior needs to be clearly understood and improved if necessary, through metallurgical modifications . In the presnt--tw 4 aa, a graphite...34" * (iv) Recommend microstructural modific ,-..ions to enhance damping in metal matrix composites. - - 4.0 TECHNICAL APPROACH 4.1 Specimen Design A...0.038"xl/0"x4.9 S ecimen; 0.011 Face Sheet Thickness ** Damping Factor _=Ap~g ( log d ec reme n t)L1% ’~A" *1% 5.2.1 Composite Panels (A) Pitch 55 Gr

  1. Behavioural determinants of work accidents and absenteeism in a metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    B. Gajdzik

    2015-10-01

    Full Text Available The purpose of this study is to offer an interpretation of the relationship between accidents and employee absenteeism in terms of quantitative (statistical data on accidents and absenteeism and qualitative (study of employee attitudes evaluation. It has been assumed that the description using the results obtained from one group only is incomplete, because the rate of accidents is affected by the attitude of the staff, and in describing the behaviour of employees, the indicators of quality play an important role. The growing popularity of studies on employee behaviour results from the growing importance of human resources in companies. A metallurgical enterprise was selected for the case study.

  2. Metallurgical Laboratory Hazardous Waste Management Facility groundwater monitoring report: Third quarter 1993

    Energy Technology Data Exchange (ETDEWEB)

    1993-12-01

    During third quarter 1993, samples from AMB groundwater monitoring wells at the Metallurgical Laboratory Hazardous Waste Management Facility were analyzed for certain heavy metals, indicator parameters, radionuclides, volatile organic compounds, and other constituents. Eight parameters exceeded standards during the quarter. As in previous quarters, tetrachloroethylene and trichloroethylene exceeded final Primary Drinking Water Standards; and aluminum, iron, lead, manganese, pH, and total organic halogens exceeded the Savannah River Site Flag 2 criteria in one or more of the wells. Groundwater flow direction and rate in the water-table unit were similar to previous quarters.

  3. Future Resources for Eco-building Materials: I.Metallurgical Slag

    Institute of Scientific and Technical Information of China (English)

    XU Delong; LI Hui

    2009-01-01

    In order to make an effectivily recycle use of iron and steel slags that are main industrial wastes generated in Chinese metallurgical industry,the current technologies for reprocessing and recycling these wastes into eco-building materials were reviewed,such as preparing cement-steel slag blended cement with steel slag after metal recovery,using the fine powder of blast furnace slag (BFS)for manufacturing slag cement and high performance concrete.A further research on using these available resources more efficiently were discussed.

  4. Seed production of woody plants in conditions of environment pollution by metallurgical industry emissions

    Directory of Open Access Journals (Sweden)

    Z. V. Gritzay

    2011-10-01

    Full Text Available The influence of environment pollution by metallurgical industry emissions on woody plants bearing parameters was examined. The results obtained show the decrease of bearing rate, diminution of seeds, fruits and seed cells sizes in woody plants affected by technogenic emissions. Attenuation of the 1000 seeds’ weight was established. Incresing the amount of fruits with development deviations was ascertained. It was found aplasia and abnormal form of the samara fruit of ash and ailanthus trees, arcuation and narrowing of some parts of the catalpa fruitcases. Practical recommendations on using seeds’ sensitive parameters in biomonitoring of woody phytocenoses under technogenic stressful conditions are proposed.

  5. Reviews of Metallurgical Technology to Recovery Platinum Group Metals from Secondary Resource in China

    Institute of Scientific and Technical Information of China (English)

    GUO Junmei; HE Xiaotang; WANG Huan; WU Xilong; ZHAO Yu; LI Yong; LI Kun; HAN Shouli

    2012-01-01

    China is extremely poor in mineral resources of Platinum Group Metals (PGMs),productive output of PGMs from mineral resource is 2.5 tons per year.At the same time,China is the biggest PGMs consumption country in the world,the mineral resource of PGMs is critical shortage,it shows the importance of recycling the secondary resource of PGMs.Sino-Platinum Metals Resource (Yimen) Co.,Ltd.is the leader in recycling of PGMs from secondary resource,and has made outstanding contributions to China PGMs secondary resources recycling.This article elucidates the current situation of secondary resources recovery and development of metallurgical technology for PGMs.

  6. [Preparation of Copper and Nickel from Metallurgical Waste Products with the Use of Acidophilic Chemolithotrophic Microorganisms].

    Science.gov (United States)

    Fomchenko, N V; Murav'ev, M I

    2015-01-01

    The study concerns the leaching of copper, nickel, and cobalt from metallurgical production slag with trivalent iron sulphates prepared in the process of oxidation of bivalent iron ions with the use of associations of acidophilic chemolithotrophic microorganisms. At the same time, copper extraction in the solution reached 91.2%, nickel reached 74.9%, and cobalt reached 90.1%. Copper was extracted by cementation, and nickel as sulphate was extracted by electrolysis. Associations of microorganisms can then completely bioregenerate the solution obtained after leaching.

  7. The nature and types of network relations in distribution of metallurgical products

    Directory of Open Access Journals (Sweden)

    2010-12-01

    Full Text Available The article analyses the motives for establishing cooperation within a company supply network as division points in a supplies chain of metallurgical products. The division points were defined and identified at the level of service centres in the investigated chain. The analysis took into consideration various types of inter-organisational bonds, which are placed in the network relations classification matrix. The study concerns a complex distribution system. The analysed distribution network combines flows characteristic for both flexible and narrow supply chains.

  8. Metallurgical investigation of the Egyptian Research Reactor-1 (ET-RR-1) fuel casing aluminium alloy

    Energy Technology Data Exchange (ETDEWEB)

    Taha, A.S. (Atomic Energy Authority, Cairo (Egypt)); Soliman, S.E. (Atomic Energy Authority, Cairo (Egypt)); Hammad, F.H. (Atomic Energy Authority, Cairo (Egypt))

    1994-03-01

    The mechanical and metallurgical properties of the ET-RR-1 fuel casing (assembly) material were investigated since there are no available data about this material. Samples were taken from the top and the middle of the casing; the samples were then heat-treated at different conditions. The mechanical properties of the as-received and heat-treated samples were compared. Scanning electron microscopy (SEM) was used to investigate the microstructure of the tested samples and the fracture surface of the tensile specimens. All samples showed ductile fracture. Details of the results and the discussions are reported. (orig.)

  9. Metallurgical investigation of the Egyptian Research Reactor-1 (ET-RR-1) fuel casing aluminium alloy

    Science.gov (United States)

    Taha, A. S.; Soliman, S. E.; Hammad, F. H.

    1994-03-01

    The mechanical and metallurgical properties of the ET-RR-1 fuel casing (assembly) material were investigated since there are no available data about this material. Samples were taken from the top and the middle of the casing; the samples were then heat-treated at different conditions. The mechanical properties of the as-received and heat-treated samples were compared. Scanning electron microscopy (SEM) was used to investigate the microstructure of the tested samples and the fracture surface of the tensile specimens. All samples showed ductile fracture. Details of the results and the discussions are reported.

  10. Effective recruitment method for the marketing department of a metallurgical enterprise

    Directory of Open Access Journals (Sweden)

    E. Jaba

    2014-04-01

    Full Text Available This paper presents some solutions to recruit staff for the Marketing Department of a metallurgical enterprise. Our goal is to present the psychological characteristics of a certain category of employees on a sample of 107 employees and to evaluate the relationship between the motivation to work and those characteristics. In order to realize such evaluation we used the linear mixed effects model in the statistical software program R. The results showed that a significant effect on work motivation have factors like work climate and the employee agreeability.

  11. ON DEVELOPMENT OF OPTIMAL METALLURGICAL PROCESS FOR PREPARATION OF A NEW GENERATION OF INTERMETALLIC ALLOYS

    Directory of Open Access Journals (Sweden)

    Viliam Hrnčiar

    2009-06-01

    Full Text Available Intermetallic TiAl based alloys are used in extreme conditions, e.g. high temperature, aggressive atmosphere and combined high temperature mechanical loading. The contribution deals with development and optimization of plasma melting metallurgical process in new developed crystallizer with rotational and axial movement of melt, for preparation of new intermetallic alloys based on Ti-(45-48Al-(1-10Ta (at.%. The melting process parameters and their influence to final microstructure and properties of alloys are discussed. The aim of this work is to produce alloys with lower number of technological steps necessary to achieve chemical composition, homogeneity and purity as well.

  12. Competing feedbacks drive state transitions during initial catchment evolution: Examples from post-mining landscape and ecosystems evolution

    Science.gov (United States)

    Hinz, Christoph; Wolfgang, Schaaf; Werner, Gerwin

    2014-05-01

    Within the context of severely disturbed landscapes with little or no ecological memory, such as post-mining landscapes, we propose a simple framework that explains the catchment evolution as a result of competing feedbacks influenced by the initial conditions and the atmospheric drivers such as rainfall intermittency and intensity. The first stage of the evolution is dominated by abiotic feedbacks triggered by rainfall and subsequent fluid flow causing particle mobilisation on the surface and in the subsurface leading to flow concentration or in some instances to densification of surface and subsurface substrates. Subsequently, abiotic-biotic feedbacks start to compete in the sense that biological activity generally stabilizes substrate by preventing particle mobilisation and hence contribute to converting the substrate to a habitat. We suggest that these competing feedbacks may generate alternative stable states in particular under semi-arid and arid climatic conditions, while in temperate often energy limited environments biological process "outcompete" abiotic processes leading to a stable state, in particular from the water balance point of view for comparable geomorphic situations. To illustrate this framework, we provide examples from post-mining landscapes, in which soil, water and vegetation was monitored. In case of arid regions in Australia, we provide evidence that the initial conditions of a mine waste disposal "locked" the system into a state that was limited by water and nutrient storage capacity while at the same time it was stable from a geomorphic point of view for the observation period. The cause of the system to be locked in, is the very high hydraulic conductivity of the substrate, that has not undergone any changes during the first years. In contrast to this case study, we illustrate how this framework explains the evolution of an artificial catchment (Hühnerwasser Catchment) in Lusatia (150 km southeast of Berlin, Germany). During the

  13. Initiation of a Marinoan Snowball Earth in a state-of-the-art atmosphere-ocean general circulation model

    Directory of Open Access Journals (Sweden)

    A. Voigt

    2010-09-01

    Full Text Available We study the initiation of a Marinoan Snowball Earth (635 million years before present with the most sophisticated atmosphere-ocean general circulation model ever used for this purpose, ECHAM5/MPI-OM. A comparison with a pre-industrial control climate shows that the change of surface boundary conditions from present-day to Marinoan, including a shift of continents to low latitudes, induces a global mean cooling of 4.6 K. Two thirds of this cooling can be attributed to increased planetary albedo, the remaining one third to a weaker greenhouse effect. The Marinoan Snowball Earth bifurcation point for pre-industrial atmospheric carbon dioxide is between 95.5 and 96% of the present-day total solar irradiance (TSI, whereas a previous study with the same model found that it was between 91 and 94% for present-day surface boundary conditions. A Snowball Earth for TSI set to its Marinoan value (94% of the present-day TSI is prevented by quadrupling carbon dioxide with respect to its pre-industrial level. A zero-dimensional energy balance model is used to predict the Snowball Earth bifurcation point from only the equilibrium global mean ocean potential temperature for present-day TSI. We do not find stable states with sea-ice cover above 55%, and land conditions are such that glaciers could not grow with sea-ice cover of 55%. Therefore, none of our simulations qualifies as a "slushball" solution. In summary, our results contradict previous claims that Snowball Earth initiation would require "extreme" forcings.

  14. Elastic Constants of Solids and Fluids with Initial Pressure via a Unified Approach Based on Equations-of-State

    Science.gov (United States)

    Cantrell, John H.

    2014-01-01

    The second and third-order Brugger elastic constants are obtained for liquids and ideal gases having an initial hydrostatic pressure p(sub 1). For liquids the second-order elastic constants are C(sub 11) = A + p(sub 1), C(sub 12) = A -- p(sub 1), and the third-order constants are C(sub 111) = --(B + 5A + 3p(sub 1)), C(sub 112) = --(B + A -- p(sub 1)), and C(sub 123) = A -- B -- p1, where A and B are the Beyer expansion coefficients in the liquid equation of state. For ideal gases the second order constants are C(sub 11) = p(sub 1)gamma + p9sub 1), C(sub 12) = p(sub 1)gamma -- p(sub 1), and the third-order constants are C(sub 111) = p(sub 1)(gamma(2) + 4gamma + 3), C(sub 112) = --p(sub 1)(gamma(2) -- 1), and C(sub 123) = --p(sub 1) (gamma(2) -- 2gamma + 1), where gamma is the ratio of specific heats. The inequality of C(sub 11) and C(sub 12) results in a nonzero shear constant C(sub 44) = (1/2)(C(sub 11) C(sub 12)) = p(sub 1) for both liquids and gases. For water at standard temperature and pressure the ratio of terms p1/A contributing to the second-order constants is approximately 4.3 x 10(-5). For atmospheric gases the ratio of corresponding terms is approximately 0.7. Analytical expressions that include initial stresses are derived for the material 'nonlinearity parameters' associated with harmonic generation and acoustoelasticity for fluids and solids of arbitrary crystal symmetry. The expressions are used to validate the relationships for the elastic constants of fluids.

  15. The Nanomaterial Data Curation Initiative: A collaborative approach to assessing, evaluating, and advancing the state of the field

    Directory of Open Access Journals (Sweden)

    Christine Ogilvie Hendren

    2015-08-01

    Full Text Available The Nanomaterial Data Curation Initiative (NDCI, a project of the National Cancer Informatics Program Nanotechnology Working Group (NCIP NanoWG, explores the critical aspect of data curation within the development of informatics approaches to understanding nanomaterial behavior. Data repositories and tools for integrating and interrogating complex nanomaterial datasets are gaining widespread interest, with multiple projects now appearing in the US and the EU. Even in these early stages of development, a single common aspect shared across all nanoinformatics resources is that data must be curated into them. Through exploration of sub-topics related to all activities necessary to enable, execute, and improve the curation process, the NDCI will provide a substantive analysis of nanomaterial data curation itself, as well as a platform for multiple other important discussions to advance the field of nanoinformatics. This article outlines the NDCI project and lays the foundation for a series of papers on nanomaterial data curation. The NDCI purpose is to: 1 present and evaluate the current state of nanomaterial data curation across the field on multiple specific data curation topics, 2 propose ways to leverage and advance progress for both individual efforts and the nanomaterial data community as a whole, and 3 provide opportunities for similar publication series on the details of the interactive needs and workflows of data customers, data creators, and data analysts. Initial responses from stakeholder liaisons throughout the nanoinformatics community reveal a shared view that it will be critical to focus on integration of datasets with specific orientation toward the purposes for which the individual resources were created, as well as the purpose for integrating multiple resources. Early acknowledgement and undertaking of complex topics such as uncertainty, reproducibility, and interoperability is proposed as an important path to addressing key

  16. Elastic constants of solids and fluids with initial pressure via a unified approach based on equations-of-state.

    Science.gov (United States)

    Cantrell, John H

    2014-07-01

    The second and third-order Brugger elastic constants are obtained for liquids and ideal gases having an initial hydrostatic pressure p1. For liquids the second-order elastic constants are C₁₁=A+p₁, C₁₂=A-p₁, and the third-order constants are C₁₁₁=-(B+5A+3p₁), C₁₁₂=-(B+A-p₁), and C₁₂₃=A-B-p₁, where A and B are the Beyer expansion coefficients in the liquid equation of state. For ideal gases the second-order constants are C₁₁=p₁γ+p₁, C₁₂=p₁γ-p₁, and the third-order constants are C₁₁₁=-p₁(γ(2)+4γ+3), C₁₁₂=-p₁(γ(2)-1), and C₁₂₃=-p₁ (γ(2)-2γ+1), where γ is the ratio of specific heats. The inequality of C₁₁ and C₁₂ results in a nonzero shear constant C₄₄=(1/2)(C₁₁-C₁₂)=p₁ for both liquids and gases. For water at standard temperature and pressure the ratio of terms p₁/A contributing to the second-order constants is approximately 4.3×10(-5). For atmospheric gases the ratio of corresponding terms is approximately 0.7. Analytical expressions that include initial stresses are derived for the material 'nonlinearity parameters' associated with harmonic generation and acoustoelasticity for fluids and solids of arbitrary crystal symmetry. The expressions are used to validate the relationships for the elastic constants of fluids.

  17. The effect of tungsten addition on metallurgical state and solute content in nanocrystalline electrodeposited nickel

    Energy Technology Data Exchange (ETDEWEB)

    Shakibi Nia, N., E-mail: niusha.shakibi_nia@univ-lr.fr; Creus, J.; Feaugas, X.; Savall, C.

    2014-10-01

    Highlights: • The contamination in Ni and Ni–W deposited alloys is influenced by the elaboration conditions. • In nickel deposits the light elements contamination increased with grain size refinement. • According to SIMS analysis, H and O were distributed almost uniformly in Ni–W deposited alloys. • A maximum contamination for H, O and N around 10 at.% of W was found by the hot extraction method. - Abstract: It is usually difficult to control the incorporation of foreign species in electrodeposited coatings originating from the solvent or the chemical species used for the electrodeposition bath. However, the presence of these impurities can modify their physicochemical properties. In the present study, complementary analytical techniques were used to evaluate the chemical contamination in nickel and nickel–tungsten alloys, electrodeposited from additive free baths. In order to better understand the relationship between impurity content and grain size refinement, the concentration of light elements (H, O and N) was systematically quantified by hot extraction analysis. Also, the distribution of contaminants was evaluated by SIMS analysis. We have shown that in nanocrystalline electrodeposited nickel the grain size refinement and the impurity contents are strongly related. However, in Ni–W alloys the evolution of the contamination is more complex, with a maximum amount for W contents around 10 at.%.

  18. Microstructural features and microhardness of Fe-Mo-Nb-V-C low-carbon steel processed by high-pressure torsion: The significance of the initial structural state

    Science.gov (United States)

    Maier, Galina; Astafurova, Elena; Melnikov, Eugene; Naydenkin, Eugene; Smirnov, Alexander; Bataev, Vladimir; Dobatkin, Sergey

    2016-11-01

    The effect of the initial heat treatment (quenching or tempering) of low-carbon steel (Fe-Mo-Nb-V-C) on special features of the ultrafine-grained structure and microhardness produced by high-pressure torsion was investigated. High-pressure torsion promotes the more apparent refinement of structural elements of the steel (dpr = 55 nm for the quenched state and 74 nm for the tempered state) and an increase in structural homogeneity of microhardness of quenched specimens in comparison with tempered ones. Experimental results reveal a high significance of the initial structural state for the final deformation-processed microstructure and microhardness (radial distribution) of steel specimens.

  19. Sensitivity of hadronic and electromagnetic spectra to equation of state and initial energy density in the Pb + Pb collisions at SPS

    CERN Document Server

    Huovinen, P; Sollfrank, J; Huovinen, Pasi; Sollfrank, Josef

    1999-01-01

    We study Pb+Pb collisions at 158 A GeV/c using a hydrodynamical approach. We test different equations of state (EoSs) and different initial conditions and show that there are more than one initial state for each EoS which reproduce the observed hadronic spectra. We also find that different equations of state favour different freeze-out temperature. Simultaneously we calculate the thermal dilepton and photon spectra for each EoS and initial state. We compare the dilepton mass spectrum to data measured by the CERES collaboration and find that the differences in spectra obtained using different EoSs and initial states are not resolvable within the current experimental resolution. However, at invariant masses over 2 GeV the difference in the yield due to various initial states is close to an order of magnitude. We also study the rapidity distribution of lepton pairs and find that for masses around 800 MeV the shape of the distribution depends strongly on the EoS.

  20. Measurement of $e^+e^- \\to \\pi^+\\pi^-\\psi(2S)$ via Initial State Radiation at Belle

    CERN Document Server

    Wang, X L; Shen, C P; Wang, P; Abdesselam, A; Adachi, I; Aihara, H; Said, S Al; Arinstein, K; Asner, D M; Ayad, R; Bakich, A M; Bansal, V; Bhuyan, B; Bobrov, A; Bonvicini, G; Bračko, M; Browder, T E; Červenkov, D; Chang, P; Chekelian, V; Chen, A; Cheon, B G; Chilikin, K; Chistov, R; Cho, K; Chobanova, V; Choi, S -K; Choi, Y; Cinabro, D; Dalseno, J; Danilov, M; Doležal, Z; Drásal, Z; Drutskoy, A; Dutta, K; Eidelman, S; Farhat, H; Fast, J E; Ferber, T; Gaur, V; Garmash, A; Getzkow, D; Gillard, R; Goh, Y M; Haba, J; Hayasaka, K; Hayashii, H; He, X H; Hou, W -S; Iijima, T; Inami, K; Ishikawa, A; Itoh, R; Iwasaki, Y; Joffe, D; Julius, T; Kang, K H; Kato, E; Kawasaki, T; Kiesling, C; Kim, D Y; Kim, H J; Kim, J B; Kim, J H; Kim, M J; Kim, S H; Kim, Y J; Kinoshita, K; Ko, B R; Kodyš, P; Korpar, S; Krokovny, P; Kuzmin, A; Kwon, Y -J; Lange, J S; Lee, I S; Lewis, P; Li, Y; Gioi, L Li; Libby, J; Liventsev, D; Lukin, P; Matvienko, D; Miyabayashi, K; Miyata, H; Mizuk, R; Moll, A; Mori, T; Mussa, R; Nakano, E; Nakao, M; Nanut, T; Natkaniec, Z; Nisar, N K; Nishida, S; Ogawa, S; Okuno, S; Olsen, S L; Pakhlov, P; Pakhlova, G; Park, C W; Park, H; Pedlar, T K; Pestotnik, R; Petrič, M; Piilonen, L E; Ribežl, E; Ritter, M; Rostomyan, A; Ryu, S; Sakai, Y; Sandilya, S; Santelj, L; Sanuki, T; Savinov, V; Schneider, O; Schnell, G; Schwanda, C; Semmler, D; Senyo, K; Shebalin, V; Shibata, T -A; Shiu, J -G; Sibidanov, A; Simon, F; Sohn, Y -S; Sokolov, A; Solovieva, E; Starič, M; Steder, M; Sumiyoshi, T; Tamponi, U; Tanida, K; Tatishvili, G; Teramoto, Y; Trabelsi, K; Uchida, M; Uglov, T; Unno, Y; Uno, S; Usov, Y; Van Hulse, C; Vanhoefer, P; Varner, G; Vinokurova, A; Wagner, M N; Watanabe, Y; Won, E; Yashchenko, S; Yusa, Y; Zhang, Z P; Zhilich, V; Zupanc, A

    2014-01-01

    We report measurement of the cross section of $e^+e^-\\to \\pi^+\\pi^-\\psi(2S)$ between 4.0 and $5.5 {\\rm GeV}$, based on an analysis of initial state radiation events in a $980 \\rm fb^{-1}$ data sample recorded with the Belle detector. The properties of the $Y(4360)$ and $Y(4660)$ states are determined. Fitting the mass spectrum of $\\pi^+\\pi^-\\psi(2S)$ with two coherent Breit-Wigner functions, we find two solutions with identical mass and width but different couplings to electron-positron pairs: $M_{Y(4360)} = (4347\\pm 6\\pm 3) {\\rm MeV}/c^2$, $\\Gamma_{Y(4360)} = (103\\pm 9\\pm 5) {\\rm MeV}$, $M_{Y(4660)} = (4652\\pm10\\pm 8) {\\rm MeV}/c^2$, $\\Gamma_{Y(4660)} = (68\\pm 11\\pm 1) \\rm MeV$; and ${\\cal{B}}[Y(4360)\\to \\pi^+\\pi^-\\psi(2S)]\\cdot \\Gamma_{Y(4360)}^{e^+e^-} = (10.9\\pm 0.6\\pm 0.7) \\rm eV$ and ${\\cal{B}}[Y(4660)\\to \\pi^+\\pi^-\\psi(2S)]\\cdot \\Gamma_{Y(4660)}^{e^+e^-} = (8.1\\pm 1.1\\pm 0.5) \\rm eV$ for one solution; or ${\\cal{B}}[Y(4360)\\to \\pi^+\\pi^-\\psi(2S)]\\cdot \\Gamma_{Y(4360)}^{e^+e^-} = (9.2\\pm 0.6\\pm 0.6) \\rm ...

  1. Metallurgical coke quality depending on the variability of properties of coking coal mixes components

    Energy Technology Data Exchange (ETDEWEB)

    M. Kaloc; S. Bartusek; S. Czudek [VSB-TU Ostrava (Czech Republic)

    2005-07-01

    The main sources for this report are the experiences acquired by the long lasting practice of the coking coal mixes preparing and tuning them in accordance with the variable qualitative properties of the coals mined in the coalfields of the OKD Company Ostrava. The systematic database, made by summarizing the values of measured indexes, became a very useful instrument for the coal mixes composing with regard on the two today very important points of view, namely: Contemporary presence and the long lasting availability of the definite coal type from any local source. Price basis influencing strongly the economics of the coke production. The method of prognostic estimating of the metallurgical coke quality dependence on the coking mixes composition, developed some time ago by authors of presented paper, was published in the Cokemaking International Vol. 13, 2/2001 (Czudek S. and al.: Simulation of Carbonization Process under Laboratory Conditions). The original procedure was newly accomplished by implementing a special method of the multi criteria evaluation of the definite coal components. New method is based on special processing of the technologic significant qualitative properties of the mined coal brands enabling deeply estimate the impacts of their application in metallurgical coke production. The importance of this evaluating system exceeds largely the well known method that is incorporated in the international coal classification. The main advantage of the new method is the fully respecting of the specialties marking the geographic different coalfields. (Abstract only)

  2. Metallurgical Laboratory Hazardous Waste Management Facility groundwater monitoring report. Fourth quarter 1993 and 1993 summary

    Energy Technology Data Exchange (ETDEWEB)

    1994-03-01

    The AMB wells at the Metallurgical Laboratory Hazardous Waste Management Facility (Met Lab HWMF) are monitored for selected constituents to comply with the Natural Resources Defense council et al. Consent Decree of May 1988 that identifies the Met Lab HWMF as subject to the Resource Conservation and Recovery Act. In addition, the wells are monitored, as requested, for other constituents as part of the Savannah River Site (SRS) Groundwater Monitoring Program. During the fourth quarter 1993, samples from AMB groundwater monitoring wells at the Metallurgical Laboratory Hazardous Waste Management Facility were analyzed for selected heavy metals, indicator parameters, radionuclides, volatile organic compounds, and other constituents. Six parameters exceeded standards during the quarter. As in previous quarters, dichloromethane (methylene chloride), tetrachloroethylene, and trichloroethylene exceeded final Primary Drinking Water Standards; pH, specific conductance, and total organic halogens exceeded the Savannah River Site Flag 2 criteria in one or more of the wells. Groundwater flow direction and rate in the water-table unit were similar to previous quarters.

  3. Ecological Risk Assessment of Lead (Pb after Waste Disposal from Metallurgical Industries

    Directory of Open Access Journals (Sweden)

    Jahangir Jafari

    2010-07-01

    Full Text Available Not being available sufficient information about ERA of lead, this paper provides a brief critical review to the mentioned concept. Being presented in soils, heavy metals constitute serious environmental hazards from the point of view of polluting the soils and adjoining streams and rivers. Pb is generally the metal of great concern as well as being phytotoxic. Ecological risk assessment is a process that evaluates the likelihood that adverse ecological effects may occur or are occurring as a result of exposure to one or more stressors. Metallurgical waste like other waste materials consists not only of Pb, but also consists in large quantities relatively. The ubiquitous distribution and known toxicity of lead pollution in urban environment are posing great concern, in term of human health and environment. According to the importance and criticality of this issue, a holistic risk-based approach is inevitable at least for environmental health and monitoring (EHM. Reviewing literature, it is found that approximately most of the researches have been carried out in aquatic environments. From the other side, those carried out in terrestrial environment, are non-Pb focusing. Considering the researches pertaining to ERA, however few researches have been carried out in the field of metallurgical industries, none of them has addressed the Pb ERA in a holistic approach.

  4. Study of the Metallurgical Aspects of Steel Micro-Alloying by Titan

    Directory of Open Access Journals (Sweden)

    Kijac, J.

    2006-01-01

    Full Text Available The metal properties upgrading applying it’s alloying with the simultaneous limitation of the impurities represents a prospective possibility of the metallurgical production further development. The interaction of the alloying substance active element with oxygen in metal and adjacent multiphase environment occurs under the actual conditions. Present paper is oriented particularly to the thermodynamic aspects of deoxygenation by titan in process of production of micro alloyed low carbon steel in two plants (oxygen converter 1-OC1 and 2-OC2 with the different effect of micro-alloy exploitation. Analysis of the effect of the metallurgical factors on the titan smelting loss in micro-alloyed steel production points at the need to master the metal preparation for the alloying and especially has got the decisive effect upon the oxidizing ability and rate of the slag phase availability. When comparing the micro-alloying matter yield among the individual production units, disclosed have been better results obtained in plant OC 2. Confirmed has been the effect of the slag amount (average amount of 7,3 t at OC 1 and 5,83 t at OC 2 and its quality during the steel tapping as one among the most significant factors affecting the alloying process and which also represent its oxidizing potential.

  5. Possibilities of Formation of Dioxins and Furans in Metallurgical Processes as well as Methods of their Reduction

    Directory of Open Access Journals (Sweden)

    Holtzer, M.

    2007-01-01

    Full Text Available The metallurgical industry, among others, generates various kinds of wastes: gaseous, dusts, wastes and sewage. Special attention of the European Union is directed towards the elimination or significant reduction of the gaseous-dust contamination emissions including the most hazardous compounds, such as dioxins and furans. In the article the sources of dioxins and furans in metallurgical industry are described along with the reduction methods of these pollutants. Particularly the activities recommended as the Best Available Techniques (BAT in order to reduce the PCDD/PCDF emission from sintering processes, non-ferrous metallurgy and foundry engineering have been presented.

  6. Measures to restore metallurgical mine wasteland using ecological restoration technologies: A case study at Longnan Rare Earth Mine

    Science.gov (United States)

    Rao, Yunzhang; Gu, Ruizhi; Guo, Ruikai; Zhang, Xueyan

    2017-01-01

    Whereas mining activities produce the raw materials that are crucial to economic growth, such activities leave extensive scarring on the land, contributing to the waste of valuable land resources and upsetting the ecological environment. The aim of this study is therefore to investigate various ecological technologies to restore metallurgical mine wastelands. These technologies include measures such as soil amelioration, vegetation restoration, different vegetation planting patterns, and engineering technologies. The Longnan Rare Earth Mine in the Jiangxi Province of China is used as the case study. The ecological restoration process provides a favourable reference for the restoration of a metallurgical mine wasteland.

  7. Correlation Between the Efficiency of Machinery and Equipment and the Productivity of Workers and its Effect on the Performance of a Metallurgical Undertaking

    Directory of Open Access Journals (Sweden)

    Kulawik, A.

    2007-01-01

    Full Text Available In this paper the example of procedure of life and objectify work effectiveness analysis in metallurgical enterprise were presented. Besides, on the example of chosen units of metallurgical enterprise, results of analysis - based on methodic proposed in the article - were discussed.

  8. Study of the pi+pi-J//psi Mass Spectrum Via Initial State Radiation at BaBar

    Energy Technology Data Exchange (ETDEWEB)

    Aubert, Bernard; /

    2008-08-15

    We present an update of the study of the Y(4260) resonance, produced in the process e{sup +}e{sup -} {yields} {gamma}{sub ISR} {pi}{sup +}{pi}{sup -} J/{psi} using initial-state radiation events at the PEP-II e{sup +}e{sup -} storage rings. This study is based on 454 fb{sup -1} of data recorded with the BABAR detector at a center-of-mass energy in the {Upsilon}(4S) resonance region. From a fit with a single non-relativistic Breit-Wigner shape we obtain updated parameters for the Y(4260) resonance which are m{sub Y} = 4252 {+-} 6{sub -3}{sup +2} MeV/c{sup 2} and {Lambda}{sub Y} = 105 {+-} 18{sub -6}{sup +4} MeV/c{sup 2}; we also measure {Beta}({pi}{sup +}{pi}{sup -} J/{psi}){Lambda}{sub e{sup +}e{sup -}} = (7.5 {+-} 0.9 {+-} 0.8) eV. We cannot confirm the recent BELLE observation of a broad structure around 4.05GeV/c{sup 2} in this decay mode.

  9. Effect of initial-state target polarization on the single ionization of helium by 1-keV electron impact

    Institute of Scientific and Technical Information of China (English)

    Sun Shi-Yan; Ma Xiao-Yan; Li Xia; Miao Xiang-Yang; Jia Xiang-Fu

    2012-01-01

    We report new results of triple differential cross sections for the single ionization of helium by 1-KeV electron impact at the ejection energy of 10 eV.Investigations have been made for both the perpendicular plane and the plane perpendicular to the momentum transfer geometries.The present calculation is based on the three-Coulomb wave function.Here we have also incorporated the effect of target polarization in the initial state.A comparison is made between the present calculation with the results of other theoretical methods and a recent experiment [Diirr M,Dimopoulou C,Najjari B,Dorn A,Bartschat K,Bray I,Fursa D V,Chen Z,Madison D H and Ullrich J 2008 Phys.Rev.A 77 032717(]).At an impact energy of l KeV,the target polarization is found to induce a substantial change of the cross section for the ionization process.We observe that the effect of target polarization plays a dominant role in deciding the shape of triple differential cross sections.

  10. An Investigation of the Awareness and Use of Open Access Initiative at the Federal Polytechnic, Offa, Kwara State, Nigeria

    Directory of Open Access Journals (Sweden)

    Issa, A.O.

    2014-09-01

    Full Text Available This study investigated the information environment of lecturers in Federal Polytechnic, Offa, Kwara State, Nigeria, in relation to their information seeking behavior, extent of use of the polytechnic library, perceptions of the resources and services of the library, level of awareness and extent of use of the open access model of scholarly communications, as well as the challenges of accessing and using information resources. It adopted the survey research method, using a questionnaire for data collection, while the descriptive statistics method was used to analyse the data, using tabular presentation and simple percentages. From a population of 280 lecturers for the study, a purposive sample of 164 was drawn. The findings showed that the lecturers' information needs are focused on online use; they hardly use the polytechnic library due to their perceptions of the resources and services of the library. They are, to a greater extent, aware of open access initiatives, but do not publish in open access outlets, while various challenges affect their access and use of information resources for teaching and research. A recommendation was made, among others, that the polytechnic management should pay more critical attention to the library especially in the areas of adequate, current and comprehensive collections on all the programmes of the institution, as well as the provision of wireless internet services on the campus through a public-private partnership arrangement.

  11. Alabama's Education Coalition Focuses on Supporting the State's Math, Science and Technology Initiative and on Building Distance Learning Programs

    Science.gov (United States)

    Denson, R. L.

    2003-12-01

    The Alabama Math Science Technology Educational Coalition (AMSTEC) was formed as a non-profit after a 1998 NASA Linking Leaders program brought in education and corporate leaders to address systemic education reform in Alabama public schools. AMSTEC was instrumental in the creation of the Alabama Math Science Technology Initiative (AMSTI), a K-12 program designed using data from national and international research and local teacher survey. In the face of dwindling government support in a state ranked last in education funding, AMSTEC believes that its best hope for improved STEM education lies in strengthening its community/industry partnerships and building upon the Department of Education's newly created AMSTI program. NASA's GLOBE program is the primary earth science education component being integrated into AMSTI. AMSTI is structured to provide teachers with (1) the materials, equipment, technology and supplies necessary to deliver high quality, inquiry-based instruction; (2) professional development linked directly to the educational resources with the intent of strengthening content knowledge, instructional strategies, and use of assessment tools; and (3) on-site support and mentoring throughout the year in the interest of achieving these goals. Roles for community partners to support these objectives far exceed that of mere funding - especially in the area of mentoring and professional development. Currently, AMSTEC consists of 100+ members including classroom teachers and district officers, education department representatives from higher educational institutions, policy makers and administrators, and government and industry representatives. AMSTEC remains partially tied to NASA fiscally and is administratively housed by the National Space Science and Technology Center's Earth System Science Center. AMSTEC's partnership emphasis is focused on increasing corporate and industry participation to support the implementation of AMSTI and its hub

  12. Metallurgical source-contribution analysis of PM10 annual average concentration: A dispersion modeling approach in moravian-silesian region

    Directory of Open Access Journals (Sweden)

    P. Jančík

    2013-10-01

    Full Text Available The goal of the article is to present analysis of metallurgical industry contribution to annual average PM10 concentrations in Moravian-Silesian based on means of the air pollution modelling in accord with the Czech reference methodology SYMOS´97.

  13. Morphology, chemistry and distribution of neoformed spherulites in agricultural land affected by metallurgical point-source pollution

    NARCIS (Netherlands)

    Leguedois, S.; Oort, van F.; Jongmans, A.G.; Chevalier, P.

    2004-01-01

    Metal distribution patterns in superficial soil horizons of agricultural land affected by metallurgical point-source pollution were studied using optical and electron microscopy, synchrotron radiation and spectroscopy analyses. The site is located in northern France, at the center of a former entry

  14. Silver-cadmium alloys: Physical and metallurgical properties. (Latest citations from the EI Compendex*plus database). Published Search

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-05-01

    The bibliography contains citations concerning the metallurgical and physical properties of silver-cadmium alloys, oxides, and sulfides. The phase relationships and crystal structure of this alloy system are presented. Applications for electrical contact devices are discussed extensively. (Contains 50-250 citations and includes a subject term index and title list.) (Copyright NERAC, Inc. 1995)

  15. Determinant factors for the growing of shareholders’ equity in the metallurgical sector in Romania

    Directory of Open Access Journals (Sweden)

    R. S. Berinde

    2014-07-01

    Full Text Available The article provides a statistical monograph of the financial position and performance for the period 2008 – 2012 of the entities from the Romanian metallurgical sector whose financial statements in the period 2004 – 2012 have become the object of the financial audit. There are tested five types of regression models in order to separately determine the evolution of equity in accordance with the variation of turnover, total assets, average number of employees and net result. After determining the most appropriate simple regression model, one proceeds at establishing a multiple regression model which would simultaneously reflect the evolution of equity in accordance with the above mentioned variables. The study’s importance is enhanced by certain statistically-based concrete measures which management should consider in order to increase the shareholders’ equity.

  16. Utilizing of the metallurgical slag for production of cementless concrete mixtures

    Directory of Open Access Journals (Sweden)

    D. Baricová

    2012-10-01

    Full Text Available In process of pig iron, steel and cast iron production besides main product, also secondary products are formed, that have character of secondary raw materials and industrial wastes. The most abundant secondary product originating in the metallurgical process is furnace slag. Total amount of accured slag, also its chemical, mineralogical, physical – chemical properties and similarity with natural stones predestinate its utilisation in different fields of industry. The contribution deals with production of cementless concrete mixtures, where the main parts were formed by blast furnace granulated slag grinded and different gravel slag from blast furnace, oxygen converter and electric arc furnace. As activators of solidification different kinds of water glass were tested.

  17. Using SPL (Spent Pot-Lining) as an Alternative Fuel in Metallurgical Furnaces

    Science.gov (United States)

    Gao, Lei; Mostaghel, Sina; Ray, Shamik; Chattopadyay, Kinnor

    2016-09-01

    Replacing coke (coal) in a metallurgical furnace with other alternative fuels is beneficial for process economics and environmental friendliness. Coal injection is a common practice in blast furnace ironmaking, and spent pot-lining (SPL) was conceptualized as an alternative to coal. SPL is a resourceful waste from primary Aluminum production, with high carbon value. Equilibrium thermodynamics was used to calculate the energy content of SPL, and the compositional changes during SPL combustion. In order to capture the kinetics and mass transfer aspects, a blast furnace tuyere region CFD model was developed. The results of SPL combustion were compared with standard PCI coals, which are commonly used in blast furnaces. The CFD model was validated with experimental results for standard high volatile coals.

  18. Effects of heat treatment on epitaxial silicon solar cells on metallurgical silicon substrates

    Science.gov (United States)

    Chu, T. L.; Chu, S. S.; Kazmerski, L. L.; Whitney, R.; Lin, C. L.; Davis, R. M.

    1981-12-01

    A preparation of acid extracted metallurgical grade silicon as a large-grain substrate for solar cells is described. Metallic impurities which normally accumulate on the grain boundaries of pulverized Si were removed by 400 hr of aqua regia refluxing. Secondary ion mass spectrometry (SIMS) revealed that aluminum and iron concentrations were significantly reduced, and the Si was made into sheets by unidirectional solidification on an RF-heated graphite plate. Solidification at 1-2 cm/min yielded a (110) crystallite orientation; SIMS determined that remaining impurities were uniformly diffuse, and heat treatment in He at 700 C resulted in precipitation of metallic impurities onto the grain boundaries. Trichlorosilane was thermally reduced to form an epitaxial film on the Si substrate, and 37 sq cm cells were fabricated with an efficiency of 8.95%.

  19. GEOLOGY OF THE FLORENCIA GOLD – TELLURIDE DEPOSIT (CAMAGÜEY, CUBA AND SOME METALLURGICAL CONSIDERATIONS

    Directory of Open Access Journals (Sweden)

    López K Jesús M.

    2006-12-01

    Full Text Available This paper describes the results from a study of the Florencia gold-telluride deposit in Central Cuba, including mineralogical, petrographical, microprobe and chemical analysis. Valuable information is provided for the exploration, mining and processing of gold ores from other nearby deposits with similar characteristics. Results highlight changes in the mineralogical composition of the ores between the north and south sectors of the deposit, as reflected in metallurgical concentrates after beneficiation and flotation of samples from these sectors.
    It is shown that gold deposits of the Cretaceous Volcanic Arc of Cuba largely consist of native gold, telluride and pyrite, where arsenopyrite is almost absent. Traces of lead, zinc and cadmium are present in the periphery of the main ore zones.

  20. Determination of Japanese buyer valuation of metallurgical coal characteristics by hedonic modeling

    Energy Technology Data Exchange (ETDEWEB)

    Koerner, R.J. [Griffith University, Brisbane, Qld. (Australia). Graduate School of Management

    2001-09-01

    Considerable efforts have been devoted by econometric researchers to understanding Japanese steel mill (JSM) metallurgical coal valuation policies, and whether such policies disadvantage coal exporters. Much of this research has employed the hedonic regression modeling technique of Rosen and examines the significance of coal quality in establishing market price. This article discusses shortcomings in some such modeling studies, and presents results of additional hedonic modeling to buttress findings of previous work suggesting that cross-cultural bargaining factors rather than coal quality explain lower prices for Australian coals in Japanese market settlements. Policy changes that might be effective in ameliorating bilateral market distortions arising from oligopsony characteristics exhibited in JSM contract settlements are then explored. 29 refs., 2 figs., 2 tabs.

  1. Effect of heavy metals on soil nematode communities in the vicinity of a metallurgical factory

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    The influence of Cu and Zn on soil nematode communities was examined along a pollution gradient with increasing distance from a metallurgical factory. Total and available heavy metal contents were used to study the effects of heavy metals on nematode abundance, trophic groups and ecological indices. The results demonstrated significant correlations between the number of total nematodes, bacterivores, plant-parasites and the total and available heavy metals. Bacterivores and plant-parasites were the dominant trophic groups. Significant differences in different sampling sites were found only in the number of bacterivores(P<0.0l).The Shannon-Weaver diversity index(H'), trophic diversity index(TD), evenness index(J ') and dominance index(X) were found to be sensitive to soil pH and C/N ratios. Significant correlations were found between the total nematodes (TNEM), some genera (A crobeloides, A phelenchoides, Cephalobus, Ditylenchus, Mesorhabditis, Tetylenchus and Tylenchus ) and distance from the factory.

  2. Natural sedimentation of insoluble particles during directional solidification of upgraded metallurgical-grade silicon

    Science.gov (United States)

    Gan, C. H.; Xiong, H. P.; Fang, M.; Qiu, S.; Xing, P. F.; Luo, X. T.

    2016-04-01

    Upgraded metallurgical-grade silicon is used to cast an ingot by directional solidification. Black shadows are randomly distributed in the ingot, and the shadows are caused by natural sedimentation of insoluble particles. The insoluble particles mainly consist of SiC and Si3N4. SiC and Si3N4 exist as foreign particles and mainly sedimentate at the bottom of the ingot, not generating during directional solidification. Melt convection performs an important role in the sedimentation, resulting in the insoluble particles in the ingot center more than the nearby. Interestingly, since SiC and Si3N4 will not be the recombination center of the minority carrier, the insoluble particles do not have a significant influence on the minority carrier lifetime. In particular, the sedimentation is discussed according to the thermodynamics and kinetics in detail.

  3. Metallurgical Laboratory Hazardous Waste Management Facility groundwater monitoring report. Second quarter 1994

    Energy Technology Data Exchange (ETDEWEB)

    1994-09-01

    During second quarter 1994, samples from AMB groundwater monitoring wells at the Metallurgical Laboratory Hazardous Waste Management Facility were analyzed for selected heavy metals, indicator parameters, radionuclides, volatile organic compounds, and other constituents. Three parameters exceeded standards during the quarter. As in previous quarters, tetrachloroethylene and trichloroethylene exceeded final Primary Drinking Water Standards. Total organic halogens exceeded the Savannah River Site (SRS) Flag 2 criteria in two of the wells. Groundwater flow direction and rate in the M-Area Aquifer Zone were similar to previous quarters. Conditions affecting determination of groundwater flow directions and rates in the Upper Lost Lake Aquifer Zone, Lower Lost Lake Aquifer Zone, and the Middle Sand Aquifer Zone of the Crouch Branch Confining Unit were also similar to previous quarters. During second quarter 1994, SRS received SCDHEC approval for five point-of-compliance wells and two plume definition wells near the Met Lab HWMF. Field work has begun on this project.

  4. Metallurgical Laboratory Hazardous Waste Management Facility groundwater monitoring report. First quarter 1995

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1995-06-01

    During first quarter 1995, samples from AMB groundwater monitoring wells at the Metallurgical Laboratory Hazardous Waste Management Facility (Met Lab HWMF) were analyzed for selected heavy metals, field measurements, radionuclides, volatile organic compounds, and other constituents. Six parameters exceeded standards during the quarter. As in previous quarters, tetrachloroethylene and trichloroethylene exceeded final Primary Drinking Water Standards (PDWS). Total organic halogens exceeded its Savannah River Site (SRS) Flag 2 criterion during first quarter 1995 as in fourth quarter 1994. Aluminum, iron, and manganese, which were not analyzed for during fourth quarter 1994, exceeded the Flag 2 criteria in at least two wells each during first quarter 1995. Groundwater flow direction and rate in the M-Area Aquifer Zone were similar to previous quarters. Conditions affecting the determination of groundwater flow directions and rates in the Upper Lost Lake Aquifer Zone, Lower Lost Lake Aquifer Zone, and the Middle Sand Aquifer Zone of the Crouch Branch Confining Unit were also similar to previous quarters.

  5. Evaluation of professional risk of malignant new tumors in workers of mining metallurgical plant

    Directory of Open Access Journals (Sweden)

    Igor Kudryavcev

    2010-07-01

    Full Text Available The study has showed the existence of high professional risk(standardized relative risk of malignant new tumors (MNTdevelopment in major productions of Navoi Mining andMetallurgical Combine (NMMC in not less than 60% of populationinvolved in working environment and labor process. Less than high,but statistically significant professional risk exists for employees ofsubsidiary industries, who periodically are exposed to complexproduction-professional factors. This necessitates the developmentand implementation for these groups of workers a special system ofpreventive measures aimed both at primary prevention of cancerpathology, i.e. reduction in intensity of effecting production factorsor reduction of affected groups, and to improve and increase theefficiency of secondary prevention, i.e. early diagnosis and efficienttreatment of cancer patients.

  6. Employment and other selected personnel attributes in metallurgical and industrial enterprises of different size - research results

    Directory of Open Access Journals (Sweden)

    A. Pawliczek

    2015-10-01

    Full Text Available The presented paper deals with the issue of employment and other selected personnel attributes as employees’ affiliations, employees’ benefits, monitoring of employees’ satisfaction, monitoring of work productivity, investments into employees education and obstacles in hiring qualified human resources. The characteristics are benchmarked on the background of enterprise size based on the employees count in the year 2013. The relevant data were collected in Czech industrial enterprises, including metallurgical companies, with the help of university questionnaire research in order to induce synergy effect arising from mutual communication of academy-students-industry. The most important results are presented later in the paper, complemented with discussion based on relevant professional literature sources. The findings suggest that bigger companies check productivity and satisfaction and dismiss employees more frequently, unlike medium companies which do not reduce their workforce and solve the impact of crisis by decreased affiliations, reduced benefits and similar savings.

  7. Termination of the Special Metallurgical (SM) Building at Mound Laboratory: a final report

    Energy Technology Data Exchange (ETDEWEB)

    Harris, W.R.; Kokenge, B.R.; Marsh, G.C.

    1976-12-22

    The report describes and highlights the more important factors associated with the termination of the Special Metallurgical (SM) Building at Mound Laboratory. As a result, a written record of the more important techniques and procedures is now available for reference by others involved in similar termination efforts. Included in this report is a description of the organizational units that were used in this effort along with a description of their responsibilities. A general description of the SM Building and a discussion of the more relevant procedures and equipment that were used are also presented. In addition, pertinent Health Physics information, such as personnel exposure, final wipe levels in the terminated facility, and assays of the structure, are provided. Based on the experience gained from this project, recommendations were made regarding the design of future radioactive material handling facilities so that when they are ultimately terminated the effort can be accomplished more efficiently.

  8. INVENTORY MANAGEMENT AND LEAN MANUFACTURING: A CASE STUDY IN A METALLURGICAL COMPANY

    Directory of Open Access Journals (Sweden)

    Ricardo Aurélio Quinhões Pinto

    2015-04-01

    Full Text Available This research aims to analyze the impact of the lean philosophy applied to inventory management as differential competitive performance in a metallurgical company and at the same time, establish parameters for comparison with the old management model, the Theory of Constraints. This is a descriptive case study, ex-post facto and sectional time. The first stage consisted of an exploratory survey and questionnaires. To collect data, personal interviews with managers in the areas of logistics, operations and employees on the shop floor were performed. As a result, it was observed that after the implementation of lean philosophy, the company achieved greater interactivity in information management between internal and external factors, which allowed the reduction of production costs, improved product quality disposing of large stocks security without compromising the level of service offered to the customer.

  9. Method of purifying metallurgical grade silicon employing reduced pressure atmospheric control

    Science.gov (United States)

    Ingle, W. M.; Thompson, S. W.; Chaney, R. E. (Inventor)

    1979-01-01

    A method in which a quartz tube is charged with chunks of metallurgical grade silicon and/or a mixture of such chunks and high purity quartz sand, and impurities from a class including aluminum, boron, as well as certain transition metals including nickel, iron, and manganese is described. The tube is then evacuated and heated to a temperature within a range of 800 C to 1400 C. A stream of gas comprising a reactant, such as silicon tetrafluoride, is continuously delivered at low pressures through the charge for causing a metathetical reaction of impurities of the silicon and the reactant to occur for forming a volatile halide and leaving a residue of silicon of an improved purity. The reactant which included carbon monoxide gas and impurities such as iron and nickel react to form volatile carbonyls.

  10. Metallurgical challenges in microelectronic 3D IC packaging technology for future consumer electronic products

    Institute of Scientific and Technical Information of China (English)

    K.; N.; TU; TIAN; Tian

    2013-01-01

    Metallurgical challenges in controlling the microstructural stability of Cu and solder microbumps in 3D IC packaging technol-ogy are discussed. Using uni-directional <111> oriented nanotwinned Cu, the controlled growth of oriented Cu6Sn5 on the nanotwinned Cu and its transformation to Cu3Sn without Kirkendall voids have been achieved. In order to join a stack of Si chips into a 3D device, multiple reflows of solder microbumps may be required; we consider localized heating to do so by the use of self-sustained explosive reaction in multi-layered Al/Ni thin films of nano thickness. It avoids re-melting of those solder joints which have been formed already in the 3D stacking structure.

  11. Change of the layout of an office of a metallurgical company: simple projects, big solutions.

    Science.gov (United States)

    Duarte, Luiz Carlos da Silva; Eckhardt, Moacir; da Motta, Giordano Paulo

    2012-01-01

    The posture, a good organization and the proper layout of the environment and workplaces have a positive influence on the income of an employee. To develop the work it is used a methodology that addressed the study phases of the theory involving the subject, description of the current situation, preparation of conceptions, choice of design, implementation and reporting of results. Through the project of "Change of the layout of an office of a metallurgical company" there was an intervention in these reported aspects providing improvements in the office, regarding ergonomic, layout, workplace and lighting issues, bringing welfare to the official, with the intent to improve its performance within the company and facilitating its actions, as the company's customer service. The results provided improvements in layout, in the workplace and especially in comfort for the human resources that perform their activities.

  12. The role of the transition state in polyatomic reactions: Initial state-selected reaction probabilities of the H + CH{sub 4} → H{sub 2} + CH{sub 3} reaction

    Energy Technology Data Exchange (ETDEWEB)

    Welsch, Ralph, E-mail: rwelsch@uni-bielefeld.de; Manthe, Uwe, E-mail: uwe.manthe@uni-bielefeld.de [Theoretische Chemie, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld (Germany)

    2014-11-07

    Full-dimensional calculations of initial state-selected reaction probabilities on an accurate ab initio potential energy surface (PES) have been communicated recently [R. Welsch and U. Manthe, J. Chem. Phys. 141, 051102 (2014)]. These calculations use the quantum transition state concept, the multi-layer multi-configurational time-dependent Hartree approach, and graphics processing units to speed up the potential evaluation. Here further results of these calculations and an extended analysis are presented. State-selected reaction probabilities are given for many initial ro-vibrational states. The role of the vibrational states of the activated complex is analyzed in detail. It is found that rotationally cold methane mainly reacts via the ground state of the activated complex while rotationally excited methane mostly reacts via H–H–CH{sub 3}-bending excited states of the activated complex. Analyzing the different contributions to the reactivity of the vibrationally states of methane, a complex pattern is found. Comparison with initial state-selected reaction probabilities computed on the semi-empirical Jordan-Gilbert PES reveals the dependence of the results on the specific PES.

  13. Potential Applications of Concentrated Solar Thermal Technologies in the Australian Minerals Processing and Extractive Metallurgical Industry

    Science.gov (United States)

    Eglinton, Thomas; Hinkley, Jim; Beath, Andrew; Dell'Amico, Mark

    2013-12-01

    The Australian minerals processing and extractive metallurgy industries are responsible for about 20% of Australia's total greenhouse gas (GHG) emissions. This article reviews the potential applications of concentrated solar thermal (CST) energy in the Australian minerals processing industry to reduce this impact. Integrating CST energy into these industries would reduce their reliance upon conventional fossil fuels and reduce GHG emissions. As CST technologies become more widely deployed and cheaper, and as fuel prices rise, CST energy will progressively become more competitive with conventional energy sources. Some of the applications identified in this article are expected to become commercially competitive provided the costs for pollution abatement and GHG mitigation are internalized. The areas of potential for CST integration identified in this study can be classed as either medium/low-temperature or high-temperature applications. The most promising medium/low-grade applications are electricity generation and low grade heating of liquids. Electricity generation with CST energy—also known as concentrated solar power—has the greatest potential to reduce GHG emissions out of all the potential applications identified because of the 24/7 dispatchability when integrated with thermal storage. High-temperature applications identified include the thermal decomposition of alumina and the calcination of limestone to lime in solar kilns, as well as the production of syngas from natural gas and carbonaceous materials for various metallurgical processes including nickel and direct reduced iron production. Hybridization and integration with thermal storage could enable CST to sustain these energy-intensive metallurgical processes continuously. High-temperature applications are the focus of this paper.

  14. ALTERNATIVE BINDERS TO BENTONITE FOR IRON ORE PELLETIZING : PART II : EFFECTS ON METALLURGICAL AND CHEMICAL PROPERTIES

    Directory of Open Access Journals (Sweden)

    Osman Sivrikaya

    2014-07-01

    Full Text Available This study was started to find alternative binders to bentonite and to recover the low preheated and fired pellet mechanical strengths of organic binders-bonded pellets. Bentonite is considered as a chemical impurity for pellet chemistry due to acid constituents (SiO2 and Al2O3. Especially addition of silica-alumina bearing binders is detrimental for iron ore concentrate with high acidic content. Organic binders are the most studied binders since they are free in silica. Although they yield pellets with good wet strength; they have found limited application in industry since they fail to give sufficient physical and mechanical strength to preheated and fired pellets. It is investigated that how insufficient preheated and fired pellet strengths can be improved when organic binders are used as binder. The addition of a slag bonding/strength increasing constituent (free in acidic contents into pellet feed to provide pellet strength with the use of organic binders was proposed. Addition of boron compounds such as colemanite, tincal, borax pentahydrate, boric acid together with organic binders such as CMC, starch, dextrin and some organic based binders, into magnetite and hematite pellet mixture was tested. After determining the addition of boron compounds is beneficial to recover the low pellet physical and mechanical qualities in the first part of this study, in this second part, metallurgical and chemical properties (reducibility - swelling index – microstructure – mineralogy - chemical content of pellets produced with combined binders (an organic binder plus a boron compound were presented. The metallurgical and chemical tests results showed that good quality product pellets can be produced with combined binders when compared with the bentonite-bonded pellets. Hence, the suggested combined binders can be used as binder in place of bentonite in iron ore pelletizing without compromising the pellet chemistry.

  15. Mechanical and Metallurgical Evaluation of Carburized, Conventionally and Intensively Quenched Steels

    Science.gov (United States)

    Giordani, T.; Clarke, T. R.; Kwietniewski, C. E. F.; Aronov, M. A.; Kobasko, N. I.; Totten, G. E.

    2013-08-01

    Steels subjected to carburizing, quenching, and tempering are widely used for components that require hardness and superficial mechanical resistance together with good core toughness. Intensive quenching is a method that includes advantages including crack prevention, increased mechanical resistance, and improvement in fatigue performance when subjected to very fast (intensive) cooling. However, achieving these advantages requires the formation of sufficiently high surface compressive residual stresses and fine grains at the core of steel components. If the cooling rate is sufficiently high after intensive quenching, then low-hardenability, killed plain carbon steels may be used instead of higher-cost, low alloy steels because compressive residual stresses are formed at the surface of steel parts. The objective of this study was to compare between carburized non-killed AISI 1020 steel samples, which were not modified by Al that were subsequently conventionally and also intensively quenched to determine the effect of quenching on achieving the necessary formation of fine grain size. For comparison, carburized AISI 8620 steel test specimens were conventionally quenched. After quenching, all test specimens were characterized by metallurgical and mechanical analyses. The results of this study showed that when the two quenching methods were compared for carburized non-killed AISI 1020 steel, intensive quenching method was found to be superior with respect to mechanical and metallurgical properties. When comparing the different steels, it was found that intensively quenched, non-killed, AISI 1020 steel yielded grain sizes which were three times greater than those obtained with conventionally quenched, carburized AISI 8620 steel. Therefore, the benefits of intensive quenching were negated. These results show that plain carbon steels must be modified by Al to make fine grains if intensively quenched plain-carbon steel is to replace alloyed AISI 8620 steel.

  16. Peer review of the Three Mile Island Unit 2 Vessel Investigation Project metallurgical examinations

    Energy Technology Data Exchange (ETDEWEB)

    Bohl, R.W.; Gaydos, R.G.; Vander Voort, G.F.; Diercks, D.R. [Argonne National Lab., IL (United States)

    1994-07-01

    Fifteen samples recovered from the lower head of the Three Mile Island (TMI) Unit 2 nuclear reactor pressure vessel were subjected to detailed metallurgical examinations by the Idaho National Engineering Laboratory (INEL), with supporting work carried out by Argonne National Laboratory (ANL) and several of the European participants. These examinations determined that a portion of the lower head, a so-called elliptical ``hot spot`` measuring {approx}0.8 {times} 1 m, reached temperatures as high as 1100{degrees}C during the accident and cooled from these temperatures at {approx}10--100{degrees}C/min. The remainder of the lower head was found to have remained below the ferrite-toaustenite transformation temperature of 727{degrees}C during the accident. Because of the significance of these results and their importance to the overall analysis of the TMI accident, a panel of three outside peer reviewers, Dr. Robert W. Bohl, Mr. Richard G. Gaydos, and Mr. George F. Vander Voort, was formed to conduct an independent review of the metallurgical analyses. After a thorough review of the previous analyses and examination of photo-micrographs and actual lower head specimens, the panel determined that the conclusions resulting from the INEL study were fundamentally correct. In particular, the panel reaffirmed that four lower head samples attained temperatures as high as 1100{degrees}C, and perhaps as high as 1150--1200{degrees}C in one case, during the accident. They concluded that these samples subsequently cooled at a rate of {approx}50--125{degrees}C/min in the temperature range of 600--400{degrees}C, in good agreement with the original analysis. The reviewers also agreed that the remainder of the lower head samples had not exceeded the ferrite-to-austenite transformation temperature during the accident and suggested several refinements and alternative procedures that could have been employed in the original analysis.

  17. Metallurgical Slags as Traces of a 15th century Copper Smelter

    Directory of Open Access Journals (Sweden)

    Garbacz-Klempka A.

    2017-06-01

    Full Text Available The research focuses on assessing the metal content, mainly copper, lead, iron and also silver in metallurgical slag samples from the area where historical metallurgical industry functioned. In the smelter located in Mogiła, near Krakow (southern Poland, whose operation is confirmed in sources from 1469, copper was probably refined as well as silver was separated from copper. Based on the change of chemical and soil phase content and also taking cartographic and historical data into account, considering the restrictions resulting from the modern land use the area was determined whose geochemical mapping can point to the location of the 15th century Jan Thurzo’s smelter in Mogiła near Krakow. Moreover, using the same approach with the samples of this kind here as with hazardous waste, an attempt has been made to assess their impact on the environment. Thereby, taking the geoenvironmental conditions into account, potential impact of the industrial activity has been assessed, which probably left large scale changes in the substratum, manifested in the structure, chemical content and soil phase changes. Discovering areas which are contaminated above the standard value can help to identify historical human activities, and finding the context in artefacts allows to treat geochemical anomalies as a geochronological marker. For this purpose the best are bed sediments, at present buried in the ground, of historical ditches draining the area of the supposed smelter. Correlating their qualities with analogical research of archeologically identified slags and other waste material allows for reconstructing the anthropopressure stages and the evaluation of their effects. The operation of Jan Thurzo’s smelter is significant for the history of mining and metallurgy of Poland and Central and Eastern Europe.

  18. An environmentally-friendly vacuum reduction metallurgical process to recover germanium from coal fly ash

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Lingen; Xu, Zhenming, E-mail: zmxu@sjtu.edu.cn

    2016-07-15

    Highlights: • An environmental friendly vacuum reduction metallurgical process is proposed. • Rare and valuable metal germanium from coal fly ash is recycled. • Residues are not a hazardous material and can be further recycled. • A germanium recovery ratio of 94.64% is obtained in pilot scale experiments. - Abstract: The demand for germanium in the field of semiconductor, electronics, and optical devices is growing rapidly; however, the resources of germanium are scarce worldwide. As a secondary material, coal fly ash could be further recycled to retrieve germanium. Up to now, the conventional processes to recover germanium have two problems as follows: on the one hand, it is difficult to be satisfactory for its economic and environmental effect; on the other hand, the recovery ratio of germanium is not all that could be desired. In this paper, an environmentally-friendly vacuum reduction metallurgical process (VRMP) was proposed to recover germanium from coal fly ash. The results of the laboratory scale experiments indicated that the appropriate parameters were 1173 K and 10 Pa with 10 wt% coke addition for 40 min, and recovery ratio germanium was 93.96%. On the basis of above condition, the pilot scale experiments were utilized to assess the actual effect of VRMP for recovery of germanium with parameter of 1473 K, 1–10 Pa and heating time 40 min, the recovery ratio of germanium reached 94.64%. This process considerably enhances germanium recovery, meanwhile, eliminates much of the water usage and residue secondary pollution compared with other conventional processes.

  19. Heavy Metals and Ni Phytoextractionin in the Metallurgical Area Soils in Elbasan

    Directory of Open Access Journals (Sweden)

    MARILDA OSMANI

    2015-12-01

    Full Text Available The metallurgical complex of Elbasan represents a potential source of the heavy metal pollution, due to the industrial activity conducted before years 1990s. The study focuses in the metallurgical area “Ish-Uzina 12”, which today is used as agricultural land. The aim of this study was to determine the degree of soil contamination by Ni, Co, Pb, Cr and Zn, and to evaluate the phytoextraction potential of nickel hyperaccumulator Alyssum murale. The phytoextraction potential of A. murale is studied through its cultivation in different conditions. The experimental area is divided into three plots; the first in natural conditions, the second with chemical fertilizer Diammonium phosphate and the third with manure. This work showed that the concentrations of heavy metals in plots were respectively: in the first plot, the concentration of Ni was 610 mg/kg, Co 75 mg/kg, Cr 370 mg/kg and Zn 80 mg/kg; in the second Ni was 440 mg/kg, Co 120 mg/kg, Pb 165 mg/kg, Cr 310 mg/kg and Zn 75 mg/kg and in the third Ni was 410 mg/kg, Co 115 mg/kg, Pb 10 mg/kg, Cr 380 mg/kg and Zn 90 mg/kg. Phytoextracted Ni in total harvest reached respectively 1280.9 mg/kg on the first plot, 513.4 mg/kg on the second and 69.1 mg/kg on the third. Based on the results obtained it can be concluded that the soils of this area are contaminated by Nickel and A. murale is a candidate for phytoextraction.

  20. Evaluation of the Fractured Surface of Five Endodontic Rotary Instruments: A Metallurgical Study

    Science.gov (United States)

    Aminsobhani, Mohsen; Khalatbari, Mohamad Saleh; Meraji, Naghmeh; Ghorbanzadeh, Abdollah; Sadri, Ehsan

    2016-01-01

    Introduction: The aim of this study was to compare several metallurgic properties of Neoniti instrument with four other commonly used endodontic rotary files. Methods and Materials: Neoniti A1 (25/0.08), RaCe (25/0.06), Mtwo (25/0.06), Twisted file (25/0.06) and ProTaper Next X2 (25/0.06) were examined by differential scanning calorimetry (DSC) before and after heat treatment at 500°C. X-ray diffraction (XRD) was also performed on the specimens. Furthermore, scanning electron microscopy (SEM) and x-ray energy-dispersive spectrometric (EDS) analyses were carried out on randomly selected fractured files. Results: In SEM tests, dimpled ruptures, characteristic of ductile fracture, were seen in all evaluated cross sections of all files. The SEM results of all evaluated files were alike. EDS results revealed higher proportions of Nickel (Ni) rich intermetallic compounds in Neoniti; whereas, in all the other files the proportion of Titanium (Ti) rich precipitates was higher. DSC results indicated that the temperature present in the oral environment, the austenite phase existed in all files. Mtwo and RaCe files did not show austenite transformation in the temperature range evaluated in this study. Only Neoniti revealed rhombohedal phase (R-phase) transformation. After heat treatment. No significant difference was seen in the transformation temperatures of all evaluated files. XRD evaluations revealed that Neoniti contained both Ni-rich and Ti-rich precipitates. The amount of the martensite phase was higher in ProTaper Next. Conclusion: The metallurgic properties of Neoniti files were different from other evaluated rotary files. This file contained higher proportions of Ni-rich precipitates. PMID:27790257

  1. L2 vs. L3 Initial State: A Comparative Study of the Acquisition of French DPs by Vietnamese Monolinguals and Cantonese-English Bilinguals

    Science.gov (United States)

    Leung, Yan-Kit Ingrid

    2005-01-01

    This paper compares the initial state of second language acquisition (L2A) and third language acquisition (L3A) from the generative linguistics perspective. We examine the acquisition of the Determiner Phrase (DP) by two groups of beginning French learners: an L2 group (native speakers of Vietnamese who do not speak any English) and an L3 group…

  2. Librarian-Initiated Publications Discovery: How Do Digital Depository Librarians Discover and Select Web-Based Government Publications for State Digital Depositories?

    Science.gov (United States)

    Lin, Chi-Shiou; Eschenfelder, Kristin R.

    2010-01-01

    This paper reports on a study of librarian initiated publications discovery (LIPD) in U.S. state digital depository programs using the OCLC Digital Archive to preserve web-based government publications for permanent public access. This paper describes a model of LIPD processes based on empirical investigations of four OCLC DA-based digital…

  3. L2 vs. L3 Initial State: A Comparative Study of the Acquisition of French DPs by Vietnamese Monolinguals and Cantonese-English Bilinguals

    Science.gov (United States)

    Leung, Yan-Kit Ingrid

    2005-01-01

    This paper compares the initial state of second language acquisition (L2A) and third language acquisition (L3A) from the generative linguistics perspective. We examine the acquisition of the Determiner Phrase (DP) by two groups of beginning French learners: an L2 group (native speakers of Vietnamese who do not speak any English) and an L3 group…

  4. Evidence of the Adoption and Implementation of a Statewide Childhood Obesity Prevention Initiative in the New York State WIC Program: The "NY Fit WIC" Process Evaluation

    Science.gov (United States)

    Sekhobo, Jackson P.; Egglefield, Katherine; Edmunds, Lynn S.; Shackman, Gene

    2012-01-01

    Process evaluations are critical in determining whether outcome evaluations are warranted. This study assessed the extent to which a childhood obesity prevention initiative, "NY Fit WIC", was adopted and implemented by the New York State Supplemental Nutrition Program for Women, Infants and Children (WIC). Process data came from…

  5. The Nanomaterial Data Curation Initiative: A Collaborative Approach to Assessing, Evaluating, and Advancing the State of the Field

    Science.gov (United States)

    The Nanomaterial Data Curation Initiative (NDCI) explores the critical aspect of data curation within the development of informatics approaches to understanding nanomaterial behavior. Data repositories and tools for integrating and interrogating complex nanomaterial datasets are...

  6. The Nanomaterial Data Curation Initiative: A Collaborative Approach to Assessing, Evaluating, and Advancing the State of the Field

    Science.gov (United States)

    The Nanomaterial Data Curation Initiative (NDCI) explores the critical aspect of data curation within the development of informatics approaches to understanding nanomaterial behavior. Data repositories and tools for integrating and interrogating complex nanomaterial datasets are...

  7. Curriculum Initiatives in the United States, Germany and Japan for World-Class Education in the 21st Century.

    Science.gov (United States)

    Bieniawski, Z. T.; Bieniawski, Stefan R.

    1996-01-01

    Summarizes a research study performed to assess curriculum changes in engineering education. Discusses the implications of the various curriculum strategies and initiatives and identifies the necessary socio-technological ingredients for world-class education of engineers. (DDR)

  8. Do state traditions matter? Comparing deliberative governance initiatives for climate change adaptation in Dutch corporatism and British pluralism

    NARCIS (Netherlands)

    Vink, M.; Benson, D.; Boezeman, D.F.; Cook, H.; Dewulf, A.; Termeer, C.

    2015-01-01

    In the emerging field of climate adaptation, deliberative governance initiatives are proposed to yield better adaptation strategies. However, introducing these network-centred deliberations between public and private players may contrast with institutionalized traditions of interest intermediation b

  9. Wavelength Dependence of Nanosecond IR Laser-Induced Breakdown in Water: Evidence for Multiphoton Initiation via an Intermediate State

    Science.gov (United States)

    2015-04-29

    breakdown threshold in water for nanosecond (ns) IR laser pulses . Avalanche ionization (AI) is the most powerful mechanism driving IR ns laser-induced...acknowledged that femtosecond (fs) and picosecond (ps) IR breakdown is initiated by photoionization because ultrashort pulses are sufficiently...formation depends critically on the density of pre-existing traps, χtrap. An estimate of χtrap can be obtained by relating the initial quantum efficiency

  10. Correlates of Initiation of Treatment for Chronic Hepatitis C Infection in United States Veterans, 2004-2009.

    Directory of Open Access Journals (Sweden)

    Adi V Gundlapalli

    Full Text Available We describe the rates and predictors of initiation of treatment for chronic hepatitis C (HCV infection in a large cohort of HCV positive Veterans seen in U.S. Department of Veterans Affairs (VA facilities between January 1, 2004 and December 31, 2009. In addition, we identify the relationship between homelessness among these Veterans and treatment initiation. Univariate and multivariable Cox Proportional Hazards regression models with time-varying covariates were used to identify predictors of initiation of treatment with pegylated interferon alpha plus ribavirin. Of the 101,444 HCV treatment-naïve Veterans during the study period, rates of initiation of treatment among homeless and non-homeless Veterans with HCV were low and clinically similar (6.2% vs. 7.4%, p<0.0001. For all U.S. Veterans, being diagnosed with genotype 2 or 3, black or other/unknown race, having Medicare or other insurance increased the risk of treatment. Veterans with age ≥50 years, drug abuse, diabetes, and hemoglobin < 10 g/dL showed lower rates of treatment. Initiation of treatment for HCV in homeless Veterans is low; similar factors predicted initiation of treatment. Additionally, exposure to treatment with medications for diabetes predicted lower rates of treatment. As newer therapies become available for HCV, these results may inform further studies and guide strategies to increase treatment rates in all U.S. Veterans and those who experience homelessness.

  11. Coriolis coupling effects on the initial-state-resolved dynamics of the N(2D)+H2-->NH+H reaction.

    Science.gov (United States)

    Defazio, Paolo; Petrongolo, Carlo

    2007-11-28

    We present Coriolis coupling effects on the initial-state-resolved dynamics of the insertion reaction N((2)D)+H(2)(X (1)Sigma(g) (+))-->NH(X (3)Sigma(-) and a (1)Delta)+H((2)S), without and with nonadiabatic Renner-Teller (RT) interactions between the NH(2) X (2)B(1) and A (2)A(1) electronic states. We report coupled-channel (CC) Hamiltonian matrix elements, which take into account both Coriolis and RT couplings, use the real wave-packet and flux methods for calculating initial-state-resolved reaction probabilities, and contrast CC with centrifugal-sudden (CS) results. Without RT interactions, Coriolis effects are rather small up to J=40, and the CS approximation can be safely employed for calculating initial-state-resolved, integral cross sections. On the other hand, RT effects are associated with rather large Coriolis couplings, mainly near the linearity of NH(2), and the accuracy of the CS approximation thus breaks down at high collision energies, when the reaction starts on the excited A (2)A(1) surface. We also present the CC-RT distribution of the X (3)Sigma(-) and a (1)Delta electronic states of the NH products.

  12. Effects of initial states on the quantum correlation in Bose-Hubbard mo del* Effects of initial states on the quantum correlation in Bose-Hubbard mo del%Bose-Hubbard模型中系统初态对量子关联的影响∗

    Institute of Scientific and Technical Information of China (English)

    郭红

    2015-01-01

    Quantum correlation is an important resource in quantum information, quantum computation, and quantum metrology. Quantum entanglement, Einstein-Podolsky-Rosen (EPR) quantum steering and Bell nonlocality are the major quantum correlations. For quantum entanglement and Bell nonlocality, two subsystems play the same significant roles. EPR quantum steering is stronger than entanglement and weaker than Bell nonlocality. It represents the ability of one subsystem to nonlocally affect another subsystem’s states through local measurements. In this paper, the dynamic quan-tum correlation between the modes in the two-site Bose-Hubbard model is investigated. According to Hillery-Zubairy entanglement criterion and based on maximum mean quantum Fisher information, the influences of initial states on the quantum entanglement evolutions are explored. If the coupling between the modes is much greater than that of the particles at the same site, and the initial states are symmetric or anti-symmetric SU(2) coherent states, the quantum correlations show simple periodic evolutions. The oscillation amplitudes of the evolutions increase with the interaction between the particles at the same site. The oscillation period decreases with the coupling strength between the modes. The dependence of the period on the interaction of the particles at the same site is related to the initial states. In other words, the time evolutions of quantum correlation are closely related to the symmetry of the initial states. In the case of symmetric (anti-symmetric) SU(2) coherent state and repulsive (attractive) interaction of the particles at the same site, the system presents two-way quantum steering. When the subsystem exchange symmetry of the initial states is broken, the collapse and revival of quantum correlation appear, moreover one-way quantum steering emerges in the infancy. One-way quantum steering is asymmetric for two subsystems. So exchange asymmetry of the initial state is necessary

  13. Resonance Raman Intensities Demonstrate that C5 Substituents Affect the Initial Excited-State Structural Dynamics of Uracil More than C6 Substituents.

    Science.gov (United States)

    Teimoory, Faranak; Loppnow, Glen R

    2016-05-04

    Resonance Raman derived initial excited-state structural dynamics provide insight into the photochemical mechanisms of pyrimidine nucleobases, in which the photochemistry appears to be dictated by the C5 and C6 substituents. The absorption and resonance Raman spectra and excitation profiles of 5,6-dideuterouracil were measured to further test this photochemical dependence on the C5 and C6 substituents. The resulting set of excited-state reorganization energies of the observed internal coordinates were calculated and compared to those of other 5- and 6-substituted uracils. The results show that the initial excited-state dynamics along the C5C6 stretch responds to changes in mass at C5 and C6 in the same manner but that the in-plane bends at C5 and C6 are more sensitive to substituents at the C5 position than at the C6 position. In addition, the presence of two deuterium substituents at C5 and C6 decreases the initial excited-state structural dynamics along these in-plane bends, in contrast to what is observed in the presence of two CH3 groups on C5 and C6. The results are discussed in the context of DNA nucleobase photochemistry.

  14. Process of carbothermal self-recovering of disperse Fe-C waste materials of metallurgical production modelling

    Directory of Open Access Journals (Sweden)

    Володимир Олександрович Маслов

    2015-10-01

    Full Text Available Investigation of carbothermic self-recovering kinetics of metallurgical production Fe-C waste materials has been continued in this work for model monodisperse wustite-carbon and magnetite-carbon samples. On the strength of the results of differential thermal analysis the temperature of the beginning of the interaction in polydisperse material was determined. It should be more than 960oC. Kinetic curves of carbothermic self-recovering at 970oC and 1050oC were obtained on monodisperse model samples. During the study of high-temperature processing kinetics of Fe-C waste materials the amount of removed oxygen was determined from the volume and composition of the emitted gas phase. The method comprising simultaneous volume - dynamic and gas analyses was used. Analysis of the results showed that with increase in temperature the maximum rate of oxygen removal was achieved faster and had greater value. Analysis of the gas phase showed that at the initial stage of the process CO content was low over the whole operating temperature range. Then it increased and CO/CO2 ratio remained constant till the experiment was over. The concentration of CO for all temperatures being studied was about 75%, the rest was CO2. It convincingly indicated that the process is out of equilibrium with the gas phase and shifting towards CO2 formation. It was found that the completion of the first stage of the process is characterized by virtually zero magnetic properties of the material, i.e. by obtaining pure wustite. The obtained results confirmed the two-stage scheme of carbothermic process of dispersed Fe-C waste materials self-recovering and its topochemical nature. Studies of electrophysical and magnetic properties of the samples after the carbothermic self-recovering have been made. We found that for the studied materials the value of the specific saturation magnetization keeps growing during the process, reaching 179 A×m2/kg for wustite-carbon sample. The obtained

  15. Criminalistic identification of PGM-containing products of mining and metallurgical companies.

    Science.gov (United States)

    Perelygin, Alexander; Kuchkin, Alexander; Kharkov, Nikolay; Moskvina, Tatyana

    2008-01-15

    In early 1990 s some organized criminal groups started to develop a new field of illegal business, which involved thefts of intermediary products from mining and metal-producing plants in Russia and in the south of Africa. Since local sulfide copper/nickel ores contain certain concentrations of precious and platinum group metals (PGMs), the intermediary products recovered at different stages of metallurgical transformation of these ores are materials of high commercial value. Illicit transportation and refining of these materials in Western Europe and North America has evolved into a large-scale business, where a lot of unlawful revenues are being laundered. The most important tasks in combating this organized crime are as follows: to establish the facts when some PGM-containing semi-products had been received at certain refineries; to carry out the identification of these semi-products; and to prove that these semi-products had been produced by a certain company. As a rule, it is not difficult to establish the identity of a "clean product". However, when a material is a mix of several semi-products or a mix of some semi-product with masking substances, the identification of individual components becomes an extremely complicated task. The purpose of developing the "complex procedure for establishing the nature and source of origin of precious metal-bearing products of mining and metallurgical operations" was to make possible the identification of complex mixes comprised of various metallurgical semi-products. In the complex procedure that we have developed to characterize dispersed materials, distribution of particles by their elemental composition (the so-called "pseudophase" composition) was used instead of mineralogical composition. To determine the "pseudophase" composition by the method of scanning electron microscopy with X-ray spectral microanalysis (SEM-EDX), a representative sample of material containing not less than 1000 particles was analyzed. All

  16. Electromagnetic radiation as a probe of the initial state and of viscous dynamics in relativistic nuclear collisions

    CERN Document Server

    Vujanovic, Gojko; Denicol, Gabriel S; Luzum, Matthew; Jeon, Sangyong; Gale, Charles

    2016-01-01

    The penetrating nature of electromagnetic signals makes them suitable probes to explore the properties of the strongly-interacting medium created in relativistic nuclear collisions. We examine the effects of the initial conditions and shear relaxation time on the spectra and flow coefficients of electromagnetic probes, using an event-by-event 3+1D viscous hydrodynamic simulation (MUSIC).

  17. M-Area and Metallurgical Laboratory Hazardous Waste Management Facilities groundwater monitoring and corrective-action report (U). Third and fourth quarters 1996, Vol. I

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1997-03-01

    This report describes the groundwater monitoring and corrective-action program at the M-Area Hazardous Waste Management Facility (HWMF) and the Metallurgical Laboratory (Met Lab) HWMF at the Savannah River Site (SRS) during 1996.

  18. 11% efficient single-crystal solar cells and 10% efficient polycrystalline cells made from refined metallurgical silicon

    Science.gov (United States)

    Hanoka, J. I.; Strock, H. B.; Kotval, P. S.

    1981-09-01

    The performances of single-crystal and polycrystalline solar cells fabricated from a refined form of low-cost metallurgical silicon are presented. Czochralski-pulled single crystal and cast polycrystalline silicon solar cells with an n on p structure were made from metallurgical silicon processed by Al dissolution followed by Al removal through slagging and directional solidification to obtain material purities in the fractional ppm by weight range. For the single-crystal cells, measurements reveal AM1 efficiencies up to 11.1%, open circuit voltages up to 596 mV and fill factors up to 81%. The cast polycrystalline substrates have yielded cells with efficiencies up to 10.1%, fill factors of 79% and open circuit voltages of 585 mV. The low short circuit current densities are attributed to impurities in the base region in the single-crystal cell, and to grain boundary segregation of impurities and grain boundary recombination in the polycrystalline cells.

  19. THE PROFITABILITY AND LIQUIDITY UNDER THE INFLUENCE OF THE FINANCING POLICY IN THE METALLURGICAL INDUSTRY OF EU 28

    Directory of Open Access Journals (Sweden)

    DOBROTĂ GABRIELA

    2014-12-01

    Full Text Available In the context of the problems of the economic system, the use of the capital and his structure represent important elements in the process of the financial decisions. The aim of this paper is to identify the influence of funding policy on rentability in metallurgical industry, dimensioned with the help of a set of relevant indicators, determined on the base of some aggregated data for a significant sample of very large firms from EU 28. Also, the paper present the situation of liquidity, reflected through the cash- flow and liquidity ratio, in the metallurgical industry of EU 28, being used dates for the period 2004 – 2013, for the mentioned sample. The conclusion of the realised study is that a funding policy well-founded, correlated with the efficient management of expenses and proactive risk management can positively influence the profitability and liquidity.

  20. Influence of metallurgical parameters on the electrochemical behavior of electrodeposited Ni and Ni–W nanocrystalline alloys

    Energy Technology Data Exchange (ETDEWEB)

    Shakibi Nia, N.; Creus, J.; Feaugas, X.; Savall, C., E-mail: csavall@univ-lr.fr

    2016-05-01

    Highlights: • Corrosion behavior of nickel and Ni–W coatings is studied in an acidic medium. • W addition implies grain refinement and other metallurgical parameters variation. • Annealing permitted to separate the W content influence from the grain size. • The W incorporation has an unfavorable effect on the passive film stability. - Abstract: The electrochemical behavior of electrodeposited nickel and Ni–W nanostructured alloys is discussed by studying the polarization curves in acidic medium. As tungsten content varies, several metallurgical parameters that can influence the electrochemical behavior are also modified, namely grain size, nature of grain boundaries, crystallographic texture and light element contamination. Comparing the behavior of Ni–W coatings with that of pure nickel and annealed coatings highlights that tungsten incorporation enhances anodic dissolution and has a detrimental influence on passive film, whereas grain size and grain boundary character behave as second-order parameters.

  1. Effect of glass-ceramic-processing cycle on the metallurgical properties of candidate alloys for actuator housings

    Energy Technology Data Exchange (ETDEWEB)

    Weirick, L.J.

    1982-01-01

    This report summarizes the results from an investigation on the effect of a glass ceramic processing cycle on the metallurgical properties of metal candidates for actuator housings. The cycle consists of a 980/sup 0/C sealing step, a 650/sup 0/C crystallization step and a 475/sup 0/C annealing step. These temperatue excursions are within the same temperature regime as annealing and heat treating processes normally employed for metals. Therefore, the effect of the processing cycle on metallurgical properties of microstructure, strength, hardness and ductility were examined. It was found that metal candidates which are single phase or solid solution alloys (such as 21-6-9, Hastelloy C-276 and Inconel 625) were not affected whereas multiphase or precipitation hardened alloys (such as Inconel 718 and Titanium ..beta..-C) were changed by the processing cycle for the glass ceramic.

  2. Management of Oversea Metallurgical Engineering Project%海外冶金工程项目管理

    Institute of Scientific and Technical Information of China (English)

    王维国; 贾占友

    2013-01-01

      以尼日利亚900 mm 冷连轧生产线安装调试阶段现场管理实践为例,介绍海外冶金工程项目管理中常见问题及解决方法,指出今后在类似国家或地区开展冶金工程项目时应注意的事项。%Taking the management of the erection and commissioning of 900 mm tandem cold mill in Nigeria job site as one example, the paper presents the common problems occurred in the management of oversea metallurgical engineering project and offers the solution, meantime, points out the matters need attention for the management of oversea metallurgical engineering project in analog oversea nation and region for the future.

  3. Correlation of mechanical properties with metallurgical structure for 18Ni 200 grade maraging steel at room and cryogenic temperatures

    Science.gov (United States)

    Wagner, J. A.

    1991-01-01

    An extensive metallurgical study is presented which is intended to explain variations in the mechanical properties of Ni18 200 grade maraging steel in various product forms and orientations. Fracture toughness and Charpy impact values are found to decrease with decreasing temperature and be dependent on product form, specimen orientation, and metallurgical condition. Fatigue crack growth rates are dependent on temperature only. Fractographic analysis reveals that the decrease in toughness at -170 C is not associated with cleavage-type fracture morphology. Those specimens exhibiting low fracture toughness at room temperature or -170 C are found to have a significantly larger number of titanium-rich particles associated with dimple formation on the fracture surface.

  4. On the Schedule Control of Large Metallurgical Construction Engineering Projects%大型冶金建设工程项目进度控制研究

    Institute of Scientific and Technical Information of China (English)

    孙忠林

    2015-01-01

    It has important practical significance for improving the metallurgical construction quality level and controlling construction investment to research the schedule control of large metallurgical construction engineering projects.%研究大型冶金建设工程项目进度控制对提高冶金建设质量水平、控制建设投资具有重要的现实意义。

  5. Geology of the florencia gold – telluride deposit (camagüey, cuba) and some metallurgical considerations

    OpenAIRE

    López K Jesús M.; Moreira Jesús; Gandarillas José

    2011-01-01

    This paper describes the results from a study of the Florencia gold-telluride deposit in Central Cuba, including mineralogical, petrographical, microprobe and chemical analysis. Valuable information is provided for the exploration, mining and processing of gold ores from other nearby deposits with similar characteristics. Results highlight changes in the mineralogical composition of the ores between the north and south sectors of the deposit, as reflected in metallurgical concentrates after b...

  6. Semi-solid metal processing of aluminum alloy A356 and magnesium alloy AZ91: Comparison based on metallurgical consideration

    Energy Technology Data Exchange (ETDEWEB)

    Kleiner, S.; Beffort, O. [Swiss Federal Laboratories for Materials Testing and Research, EMPA Thun, CH-3602 Thun (Switzerland); Ogris, E.; Uggowitzer, P.J. [Institute of Metallurgy, ETH Swiss Federal Institute of Technology, CH-8092 Zuerich (Switzerland)

    2003-09-01

    Thixocasting or rheocasting of AZ and AM magnesium alloys continues to be a problematic case in semi-solid processing. The comparison with the aluminum thixo alloy A356 shows that the metallurgical and physical properties of the Mg alloy AZ91 are little compatible with this technology: The conclusions from this study are of fundamental importance for future developments in this field of research. (Abstract Copyright [2003], Wiley Periodicals, Inc.)

  7. Evaluation of powder metallurgical processing routes for multi-component niobium silicide-based high-temperature alloys

    Energy Technology Data Exchange (ETDEWEB)

    Seemueller, Hans Christoph Maximilian

    2016-03-22

    Niobium silicide-based composites are potential candidates to replace nickel-base superalloys for turbine applications. The goal of this work was to evaluate the feasibility and differences in ensuing properties of various powder metallurgical processing techniques that are capable of manufacturing net-shape turbine components. Two routes for powder production, mechanical alloying and gas atomization were combined with compaction via hot isostatic pressing and powder injection molding.

  8. Early Iron Age gold buttons from South-Western Iberian Peninsula. Identification of a gold metallurgical workshop

    Directory of Open Access Journals (Sweden)

    Monge Soares, António M.

    2010-12-01

    Full Text Available Early Iron Age gold buttons from Castro dos Ratinhos, Fortios and Outeiro da Cabeça were analysed by conventional EDXRF, Micro-PIXE, SEM-EDS and Optical Microscopy. EDXRF results point out to a rather homogeneous alloy composition throughout all the analysed buttons. PIXE microanalyses show that all the button components (disk, tab and peripheral grooved decorated rod have the same alloy composition. PIXE and SEM-EDS microanalyses, supplemented with optical microscopy characterization, show the absence of chemical composition differences between distinct components and joining zones, suggesting that no solder had been applied, i.e. that a partial melting/solid state diffusion process had been used for the welding of button components. Finally, the noticeable similar compositions together with the use of the same welding process and the very similar artefact typologies suggest that those small gold treasures could be interpreted as the result of the work of a single metallurgical workshop, probably located somewhere in the South-Western Iberian Peninsula.

    Botones de oro pertenecientes a la primera Edad del Hierro, procedentes de Castro dos Ratinhos, Fortios e Outeiro da Cabeça (Portugal, fueron analizados por EDXRF y Micro-PIXE. Los resultados de los análisis por EDXRF mostraron una composición similar en todos los botones, independientemente de su procedencia. Por otra parte, los microanálisis por PIXE permitieron verificar que los componentes soldados de cada botón (disco, presilla y cordón exterior tienen la misma composición química. Además de eso, las áreas de soldadura fueron estudiadas mediante Micro-PIXE, SEM-EDS y posterior análisis metalográfico por microscopia óptica de reflexión. Estos análisis permitieron comprobar la ausencia de soldaduras en las zonas de unión de estos componentes, lo que nos permite concluir que debe haber tenido lugar un proceso de fusión parcial y de difusión en estado sólido para unir

  9. The Potential for Elimination of Racial-Ethnic Disparities in HIV Treatment Initiation in the Medicaid Population among 14 Southern States

    OpenAIRE

    Shun Zhang; McGoy, Shanell L.; Daniel Dawes; Mesfin Fransua; George Rust; David Satcher

    2014-01-01

    OBJECTIVES: The purpose of this study was to explore the racial and ethnic disparities in initiation of antiretroviral treatment (ARV treatment or ART) among HIV-infected Medicaid enrollees 18-64 years of age in 14 southern states which have high prevalence of HIV/AIDS and high racial disparities in HIV treatment access and mortality. METHODS: We used Medicaid claims data from 2005 to 2007 for a retrospective cohort study. We compared frequency variances of HIV treatment uptake among persons ...

  10. Set the initial reference state of a team brachytherapy high dose rate; Establecimiento del estado de referencia inicial de un equipo de braquiterapia de alta tasa de dosis

    Energy Technology Data Exchange (ETDEWEB)

    Clemente Gutierrez, F.; Diaz Fuentes, R.; Cabello Murillo, E.; Casa de Julian, M. A. de la; Ferrando Sanchez, A.; Adaimi Hernandez, P.

    2011-07-01

    You have set the initial reference state for a team of high-rate brachytherapy doses according to the recommendations made in the text used as a reference, being always within the functional tolerances established for the team, or the number associated with each test. The team was ready for clinical use under the provisions of Royal Decree 1566/1998 of Quality Control in Radiotherapy.

  11. Feasibility studies to establish at the Kazakhstan Ulba metallurgical plant the manufacturing capability to produce low-enriched uranium certified reference materials

    Energy Technology Data Exchange (ETDEWEB)

    Kuzminski, Jozef [Los Alamos National Laboratory; Nesuhoff, J [NBL; Cratto, P [NBL; Pfennigwerth, G [Y12 NATIONAL SEC. COMPLEX; Mikhailenko, A [ULBA METALLURGICAL PLANT; Maliutina, I [ULBA METALLURGICAL PLANT; Nations, J [GREGG PROTECTION SERVICES

    2009-01-01

    One of the salient features of the transition plan that the United States Department of Energy/National Nuclear Security Administration (DOE/NNSA) is presently implementing in the Former Soviet Union countries is the availability of uranium certified reference materials for calibration of nondestructive assay (NDA) measurement equipment. To address this challenge, DOE/NNSA and U.S. national laboratories have focused their cooperative efforts on establishing a reliable source for manufacturing, certifying, and supplying of such standards. The Ulba Metallurgical Plant (UMP), Kazakhstan, which processes large quantities of low-enriched uranium to produce ceramic fuel pellets for nuclear-powered reactors, is well situated to become a key supplier of low-enriched uranium certified reference materials for the country and Central Asia region. We have recently completed Phase I of a feasibility study to establish at UMP capabilities of manufacturing these standards. In this paper we will discuss details of a proposed methodology for uranium down-blending, material selection and characterization, and a proposed methodology of measurement by destructive (DA) and non-destructive (NDA) analysis to form a database for material certification by the competent State authorities in the Republic of Kazakhstan. In addition, we will discuss the prospect for manufacturing of such standards at UMP.

  12. AmericaView - A State-Based Remote Sensing Initiative Integrating Remote Sensing Data Into Geospatial Education and Applications

    Science.gov (United States)

    Dodge, R. L.; Lawrence, R.

    2007-12-01

    AmericaView (AV) is a national program created to advance the availability, timely distribution, and widespread use of land remote sensing data, especially among users within the university and government communities. Since the 1970s the federal government and private sector have spent billions of dollars on satellite-based earth observing systems, but distribution of data and development of real-world applications have been tough issues for the government and the academic research communities. It has often been hard for researchers to use or even access the data, particularly at smaller schools or research facilities, hindering applied research and current and future workforce development. Many state and local agencies working with applied research programs have not been able to effectively integrate remote sensing data into their geospatial management or decision-support programs. AV addresses these issues through a partnership between the U.S. Geological Survey and the AmericaView Consortium, which is a 501c3 non-profit comprised of university-led, state-based consortia. AmericaView is the federal government's partner in achieving the program vision and goals, which focus both on making data available in usable, cost-effective formats and on helping the university, secondary-education, and public sectors in each state identify, develop, and implement the kinds of remote sensing applications each state needs most. AV is developing applied remote sensing research programs in each of its thirty StateViews. Partner academic institutions are creating internships programs involving students and faculty with applications development, in cooperation with local, state, and federal government agencies. Education and training outreach programs are improving workforce preparation at K-12, post-secondary, and professional levels. Data distribution and sharing infrastructure that leverages funding and avoids duplication is enabling practical archive expansion and distribution

  13. Effect of Hydrogen Addition on Low Temperature Metallurgical Property of Sinter

    Institute of Scientific and Technical Information of China (English)

    MU Lin; JIANG Xin; GAO Qiang-jian; WEI Guo; SHEN Feng-man

    2012-01-01

    Hydrogen-enrich iron making process is certainly to be an effective method to reduce greenhouse gases emission.However,the effect of hydrogen addition on the low temperature metallurgical property of sinter is still unclear.A detailed investigation was performed on the above topic.The results are as follows.When CO is partially replaced by H2,the RDI〈3.15(RDI〈2.8) of sinter decreases with the increase of the H2 content;when the content of H2 increases,the CO,CO2 and N2 decrease proportionally,in this case,RDI〈3.15(RDI〈2.8) of sinter increases with the increase of H2 content;the value of RDI〈3.15(RDI〈2.8) basically depends on the reduction index(Ri).The experimental data of RDI〈2.8 based on Japanese industrial standard(JIS) are a little higher than the data of RDI〈3.15 based on Chinese industrial standard(CIS) in the same condition.In addition,for part of CO is replaced by H2:RDI〈2.8=3.38394+1.1585 RDI〈3.15;for other gases,except H2,are decreased proportionally:RDI〈2.8=17.39678+0.42922 RDI〈3.15

  14. Pyrolysis of chromium rich tanning industrial wastes and utilization of carbonized wastes in metallurgical process.

    Science.gov (United States)

    Tôrres Filho, Artur; Lange, Liséte Celina; de Melo, Gilberto Caldeira Bandeira; Praes, Gustavo Eduardo

    2016-02-01

    Pyrolysis is the thermal degradation of organic material in oxygen-free or very lean oxygen atmosphere. This study evaluates the use of pyrolysis for conversion of leather wastes from chromium tanning processes into Carbonized Leather Residues (CLR), and the utilization of CLR in metallurgical processes through the production of iron ore pellets. CLR was used to replace mineral coal in proportions of 10% and 25% on fixed carbon basis content in the mixtures for pellets preparation. Experimental conversions were performed on a pilot scale pyrolysis plant and a pelletizing reactor of the "pot grate" type. The results demonstrated the technical feasibility of using the charcoal product from animal origin as an energy source, with recovery of up to 76.47% of chromium contained in CLR in the final produced of iron ore pellets. Pellets with 25% replacement of fixed carbon in the coal showed an enhanced compressive strength, with an average value of 344kgfpellet(-1), compared to 300kgfpellet(-1) for standard produced pellets.

  15. The Effects of High Al2O3 on the Metallurgical Properties of Sinter

    Science.gov (United States)

    Yu, Wen-tao; Zuo, Hai-bin; Zhang, Jian-liang; Zhang, Tao

    Sintering-pot tests and metallurgical performances of sinter with 4 kind of different Al2O3 contents are experimented in this paper. Results show: when the Al2O3 contents increase from 2.0% to 3.5%, acicular calcium ferrites in mine phase will be gradually replaced by plate-like iron calcium. The increase of Al2O3 contents will lead to the addition of liquid viscosity and the reduction of permeability of sinter bed. Sintering time will be prolonged. The rate of yield is stable basically but production is low; besides, the increase of liquid viscosity will decrease of drum strength. The change of permeability of the material layer will make RDI+3.15 decrease first and then increase when Al2O3 contents changed from 2.0% to 3.5%. RI of sinter shows a contrary trend because many open voids are formed by deterioration of liquidity first and then pores closed.

  16. Evaluation of Metallurgical Quality of Master Heat IN-713C Nickel Alloy Ingots

    Directory of Open Access Journals (Sweden)

    F. Binczyk

    2012-12-01

    Full Text Available The paper presents the results of evaluation of the metallurgical quality of master heat ingots and of the identification of non-metallic inclusions (oxides of Al., Zr, Hf, Cr, etc., which have been found in the shrinkage cavities formed in these ingots. The inclusions penetrate into the liquid alloy, and on pouring of mould are transferred to the casting, especially when the filtering system is not sufficiently effective. The specific nature of the melting process of nickel and cobalt alloys, carried out in vacuum induction furnaces,excludes the possibility of alloy refining and slag removal from the melt surface. Therefore, to improve the quality of castings (parts of aircraft engines, it is so important to evaluate the quality of ingots before charging them into the crucible of an induction furnace. It has been proved that one of the methods for rapid quality evaluation is an ATD analysis of the sample solidification process, where samples are taken from different areas of the master heat ingot. The evaluation is based on a set of parameters plotted on the graph of the dT/dt derivative curve during the last stage of the solidification process in a range from TEut to Tsol.

  17. Determination of nanoscale particles in the air of working zone at the metallurgical production

    Directory of Open Access Journals (Sweden)

    Т.S. Ulanova

    2015-03-01

    Full Text Available The results of studies of the air of working zone at the metallurgical production on the example of Avisma OJSC (Berezniki, the Perm Territory for the content of nanoscale particles are specified. The maximum nanoparticles concentration in the range of 13523–28609 mln./m3 is determined at the working place of the titanium production smelter with the maximum size of particles of 10–15 nm. At the working place in the administrative building (reference working place the maximum concentration is determined within the range of 524–1000 mln./m3; the maximum size of nanoparticles is 20 nm. It was established that the number concentration of nanoparticles at the reference working places (administration of Avisma OJSC is significantly lower than at the working places of main production processes. The presented studies can be used as the additional factors in the assessment of labor conditions and occupational risk during the manufacture and use of materials containing nanoparticles as well as the production processes with the nanoparticles formation.

  18. The composition and temperature dependence of the sulfide capacity of metallurgical slags

    Science.gov (United States)

    Sosinsky, Nd. J.; Sommerville, I. D.

    1986-06-01

    The concept of optical basicity and its applicability as a means of correlating the available data on the sulfide capacity of metallurgical slags has been reviewed. An excellent correlation based on very extensive data at 1500 °C, which was discussed in a previous paper, is combined with good correlations based on considerably less data at 1550 °C and 1650 °C to quantify the effect of temperature on the sulfide capacity of slags. The combined effects of slag composition and temperature have been expressed in the equation, log C s = [(22690 - 54640A)/7] + 43.6A - 25.2. Use of this equation permits the calculation of the sulfide capacity of a slag at any temperature between 1400 °C and 1700 °C simply from a knowledge of its chemical composition, and can be employed for virtually any oxide slag of interest in the field of iron and steelmaking. This, in turn, permits calculation of the equilibrium distribution of sulfur between this slag and iron or steel, provided that the oxygen potential is known or can be calculated from the degree of deoxidation applied.

  19. Comparative assessment of metallurgical recovery of metals from electronic waste with special emphasis on bioleaching.

    Science.gov (United States)

    Priya, Anshu; Hait, Subrata

    2017-01-14

    Waste electrical and electronic equipment (WEEE) or electronic waste (e-waste) is one of the fastest growing waste streams in the urban environment worldwide. The core component of printed circuit board (PCB) in e-waste contains a complex array of metals in rich quantity, some of which are toxic to the environment and all of which are valuable resources. Therefore, the recycling of e-waste is an important aspect not only from the point of waste treatment but also from the recovery of metals for economic growth. Conventional approaches for recovery of metals from e-waste, viz. pyrometallurgical and hydrometallurgical techniques, are rapid and efficient, but cause secondary pollution and economically unviable. Limitations of the conventional techniques have led to a shift towards biometallurgical technique involving microbiological leaching of metals from e-waste in eco-friendly manner. However, optimization of certain biotic and abiotic factors such as microbial species, pH, temperature, nutrients, and aeration rate affect the bioleaching process and can lead to profitable recovery of metals from e-waste. The present review provides a comprehensive assessment on the metallurgical techniques for recovery of metals from e-waste with special emphasis on bioleaching process and the associated factors.

  20. Filamentous fungi isolated from Brazilian semiarid tolerant to metallurgical industry wastes: an ex situ evaluation

    Directory of Open Access Journals (Sweden)

    Flavio Manoel Rodrigues da Silva Júnior

    2014-10-01

    Full Text Available The purpose of this study was to assess the impact of metallurgical industry wastes on the semiarid soil microbiota using physico-chemical and microbiological parameters, highlighting the filamentous fungi assembly. Soil samples were collected in an area of industrial waste deposit contaminated with lead and mixed with natural soil (control soil in seven different concentrations (0, 7.5, 15, 30, 45, 60 and 100%. The results showed alterations on the physico-chemical properties of the soil treated with industrial wastes, with a gradate increase of the soil's pH (5.6-10.4 and electrical conductivity (0.3-14.7 dS m-1 and also reduction of organic matter (7.0-1.8%. The use of microbiological parameters (fungal richness and diversity, CO2emission, and the carbon on the microbial biomass enabled the identification of alterations on the microbial community due to stress caused by the exposure to industrial wastes, despite the presence of Thielavia, Chaetomium and Aspergillus tolerant to high concentrations of the scoria. Therefore, these filamentous fungi could be used in biomonitoring and bioremediation studies in the soils contaminated by industrial wastes.

  1. Production of highly porous glass-ceramics from metallurgical slag, fly ash and waste glass

    Directory of Open Access Journals (Sweden)

    Mangutova Bianka V.

    2004-01-01

    Full Text Available Glass-ceramics composites were produced based on fly-ash obtained from coal power stations, metallurgical slag from ferronickel industry and waste glass from TV monitors, windows and flasks. Using 50% waste flask glass in combination with fly ash and 20% waste glass from TV screens in combination with slag, E-modulus and bending strength values of the designed systems are increased (system based on fly ash: E-modulus from 6 to 29 GPa, and bending strength from 9 to 75 MPa. The polyurethane foam was used as a pore creator which gave the material porosity of 70(5% (fly ash-glass composite and a porosity of 65( 5% (slag-glass composite. E-modulus values of the designed porous systems were 3.5(1.2 GPa and 8.1(3 GPa, while the bending strength values were 6.0(2 MPa and 13.2(3.5 MPa, respectively. These materials could be used for the production of tiles, wall bricks, as well as for the construction of air diffusers for waste water aeration.

  2. Microstructure, cytotoxicity and corrosion of powder-metallurgical iron alloys for biodegradable bone replacement materials

    Energy Technology Data Exchange (ETDEWEB)

    Wegener, Bernd; Sievers, Birte; Utzschneider, Sandra; Mueller, Peter; Jansson, Volkmar [Department of Orthopedic Surgery, Ludwig-Maximilians-University of Munich, Marchioninistrasse 15, 81377 Muenchen (Germany); Roessler, Sophie; Nies, Berthold [InnoTERE GmbH, Tatzberg 47, 01307 Dresden (Germany); Stephani, Guenter; Kieback, Bernd [Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Dresden Branch Lab, Winterbergstrasse 28, 01277 Dresden (Germany); Quadbeck, Peter, E-mail: peter.quadbeck@ifam-dd.fraunhofer.de [Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Dresden Branch Lab, Winterbergstrasse 28, 01277 Dresden (Germany)

    2011-12-15

    Up to now biodegradable bone implants with the ability of bearing high loads for the temporary replacement of bones or as osteosynthesis material are not available. Iron and iron based alloys have been identified as appropriate materials, since they combine high strength at medium corrosion rates. Thus, the aim of the present study is the development of a degradable iron based alloy with the perspective of using them as matrix material of cellular structures with biomechanical tailored properties. A powder metallurgical approach has been used to manufacture Fe-C, Fe-0.6P, Fe-1.6P, Fe-B and Fe-Ag samples, which have been tested with respect to their microstructure, their cytotoxicity, and their degradation rate. In order to determine the cytotoxicity of the material a monolayer culture of fibroblast and a perfusion chamber system has been chosen, which was recommended by the ISO 10993-5:1999 for biological testing of medical devices. It has been found, that in particular phosphorus features beneficial properties, since density and thus the strength of the material are increased. No corrosion inhibiting effects of phosphorus on the degradation rate have been found.

  3. EDXRF and micro-EDXRF studies of Late Bronze Age metallurgical productions from Canedotes (Portugal)

    Science.gov (United States)

    Valerio, Pedro; Araújo, M. de Fátima; Canha, Alexandre

    2007-10-01

    Metallurgical production in Central Portugal during the Late Bronze Age was primarily based on copper-tin alloys, despite influences from the Atlantic area where copper-tin-lead alloys are common. Metallic artefacts from archaeological site of Canedotes (Central Portugal) were analysed by EDXRF to establish the type of alloys present. Polished spots in selected artefacts were also analysed by micro-EDXRF to determine the major and minor elemental composition of the original alloys. The collection constitutes 18 copper-tin artefacts and one unalloyed copper artefact with tin and arsenic as minor constituents. Artefacts that require a thermomechanical finishing process, such as tools and weapons, seem to have improved control over the tin content. The composition of two buttons, one cramp and one metallic droplet suggest that some of the copper sources were rich in arsenic. Finally, the low iron content of the artefacts seems to agree well with the smelting of copper ores in crucible furnaces, a smelting process used in certain areas of the Iberian Peninsula until pre-Roman times.

  4. Simulation of Tailored Tempering with a Thermo-Mechanical-Metallurgical Model in AutoFormplus

    Science.gov (United States)

    Ertürk, S.; Sester, M.; Selig, M.; Feuser, P.; Roll, K.

    2011-08-01

    For automotive applications, the hot stamping of ultra-high-strength steels such as 22MnB5 is a well-established process providing significant reduction of fuel consumption and improving the component strength and geometrical accuracy due to reduced springback. Tailored tempering is a special type of hot stamping, in which different areas of the component experience different cooling histories leading to different final properties. The potential of manufacturing-optimised components consisting of high-strength and high-ductility regions in harmony with an enhanced crash performance makes tailored tempering very attractive compared with other conventional hot stamping processes. The optimisation of this process, where deformation and cooling take place simultaneously, requires a complete understanding in terms of material behaviour, formability, heat transfer and phase transformation kinetics. To this end, a thermo-mechanical-metallurgical model has been implemented in AutoFormplus in order to capture the material behaviour during the forming and quenching processes. Both radiation and convection are taken into account to describe heat transfer to ambient. Moreover, latent heat is considered and its effect on simulation is discussed. A guideline for parameter identification strategy has been developed and validated by separate experiments. The simulation results of tailored tempering of a B-pillar are presented together with measured tensile strength and elongation at fracture.

  5. Post-hoc Analysis on the R&D Capabilities of Chemical and Metallurgical Manufacturing

    Directory of Open Access Journals (Sweden)

    Herman Shah Anuar

    2013-09-01

    Full Text Available The purpose of this paper is to evaluate how internal R&D, external R&D, and patenting affects the behavior of foreign, local, and joint-venture companies operating in manufacturing companies in Malaysia. Different types of manufacturing companies may have different approach in applying their R&D capabilities and patenting activity. The construct of this paper is based on the post-hoc analysis in evaluating how internal R&D, external R&D, and patenting affects the behavior of foreign, local, and joint-venture companies operating in manufacturing companies. This research was conducted using survey questionnaires. 124 companies in chemical and metallurgical manufacturing companies participated in this survey. It was indicated that these three companies behave differently when dealing with internal R&D, external R&D, and patenting. It can be concluded that these three types of companies have a different perspective on applying internal R&D, external R&D, and patenting which is based on their different business strategic direction. It is suggested that in the near future, researchers should concentrate and other types of manufacturing companies or they can involve more sample size in getting better generalization on the behavior of these companies.

  6. Metallurgical Laboratory Hazardous Waste Management Facility groundwater monitoring report. Third quarter, 1994

    Energy Technology Data Exchange (ETDEWEB)

    1994-12-01

    During third quarter 1994, samples from AMB groundwater monitoring wells at the Metallurgical Laboratory Hazardous Waste Management Facility (Met Lab HWMF) were analyzed for selected heavy metals, indicator parameters, radionuclides, volatile organic compounds, and other constituents. Eight parameters exceeded standards during the quarter. As in previous quarters, tetrachloroethylene and trichloroethylene exceeded final Primary Drinking Water Standards (PDWS). Bis(2-ethylhexyl) phthalate exceeded final PDWS in one well. Aluminum, iron, manganese, tin, and total organic halogens exceeded the Savannah River Site (SRS) Flag 2 criteria. Groundwater flow direction and rate in the M-Area Aquifer Zone were similar to previous quarters. Conditions affecting determination of groundwater flow directions and rates in the Upper Lost Lake Aquifer Zone, Lower Lost Lake Aquifer Zone, and the Middle Sand Aquifer Zone of the Crouch Branch Confining Unit were also similar to previous quarters. During second quarter 1994, SRS received South Carolina Department of Health and Environmental Control approval for constructing five point-of-compliance wells and two plume definition wells near the Met Lab HWMF. This project began in July 1994 and is complete; however, analytical data from these wells is not available yet.

  7. Alloying effects on mechanical and metallurgical properties of NiAl

    Energy Technology Data Exchange (ETDEWEB)

    Liu, C.T.; Horton, J.A.; Lee, E.H.; George, E.P.

    1993-06-01

    Alloying effects were investigated in near-stoichiometric NiAl for improving its mechanical and metallurgical properties. Ternary additions of 19 elements at levels up to 10 at. % were added to NiAl; among them, molybdenum is found to be most effective in improving the room-temperature ductility and high-temperature strength. Alloying with 1.0 {plus_minus} 0.6% molybdenum almost doubles the room-temperature tensile ductility of NiAl and triples its yield strength at 1000C. The creep properties of molybdenum-modified NiAl alloys can be dramatically improved by alloying with up to 1% of niobium or tantalum. Because of the low solubilities of molybdenum and niobium in NiAl, the beneficial effects mainly come from precipitation hardening. Fine and coarse precipitates are revealed by both transmission electron microscopy (TEM) and electron microprobe analyses. Molybdenum-containing alloys possess excellent oxidation resistance and can be fabricated into rod stock by hot extrusion at 900 to 1050C. This study of alloying effects provides a critical input for the alloy design of ductile and strong NiAl aluminide alloys for high-temperature structural applications.

  8. Metallurgical investigation on fourth century BCE silver jewellery of two hoards from Samaria

    Science.gov (United States)

    Ashkenazi, D.; Gitler, H.; Stern, A.; Tal, O.

    2017-01-01

    A fourth century BCE silver jewellery collection, which is part of two hoards of Samarian coins (the Samaria and Nablus Hoards), was studied by non-destructive analyses. The collection, which consists of pendants, rings, beads and earrings, had been examined by visual testing, multi-focal microscopy and SEM-EDS analysis. In order to enhance our knowledge of past technologies of silver jewellery production, we developed a metallurgical methodology based on the chemical composition of the joints and bulk. The results show that all artefacts are made of silver containing a small percentage of copper. Higher copper concentrations were measured in the joining regions. Our research indicates that the manufacturing of the jewellery from both hoards involved similar techniques, including casting, cutting, hammering, bending, granulating and joining methods, indicating that the artefacts were made by trained silversmiths. Although the burial date of the Samaria Hoard – 352 BCE – is some 21 years earlier than that of the Nablus Hoard – circa 331 BCE, a noted continuity in the local production technology is apparent in the analysed items. This information provides better understanding of the technological abilities in the late Persian-period province of Samaria and bears implications on the local silver coins produced in the region.

  9. Evaluation of Metallurgical Quality of Master Heat IN-713C Nickel Alloy Ingots

    Directory of Open Access Journals (Sweden)

    Binczyk F.

    2012-12-01

    Full Text Available The paper presents the results of evaluation of the metallurgical quality of master heat ingots and of the identification of non-metallic inclusions (oxides of Al., Zr, Hf, Cr, etc., which have been found in the shrinkage cavities formed in these ingots. The inclusions penetrate into the liquid alloy, and on pouring of mould are transferred to the casting, especially when the filtering system is not sufficiently effective. The specific nature of the melting process of nickel and cobalt alloys, carried out in vacuum induction furnaces, excludes the possibility of alloy refining and slag removal from the melt surface. Therefore, to improve the quality of castings (parts of aircraft engines, it is so important to evaluate the quality of ingots before charging them into the crucible of an induction furnace. It has been proved that one of the methods for rapid quality evaluation is an ATD analysis of the sample solidification process, where samples are taken from different areas of the master heat ingot. The evaluation is based on a set of parameters plotted on the graph of the dT/dt derivative curve during the last stage of the solidification process in a range from TEut to Tsol.

  10. Technogenic metallurgical resources raw potential usage under conditions of the zinc industry modernization

    Directory of Open Access Journals (Sweden)

    Leopold Igorevich Leontiev

    2016-07-01

    Full Text Available The article deals with the problem of accumulation and usage oftechnogenic metallurgical resources in the regions where the largeststeel plants are accommodated. The features of exploration anddevelopment of the mineral potential of technogenic metallurgicalresources are presented through the introduction of technologies ofdeep complex processing of technogenic raw materials. The topicalityof technogenic raw materials usage to expand the mineral resource baseof zinc producers in Russia is substantiated. The prospects of thezinc industry in terms of development of raw conversion by usingtechnological resources are explored. A methodical approach toevaluating the effectiveness of the usage of technogenic metallurgicalraw materials is developed. Approaches to establish the price oftechnogenic raw materials are determined; the expediency of increasingenvironmental charges for waste disposal is highlighted.Methodological developments are tested to assess the effectiveness of the usage of technogenic waste products made by ferrous metallurgyplants in Russia as a raw material for zinc production. There are set of the prioritiesfor the usage of raw potential of the technogenic resources todevelop the zinc industry.

  11. Mechanical and Metallurgical Evolution of Stainless Steel 321 in a Multi-step Forming Process

    Science.gov (United States)

    Anderson, M.; Bridier, F.; Gholipour, J.; Jahazi, M.; Wanjara, P.; Bocher, P.; Savoie, J.

    2016-04-01

    This paper examines the metallurgical evolution of AISI Stainless Steel 321 (SS 321) during multi-step forming, a process that involves cycles of deformation with intermediate heat treatment steps. The multi-step forming process was simulated by implementing interrupted uniaxial tensile testing experiments. Evolution of the mechanical properties as well as the microstructural features, such as twins and textures of the austenite and martensite phases, was studied as a function of the multi-step forming process. The characteristics of the Strain-Induced Martensite (SIM) were also documented for each deformation step and intermediate stress relief heat treatment. The results indicated that the intermediate heat treatments considerably increased the formability of SS 321. Texture analysis showed that the effect of the intermediate heat treatment on the austenite was minor and led to partial recrystallization, while deformation was observed to reinforce the crystallographic texture of austenite. For the SIM, an Olson-Cohen equation type was identified to analytically predict its formation during the multi-step forming process. The generated SIM was textured and weakened with increasing deformation.

  12. Process of optimization of district heat production by utilizing waste energy from metallurgical processes

    Science.gov (United States)

    Konovšek, Damjan; Fužir, Miran; Slatinek, Matic; Šepul, Tanja; Plesnik, Kristijan; Lečnik, Samo

    2017-07-01

    In a consortium with SIJ (Slovenian Steel Group), Metal Ravne, the local community of Ravne na Koro\\vskem and the public research Institut Jožef Stefan, with its registered office in Slovenia, Petrol Energetika, d.o.o. set up a technical and technological platform of an innovative energy case for a transition of steel industry into circular economy with a complete energy solution called »Utilization of Waste Heat from Metallurgical Processes for District Heating of Ravne na Koro\\vskem. This is the first such project designed for a useful utilization of waste heat in steel industry which uses modern technology and innovative system solutions for an integration of a smart, efficient and sustainable heating and cooling system and which shows a growth potential. This will allow the industry and cities to make energy savings, to improve the quality of air and to increase the benefits for the society we live in. On the basis of circular economy, we designed a target-oriented co-operation of economy, local community and public research institute to produce new business models where end consumers are put into the centre. This innovation opens the door for steel industry and local community to a joint aim that is a transition into efficient low-carbon energy systems which are based on involvement of natural local conditions, renewable energy sources, the use of waste heat and with respect for the principles of sustainable development.

  13. A CFD study on the dust behaviour in a metallurgical waste-heat boiler

    Energy Technology Data Exchange (ETDEWEB)

    Yang Yongxiang; Jokilaakso, A. [Helsinki Univ. of Technology, Otaniemi (Finland). Lab. of Materials Processing and Powder Metallurgy

    1997-12-31

    A waste-heat boiler forms an essential part for the treatment of high temperature flue-gases in most metallurgical processes. Flue-dust carried by the furnace off-gas has to be captured efficiently in the waste-heat boilers before entering the downstream gas purification equipment. Flue dust may accumulate and foul on the heat transfer surfaces such as tube-walls, narrow conjunctions between the boiler and the furnace uptake, and thus may cause smelter shutdown, and interrupt the production. A commercial CFD package is used as the major tool on modelling the dust flow and settling in the waste-heat boiler of an industrial copper flash smelter. In the presentation, dust settling behaviour is illustrated for a wide range of particle sizes, and dust capture efficiency in the radiation section of the boiler for different particle sizes has been shown with the transient simulation. The simulation aims at providing detailed information of dust behaviour in the waste-heat boiler in sulphide smelting. (author) 11 refs.

  14. Performance Analysis of a Grid-Connected Upgraded Metallurgical Grade Silicon Photovoltaic System

    Directory of Open Access Journals (Sweden)

    Chao Huang

    2016-05-01

    Full Text Available Because of their low cost, photovoltaic (PV cells made from upgraded metallurgical grade silicon (UMG-Si are a promising alternative to conventional solar grade silicon-based PV cells. This study investigates the outdoor performance of a 1.26 kW grid-connected UMG-Si PV system over five years, reporting the energy yields and performance ratio and estimating the long-term performance degradation rate. To make this investigation more meaningful, the performance of a mono-Si PV system installed at the same place and studied during the same period of time is presented for reference. Furthermore, this study systematizes and rationalizes the necessity of a data selection and filtering process to improve the accuracy of degradation rate estimation. The impact of plane-of-array irradiation threshold for data filtering on performance ratio and degradation rate is also studied. The UMG-Si PV system’s monthly performance ratio after data filtering ranged from 84% to 93% over the observation period. The annual degradation rate was 0.44% derived from time series of monthly performance ratio using the classical decomposition method. A comparison of performance ratio and degradation rate to conventional crystalline silicon-based PV systems suggests that performance of the UMG-Si PV system is comparable to that of conventional systems.

  15. Proper Assessment of the JFK Assassination Bullet Lead Evidence from Metallurgical and Statistical Perspectives

    Energy Technology Data Exchange (ETDEWEB)

    Randich, E; Grant, P M

    2006-08-29

    The bullet evidence in the JFK assassination investigation was reexamined from metallurgical and statistical standpoints. The questioned specimens are comprised of soft lead, possibly from full-metal-jacketed Mannlicher-Carcano, 6.5-mm ammunition. During lead refining, contaminant elements are removed to specified levels for a desired alloy or composition. Microsegregation of trace and minor elements during lead casting and processing can account for the experimental variabilities measured in various evidentiary and comparison samples by laboratory analysts. Thus, elevated concentrations of antimony and copper at crystallographic grain boundaries, the widely varying sizes of grains in Mannlicher-Carcano bullet lead, and the 5-60 mg bullet samples analyzed for assassination intelligence effectively resulted in operational sampling error for the analyses. This deficiency was not considered in the original data interpretation and resulted in an invalid conclusion in favor of the single-bullet theory of the assassination. Alternate statistical calculations, based on the historic analytical data, incorporating weighted averaging and propagation of experimental uncertainties also considerably weaken support for the single-bullet theory. In effect, this assessment of the material composition of the lead specimens from the assassination concludes that the extant evidence is consistent with any number between two and five rounds fired in Dealey Plaza during the shooting.

  16. Manufacturing of self-passivating tungsten based alloys by different powder metallurgical routes

    Science.gov (United States)

    Calvo, A.; Ordás, N.; Iturriza, I.; Pastor, J. Y.; Tejado, E.; Palacios, T.; García-Rosales, C.

    2016-02-01

    Self-passivating tungsten based alloys will provide a major safety advantage compared to pure tungsten when used as first wall armor of future fusion reactors, due to the formation of a protective oxide layer which prevents the formation of volatile and radioactive WO3 in case of a loss of coolant accident with simultaneous air ingress. Bulk WCr10Ti2 alloys were manufactured by two different powder metallurgical routes: (1) mechanical alloying (MA) followed by hot isostatic pressing (HIP) of metallic capsules, and (2) MA, compaction, pressureless sintering in H2 and subsequent HIPing without encapsulation. Both routes resulted in fully dense materials with homogeneous microstructure and grain sizes of 300 nm and 1 μm, respectively. The content of impurities remained unchanged after HIP, but it increased after sintering due to binder residue. It was not possible to produce large samples by route (2) due to difficulties in the uniaxial compaction stage. Flexural strength and fracture toughness measured on samples produced by route (1) revealed a ductile-to-brittle-transition temperature (DBTT) of about 950 °C. The strength increased from room temperature to 800 °C, decreasing significantly in the plastic region. An increase of fracture toughness is observed around the DBTT.

  17. Proper assessment of the JFK assassination bullet lead evidence from metallurgical and statistical perspectives.

    Science.gov (United States)

    Randich, Erik; Grant, Patrick M

    2006-07-01

    The bullet evidence in the JFK assassination investigation was reexamined from metallurgical and statistical standpoints. The questioned specimens are comprised of soft lead, possibly from full-metal-jacketed Mannlicher-Carcano (MC), 6.5-mm ammunition. During lead refining, contaminant elements are removed to specified levels for a desired alloy or composition. Microsegregation of trace and minor elements during lead casting and processing can account for the experimental variabilities measured in various evidentiary and comparison samples by laboratory analysts. Thus, elevated concentrations of antimony and copper at crystallographic grain boundaries, the widely varying sizes of grains in MC bullet lead, and the 5-60 mg bullet samples analyzed for assassination intelligence effectively resulted in operational sampling error for the analyses. This deficiency was not considered in the original data interpretation and resulted in an invalid conclusion in favor of the single-bullet theory of the assassination. Alternate statistical calculations, based on the historic analytical data, incorporating weighted averaging and propagation of experimental uncertainties also considerably weaken support for the single-bullet theory. In effect, this assessment of the material composition of the lead specimens from the assassination concludes that the extant evidence is consistent with any number between two and five rounds fired in Dealey Plaza during the shooting.

  18. Synergetic use of lignite fly ash and metallurgical converter slag in geopolymer concrete

    Directory of Open Access Journals (Sweden)

    Gábor Mucsi

    2014-08-01

    Full Text Available The application and utilization of the industrial wastes and by-products in the construction industry is a key issue from an environmental and economic point of view. The increased use of lignite has substantially increased the available quantities of lignite fired power plant fly ash, which can be mainly classified as class C fly ash. The utilization of such raw material however has some difficulties. In the present paper lignite fired power station fly ash and metallurgical converter slag were used for the production of geopolymer concrete. The fly ash was used as a geopolymer based binder material, and a converter slag as aggregate, thus created a geopolymer concrete which contains mainly industrial wastes. As preliminary test experimental series were carried out using andesite as aggregate. The optimal aggregate/binder ratio was determined. The effect of the amount of alkaline activator solution in the binder, the aggregate type on the geopolymer concretes’ compressive strength and density was investigated. Furthermore, the physical properties - freeze-thaw resistance and particle size distribution - of the applied aggregates were measured as well. As a result of the experiments it was found that physical properties of the andesite and converter slag aggregate was close. Therefore andesite can be replaced by converter slag in the concrete mixture. Additionally, geopolymer concrete with nearly 20 MPa compressive strength was produced from class C fly ash and converter slag.

  19. OMERACT/OARSI initiative to define states of severity and indication for joint replacement in hip and knee osteoarthritis

    DEFF Research Database (Denmark)

    Gossec, Laure; Hawker, Gillian; Davis, Aileen M

    2007-01-01

    OBJECTIVE: Time to theoretical indication of joint replacement surgery has been proposed as a primary outcome for potential structure-modifying interventions for osteoarthritis (OA). The objectives of this OMERACT/OARSI Working Group were to identify pain, physical function, and structure states ...

  20. A Professional Learning Community for the New Teacher Professionalism: The Case of a State-Led Initiative in Singapore Schools

    Science.gov (United States)

    Lee, Daphnee; Lee, Wing On

    2013-01-01

    This paper seeks to explore the empirical fit of two PLC models, using Singapore as a case. Insights emerged from documentary analyses and interviews with state-affiliated agents from the Academy of Singapore Teachers. The proposed DuFour--Fullan model, despite policy aspirations, remains largely DuFour-predominant in practice. Aspirations for a…