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Sample records for hele hammer ivo

  1. Koolitamine : andmisrõõm või edevus? / Ants Vasar, Arne Kaasik, Hele Hammer

    Index Scriptorium Estoniae

    Vasar, Ants

    2007-01-01

    Küsimusele, miks olete hakanud ettevõtjana koolitajaks, vastavad ASi Viru Keskus juhatuse liige Ants Vasar, Columbus IT Partner Eesti ASi pertner ja nõukogu esimees Arne Kaasik ja Amserv Grupi finantsdirektor Hele Hammer

  2. IVO`s CHP know-how: experience, inventions, patents

    Energy Technology Data Exchange (ETDEWEB)

    Aeijaelae, M.; Ohtonen, V. [ed.

    1997-11-01

    IVO can justly claim mastery in the co-generation of district heat and electricity - CHP. As well as looking at the issue from the viewpoint of planners, builders and operators, IVO`s engineers also view power plants through the eyes of the product developer and inventor. This approach has resulted in successful power plant configurations, inventions and patents and visions

  3. Hele Hammer : hea finantsjuht käib teooriatest ees / Hele Hammer

    Index Scriptorium Estoniae

    Hammer, Hele

    2006-01-01

    Ilmunud ka: Finansovõi Menedzhment : infovõpusk nr. 1 veebr. lk. 18-19. Amserv Grupi finantsjuht ja EBS-i finantsjuhtimise õppejõud teoreetiliste teadmiste rollist õigete finantsotsuste tegemisel

  4. E-supply chains : competitive advantage? / Hele Hammer

    Index Scriptorium Estoniae

    Hammer, Hele

    2001-01-01

    Kaanel ajak. ilmumisaeg Winter 2001/2002. Autor tutvustab tarneteketi efektiivse juhtimise meetodeid Continuous Replenishment Program (CRP) ja Vendor Managed Inventory (VMI). Uus tehnoloogia on oluline uue äristrateegia juurutamisel

  5. E-supply chains : competitive advantage? / Hele Hammer

    Index Scriptorium Estoniae

    Hammer, Hele

    2002-01-01

    Kaanel ajak. ilmumisaeg 2001/2002. Autor tutvustab tarneteketi efektiivse juhtimise meetodeid Continuous Replenishment Program (CRP) ja Vendor Managed Inventory (VMI). Uus tehnoloogia on oluline uue äristrateegia juurutamisel

  6. Condensation driven water hammer studies for feedwater distribution pipe

    Energy Technology Data Exchange (ETDEWEB)

    Savolainen, S.; Katajala, S.; Elsing, B.; Nurkkala, P.; Hoikkanen, J. [Imatran Voima Oy, Vantaa (Finland); Pullinen, J. [IVO Power Engineering Ltd., Vantaa (Finland); Logvinov, S.A.; Trunov, N.B.; Sitnik, J.K. [EDO Gidropress (Russian Federation)

    1997-12-31

    Imatran Voima Oy, IVO, operates two VVER 440 reactors. Unit 1 has been operating since 1977 and unit 2 since 1981. First damages of the feed water distribution (FWD) pipes were observed in 1989. In closer examinations FWD-pipe T-connection turned out to suffer from severe erosion corrosion damages. Similar damages have been found also in other VVER 440 type NPPs. In 1994 the first new FWD-pipe was replaced and in 1996 extensive water hammer experiments were carried out together with EDO Gidropress in Podolsk. After the first phase of the experiments some fundamental changes were made to the construction of the FWD-pipe. The object of this paper is to give short insight to the design of the new FWD-pipe concentrating on water hammer experiments. (orig.).

  7. Ultrasonic rotary-hammer drill

    Science.gov (United States)

    Bar-Cohen, Yoseph (Inventor); Badescu, Mircea (Inventor); Sherrit, Stewart (Inventor); Bao, Xiaoqi (Inventor); Kassab, Steve (Inventor)

    2010-01-01

    A mechanism for drilling or coring by a combination of sonic hammering and rotation. The drill includes a hammering section with a set of preload weights mounted atop a hammering actuator and an axial passage through the hammering section. In addition, a rotary section includes a motor coupled to a drive shaft that traverses the axial passage through the hammering section. A drill bit is coupled to the drive shaft for drilling by a combination of sonic hammering and rotation. The drill bit includes a fluted shaft leading to a distal crown cutter with teeth. The bit penetrates sampled media by repeated hammering action. In addition, the bit is rotated. As it rotates the fluted bit carries powdered cuttings helically upward along the side of the bit to the surface.

  8. Ivo Andrić a Cracovia

    OpenAIRE

    Alessandro Ajres

    2011-01-01

    The work concerns the (short) period lived by Ivo Andrić in Krakow in 1914, after his stayin Wien and before coming back to Sarajevo. During a few months in Krakow, Andrić writes threeinteresting essays about Krakow, its art and its artists. Andrić faces art from the past (Wawel, the RoyalCastle) and contemporary art (works by the youngest Polish artists). His judgments are always accurate,in particular about contemporary Polish art, even considering the judgments by the latest art historians...

  9. Energy Innovation. IVO Group`s Research and Development Report

    Energy Technology Data Exchange (ETDEWEB)

    Salminen, P.; Laiho, Y.; Kaikkonen, H.; Leisio, C.; Hinkkanen, S. [eds.

    1996-11-01

    This annual booklet of the IVO Group`s research and development activities presents a number of articles, written by experts from IVO. The products described are examples of the environmentally-oriented selection made available by the IVO Group. In fact, the entire energy technology developed in Finland is environmentally oriented, if seen from the international perspective. The new business potential of environmental technology is great, and it is believed that in the year 2000, exportation of Finnish know-how in the field of energy-saving and efficiency will exceed the value of out energy imports

  10. Energy Innovation. IVO group`s research and development report

    Energy Technology Data Exchange (ETDEWEB)

    Salminen, P.; Laiho, Y.; Kaikkonen, H.; Leisio, C.; Hinkkanen, S.; Fletcher, R. [eds.

    1997-11-01

    This annual booklet of the IVO Group`s research and development activities presents a number of articles, written by experts from IVO. The products described are examples of the environmentally-oriented selection made available by the IVO Group. In fact, the entire energy technology developed in Finland is environmentally oriented, if seen from the international perspective. The new business potential of environmental technology is great, and it is believed that in the year 2000, exportation of Finnish know-how in the field of energy-saving and efficiency will exceed the value of out energy imports

  11. Hammering towards QED

    Directory of Open Access Journals (Sweden)

    Jasmin C. Blanchette

    2016-01-01

    Full Text Available This paper surveys the emerging methods to automate reasoning over large libraries developed with formal proof assistants. We call these methods hammers. They give the authors of formal proofs a strong "one-stroke" tool for discharging difficult lemmas without the need for careful and detailed manual programming of proof search.The main ingredients underlying this approach are efficient automatic theorem provers that can cope with hundreds of axioms, suitable translations of richer logics to their formalisms, heuristic and learning methods that select relevant facts from large libraries, and methods that reconstruct the automatically found proofs inside the proof assistants.We outline the history of these methods, explain the main issues and techniques, and show their strength on several large benchmarks. We also discuss the relation of this technology to the QED Manifesto and consider its implications for QED-style efforts.

  12. Hele Everaus : Eesti meditsiin on patsiendi vastu hoolimatu / Hele Everaus ; interv. Kärt Anvelt

    Index Scriptorium Estoniae

    Everaus, Hele, 1953-

    2008-01-01

    Vt. ka vesti Dnja 23. sept., lk. 5. Esimesena Eesti tipparstidest väljendab Hele Everaus karmi tõde, et meie tervishoiukorraldus on patsiendikesksusest kaugel. Pool aastat tagasi avas dr Everaus Tallinnas vähikliiniku

  13. Volpentest HAMMER Federal Training Center

    Data.gov (United States)

    Federal Laboratory Consortium — HAMMER stands for Hazardous Materials Management and Emergency Response, and was named for Sam Volpentest, a long-time community leader and advocate of the Hanford...

  14. E-tarneahelas viib koostöö kasumini / Hele Hammer

    Index Scriptorium Estoniae

    Hammer, Hele, 1974-

    2011-01-01

    E-tarneahel võimaldab väiksemat laovaru ja õigeaegseid tarneid. Pideva asenduse strateegia (VMI, CRP). Skeem: Info ja kauba liikumine e-tarneahelas. Struktureeritud e-andmevahetus organisatsioonide vahel EDI, mille suurim operaator Baltikumis on Telema

  15. Me õpime! / Marju Lauristin, Katri Raik, Ivo Saarma...[jt.

    Index Scriptorium Estoniae

    2009-01-01

    Küsimustele vastavad: Tartu Ülikooli professor Marju Lauristin, TÜ Narva kolledži direktor Katri Raik, erahaigla Fertilitas juht ja naistearst Ivo Saarma, Regio juhatuse esimees Teet Jagomägi, venekeelse Aktuaalse Kaamera toimetuse juht Jevgenia Garanža

  16. Condensation induced water hammer safety

    Energy Technology Data Exchange (ETDEWEB)

    Gintner, M.A.

    1997-03-10

    Condensation induced water hammer events in piping systems can cause catastrophic steam system failures which can result in equipment damage, personal injury, and even death. As an industry, we have learned to become accustomed to the ''banging'' that we often hear in our steam piping systems, and complacent in our actions to prevent it. It is unfortunate that lives are lost needlessly, as this type of water hammer event is preventable if one only applies some basic principles when operating and maintaining their steam systems. At the U. S. Department of Energy's Hanford Site where I work, there was one such accident that occurred in 1993 which took the life of a former co-worker and friend of mine. Hanford was established as part of the Manhattan Project during World War II. it is a 560 square mile complex located along the banks of the Columbia River in Southeastern Washington State. For almost 45 years, hanford's mission was to produce weapons grade plutonium for our nations defense programs. Today, Hanford no longer produces plutonium, but is focused on site clean-up and economic diversification. Hanford still uses steam for heating and processing activities, utilizing over 20 miles of piping distribution systems similar to those found in industry. Although these aging systems are still sound, they cannot stand up to the extreme pressure pulses developed by a condensation induced water hammer.

  17. Hazardous Materials Management and Emergency Response (HAMMER)

    Data.gov (United States)

    Federal Laboratory Consortium — The Volpentest Hazardous Materials Management and Emergency Response (HAMMER) Federal Training Center is a safety and emergency response training center that offers...

  18. Buksevand for øjnene af hele verden

    DEFF Research Database (Denmark)

    Fugl, Marie

    2009-01-01

    På internettet udvides randen af mobbetilskuere til potentielt hele verden. Det kan mangedoble de følelser, der er forbundet med en offentliggjort ydmygelse, fortæller mobbeforsker Jette Kofoed. Udgivelsesdato: Maj...

  19. VisIVO: A Library and Integrated Tools for Large Astrophysical Dataset Exploration

    Science.gov (United States)

    Becciani, U.; Costa, A.; Ersotelos, N.; Krokos, M.; Massimino, P.; Petta, C.; Vitello, F.

    2012-09-01

    VisIVO provides an integrated suite of tools and services that can be used in many scientific fields. VisIVO development starts in the Virtual Observatory framework. VisIVO allows users to visualize meaningfully highly-complex, large-scale datasets and create movies of these visualizations based on distributed infrastructures. VisIVO supports high-performance, multi-dimensional visualization of large-scale astrophysical datasets. Users can rapidly obtain meaningful visualizations while preserving full and intuitive control of the relevant parameters. VisIVO consists of VisIVO Desktop - a stand-alone application for interactive visualization on standard PCs, VisIVO Server - a platform for high performance visualization, VisIVO Web - a custom designed web portal, VisIVOSmartphone - an application to exploit the VisIVO Server functionality and the latest VisIVO features: VisIVO Library allows a job running on a computational system (grid, HPC, etc.) to produce movies directly with the code internal data arrays without the need to produce intermediate files. This is particularly important when running on large computational facilities, where the user wants to have a look at the results during the data production phase. For example, in grid computing facilities, images can be produced directly in the grid catalogue while the user code is running in a system that cannot be directly accessed by the user (a worker node). The deployment of VisIVO on the DG and gLite is carried out with the support of EDGI and EGI-Inspire projects. Depending on the structure and size of datasets under consideration, the data exploration process could take several hours of CPU for creating customized views and the production of movies could potentially last several days. For this reason an MPI parallel version of VisIVO could play a fundamental role in increasing performance, e.g. it could be automatically deployed on nodes that are MPI aware. A central concept in our development is thus to

  20. Water Hammer in Pumped Sewer Mains

    DEFF Research Database (Denmark)

    Larsen, Torben

    This publication is intended for engineers seeking an introduction to the problem of water hammer in pumped pressure mains. This is a subject of increasing interest because of the development of larger and more integrated sewer systems. Consideration of water hammer is essential for structural...

  1. Modern Modeling of Water Hammer

    Directory of Open Access Journals (Sweden)

    Urbanowicz Kamil

    2017-09-01

    Full Text Available Hydraulic equipment on board ships is common. It assists in the work of: steering gear, pitch propellers, watertight doors, cargo hatch covers, cargo and mooring winches, deck cranes, stern ramps etc. The damage caused by transient flows (which include among others water hammer are often impossible to repair at sea. Hence, it is very important to estimate the correct pressure runs and associated side effects during their design. The presented study compares the results of research on the impact of a simplified way of modeling the hydraulic resistance and simplified effective weighting functions build of two and three-terms on the estimated results of the pressure changes. As it turns out, simple effective two-terms weighting functions are able to accurately model the analyzed transients. The implementation of the presented method will soon allow current automatic protection of hydraulic systems of the adverse effects associated with frequent elevated and reduced pressures.

  2. Infrasound Generation from the HH Seismic Hammer.

    Energy Technology Data Exchange (ETDEWEB)

    Jones, Kyle Richard

    2014-10-01

    The HH Seismic hammer is a large, "weight-drop" source for active source seismic experiments. This system provides a repetitive source that can be stacked for subsurface imaging and exploration studies. Although the seismic hammer was designed for seismological studies it was surmised that it might produce energy in the infrasonic frequency range due to the ground motion generated by the 13 metric ton drop mass. This study demonstrates that the seismic hammer generates a consistent acoustic source that could be used for in-situ sensor characterization, array evaluation and surface-air coupling studies for source characterization.

  3. Kemi er hele fundamentet for vores livsførelse

    DEFF Research Database (Denmark)

    Kepp, Kasper Planeta

    2011-01-01

    Talemåden “der er god kemi imellem dem” tager de fleste næppe bogstaveligt. Men som kemiker gør man, for al kommunikation mellem os mennesker styres ikke kun af lys- og lydimpulser, men også af hele den kemiske efterbehandling, der påvirker alle vores sanser....

  4. Breaking waves on a dynamic Hele-Shaw beach

    NARCIS (Netherlands)

    Bokhove, Onno; van der Horn, Bram; van der Horn, Avraham/Bram; van der Meer, Roger M.; Zweers, Wout; Thornton, Anthony Richard

    We report the formation of quasi-steady beaches and dunes via breaking waves in our tabletop ‘Hele-Shaw’ beach experiment. Breaking waves are generated by a wave maker, and zeolite particles act as sand. The tank is narrow, just over one-particle diameter wide, creating a quasi-2D set-up. Classical

  5. Development of a Piezoelectric Rotary Hammer Drill

    Science.gov (United States)

    Domm, Lukas N.

    2011-01-01

    The Piezoelectric Rotary Hammer Drill is designed to core through rock using a combination of rotation and high frequency hammering powered by a single piezoelectric actuator. It is designed as a low axial preload, low mass, and low power device for sample acquisition on future missions to extraterrestrial bodies. The purpose of this internship is to develop and test a prototype of the Piezoelectric Rotary Hammer Drill in order to verify the use of a horn with helical or angled cuts as a hammering and torque inducing mechanism. Through an iterative design process using models in ANSYS Finite Element software and a Mason's Equivalent Circuit model in MATLAB, a horn design was chosen for fabrication based on the predicted horn tip motion, electromechanical coupling, and neutral plane location. The design was then machined and a test bed assembled. The completed prototype has proven that a single piezoelectric actuator can be used to produce both rotation and hammering in a drill string through the use of a torque inducing horn. Final data results include bit rotation produced versus input power, and best drilling rate achieved with the prototype.

  6. On HammerCloud and ETF

    CERN Document Server

    Babik, Marian; CERN. Geneva. IT Department

    2017-01-01

    This technical report presents the two major synthetic testing platforms used in WLCG, HammerCloud (HC) and Experiments Test Framework (ETF). It gives an overview of their architecture, components, deployment and operations and discusses the possible commonalities/differences and possible future synergies between the two projects.

  7. Hammering Does Not Fit Fitts' Law

    Directory of Open Access Journals (Sweden)

    Tadej Petrič

    2017-05-01

    Full Text Available While movement is essential to human wellbeing, we are still unable to reproduce the deftness and robustness of human movement in automatons or completely restore function to individuals with many types of motor impairment. To better understand how the human nervous system plans and controls movements, neuromechanists employ simple tasks such as upper extremity reaches and isometric force tasks. However, these simple tasks rarely consider impacts and may not capture aspects of motor control that arise from real-world complexity. Here we compared existing models of motor control with the results of a periodic targeted impact task extended from Bernstein's seminal work: hammering a nail into wood. We recorded impact forces and kinematics from 10 subjects hammering at different frequencies and with hammers with different physical properties (mass and face area. We found few statistical differences in most measures between different types of hammer, demonstrating human robustness to minor changes in dynamics. Because human motor control is thought to obey optimality principles, we also developed a feedforward optimal simulation with a neuromechanically inspired cost function that reproduces the experimental data. However, Fitts' Law, which relates movement time to distance traveled and target size, did not match our experimental data. We therefore propose a new model in which the distance moved is a logarithmic function of the time to move that yields better results (R2 ≥ 0.99 compared to R2 ≥ 0.88. These results support the argument that humans control movement in an optimal way, but suggest that Fitts' Law may not generalize to periodic impact tasks.

  8. Closed Die Hammer Forging of Inconel 718

    OpenAIRE

    S. Chenna Krishna; Satish Kumar Singh; S.V.S. Narayana Murty; Ganji Venkata Narayana; Abhay K. Jha; Bhanu Pant; George, Koshy M.

    2014-01-01

    A method for the production of Inconel 718 (IN-718) hemispherical domes by closed die hammer forging is proposed. Different combination of operations employed for production are as follows: (i) preforging + final forging + air cooling, (ii) preforging + final forging + controlled cooling, (iii) direct forging + controlled cooling, and (iv) direct forging + air cooling. Last three combinations yielded a crack free hemispherical dome. The forged hemispherical domes were solution annealed at 980...

  9. A numerical study of unstable Hele-Shaw flow

    DEFF Research Database (Denmark)

    Hansen, Erik Bent; Rasmussen, Henning

    1999-01-01

    A numerical procedure which is based on an integral equation for the normal velocity at the interface is developed for the unstable flow with surface tension in a Hele-Shaw cell. The procedure has been validated by comparing solutions obtained by it with published results. It has also been applied...... to a study of the effect of small changes in the initial data on the later profiles and it was found that even very small differences can lead to large differences in the profiles at later times. (C) 1999 Elsevier Science Ltd. All rights reserved....

  10. Computer simulation of viscous fingering in a lifting Hele-Shaw cell ...

    Indian Academy of Sciences (India)

    We report a computer simulation study of fingering patterns, where circular or square grooves are etched on to the lower plate. Results are compared with experiments. Keywords. Viscous fingering; Hele-Shaw cell; simulation. PACS Nos 47.15.gp; 47.20.Gv; 07.05.Tp. 1. Introduction. Viscous fingering in the lifting Hele-Shaw ...

  11. Automated Grid Monitoring for LHCb through HammerCloud

    CERN Multimedia

    CERN. Geneva

    2015-01-01

    The HammerCloud system is used by CERN IT to monitor the status of the Worldwide LHC Computing Grid (WLCG). HammerCloud automatically submits jobs to WLCG computing resources, closely replicating the workflow of Grid users (e.g. physicists analyzing data). This allows computation nodes and storage resources to be monitored, software to be tested (somewhat like continuous integration), and new sites to be stress tested with a heavy job load before commissioning. The HammerCloud system has been in use for ATLAS and CMS experiments for about five years. This summer's work involved porting the HammerCloud suite of tools to the LHCb experiment. The HammerCloud software runs functional tests and provides data visualizations. HammerCloud's LHCb variant is written in Python, using the Django web framework and Ganga/DIRAC for job management.

  12. Theoretical Virtual Observatory and Grid Web services: VisIVO and new capabilities

    Science.gov (United States)

    Costa, A.; Becciani, U.; Gheller, C.; Comparato, M.; Larsson, B.

    2007-08-01

    VisIVO is a tool for 3D visualization, it provides an effective and intuitive way of managing, visualizing and analysing the large amount of data produced by observations and numerical simulations. The software is specifically designed to deal with multidimensional data. Catalogues and numerical simulations represent the basic target of VisIVO. The package is written in C++. This poster describes VIsIVO's Grid Web Service (VWS) and its counterpart client side developed in VisIVO. VisIVO's Grid Web Service is developed as a part of the Italian Virtual Observatory, it allows to run applications in grid using the web service technology. The VWS has been designed to work within a Virtual Observatory environment so that the interface for the current application, shown in this poster, and the interfaces for other applications are described by a small and constant piece of WSDL code. Our first application is HOP: an algorithm for finding groups of particles based on the one developed and coded by Daniel Eisenstein & Piet Hut, Institute for Advanced Study, Princeton, NJ. We have developed VWS using Java AXIS libraries for the server side and C++ AXIS libraries for the client side. The access to the computational resources and storage areas is based on grid services in the INFN Production Grid and from this the VWS inherits asynchronous features, scheduling and matching algorithms. HOP was distributed as RPM Package and was installed in the Worker Node Elements of the INFN Production Grid. The idea is to use external tools through the grid avoiding the integration in our application. We can focus on the I/O management of the jobs and on the standardization of the access methods for the different analysis tools improving the scalability of our solution.

  13. Physics-Based Pneumatic Hammer Instability Model Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Florida Turbine Technologies (FTT) proposes to conduct research necessary to develop a physics-based pneumatic hammer instability model for hydrostatic bearings...

  14. Concrete density estimation by rebound hammer method

    Energy Technology Data Exchange (ETDEWEB)

    Ismail, Mohamad Pauzi bin, E-mail: pauzi@nm.gov.my; Masenwat, Noor Azreen bin; Sani, Suhairy bin; Mohd, Shukri [NDT Group, Nuclear Malaysia, Bangi, Kajang, Selangor (Malaysia); Jefri, Muhamad Hafizie Bin; Abdullah, Mahadzir Bin [Material Technology Program, Faculty of Applied Sciences, UiTM, Shah Alam, Selangor (Malaysia); Isa, Nasharuddin bin; Mahmud, Mohamad Haniza bin [Pusat Penyelidikan Mineral, Jabatan Mineral dan Geosains, Ipoh, Perak (Malaysia)

    2016-01-22

    Concrete is the most common and cheap material for radiation shielding. Compressive strength is the main parameter checked for determining concrete quality. However, for shielding purposes density is the parameter that needs to be considered. X- and -gamma radiations are effectively absorbed by a material with high atomic number and high density such as concrete. The high strength normally implies to higher density in concrete but this is not always true. This paper explains and discusses the correlation between rebound hammer testing and density for concrete containing hematite aggregates. A comparison is also made with normal concrete i.e. concrete containing crushed granite.

  15. Study on liquid-liquid bimetal composite casting hammers

    Directory of Open Access Journals (Sweden)

    Rong Shoufan

    2014-09-01

    Full Text Available Crusher hammers for the mineral processing industry must meet the demands of both high wear resistance at the hammer head and high impact toughness at the hammer handle. The crusher hammers made of Hadfield steel have typically low service life of less than 40 hours. To solve the problem, a kind of bimetal crusher hammers made of high chromium cast iron (HCCI and low alloy steel (LAS has been successfully developed by using liquid-liquid composite casting. The microstructure and composite interface bonding was analyzed using optical microscope, SEM, EDX and XRD. Micrographs indicate that the composite interface is metallurgically bonded with a zigzag shape across the boundary and without unbound region or void. After heat treatment, the composite hammers have shown excellent properties. The hardness of HCCI is at least 63 HRC and its ak is greater than 3.5 J.cm-2/FONT>cm-2; the hardness of LAS is greater than 35 HRC and its ak is no less than 80 J.cm-2/FONT>cm-2. Diffusion of elements takes place at the interface and forms a transition region. The micro hardness increases from LAS to the interface and then to HCCI. Wear comparison was made separately between the bimetal composite hammer and a Hadfield steel hammer in two quarries of Jilin province and Liaoning province. The results showed that the liquid-liquid bimetal composite hammers did not have the falling off of hammer head or impact fracture phenomenon, and their service life was 3.75 times as long as that of the Hadfield steel hammers.

  16. Kapo arvates ässitas Elmar Sepp Ivo Parbust pistist võtma / Risto Berendson, Urmas Seaver

    Index Scriptorium Estoniae

    Berendson, Risto, 1975-

    2009-01-01

    Kaitsepolitsei kahtlustab, et Keskerakonna liige Elmar Sepp kihutas Tallinna linnavalitsuse nõunikku Ivo Parbust Jüri Vilmsi Sihtkapitali kasuks pistist võtma. Vt. samas: Elmar Sepa eelmine kriminaalasi

  17. Multiple steadily translating bubbles in a Hele-Shaw channel

    CERN Document Server

    Green, Christopher C

    2013-01-01

    Analytical solutions are constructed for an assembly of any finite number of bubbles in steady motion in a Hele-Shaw channel. The solutions are given in the form of a conformal mapping from a bounded multiply connected circular domain to the flow region exterior to the bubbles. The mapping is written as the sum of two analytic functions---corresponding to the complex potentials in the laboratory and co-moving frames---that map the circular domain onto respective degenerate polygonal domains. These functions are obtained using the generalised Schwarz-Christoffel formula for multiply connected domains in terms of the Schottky-Klein prime function. Our solutions are very general in that no symmetry assumption concerning the geometrical disposition of the bubbles is made. Several examples for various bubble configurations are discussed.

  18. Viscoplastic flow in a Hele-Shaw cell

    Science.gov (United States)

    Balmforth, Neil; Hewitt, Duncan

    2015-11-01

    A theoretical study is presented of the flow of viscoplastic fluid through a Hele-Shaw cell that contains various kinds of obstructions. Circular and elliptical blockages of the cell are considered together with step-wise contractions or expansions in slot width, all within the simplifying approximation of a narrow gap. Specific attention is paid to the flow patterns that develop around the obstacles, particularly any stagnant plugged regions, and the asymptotic limits of relatively small or large yield stress. Periodic arrays of circular contractions or expansions are studied to explore the interference between obstructions. Finally, viscoplastic flow through a cell with randomly roughened walls is examined, and it is shown that constructive interferences of local contractions and expansions leads to a pronounced channelization of the flow. An optimization algorithm based on minimisation of the pressure drop is derived to construct the path of the channels in the limit of relatively large yield stress or, equivalently, relatively slow flow.

  19. A Comparative Analysis of the Rebound Hammer and Ultrasonic ...

    African Journals Online (AJOL)

    This work presents a study on the comparison between some non-destructive testing tech-niques (Rebound Hammer and Ultrasonic Pulse Velocity). Tests were performed to com-pare the accuracy between the rebound hammer and the ultrasonic pulse velocity methodin estimating the strength of concrete. Eighty samples ...

  20. a comparative analysis of the rebound hammer and ultrasonic pulse

    African Journals Online (AJOL)

    2012-03-01

    Mar 1, 2012 ... niques (Rebound Hammer and Ultrasonic Pulse Velocity). Tests were performed to com- pare the accuracy between the rebound hammer and the ultrasonic pulse velocity method in estimating the strength of concrete. Eighty samples (cubes of 150 × 150 × 150) were prepared using two mix designs of 1:2:4 ...

  1. Ultrasonic/Sonic Rotary-Hammer Drills

    Science.gov (United States)

    Badescu, Mircea; Sherrit, Stewart; Bar-Cohen, Yoseph; Bao, Xiaoqi; Kassab, Steve

    2010-01-01

    Ultrasonic/sonic rotary-hammer drill (USRoHD) is a recent addition to the collection of apparatuses based on ultrasonic/sonic drill corer (USDC). As described below, the USRoHD has several features, not present in a basic USDC, that increase efficiency and provide some redundancy against partial failure. USDCs and related apparatuses were conceived for boring into, and/or acquiring samples of, rock or other hard, brittle materials of geological interest. They have been described in numerous previous NASA Tech Briefs articles. To recapitulate: A USDC can be characterized as a lightweight, lowpower, piezoelectrically driven jackhammer in which ultrasonic and sonic vibrations are generated and coupled to a tool bit. A basic USDC includes a piezoelectric stack, an ultrasonic transducer horn connected to the stack, a free mass ( free in the sense that it can bounce axially a short distance between hard stops on the horn and the bit), and a tool bit. The piezoelectric stack creates ultrasonic vibrations that are mechanically amplified by the horn. The bouncing of the free mass between the hard stops generates the sonic vibrations. The combination of ultrasonic and sonic vibrations gives rise to a hammering action (and a resulting chiseling action at the tip of the tool bit) that is more effective for drilling than is the microhammering action of ultrasonic vibrations alone. The hammering and chiseling actions are so effective that unlike in conventional twist drilling, little applied axial force is needed to make the apparatus advance into the material of interest. There are numerous potential applications for USDCs and related apparatuses in geological exploration on Earth and on remote planets. In early USDC experiments, it was observed that accumulation of cuttings in a drilled hole causes the rate of penetration of the USDC to decrease steeply with depth, and that the rate of penetration can be increased by removing the cuttings. The USRoHD concept provides for

  2. IVO develops a new repair technique for underwater sites. Viscous doughlike substance underwater cracks

    Energy Technology Data Exchange (ETDEWEB)

    Klingstedt, G.; Leisio, C. [ed.

    1998-07-01

    A viscous sealant is revolutionizing repair of the stone and concrete masonry of underwater dams, bridges and canals. There is now no need for expensive and time-consuming cofferdams, since a diver can extrude quick-setting mortar into underwater structures needing repair. This technique has worked well in recent years in various parts of Finland even in strongly flowing water. IVO experts are now starting to look more beyond the borders of Finland

  3. Energy Innovation 1998. IVO group`s research and development report

    Energy Technology Data Exchange (ETDEWEB)

    Salminen, P.; Laiho, Y.; Kaikkonen, H.; Leisio, C.; McConchie, R.; Fletcher, R. [eds.

    1998-07-01

    The IVO Group is a Finnish company mastering all aspects of the entire energy chain, and also operating extensively on the international market. The Group`s operations concentrate on five business areas: energy, engineering, operation and maintenance, grid services, and energy measurement. The personnel numbers well over 8 800, and the turnover is about FIM 14 billion. The services to customers include the supply of electricity and heat, the planning, construction, operation and maintenance of power plants and transmission systems, the transmission of power, and other services requiring expertise in all the key fields of energy engineering. Mastery of the entire energy chain gives us a substantial competitive edge on international markets, where the IVO Group has been a player for decades. The operations have expanded to the other Nordic countries, which now constitute the home market. Focal areas also include Great Britain, Central and Eastern Europe and Southeast Asia. The IVO Group annually invests some FIM 250 million in research and development. A large proportion of this money is used for the development of environmentally benign solutions

  4. Closed Die Hammer Forging of Inconel 718

    Directory of Open Access Journals (Sweden)

    S. Chenna Krishna

    2014-01-01

    Full Text Available A method for the production of Inconel 718 (IN-718 hemispherical domes by closed die hammer forging is proposed. Different combination of operations employed for production are as follows: (i preforging + final forging + air cooling, (ii preforging + final forging + controlled cooling, (iii direct forging + controlled cooling, and (iv direct forging + air cooling. Last three combinations yielded a crack free hemispherical dome. The forged hemispherical domes were solution annealed at 980°C for 1 h and air cooled. The grain size of the domes at all locations was finer than ASTM No 4. Mechanical properties of the forged dome in solution treated and aged condition (STA were better than feedstock used.

  5. Testing Hammer and Stanton's Reengineering Success Diagnostic

    Directory of Open Access Journals (Sweden)

    Felicity Murphy

    2000-05-01

    Full Text Available Business Process Reengineering (BPR is no longer referenced in academic literature with the regularity that it was in the heady days of the mid-nineties but it is still in use in Australian organisations. We are also changing processes radically as new software is implemented or new electronic markets are embraced and the lessons of reengineering can be applied to these process changes. This study makes three main contributions by: (1 investigating the organisational context prior to the embarkation on projects of major change in Australia, (2 testing the validity of a diagnostic proposed by Hammer and Stanton (1995 to be used when assessing the ability of organisations to succeed at reengineering, and (3 examining the impact of the organisational environment prior to change on the outcome of reengineering projects.

  6. HAMMER: Reweighting tool for simulated data samples

    CERN Document Server

    Duell, Stephan; Ligeti, Zoltan; Papucci, Michele; Robinson, Dean

    2016-01-01

    Modern flavour physics experiments, such as Belle II or LHCb, require large samples of generated Monte Carlo events. Monte Carlo events often are processed in a sophisticated chain that includes a simulation of the detector response. The generation and reconstruction of large samples is resource-intensive and in principle would need to be repeated if e.g. parameters responsible for the underlying models change due to new measurements or new insights. To avoid having to regenerate large samples, we work on a tool, The Helicity Amplitude Module for Matrix Element Reweighting (HAMMER), which allows one to easily reweight existing events in the context of semileptonic b → q ` ̄ ν ` analyses to new model parameters or new physics scenarios.

  7. Chebyshev super spectral viscosity method for water hammer analysis

    Directory of Open Access Journals (Sweden)

    Hongyu Chen

    2013-09-01

    Full Text Available In this paper, a new fast and efficient algorithm, Chebyshev super spectral viscosity (SSV method, is introduced to solve the water hammer equations. Compared with standard spectral method, the method's advantage essentially consists in adding a super spectral viscosity to the equations for the high wave numbers of the numerical solution. It can stabilize the numerical oscillation (Gibbs phenomenon and improve the computational efficiency while discontinuities appear in the solution. Results obtained from the Chebyshev super spectral viscosity method exhibit greater consistency with conventional water hammer calculations. It shows that this new numerical method offers an alternative way to investigate the behavior of the water hammer in propellant pipelines.

  8. Goal Translation for a Hammer for Coq (Extended Abstract

    Directory of Open Access Journals (Sweden)

    Łukasz Czajka

    2016-06-01

    Full Text Available Hammers are tools that provide general purpose automation for formal proof assistants. Despite the gaining popularity of the more advanced versions of type theory, there are no hammers for such systems. We present an extension of the various hammer components to type theory: (i a translation of a significant part of the Coq logic into the format of automated proof systems; (ii a proof reconstruction mechanism based on a Ben-Yelles-type algorithm combined with limited rewriting, congruence closure and a first-order generalization of the left rules of Dyckhoff's system LJT.

  9. Elastic fingering in rotating Hele-Shaw flows

    KAUST Repository

    Carvalho, Gabriel D.

    2014-05-21

    The centrifugally driven viscous fingering problem arises when two immiscible fluids of different densities flow in a rotating Hele-Shaw cell. In this conventional setting an interplay between capillary and centrifugal forces makes the fluid-fluid interface unstable, leading to the formation of fingered structures that compete dynamically and reach different lengths. In this context, it is known that finger competition is very sensitive to changes in the viscosity contrast between the fluids. We study a variant of such a rotating flow problem where the fluids react and produce a gellike phase at their separating boundary. This interface is assumed to be elastic, presenting a curvature-dependent bending rigidity. A perturbative weakly nonlinear approach is used to investigate how the elastic nature of the interface affects finger competition events. Our results unveil a very different dynamic scenario, in which finger length variability is not regulated by the viscosity contrast, but rather determined by two controlling quantities: a characteristic radius and a rigidity fraction parameter. By properly tuning these quantities one can describe a whole range of finger competition behaviors even if the viscosity contrast is kept unchanged. © 2014 American Physical Society.

  10. L’Empire Ottoman d’Ivo Andrić Ivo Andrić’s Ottoman Period: Seeking for Lost History

    Directory of Open Access Journals (Sweden)

    Branka Šarančić

    2012-05-01

    Full Text Available La philosophie romanesque d’Ivo Andrić et sa remise en question de la « vérité historique ». Notre article vise à mettre en évidence le potentiel subversif de la philosophie romanesque d’Ivo Andrić, dont la démarche artistique tend moins à faire revivre le passé dans sa réalité historique qu’à remettre en question la notion même de « vérité historique ». Pour Andrić, la tâche de l’écrivain consiste surtout à traduire dans le langage romanesque tout ce qui reste hors de portée de l’histoire dite « objective » (d’où le rapprochement avec l’œuvre de Marcel Proust. Car ce qui persiste une fois calmées les tempêtes de l’Histoire (avec un grand H, c’est le besoin de se réapproprier son destin historique en transformant les événements subis en autant d’histoires, qui font revivre la période ottomane non pas telle qu’elle fut réellement, mais telle qu’elle puisse être lue et comprise par un peuple à la recherche de sa propre identité.The purpose of our article is to reveal the subversive potential of Ivo Andrić’s novelistic philosophy and whose artistic process tends less to revive the past in its historical reality than to call the notion itself of the “historical truth” in question. In Andrić’s opinion, the writer’s main task lies essentially in expressing all that is beyond the reach of the so-called objective history in a novelistic language (relationship with Marcel Proust’s work. For, what still remains once the storms of History have died down, is the need one has to appropriate the historical fate and change the external events in as much tales, which restitute the Ottoman period not as it really was but as it could be read and understood by people searching for their own identity.

  11. Physics-Based Pneumatic Hammer Instability Model Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The objective of this project is to develop a physics-based pneumatic hammer instability model that accurately predicts the stability of hydrostatic bearings...

  12. Pump-stopping water hammer simulation based on RELAP5

    Science.gov (United States)

    Yi, W. S.; Jiang, J.; Li, D. D.; Lan, G.; Zhao, Z.

    2013-12-01

    RELAP5 was originally designed to analyze complex thermal-hydraulic interactions that occur during either postulated large or small loss-of-coolant accidents in PWRs. However, as development continued, the code was expanded to include many of the transient scenarios that might occur in thermal-hydraulic systems. The fast deceleration of the liquid results in high pressure surges, thus the kinetic energy is transformed into the potential energy, which leads to the temporary pressure increase. This phenomenon is called water hammer. Generally water hammer can occur in any thermal-hydraulic systems and it is extremely dangerous for the system when the pressure surges become considerably high. If this happens and when the pressure exceeds the critical pressure that the pipe or the fittings along the pipeline can burden, it will result in the failure of the whole pipeline integrity. The purpose of this article is to introduce the RELAP5 to the simulation and analysis of water hammer situations. Based on the knowledge of the RELAP5 code manuals and some relative documents, the authors utilize RELAP5 to set up an example of water-supply system via an impeller pump to simulate the phenomena of the pump-stopping water hammer. By the simulation of the sample case and the subsequent analysis of the results that the code has provided, we can have a better understand of the knowledge of water hammer as well as the quality of the RELAP5 code when it's used in the water-hammer fields. In the meantime, By comparing the results of the RELAP5 based model with that of other fluid-transient analysis software say, PIPENET. The authors make some conclusions about the peculiarity of RELAP5 when transplanted into water-hammer research and offer several modelling tips when use the code to simulate a water-hammer related case.

  13. The profile of a professional reader: Ivo Vojnović’s reading practices

    Directory of Open Access Journals (Sweden)

    Nada Topić

    2012-02-01

    Full Text Available The aim of the paper is to reconstruct the reading profile of Ivo Vojnović using the literature overview and the analysis of his personal correspondence, in order to answer the research questions suggested in Robert Darnton’s methodological texts. The paper aims to reconstruct not only what Vojnović was reading, but also when, where, how and why he was reading, starting with the question who he was as a reader. The study sets off from bibliographic data (who on Vojnović, and proceeds to look at the content of his correspondence in three time periods: 1878-1906, 1907-1918, 1919-1929 (when. His place of residence is also stated for each period. The study singled out all references to reading related to both the author and the title (what and particular segments (how and why. Research results give an insight into Ivo Vojnović’s reading world, providing not only the list of authors and titles of books he read, but also his attitude towards what he read, and the context and reasons behind his reading interest. This partly reconstructs the reading profile of Ivo Vojnović as an expert in Croatian and European classical and contemporary literature, a passionate reader bridging European and Croatian culture and literature, in which he for the first time introduced the elements of modernity and symbolism. A study of other available sources that contain the information on Vojnović’s reading (diary entries, literary, theoretical and historical studies of his work, etc. would give a more holistic insight into possible interpretations of his reading profile.

  14. Dr. Ivo Pirc (1891–1967 and development of public health in Slovenia (1923–1941

    Directory of Open Access Journals (Sweden)

    Zvonka Zupanič Slavec

    2012-02-01

    Full Text Available A physician and humanist Dr Ivo Pirc (1891–1967, socially sensitive and organizationally capable leader of the newly formed Hygiene Institute in Ljubljana, firmly stood for the development of the Slovenian public health between the two world wars (1919–1941. As an idealist with a belief in humanism he got engaged in the process of socialization of medicine and he promoted public health among the Slovenian people according to Štampar´s model. In 1923 the Hygiene Institute was founded in Ljubljana, and until the Second World War were formed over 20 health centers and associated dispensaries (antituberculotic, antisyphilitic and in Prekmurje antititrahomic in Dravska banovina. The Hygiene Institute had the following specialized departments: bacteriological and epidemiological, social-medical, chemical, sanitary–technicaland laboratories. In Ljubljana, the School Clinic was founded, which organized holiday camps and milk kitchens, school medicine for preventive work with school children, Institute for the Protection of Mothers and Children and the School for Protective Nurses. Most health centers had general dispensaries, children’s dispensaries, school clinic, counseling facilities for mothers and children. The work done by Ivo Pirc set a firm foundation for modern Slovenian public health and he became its founder.

  15. Exact solutions for a periodic assembly of bubbles in a Hele-Shaw channel

    CERN Document Server

    Vasconcelos, Giovani L

    2014-01-01

    Exact solutions are reported for a periodic assembly of bubbles steadily co-travelling in a Hele-Shaw channel. The solutions are obtained as conformal mappings from a multiply connected circular domain in an auxiliary complex plane to the flow region in a period cell. The conformal mappings are constructed using the generalized Schwarz-Christoffel formula for multiply connected polygonal domains in terms of products of Schottky-Klein prime functions. It is shown that previous solutions for multiple steady bubbles in a Hele-Shaw cell are all particular cases of the solutions described herein. Examples of specific bubble configurations are discussed.

  16. Analysis of the dynamic characteristics of gas chamber in rotary hammer

    National Research Council Canada - National Science Library

    YAN, Shiwei; HUANG, Shangyu; ZOU, Fangli

    2016-01-01

    Rotary hammer is a high-frequency impact machine with a complicated gas chamber. The design parameters of the gas chamber are dominating to impact energy output and impact efficiency of a rotary hammer...

  17. On the Wave Stresses in the Rods of Anvil Hammers

    Directory of Open Access Journals (Sweden)

    V. M. Sinitskiy

    2014-01-01

    Full Text Available With operating anvil hammers, there are rigid impacts of die tools, and as a result, almost instantaneous impact stops of the falling parts of hammer. Such operating conditions lead to the accelerated breakdowns of rods because of significant wave stresses arising in them. Common differential and integral methods to estimate wave stresses are widespread in engineering practice. However, to use them a researcher has to possess certain skills and special software. We consider the method for estimating the wave stresses in the rods of anvil hammers based on Laplace transforms (LT of wave equation. The article shows a procedure to set up and solve differential wave equations by operator method. These equations describe the wave propagation process of strains and stresses in the rods of anvil hammers with rigid impact and taking into account a damping rod connection with the head of hammer. The method takes into consideration an influence of both piston and rod weights and of mechanical and geometrical characteristics of rod on the stress value in the placement of rod in hammer head. Results analysis shows that a sufficiently efficient method for practical improving the durability of rods is the method of damping impact load on the rod through setting the damping devices in the form either of elastic "pad" of one or another design or of hydraulic shock absorbers in the placement of its connection with the hammer head. In this case there is a change of the wave front, it becomes flatter. It is shown that the stresses in the rod are proportional to the amount of wave stresses because of the own impact of rod and piston, which make a total weight of the system. Effect of piston weight on the stresses value at the rod during impact is directly proportional to the ratio of its weight to the rod weight. The geometric parameters of rod and the speed of the falling parts before the impact also influence on the value of stresses in the rod.The represented

  18. Computer simulation of viscous fingering in a lifting Hele-Shaw cell ...

    Indian Academy of Sciences (India)

    We simulate viscous fingering generated by separating two plates with a constant force, in a lifting Hele-Shaw cell. Variation in the patterns for different fluid viscosity and lifting force is studied. Viscous fingering is strongly affected by anisotropy. We report a computer simulation study of fingering patterns, where circular or ...

  19. Optimization of Mud Hammer Drilling Performance--A Program to Benchmark the Viability of Advanced Mud Hammer Drilling

    Energy Technology Data Exchange (ETDEWEB)

    Arnis Judzis

    2006-03-01

    Operators continue to look for ways to improve hard rock drilling performance through emerging technologies. A consortium of Department of Energy, operator and industry participants put together an effort to test and optimize mud driven fluid hammers as one emerging technology that has shown promise to increase penetration rates in hard rock. The thrust of this program has been to test and record the performance of fluid hammers in full scale test conditions including, hard formations at simulated depth, high density/high solids drilling muds, and realistic fluid power levels. This paper details the testing and results of testing two 7 3/4 inch diameter mud hammers with 8 1/2 inch hammer bits. A Novatek MHN5 and an SDS Digger FH185 mud hammer were tested with several bit types, with performance being compared to a conventional (IADC Code 537) tricone bit. These tools functionally operated in all of the simulated downhole environments. The performance was in the range of the baseline ticone or better at lower borehole pressures, but at higher borehole pressures the performance was in the lower range or below that of the baseline tricone bit. A new drilling mode was observed, while operating the MHN5 mud hammer. This mode was noticed as the weight on bit (WOB) was in transition from low to high applied load. During this new ''transition drilling mode'', performance was substantially improved and in some cases outperformed the tricone bit. Improvements were noted for the SDS tool while drilling with a more aggressive bit design. Future work includes the optimization of these or the next generation tools for operating in higher density and higher borehole pressure conditions and improving bit design and technology based on the knowledge gained from this test program.

  20. Enhancing down-the-hole air hammer capacity in directional drilling

    Science.gov (United States)

    Klishin, V. I.; Timonin, V. V.; Kokoulin, D. I.; Alekseev, S. E.; Kubanychbek, B.

    2017-09-01

    The authors discuss the issue connected with drilling trajectory deviation and present the technique of rotary-percussion drilling with a down-the-hole air hammer. The article describes pilot testing of the air hammer drill PNB76 in Berezovskaya Mine. The ways of improving the air hammer drill are identified, and the basic diagram and R&D test data are given.

  1. Bottom driving casing technique predictions for impact hammers with TNOWAVE-R

    NARCIS (Netherlands)

    Foeken, R.J. van

    2000-01-01

    The driving of a casing pile with the impact of the hammer at the toe or bottom of the pile is an effective method compared to driving with the hammer at the pile top. A significant reduction of driving time and noise has been observed [1] for this type of driving. The energy of the impact hammer is

  2. Scope of problem assessed at IVO. The zebra mussel`s campaign of world conquest

    Energy Technology Data Exchange (ETDEWEB)

    Silvonen, J.; Oesch, P. [ed.

    1998-07-01

    The migrating shell - or `zebra mussel` as it is called on account of its black and white stripes - was originally a fresh-water mussel, but has since also adapted to brackish waters. As a result of human activity the species has spread quickly and widely from its native habitat. Operators of power plants and water treatment plants in particular have not been very happy about this. During its larval stage the zebra mussel can enter the cooling water systems; fasten itself to the pipes and - in the worst case - clog the system. The Environmental Protection Division of IVO has been assessing the spread of the zebra mussel and the resulting problems with the aid of reference literature and the assistance of Finnish researchers

  3. Radical Enformel in the Oeuvre of Ivo Gattin and Eugen Feller

    Directory of Open Access Journals (Sweden)

    Ješa Denegri

    2016-01-01

    Full Text Available The paper focuses on Ivo Gattin and Eugen Feller as prominent figures in the so-called “radical Enformel”, an artistic trend in Croatian painting during the late 1950s and early 1960s. Besides them, the representatives of radical Enformel include Vlado Kristl, Marijan Javšovar, and Đuro Seder, who likewise participated in the exhibition Informel 1956-1962 at Nova Gallery in 1977. The theoretical platform for this trend in painting was found in hypotheses presented in the influential text “Materia, tecnica e storia nell’informale” (1959 by the Italian artcritic Giulio Carlo Argan, which were adapted to the specific Croatian circumstances and examples.

  4. HammerCloud. Developments and operations in the grid

    Energy Technology Data Exchange (ETDEWEB)

    Elmsheuser, Johannes; Hoenig, Friedrich; Legger, Federica [Ludwig-Maximilians-Universitaet Muenchen (Germany); Boehler, Michael [Albert-Ludwigs-Universitaet Freiburg (Germany)

    2015-07-01

    With the exponential growth of LHC (Large Hadron Collider) data in the years 2010-2012, distributed computing has become the established way to analyse collider data. The ATLAS experiment Grid infrastructure includes more than 130 sites worldwide, ranging from large national computing centres to smaller university clusters. HammerCloud was previously introduced with the goals of enabling virtual organisations (VO) and site-administrators to run validation tests of the site and software infrastructure in an automated or on-demand manner. The HammerCloud infrastructure has been constantly improved to support the addition of new test workflows. These new workflows comprise validation and integration of the new ATLAS workload and data management systems JEDI and Rucio or the development and tests of new storage access protocols like HTTP/WebDAV using Davix and aria2c. Results of the continuous monitoring of site performances in functional and site stress tests are displayed in newly developed views on the HammerCloud webpages for site and VO administrators. We report on the development, optimisation and results of the various components in the HammerCloud framework.

  5. Impact of pipes networks simplification on water hammer phenomenon

    Indian Academy of Sciences (India)

    Simplification of water supply networks is an indispensible design step to make the original network easier to be analysed. The impact of networks' simplification on water hammer phenomenon is investigated. ... WHAMO software is used for simulation. All scenarios showed that both hydraulic equivalence and demands' ...

  6. Impact of pipes networks simplification on water hammer phenomenon

    Indian Academy of Sciences (India)

    Abstract. Simplification of water supply networks is an indispensible design step to make the original network easier to be analysed. The impact of networks' sim- plification on water hammer phenomenon is investigated. This study uses two loops network with different diameters, thicknesses, and roughness coefficients.

  7. Do chimpanzees use weight to select hammer tools?

    Directory of Open Access Journals (Sweden)

    Cornelia Schrauf

    Full Text Available The extent to which tool-using animals take into account relevant task parameters is poorly understood. Nut cracking is one of the most complex forms of tool use, the choice of an adequate hammer being a critical aspect in success. Several properties make a hammer suitable for nut cracking, with weight being a key factor in determining the impact of a strike; in general, the greater the weight the fewer strikes required. This study experimentally investigated whether chimpanzees are able to encode the relevance of weight as a property of hammers to crack open nuts. By presenting chimpanzees with three hammers that differed solely in weight, we assessed their ability to relate the weight of the different tools with their effectiveness and thus select the most effective one(s. Our results show that chimpanzees use weight alone in selecting tools to crack open nuts and that experience clearly affects the subjects' attentiveness to the tool properties that are relevant for the task at hand. Chimpanzees can encode the requirements that a nut-cracking tool should meet (in terms of weight to be effective.

  8. E-kursus nõuab aega ja pühendumist / Ivo Leito, Irja Helm, Anne Krull ; intervjueerinud Laura Vetik

    Index Scriptorium Estoniae

    Leito, Ivo, 1972-

    2015-01-01

    Intervjuu Tartu Ülikooli keemiakursuse "Estimation of Measurement Uncertainty in Chemical Analysis" autorite Ivo Leito ja Irja Helmiga ning Tartu Kutsehariduskeskuse e-kursuse "Praktiline keemia" autori Anne Krulliga

  9. Prediction of Instability for Miscible Displacements in a Hele-Shaw Cell Prévision de l'instabilité pour des déplacements miscibles dans une cellule Hele-Shaw

    Directory of Open Access Journals (Sweden)

    Coskuner G.

    2006-11-01

    Full Text Available A universal dimensionless scaling group and its critical value at the onset of instability for a miscible displacement in a Hele-Shaw cell is derived. The derivation is based on a variational technique and it is capable of considering, for the first time, the effect of the length of a Hele-Shaw cell on the criterion for the onset of instability. The theory is verified by comparing it with forty-four Hele-Shaw cell experiments. On calcule un groupe universel sans dimension de mise à l'échelle et sa valeur critique au départ de l'instabilité dans un déplacement miscible dans une cellule Hele-Shaw. Ce calcul est basé sur une technique variationnelle et permet, pour la première fois, de prendre en compte l'effet de la longueur d'une cellule Hele-Shaw sur le critère d'apparition d'instabilité. La théorie est vérifiée en la comparant avec des expériences réalisées avec quarante-quatre cellules Hele-Shaw.

  10. Bubbles and fingers in a Hele-Shaw cell: steady solutions

    CERN Document Server

    Vasconcelos, Giovani L

    2015-01-01

    Analytical solutions for both a finite assembly and a periodic array of bubbles steadily moving in a Hele-Shaw channel are presented. The particular case of multiple fingers penetrating into the channel and moving jointly with an assembly of bubbles is also analysed. The solutions are given by a conformal mapping from a multiply connected circular domain in an auxiliary complex plane to the fluid region exterior to the bubbles. In all cases the desired mapping is written explicitly in terms of certain special transcendental functions, known as the secondary Schottky-Klein prime functions. Taken together, the solutions reported here represent the complete set of solutions for steady bubbles (and fingers) in a horizontal Hele-Shaw channel when surface tension is neglected. All previous solutions under these assumptions are particular cases of the general solutions reported here. Other possible applications of the formalism described here are also discussed.

  11. Determining the number of fingers in the lifting Hele-Shaw problem

    Science.gov (United States)

    Miranda, Jose; Dias, Eduardo

    2013-11-01

    The lifting Hele-Shaw cell flow is a variation of the celebrated radial viscous fingering problem for which the upper cell plate is lifted uniformly at a specified rate. This procedure causes the formation of intricate interfacial patterns. Most theoretical studies determine the total number of emerging fingers by maximizing the linear growth rate, but this generates discrepancies between theory and experiments. In this work, we tackle the number of fingers selection problem in the lifting Hele-Shaw cell by employing the recently proposed maximum-amplitude criterion. Our linear stability analysis accounts for the action of capillary, viscous normal stresses, and wetting effects, as well as the cell confinement. The comparison of our results with very precise laboratory measurements for the total number of fingers shows a significantly improved agreement between theoretical predictions and experimental data. We thank CNPq (Brazilian Sponsor) for financial support.

  12. A Special Class of Univalent Functions in Hele-Shaw Flow Problems

    Directory of Open Access Journals (Sweden)

    Paula Curt

    2011-01-01

    Full Text Available We study the time evolution of the free boundary of a viscous fluid for planar flows in Hele-Shaw cells under injection. Applying methods from the theory of univalent functions, we prove the invariance in time of Φ-likeness property (a geometric property which includes starlikeness and spiral-likeness for two basic cases: the inner problem and the outer problem. We study both zero and nonzero surface tension models. Certain particular cases are also presented.

  13. Experimental Characterization of Immiscible Viscous Fingering in a Hele-Shaw Cell

    Science.gov (United States)

    MacMinn, C. W.; Szulczewski, M.; Cueto-Felgueroso, L.; Juanes, R.

    2009-12-01

    While an understanding of multiphase flow in porous media is critical to descriptions of CO2 sequestration, enhanced oil recovery, and NAPL migration, current models of multiphase flow do not capture flow instabilities that significantly impact transport. One such instability is viscous fingering: the tendency of a low-viscosity fluid to preferentially form narrow, finger-like channels through a high-viscosity fluid rather than displacing it uniformly. As a first step in the development of a new model for multiphase flow in porous media, we focus on a simpler system: two-phase displacement in a Hele-Shaw cell. Despite a large existing body of work on viscous fingering in the Hele-Shaw geometry, few experimental results are available to guide the development of a new theoretical model. For example, displacements at high capillary number or with low to moderate viscosity contrast are currently very poorly understood. This study is an experimental investigation of the displacement of a wetting fluid by a non-wetting fluid in a Hele-Shaw cell. We first study flows with large viscosity contrast and low capillary number, reproducing the well-known Saffman-Taylor finger and confirming that its width scales inversely with the square-root of the capillary number. Next, we study flow at higher capillary numbers to characterize the transition from stable Saffman-Taylor fingers to highly branched fingers (illustrated in figure). Lastly, we study fingering patters at low to moderate viscosity contrast and explore phenomena such as finger breaking and coalescence. Point injection of air into silicone oil in a Hele-Shaw cell at low viscosity ratio (strong viscosity contrast) and moderate capillary number (approximately M = 2E-4 and Ca = 0.5) leads to a branched fingering pattern very different from the classical Saffman-Taylor finger. Silicone oil is the wetting fluid.

  14. Marangoni induced force on a drop in a Hele Shaw cell

    OpenAIRE

    Gallaire, François; Meliga, Philippe; Laure, Patrice; Baroud, Charles N.

    2014-01-01

    International audience; We analyse the force balance on a cylindrical drop in a Hele-Shaw cell, subjected to a Marangoni flow caused by a surface tension gradient. Depth-averaged Stokes equations, called Brinkman equations, are introduced and a general closed form solution is obtained. The validity of the averaging procedure is ascertained by considering a linear surface tension gradient acting on a cylindrical flattened drop. The Marangoni-driven flow field and resulting force predicted by t...

  15. V og S deler hele paletten af fragmenterede værdier

    DEFF Research Database (Denmark)

    Nitschke, Henrik

    2007-01-01

    S og V adskiller sig fra de andre partier derved, at de som store folkelige partier i højere grad ser sig nødsaget til at repræsentere stort set hele den pt. tænkelige palet af værdimæssige ben, når de formulerer sig politisk 1) den kreative klasses insisteren på legende kreativitet som afgørende...

  16. Nanoscale manipulation of Ge nanowires by ion hammering

    Energy Technology Data Exchange (ETDEWEB)

    Picraux, Samuel T [Los Alamos National Laboratory; Romano, Lucia [UNIV OF FLORIDA; Rudawski, Nicholas G [UNIV OF FLORIDA; Holzworth, Monta R [UNIV OF FLORIDA; Jones, Kevin S [UNIV OF FLORIDA; Choi, S G [NREL

    2009-01-01

    Nanowires generated considerable interest as nanoscale interconnects and as active components of both electronic and electromechanical devices. However, in many cases, manipulation and modification of nanowires are required to realize their full potential. It is essential, for instance, to control the orientation and positioning of nanowires in some specific applications. This work demonstrates a simple method to reversibly control the shape and the orientation of Ge nanowires by using ion beams. Initially, crystalline nanowires were partially amorphized by 30 keY Ga+-implantation. After amorphization, viscous flow and plastic deformation occurred due to the ion hammering effect, causing the nanowires to bend toward the beam direction. The bending was reversed multiple times by ion-implanting the opposite side of the nanowires, resulting in straightening of the nanowires and subsequent bending in the opposite direction. This ion hammering effect demonstrates the detailed manipulation of nanoscale structures is possible through the use of ion irradiation.

  17. Effect of rotational speed in rotary hammer forging process

    Directory of Open Access Journals (Sweden)

    Hamdy Muhammad M

    2015-01-01

    Full Text Available Rotary press forging (RPF has been used in the last century, but it produces many defects in the forgings. The author has invented the rotary hammer forging (RHF process to reduce such defects. RHF is a multi-axes compression process where the material is partially and incrementally deformed by the action of several repeated hammering blows, while the produced deformation region is swept through the whole area of the workpiece. The aim of the present work is to study the effects of rotational speed on the forgings produced by RPF and RHF to compare between the two processes. It has been found that as the rotational speed increases the mushroom effect is constant in RHF while it is greater and increases in RPF. As the rotational speed increases, the twist angle increases in both RHF and RPF, but it is bigger in RPF. These results demonstrate the benefits of using RHF instead of RPF.

  18. Automated Grid Monitoring for the LHCb Experiment Through HammerCloud

    CERN Document Server

    Dice, Bradley

    2015-01-01

    The HammerCloud system is used by CERN IT to monitor the status of the Worldwide LHC Computing Grid (WLCG). HammerCloud automatically submits jobs to WLCG computing resources, closely replicating the workflow of Grid users (e.g. physicists analyzing data). This allows computation nodes and storage resources to be monitored, software to be tested (somewhat like continuous integration), and new sites to be stress tested with a heavy job load before commissioning. The HammerCloud system has been in use for ATLAS and CMS experiments for about five years. This summer's work involved porting the HammerCloud suite of tools to the LHCb experiment. The HammerCloud software runs functional tests and provides data visualizations. HammerCloud's LHCb variant is written in Python, using the Django web framework and Ganga/DIRAC for job management.

  19. Overview of Prevention for Water Hammer by Check Valve Action in Nuclear Reactor

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Dayong; Yoon, Hyungi; Seo, Kyoungwoo; Kim, Seonhoon [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2016-10-15

    Water hammer can cause serious damage to pumping system and unexpected system pressure rise in the pipeline. In nuclear reactor, water hammer can influence on the integrity of safety related system. Water hammer in nuclear reactor have been caused by voiding in normally water-filled lines, steam condensation line containing both steam and water, as well as by rapid check valve action. Therefore, this study focuses on the water hammer by check valve among the sources of water hammer occurrence and suggests proper methodology for check valve type selection against water hammer. This study focuses on the water hammer by check valve action among the sources of water hammer occurrence and suggests proper methodology for check valve type selection against water hammer. If the inadvertent pump trip or pipe rupture in high velocity and pressure pipe is predicted, the fast response check valve such as tiled disc, dual disc and nozzle check valve should be installed in the system. If the inadvertent pump trip or pipe rupture in very high velocity and pressure pipe and excessively large revered flow velocity are predicted, the very slowly closing check valve such as controlled closure check valve should be installed in the system.

  20. Hammering sound frequency analysis and prevention of intraoperative periprosthetic fractures during total hip arthroplasty.

    Science.gov (United States)

    Sakai, Rina; Kikuchi, Aki; Morita, Towa; Takahira, Naonobu; Uchiyama, Katsufumi; Yamamoto, Takeaki; Moriya, Mistutoshi; Uchida, Kentaro; Fukushima, Kensuke; Tanaka, Kensei; Takaso, Masashi; Itoman, Moritoshi; Mabuchi, Kiyoshi

    2011-01-01

    Adequate fixation at the time of cementless stem implantation depends on the operator's experience. An objective evaluation method to determine whether the stem has been appropriately implanted may be helpful. We studied the relationship between the hammering sound frequency during stem implantation and internal stress in a femoral model, and evaluated the possible usefulness of hammering sound frequency analysis for preventing intraoperative fracture. Three types of cementless stem (BiCONTACT®, SL-PLUS®, and AI-Hip®) were used. Surgeons performed stem insertion using a procedure similar to that employed in a routine operation. Stress was estimated by finite element analysis, the hammering force was measured, and frequency analysis of hammering sound data obtained using a microphone. Finite element analysis showed a decrease in the hammering sound frequency with an increase in the estimated maximum stress. When a decrease in frequency was observed, adequate hammering had occurred, and the continuation of hammering risked fracture. Based on the relationship between stress and frequency, the evaluation of changes in frequency may be useful for preventing the development of intraoperative fractures. Using our method, when a decrease in frequency is observed, the hammering force should be reduced. Hammering sound frequency analysis may allow the prediction of bone fractures that can be visually confirmed, and may be a useful objective evaluation method for the prevention of intraoperative periprosthetic fractures during stem insertion.

  1. Hypothenar Hammer Syndrome: Long-Term Results After Vascular Reconstruction.

    Science.gov (United States)

    Kitzinger, Hugo B; van Schoonhoven, Joerg; Schmitt, Rainer; Hacker, Stefan; Karle, Birgit

    2016-01-01

    Hypothenar hammer syndrome is a rare vascular lesion of the distal ulnar artery in Guyon tunnel caused by acute or repetitive blunt trauma to the hypothenar eminence. Described treatment options vary greatly, from nonoperative management treatments to surgical interventions. The aim of this study was to evaluate the long-term outcomes of patients after surgical reconstruction of the ulnar artery. In this retrospective study, the results of 12 patients treated for hypothenar hammer syndrome were evaluated. Preoperative and postoperative examinations of the hand were recorded. Function impairment was assessed with the "Disabilites of the Arm, Shoulder and Hand" questionnaire. Comparisons were also made based on ulnar artery patency versus occlusion. All patients were evaluated for ulnar artery patency as determined by Allen's test and magnetic resonance angiography. All patients were men with an average age of 42.8 years. In 3 patients, a direct end-to-end anastomosis of the ulnar artery was performed, and 9 patients received a reconstruction with a reverse interpositional vein graft. Nine vascular reconstructions remained patent after a mean follow-up period of 56.9 months. These patients had a complete or at least partial relief of their pain, dysesthesia, and cold intolerance compared with preoperatively. Patients with reoccluded ulnar arteries were statistically significant younger (P = 0.036) than patients with patent ulnar artery. They also had a higher pain level (P = 0.009) and a longer follow-up period (P = 0.036) than those with patent reconstruction. There was a trend for higher functional impairment in patients with reoccluded ulnar artery (P = 0.100). Smoking habits showed no influence on ulnar artery patency. For patients with symptomatic hypothenar hammer syndrome and failed nonoperative treatment, surgical intervention is a good option. After more than 4.5 years after surgery 9 of 12 vascular reconstructions remained patent (75% patency rate

  2. Simulation of water hammer phenomena using the system code ATHLET

    Energy Technology Data Exchange (ETDEWEB)

    Bratfisch, Christoph; Koch, Marco K. [Bochum Univ. (Germany). Reactor Simulation and Safety Group

    2017-07-15

    Water Hammer Phenomena can endanger the integrity of structures leading to a possible failure of pipes in nuclear power plants as well as in many industrial applications. These phenomena can arise in nuclear power plants in the course of transients and accidents induced by the start-up of auxiliary feed water systems or emergency core cooling systems in combination with rapid acting valves and pumps. To contribute to further development and validation of the code ATHLET (Analysis of Thermalhydraulics of Leaks and Transients), an experiment performed in the test facility Pilot Plant Pipework (PPP) at Fraunhofer UMSICHT is simulated using the code version ATHLET 3.0A.

  3. Liquid-Liquid Displacement Flows in a Hele-Shaw Cell including Viscoplastic Effects

    Science.gov (United States)

    de Souza Mendes, Paulo R.; Varges, Priscilla R.

    2008-07-01

    Viscous fingering in non-Newtonian fluids in a rectangular Hele-Shaw cell is investigated. This cell is filled with aqueous solutions of carbopol in two different concentrations. A Newtonian mineral oil is then injected into the cell and the displacement is observed. A digital camera is used to capture images of the interface between the fluids during the flow. Applications include displacement of heavy crude oil in reservoirs. The main parameters that govern this flow are the viscosity ratio, the rheological capillary number, and the (dimensionless) flow rate. The interface shape is given for two different values of flow rate and viscosity ratio.

  4. Premixed combustion of coconut oil in a hele-shaw cell

    Directory of Open Access Journals (Sweden)

    Hadi Saroso

    2014-12-01

    Full Text Available Coconut oil combustion characteristic is observed experimentally by evaporating oil in the boiler then mix it with air before being burned at various equivalence ratios in the Hele-shaw cell. The result shows that, coconut oil tends to break into glycerol and fatty acid due to hydrolysis reaction producing the flame propagation, where the fatty acid flame propagates first then glycerol flame. Micro-explosion occurs when moisture from fatty acid combustion is absorbed by glycerol and higher heating due to higher flame speed produces more micro-explosion.

  5. Õhtutähele : [luuletused] / William Blake ; tlk. Märt Väljataga

    Index Scriptorium Estoniae

    Blake, William

    2004-01-01

    Sisu: Õhtutähele ; Korstnapühkija ; Taevatõusmispüha : "See oli taevatõusmispäev, reas sajad lastepaarid..." ; Saviklomp ja kivike ; Taevatõusmispüha : "Kas on see mõni püha pilt..." ; Korstnapühkija ; Haige roos ; Armastuse aed ; London. Saatesõna lk. 12. Orig.: To the Evening Star ; The chimney sweeper ; Holy thursday (1789) ; The clod and pebble ; Holy thursday (1794) ; Holy thursday (1794) ; The sick rose ; The garden of love ; London

  6. Prey selection of a captive Oystercatcher Haematopus ostralegus hammering Mussels Mytilus edulis from the ventral side

    NARCIS (Netherlands)

    Ens, Bruno J.; Alting, D

    1996-01-01

    We studied prey choice of a captive Oystercatcher:hat hammered Mussels from the ventral side. The results replicate previous findings that ventral hammerers select Mussels of intermediate size, select against thick-shelled Mussels, abandon an increasing proportion of Mussels with increasing size and

  7. HAMMER FY 1999 multi-year work plan WBS 1.9

    Energy Technology Data Exchange (ETDEWEB)

    Callender, P.A.

    1998-09-30

    As a federal training center HAMMER`s [HAzardous Materials Management and Emergency Response] mission is to host, broker, and provide training with partners, involving hands-on use of realistic props and settings, in order to save lives and reduce injuries, increase worker productivity, and serve as a catalyst for a regional training industry.

  8. Vibration control in forge hammers. [by shock wave damping in foundation platform

    Science.gov (United States)

    Moise, F.; Lazarescu, C.

    1974-01-01

    Special measures are discussed for calculating, designing and executing a forge hammer foundation, so that the vibrations that occur during its working will not be transmitted to neighboring machinery, workrooms and offices. These vibrations are harmful to the workers near the forge hammer.

  9. Testing as a Service with HammerCloud

    Science.gov (United States)

    Medrano Llamas, Ramón; Barrand, Quentin; Elmsheuser, Johannes; Legger, Federica; Sciacca, Gianfranco; Sciabà, Andrea; van der Ster, Daniel

    2014-06-01

    HammerCloud was designed and born under the needs of the grid community to test the resources and automate operations from a user perspective. The recent developments in the IT space propose a shift to the software defined data centres, in which every layer of the infrastructure can be offered as a service. Testing and monitoring is an integral part of the development, validation and operations of big systems, like the grid. This area is not escaping the paradigm shift and we are starting to perceive as natural the Testing as a Service (TaaS) offerings, which allow testing any infrastructure service, such as the Infrastructure as a Service (IaaS) platforms being deployed in many grid sites, both from the functional and stressing perspectives. This work will review the recent developments in HammerCloud and its evolution to a TaaS conception, in particular its deployment on the Agile Infrastructure platform at CERN and the testing of many IaaS providers across Europe in the context of experiment requirements. The first section will review the architectural changes that a service running in the cloud needs, such an orchestration service or new storage requirements in order to provide functional and stress testing. The second section will review the first tests of infrastructure providers on the perspective of the challenges discovered from the architectural point of view. Finally, the third section will evaluate future requirements of scalability and features to increase testing productivity.

  10. Hammer events, neutrino energies, and nucleon-nucleon correlations

    CERN Document Server

    Weinstein, L B; Piasetzky, E

    2016-01-01

    Neutrino oscillation measurements depend on a difference between the rate of neutrino-nucleus interactions at different neutrino energies or different distances from the source. Knowledge of the neutrino energy spectrum and neutrino-detector interactions are crucial for these experiments. Short range nucleon-nucleon correlations in nuclei (SRC) affect properties of nuclei. The ArgoNeut liquid Argon Time Projection Chamber (lArTPC) observed neutrino-argon scattering events with two protons back-to-back in the final state ("hammer" events) which they associated with SRC pairs. The MicroBoone lArTPC will measure far more of these events. We simulate hammer events using two simple models. We use the well-known electron-nucleon cross section to calculate e-argon interactions where the e- scatters from a proton, ejecting a pi+, and the pi+ is then absorbed on a moving deuteron-like $np$ pair. We also use a model where the electron excites a nucleon to a Delta, which then deexcites by interacting with a second nucle...

  11. Testing as a Service with HammerCloud

    CERN Document Server

    Medrano Llamas, Ramón; Elmsheuser, Johannes; Legger, Federica; Sciacca, Gianfranco; Sciabà, Andrea; van der Ster, Daniel

    2014-01-01

    HammerCloud was designed and born under the needs of the grid community to test the resources and automate operations from a user perspective. The recent developments in the IT space propose a shift to the software defined data centres, in which every layer of the infrastructure can be offered as a service. Testing and monitoring is an integral part of the development, validation and operations of big systems, like the grid. This area is not escaping the paradigm shift and we are starting to perceive as natural the Testing as a Service (TaaS) offerings, which allow testing any infrastructure service, such as the Infrastructure as a Service (IaaS) platforms being deployed in many grid sites, both from the functional and stressing perspectives. This work will review the recent developments in HammerCloud and its evolution to a TaaS conception, in particular its deployment on the Agile Infrastructure platform at CERN and the testing of many IaaS providers across Europe in the context of experiment requirements....

  12. INTEGRATED DRILLING SYSTEM USING MUD ACTUATED DOWN HOLE HAMMER AS PRIMARY ENGINE

    Energy Technology Data Exchange (ETDEWEB)

    John V. Fernandez; David S. Pixton

    2005-12-01

    A history and project summary of the development of an integrated drilling system using a mud-actuated down-hole hammer as its primary engine are given. The summary includes laboratory test results, including atmospheric tests of component parts and simulated borehole tests of the hammer system. Several remaining technical hurdles are enumerated. A brief explanation of commercialization potential is included. The primary conclusion for this work is that a mud actuated hammer can yield substantial improvements to drilling rate in overbalanced, hard rock formations. A secondary conclusion is that the down-hole mud actuated hammer can serve to provide other useful down-hole functions including generation of high pressure mud jets, generation of seismic and sonic signals, and generation of diagnostic information based on hammer velocity profiles.

  13. Spiral pattern in a radial displacement in a Hele-Shaw cell

    Science.gov (United States)

    Ban, Mitsumasa; Nagatsu, Yuichiro; Hayashi, Atsushi; Kato, Yoshihiro; Tada, Yutaka

    2008-11-01

    When a reactive and miscible less-viscous liquid displaces a more-viscous liquid in a Hele-Shaw cell, reactive miscible viscous fingering takes place. We have experimentally shown that the pattern created by the displacement of a more-viscous fluid by a less-viscous one in a radial Hele-Shaw cell develops not radially but spirally when a more-viscous sodium polyacrylate solution is displaced by a less-viscous trivalent iron ion (Fe^3+) solution with a sufficiently high concentration of Fe^3+. Another experiment in order to investigate the mechanism of spiral pattern formation revealed that an instantaneous chemical reaction takes place between the two fluids and at high Fe^3+ concentrations it produces a film of the gel at the contact plane. The gel is formed by three-dimensional network structures between the polyacrylate solution and the trivalent iron ion (Fe^3+) solution. We have proposed a physical model that the gel's film is responsible for the form of the spiral pattern.

  14. 76 FR 52313 - Heavy Forged Hand Tools (i.e., Axes & Adzes, Bars & Wedges, Hammers & Sledges, and Picks...

    Science.gov (United States)

    2011-08-22

    ... International Trade Administration Heavy Forged Hand Tools (i.e., Axes & Adzes, Bars & Wedges, Hammers & Sledges... & Adzes, Bars & Wedges, Hammers & Sledges, and Picks & Mattocks) (``Hand Tools'') from the People's... & Wedges, Hammers & Sledges, and Picks & Mattocks) From the People's Republic of China: Final Results of...

  15. A numerical water-hammer model using Scilab

    Directory of Open Access Journals (Sweden)

    Wilson Rodríguez Calderón

    2010-04-01

    Full Text Available A water hammer can produce severe consequences regarding pipe integrity; simulation thus becomes an es-sential requirement for ensuring proper water distribution system design and operation. This article thus tries to demonstrate the importance of numerical methods in resolving such problems. A Scilab code allowing pressure propagation to be represented using the characteristics’ method applied to a case of classic literature was thus developed for numerically simulating this phenomenon. This method uses a finite difference scheme for resolving mass and momentum equations. The article presents equations governing the problem from the numerical point of view, the phenomenon’s behaviour is analysed and results obtained by the numerical approach (calculating finite differences are compared to those obtained with Scilab and the theoretical solution.

  16. Follow-up of hearing thresholds among forge hammering workers

    Energy Technology Data Exchange (ETDEWEB)

    Kamal, A.A.; Mikael, R.A.; Faris, R. (Ain Shams Univ., Abbasia, Cairo (Egypt))

    1989-01-01

    Hearing threshold was reexamined in a group of forge hammering workers investigated 8 years ago with consideration of the age effect and of auditory symptoms. Workers were exposed to impact noise that ranged from 112 to 139 dB(A)--at an irregular rate of 20 to 50 drop/minute--and a continuous background noise that ranged from 90 to 94 dB(A). Similar to what was observed 8 years ago, the present permanent threshold shift (PTS) showed a maximum notch at the frequency of 6 kHz and considerable elevations at the frequencies of 0.25-1 kHz. The age-corrected PTS and the postexposure hearing threshold were significantly higher than the corresponding previous values at the frequencies 0.25, 0.5, 1, and 8 kHz only. The rise was more evident at the low than at the high frequencies. Temporary threshold shift (TTS) values were significantly less than those 8 years ago. Contrary to the previous TTS, the present TTS were higher at low than at high frequencies. Although progression of PTS at the frequencies 0.25 and 0.5 kHz was continuous throughout the observed durations of exposure, progression at higher frequencies occurred essentially in the first 10 to 15 years of exposure. Thereafter, it followed a much slower rate. Tinnitus was significantly associated with difficulty in hearing the human voice and with elevation of PTS at all the tested frequencies, while acoustic after-image was significantly associated with increment of PTS at the frequencies 0.25-2 kHz. No relation between PTS and smoking was found. PTS at low frequencies may provide an indication of progression of hearing damage when the sensitivity at 6 and 4 kHz diminishes after prolonged years of exposure. Tinnitus and acoustic after-image are related to the auditory effect of forge hammering noise.

  17. The effect of surface tension on steadily translating bubbles in an unbounded Hele-Shaw cell.

    Science.gov (United States)

    Green, Christopher C; Lustri, Christopher J; McCue, Scott W

    2017-05-01

    New numerical solutions to the so-called selection problem for one and two steadily translating bubbles in an unbounded Hele-Shaw cell are presented. Our approach relies on conformal mapping which, for the two-bubble problem, involves the Schottky-Klein prime function associated with an annulus. We show that a countably infinite number of solutions exist for each fixed value of dimensionless surface tension, with the bubble shapes becoming more exotic as the solution branch number increases. Our numerical results suggest that a single solution is selected in the limit that surface tension vanishes, with the scaling between the bubble velocity and surface tension being different to the well-studied problems for a bubble or a finger propagating in a channel geometry.

  18. Shocks and finite-time singularities in Hele-Shaw flow

    Energy Technology Data Exchange (ETDEWEB)

    Teodorescu, Razvan [Los Alamos National Laboratory; Wiegmann, P [UNIV OF MONTREAL; Lee, S-y [UNIV OF CHICAGO

    2008-01-01

    Hele-Shaw flow at vanishing surface tension is ill-defined. In finite time, the flow develops cusplike singularities. We show that the ill-defined problem admits a weak dispersive solution when singularities give rise to a graph of shock waves propagating in the viscous fluid. The graph of shocks grows and branches. Velocity and pressure jump across the shock. We formulate a few simple physical principles which single out the dispersive solution and interpret shocks as lines of decompressed fluid. We also formulate the dispersive solution in algebro-geometrical terms as an evolution of Krichever-Boutroux complex curve. We study in details the most generic (2,3) cusp singularity which gives rise to an elementary branching event. This solution is self-similar and expressed in terms of elliptic functions.

  19. Wavelength selection in injection-driven Hele-Shaw flows: A maximum amplitude criterion

    Science.gov (United States)

    Dias, Eduardo; Miranda, Jose

    2013-11-01

    As in most interfacial flow problems, the standard theoretical procedure to establish wavelength selection in the viscous fingering instability is to maximize the linear growth rate. However, there are important discrepancies between previous theoretical predictions and existing experimental data. In this work we perform a linear stability analysis of the radial Hele-Shaw flow system that takes into account the combined action of viscous normal stresses and wetting effects. Most importantly, we introduce an alternative selection criterion for which the selected wavelength is determined by the maximum of the interfacial perturbation amplitude. The effectiveness of such a criterion is substantiated by the significantly improved agreement between theory and experiments. We thank CNPq (Brazilian Sponsor) for financial support.

  20. Fingering of exothermic reaction-diffusion fronts in Hele-Shaw cells with conducting walls.

    Science.gov (United States)

    D'Hernoncourt, J; Kalliadasis, S; De Wit, A

    2005-12-15

    We consider the influence of heat losses through the walls of a Hele-Shaw cell on the linear stability and nonlinear dynamics of exothermic chemical fronts whose solutal and thermal contributions to density changes have the same signs. Our analysis is based on the reaction-diffusion-convection equations obtained from the Darcy-Boussinesq approximation. The parameters governing the equations are the Damkohler number, a kinetic parameter d, the Lewis number Le, the thermal-expansion coefficient gammaT, and a heat-transfer coefficient alpha which measures heat losses through the walls. We show that for thermally insulating walls, the temperature profile is a front that follows the concentration profile, while in the presence of heat losses, the temperature profile becomes a pulse that leads to a nonmonotonic density profile which in turn may lead to a destabilization of an otherwise stable front.

  1. Electroosmotic flow in Hele-Shaw configurations with non-uniform surface charge

    CERN Document Server

    Boyko, Evgeniy; Gat, Amir D; Bercovici, Moran

    2015-01-01

    We present an analytical study, validated by numerical simulations, of electroosmotic flow in a Hele-Shaw cell with non-uniform surface charge patterning. Applying the lubrication approximation and assuming thin electric double layer, we obtain a pair of uncoupled Poisson equations which relate the pressure and the stream function, respectively, to gradients in the zeta potential distribution parallel and perpendicular to the applied electric field. We solve the governing equations for the fundamental case of a disk with uniform zeta potential and show that the flow-field in the outer region takes the form of a pure dipole. We illustrate the ability to generate complex flow-fields around smooth convex regions by superposition of such disks with uniform zeta potential and a uniform pressure driven flow. This method may be useful for future on-chip devices, allowing flow control without the need for mechanical components.

  2. Fundamental investigation of foam flow in a liquid-filled Hele-Shaw cell.

    Science.gov (United States)

    Osei-Bonsu, Kofi; Shokri, Nima; Grassia, Paul

    2016-01-15

    The relative immobility of foam in porous media suppresses the formation of fingers during oil displacement leading to a more stable displacement which is desired in various processes such as Enhanced Oil Recovery (EOR) or soil remediation practices. Various parameters may influence the efficiency of foam-assisted oil displacement such as properties of oil, the permeability and heterogeneity of the porous medium and physical and chemical characteristics of foam. In the present work, we have conducted a comprehensive series of experiments using customised Hele-Shaw cells filled with either water or oil to describe the effects of foam quality, permeability of the cell as well as the injection rate on the apparent viscosity of foam which is required to investigate foam displacement. Our results reveal the significant impact of foam texture and bubble size on the foam apparent viscosity. Foams with smaller bubble sizes have a higher apparent viscosity. This statement only applies (strictly speaking) when the foam quality is constant. However, wet foams with smaller bubbles may have lower apparent viscosity compared to dry foams with larger bubbles. Furthermore, our results show the occurrence of more stable foam-water fronts as foam quality decreases. Besides, the complexity of oil displacement by foam as well as its destabilizing effects on foam displacement has been discussed. Our results extend the physical understanding of foam-assisted liquid displacement in Hele-Shaw cell which is a step towards understanding the foam flow behaviour in more complex systems such as porous media. Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved.

  3. A study of gas bubbles in liquid mercury in a vertical Hele-Shaw cell

    Science.gov (United States)

    Klaasen, B.; Verhaeghe, F.; Blanpain, B.; Fransaer, J.

    2014-01-01

    High-quality observations of mesoscopic gas bubbles in liquid metal are vital for a further development of pyrometallurgical gas injection reactors. However, the opacity of metals enforces the use of indirect imaging techniques with limited temporal or spatial resolution. In addition, accurate interface tracking requires tomography which further complicates the design of a high-temperature experimental setup. In this paper, an alternative approach is suggested that circumvents these two main restrictions. By injecting gas in a thin layer of liquid metal entrapped between two flat and closely spaced plates, bubbles in a Hele-Shaw flow regime are generated. The resulting quasi-2D multiphase flow phenomena can be fully captured from a single point of view and, when using a non-wetted transparent plate material, the bubbles can be observed directly. The feasibility of this approach is demonstrated by observations on buoyancy-driven nitrogen bubbles in liquid mercury in a vertical Hele-Shaw cell. By using a moving high-speed camera to make continuous close up recordings of individual bubbles, the position and geometry of these bubbles are quantified with a high resolution along their entire path. After a thorough evaluation of the experimental accuracy, this information is used for a detailed analysis of the bubble expansion along the path. While the observed bubble growth is mainly caused by the hydrostatic pressure gradient, a careful assessment of the volume variations for smaller bubbles shows that an accurate bubble description should account for significant dynamic pressure variations that seem to be largely regime dependent.

  4. A study of gas bubbles in liquid mercury in a vertical Hele-Shaw cell

    Energy Technology Data Exchange (ETDEWEB)

    Klaasen, B.; Blanpain, B. [KU Leuven, Research Group for High Temperature Processes and Industrial Ecology, Department of Metallurgy and Materials Engineering, Leuven (Belgium); Verhaeghe, F. [KU Leuven, Research Group for High Temperature Processes and Industrial Ecology, Department of Metallurgy and Materials Engineering, Leuven (Belgium); Umicore Group Research and Development, Olen (Belgium); Fransaer, J. [KU Leuven, Research Group for Materials with Novel Functionality, Department of Metallurgy and Materials Engineering, Leuven (Belgium)

    2014-01-15

    High-quality observations of mesoscopic gas bubbles in liquid metal are vital for a further development of pyrometallurgical gas injection reactors. However, the opacity of metals enforces the use of indirect imaging techniques with limited temporal or spatial resolution. In addition, accurate interface tracking requires tomography which further complicates the design of a high-temperature experimental setup. In this paper, an alternative approach is suggested that circumvents these two main restrictions. By injecting gas in a thin layer of liquid metal entrapped between two flat and closely spaced plates, bubbles in a Hele-Shaw flow regime are generated. The resulting quasi-2D multiphase flow phenomena can be fully captured from a single point of view and, when using a non-wetted transparent plate material, the bubbles can be observed directly. The feasibility of this approach is demonstrated by observations on buoyancy-driven nitrogen bubbles in liquid mercury in a vertical Hele-Shaw cell. By using a moving high-speed camera to make continuous close up recordings of individual bubbles, the position and geometry of these bubbles are quantified with a high resolution along their entire path. After a thorough evaluation of the experimental accuracy, this information is used for a detailed analysis of the bubble expansion along the path. While the observed bubble growth is mainly caused by the hydrostatic pressure gradient, a careful assessment of the volume variations for smaller bubbles shows that an accurate bubble description should account for significant dynamic pressure variations that seem to be largely regime dependent. (orig.)

  5. Novel Highly Efficient Compact Rotary-Hammering Planetary Sampler Actuated by a Single Piezoelectric Actuator Project

    Data.gov (United States)

    National Aeronautics and Space Administration — We had two objectives in this task: 1. Develop effective single low-mass, low-power piezoelectric drive that can actuate rotary-hammer samplers through walls. 2....

  6. The Seaplane Base Ivo Monti at S. Nicola Varano (fg): a Monument of Military Archeology, Between History and Protection

    Science.gov (United States)

    Mariano, F.; Saracco, M.; Petetta, L.

    2017-05-01

    Built in the years between 1915 and 1918, and located on the west bank of the "Varano" Lake, a bay running along the village of "Cagnano Varano", the "Ivo Monti" seaplane base was erected on a pre-existing medieval settlement which belonged to the Benedictine Monks from the town of "San Nicola Imbuti". During WWI, this seaplane base was turned, from a simple water airport, into a strategic military base for floatplanes. As a matter of fact, the large lagoon could be used as landing spot for the planes sent off to patrol the dalmatic coast, one of the historical regions of Croatia, then controlled by the Austrians. After WWI, after the seaplane became an outdated technology, the "Ivo Monti" base was progressively dismantled and then totally abandoned at the beginning of the 1950s. In 2014, considering the historical relevance of this site and the unmistakable architectural value of its elements, a research framework agreement was signed between the "DICEA" Department of Marche Polytechnic University and the city council of the town hosting the site, aimed at the development of shared scientific research projects revolving around the study, the valorisation, and the restoration of the military complex in question, which had been in a complete state of decay and neglect for too long. The still ongoing research project mentioned presents two main missions: the first is the historical reconstruction, the geometric mapping, and the robustness analysis of the ruins, by studying and faithfully representing the state of deterioration of the building materials and of the facilities; the second is the identification and the testing of potential architectural solutions for the conversion and the reuse of the site and of its facilities.

  7. Perbandingan Produktivitas Alat Hydraulic Hammer Dan Jack in Pile Di Surabaya

    OpenAIRE

    Tedjokusumo, Risanto; Goenawan, Verryanto; Wulandari, Paravita S; Kusuma, Jonathan Hendra

    2013-01-01

    Pelaksanaan pemancangan untuk pondasi suatu bangunan merupakan elemen penting yang dilakukan pada awal pembangunan. Produktivitas dari pelaksanaan pemancangan di setiap wilayah berbeda – beda tergantung pada wilayah dan alat pancangnya yaitu hydraulic hammer dan jack in pile. Faktor - faktor yang mempengaruhi produktivitas dari setiap alat berbeda antara alat kedua alat tersebut. Penelitian dilakukan dengan mengumpulkan data pemancangan dengan alat hydraulic hammer dan jack in pile dari proye...

  8. Design of a water-powered DTH hammer for deep drilling application

    Science.gov (United States)

    Cho, Min Jae; Kim, Donguk; Oh, Joo Young; Yook, Se-Jin; Kim, Young Won

    2017-11-01

    A DTH (Down-the-hole) hammer powered by highly pressurized fluid is a drilling tool using the motion of percussion of a drill bit. In retrospect, a DTH by using compressed air as a power source has been widely used in drilling industries such as applications of mining, geothermal etc. On the other hand, another type of a DTH that uses pressurized water, called a water hammer, has recently seen deep drilling applications, while it has been rarely investigated. In this study, we designed a water-powered DTH hammer which mainly consists of several components such as a piston, a poppet valve, a cap and a bit for deep drilling applications. We optimized the components of the hammer on the basis of the results of 1D analysis using commercial software of AMESIM. An experimental study has been also conducted to investigate a performance of the designed water hammer. We measured a pressure distribution inside the hammer system as a function of time, and it thus estimates a frequency of impaction of the bit, which has been also analyzed in frequency domain. In addition, some important parameters have been discussed in conjunction with a limitation of impaction frequency as input pressure. We believe that this study provides design rules of a water-based DTH for deep drilling applications. This work is supported by KITECH of Korean government.

  9. Responses of a Highly Accelerated Life Test System to Impacts from Different Designs of Hammers

    Directory of Open Access Journals (Sweden)

    Yeong-Shu Chen

    2014-08-01

    Full Text Available The response of a table to the impact of its driving hammer in the highly accelerated life test (HALT system depends on, among other things, the location of the hammer, the presence of multiple hammers, and the angle at which the hammer is mounted to the table. The present study investigated the response of a table to a variety of impacts from different combinations of hammers. It began with a theoretical analysis of the forces of impact exerted by hammers which led to the calculation of the corresponding displacement. These theoretical calculations revealed the mechanics of the HALT system to help explain the working principles behind this complex system. Then a simulation model was built to check the accuracy of the theoretical results. Finally, the accelerations of a table in a real HALT system were measured. These data showed good agreement with the experimental results and computer simulation. The responses of HALT systems have not been investigated thoroughly to date. The current study can help equipment designers and end users better understand the working principles of this kind of systems. It can be considered a breakthrough in terms of improving the performance of reliability testing with this kind of system.

  10. Impact hammer test of ITER blanket remote handling system

    Energy Technology Data Exchange (ETDEWEB)

    Noguchi, Yuto, E-mail: noguchi.yuto@jaea.go.jp; Maruyama, Takahito; Ueno, Kenichi; Komai, Masafumi; Takeda, Nobukazu; Kakudate, Satoshi

    2016-11-01

    An impact hammer test of the full-scale mock-up of the ITER blanket remote handling system (BRHS) was carried out to validate the results of the seismic analysis of the BRHS which were performed using a finite element (FE) model. As the FE analysis of the BRHS predicted a vertical mode ∼8 Hz, which coincides with a major natural frequency of the vacuum vessel of ITER, evaluating the dynamic response of the BRHS experimentally and measuring the system's damping is indispensable in verifying the structural design of the system. Recent preliminary impact testing on the full-scale mock-up of the BRHS showed that the mock-up has a vertical major natural mode having a natural frequency of ∼7.5 Hz and a damping ratio of 0.5%. Several other major natural modes having frequencies less than 10 Hz were found to have damping ratios ranging from 0.2% to 2%. It was confirmed that the natural major frequencies obtained in the experiments are in agreement with the major frequencies obtained via analysis.

  11. Effects of fatigue on intermuscular coordination during repetitive hammering.

    Science.gov (United States)

    Cote, Julie N; Feldman, Anatol G; Mathieu, Pierre A; Levin, Mindy F

    2008-04-01

    Fatigue affects the capacity of muscles to generate forces and is associated with characteristic changes in EMG signals. It may also influence interjoint and intermuscular coordination. To understand better the global effects of fatigue on multijoint movement, we studied movement kinematics and EMG changes in healthy volunteers asked to hammer repetitively. Movement kinematics and the activity of 20 muscles of the arm, trunk, and leg were recorded before and after subjects became fatigued (as measured using a Borg scale). When fatigue was reached, maximal grip strength and elbow range of motion decreased while the EMG amplitude of the contralateral external oblique muscle was increased. Fatigue did not affect shoulder and wrist kinematics or movement frequency. Results suggest that fatigue influences motion at both local and global levels. Specifically, interjoint and intermuscular coordination adapt to compensate for local effects of fatigue and to maintain key movement characteristics, such as the trajectory of the end effector and the movement frequency. Nonlocal compensations may be a focus of future studies of how fatigue affects complex movements such as those typically performed in the workplace.

  12. Color management with a hammer: the B-spline fitter

    Science.gov (United States)

    Bell, Ian E.; Liu, Bonny H. P.

    2003-01-01

    To paraphrase Abraham Maslow: If the only tool you have is a hammer, every problem looks like a nail. We have a B-spline fitter customized for 3D color data, and many problems in color management can be solved with this tool. Whereas color devices were once modeled with extensive measurement, look-up tables and trilinear interpolation, recent improvements in hardware have made B-spline models an affordable alternative. Such device characterizations require fewer color measurements than piecewise linear models, and have uses beyond simple interpolation. A B-spline fitter, for example, can act as a filter to remove noise from measurements, leaving a model with guaranteed smoothness. Inversion of the device model can then be carried out consistently and efficiently, as the spline model is well behaved and its derivatives easily computed. Spline-based algorithms also exist for gamut mapping, the composition of maps, and the extrapolation of a gamut. Trilinear interpolation---a degree-one spline---can still be used after nonlinear spline smoothing for high-speed evaluation with robust convergence. Using data from several color devices, this paper examines the use of B-splines as a generic tool for modeling devices and mapping one gamut to another, and concludes with applications to high-dimensional and spectral data.

  13. Numerical and experimental investigations of water hammers in nuclear industry

    Directory of Open Access Journals (Sweden)

    R Messahel

    2016-10-01

    Full Text Available In nuclear and petroleum industries, supply pipes are often exposed to high pressure loading which can cause to the structure high strains, plasticity and even, in the worst scenario, failure. Fast Hydraulic Transient phenomena such as Water Hammers (WHs are of this type. It generates a pressure wave that propagates in the pipe causing high stress. Such phenomena are of the order of few msecs and numerical simulation can offer a better understanding and an accurate evaluation of the dynamic complex phenomenon including fluid-structure interaction, multi-phase flow, cavitation … For the last decades, the modeling of phase change taking into account the cavitation effects has been at the centre of many industrial applications (chemical engineering, mechanical engineering, … and has a direct impact on the industry as it might cause damages to the installation (pumps, propellers, control valves, …. In this paper, numerical simulation using FSI algorithm and One-Fluid Cavitation models ("Cut-Off" and "HEM (Homogeneous Equilibrium Model Phase-Change" introduced by Saurel et al. [1] of WHs including cavitation effects is presented.

  14. Effect of impulse vibration and noise on vasomotor function of peripheral blood vessels among pneumatic forge hammer operators.

    Science.gov (United States)

    Solecki, L

    1995-01-01

    An evaluation of the effect of impulse vibration and noise on vasomotor function of blood vessels among pneumatic forge hammer operators has been presented based on thermal tests (cooling). The study covered the following groups of workers; pneumatic forge hammer operators (I), pneumatic forging hammer operators (II), hammer operator's assistants (III), operators of forging presses and machines (IV) and the control group. The results of the study showed that in groups I and III it was impulse noise not vibration that caused changes in the functioning of peripheral blood vessels.

  15. Hypothenar hammer syndrome from ice hockey stick-handling.

    Science.gov (United States)

    Zayed, Mohamed A; McDonald, Joey; Tittley, Jacques G

    2013-11-01

    Ulnar artery thrombosis and hypothenar hammer syndrome are rare vascular complications that could potentially occur with repeated blows or trauma to the hand. Although initially reported as an occupational hazard among laborers and craftsmen, it has been observed more recently among recreationalists and athletes. Until now, it has never been reported as a complication in ice hockey players. In this case report, a 26-year-old Canadian professional ice hockey player presented with acute dominant right hand paleness, coolness, and pain with hand use. The patient used a wooden hockey stick with a large knob of tape at the end of the handle, which he regularly gripped in the palm of his right hand to help with face-offs and general stick-handling. Sonographic evaluation demonstrated no arterial flow in the distal right ulnar artery distribution, and ulnar artery occlusion with no aneurysmal degeneration was confirmed by magnetic resonance angiogram. Intraarterial thrombolytic therapy was initiated, and subsequent serial angiograms demonstrated significant improvement in distal ulnar artery flow as well as recanalization of right hand deep palmar arch and digital arteries. The patient's symptoms resolved, and he was maintained on therapeutic anticoagulation for 3 months prior to returning to playing ice hockey professionally, but with a padded glove and no tape knob at the handle tip. This case highlights a unique presentation of hockey stick-handling causing ulnar artery thrombosis that was likely from repeated palmar hypothenar trauma. Appropriate diagnostic imaging, early intraarterial thrombolysis, and postoperative surveillance and follow-up were crucial for the successful outcome in this patient. Copyright © 2013 Elsevier Inc. All rights reserved.

  16. Bubble dynamics inside an outgassing hydrogel confined in a Hele-Shaw cell.

    Science.gov (United States)

    Haudin, Florence; Noblin, Xavier; Bouret, Yann; Argentina, Médéric; Raufaste, Christophe

    2016-08-01

    We report an experimental study of bubble dynamics in a non-Newtonian fluid subjected to a pressure decrease. The fluid is a hydrogel, composed of water and a synthetic clay, prepared and sandwiched between two glass plates in a Hele-Shaw geometry. The rheological properties of the material can be tuned by the clay concentration. As the imposed pressure decreases, the gas initially dissolved in the hydrogel triggers bubble formation. Different stages of the process are observed: bubble nucleation, growth, interaction, and creation of domains by bubble contact or coalescence. Initially bubble behave independently. They are trapped and advected by the mean deformation of the hydrogel, and the bubble growth is mainly driven by the diffusion of the dissolved gas through the hydrogel and its outgassing at the reactive-advected hydrogel-bubble interface. In this regime, the rheology of the fluid does not play a significant role on the bubble growth. A model is proposed and gives a simple scaling that relates the bubble growth rate and the imposed pressure. Carbon dioxide is shown to be the gas at play, and the hydrogel is degassing at the millimeter scale as a water solution does at a smaller scale. Later, bubbles are not independent anymore. The growth rate decreases, and the morphology becomes more anisotropic as bubbles interact because they are separated by a distance smaller than the individual stress field extension. Our measurements show that the interaction distance scales with the bubbles' size.

  17. A pancake droplet translating in a Hele-Shaw cell: lubrication film and flow field

    CERN Document Server

    Zhu, Lailai

    2016-01-01

    We adopt a boundary integral method to study the dynamics of a translating droplet confined in a Hele-Shaw cell in the Stokes regime. The droplet is driven by an ambient fluid with the same viscosity. We characterise the three-dimensional (3D) nature of the droplet interface and of the flow field. The interface develops an arc-shaped ridge near the rear-half rim with a protrusion in the rear and a laterally symmetric pair of higher peaks; this pair of protrusions has been identified by the recent experiments (Huerre et al. 2015) and predicted asymptotically (Burgess & Foster 1990). The mean film thickness is well predicted by the extended Bretherton model (Klaseboer et al. 2014) with fitting parameters. The flow in the streamwise wall-normal middle plane is featured with recirculating zones, which are partitioned by stagnation points closely resembling those of a two-dimensional droplet in a channel. Recirculation is absent in the wall-parallel, unconfined, planes, in sharp contrast to the interior flow i...

  18. Observing Nitrogen Bubbles in Liquid Zinc in a Vertical Hele-Shaw Cell

    Science.gov (United States)

    Klaasen, Bart; Verhaeghe, Frederik; Blanpain, Bart; Fransaer, Jan

    2015-04-01

    Observations of gas bubbles in liquid metal are strongly hindered by the opacity of metals. To circumvent this limitation, the authors recently proposed to study such systems under quasi-2D flow conditions in a Hele-Shaw cell. The current paper presents a successful application of this approach for nitrogen bubbles in liquid zinc at 973 K (700 °C) in a fused quartz cell with a thickness of 1.5 mm. At low oxygen levels, the cell walls are not wetted by the liquid zinc, and bubbles can be observed directly through the transparent cell walls. Furthermore, using a moving high-speed camera that travels upwards with the bubbles, their properties are quantified in detail along the entire trajectory. In the range of equivalent diameters between 5.9 and 9.0 mm, this reveals a single periodic flow regime in which bubbles follow a sinusoidal path with a characteristic frequency of 3.31 Hz. In addition, systematic intermediate accelerations are observed of which the origin remains unexplained. Considering the unprecedented resolution of such observations for bubbles in liquid metals, especially at high temperatures, it is expected that this approach will contribute to a better understanding of the mechanisms that govern gas injection in pyrometallurgy.

  19. Volume-of-fluid simulations of bubble dynamics in a vertical Hele-Shaw cell

    Science.gov (United States)

    Wang, Xue; Klaasen, Bart; Degrève, Jan; Mahulkar, Amit; Heynderickx, Geraldine; Reyniers, Marie-Françoise; Blanpain, Bart; Verhaeghe, Frederik

    2016-05-01

    Bubbles in confined geometries serve an important role for industrial operations involving bubble-liquid interactions. However, high Reynolds number bubble dynamics in confined flows are still not well understood due to experimental challenges. In the present paper, combined experimental and numerical methods are used to provide a comprehensive insight into these dynamics. The bubble behaviour in a vertical Hele-Shaw cell is investigated experimentally with a fully wetting liquid for a variety of gap thicknesses. A numerical model is developed using the volume of fluid method coupled with a continuum surface force model and a wall friction model. The developed model successfully simulates the dynamics of a bubble under the present experimental conditions and shows good agreement between experimental and simulation results. It is found that with an increased spacing between the cell walls, the bubble shape changes from oblate ellipsoid and spherical-cap to more complicated shapes, while the bubble path changes from only rectilinear to a combination of oscillating and rectilinear; the bubble drag coefficient decreases and this results in a higher bubble velocity caused by a lower pressure exerted on the bubble; the wake boundary and wake length evolve gradually accompanied by vortex formation and shedding.

  20. Interfacial elastic fingering in Hele-Shaw cells: A weakly nonlinear study

    KAUST Repository

    Carvalho, Gabriel D.

    2013-11-11

    We study a variant of the classic viscous fingering instability in Hele-Shaw cells where the interface separating the fluids is elastic, and presents a curvature-dependent bending rigidity. By employing a second-order mode-coupling approach we investigate how the elastic nature of the interface influences the morphology of emerging interfacial patterns. This is done by focusing our attention on a conventionally stable situation in which the fluids involved have the same viscosity. In this framework, we show that the inclusion of nonlinear effects plays a crucial role in inducing sizable interfacial instabilities, as well as in determining the ultimate shape of the pattern-forming structures. Particularly, we have found that the emergence of either narrow or wide fingers can be regulated by tuning a rigidity fraction parameter. Our weakly nonlinear findings reinforce the importance of the so-called curvature weakening effect, which favors the development of fingers in regions of lower rigidity. © 2013 American Physical Society.

  1. Numerical simulations of a buoyant autocatalytic reaction front in tilted Hele-Shaw cells.

    Science.gov (United States)

    Jarrige, N; Bou Malham, I; Martin, J; Rakotomalala, N; Salin, D; Talon, L

    2010-06-01

    We present a numerical analysis of solutal buoyancy effects on the shape and the velocity of autocatalytic reaction fronts, propagating in thin tilted rectangular channels. We use two-dimensional (2D) lattice Bathnagar-Gross-Krook (BGK) numerical simulations of gap-averaged equations for the flow and the concentration, namely a Stokes-Darcy equation coupled with an advection-diffusion-reaction equation. We do observe stationary-shaped fronts, spanning the width of the cell and propagating along the cell axis. We show that the model accounts rather well for experiments we performed using an Iodate Arsenous Acid reaction propagating in tilted Hele-Shaw cells, hence validating our 2D modelization of a three-dimensional problem. This modelization is also able to account for results found for another chemical reaction (chlorite tetrathionate) in a horizontal cell. In particular, we show that the shape and the traveling velocity of such fronts are linked with an eikonal equation. Moreover, we show that the front velocity varies nonmonotonically with the tilt of the cell, and nonlinearly with the width of the cell.

  2. Propagation of a finite bubble in a Hele-Shaw channel of variable depth

    Science.gov (United States)

    Juel, Anne; Franco-Gomez, Andres; Thompson, Alice; Hazel, Andrew

    2017-11-01

    We study the propagation of finite bubbles in a Hele-Shaw channel, where a centred rail is introduced to provide a small axially-uniform depth constriction. We demonstrate experimentally that this channel geometry can be used as a passive sorting device. Single air bubbles carried within silicone oil are generally transported on one side of the rail. However, for flow rates marginally larger than a critical value, a narrow band of bubble sizes on the order of the rail width can propagate over the rail, while bubbles of other sizes segregate to the side of the rail. The width of this band of bubble sizes increases with flow rate and the size of the most stable bubble can be tuned by varying the rail width. We present a depth-averaged theory which reveals that the mechanism relies on a non-trivial interaction between capillary and viscous forces that is fully dynamic, rather than being a simple modification of capillary static solutions. In contrast, for larger bubbles and sufficiently large imposed flow rates, we find that initially centred bubbles do not converge onto a steady mode of propagation. Instead they transiently explore weakly unstable steady modes, an evolution which results in their break-up and eventual settling into a steady state of changed topology. The financial support of CONICYT and the Leverhulme Trust are gratefully acknowledged.

  3. Understanding the effect of hammering process on the vibration characteristics of cymbals

    Science.gov (United States)

    Kuratani, F.; Yoshida, T.; Koide, T.; Mizuta, T.; Osamura, K.

    2016-09-01

    Cymbals are thin domed plates used as percussion instruments. When cymbals are struck, they vibrate and radiate sound. Cymbals are made through spin forming, hammering, and lathing. The spin forming creates the basic shape of the cymbal, which determines its basic vibration characteristics. The hammering and lathing produce specific sound adjustments by changing the cymbal's vibration characteristics. In this study, we study how hammering cymbals affects their vibration characteristics. The hammering produces plastic deformation (small, shallow dents) on the cymbal's surface, generating residual stresses throughout it. These residual stresses change the vibration characteristics. We perform finite element analysis of a cymbal to obtain its stress distribution and the resulting change in vibration characteristics. To reproduce the stress distribution, we use thermal stress analysis, and then with this stress distribution we perform vibration analysis. These results show that each of the cymbal's modes has a different sensitivity to the thermal load (i.e., hammering). This difference causes changes in the frequency response and the deflection shape that significantly improves the sound radiation efficiency. In addition, we explain the changes in natural frequencies by the stress and modal strain energy distributions.

  4. IMPACT OF ROCK HARDNESS ON FRAGMENTATION BY HYDRAULIC HAMMER AND CRUSHING IN JAW CRUSHER

    Directory of Open Access Journals (Sweden)

    Trpimir Kujundžić

    2008-12-01

    Full Text Available The physical and mechanical characteristics of intact rocks depend on the way of their formation, sustained deformations and the process of wearing a specific rock has been exposed to. These characteristics have a rather high influence on the technological process of extraction and dressing of mineral raw materials. However, the mechanical characteristics of rocks due to use of explosives for their extraction in the open pit have a more significant impact. The rock blocks extracted by blasting which are larger than the opening of the primary crusher are usually fragmented by hydraulic hammer. The paper presents the results of the testing of impact of rock hardness on fragmentation of rocks by means of hydraulic hammer and during crushing in jaw crusher. The testing was carried out on the rock samples from five quarries. According to the obtained results the hardness has a considerably larger impact on the fragmentation energy by hydraulic hammer than on the crushing energy in jaw crusher.

  5. Conceptual design report, Hazardous Materials Management and Emergency Response (HAMMER) Training Center

    Energy Technology Data Exchange (ETDEWEB)

    Kelly, K.E. [Westinghouse Hanford Co., Richland, WA (United States)

    1994-11-09

    For the next 30 years, the main activities at the US Department of Energy (DOE) Hanford Site will involve the management, handling, and cleanup of toxic substances. If the DOE is to meet its high standards of safety, the thousands of workers involved in these activities will need systematic training appropriate to their tasks and the risks associated with these tasks. Furthermore, emergency response for DOE shipments is the primary responsibility of state, tribal, and local governments. A collaborative training initiative with the DOE will strengthen emergency response at the Hanford Site and within the regional communities. Local and international labor has joined the Hazardous Materials Management and Emergency Response (HAMMER) partnership, and will share in the HAMMER Training Center core programs and facilities using their own specialized trainers and training programs. The HAMMER Training Center will provide a centralized regional site dedicated to the training of hazardous material, emergency response, and fire fighting personnel.

  6. Theoretical and experimental research of hammer forging process of RIM from AZ31 magnesium alloy

    Directory of Open Access Journals (Sweden)

    A. Gontarz

    2014-10-01

    Full Text Available The results of theoretical analysis and experimental tests of hammer forging process of rim part from AZ31 magnesium alloy are presented in this paper. On the basis of numerical simulation results, the analysis of limiting phenomena was made. These phenomena include: possibility of overlapping presence, not filling of die impression, overheating of material and cracks. The results of theoretical analysis provided the support for planning of experimental tests in industrial conditions. Forging tests were conducted in one of Polish forming plants, applying steam-air hammer of blow energy 63 kJ. On the basis of experimental verification, it was stated that it is possible to obtain rim forging from AZ31 alloy of assumed quality in the hammer forging process.

  7. Single Piezo-Actuator Rotary-Hammering Drill

    Science.gov (United States)

    Sherrit, Stewart; Bao, Xiaoqi; Badescu, Mircea; Bar-Cohen, Yoseph

    2011-01-01

    This innovation comprises a compact drill that uses low-axial preload, via vibrations, that fractures the rock under the bit kerf, and rotates the bit to remove the powdered cuttings while augmenting the rock fracture via shear forces. The vibrations fluidize the powered cuttings inside the flutes around the bit, reducing the friction with the auger surface. These combined actions reduce the consumed power and the heating of the drilled medium, helping to preserve the pristine content of the produced samples. The drill consists of an actuator that simultaneously impacts and rotates the bit by applying force and torque via a single piezoelectric stack actuator without the need for a gearbox or lever mechanism. This reduces the development/fabrication cost and complexity. The piezoelectric actuator impacts the surface and generates shear forces, fragmenting the drilled medium directly under the bit kerf by exceeding the tensile and/or shear strength of the struck surface. The percussive impact action of the actuator leads to penetration of the medium by producing a zone of finely crushed rock directly underneath the struck location. This fracturing process is highly enhanced by the shear forces from the rotation and twisting action. To remove the formed cuttings, the bit is constructed with an auger on its internal or external surface. One of the problems with pure hammering is that, as the teeth become embedded in the sample, the drilling efficiency drops unless the teeth are moved away from the specific footprint location. By rotating the teeth, they are moved to areas that were not fragmented, and thus the rock fracturing is enhanced via shear forces. The shear motion creates ripping or chiseling action to produce larger fragments to increase the drilling efficiency, and to reduce the required power. The actuator of the drill consists of a piezoelectric stack that vibrates the horn. The stack is compressed by a bolt between the backing and the horn in order to

  8. Double-Diffusive Finger Convection: Flow Field Evolution in a Hele-Shaw Cell

    Energy Technology Data Exchange (ETDEWEB)

    COOPER,CLAY A.; GLASS JR.,ROBERT J.; TYLER,SCOTT W.

    2000-12-21

    Double-diffusive finger convection is a hydrodynamic instability that can occur when two components with different diffusivities are oppositely stratified with respect to the fluid density gradient as a critical condition is exceeded. Laboratory experiments were designed using sodium chloride and sucrose solutions in a Hele-Shaw cell. A high resolution, full field, light transmission technique was used to study the development of the instability. The initial buoyancy ratio (R{sub p}), which is a ratio of fluid density contributions by the two solutes, was varied systematically in the experiments so that the range of parameter space spanned conditions that were nearly stable (R{sub p} = 2.8) to those that were moderately unstable (R{sub p} = 1.4). In systems of low R{sub p}, fingers develop within several minutes, merge with adjacent fingers, form conduits, and stall before newer-generated fingers travel through the conduits and continue the process. Solute fluxes in low R{sub p} systems quickly reach steady state and are on the order of 10{sup {minus}6} m{sup 2} sec{sup {minus}1}. In the higher R{sub p} experiments, fingers are slower to evolve and do not interact as dynamically as in the lower R{sub p} systems. Our experiment with initial R{sub p} = 2.8 exhibited flux on the order of that expected for a similar diffusive system (i.e., 10{sup {minus}7} m{sup 2} sec{sup {minus}1}), although the structures were very different than the pattern of transport expected in a diffusing system. Mass flux decayed as t{sup 1/2} in two experiments each with initial R{sub p} = 2.4 and 2.8.

  9. "Uni katab meid ühele palju kahele vähe..." : [luuletused] / Jaan Kaplinski

    Index Scriptorium Estoniae

    Kaplinski, Jaan, 1941-

    2001-01-01

    Tekst eesti ja inglise k. J. Kaplinski lühibiograafia eesti ja inglise k. lk. 93. Sisu: "Uni katab meid ühele palju kahele vähe..." = "Sleep covers us too much for one, too little for two..." ; "Olematus ulatub kõikjale ja olemasolu on täis rahu..." = "Non-being pervades everything and being is full of peace..." ; "See mis meid äratas..." = "What woke us..." ; "Seesama meri meis kõigis..." = "The same sea in us all..." ; Dana paramita ; "Ida ja Lääne vaheline piir rändab ikka, vahel itta, vahel läände..." = "The East-West border is always wandering..." ; "Pesu ei saa kunagi pestud..." = "The washing never gets home..." ; "Neli ja pool tonni sileesia sütt..." = "Four-and-a-half tons of Silesian coal..." ; "Ei teagi, kas ma tohin rääkida roheline..." = "I don't even know if I have the right to say "green"..." ; "Maailmu on nii palju kui liivateri mere ääres..." = "There are as many worlds as grains of sand on a beach..." ; "Viimane pilv läheb üle taeva läänest itta..." = "A last cloud goes over the sky from West to East..." ; "Taevas on pilves. Soe tuul tuleb hõlma alla..." = "The sky is overcast. The warm wind is creeping under your shirt..." ; "Mu tädi tundis neid hästi, mina ei tea..." = "My aunt knew them well, I know of them..." ; "Hommikul tutvustati mind president Mitterrandile..." = "In the morning, I was presented to President Mitterrand..." ; "Meri ei taha lainetada. Tuul ei taha puhuda..." = "The sea doesn't want to wave...".Poems written in English: "Om svabhavasuddhah sarva dharmah. No selfhood..." ; "My little boy..." ; "After many bitterly cold days..." ; "You can forget nature..." ; I walk facing East..." ; "A skier going south..."

  10. Percussive Augmenter of Rotary Drills for Operating as a Rotary-Hammer Drill

    Science.gov (United States)

    Aldrich, Jack Barron (Inventor); Bar-Cohen, Yoseph (Inventor); Sherrit, Stewart (Inventor); Badescu, Mircea (Inventor); Bao, Xiaoqi (Inventor); Scott, James Samson (Inventor)

    2014-01-01

    A percussive augmenter bit includes a connection shaft for mounting the bit onto a rotary drill. In a first modality, an actuator percussively drives the bit, and an electric slip-ring provides power to the actuator while being rotated by the drill. Hammering action from the actuator and rotation from the drill are applied directly to material being drilled. In a second modality, a percussive augmenter includes an actuator that operates as a hammering mechanism that drives a free mass into the bit creating stress pulses that fracture material that is in contact with the bit.

  11. A Water Hammer Protection Method for Mine Drainage System Based on Velocity Adjustment of Hydraulic Control Valve

    Directory of Open Access Journals (Sweden)

    Yanfei Kou

    2016-01-01

    Full Text Available Water hammer analysis is a fundamental work of pipeline systems design process for water distribution networks. The main characteristics for mine drainage system are the limited space and high cost of equipment and pipeline changing. In order to solve the protection problem of valve-closing water hammer for mine drainage system, a water hammer protection method for mine drainage system based on velocity adjustment of HCV (Hydraulic Control Valve is proposed in this paper. The mathematic model of water hammer fluctuations is established based on the characteristic line method. Then, boundary conditions of water hammer controlling for mine drainage system are determined and its simplex model is established. The optimization adjustment strategy is solved from the mathematic model of multistage valve-closing. Taking a mine drainage system as an example, compared results between simulations and experiments show that the proposed method and the optimized valve-closing strategy are effective.

  12. Fingering patterns in Hele-Shaw flows are density shock wave solutions of dispersionless KdV hierarchy

    Energy Technology Data Exchange (ETDEWEB)

    Teodorescu, Razvan [Los Alamos National Laboratory; Lee, S - Y [MONTREAL, CANADA; Wiegmann, P [UNIV OF CHICAGO

    2008-01-01

    We investigate the hydrodynamics of a Hele-Shaw flow as the free boundary evolves from smooth initial conditions into a generic cusp singularity (of local geometry type x{sup 3} {approx} y{sup 2}), and then into a density shock wave. This novel solution preserves the integrability of the dynamics and, unlike all the weak solutions proposed previously, is not underdetermined. The evolution of the shock is such that the net vorticity remains zero, as before the critical time, and the shock can be interpreted as a singular line distribution of fluid deficit.

  13. An unusual case of strangulation of penis by metal hammer head- (a case report

    Directory of Open Access Journals (Sweden)

    Punekar Sulabha

    1978-01-01

    Full Text Available An unusual case of metal hammer-head causing strangulation of penis and retention of urine is reported. The clinical presenta-tion, detailed history and subsequent treatment is discussed. It also includes a review of the literature regarding such cases of strangulation of penis.

  14. Modeling water hammers via PDEs and switched DAEs with numerical justification

    NARCIS (Netherlands)

    Kall, Jochen; Kausar, Rukhsana; Trenn, Stephan

    2017-01-01

    In water distribution networks instantaneous changes in valve and pump settings may introduces jumps and peaks in the pressure. In particular, a well known phenomenon in response to the sudden closing of a valve is the so called water hammer, which (if not taken into account properly may destroy

  15. Learning to Control Orientation and Force in a Hammering Task The Initial Stage

    NARCIS (Netherlands)

    Vernooij, Carlijn A.; Mouton, Leonora J.; Bongers, Raoul M.

    2012-01-01

    The ability to create stone tools is considered an important step in the emergence of human cognition. To further our understanding of these evolutionary processes we focused on the initial learning processes with which this percussive skill may be acquired. We studied a hammering task in which

  16. Waves on a Hele-Shaw Cell: Simulations of Acoustic Emissions During Aerofracture

    Science.gov (United States)

    Turkaya, Semih; Toussaint, Renaud; Kvalheim Eriksen, Fredrik; Daniel, Guillaume; Grude Flekkøy, Eirik; Jørgen Måløy, Knut

    2016-04-01

    In this work, we develop a numerical model to explain the lab scale experimental setup [1] modeling the aerofractures in a porous medium. The mentioned experimental setup consists in a rectangular Hele-Shaw cell with three closed boundaries and one semi-permeable boundary which enables the flow of the fluid but not the solid particles. During the experiments, the fluid (pressurized air) is injected into the system with a constant injection pressure from the point opposite to the semi-permeable boundary. At the large enough injection pressures, the fluid also displaces grains (80 μm grain size) and creates channels and fractures towards the semi-permeable boundary. This analogue model is developed in a linear geometry, with confinement and at a lower porosity to study the instabilities developing during the fast motion of a fluid in dense porous materials: fracturing, fingering, and channeling. Different sources of the signal (air vibration in the carved area, changes in the effective stress due to fluid-solid interactions [2]) are separately analyzed and are investigated further using a far field approximation of Lamb waves presented by Goyder & White [3]. In the analysis phase, power spectrum of different timewindows (5 ms) obtained from the recorded signal are computed. Then, the evolution of this power spectrum is compared with the experimental findings. In the power spectrum, it is possible to see some characteristic structure like peaks in specific frequency ranges. These "peaks" are strongly influenced by the size and branching of the channels, compaction of the medium, vibration of air in the pores and the fundamental frequency of the plate. We found that, in the synthetic dataset, the peaks in the low frequency range (f 10.3389/fphy.2015.00070 2. Niebling MJ, Toussaint R, Flekkøy EG, Maløy KJ. "Dynamic aerofracture of dense granular packings." Phys Rev E, 86 (2012): 061315. 3. Goyder, H. G. D. and White, R. G. "Vibrational power flow from machines into

  17. Structure and Conceptual Design of a Water-Hammering-Type Honsang for Restoration

    Directory of Open Access Journals (Sweden)

    Yong Sam Lee

    2012-06-01

    Full Text Available We analyzed the manufacturing procedure, specifications, repair history, and details of celestial movements of the water-hammering type Honsang (celestial globe. Results from our study on the remaining Honsangs in China and Japan and on the reconstruction models in Korea were applied to our conceptual design of the water-hammering type Honsang. A Honui (armillary sphere and Honsang using the water-hammering method were manufactured in Joseon in 1435 (the 17th year of King Sejong. Jang Yeong-Sil developed the Honsang system based on the water-operation method of Shui yün i hsiang t’ai in China. Water-operation means driving water wheels using a water flow. The most important factor in this type of operation is the precision of the water clock and the control of the water wheel movement. The water-hammering type Honsang in Joseon probably adopted the Cheonhyeong (天衡; oriental escapement device system of Shui yün i hsiang t’ai in China and the overflow mechanism of Jagyeongnu (striking clepsydra in Joseon, etc. In addition to the Cheonryun system, more gear instruments were needed to stage the rotation of the Honsang globe and the sun’s movement. In this study, the water-hammering mechanism is analyzed in the structure of a water clock, a water wheel, the Cheonhyeong system, and the Giryun system, as an organically working operation mechanism. We expect that this study will serve as an essential basis for studies on Heumgyeonggaknu, the water-operating astronomical clock, and other astronomical clocks in the middle and latter parts of the Joseon dynasty.

  18. Auto-Gopher-II: an autonomous wireline rotary-hammer ultrasonic drill

    Science.gov (United States)

    Badescu, Mircea; Lee, Hyeong Jae; Sherrit, Stewart; Bao, Xiaoqi; Bar-Cohen, Yoseph; Jackson, Shannon; Chesin, Jacob; Zacny, Kris; Paulsen, Gale L.; Mellerowicz, Bolek; Kim, Daniel

    2017-04-01

    Developing technologies that would enable future NASA exploration missions to penetrate deeper into the subsurface of planetary bodies for sample collection is of great importance. Performing these tasks while using minimal mass/volume systems and with low energy consumption is another set of requirements imposed on such technologies. A deep drill, called Auto-Gopher II, is currently being developed as a joint effort between JPL's NDEAA laboratory and Honeybee Robotics Corp. The Auto-Gopher II is a wireline rotary-hammer drill that combines formation breaking by hammering using an ultrasonic actuator and cuttings removal by rotating a fluted auger bit. The hammering mechanism is based on the Ultrasonic/Sonic Drill/Corer (USDC) mechanism that has been developed as an adaptable tool for many drilling and coring applications. The USDC uses an intermediate free-flying mass to transform high frequency vibrations of a piezoelectric transducer horn tip into sonic hammering of the drill bit. The USDC concept was used in a previous task to develop an Ultrasonic/Sonic Ice Gopher and then integrated into a rotary hammer device to develop the Auto-Gopher-I. The lessons learned from these developments are being integrated into the development of the Auto- Gopher-II, an autonomous deep wireline drill with integrated cuttings and sample management and drive electronics. Subsystems of the wireline drill are being developed in parallel at JPL and Honeybee Robotics Ltd. This paper presents the development efforts of the piezoelectric actuator, cuttings removal and retention flutes and drive electronics.

  19. THE LEVEL AND AGE DYNAMICS OF SPORTS ACHIEVEMENTS OF ATHLETES-VETERANS OF THE HAMMER THROW

    Directory of Open Access Journals (Sweden)

    Ivanova Natalya Dmitrievna

    2013-03-01

    Full Text Available The article presents the records of the world and Russian athletes veterans in the hammer throw, starting with the age group 35-39 years and up to age group 100-104 years, and a comparison of the records of veterans subject to an age factor and of the high scores of athletes in the current sports. The aim of the work is to analyze the level and dynamics of the records of the world and Russian athletes, veterans in the hammer throw in each five-year group starting with the age group 35-39 years and up to age group 100-104 years. The novelty of the work consists in comparison of the records of the world and Russia in the hammer throw active athletes and records of veterans with the amendment to the age factor. Analysis of the level and age dynamics of sports achievements of domestic and foreign athletes-throwers older age groups. In the course of the research it is established, that in the throwing hammer, decreasing absolute (without regard to the age factor results, which is largely due to the natural age-related changes in the organism of athletes. Records of the world athletes-veterans compared with the records of active athletes and the transition from each of the five-year group in the following, decline on average in men by 10,0%, among women by 19,3%, in spite of the fact that the weight of the shells in the hammer throw with age decreases. Presented the reasons for the backwardness of Russian athletes older than 35 years of foreign veterans.

  20. Diffusion of dissolved CO2 in water propagating from a cylindrical bubble in a horizontal Hele-Shaw cell

    Science.gov (United States)

    Peñas-López, Pablo; van Elburg, Benjamin; Parrales, Miguel A.; Rodríguez-Rodríguez, Javier

    2017-06-01

    The dissolution of a gas bubble in a confined geometry is a problem of interest in technological applications such as microfluidics or carbon sequestration, as well as in many natural flows of interest in geophysics. While the dissolution of spherical or sessile bubbles has received considerable attention in the literature, the case of a two-dimensional bubble in a Hele-Shaw cell, which constitutes perhaps the simplest possible confined configuration, has been comparatively less studied. Here, we use planar laser-induced fluorescence to experimentally investigate the diffusion-driven transport of dissolved CO2 that propagates from a cylindrical mm-sized bubble in air-saturated water confined in a horizontal Hele-Shaw cell. We observe that the radial trajectory of an isoconcentration front, rf(t ) , evolves in time as approximately rf-R0∝√{t } , where R0 denotes the initial bubble radius. We then characterize the unsteady CO2 concentration field via two simple analytical models, which are then validated against a numerical simulation. The first model treats the bubble as an instantaneous line source of CO2, whereas the second assumes a constant interfacial concentration. Finally, we provide an analogous Epstein-Plesset equation with the intent of predicting the dissolution rate of a cylindrical bubble.

  1. Design And Preliminary Testing of a Hammer Mill with End-Suction Lift Capability Suitable for Commercial Processing of Grains and Solid Minerals in Nigeria

    OpenAIRE

    Ebunilo P. O.; Obanor A. I.; Ariavie G. O.

    2010-01-01

    A hammer mill with an end-suction lift capability has been designed, fabricated and tested. The tests were carried out by comparing the product of a conventional hammer mill with that of the new hammer mill with end suction lift capability. The preliminary test results obtained using grains show that the efficiency of a conventional hammer mill and its ability to produce an output of specific size of 400m-600m for both maize and cowpeas is low when compared with the output of the new hammer...

  2. Estimation on separation efficiency of aluminum from base-cap of spent fluorescent lamp in hammer crusher unit.

    Science.gov (United States)

    Rhee, Seung-Whee

    2017-09-01

    In order to separate aluminum from the base-cap of spent fluorescent lamp (SFL), the separation efficiency of hammer crusher unit is estimated by introducing a binary separation theory. The base-cap of SFL is composed by glass fragment, binder, ferrous metal, copper and aluminum. The hammer crusher unit to recover aluminum from the base-cap consists of 3stages of hammer crusher, magnetic separator and vibrating screen. The optimal conditions of rotating speed and operating time in the hammer crusher unit are decided at each stage. At the optimal conditions, the aluminum yield and the separation efficiency of hammer crusher unit are estimated by applying a sequential binary separation theory at each stage. And the separation efficiency between hammer crusher unit and roll crush system is compared to show the performance of aluminum recovery from the base-cap of SFL. Since the separation efficiency can be increased to 99% at stage 3, from the experimental results, it is found that aluminum from the base-cap can be sufficiently recovered by the hammer crusher unit. Copyright © 2017. Published by Elsevier Ltd.

  3. Henry Selby Hele-Shaw LLD, DSc, EngD, FRS, WhSch (1854-1941: Engineer, inventor and educationist

    Directory of Open Access Journals (Sweden)

    Jane Carruthers

    2010-03-01

    Full Text Available H.S. Hele-Shaw (1854–1941 was one of the most outstanding engineering scientists of his generation and an eminent figure in engineering education during the late-19th and early-20th centuries. His work in hydrodynamics (the Hele-Shaw cell and Hele-Shaw pump and his important contribution to the successful development of high-speed aircraft (his variable pitch airscrew, continues to be relevant today. In 1922, as President of the Institution of Mechanical Engineers, he introduced the National Certificate scheme in Britain. It is not well known that Hele-Shaw spent two years in South Africa (1904–1905 attached to the Transvaal Technical Institute, a forerunner of the University of the Witwatersrand. One of only three Fellows of the Royal Society of London in southern Africa in 1905, he was a founder Council member of the Royal Society of South Africa and one of the hosts of the 1905 visit to southern Africa by the British Association for the Advancement of Science. The purpose of this paper is to highlight the time he spent in South Africa and to contextualise it within the larger perspective of his engineering career.

  4. Analysis of Water Hammer with Different Closing Valve Laws on Transient Flow of Hydrogen-Natural Gas Mixture

    National Research Council Canada - National Science Library

    Subani, Norazlina; Amin, Norsarahaida

    2015-01-01

      Water hammer on transient flow of hydrogen-natural gas mixture in a horizontal pipeline is analysed to determine the relationship between pressure waves and different modes of closing and opening of valves...

  5. Analytical study on water hammer pressure in pressurized conduits with a throttled surge chamber for slow closure

    Directory of Open Access Journals (Sweden)

    Yong-liang Zhang

    2010-06-01

    Full Text Available This paper presents an analytical investigation of water hammer in a hydraulic pressurized pipe system with a throttled surge chamber located at the junction between a tunnel and a penstock, and a valve positioned at the downstream end of the penstock. Analytical formulas of maximum water hammer pressures at the downstream end of the tunnel and the valve were derived for a system subjected to linear and slow valve closure. The analytical results were then compared with numerical ones obtained using the method of characteristics. There is agreement between them. The formulas can be applied to estimating water hammer pressure at the valve and transmission of water hammer pressure through the surge chamber at the junction for a hydraulic pipe system with a surge chamber.

  6. Assessment of Impulse Noise Hazard and the Use of Hearing Protection Devices in Workplaces Where Forging Hammers are Used

    National Research Council Canada - National Science Library

    Rafał Młyński; Emil Kozłowski; Jan Adamczyk

    2015-01-01

    .... This kind of noise is also present in many workplaces in the industry. The paper presents the results of noise parameters measurements in workplaces where four different die forging hammers were used...

  7. Perbandingan Produktivitas Luffing Crane Dengan Hammer Head Crane Pada Proyek High Rise Building Studi Kasus: Menara Astra Project, Jakarta

    OpenAIRE

    Citra, Putri Lokita Purnama; Sihkawekas, Gloria; Hidayat, Arif; Yuniarto, Rudi

    2016-01-01

    The economic growth has contributed to the increasing number of high rise building construction mostly in big city especially Jakarta. In practice, the construction of high rise building project is aided by heavy equipment that is hammer head crane which is known as one of tower crane type. However, with the increasing number of high rise building construction, the hammer head crane space that usually be used in high rise building project is limited, hence, another type of tower crane called ...

  8. A Hybrid Resynthesis Model for Hammer-String Interaction of Piano Tones

    Directory of Open Access Journals (Sweden)

    Jensen Kristoffer

    2004-01-01

    Full Text Available This paper presents a source/resonator model of hammer-string interaction that produces realistic piano sound. The source is generated using a subtractive signal model. Digital waveguides are used to simulate the propagation of waves in the resonator. This hybrid model allows resynthesis of the vibration measured on an experimental setup. In particular, the nonlinear behavior of the hammer-string interaction is taken into account in the source model and is well reproduced. The behavior of the model parameters (the resonant part and the excitation part is studied with respect to the velocities and the notes played. This model exhibits physically and perceptually related parameters, allowing easy control of the sound produced. This research is an essential step in the design of a complete piano model.

  9. Hammer forging process of lever drop forging from AZ31 magnesium alloy

    Directory of Open Access Journals (Sweden)

    A. Gontarz

    2013-07-01

    Full Text Available The results of theoretical and experimental analysis of hammer forging process of lever drop forging from AZ31 magnesium alloy are presented in this paper. In order to design a process guaranteeing obtaining a proper product, numerous simulations were made, in which material flow kinematics, strain and damage criterion distributions and forging energy were analyzed. On the basis of the obtained results, the analysis of limiting phenomena, which could appear during the process, was made. Experimental tests in industrial conditions according to designed technology were carried out. Good quality of drop forgings were obtained. On the basis of conducted research, it was stated that hammer forging of lever drop forging from AZ31 magnesium alloy is possible.

  10. Hypothenar hammer syndrome in a computer programmer: CTA diagnosis and surgical and endovascular treatment.

    Science.gov (United States)

    Abdel-Gawad, Ehab A; Bonatti, Hugo; Housseini, Ahmed M; Maged, Ismaeel M; Morgan, Raymond F; Hagspiel, Klaus D

    2009-01-01

    Finger ischemia due to embolic occlusion of digital arteries resulting from trauma to the palmar ulnar artery has been termed hypothenar hammer syndrome (HHS). In HHS, arterial thrombosis and/or aneurysm formation with embolization to the digital arteries causes symptoms of ischemia. We describe a patient in whom the initial diagnosis was made on multidetector computed tomographic angiography (CTA), as well as his endovascular and surgical management.

  11. Single Piezo-Actuator Rotary-Hammering (SPaRH) Drill

    Science.gov (United States)

    Sherrit, Stewart; Domm, Lukas; Bao, Xiaoqi; Bar-Cohen, Yoseph; Chang, Zensheu; Badescu, Mircea

    2012-01-01

    The search for present or past life in the Universe is one of the most important objectives of NASA's exploration missions. Drills for subsurface sampling of rocks, ice and permafrost are an essential tool for astrobiology studies on other planets. Increasingly, it is recognized that drilling via a combination of rotation and hammering offers an efficient and effective rapid penetration mechanism. The rotation provides an intrinsic method for removal of cuttings from the borehole while the impact and shear forces aids in the fracturing of the penetrated medium. Conventional drills that use a single actuator are based on a complex mechanism with many parts and their use in future mission involves greater risk of failure and/or may require lubrication that can introduce contamination. In this paper, a compact drill is reported that uses a single piezoelectric actuator to produce hammering and rotation of the bit. A horn with asymmetric grooves was design to impart a longitudinal (hammering) and transverse force (rotation) to a keyed free mass. The drill requires low axial pre-load since the hammering-impacts fracture the rock under the bit kerf and rotate the bit to remove the powdered cuttings while augmenting the rock fracture via shear forces. The vibrations 'fluidize' the powdered cuttings inside the flutes reducing the friction with the auger surface. This action reduces the consumed power and heating of the drilled medium helping to preserve the pristine content of the acquired samples. The drill consists of an actuator that simultaneously impacts and rotates the bit by applying force and torque via a single piezoelectric stack actuator without the need for a gearbox or lever mechanism. This can reduce the development/fabrication cost and complexity. In this paper, the drill mechanism will be described and the test results will be reported and discussed.

  12. Auto-Gopher: a wire-line rotary-hammer ultrasonic drill

    Science.gov (United States)

    Badescu, Mircea; Sherrit, Stewart; Bao, Xiaoqi; Bar-Cohen, Yoseph; Chen, Beck

    2011-04-01

    Developing technologies that would enable NASA to sample rock, soil, and ice by coring, drilling or abrading at a significant depth is of great importance for a large number of in-situ exploration missions as well as for earth applications. Proven techniques to sample Mars subsurface will be critical for future NASA astrobiology missions that will search for records of past and present life on the planet, as well as the search of water and other resources. A deep corer, called Auto-Gopher, is currently being developed as a joint effort of the JPL's NDEAA laboratory and Honeybee Robotics Corp. The Auto-Gopher is a wire-line rotary- hammer drill that combines rock breaking by hammering using an ultrasonic actuator and cuttings removal by rotating a fluted bit. The hammering mechanism is based on the Ultrasonic/Sonic Drill/Corer (USDC) that has been developed as an adaptable tool for many of drilling and coring applications. The USDC uses an intermediate free-flying mass to transform the high frequency vibrations of the horn tip into a sonic hammering of a drill bit. The USDC concept was used in a previous task to develop an Ultrasonic/Sonic Ice Gopher. The lessons learned from testing the ice gopher were implemented into the design of the Auto-Gopher by inducing a rotary motion onto the fluted coring bit. A wire-line version of such a system would allow penetration of significant depth without a large increase in mass. A laboratory version of the corer was developed in the NDEAA lab to determine the design and drive parameters of the integrated system. The design configuration lab version of the design and fabrication and preliminary testing results are presented in this paper.

  13. A new method to fabricate Fe-TiC composite using conventional sintering and steam hammer

    OpenAIRE

    LAHOUEL, Ali; BOUDEBANE, Saïd; IOST, Alain; MONTAGNE, Alex

    2017-01-01

    International audience; The aim of this research paper is to fabricate a Fe-TiC composite by a novel and simple manufacturing method. The latter is based on two cumulative processes; a conventional sintering (transient liquid phase sintering) and a hot forging with steam hammer respectively. The blinder phase of the studied simples is varied from carbon steel to high alloy steel using alloying additive powders. The obtained outcomes showed that after the sintering process, the relative densit...

  14. Auto-Gopher: A Wire-Line Rotary-Hammer Ultrasonic Drill

    Science.gov (United States)

    Badescu, Mircea; Sherrit, Stewart; Bao, Xiaogi; Bar-Cohen, Yoseph; Chen, Beck

    2011-01-01

    Developing technologies that would enable NASA to sample rock, soil, and ice by coring, drilling or abrading at a significant depth is of great importance for a large number of in-situ exploration missions as well as for earth applications. Proven techniques to sample Mars subsurface will be critical for future NASA astrobiology missions that will search for records of past and present life on the planet, as well as, the search for water and other resources. A deep corer, called Auto-Gopher, is currently being developed as a joint effort of the JPL's NDEAA laboratory and Honeybee Robotics Corp. The Auto-Gopher is a wire-line rotary-hammer drill that combines rock breaking by hammering using an ultrasonic actuator and cuttings removal by rotating a fluted bit. The hammering mechanism is based on the Ultrasonic/Sonic Drill/Corer (USDC) that has been developed as an adaptable tool for many of drilling and coring applications. The USDC uses an intermediate free-flying mass to transform the high frequency vibrations of the horn tip into a sonic hammering of a drill bit. The USDC concept was used in a previous task to develop an Ultrasonic/Sonic Ice Gopher. The lessons learned from testing the ice gopher were implemented into the design of the Auto-Gopher by inducing a rotary motion onto the fluted coring bit. A wire-line version of such a system would allow penetration of significant depth without a large increase in mass. A laboratory version of the corer was developed in the NDEAA lab to determine the design and drive parameters of the integrated system. The design configuration lab version of the design and fabrication and preliminary testing results are presented in this paper

  15. Theoretical and experimental research of hammer forging process of RIM from AZ31 magnesium alloy

    OpenAIRE

    Gontarz, A.

    2014-01-01

    The results of theoretical analysis and experimental tests of hammer forging process of rim part from AZ31 magnesium alloy are presented in this paper. On the basis of numerical simulation results, the analysis of limiting phenomena was made. These phenomena include: possibility of overlapping presence, not filling of die impression, overheating of material and cracks. The results of theoretical analysis provided the support for planning of experimental tests in industrial conditions. Forging...

  16. Hammer forging process of lever drop forging from AZ31 magnesium alloy

    OpenAIRE

    Gontarz, A.; Z. Pater; K. Drozdowski

    2013-01-01

    The results of theoretical and experimental analysis of hammer forging process of lever drop forging from AZ31 magnesium alloy are presented in this paper. In order to design a process guaranteeing obtaining a proper product, numerous simulations were made, in which material flow kinematics, strain and damage criterion distributions and forging energy were analyzed. On the basis of the obtained results, the analysis of limiting phenomena, which could appear during the process, was made. Exper...

  17. Diagnosis of the hypothenar hammer syndrome by high-resolution contrast-enhanced MR angiography

    Energy Technology Data Exchange (ETDEWEB)

    Winterer, J.T.; Ghanem, N.; Schaefer, O.; Lehnhardt, S.; Thuerl, C.; Laubenberger, J. [Department of Diagnostic Radiology, University of Freiburg, Hugstetter Strasse 55, 79106 Freiburg (Germany); Roth, M. [Center of Geriatric Medicine and Gerontology Freiburg, University of Freiburg, Hugstetter Strasse 55, 79106 Freiburg (Germany); Horch, R.E. [Department of Plastic and Hand Surgery, University of Freiburg, Hugstetter Strasse 55, 79106 Freiburg (Germany)

    2002-10-01

    Our objective was to describe the imaging features of hypothenar hammer syndrome using minimally invasive contrast-enhanced MR angiography in comparison with oscillography study. In five patients with hypothenar hammer syndrome Gd-BOPTA-enhanced elliptically reordered 3D pulse sequence MR was compared with oscillography findings and clinical symptoms focusing on angiographic appearance of vessel injury, distribution pattern of hand vasculature and joining branches between the radial and ulnar artery supply. All patients showed segmental occlusion at the site of trauma impact with varying involvement of the superficial palmar arch, common volar digital arteries. Embolic disease was present in 50% of patients and could be clearly identified with MRA. Good correspondence was found between angiographic appearance including the presence of collaterals, clinical symptoms and oscillography. Bilateral comparison was helpful in distinguishing between vessel variants and pathology. Bilateral Gd-BOPTA-enhanced MR angiography is a minimally invasive method to depict clearly the localization and extent of vessel injury in hypothenar hammer syndrome providing valuable information about distribution pattern of hand vasculature and presence of collaterals; however, no flow data can be obtained. (orig.)

  18. Fatigue Life Improvement for Cruciform Welded Joint by Mechanical Surface Treatment using Hammer Peening and UNSM

    Science.gov (United States)

    Han, Seung-Ho; Han, Jeong-Woo; Nam, Yong-Yun; Cho, In-Ho

    For the improvement of fatigue strength of welded structures, mechanical post treatments have been applied in various industrial fields and have in most cases been founded to give substantial increases in their fatigue lives. These methods, generally, consist of the modification of weld toe geometry and the introduction of compressive residual stresses. In mechanical surface treatments, e.g. PHP (pneumatic hammer peening) and UNSM (ultrasonic nano-crystal surface modification), the weld profile is modified due to remove or reduce minute crack-like flaws, and compressive residual stresses are also induced. In this study, a pneumatic hammer peening procedure and a UNSM device were introduced, and a quantitative measure of fatigue strength improvement was performed. The fatigue strength at 2 × 106 cycles of hammer-peened and UNSM treated on a non-load carrying cruciform welded joint shows 220 and 260MPa, respectively, which are more than two times higher than that of as-welded specimen. Especially, the surface layer in the vicinity weld toe treated by the UNSM provides nano-crystal structure created by an ultrasonic cold forging and introduces very high welding residual stress in compression.

  19. On the prediction of impact noise, V: The noise from drop hammers

    Science.gov (United States)

    Richards, E. J.; Carr, I.; Westcott, M.

    1983-06-01

    In earlier papers in this series, the concepts of "acceleration" and "ringing" noise have been studied in relation to impact machines, and values of radiation efficiency have been obtained for the various types of structural components. In the work reported in this paper the predicted and measured noise radiation from a drop hammer, both in full-scale and in {1}/{3}- scale model form, were examined. It is found that overall noise levels ( Leq per event) can be predicted from vibration measurements to within ± 1·5 dB, and to within ±2·5 dB in one-third octave bands. In turn this has permitted noise reduction techniques to be examined by studies of local component vibration levels rather than overall noise, a method which provides considerable enlightenment at the design stage. It is shown that on one particular drop hammer, the noise energy is shared surprisingly uniformly over four or five sources, and that when these have been reduced, the overall noise reduction is severely limited by the "acceleration" noise from the "tup" or "hammer" itself. As this is difficult to eliminate without a basic change in forging technology, it follows that "tup" enclosure or modification of the sharpness of the final "hard" impact are the only means available for any serious noise reduction. Also indicated is the reliability of using model techniques, suitably scaled in frequency and impulse magnitude, in developing machinery with impact characteristics.

  20. Uudiseid maailmast / Ivo Heinloo

    Index Scriptorium Estoniae

    Heinloo, Ivo

    2012-01-01

    Lühisõnumeid muusikamaailmast: Pat Metheny Group tuleb taas kokku. Musta muusika auhinnad Suurbritannias. Bob Marley muusika kui õppevahend inglise keele omandamiseks. Ted Curson 1935-2012. In memoriam David S. Ware. In memoriam Terry Callier

  1. Uudiseid maailmast / Ivo Heinloo

    Index Scriptorium Estoniae

    Heinloo, Ivo

    2013-01-01

    Lühisõnumeid muusikamaailmast: Suri Dave Brubeck. CNN valis Euroopa parimad jazziklubid. Lahkus Ravi Shankar. Jagati latiinomuusika Grammysid. Suri jazzpianist Austin Peralta. Molde jazzifestivali korraldaja pani ameti aha. Suri John Tchicai

  2. Uudiseid maailmast / Ivo Heinloo

    Index Scriptorium Estoniae

    Heinloo, Ivo

    2012-01-01

    Lühisõnumid: Taas jagati Grammysid. Lahkus Whitney Houston. Suri Etta James. Esperanza Spalding jätkab tähelendu. Album Esbjörn Svenssoni mälestuseks. Madonna maailmatuur hõlmab nelja kontinenti

  3. Uudiseid maailmast / Ivo Heinloo

    Index Scriptorium Estoniae

    Heinloo, Ivo

    2012-01-01

    Lühisõnumid: Jazzisuvi Euroopas. Esimene rahvusvaheline jazzipäev. Jazzmuusikud võitlevad oma õiguste eest. Toots Thielemans 90. Uus free jazz'ile keskenduv plaadifirma Suurbritannias. Red Hot Chili Peppers sai Rock and Roll Hall of Fame'i liikmeks. Mulatu Astatkest sai Berklee audoktor. Kanada muusikatööstus jagas auhindu

  4. Bagatellid : maailm / Ivo Heinloo

    Index Scriptorium Estoniae

    Heinloo, Ivo

    2011-01-01

    Muusikasõnumeid mujalt maailmast: Romantilist muusikat Silvio Berlusconilt. WOMEXi maailmamuusika auhind Hugh Masekelale. keith Jarreti Brasiilia kontsert vormus plaadiks. Jagati filmimuusika aihindu. David Lynch debüteerib muusikuna. Lahkus Pete Rugolo. Norra kõigi aegade parim plaat valitud

  5. Neutron Flux Depression in the UO{sub 2}-PuO{sub 2}(15 to 30%) Fuel Rods from IVO-FR2-Vg7-Irradiation Experiment; Depresion de flujo neutronico en las barras combustibles de UO2-PuO2(15 al 30%) del experimento de irradiacion IVO-FR2-Vg7

    Energy Technology Data Exchange (ETDEWEB)

    Lopez, J.; Fernandez, J. L.

    1983-07-01

    The thermal-neutron flux depression within a fuel rod has a great influence in the radial temperature profile of the rod, especially for high enrichment fuel. For this reason, a study was made about the UO{sub 2}-PUO{sub 2} (15 to 30% PUO{sub 2}) fuel pins for the KfK-JEN joint irradiation program IVO, in the FR2 reactor. Different methods (diffusion, Bonalumi, successive generations) were compared and a new approach (parabolic approximation) was developed. (Author) 22 refs.

  6. The influence of the non-Newtonian properties of blood on blood-hammer through the posterior cerebral artery.

    Science.gov (United States)

    Tazraei, Pedram; Riasi, Alireza; Takabi, Behrouz

    2015-06-01

    This work investigates a two dimensional numerical analysis of blood hammer through the posterior cerebral artery. The non-Newtonian and usual Newtonian blood models are compared in the case of blood hammer through the posterior cerebral artery to quantify the differences between the models. In this way, a validated CFD simulation is used to study non-Newtonian shear-thinning effects of blood. The governing equations for the modeling of two-dimensional transient flow are solved using a combination of characteristics and central finite difference methods, respectively for the hyperbolic and parabolic parts. Herein, the non-Newtonian viscosity characteristic of blood is incorporated by using the Carreau model. To convert the nonlinear terms available in the characteristics equation into the linear ones, the Newton-Kantorovich method is implemented. The verification and validation of the numerical results are carried out in detail. Hemodynamic characteristics of blood hammer through the posterior cerebral artery are derived with both the Newtonian and non-Newtonian models, and the results are meticulously compared and discussed. The results show that when blood hammer occurs, the non-Newtonian properties greatly influence the velocity and shear stress profiles. At the early stages of blood hammer, there is a 64% difference between magnitudes of wall shear stress in these two models, and the magnitude of the wall shear stress for the shear-thinning blood flow is lower than the Newtonian one. Copyright © 2015 Elsevier Inc. All rights reserved.

  7. Fookuses on lugemine : üks küsimus ajakirja "Raamatukogu" toimetuskolleegiumi liikmeile / Anneli Sepp, Hele Ellermaa, Mihkel Volt ... [jt.

    Index Scriptorium Estoniae

    2010-01-01

    Vastavad ERÜ esimees Anneli Sepp, Kõrveküla raamatukogu direktor Hele Ellermaa, Eesti Rahvusraamatukogu teadus- ja arenduskeskuse juhataja Mihkel Volt, Tartu Ülikooli Raamatukogu käsikirjade ja haruldaste raamatute osakonna juhataja Malle Ermel, Tartu Ülikooli Viljandi Kultuuriakadeemia infohariduse osakonna juhataja Ilmar Vaaro, Tallinna Ülikooli Akadeemlise Raamatukogu baltika ja haruldaste raamatute osakonna juhataja Katrin Kaugver, Tallinna Tehnikaülikooli Raamatukogu asedirektor Gerda Koidla ja Tartu Lutsu-nimelise Linnaraamatukogu direktor Asko Tamme

  8. 5,000 years old Egyptian iron beads made from hammered meteoritic iron

    OpenAIRE

    Rehren, T.; Belgya, T.; Jambon, A.; Kali, G.; Kasztovszky, Z.; Kis, Z.; Kovacs, I.; Maroti, B.; Martinon-Torres, M.; Miniaci, G.; Pigott, V. C.; Radivojevic, M.; Rosta, L.; Szentmiklosi, L.; Szokefalvi-Nagy, Z.

    2013-01-01

    The earliest known iron artefacts are nine small beads securely dated to circa 3200 BC, from two burials in Gerzeh, northern Egypt. We show that these beads were made from meteoritic iron, and shaped by careful hammering the metal into thin sheets before rolling them into tubes. The study demonstrates the ability of neutron and X-ray methods to determine the nature of the material even after complete corrosion of the iron metal. The iron beads were strung into a necklace together with other e...

  9. Experimental Study of Air Vessel Behavior for Energy Storage or System Protection in Water Hammer Events

    Directory of Open Access Journals (Sweden)

    Mohsen Besharat

    2017-01-01

    Full Text Available An experimental assessment of an air pocket (AP, confined in a compressed air vessel (CAV, has been investigated under several different water hammer (WH events to better define the use of protection devices or compressed air energy storage (CAES systems. This research focuses on the size of an AP within an air vessel and tries to describe how it affects important parameters of the system, i.e., the pressure in the pipe, stored pressure, flow velocity, displaced volume of water and water level in the CAV. Results present a specific range of air pockets based on a dimensionless parameter extractable for other real systems.

  10. Reliability and validity of measures of hammer toe deformity angle and tibial torsion.

    Science.gov (United States)

    Kwon, O Y; Tuttle, L J; Commean, P K; Mueller, M J

    2009-09-01

    Measures of second-fourth metatarsophalangeal joint (MTPJ) angle (indicator of hammer toe deformity) and clinical measures of tibial torsion have limited evidence for validity and reliability. The purposes of this study are to determine: (1) reliability of using a 3D digitizer (Metrecom) and computed tomography (CT) to measure MTPJ angle for toes 2-4; (2) reliability of goniometer, 3D digitizer, and CT to measure tibial torsion; (3) validity of MTPJ angle measures for toes 2-4 using goniometry and 3D digitizer compared to CT (gold standard) and (4) validity of tibial torsion measures using goniometry and 3D digitizer (Metrecom) compared to CT (gold standard). Twenty-nine subjects participated in this study. 27 feet with hammer toe deformity and 31 feet without hammer toe deformity were tested using standardized gonimetric, 3D digitizer and CT methods. ICCs (3,1), standard error of the measurement (SEM) values, and difference measures were used to characterize intrarater reliability. Pearson correlation coefficients and an analysis of variance were used to determine associations and differences between the measurement techniques. 3D digitizer and CT measures of MTPJ angle had high test-retest reliability (ICC = 0.95-0.96 and 0.98-0.99, respectively; SEM = 2.64-3.35 degrees and 1.42-1.47 degrees, respectively). Goniometry, 3D digitizer, and CT measures of tibial torsion had good test-retest reliability (ICC = 0.75, 0.85, and 0.98, respectively; SEM = 2.15 degrees, 1.74 degrees, and 0.72 degree, respectively). Both goniometric and 3D digitizer measures of MTPJ angle were highly correlated with CT measures of MTPJ angle (r = 0.84-0.90, r = 0.84-0.88, respectively) and tibial torsion (r = 0.72, r = 0.83). Goniometry, 3D digitizer, and CT measures were all different from each other for measures of hammer toe deformity (p Goniometry measures were different from CT measures and 3D digitizer measures of tibial torsion (p reliable. Goniometer and 3D digitizer measures of

  11. Experimental and numerical study of buoyancy-driven single bubble dynamics in a vertical Hele-Shaw cell

    Science.gov (United States)

    Wang, Xue; Klaasen, Bart; Degrève, Jan; Blanpain, Bart; Verhaeghe, Frederik

    2014-12-01

    Buoyancy-driven single bubble behaviour in a vertical Hele-Shaw cell with various gap Reynolds numbers Re(h/d)2 has been studied. Two gap thicknesses, h = 0.5 mm (Re(h/d)2 = 1.0-8.5) and 1 mm (Re(h/d)2 = 6.0-50) were used to represent low and high gap Reynolds number flow. Periodic shape oscillation and path vibration were observed once the gap Reynolds number exceeds the critical value of 8.5. The bubble behaviour was also numerically simulated by taking a two-dimensional volume of fluid method coupled with a continuum surface force model and a wall friction model in the commercial computational fluid dynamics package Fluent. By adjusting the viscous resistance values, the bubble dynamics in the two gap thicknesses can be simulated. For the main flow properties including shape, path, terminal velocity, horizontal vibration, and shape oscillation, good agreement is obtained between experiment and simulation. The estimated terminal velocity is 10%-50% higher than the observed one when the bubble diameter d ≤ 5 mm, h = 0.5 mm and 9% higher when d ≤ 18 mm, h = 1.0 mm. The estimated oscillation frequency is 50% higher than the observed value. Three-dimensional effects and spurious vortices are most likely the reason for this inaccuracy. The simulation confirms that the thin liquid films between gas bubbles and the cell walls have a limited effect on the bubble dynamics.

  12. Experimental study of the flow pattern around a bubble confined in a microfluidic Hele-Shaw cell

    Science.gov (United States)

    Tsoumpas, Yannis; Fajolles, Christophe; Malloggi, Florent

    2017-11-01

    The flow field around a bubble moving with respect to a surrounding liquid in a Hele-Shaw cell can usually be characterized by a recirculating flow, which is typically attributed to a Marangoni effect due to surface tension gradients generated by a non-uniform distribution of surfactants (or temperature) along the liquid-gas interface. In the present study, we try to visualize such a flow employing 3D micro-particle tracking velocimetry. We perform experiments on an immobile flattened air bubble that is surrounded by a flow of aqueous solution of surfactant (SDS), in a microfluidic chamber described in the work of Sungyon Lee et al.. The suspending fluid is seeded with spherical micro-particles, with those captured by the recirculating flow orbiting in a three-dimensional trajectory in the vicinity of the liquid-air interface. We address the effect of velocity of the surrounding fluid, surfactant concentration and bubble radius on the recirculating flow pattern. The case of a liquid-liquid interface, with a hexadecane drop as the dispersed phase, is also discussed. The authors would like to acknowledge the financial support of Enhanced Eurotalents program (an FP7 Marie Skłodowska-Curie COFUND program) & ANR (ANR-13-BS09-0011).

  13. A well-posed numerical method to track isolated conformal map singularities in Hele-Shaw flow

    Science.gov (United States)

    Baker, Gregory; Siegel, Michael; Tanveer, Saleh

    1995-01-01

    We present a new numerical method for calculating an evolving 2D Hele-Shaw interface when surface tension effects are neglected. In the case where the flow is directed from the less viscous fluid into the more viscous fluid, the motion of the interface is ill-posed; small deviations in the initial condition will produce significant changes in the ensuing motion. This situation is disastrous for numerical computation, as small round-off errors can quickly lead to large inaccuracies in the computed solution. Our method of computation is most easily formulated using a conformal map from the fluid domain into a unit disk. The method relies on analytically continuing the initial data and equations of motion into the region exterior to the disk, where the evolution problem becomes well-posed. The equations are then numerically solved in the extended domain. The presence of singularities in the conformal map outside of the disk introduces specific structures along the fluid interface. Our method can explicitly track the location of isolated pole and branch point singularities, allowing us to draw connections between the development of interfacial patterns and the motion of singularities as they approach the unit disk. In particular, we are able to relate physical features such as finger shape, side-branch formation, and competition between fingers to the nature and location of the singularities. The usefulness of this method in studying the formation of topological singularities (self-intersections of the interface) is also pointed out.

  14. Observation of two coupled Faraday waves in a vertically vibrating Hele-Shaw cell with one of them oscillating horizontally

    CERN Document Server

    Li, Xiaochen; Liao, Shijun

    2016-01-01

    A system of two-dimensional, two coupled Faraday interfacial waves is experimentally observed at the two interfaces of the three layers of fluids (air, pure ethanol and silicon oil) in a sealed Hele-Shaw cell with periodic vertical vibration. The upper and lower Faraday waves coexist: the upper vibrates vertically, but the crests of the lower one oscillate horizontally with unchanged wave height and a frequency equal to the half of the forcing one of the vertically vibrating basin, while the troughs of the lower one always stay in the same place (relative to the basin). Besides, they are strongly coupled: the wave height of the lower Faraday wave is either a linear function (in the case of a fixed forcing frequency) or a parabolic function (in the case of a fixed acceleration amplitude) of that of the upper, with the same wave length. In addition, the upper Faraday wave temporarily loses its smoothness at around $t=T/4$ and $t=3T/4$, where $T$ denotes the wave period, and thus has fundamental difference from ...

  15. Wave Stresses in the Anvil Hammer Rods under Impact Including Ram Mass and Deformation Force of Forgings

    Directory of Open Access Journals (Sweden)

    V. M. Sinitskiy

    2016-01-01

    Full Text Available When operating the anvil hammers there occur impacts of die tooling and as a consequence, virtually instantaneous impact stops of motion of drop hammer parts. Such operating conditions come with accelerated failures of the anvil hammer rods because of emerging significant wave stresses. Engineering practice widely uses variation, difference, and integral methods to calculate wave stresses. However, to use them a researcher has to acquire certain skills, and the special programs should be available. The paper considers a method for estimating the wave stress changes in the anvil hammer rods, which is based on the wave equation of the Laplace transform. It presents a procedure for generating differential equations and their solution using the operator method. These equations describe the wave processes of strain and stress propagation in the anvil hammer rod under non-rigid impact with the compliance obstacle of the drop hammer parts. The work defines how the piston and rod mass and also the mechanical and geometric parameters of the rod influence on the stress level in the rod sealing of the hammer ram. Analysis of the results shows that the stresses in the rod sealing are proportional to the total amount of wave stresses caused by the rod and piston impact included in the total weight of the system. The piston influence on the stresses in the rod under impact is in direct proportion to the ratio of its mass to the mass of the rod. Geometric parameters of the rod and speed of drop parts before the impact influence on the stress value as well. It was found that if the time of impact is less than the time of the shock wave running in forward and backward direction, the impact with a compliance obstacle is equivalent to that of with a rigid obstacle, and the dependence of the wave stresses follows the Zhukovsky formula of direct pressure shock. The presented method of stress calculation can be successfully used to select the optimal mass and the rod

  16. Assessment of water hammer effects on boiling water nuclear reactor core dynamics

    Directory of Open Access Journals (Sweden)

    Bousbia-Salah Anis

    2007-01-01

    Full Text Available Complex phenomena, as water hammer transients, occurring in nuclear power plants are still not very well investigated by the current best estimate computational tools. Within this frame work, a rapid positive reactivity addition into the core generated by a water hammer transient is considered. The numerical simulation of such phenomena was carried out using the coupled RELAP5/PARCS code. An over all data comparison shows good agreement between the calculated and measured core pressure wave trends. However, the predicted power response during the excursion phase did not correctly match the experimental tendency. Because of this, sensitivity studies have been carried out in order to identify the most influential parameters that govern the dynamics of the power excursion. After investigating the pressure wave amplitude and the void feed back responses, it was found that the disagreement between the calculated and measured data occurs mainly due to the RELAP5 low void condensation rate which seems to be questionable during rapid transients. .

  17. Perbandingan Nilai Kuat Tekan Beton Menggunakan Hammer Test dan Compression Testing Machine terhadap Beton Pasca Bakar

    Directory of Open Access Journals (Sweden)

    Weka Indra Dharmawan

    2016-10-01

    Full Text Available The change of temperature is quite high, as was the case in the event of a fire, it will have an impact on the concrete structure. Because in the process there will be a cycle of alternately heating and cooling, which would lead to a change in phase of the complex physical and chemical basis. Using hammer test as a comparison of compression testing machine (CTM in normal conditions the concrete now widely used and has had standardization. The objects to test consist of 60 concrete cubes beam of 15 cm x 15 cm x 15 cm which burned for 3 hours with 3 variants of temperatures. The 20 samples used as a blank test and each 20 samples burnt with temperature 300oC and 600oC. The results showed the increase in the compressive strength at the temperature of 300oC in the amount of 6.68% or 10.91 Kg/cm2, and at the temperature of 600oC has decreased by 1.57% or 2.56 Kg/cm2 on hammer test. While the testing with compression strength of concrete decreased at temperatures of 300oC and 600oC respectively is 15.77% or 51.1 Kg/cm2 and 21.89% or 70.93 Kg/cm2.

  18. A Really Good Hammer: Quantification of Mass Transfer Using Perfluorocarbon Tracers (475th Brookhaven Lecture)

    Energy Technology Data Exchange (ETDEWEB)

    Watson, Tom [BNL Environmental Sciences, Tracer Technology Group

    2012-02-15

    Brookhaven Lab’s perfluorocarbon tracer (PFT) technology can be viewed as a hammer looking for nails. But, according to Tom Watson, leader of the Lab’s Tracer Technology Group in the Environmental Research and Technology Division (ERTD), “It’s a really good hammer!” The colorless, odorless and safe gases have a number of research uses, from modeling how airborne contaminants might move through urban canyons to help first responders plan their response to potential terrorist attacks and accidents to locating leaks in underground gas pipes. Their extremely low background level — detectable at one part per quadrillion — allows their transport to be easily tracked. Lab researchers used PFTs during the 2005 Urban Dispersion Program field studies in New York City, gathering data to help improve models of how a gas or chemical release might move around Manhattan’s tall buildings and canyons. Closer to home, scientists also used PFTs to make ventilation measurements in Bldg. 400 on the Lab site to provide data to test air flow models used in determining the effects of passive and active air exchange on the levels of indoor and outdoor air pollution, and to determine the effects of an accidental or intentional release of hazardous substances in or around buildings.

  19. Theoretical study of flashing and water hammer in a supercritical water cycle during pressure drop

    Energy Technology Data Exchange (ETDEWEB)

    Imre, A.R., E-mail: imre@aeki.kfki.h [Simulator Laboratory, MTA KFKI Atomic Energy Research Institute, Budapest, POB 49, H-1525 (Hungary); Barna, I.F.; Ezsoel, G. [Thermohydraulics Laboratory, MTA KFKI Atomic Energy Research Institute, Budapest, POB 49, H-1525 (Hungary); Hazi, G. [Simulator Laboratory, MTA KFKI Atomic Energy Research Institute, Budapest, POB 49, H-1525 (Hungary); Kraska, T. [Institute for Physical Chemistry, University of Cologne, Luxemburger Str. 116, D-50939 Koeln (Germany)

    2010-06-15

    During a loss of coolant accident (LOCA) the pressure of the coolant can drop significantly in the vicinity of the leak. It will be shown that unlike in pressurized water reactors (PWRs) where this pressure drop can cause only sudden vaporization - also called flashing - in supercritical water cooled reactors (SCWRs) it can cause sudden condensation (condensation-induced water hammer), too. The reason is that from supercritical state the system can go to metastable liquid as well as to metastable vapour state after LOCA. Relaxation from metastable fluid states is a fast process, followed by a local positive or negative pressure-jump, which might increase the damage around the leak. Conservative estimation will be given for the magnitude of these pressure jumps caused by the flashing or water hammer by assuming various initial pressure losses. In our calculations, three different equations of state are used: the simple van der Waals EoS; the Redlich-Kwong as an empirical development; and the more sophisticated non-cubic Deiters equation of state. These equations are able to describe metastable states qualitatively but with different accuracy. These calculations can help us to map the local immediate effect of any sudden pressure drop and therefore it can help to design better safety protocols.

  20. Performance Study of a Fluidic Hammer Controlled by an Output-Fed Bistable Fluidic Oscillator

    Directory of Open Access Journals (Sweden)

    Xinxin Zhang

    2016-10-01

    Full Text Available Using a no-moving-component output-fed bistable fluidic oscillator to control fluid flows into a parallel path has been recognized for a considerable time, but as yet it is not so widely adopted as its obvious benefits would deserve. This may be attributed to the encountered problems associated with its jet behavior, complicated by its loading characteristics. In order to investigate a typical case for the application of the output-fed fluidic oscillator, this paper elaborates on the computational fluid dynamics (CFD simulation method for studying the performance of a fluidic hammer controlled by an output-fed bistable fluidic oscillator. Given that couple mechanism exists between the flow field in the fluidic oscillator and the impact body, dynamic mesh technique and a user-defined function written in C programming language were used to update the mesh in the simulations. In terms of the evaluation of performance, the focus is on the single-impact energy and output power of the fluidic hammer in this study, to investigate the effect of different parameters of the impact body on them. Experimental tests based on the noncontact measuring method were conducted to verify the simulation results, by which the accuracy and reliability of this CFD simulation method was proved.

  1. Experience in Grid Site Testing for ATLAS, CMS and LHCb with HammerCloud

    CERN Multimedia

    CERN. Geneva

    2012-01-01

    Frequent validation and stress testing of the network, storage and CPU resources of a grid site is essential to achieve high performance and reliability. HammerCloud was previously introduced with the goals of enabling VO- and site-administrators to run such tests in an automated or on-demand manner. The ATLAS, CMS and LHCb experiments have all developed VO plugins for the service and have successfully integrated it into their grid operations infrastructures. This work will present the experience in running HammerCloud at full scale for more than 3 years and present solutions to the scalability issues faced by the service. First, we will show the particular challenges faced when integrating with CMS and LHCb offline computing, including customized dashboards to show site validation reports for the VOs and a new API to tightly integrate with the LHCbDIRAC Resource Status System. Next, a study of the automatic site exclusion component used by ATLAS will be presented along with results for tuning the exclusion ...

  2. Structure and spin state of nonheme FeIVO complexes depending on temperature: predictive insights from DFT calculations and experiments† †Electronic supplementary information (ESI) available: Methods section, Tables S1–S8, all the data for DFT calculations (Tables S9–S53 for energies, Mulliken spin density distribution, and selected geometries), and coordinates. See DOI: 10.1039/c7sc01738c Click here for additional data file.

    Science.gov (United States)

    Lee, Na Young; Mandal, Debasish; Bae, Seong Hee; Seo, Mi Sook; Lee, Yong-Min; Shaik, Sason

    2017-01-01

    The spin states (S = 1 and S = 2) of nonheme FeIVO intermediates are believed to play an important role in determining their chemical properties in enzymatic and biomimetic reactions. However, it is almost impossible to investigate the spin state effect of nonheme FeIVO species experimentally, since FeIVO models having the S = 1 and S = 2 spin states at the same time neither exist nor can be synthesized. However, recent synthesis of an FeIVO complex with an S = 1 spin state (triplet), [(Me3NTB)FeIVO]2+ (1), and a structurally similar FeIVO complex but with an S = 2 spin state (quintet), [(TQA)FeIVO]2+ (2), has allowed us to compare their reactivities at 233 K. In the present study, we show that structural variants control the spin-state selectivity and reactivity of nonheme FeIVO complexes. While 1 and 2 were proposed to be in an octahedral geometry based on DFT calculations and spectroscopic characterization done at 4 K, further DFT calculations show that these species may well assume a trigonal bipyramidal structure by losing one coordinated solvent ligand at 233 K. Thus, the present study demonstrates that the structure and spin state of nonheme FeIVO complexes can be different at different temperatures; therefore, the structural and/or spin state information obtained at 4 K should be carefully used at a higher temperature (e.g., 233 K). In addition to 1 and 2, [(TPA)FeIVO]2+ (3) with an S = 1 spin state, whose spin state was determined spectroscopically and theoretically at 233 K, is included in this study to compare the chemical properties of S = 1 and S = 2 FeIVO complexes. The present results add another dimension to the discussion of the reactivites of nonheme FeIVO species, in which the structural preference and spin state of nonheme FeIVO species can vary depending on temperature. PMID:28970926

  3. Studi Numerik Variasi Pemilihan Gas Accumulator Untuk Pencegahan Water Hammer Pada Sistem Perpipaan Sepanjang 1 Kilometer dan Debit Aliran 800 GPM

    Directory of Open Access Journals (Sweden)

    Anindika Bagus Pradana

    2013-09-01

    Full Text Available Sistem jaringan perpipaan sangat penting dalam menunjang produksi pada bidang industri. Jaringan perpipaan mengalami beberapa fenomena seperti distribusi fluida dan water hammer. Water hammer sering terjadi di daerah discharge pompa saat pengoperasian dan gagalnya beroperasinya pompa. Water hammer dapat merusak jaringan perpipaan. Fenomena water hammer dapat terjadi hampir di setiap sistem instalasi perpipaan. Fenomena ini mempunyai dampak buruk apabila sistem perpipaan tersebut tidak memperhatikan akibat dari water hammer. Fenomena dalam sistem perpipaan mempunyai dampak negatif dengan selang waktu tertentu, water hammer adalah fenomena dimana dampak yang ditimbulkan terjadi seketika itu juga. Penanggulangan yang tidak tepat terhadap dampak tersebut dapat mengakibatkan instalasi tersebut harus dimatikan (shutdown. Pada simulasi ini digunakan sistem instalasi perpipaan dengan panjang 1 kilometer dan debit aliran 800 gpm.Pada sistem instalasi ini memiliki rangkaian pompa tunggal yang dilengkapi dengan gas accumulator di sisi discharge pompa. Ketika terjadi perubahan flow rate yang menyebabkan pompa beroprasi atau gagal beroprasi akan menimbulkan fenomena water hammer.Penelitian dilakukan secara numerik menggunakan software AFT Impulse 4.0. Water hammer dapat diminimalisi dengan memasang gas accumulator pada daerah dekat discharge pompa. Variasi gas accumulator adalah gas accumulator merk NOK tipe AT 175-20 dengan volume maksimum 20 liter, tipe AT 210-60 dengan volume maksimum 60 liter dan tipe AT 230-120 dengan volume maksimum 100 liter. Hasil yang didapatkan pada simulasi menunjukan pada jarak 4 meter dari rumah pompa masing-masing P max dan P min  untuk sistem perpipaan dengan simulasi proses trip pompa tanpa proteksi water hammer adalah 1729 Kpa dan 381 Kpa, untuk sistem perpipaan dengan gas accumulator volume setting 20 liter adalah 1228 Kpa dan 927 Kpa, untuk sistem perpipaan dengan gas accumulator volume setting 60 liter adalah 1161 Kpa

  4. Mouillage de surfaces hétérogènes : cellule de Hele-Shaw imparfaite

    Science.gov (United States)

    Paterson, Agnès.

    We study the influence of the surface wettability defects on the behavior of a liquid front advancing in a thin Hele-Shaw cell. Defects are made by spraying ink or by deposition of a photosensitive resin on a glass surface, giving a well-characterized system with controlled defects. We have done an experimental and theoretical study of the interface motion past a single defect. The main result is the existence of a pinning transition: the contact line cannot move over defects that are too large and an air bubble remains trapped on the defect. Smaller defects do hold the contact line for a while, but they are eventually wetted by the advancing liquid. We determine the critical defect size for this transition and calculate the equilibrium shapes of the interface in a two-dimensional geometry. We also investigate the motion of an interface moving over multiple defects. We analyze the relation between the statistical properties of the wetting front as function of the geometrical properties of the defect distribution and gravity effects. Nous avons étudié l'influence des défauts de mouillabilité sur la morphologie d'un front de mouillage avançant dans une cellule mince, dite cellule de Hele-Shaw. Nous avons mis au point la réalisation des cellules minces, la fabrication de défauts et leur caractérisation ainsi qu'un dispositif optique nous permettant de visualiser les déformations successives du front de mouillage. Nous avons étudié expérimentalement et théoriquement l'interaction entre l'interface et un défaut de mouillabilité isolé. Nous avons mis en évidence la transition entre un régime de "décrochage" et de "piégeage": si le défaut est suffisamment fort, la ligne de contact reste accrochée sur le défaut et le front liquide ne peut progresser qu'en laissant une bulle d'air sur le défaut, une partie de la surface solide restant alors non mouillée. Sur un défaut faible, en revanche, la ligne de contact ne fait que se déformer momentan

  5. 76 FR 24856 - Heavy Forged Hand Tools (i.e., Axes & Adzes, Bars & Wedges, Hammers & Sledges, and Picks...

    Science.gov (United States)

    2011-05-03

    ... From the Federal Register Online via the Government Publishing Office ] DEPARTMENT OF COMMERCE International Trade Administration Heavy Forged Hand Tools (i.e., Axes & Adzes, Bars & Wedges, Hammers & Sledges..., Department of Commerce. SUMMARY: On January 3, 2011, the Department of Commerce (``Department'') initiated a...

  6. Identification of noise sources of forge hammers during production: An application of residual spectrum techniques to transients

    Science.gov (United States)

    Trethewey, M. W.; Evensen, H. A.

    1981-08-01

    Three gravity-drop, four-piece forge hammers are analyzed to determine the principal structural sources of impulsive noise radiation during production forging. A three-input single-output model is used to describe the hammer system, based on "input" signals taken from one column, the anvil and the ram accelerations, and one "output" signal taken from the sound pressure at the operator's position. The frequency response functions between the elemental vibrations and the sound pressure signal are determined from these signals by residual spectrum techniques. For the three hammers studied, the analysis shows that the ram is a major source of acoustic energy radiated to the oeprator's position, while the columns and anvil radiate between 1 and 4 dB less energy. The three-input model is then used to estimate the effect of acoustic shrouds on the sound energy radiation. The results indicate that it may be necessary to treat all the structural elements before significant reductions can be achieved, due mainly to the high degree of interaction between the components. The residual spectrum derived from this model indicates that the three input model may not be totally adequate for all production hammers; it may be necessary to develop higher-input models, with use of data from more transducers located to sense a higher number of contributing vibration modes. However, in this study the three-input model accounted for 73-82% of the sound energy density at the operator's position.

  7. New developments with Schmidt-hammer exposure-age dating (SHD): Comparison of mechanical and electronic Schmidt-hammers - towards a conversion factor for Q- and R-values

    Science.gov (United States)

    Winkler, Stefan; Matthews, John; Corbett, David

    2014-05-01

    Developed as an instrument for in situ destruction-free testing of concrete hardness in construction works, the Schmidt-hammer has subsequently been introduced and applied in various fields of geomorphology and geology. In the context of investigating Late Glacial and Holocene glacier chronologies, the Schmidt-hammer has been widely used as a relative-age dating technique. Such applications have for example successfully separated moraines formed during different glacier advance periods ('Little Ice Age'-type events). Pilot studies combined Schmidt-hammer measurements with available radiocarbon ages in order to achieve age constraints. Schmidt-hammer exposure-age dating (SHD) combining Schmidt-hammer and terrestrial cosmogenic nuclide dating (TCND) has recently been successfully applied in Norway and New Zealand. Schmidt-hammer tests have also been used to ensure the representativeness of boulders selected for TCND sampling. Especially in mountain regions with a high "geomorphological uncertainty" with the dating of Holocene moraines the inherited multi-proxy approach of SHD owns a considerable potential for reliable investigations of Late Glacial/Holocene glacier chronologies and their palaeoclimatic interpretation. An electronic Schmidt-hammer (named SilverSchmidt) was introduced by the manufacturer of the original mechanical Schmidt-hammer (Proceq SA) a few years ago. It offers especially facilities for much easier data processing and constitutes, therefore, a major improvement and potential replacement for the mechanical Schmidt-hammer. However, its different approach to the measurement of surface hardness - based on Q-(velocity) values instead of R-(rebound) values - means that measurements from the two instruments are not easily interconvertible. Prior to any considerations of using the instruments interchangeably or replacing the mechanical Schmidt-hammer in future studies with the SilverSchmidt, comparative tests under field conditions need to be undertaken

  8. Grinding energy and physical properties of chopped and hammer-milled barley, wheat, oat, and canola straws

    Energy Technology Data Exchange (ETDEWEB)

    J.S. Tumuluru; L.G. Tabil; Y. Song; K.L. Iroba; V. Meda

    2014-01-01

    In the present study, specific energy for grinding and physical properties of wheat, canola, oat and barley straw grinds were investigated. The initial moisture content of the straw was about 0.13–0.15 (fraction total mass basis). Particle size reduction experiments were conducted in two stages: (1) a chopper without a screen, and (2) a hammer mill using three screen sizes (19.05, 25.4, and 31.75 mm). The lowest grinding energy (1.96 and 2.91 kWh t-1) was recorded for canola straw using a chopper and hammer mill with 19.05-mm screen size, whereas the highest (3.15 and 8.05 kWh t-1) was recorded for barley and oat straws. The physical properties (geometric mean particle diameter, bulk, tapped and particle density, and porosity) of the chopped and hammer-milled wheat, barley, canola, and oat straw grinds measured were in the range of 0.98–4.22 mm, 36–80 kg m-3, 49–119 kg m-3, 600–1220 kg m-3, and 0.9–0.96, respectively. The average mean particle diameter was highest for the chopped wheat straw (4.22-mm) and lowest for the canola grind (0.98-mm). The canola grinds produced using the hammer mill (19.05-mm screen size) had the highest bulk and tapped density of about 80 and 119 kg m-3; whereas, the wheat and oat grinds had the lowest of about 58 and 88–90 kg m-3. The results indicate that the bulk and tapped densities are inversely proportional to the particle size of the grinds. The flow properties of the grinds calculated are better for chopped straws compared to hammer milled using smaller screen size (19.05 mm).

  9. HAMMER: automated operation of mass frontier to construct in silico mass spectral fragmentation libraries.

    Science.gov (United States)

    Zhou, Jiarui; Weber, Ralf J M; Allwood, J William; Mistrik, Robert; Zhu, Zexuan; Ji, Zhen; Chen, Siping; Dunn, Warwick B; He, Shan; Viant, Mark R

    2014-02-15

    Experimental MS(n) mass spectral libraries currently do not adequately cover chemical space. This limits the robust annotation of metabolites in metabolomics studies of complex biological samples. In silico fragmentation libraries would improve the identification of compounds from experimental multistage fragmentation data when experimental reference data are unavailable. Here, we present a freely available software package to automatically control Mass Frontier software to construct in silico mass spectral libraries and to perform spectral matching. Based on two case studies, we have demonstrated that high-throughput automation of Mass Frontier allows researchers to generate in silico mass spectral libraries in an automated and high-throughput fashion with little or no human intervention required. Documentation, examples, results and source code are available at http://www.biosciences-labs.bham.ac.uk/viant/hammer/.

  10. Visual analysis and Schmidt rebound hammer test of Taj-ul-Masajid

    Directory of Open Access Journals (Sweden)

    A. Hussain

    2017-09-01

    Full Text Available Taj-ul-Masajid, literally, the crown among mosques is an embodiment of genius structural engineering located in the heart of Madhya Pradesh, Bhopal. A unique combination of the Mughal Architecture in complete stone masonry and modern day RCC work, it is a liaison between the past and the present of structural engineering. A wonder in its own right, the structure is often neglected by technicians and conservationalists alike, a satire on their ingenuity. Now, in a severely dilapidated condition, the structure is in pressing need of structural rehabilitation. The authors intend to perform in-situ Non-Destructive Testing & Evaluation (NDT&E of this structure and thereby suggest steps to better its present condition. As a first step, they’ve performed the visual analysis and Schmidt Rebound Hammer Test on the concrete portion of the structure which has been presented herein. The authors have also suggested a new approach for the verification of results obtained.

  11. Vibration Analysis Based on Hammer Impact for Fouling Detection Using Microphone and Accelerometer as Sensors

    Directory of Open Access Journals (Sweden)

    Jaidilson Silva

    2010-01-01

    Full Text Available The easy detection of fouling in duct systems is a persistent problem and remains a relevant demand for the chemical, oil, food and pharmaceutical industries. The fouling process is the slow, unwanted layer deposition of heavy organic and other dissolved solid materials out of transported fluids or suspensions onto inner wall surfaces in fluid transport systems over an extended period of time. This work presents research results of vibrational hammer excitation for easy to use external non-invasive, non-destructive fouling detection in pipelines and other large scale duct systems. The main goal is the detection of inner pipe layer formation, and thickness estimation of the adsorbed material. Data were taken from the vibration amplitude variation in presence of an inner pipe fouling layer using acoustic accelerometer and microphone detection. The experimental set-up and achievable sensitivities and of the methods are outlined.

  12. Single Piezo-Actuator Rotary-Hammering (SPaRH) Drill

    Science.gov (United States)

    Sherrit, Stewart (Inventor); Bao, Xiaoqi (Inventor); Badescu, Mircea (Inventor); Bar-Cohen, Yoseph (Inventor)

    2014-01-01

    A Single Piezo-Actuator Rotary-Hammering (SPaRH) Drill includes a horn actuator having high power piezoelectric materials and a flexure pre-stress to increase the actuators effectiveness. The drill is a low mass, low power, compact coring drill measuring 20-cm high by 7-cm diameter and having a total weight of 2 kg including drive electronics. Using an average power of 50-Watts, the drill basalt is expected to cut basalt at a rate of 0.2 cm/min down to depth of 10-cm and create cuttings and an intact core. The drill is expected to operate under different environments including Martian ambient (6 Torr and down to -50 degree C), and liquid nitrogen temperatures (77 K) and low pressure (<<1 Torr) to simulate lunar polar and Europa conditions. Materials expected to be sampled include Kaolinite, Saddleback Basalt, Limestone, Volcanic Breccia, Siltstone, ice, permafrost and layered rocks with different hardness.

  13. Improving ATLAS grid site reliability with functional tests using HammerCloud

    CERN Document Server

    Legger, F; The ATLAS collaboration; Medrano Llamas, R; Sciacca, G; Van der Ster, D C

    2012-01-01

    With the exponential growth of LHC (Large Hadron Collider) data in 2011, and more coming in 2012, distributed computing has become the established way to analyse collider data. The ATLAS grid infrastructure includes more than 80 sites worldwide, ranging from large national computing centers to smaller university clusters. These facilities are used for data reconstruction and simulation, which are centrally managed by the ATLAS production system, and for distributed user analysis. To ensure the smooth operation of such a complex system, regular tests of all sites are necessary to validate the site capability of successfully executing user and production jobs. We report on the development, optimization and results of an automated functional testing suite using the HammerCloud framework. Functional tests are short light-weight applications covering typical user analysis and production schemes, which are periodically submitted to all ATLAS grid sites. Results from those tests are collected and used to evaluate si...

  14. Improving ATLAS grid site reliability with functional tests using HammerCloud

    CERN Document Server

    Legger, F; The ATLAS collaboration

    2012-01-01

    With the exponential growth of LHC (Large Hadron Collider) data in 2011, and more coming in 2012, distributed computing has become the established way to analyse collider data. The ATLAS grid infrastructure includes almost 100 sites worldwide, ranging from large national computing centers to smaller university clusters. These facilities are used for data reconstruction and simulation, which are centrally managed by the ATLAS production system, and for distributed user analysis. To ensure the smooth operation of such a complex system, regular tests of all sites are necessary to validate the site capability of successfully executing user and production jobs. We report on the development, optimization and results of an automated functional testing suite using the HammerCloud framework. Functional tests are short light-weight applications covering typical user analysis and production schemes, which are periodically submitted to all ATLAS grid sites. Results from those tests are collected and used to evaluate site...

  15. Reliability of the Achilles tendon tap reflex evoked during stance using a pendulum hammer.

    Science.gov (United States)

    Mildren, Robyn L; Zaback, Martin; Adkin, Allan L; Frank, James S; Bent, Leah R

    2016-01-01

    The tendon tap reflex (T-reflex) is often evoked in relaxed muscles to assess spinal reflex circuitry. Factors contributing to reflex excitability are modulated to accommodate specific postural demands. Thus, there is a need to be able to assess this reflex in a state where spinal reflex circuitry is engaged in maintaining posture. The aim of this study was to determine whether a pendulum hammer could provide controlled stimuli to the Achilles tendon and evoke reliable muscle responses during normal stance. A second aim was to establish appropriate stimulus parameters for experimental use. Fifteen healthy young adults stood on a forceplate while taps were applied to the Achilles tendon under conditions in which postural sway was constrained (by providing centre of pressure feedback) or unconstrained (no feedback) from an invariant release angle (50°). Twelve participants repeated this testing approximately six months later. Within one experimental session, tap force and T-reflex amplitude were found to be reliable regardless of whether postural sway was constrained (tap force ICC=0.982; T-reflex ICC=0.979) or unconstrained (tap force ICC=0.968; T-reflex ICC=0.964). T-reflex amplitude was also reliable between experimental sessions (constrained ICC=0.894; unconstrained ICC=0.890). When a T-reflex recruitment curve was constructed, optimal mid-range responses were observed using a 50° release angle. These results demonstrate that reliable Achilles T-reflexes can be evoked in standing participants without the need to constrain posture. The pendulum hammer provides a simple method to allow researchers and clinicians to gather information about reflex circuitry in a state where it is involved in postural control. Copyright © 2015 Elsevier B.V. All rights reserved.

  16. Experience in Grid Site Testing for ATLAS, CMS and LHCb with HammerCloud

    Science.gov (United States)

    Elmsheuser, Johannes; Medrano Llamas, Ramón; Legger, Federica; Sciabà, Andrea; Sciacca, Gianfranco; Úbeda García, Mario; van der Ster, Daniel

    2012-12-01

    Frequent validation and stress testing of the network, storage and CPU resources of a grid site is essential to achieve high performance and reliability. HammerCloud was previously introduced with the goals of enabling VO- and site-administrators to run such tests in an automated or on-demand manner. The ATLAS, CMS and LHCb experiments have all developed VO plugins for the service and have successfully integrated it into their grid operations infrastructures. This work will present the experience in running HammerCloud at full scale for more than 3 years and present solutions to the scalability issues faced by the service. First, we will show the particular challenges faced when integrating with CMS and LHCb offline computing, including customized dashboards to show site validation reports for the VOs and a new API to tightly integrate with the LHCbDIRAC Resource Status System. Next, a study of the automatic site exclusion component used by ATLAS will be presented along with results for tuning the exclusion policies. A study of the historical test results for ATLAS, CMS and LHCb will be presented, including comparisons between the experiments’ grid availabilities and a search for site-based or temporal failure correlations. Finally, we will look to future plans that will allow users to gain new insights into the test results; these include developments to allow increased testing concurrency, increased scale in the number of metrics recorded per test job (up to hundreds), and increased scale in the historical job information (up to many millions of jobs per VO).

  17. Modeling leakage pathways in subsurface formations. Fluid drainage through multiple fractures in porous media: Insights from Hele Shaw cell experiments

    Science.gov (United States)

    Ray, Sujata

    2017-04-01

    Arresting the recent observed warming of the earth's climate is a challenge requiring the reduction of anthropogenic emissions of carbon dioxide. One option for reducing emissions into the atmosphere is to capture and sequester the released carbon dioxide in geological formations. However, potential geological storage first requires a risk assessment of carbon dioxide escaping to overlying layers and back to the atmosphere through leakage pathways in the formation. This, in turn, requires an understanding of fluid flow through the leakage pathways. In this study, the effect of leakage pathways on the flow of a gravity current was investigated, using an analogue system, a Hele-Shaw cell. Fluid was introduced through the top edge of the cell and flowed out through one or more holes in its impermeable base. The height of the accumulated fluid above the base of the cell at various points along its length and the outflow rate of fluid through the holes was measured. This measurement was conducted with varying conditions of the location, number and strength of source as well as the location and number of holes. At steady state, the fluid motion was in accordance with Darcy's law for horizontal flow in a long thin current. In another set of experiments, in which inflow was stopped and the fluid was allowed to drain out of a single open hole, the outflow rate was in accordance with Darcy's law for one-dimensional flow in the vertical direction until the fluid height above the hole fell below a certain limit. This threshold height was found to be 1.3 cm, which was similar in magnitude to the length of the hole. A time series of photographs tracked the flow of colored dye. The photographs demonstrated that at steady state the fluid traveled for some distance beyond the hole before draining through it. This implies that contaminants may be transported in a formation even beyond an outlet before finally draining out through it. The photographs also documented the shape of the

  18. The effect of a crosslinking chemical reaction on pattern formation in viscous fingering of miscible fluids in a Hele-Shaw cell

    Science.gov (United States)

    Bunton, Patrick H.; Tullier, Michael P.; Meiburg, Eckart; Pojman, John A.

    2017-10-01

    Viscous fingering can occur in fluid motion whenever a high mobility fluid displaces a low mobility fluid in a Darcy type flow. When the mobility difference is primarily attributable to viscosity (e.g., flow between the two horizontal plates of a Hele-Shaw cell), viscous fingering (VF) occurs, which is sometimes termed the Saffman-Taylor instability. Alternatively, in the presence of differences in density in a gravity field, buoyancy-driven convection can occur. These instabilities have been studied for decades, in part because of their many applications in pollutant dispersal, ocean currents, enhanced petroleum recovery, and so on. More recent interest has emerged regarding the effects of chemical reactions on fingering instabilities. As chemical reactions change the key flow parameters (densities, viscosities, and concentrations), they may have either a destabilizing or stabilizing effect on the flow. Hence, new flow patterns can emerge; moreover, one can then hope to gain some control over flow instabilities through reaction rates, flow rates, and reaction products. We report effects of chemical reactions on VF in a Hele-Shaw cell for a reactive step-growth cross-linking polymerization system. The cross-linked reaction product results in a non-monotonic viscosity profile at the interface, which affects flow stability. Furthermore, three-dimensional internal flows influence the long-term pattern that results.

  19. Anisotropy in Alpedrete granite cutting (Rift, Grain and Hardway directions) and effect on bush hammered heritage ashlars

    Science.gov (United States)

    Freire-Lista, David Martin; Fort, Rafael

    2015-04-01

    Many monuments and cities that are part of humanity's heritage have been built with carved granite ashlars. This dimension stone is one of the most used due to its abundance and durability. Traditional quarrymen have used anisotropic planes to cut granite blocks in the quarry for improved cutting performance. These planes are called Rift, Grain and Hardway (R, G, H) according to the ease of cutting. The aim of this study is to determine the response of each of the three orthogonal cutting planes R, G and H to the craft styling with bush hammer, based on their decay. Alpedrete granite was selected for this research, it is a monzogranite quarried in the Sierra de Guadarrana (Spanish Central System) foothills, in the province of Madrid, Spain. It is one of the most representative of Madrid's heritage granites. Alpedrete granite is also used as building stone in other European cities. From an Alpedrete granite bush hammered ashlar, three thin sections were cut parallel to the H plane; these thin sections cut R and G bush hammered planes. Also three thin sections have been cut parallel to the R plane at a distance of 2 mm, 10 mm and 30 mm from the bush hammered surface. All thin sections have been treated with fluorescein. In each of the thin sections a micrograph mosaic was performed covering the entire area (about 10 cm2, 300 photomicrographs) and printed with 120 increases. The length and spacing of inter-, intra- and trans-crystalline microcracks were quantified and measured. Microcracks were subdivided based on affected minerals in each R, G and H planes. Through these observations it was found that Alpedrete Granite R plane (easier to cut) is determined by exfoliation microcracks orientation. That is, R plane is parallel to the exfoliations microcracks, which are intra-crystalline and straight. The cutting of stones in the R plane is due to the coalescence of straight microcracks in the plane. This plane minimizes the effort and cost of subsequent carving so it

  20. Tools of Thor - more than a hammer: An overview of some analysis methods for turbulence investigation

    Science.gov (United States)

    Haaland, Stein; Vaivads, Andris; Eriksson, Elin

    2016-04-01

    In the old Norse mythology Thor was a hammer-wielding god associated with thunder and lightning. THOR is also an acronym for Turbulence Heating ObserveR - a planned space mission dedicated to stydy space plasma turbulence. Whereas the mythological Thor did most of his work with a single tool, Mjølnir - his hammer, the modern version of THOR is far more versatile. The proposed THOR spacecraft comes with a comprehensive package of instruments to explore the energy dissipation and particle energization taking place in turbulent plasma environments. This paper presents a more detailed investigation of some of the analysis methods listed in the submitted THOR proposal. To demonstrate the methods, we have used data from existing spacecraft missions like Cluster and MMS to examine and compare single-spacecraft and multi-spacecraft methods to establish proper frames. The presented analysis methods are based on fundamental plasma laws, such as conservation of mass, momentum and energy and do not require any triangulation or gradients based on multiple spacecraft. Our experience based on Cluster and MMS results show that a well equipped single spacecraft platform, like the proposed THOR mission, very often provides better and less ambiguous results that a constellation of many spacecraft with less capable instrumentation. Limitations in underlying assumptions, such as planarity and linearity, as well as non-optimal spacecraft separation and configurations often limit the possibility to utilize multi-spacecraft methods. We also investigate the role of time resolution and dynamical range of the measurements used in the methods. Since the particle instruments onboard THOR will have a much better time resolution than existing magnetospheric satellite missions, we infer that THOR will be far better suited to resolve time evolution in plasma structures. This is of particular importance in the solar wind and magnetosheat, where frame velocities can be very high. With a larger

  1. Test to Extract Soil Properties Using the Seismic HammerTM Active Seismic Source

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Rebekah F. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Abbott, Robert E. [Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

    2017-08-01

    Geologic material properties are necessary parameters for ground motion modeling and are difficult and expensive to obtain via traditional methods. Alternative methods to estimate soil properties require a measurement of the ground's response to a force. A possible method of obtaining these measurements is active-source seismic surveys, but measurements of the ground response at the source must also be available. The potential of seismic sources to obtain soil properties is limited, however, by the repeatability of the source. Explosives, and hammer surveys are not repeatable because of variable ground coupling or swing strength. On the other hand, the Seismic Hammer TM (SH) is consistent in the amount of energy it inputs into the ground. In addition, it leaves large physical depressions as a result of ground compaction. The volume of ground compaction varies by location. Here, we hypothesize that physical depressions left in the earth by the SH correlate to energy recorded by nearby geophones, and therefore are a measurement of soil physical properties. Using measurements of the volume of shot holes, we compare the spatial distribution of the volume of ground compacted between the different shot locations. We then examine energy recorded by the nearest 50 geophones and compare the change in amplitude across hits at the same location. Finally, we use the percent difference between the energy recorded by the first and later hits at a location to test for a correlation to the volume of the shot depressions. We find that: * Ground compaction at the shot-depression does cluster geographically, but does not correlate to known surface features. * Energy recorded by nearby geophones reflects ground refusal after several hits. * There is no correlation to shot volume and changes in energy at particular shot locations. Deeper material properties (i.e. below the depth of surface compaction) may be contributing to the changes in energy propagation. * Without further

  2. "Et afsluttet hele"

    DEFF Research Database (Denmark)

    Skouvig, Laura

    2017-01-01

    fortolkninger. With a starting point in rhetorical genre theory the author investigates in this article how different editors of the Illustrated News understood information and how these different understandings were expressed in the magazine. The Illustrated News was a Danish equivalent to e.g. the Illustrated...... London News and appeared between 1859-1924 – a period that witnessed many changes in the media landscape in Denmark. The first editors invoked an understanding of a maelstrom of news and events that left readers lacking a broad view of the daily news. The advantage of the weekly magazine according...... to the formulation of the editors was to construct a comprehensive view. With this a perceived need for information was created: that it was possible to make give an overview over the rapidly changing news and events by communicating information and by using illustrations. Inspired by rhetorical genre theory...

  3. Economic Contribution to Local Livelihoods and Households Dependency on Dry Land Forest Products in Hammer District, Southeastern Ethiopia

    OpenAIRE

    Fikir, Dagm; Tadesse, Wubalem; Gure, Abdella

    2016-01-01

    The study was conducted in Hammer district, Southern Ethiopia, to provide empirical evidence on economic contribution to local livelihoods and households dependency on dry forest products. One agropastoral and two pastoral kebeles were purposively selected, and data was collected through household survey, group discussions, market assessments, and field observation. A total of 164 households, selected based on a random sampling procedure, were interviewed using structured questionnaire. The s...

  4. Active Precharge Hammering to Monitor Displacement Damage Using High-Energy Protons in 3x-nm SDRAM

    Science.gov (United States)

    Lim, Chulseung; Park, Kyungbae; Baeg, Sanghyeon

    2017-02-01

    This paper proposes the Active Precharge Hammering on a Row (APHR) test to evaluate displacement damage (DD) in 3x-nm DRAM components. Irradiated SDRAM devices could have multiple current leakage paths, partly owing to DD effects. The degree of leakage from cells with DD can be differentiated from undamaged cells by the difference in the number of hammered accesses to the two types of cells. Proton-based SER tests were performed with DDR3 SDRAM components made using 3x-nm technologies. The experimental results showed that bit errors caused by the APHR test (APHR errors) were more than five times higher in the irradiated sample compared to the non-irradiated sample, and APHR errors were not detectable within 64-ms retention time using the traditional retention test method. In the worst case, the number of hammerings required to cause an APHR error in the irradiated sample reduced by 36 times compared to that in the non-irradiated sample even after the irradiated sample was annealed at 150° C so as to have no retention errors within the maximum retention time of 64-ms.

  5. Study on the abrasion property of the anvil inside a hydraulic DTH hammer fitted with horizontal oriented sliders

    Directory of Open Access Journals (Sweden)

    J. He

    2017-10-01

    Full Text Available Hydraulic hammers have been extensively applied to horizontal directional well drilling in hard rock formations. However, the service life of a hydraulic hammer is still unsatisfactory due to the heavy wear or abrasion of the horizontal anvil, which leads to the failure and the reduction of service life in directional well drilling. In order to improve the performance life of a hydraulic hammer, the new type of anvil with a horizontal oriented slider has been designed. The abrasion property of the horizontal oriented slider have been numerically simulated and analyzed by Finite Element Analysis. Simulation and experimental results have shown that the abrasion rate exponentially varies with the mass of the anvil and the friction coefficient of horizontal oriented slider, nevertheless the abrasion rate of horizontal anvil is almost logarithmically varies with moving velocity of oriented slider. The maximum abrasion rate of horizontal oriented sliders will exceed 4% while moving velocity of the horizontal anvil is larger than 3m/s. While the mass of the anvil is 100kg, the maximum abrasion rate of horizontal oriented slider is 7.5?. However, the maximum abrasion rate of a horizontal oriented slider will be up to 16.5% while the friction coefficient is more than 0.2

  6. The effect of cryogenic grinding and hammer milling on the flavour quality of ground pepper (Piper nigrum L.).

    Science.gov (United States)

    Liu, Hong; Zeng, Fankui; Wang, Qinghuang; Ou, Shiyi; Tan, Lehe; Gu, Fenglin

    2013-12-15

    In this study, we compared the effects of cryogenic grinding and hammer milling on the flavour attributes of black, white, and green pepper. The flavour attributes were analysed using headspace solid-phase micro-extraction (HS-SPME) and gas chromatography-mass spectrometry (GC/MS), sensory evaluation and electronic nose (e-nose) analysis. Cryogenic grinding resulted in minimal damage to the colour, flavour, and sensory attributes of the spices. Cryogenic grinding was also better than hammer milling at preserving the main potent aroma constituents, but the concentrations of the main aroma constituents were dramatically reduced after storing the samples at 4 °C for 6 months. Pattern matching performed by the e-nose further supported our sensory and instrumental findings. Overall, cryogenic grinding was superior to hammer milling for preserving the sensory properties and flavour attributes of pepper without significantly affecting its quality. However, we found that the flavour quality of ground pepper was reduced during storage. Copyright © 2013 Elsevier Ltd. All rights reserved.

  7. Fractal dynamics in dexterous tool use: the case of hammering behavior of bead craftsmen.

    Science.gov (United States)

    Nonaka, Tetsushi; Bril, Blandine

    2014-02-01

    Dexterous behavior exhibits exquisite context sensitivity, implying the efficacy of exploration to detect the task-relevant information. Inspired by the recent finding that fractal scaling of exploratory movements predicts how well the movements sample available perceptual information, we investigate the possibility that dexterity of craftsmen would be characterized by fractal (long-range) temporal correlation properties of fluctuations in their movement wielding a tool. A reanalysis of hammering behavior involved in stone beads production in India (Nonaka & Bril, 2012) revealed the presence of long-range, power-law correlations, as part of multiplicative cascades operating over a wide range of time scales. In the unfamiliar condition using unusual material, the wielding behavior of highly skilled experts displayed a significant increase of long-range temporal correlations, whereas that of less experts exhibited a significant loss of long-range correlations and reduced heterogeneity of scaling properties over time, which robustly discriminated the groups with different skill levels. Alterations in long-range correlation properties of movement fluctuations are apparently associated with changes in the situation differently depending on the level of expertise. PsycINFO Database Record (c) 2014 APA, all rights reserved.

  8. A focused liquid jet formed by a water hammer in a test tube

    CERN Document Server

    Kiyama, Akihito; Ando, Keita; Kameda, Masaharu

    2015-01-01

    We investigate motion of a gas-liquid interface in a test tube induced by a large acceleration via impulsive force. We conduct simple experiments in which the tube partially filled with a liquid falls under gravity and impacts a rigid floor. A curved gas-liquid interface inside the tube reverses and eventually forms an elongated jet (i.e. the so-called a focused jet). In our experiments, there arises either vibration of the interface or increment in the velocity of a liquid jet accompanied by the onset of cavitation in the liquid column. These phenomena cannot be explained by considering pressure impulse in a classical potential flow analysis, which does not account for finite speeds of sound as well as phase change. Here we model such water-hammer events as a result of one-dimensional pressure wave propagation and its interaction with boundaries through acoustic impedance mismatching. The method of characteristics is applied to describe pressure wave interactions and the subsequent cavitation. The proposed m...

  9. Theoretical Study of Steam Condensation Induced Water Hammer Phenomena in Horizontal Pipeline

    CERN Document Server

    Barna, Imre Ferenc

    2014-01-01

    We investigate steam condensation induced water hammer (CIWH) phenomena and present new theoretical results. We use the WAHA3 model based on two-phase flow six first-order partial differential equations that present one dimensional, surface averaged mass, momentum and energy balances. A second order accurate high-resolution shock-capturing numerical scheme was applied with different kind of limiters in the numerical calculations. The applied two-fluid model shows some similarities to Relap5 which is widely used in the nuclear industry to simulate nuclear power plant accidents. This model was validated with different CIWH experiments which were performed in the PMK-2 facility, which is a full-pressure thermo-hydraulic model of the nuclear power plant of VVER-440/312 type in the Energy Research Center of the Hungarian Academy of Sciences in Budapest and in the Rosa facility in Japan. In our recent study we show the first part of a planned large database which will give us the upper and lower flooding mass flow ...

  10. Water hammer effect in the spiral case and penstock of Francis turbines

    Science.gov (United States)

    Pepa, D.; Ursoniu, C.; Gillich, R. N.; Campian, C. V.

    2017-01-01

    Sudden pressure increases in the penstock or spiral case of a hydraulic turbine are the effect of sudden flow variation that occur during transient processes of type opening / closing or load rejection of the hydro unit. The consequence of the pressure rise in the spiral case and penstock is the water hammer phenomenon, whose effects can be devastating in some cases, up to breaking pipes and calamities produced in the area. This paper aims to analyze the method of calculation of the maximum pressure values that might occur in load rejection situations to a hydraulic turbine, in spiral case and in penstock, conditioned by the limiting of the values of the over speed and measures of limiting the increase in pressure in conjunction with limiting the increase in speed in these specific processes. As an example, we studied and analyzed the situation of a hydroelectric power plant equipped with a 7.8 MW Francis turbine without pressure regulator and the inflow surge. The results of analytical calculation overlaid on the experimental measurements performed during the performance tests of the hydro unit lead to the conclusion that the calculation algorithm proposed has been chosen correctly and the 2-stage closing law of the wicket gate promoted in this case is effective in such situations.

  11. Improving ATLAS grid site reliability with functional tests using HammerCloud

    Science.gov (United States)

    Elmsheuser, Johannes; Legger, Federica; Medrano Llamas, Ramon; Sciacca, Gianfranco; van der Ster, Dan

    2012-12-01

    With the exponential growth of LHC (Large Hadron Collider) data in 2011, and more coming in 2012, distributed computing has become the established way to analyse collider data. The ATLAS grid infrastructure includes almost 100 sites worldwide, ranging from large national computing centers to smaller university clusters. These facilities are used for data reconstruction and simulation, which are centrally managed by the ATLAS production system, and for distributed user analysis. To ensure the smooth operation of such a complex system, regular tests of all sites are necessary to validate the site capability of successfully executing user and production jobs. We report on the development, optimization and results of an automated functional testing suite using the HammerCloud framework. Functional tests are short lightweight applications covering typical user analysis and production schemes, which are periodically submitted to all ATLAS grid sites. Results from those tests are collected and used to evaluate site performances. Sites that fail or are unable to run the tests are automatically excluded from the PanDA brokerage system, therefore avoiding user or production jobs to be sent to problematic sites.

  12. Dead-blow hammer design applied to a calibration target mechanism to dampen excessive rebound

    Science.gov (United States)

    Lim, Brian Y.

    1991-01-01

    An existing rotary electromagnetic driver was specified to be used to deploy and restow a blackbody calibration target inside of a spacecraft infrared science instrument. However, this target was much more massive than any other previously inherited design applications. The target experienced unacceptable bounce when reaching its stops. Without any design modification, the momentum generated by the driver caused the target to bounce back to its starting position. Initially, elastomeric dampers were used between the driver and the target. However, this design could not prevent the bounce, and it compromised the positional accuracy of the calibration target. A design that successfully met all the requirements incorporated a sealed pocket 85 percent full of 0.75 mm diameter stainless steel balls in the back of the target to provide the effect of a dead-blow hammer. The energy dissipation resulting from the collision of balls in the pocket successfully dampened the excess momentum generated during the target deployment. The disastrous effects of new requirements on a design with a successful flight history, the modifications that were necessary to make the device work, and the tests performed to verify its functionality are described.

  13. Research on Radial Motion Characteristic of the Cropping Hammer in Radial-Forging Cropping Method

    Directory of Open Access Journals (Sweden)

    Lijun Zhang

    2015-01-01

    Full Text Available The radial loading form applied to the bar is very important for reducing or avoiding the impact and vibration of the radial-forging cropping system and obtaining the high-quality cross section. A new radial stroke loading curve of the cropping hammer based on the cycloid form is proposed and the dynamic model of radial stroke loading mechanism is built. With the aim of obtaining the equivalent stiffness of the bar with V-shaped notch, which is a key parameter affecting the dynamic characteristic of radial stroke loading mechanism, the analytic model of the bar is built and the simulation experiments are designed by means of the orthogonal test method. The analytical results show that the diameter of the bar has the significant influence on the equivalent stiffness of the bar. Furthermore, the equivalent stiffness of the bar with V-shaped notch can be directly calculated according to the equivalent stiffness of smooth bar when h/d0.15. By using the cycloid stroke curve, the cropping experimental results for 45 steel bars and 20 steel bars show that the radial impact and vibration of the cropping system are decreased and the bar cross-section qualities have been significantly improved.

  14. Flow of Power-Law Liquids in a Hele-Shaw Cell Driven by Non-Uniform Electroosmotic Slip in the Case of Strong Depletion

    CERN Document Server

    Boyko, Evgeniy; Gat, Amir D

    2016-01-01

    We analyze flow of non-Newtonian fluids in a Hele-Shaw cell, subjected to spatially non-uniform electroosmotic slip. Motivated by their potential use for increasing the characteristic pressure fields, we specifically focus on power-law fluids with wall depletion properties. We derive a p-Poisson equation governing the pressure field, as well as a set of linearized equations representing its asymptotic approximation for weakly non-Newtonian behavior. To investigate the effect of non-Newtonian properties on the resulting fluidic pressure and velocity, we consider several configurations in one- and two-dimensions, and calculate both exact and approximate solutions. We show that the asymptotic approximation is in good agreement with exact solutions even for fluids with significant non-Newtonian behavior, allowing its use in the analysis and design of microfluidic systems involving electro-kinetic transport of such fluids.

  15. Power consumption and quality features in the hammer crushing process for olive oil production

    Directory of Open Access Journals (Sweden)

    Bianchi, B.

    1996-06-01

    Full Text Available In a previous research, a preliminary analysis on the thermal balance in different crushing systems for olive oil production was carried out. According to the previous results, in this paper the study has been extended to power consumption aspects related to the main quality features of the extracted olive oil, restricting the analysis only to the hammer crushing (Coratina cultivar, which represents the worst case. In particular, the effect of the olives delivery on the power consumption and quality of the extracted oil has been studied. The experimental trials, carried out on a laboratory plant during the 1993-94 and 1994-95 olive-oil seasons, show that, even though the diagram of power consumption has a parabolic increasing trend, the specific power decreases with the olives delivery. Anyway studying the olives hammer crushing process also from the qualitative point of view (polyphenols number, acidity, peroxide number and induction time, it is possible to define an optimal range of olives delivery values. This optimal range (140 kg/h-240 kg/h for the studied hammer crusher represents the better working solution from both the point of view of the power consumption and the quality of the extracted oil. In particular, at the beginning of the olive oil season it is necessary to work near the greatest lower bound of the optimal range just defined. With the passing of the harvesting time, the olives delivery has to be increased, reaching values near the greatest higher bound at the end of the olive oil season.

    En una investigación previa, se ha llevado a cabo un análisis preliminar sobre el balance térmico en diferentes sistemas de trituración para la producción de aceite de oliva. De acuerdo con los resultados previos, en este trabajo el estudio se ha extendido a aspectos del consumo energético relacionados con las principales características de calidad del aceite de oliva extraído, limitando el análisis sólo a la trituraci

  16. Euroopa jazzieksperdid Tallinnas / Ivo Heinloo

    Index Scriptorium Estoniae

    Heinloo, Ivo

    2011-01-01

    Jazziorganisatsioonist Europe Jazz Network, kes pidas 22.-25. septembrini Tallinnas oma aastakonverentsi ja selle raames Von Krahli teatris toimunud Tallinn Jazz Weekendi eesti jazzmuusika showcase-festivalist

  17. Why is that hammer in my coffee? A multimodal imaging investigation of contextually-based tool understanding.

    Directory of Open Access Journals (Sweden)

    J.C. eMizelle

    2010-12-01

    Full Text Available Appropriate tool-object pairing is a natural part of our lives. When preparing to stir coffee, we know that a hammer is useful for some tasks but that it is not appropriate in this behavioral context. The neural correlates of this context-tool pairing process remain unclear. In the current work, we used event-related electroencephalography (EEG and functional magnetic resonance imaging (fMRI to determine neural correlates for differentiating contextually correct and incorrect tool use. Subjects were shown images depicting correct (e.g., spoon used to stir coffee or incorrect (e.g., hammer used to stir coffee tool use. We identified distinct regional and temporal activations for identifying incorrect versus correct tool use. The posterior cingulate, insula and superior temporal gyrus preferentially differentiated incorrect tool-object usage, while occipital, parietal and frontal areas were active in identifying correct tool use. Source localized EEG analysis confirmed the fMRI data and showed phases of activation, where incorrect tool-use activation (0 - 200 ms preceded occipitotemporal activation for correct tool use (300 - 400 ms. This work extends our previous findings to better identify the neural substrate for contextual evaluation of tool use, and may contribute to our understanding of neurological disorders resulting in tool-use deficits.

  18. A Novel Hammer-Shaped UWB Antenna with Triple Notched-Band for Rejecting RLS, WLAN and XSCS bands

    Directory of Open Access Journals (Sweden)

    H. S. Mewara

    2017-10-01

    Full Text Available A novel hammer-shaped UWB printed antenna with triple notched stop bands is presented and fabricated on FR-4 substrate with size of 40×40×1.6 mm3. The proposed antenna is composed of hammer-shaped patch with C-shaped slot, U-shaped slot on feed line, and inverted stepped notch and bevel edges with pair of L-shaped slots in partial ground plane. The fabricated antenna is tested and obtained impedance bandwidth 2.89 ̶ 11.6 GHz with three notched stop bands 3.15 ̶ 3.7 GHz, 5.45 ̶ 6.8 GHz, and 7.5 ̶  8.8 GHz, for radiolocation system (RLS, wireless local area networks (WLAN, and X-band satellite communication system (XSCS bands, respectively. Moreover, the antenna result shows omnidirectional radiation pattern, average gain of 3.10 dBi over the whole UWB band except at the notched frequency bands.

  19. Acute effects of vibration from a chipping hammer and a grinder on the hand-arm system.

    Science.gov (United States)

    Kihlberg, S; Attebrant, M; Gemne, G; Kjellberg, A

    1995-11-01

    The purpose of this study was to compare various effects on the hand-arm system of vibration exposure from a chipping hammer and a grinder with the same frequency weighted acceleration. Grip and push forces were measured and monitored during the exposure. The various effects were: muscle activity (measured with surface electrodes), discomfort ratings for different parts of the hand-arm system (made during and after exposure), and vibration perception threshold (for 10 minutes before and 10 minutes after the exposure). No increase in muscle activity due to exposure to vibration was found in the hand muscle studied. In the forearm, conversely, there was an increase in both muscle studied. For the upper arm the muscle activity only increased when exposed to impact vibration. Subjective ratings in the hand and shift in vibration perception threshold were effected more by the grinder than the hammer exposure. These results show that the reaction of the hand-arm system to vibration varies with frequency quantitatively as well as qualitatively. They do not support the notion that one single frequency weighted curve would be valid for the different health effects of hand-arm vibration (vascular, musculoskeletal, neurological, and psychophysiological).

  20. Dermal safety assessment of Arm & Hammer laundry products formulated for sensitive skin.

    Science.gov (United States)

    Frederick, Douglas M; Vorwerk, Linda; Gupta, Archana; Ghassemi, Annahita

    2017-09-01

    product (Arm & Hammer Free & Clear) and other nonirritant controls. In the Wrist Band Wear test, exposure to laundered fabrics under exaggerated conditions gave similar results for the test and control products, with no objective signs of skin irritation, and no self-reported persistent adverse sensory effects. Very mild, transient and isolated sensory effects were noted in daily diaries by a small proportion of subjects, and were similar for the test and control products. The Safety In-Use tests evaluated 4-week exposure to product and laundered fabrics under realistic use conditions. There were no clinically objective signs of skin irritation, and reports of transitory, mild sensory effects were minimal and similar for the test and controls. A comprehensive skin safety program on a lightly scented sensitive skin laundry formulation (i.e. Arm & Hammer™ Sensitive Skin plus Skin-Friendly Fresh Scent) conducted among panels of self-assessed sensitive skin subjects demonstrated that the presence of a light fragrance did not adversely impact skin compatibility in any of the testing protocols when the product was compared to a similar product with no fragrance. The lightly fragranced product demonstrated overall skin compatibility and mildness when tested in a self-assessed sensitive skin population, and compared favorably to currently marketed sensitive skin products.

  1. Highly Unstable Double-Diffusive Finger Convection in a Hele-Shaw Cell: Baseline Experimental Data for Evaluation of Numerical Models

    Energy Technology Data Exchange (ETDEWEB)

    PRINGLE,SCOTT E.; COOPER,CLAY A.; GLASS JR.,ROBERT J.

    2000-12-21

    An experimental investigation was conducted to study double-diffusive finger convection in a Hele-Shaw cell by layering a sucrose solution over a more-dense sodium chloride (NaCl) solution. The solutal Rayleigh numbers were on the order of 60,000, based upon the height of the cell (25 cm), and the buoyancy ratio was 1.2. A full-field light transmission technique was used to measure a dye tracer dissolved in the NaCl solution. They analyze the concentration fields to yield the temporal evolution of length scales associated with the vertical and horizontal finger structure as well as the mass flux. These measures show a rapid progression through two early stages to a mature stage and finally a rundown period where mass flux decays rapidly. The data are useful for the development and evaluation of numerical simulators designed to model diffusion and convection of multiple components in porous media. The results are useful for correct formulation at both the process scale (the scale of the experiment) and effective scale (where the lab-scale processes are averaged-up to produce averaged parameters). A fundamental understanding of the fine-scale dynamics of double-diffusive finger convection is necessary in order to successfully parameterize large-scale systems.

  2. CFD simulation of reverse water-hammer induced by collapse of draft-tube cavity in a model pump-turbine during runaway process

    Science.gov (United States)

    Zhang, Xiaoxi; Cheng, Yongguang; Xia, Linsheng; Yang, Jiandong

    2016-11-01

    This paper reports the preliminary progress in the CFD simulation of the reverse water-hammer induced by the collapse of a draft-tube cavity in a model pump-turbine during the runaway process. Firstly, the Fluent customized 1D-3D coupling model for hydraulic transients and the Schnerr & Sauer cavitation model for cavity development are introduced. Then, the methods are validated by simulating the benchmark reverse water-hammer in a long pipe caused by a valve instant closure. The simulated head history at the valve agrees well with the measured data in literature. After that, the more complicated reverse water-hammer in the draft-tube of a runaway model pump-turbine, which is installed in a model pumped-storage power plant, is simulated. The dynamic processes of a vapor cavity, from generation, expansion, shrink to collapse, are shown. After the cavity collapsed, a sudden increase of pressure can be evidently observed. The process is featured by a locally expending and collapsing vapor cavity that is around the runner cone, which is different from the conventional recognition of violent water- column separation. This work reveals the possibility for simulating the reverse water-hammer phenomenon in turbines by 3D CFD.

  3. First attempt to study rock glaciers in New Zealand using the Schmidt-hammer - framework and preliminary results

    Science.gov (United States)

    Winkler, Stefan; Lambiel, Christophe; Sattler, Katrin; Büche, Thomas; Springer, Johanna

    2016-04-01

    Although not uncommon within the dryer eastern parts of the Southern Alps, New Zealand, comparatively few previous studies have previously focused on rock glacier dynamics and spatial distribution. Neither investigations of their chronological constraints nor any studies on actual rock glacier velocities have yet been carried out. Rock glaciers and periglacial processes still largely constitute a largely unexplored albeit potentially valuable field of research in the Southern Alps. The high-altitude valley head of Irishman Stream in the Ben Ohau Range between Lakes Ohau and Pukaki, roughly 30 km southeast of the Main Divide, contains a few morphologically intact rock glaciers and some appear to be active features (Sattler et al. 2016). Previous work focusing on the Late-glacial and early Holocene moraines in the valley head below the rock glaciers (Kaplan et al. 2010) provided 10Be-ages that could be utilised as fixed points for SHD (Schmidt-hammer exposure-age dating). Apart from detailed Schmidt-hammer sampling on the Late-glacial and early Holocene moraines, two altitudinal transects from the toe to their apex have been measured in detail on selected rock glaciers. On each of the multiple ridges of the rock glacier surface three sites of 50 boulders have been sampled with one impact each by the hammer (an N-type electronic SilverSchmidt by Proceq). Apart from getting some age constraints of these periglacial features in comparison to the well-dated moraines, the Schmidt-hammer measurements also had the aim to provide some insight into their genetic development resulting in a quite complex morphology of the rock glaciers and partial interaction with some of the moraines. Both altitudinal transects reveal a clear and continuous trend of increasing means (i.e. less weathered/younger exposure ages) towards their apex. The values for the individual ridges show, however, a transitional character with adjacent ridges albeit the abovementioned trend not statistically

  4. WATER ENERGY IN HYDROAMELIORATIVE SYSTEMS USING THE HYDRAULIC TRANSFORMER TYPE A. BARGLAZAN AND THE HYDRAULIC HAMMER (HYDRAULIC PUMP

    Directory of Open Access Journals (Sweden)

    Teodor Eugen Man

    2010-01-01

    Full Text Available This paper presents two examples of exploitation of water energy that can be used in the irrigation field. First of theseexamples is the hydraulic transformer type A. Barglazan used for irrigation, pumped water is taken directly from theriver’s well, using a hydraulic pump which simultaneously carried out a double transformation in this way: hydraulicenergy into mechanic energy and mechanical energy into hydraulic energy. Technology preparation and devices designwas done in record time, seeing that this constructive solution is more robust, reliable and with improved energyperformance versus the laboratory prototype. The experimental research which was made at 1:1 scale proved theirgood function over time. Another example is the hydraulic hammer (hydraulic pump that uses low-head energy topump water, with a global efficiency of about 10 - 50%. Currently, the new situation of private ownership of landprovides conditions for new pumping microstations to be made where irrigation is necessary and optimal hydrauliclocations exist.

  5. Skull wounds linked with blunt trauma (hammer example). A report of two depressed skull fractures--elements of biomechanical explanation.

    Science.gov (United States)

    Delannoy, Yann; Becart, Anne; Colard, Thomas; Delille, Rémi; Tournel, Gilles; Hedouin, Valéry; Gosset, Didier

    2012-09-01

    The lesions of the skull following perforating traumas can create complex fractures. The blunt traumas can, according to the swiftness and the shape of the object used, create a depressed fracture. The authors describe through two clinical cases the lesional characteristic of the blunt traumas, perforating the skull using a hammer. In both cases the cranial lesions were very typical: they were geometrical, square shaped, of the same size than the tool (head and tip of the hammer). On the outer table of the skull, the edges of the wounds were sharp and regular. On the inner table, the edges of the wounds were beveled and irregular. The bony penetration in the depressed fracture results from a rupture of the outer table of the bone under tension, in periphery, by the bend of the bone to the impact (outbending) and then, from the inner table with comminuted bony fragmentation. Breeding on the fractures of the size and the shape of the blunt objects used is inconstant and differs, that it is the objects of flat surface or wide in opposition to those of small surface area. Fractures morphologies depend on one hand on these extrinsic factors and on the other hand, of intrinsic factors (structure of the bone). To identify them, we had previously conducted experimental work on cranial bone samples. The bone was submitted to a device for three-point bending. This work had shown properties of thickness and stiffness of the various areas of the vault. Our cases are consistent with these results and illustrate the variability of bone lesions according to region and mode of use of blunt weapons. Many studies have identified criteria for identification of the weapons and the assistance of digital and biomechanical models will be an invaluable contribution with this aim in the future. Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.

  6. STUDY OF WATER HAMMERS IN THE FILLING OF THE SYSTEM OF PRESSURE COMPENSATION IN THE WATER-COOLED AND WATER-MODERATED POWER REACTORS

    Directory of Open Access Journals (Sweden)

    A. V. Korolyev

    2017-01-01

    Full Text Available The research presented in the article conforms to the severe accident that took place at the Three Mail Island nuclear power plant in the USA. The research is focused on improving the reliability of the pressure compensator that is an important equipment of the primary circuit. In order to simulate such a situation, the stand has been developed to simulate the design of the pressurizer of the PWR-440 reactor, in particular an elliptical shape of the upper lid which has a steam outlet pipe at the top of the construction that creates conditions for occurrence of such water hammers. For the experiments, an installation has been created that makes it possible to measure and record the water hammering that occur when the tanks are filled. Measurement of the amplitude of the water hammering was carried out by a specially developed piezoelectric sensor, and the registration – by a light-beam oscilloscope. The technique of carrying out the experiment is described and the results of an experimental study of the water hammers arising when the vessels are completely filled are presented. Quantitative data were obtained on the amplitudes of the hydraulic impacts depending on the rate of filling of the vessel and the diameter of the outlet, the maximum pressure of the hydraulic shock was 7–9 atm. Comparison of calculated and experimental data has been performed. The allowable discrepancy is explained by the calculated value of the system stiffness coefficient, which did not take into account the presence of welded seams in the tank that imparts the system with additional rigidity. The calculated relationships are obtained, that make it possible to estimate the amplitudes of the water hammers through the acceleration of the water level in front of the outlet from a vessel with an elliptical bottom. The possibility of a water hammer in the pressure compensator is demonstrated by experiment and by theoretical calculations. Based on the experimental data, a

  7. Evaluasi Unjuk Kerja Sistem Proteksi Water Hammer pada Sistem Perpipaan (Studi Kasus Di Rumah Pompa Produksi Unit Instalasi Pengolahan Air Minum (IPAM Karang Pilang 2 PT. PDAM Surya Sembada Surabaya

    Directory of Open Access Journals (Sweden)

    Handi Prasetya

    2017-01-01

    Full Text Available Sistem jaringan perpipaan merupakan komponen penting dalam menunjang produksi maupun distribusi pada sektor industri. Jaringan perpipaan mengalami beberapa fenomena seperti distribusi fluida dan water hammer. Water hammer sering terjadi di daerah discharge pompa pada saat pengoperasian pompa maupun pada saat kegagalan operasi pompa. Beberapa cara untuk mengurangi dampak water hammer adalah dengan menambahkan flywheel ataupun gas accumulator pada jaringan perpipaan. Lonjakan tekanan serta aliran balik yang terjadi akibat fenomena water hammer akan dilawan oleh putaran impeller  pompa yang dibebani oleh flywheel dan akan memperlambat lonjakan tekanan dalam pipa dan tekanan yang berlebih akan dibuang ke gas accumulator sehingga tekanan dalam pipa berangsur stabil. Pemodelan sistem perpipaan dilakukan dengan menggunakan software sistem perpipaan. Pemodelan yang disimulasikan merupakan sistem perpipaan dengan rangkaian pompa paralel yang dilengkapi flywheel pada instalasi pompa dan divariasikan dengan penambahan gas accumulator sebagai sistem proteksi water hammer. Analisa yang dilakukan adalah untuk mempelajari fenomena water hammer pada saat kondisi ekstrim yakni ketika dua pompa operasi mati dan juga ketika empat pompa operasi mati, untuk melihat pengaruh variasi ukuran flywheel terhadap fluktuasi tekanan yang terjadi. Ukuran flywheel divariasikan yakni ukuran diameter luar 1100mm, 1200mm dan 1300mm dengan tebal masing-masing 300mm, 400mm dan 500mm. Hasil simulasi menunjukkan bahwa pada sistem perpipaan tanpa menggunakan gas accumulator, tekanan maksimum yang terjadi pada discharge pompa mencapai 19,807 bar dari kondisi tekanan kerjanya 5,6 bar. Variasi ukuran flywheel memberi dampak pada perlambatan terjadinya lonjakan tekanan, semakin besar ukuran flywheel akan menunda terjadinya lonjakan tekanan akibat water hammer. Dan penambahan gas accumulator berperan dalam meredam serta mempersingkat waktu terjadinya lonjakan tekanan, sehingga fluktuasi

  8. Numerical simulation of water hammer in low pressurized pipe: comparison of SimHydraulics and Lax-Wendroff method with experiment

    Directory of Open Access Journals (Sweden)

    Himr D.

    2013-04-01

    Full Text Available Article describes simulation of unsteady flow during water hammer with two programs, which use different numerical approaches to solve ordinary one dimensional differential equations describing the dynamics of hydraulic elements and pipes. First one is Matlab-Simulink-SimHydraulics, which is a commercial software developed to solve the dynamics of general hydraulic systems. It defines them with block elements. The other software is called HYDRA and it is based on the Lax-Wendrff numerical method, which serves as a tool to solve the momentum and continuity equations. This program was developed in Matlab by Brno University of Technology. Experimental measurements were performed on a simple test rig, which consists of an elastic pipe with strong damping connecting two reservoirs. Water hammer is induced with fast closing the valve. Physical properties of liquid and pipe elasticity parameters were considered in both simulations, which are in very good agreement and differences in comparison with experimental data are minimal.

  9. Economic Contribution to Local Livelihoods and Households Dependency on Dry Land Forest Products in Hammer District, Southeastern Ethiopia

    Directory of Open Access Journals (Sweden)

    Dagm Fikir

    2016-01-01

    Full Text Available The study was conducted in Hammer district, Southern Ethiopia, to provide empirical evidence on economic contribution to local livelihoods and households dependency on dry forest products. One agropastoral and two pastoral kebeles were purposively selected, and data was collected through household survey, group discussions, market assessments, and field observation. A total of 164 households, selected based on a random sampling procedure, were interviewed using structured questionnaire. The study found that income from forest products contributes 21.4% of the total annual household income. The major dry forest products include honey, fuel wood, gum and resin, and crafts and construction materials, contributing 49%, 39%, 6%, and 6% of the forest income, respectively. Households of the pastoral site earned more forest income and were relatively more dependent on forest products income than those in the agropastoral study site. Significant variation was also found among income groups: households with higher total annual income obtain more forest income than those with lower income, but they are relatively less dependent on forest products than the lower counterpart. Besides, various socioeconomic and contextual factors were found to influence forest income and dependency. The findings of the study provide valuable information up on which important implications for dry land forest development and management strategies can be drawn.

  10. Robust Sub-harmonic Mixer at 340 GHz Using Intrinsic Resonances of Hammer-Head Filter and Improved Diode Model

    Science.gov (United States)

    Wang, Cheng; He, Yue; Lu, Bin; Jiang, Jun; Miao, Li; Deng, Xian-Jin; Xiong, Yong-zhong; Zhang, Jian

    2017-11-01

    This paper presents a sub-harmonic mixer at 340 GHz based on anti-parallel Schottky diodes (SBDs). Intrinsic resonances in low-pass hammer-head filter have been adopted to enhance the isolation for different harmonic components, while greatly minimizing the transmission loss. The application of new DC grounding structure, impedance matching structure, and suspended micro-strip mitigates the negative influences of fabrication errors from metal cavity, quartz substrate, and micro-assembly. An improved lumped element equivalent circuit model of SBDs guarantees the accuracy of simulation, which takes current-voltage (I/V) behavior, capacitance-voltage (C/V) behavior, carrier velocity saturation, DC series resistor, plasma resonance, skin effect, and four kinds of noise generation mechanisms into consideration thoroughly. The measurement indicates that with local oscillating signal of 2 mW, the lowest double sideband conversion loss is 5.5 dB at 339 GHz; the corresponding DSB noise temperature is 757 K. The 3 dB bandwidth of conversion loss is 50 GHz from 317 to 367 GHz.

  11. Analysis of Water Hammer with Different Closing Valve Laws on Transient Flow of Hydrogen-Natural Gas Mixture

    Directory of Open Access Journals (Sweden)

    Norazlina Subani

    2015-01-01

    Full Text Available Water hammer on transient flow of hydrogen-natural gas mixture in a horizontal pipeline is analysed to determine the relationship between pressure waves and different modes of closing and opening of valves. Four types of laws applicable to closing valve, namely, instantaneous, linear, concave, and convex laws, are considered. These closure laws describe the speed variation of the hydrogen-natural gas mixture as the valve is closing. The numerical solution is obtained using the reduced order modelling technique. The results show that changes in the pressure wave profile and amplitude depend on the type of closing laws, valve closure times, and the number of polygonal segments in the closing function. The pressure wave profile varies from square to triangular and trapezoidal shape depending on the type of closing laws, while the amplitude of pressure waves reduces as the closing time is reduced and the numbers of polygonal segments are increased. The instantaneous and convex closing laws give rise to minimum and maximum pressure, respectively.

  12. Visual persuasion and politics: ideology and symbols of the totalitarian regimes'--case study: hammer and sickle.

    Science.gov (United States)

    Svilicić, Niksa; Maldini, Pero

    2013-06-01

    Unlike all other autocracies, authoritarian regimes are, as the ultimate form of authoritarianism, a distinct phenomenon of the modern era. Caused by the crisis of liberal democracy and industrial capitalism of the early twentieth century, and led by radical populist political movements/parties and their leaders, they established themselves as the regimes which marked one of the greatest degrees of unfreedom. The article analyzes the specific sociostructural, sociocultural and sociopsychological aspects of the formation of totalitarian regimes (particularly communism), as well as their political system, ideological foundations and modus operandi. In doing so, it particularly emphasizes the dissolution of civil society and its substitution by a political society as a key structural determinant, authoritarianism and fear as a sociopsychological basis, and repression as the functional basis of operation for totalitarian regimes. In that context, it analyzes the political, anthropological and visual aspects of the symbols of totalitarian regimes, their archetypal (mythological, religious, ethnic, cultural, historical) meaning, and explains their function (political, anthropological, sociocultural, and sociopsychological) in the development and preservation of totalitarian regimes. Using the example of the hammer and sickle, a typical symbol of communism, it shows a substantial and communicational (particularly visual) dimension of symbol, by breakdown by the elements of semiotics (signum, designatum, interpretant) and its sub-disciplines (semantics, pragmatics, sintactics). On this basis, it tries to show the decisive power of political symbols over the political perceptions and political behavior of individuals and entire social groups, i.e. their manipulative power by meanings assigned to them by totalitarian authorities and forms of their communication, with the goal of preserving the totalitarian regime.

  13. Comparison of Acoustic Energy Meter (AEM) and Schmidt hammer 'R' for rapid assessment of rock surface hardness: a preliminary assessment from southeast Queensland, Australia

    Science.gov (United States)

    Brook, Martin; Winkler, Stefan

    2015-04-01

    This research focuses on one of the key challenges in geomorphology - quantifying rock surface hardness via in situ measurements, to provide information on rock physical properties. This has been a focus in recent years with the rapid emergence of studies that center on surface and near surface weathering impacts, and rates of material loss. Indeed, a key element to understanding how weathering and erosion processes combine to influence rock surface (and landscape) evolution is the measurement and monitoring of rock surface hardness. We provide results from a preliminary assessment of the applicability of the Acoustic Energy Meter (AEM) to subaerial rock surface hardness, in comparison with an N-Type Schmidt hammer. The AEM apparatus consists of a geophone which is in contact with the rock surface and some electronics. The AEM is held normal to the surface to be tested and the surface is struck with a small hammer (typically 0.75 kg), with the AEM quantifying the decay time of seismically-induced oscillations within the top c. 1-2 m of the rock mass. Previous work using an AEM has focused on measuring roof stability and delamination in South African underground coal, gold and platinum mines, where long AEM reverberation times correlated well with weak rock mass and dense microfracturing. However, the technique has rarely been applied to the assessment of rock surfaces in a subaerial setting. We applied the technique to a range of lithologies at five sites in southeast Queensland in the Brisbane area, each an exposure of phyllite, granite, mudstone, argillite or volcanic tuff. The aims were: (1) quantifying the response of different rock masses to the AEM technique; and (2) assessing the applicability of the AEM as a rapid in situ measure of rock hardness by comparing results with Schmidt hammer 'R' values from the same exposures. Results showed that the AEM is useful in discriminating rock hardness across rocks with different lithological properties. Second, an

  14. Water hammer analysis. Dynamic simulation model check valve piston; Analisis del golpe de airete. Modelo de simulacion dinamica de valvula de retencion piston

    Energy Technology Data Exchange (ETDEWEB)

    Royo, B.; Valdes, R.

    2012-11-01

    This report contains the description and the results of the dynamic simulation model that has been developed to predict the behaviour of one of our lift check valve design. The aim of the model is not only to simulate the closing process of the valve and to product the magnitude of the water hammer effect that may appear immediately after the valve closing, but also to simulate several design version until obtain the optimum which further minimizes such effect. the input data used for this study ensure reliable results since they represent a real system. (Author)

  15. Drilling, Coring and Sampling Using Piezoelectric Actuated Mechanisms: From the USDC to a Piezo-Rotary-Hammer Drill

    Science.gov (United States)

    Bar-Cohen, Yoseph; Sherrit, Stewart; Badescu, Mircea; Bao, Xiaoqi

    2012-01-01

    NASA exploration missions are increasingly including sampling tasks but with the growth in engineering experience (particularly, Phoenix Scout and MSL) it is now very much recognized that planetary drilling poses many challenges. The difficulties grow significantly with the hardness of sampled material, the depth of drilling and the harshness of the environmental conditions. To address the requirements for samplers that could be operated at the conditions of the various bodies in the solar system, a number of piezoelectric actuated drills and corers were developed by the Advanced Technologies Group of JPL. The basic configuration that was conceived in 1998 is known as the Ultrasonic/Sonic Driller/Corer (USDC), and it operates as a percussive mechanism. This drill requires as low preload as 10N (important for operation at low gravity) allowing to operate with as low-mass device as 400g, use an average power as low as 2- 3W and drill rocks as hard as basalt. A key feature of this drilling mechanism is the use of a free-mass to convert the ultrasonic vibrations generated by piezoelectric stack to sonic impacts on the bit. Using the versatile capabilities f the USDC led to the development of many configurations and device sizes. Significant improvement of the penetration rate was achieved by augmenting the hammering action by rotation and use of a fluted bit to remove cuttings. To reach meters deep in ice a wireline drill was developed called the Ultrasonic/Sonic Gopher and it was demonstrated in 2005 to penetrate about 2-m deep at Antarctica. Jointly with Honeybee Robotics, this mechanism is currently being modified to incorporate rotation and inchworm operation forming Auto-Gopher to reach meters deep in rocks. To take advantage of the ability of piezoelectric actuators to operate over a wide temperatures range, piezoelectric actuated drills were developed and demonstrated to operate at as cold as -200oC and as hot as 500oC. In this paper, the developed mechanisms

  16. Der hadronen-hammer

    CERN Multimedia

    2006-01-01

    The depthes of the cosmos and the world of the elementary particles contain the biggest enigmae of the modern physics. With a superstrong particle accelerator the physicists want to break the hardest cores. (2,5 pages)

  17. Hammering kids for Christ

    National Research Council Canada - National Science Library

    Greg Ruehlmann

    2008-01-01

    ..., hats and snow boots. The younger kids are shepherded to an adjacent playroom; the rest linger and chatter until a pastor, who oversees the weekly, nondenominational outreach program, leads them in some opening music...

  18. Consideration of geomorphological uncertainties with terrestrial cosmogenic nuclide dating (TCND): combining Schmidt-hammer and 10Be dating, Southern Alps, New Zealand

    Science.gov (United States)

    Winkler, Stefan

    2010-05-01

    "by vision". Especially in regions like the Southern Alps affected of considerable neo-tectonic activity and paraglacial erosion, post-depositional movement of any boulders on moraine ridges cannot be excluded a priori. On base on these considerations, an attempt to combine TCND with Schmidt-hammer measurements for the dating of Holocene moraines and the reconstruction of a regional glacier chronology has been developed (Winkler 2009). Cosmogenic 10Be dating delivers ‘absolute' ages for the exposure of boulder surfaces, i.e. the same surface tested with the Schmidt-hammer relative-age dating technique. Therefore, Schmidt-hammer measurements can successfully endorse the selection of representative boulders for TCND and effectively avoid sampling boulders that have been exposed to post-depositional movement (e.g. rotation). Additionally, the number of boulders sampled for TCND can be reduced, positive in the light of economic and conservational considerations. Results from the application of this combined ‘multi-proxy-approach' at a number of individual glaciers in Westland/Tai Poutini and Mt Cook/Aoraki National Parks of the Southern Alps proof its potential. At least three ‘Little Ice Age'-type events culminating around 2,300, 1,600, and 1,000 years ago and predating the "Little Ice Age" have been confirmed. The construction of a dating curve based on both Schmidt-hammer and cosmogenic (10Be) dating results shows high significance and demonstrates the high potential of this attempt. References: Schaefer, J.M., Denton, G.H., Kaplan, M., Putnam, A., Finkel, R.C., Barrell, D.J.A., Andersen, B.G., Schwartz, R., McIntosh, A., Chinn, T. & Schlüchter, C. (2009): High-frequency Holocene glacier fluctuations in New Zealand differ from the northern signature. Science 324, 622 - 625. Winkler, S. (2009): First attempt to combine terrestrial cosmogenic nuclide (10Be) and Schmidt hammer relative-age dating: Strauchon Glacier, Southern Alps, New Zealand. Central European

  19. Diseño y desarrollo de una experiencia que evidencie el fenómeno de la celda Hele-Shaw por medio de fluidos de viscosidades y colores diferentes, para la sala Física Viva del Parque Explora

    OpenAIRE

    González Múnera, Roxana; Lineros Candamil, Andrea

    2008-01-01

    A lo largo de este trabajo se diseño y desarrollo una experiencia interactiva que muestra la teoría de los fractales utilizando como base formas que resultaban de la repetición de lo micro a lo macro y también la teoría de la celda Hele-Shaw. El primer concepto se evidencia en el aspecto formal de la experiencia y el segundo en su funcionamiento.

  20. Hypothenar hammer syndrome: case report and literature review Síndrome do martelo hipotenar: relato de caso e revisão da literatura

    Directory of Open Access Journals (Sweden)

    Márcia Maria Muniz de Queiroz

    2013-01-01

    Full Text Available Case report of a 69 year-old patient, with history of repetitive trauma events in the wrist, clinically simulating tenosynovitis, being held with Doppler Ultrasound and Magnetic Nuclear Resonance, which showed ulnar artery thrombosis. The accurate diagnosis of the hammer hypothenar disease through those tests enable an early intervention, improving the prognosis of patients affected by this rare disease.Paciente de 69 anos, com história de traumas repetitivos no punho, simulando clinicamente tenossinovite, sendo feitas ultrassonografia com doppler e ressonância nuclear magnética, que evidenciaram trombose da artéria ulnar. O diagnóstico preciso da doença do martelo hipotenar por meio desses exames possibilita uma intervenção precoce e melhora o prognóstico dos pacientes acometidos por essa rara afecção.

  1. Briti sideluure Eesti kommunistide vastu / Ivo Juurvee

    Index Scriptorium Estoniae

    Juurvee, Ivo, 1979-

    2011-01-01

    Suurbritannia arendas esimesena (1943.a.) välja globaalse haardega sideluure British SIGINT (signal intelligence). Alates 2005. aastast on Briti Rahvusarhiivis uurijatele kättesaadavaks tehtud märkimisväärne hulk sideluure dokumente, mille mahust suurema osa moodustavad sõdadevahelisel perioodil dekrüpteeritud telegrammid. Eesti kommunistide teated ei olnud Briti krüptoloogidele prioriteediks, kuid kuna Kopengaagenis tegutsedes kasutasid eestlased Kominterni koodi, siis murti töö käigus jooksvalt lahti ka nende telegrammid.

  2. Ladina keele õpikud ja sententsikogumikud / Ivo Volt

    Index Scriptorium Estoniae

    Volt, Ivo, 1975-

    2000-01-01

    Ka sententsikogumikest: V. Hromov. Dicta et proverbia Latina. Tallinn : Perioodika, 1997 ; 1001 ladina sententsi eesti vastetega. Tallinn : Valgus, 1997 ; K. Türk. Lendsõnade leksikon. Tallinn : Avita, 1998

  3. Use of {sup 10}Be exposure ages and Schmidt hammer data for correlation of moraines in the Krkonose Mountains, Poland/Czech Republic

    Energy Technology Data Exchange (ETDEWEB)

    Engel, Zbynek; Krizek, Marek [Charles Univ., Prague (Czech Republic). Dept. of Physical Geography and Geoecology; Traczyk, Andrzej [Wroclaw Univ. (Poland). Dept. of Geomorphology; Braucher, Regis [CEREGE, Aix-en-Provence (France); Woronko, Barbara [Warsaw Univ. (Poland). Dept. of Geography and Regional Development

    2011-06-15

    Exposure ages and relative-age data are presented from eight sites in the Lomnica and Lomniczka valleys to provide essential information for reconstructing local glaciation chronology. A combination of {sup 10}Be exposure ages and Schmidt hammer data obtained for moraines indicate relatively short period of glacier accumulation lasting from 17.0{+-}0.4 ka to 13.6{+-}0.9 ka. Exposure age of 8.4{+-}0.3 ka measured on the lowermost section of the Lomnica cirque headwall further confirms the view of glacier preservation in favourable sites until the beginning of the Holocene. A comparison of the obtained chronological data with timing of mountain glaciation in the nearby Upa Valley is used to propose the first correlative model of Late Quaternary glaciation in the eastern part of the Krkonose Mountains. The correlation implies that the lowermost preserved moraines originated during the local maximum of the last glaciation whereas recessional moraines were deposited until the Lateglacial period. A subsequent melting of glaciers terminated at the beginning of the Holocene. The implications of the model are discussed and further investigations are suggested to extend its validity to the whole mountain area. (orig.)

  4. Assessing the underwater acoustics of the world's largest vibration hammer (OCTA-KONG) and its potential effects on the Indo-Pacific humpbacked dolphin (Sousa chinensis).

    Science.gov (United States)

    Wang, Zhitao; Wu, Yuping; Duan, Guoqin; Cao, Hanjiang; Liu, Jianchang; Wang, Kexiong; Wang, Ding

    2014-01-01

    Anthropogenic noise in aquatic environments is a worldwide concern due to its potential adverse effects on the environment and aquatic life. The Hongkong-Zhuhai-Macao Bridge is currently under construction in the Pearl River Estuary, a hot spot for the Indo-Pacific humpbacked dolphin (Sousa chinensis) in China. The OCTA-KONG, the world's largest vibration hammer, is being used during this construction project to drive or extract steel shell piles 22 m in diameter. This activity poses a substantial threat to marine mammals, and an environmental assessment is critically needed. The underwater acoustic properties of the OCTA-KONG were analyzed, and the potential impacts of the underwater acoustic energy on Sousa, including auditory masking and physiological impacts, were assessed. The fundamental frequency of the OCTA-KONG vibration ranged from 15 Hz to 16 Hz, and the noise increments were below 20 kHz, with a dominant frequency and energy below 10 kHz. The resulting sounds are most likely detectable by Sousa over distances of up to 3.5 km from the source. Although Sousa clicks do not appear to be adversely affected, Sousa whistles are susceptible to auditory masking, which may negatively impact this species' social life. Therefore, a safety zone with a radius of 500 m is proposed. Although the zero-to-peak source level (SL) of the OCTA-KONG was lower than the physiological damage level, the maximum root-mean-square SL exceeded the cetacean safety exposure level on several occasions. Moreover, the majority of the unweighted cumulative source sound exposure levels (SSELs) and the cetacean auditory weighted cumulative SSELs exceeded the acoustic threshold levels for the onset of temporary threshold shift, a type of potentially recoverable auditory damage resulting from prolonged sound exposure. These findings may aid in the identification and design of appropriate mitigation methods, such as the use of air bubble curtains, "soft start" and "power down" techniques.

  5. Reducing silica and dust exposures in construction during use of powered concrete-cutting hand tools: efficacy of local exhaust ventilation on hammer drills.

    Science.gov (United States)

    Shepherd, S; Woskie, S R; Holcroft, C; Ellenbecker, M

    2009-01-01

    Concrete cutting in construction is a major source of exposure to respirable crystalline silica. To reduce exposures, local exhaust ventilation (LEV) may be integrated into the hand tools used in concrete cutting. Volunteers from the New England Laborers Training Center participated in a field study focused on the use of LEV on concrete-cutting hammer drills. A randomized block design field experiment employing four workers measured the efficacy of four hood-vacuum source combinations compared with no LEV in reducing dust and silica exposures. Using four-stage personal cascade impactors (Marple 294) to measure dust exposure, a total of 18 personal samples were collected. Reductions of over 80% in all three biologically relevant size fractions of dust (inhalable, thoracic, and respirable) were obtained by using any combination of hood and vacuum source. This study found that respirable dust concentrations were reduced from 3.77 mg/m(3) to a range of 0.242 to 0.370 mg/m(3); thoracic dust concentrations from 12.5 mg/m(3) to a range of 0.774 to 1.23 mg/m(3); and inhalable dust concentration from 47.2 mg/m(3) to a range of 2.13 to 6.09 mg/m(3). Silica concentrations were reduced from 0.308 mg/m(3) to a range of 0.006 to 0.028 mg/m(3) in the respirable size fraction, from 0.821 mg/m(3) to a range of 0.043 to 0.090 mg/m(3) in the thoracic size fraction, and from 2.71 mg/m(3) to a range of 0.124 to 0.403 mg/m(3) in the inhalable size fraction. Reductions in dust concentrations while using the four LEV systems were not statistically significantly different from each other.

  6. Assessing the underwater acoustics of the world's largest vibration hammer (OCTA-KONG and its potential effects on the Indo-Pacific humpbacked dolphin (Sousa chinensis.

    Directory of Open Access Journals (Sweden)

    Zhitao Wang

    Full Text Available Anthropogenic noise in aquatic environments is a worldwide concern due to its potential adverse effects on the environment and aquatic life. The Hongkong-Zhuhai-Macao Bridge is currently under construction in the Pearl River Estuary, a hot spot for the Indo-Pacific humpbacked dolphin (Sousa chinensis in China. The OCTA-KONG, the world's largest vibration hammer, is being used during this construction project to drive or extract steel shell piles 22 m in diameter. This activity poses a substantial threat to marine mammals, and an environmental assessment is critically needed. The underwater acoustic properties of the OCTA-KONG were analyzed, and the potential impacts of the underwater acoustic energy on Sousa, including auditory masking and physiological impacts, were assessed. The fundamental frequency of the OCTA-KONG vibration ranged from 15 Hz to 16 Hz, and the noise increments were below 20 kHz, with a dominant frequency and energy below 10 kHz. The resulting sounds are most likely detectable by Sousa over distances of up to 3.5 km from the source. Although Sousa clicks do not appear to be adversely affected, Sousa whistles are susceptible to auditory masking, which may negatively impact this species' social life. Therefore, a safety zone with a radius of 500 m is proposed. Although the zero-to-peak source level (SL of the OCTA-KONG was lower than the physiological damage level, the maximum root-mean-square SL exceeded the cetacean safety exposure level on several occasions. Moreover, the majority of the unweighted cumulative source sound exposure levels (SSELs and the cetacean auditory weighted cumulative SSELs exceeded the acoustic threshold levels for the onset of temporary threshold shift, a type of potentially recoverable auditory damage resulting from prolonged sound exposure. These findings may aid in the identification and design of appropriate mitigation methods, such as the use of air bubble curtains, "soft start" and "power down

  7. Assessing the Underwater Acoustics of the World's Largest Vibration Hammer (OCTA-KONG) and Its Potential Effects on the Indo-Pacific Humpbacked Dolphin (Sousa chinensis)

    Science.gov (United States)

    Wang, Zhitao; Wu, Yuping; Duan, Guoqin; Cao, Hanjiang; Liu, Jianchang; Wang, Kexiong; Wang, Ding

    2014-01-01

    Anthropogenic noise in aquatic environments is a worldwide concern due to its potential adverse effects on the environment and aquatic life. The Hongkong-Zhuhai-Macao Bridge is currently under construction in the Pearl River Estuary, a hot spot for the Indo-Pacific humpbacked dolphin (Sousa chinensis) in China. The OCTA-KONG, the world's largest vibration hammer, is being used during this construction project to drive or extract steel shell piles 22 m in diameter. This activity poses a substantial threat to marine mammals, and an environmental assessment is critically needed. The underwater acoustic properties of the OCTA-KONG were analyzed, and the potential impacts of the underwater acoustic energy on Sousa, including auditory masking and physiological impacts, were assessed. The fundamental frequency of the OCTA-KONG vibration ranged from 15 Hz to 16 Hz, and the noise increments were below 20 kHz, with a dominant frequency and energy below 10 kHz. The resulting sounds are most likely detectable by Sousa over distances of up to 3.5 km from the source. Although Sousa clicks do not appear to be adversely affected, Sousa whistles are susceptible to auditory masking, which may negatively impact this species' social life. Therefore, a safety zone with a radius of 500 m is proposed. Although the zero-to-peak source level (SL) of the OCTA-KONG was lower than the physiological damage level, the maximum root-mean-square SL exceeded the cetacean safety exposure level on several occasions. Moreover, the majority of the unweighted cumulative source sound exposure levels (SSELs) and the cetacean auditory weighted cumulative SSELs exceeded the acoustic threshold levels for the onset of temporary threshold shift, a type of potentially recoverable auditory damage resulting from prolonged sound exposure. These findings may aid in the identification and design of appropriate mitigation methods, such as the use of air bubble curtains, “soft start” and “power down

  8. Combination of in situ cosmogenic nuclide (10Be) and Schmidt-hammer dating for the investigation of Late-Holocene lateral moraines in the Southern Alps of New Zealand

    Science.gov (United States)

    Winkler, S.

    2009-04-01

    The investigation of Holocene glacier chronologies in high mountain regions is important for use of glaciers as indicators for climate change. Only detailed Holocene glacier chronologies offer the opportunity to improve our knowledge on the relationship between glaciers and climate factors, and to verify models of the future glacier development. The Southern Alps of New Zealand represent the southern hemispheric study area within the complex comparative current research project "MaMoGla" (Holocene and recent dynamics of maritime mountain glaciers). Among other goals, new methodological attempts to date the dominating lateral moraines in the Southern Alps in order to revise existing glaciers chronologies have been integrated in this project. The need for improvement of the existing Holocene glacier chronology of the Southern Alps/New Zealand is mainly caused by methodological uncertainties and the focus on Tasman Glaciers as unreliable key locality. Previously, radiocarbon (14C) dating of organic material (plant remains, organic-rich soil layers etc.) buried beneath or within the complex lateral moraines was the predominating ‘absolute' dating technique applied. In addition to older studies using the measurement of weathering rind thickness on boulders, the potential of the Schmidt-hammer as relative-age dating technique has clearly been demonstrated by the successful application on several lateral and latero-frontal moraine sequences in the Mt Cook/Aoraki National Park. The relatively homogenous and weathering/erosion-resistant bedrock yielded comparatively small standard errors and, thus, a relatively high time resolution of up to 200 - 300 years. Supported by statistical treatment of the raw field data, the Schmidt-hammer provided sufficient information to group the individual moraine ridges into moraine sequences and relate them to separate Little Ice Age-type events. However, the final ‘absolute' age dating of the moraine sequences remained open. As an

  9. Elamise hele kergus / Ingrid Sembach-Sakias

    Index Scriptorium Estoniae

    Sembach-Sakias, Ingrid

    2004-01-01

    Klaasist eramu Silgu tänaval Tallinnas. Laed ja põrandad, v. a. magamistoad, on betoonist. Arhitektid Ülar Mark ja Indrek Tiigi, AB Urban Mark. Sisekujundaja Raina Lillepõld. Köögi- ja elutoamööbli kavandas perenaine. Elamispind 174, 9 mø. Ill.: korruse plaan, 4 välis- ja 8 sisevaadet, värv. Kommentaar Ülar Margilt

  10. Hele Jugoslavien danser rock 'n' roll

    DEFF Research Database (Denmark)

    Jovanovic, Zlatko

    2010-01-01

    Indtil for nylig har forskningen inden for jugoslavisk populærmusik og populærkultur været ret marginal. Litteraturen, der omhandler identitetsformation, har næsten udelukkende beskæftiget sig med politik, religion og etnicitet, alt imens populærkulturen pga. sin underholdningskarakter er blevet ...

  11. Behandling af historiske data for hele Limfjorden

    DEFF Research Database (Denmark)

    2008-01-01

    prøvetagningsprogram, som strakte sig over 26 uger i perioden april til september 2008 i produktionsområderne 9 og 18/19. I hvert område blev der på ugebasis udtaget prøver til undersøgelse for forekomst af potentielt giftige alger i vandet, algetoksiner i muslingerne, visse bakterier i muslingerne og virus i...

  12. Send hele det "fejlslagne" Skat i udlicitering

    DEFF Research Database (Denmark)

    Andersen, Kim Normann

    2017-01-01

    En pendant til udbetaling Danmark er løsningen på Skats problemer med at få pengene indbetalt. ... Det vil løsne de snævre bånd som de offentlige myndigheder har, når de skal købe digitale løsninger. De private kan vælge bedst og billigst med langt kortere tidshorisont og uden at gamble med...

  13. Samuelsen jagter nye venner over hele Europa

    DEFF Research Database (Denmark)

    Adler-Nissen, Rebecca

    2017-01-01

    Professor ved Center for Europæisk Politik Rebecca Adler-Nissen var lørdag den 8. April interviewet til Politiken. Professoren blev interviewet i forbindelse med den danske udenrigsminister Anders Samuelsens diplomatiske mission i jagten på nye allierede i EU-regi efter Brexit.......Professor ved Center for Europæisk Politik Rebecca Adler-Nissen var lørdag den 8. April interviewet til Politiken. Professoren blev interviewet i forbindelse med den danske udenrigsminister Anders Samuelsens diplomatiske mission i jagten på nye allierede i EU-regi efter Brexit....

  14. Et sammenhængende hele

    DEFF Research Database (Denmark)

    Kristensen, Peter Thule

    2017-01-01

    Den danske historicistiske arkitekt Gottlieb Bindesbøll tegnede i midten af det 19. århundrede tre sindssygehospitaler, som vidner om en tro på arkitekturens helbredende virkning. De er tillige udtryk for en romantisk verdensopfattelse, der kan have præget velfærdssamfundet mere end hidtil...

  15. Experiencias para el incremento de la vida útil de los martillos de los desmeduladores de bagazo de caña. // Experiences for the increment of useful life of hammers for cane trash depither.

    Directory of Open Access Journals (Sweden)

    F. Diez Torres

    2004-05-01

    Full Text Available El presente trabajo describe las experiencias llevadas a cabo por la División de Desarrollo del ICIDCA (Instituto Cubano deInvestigaciones de los Derivados de la caña de Azúcar, con el objetivo de incrementar la vida útil de los martillos de losdesmeduladores de bagazo, cuyo desgaste afecta la eficiencia en separación de médula de dichos equipos, utilizando elmétodo de recargue duro por soldadura por arco eléctrico. Se explican además los mecanismos de desgaste que tienenlugar, los métodos utilizados para la evaluación del desgaste en los recubrimientos ensayados, los resultados obtenidos y sebrindan soluciones concretas para atenuar éste fenómeno.Palabras claves: Desgaste, recuperación, industria azucarera, soldadura._______________________________________________________________________________Abstract.This paper describes the experiences obtained in the Development Division of ICIDCA ( Cuban Research Institute forSugar Cane Derivatives, to increase the useful life of bagasse depither hammers using arc welding hard surfacing method.The wear of these hammers affects the efficiency directly in the pith separation in these equipment. Besides, we explain thewear mechanisms which take place, the methods used to evaluate the wear in the tested coatings and the obtained results.Concrete solutions to diminish this phenomenon are given.Key words: Wear, recovery, sugar industry, welding.

  16. Proposición de dos aleaciones fundidas para su estudio en la construcción de martillos de molinos desmeduladores de bagazo. // Proposition of two casted alloys for their study in the construction of bagasse crush mills hammers.

    Directory of Open Access Journals (Sweden)

    F. Diez Torres

    2005-05-01

    Full Text Available El presente trabajo constituye un análisis teórico que tiene como objetivo la determinación de cuáles serían las aleaciones autilizar y la tecnología de colada adecuada para la fabricación de los martillos de los desmeduladores de bagazo a partir dealeaciones fundidas resistentes al desgaste.Se analizan los resultados de las experiencias realizadas con recubrimientos por soldadura de recargue duro, con los cualesse corroboraron las hipótesis sobre los mecanismos de desgaste ocurrentes y las estructuras metalográficas adecuadas paracada perfil del martillo.Se propone la realización de ensayos de campo con martillos construidos con hierros al cromo debido a que se caracterizanpor poseer carburos de cromo con la posibilidad de obtener diferentes contenidos y distribución de los mismos en matricesque van desde la austenítica a martensítica. Se propone realizar los ensayos con las aleaciones 15-3 y 20-3 con y sintratamiento térmico y con colada en coquilla, con diferentes velocidades de enfriamiento en cada perfil de trabajo con el finde obtener la estructura metalográfica adecuada.Palabras claves: Aleaciones, martillos desmenuzadores de bagazo, recubrimiento por soldadura.____________________________________________________________________________Abstract.The present paper constitutes a theoretical analysis for the determination of an appropriate cast technology determinationfor the production of bagasse crush hammers with wear cast iron alloys.The results of welding hard facing coatings with the wear mechanisms hypothesis and appropriate metallographic structureswere corroborated.Field tests with chromium cast iron hammers are proposed due that this alloys is characterized to posses chromiumcarbides, with the possibility to obtain different contents and distribution in austenitic, martensitic or intermediate metalmatrices. Tests with 15-3 and 20-3 alloys with or without thermal treatment and metal mold casting with different

  17. Bagatellid : Maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2010-01-01

    Muusikasõnumeid maailmast: ECHO Klassik aasta dirigent on Paavo Järvi. Lahkus tunnustatud dirigent Charles Mackerras (1925-2010).Kristjan Järvi sõlmis lepingu plaadifirmaga Sony Classical. Kuninganna Elisabethi konkursi võitis pianist Denis Kozhukhin. Suri pianist Yvonne Loriod (1924-2010). Mary J. Blige kehastab filmis Nina Simone'i. Suri Hank Jones. Dee Dee Bridgewater tähistab juubelit erilise albumiga. Prince plaanib korraldada jazzifestivali

  18. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: 14. Tšaikovski nimelisest konkursist. Daniel Barenboim tõstetakse rüütliseisusesse. Orkestrist I, Culture Orchestra. Charles Dutoit plaanib luua Lõuna- ja Põhja-Koread ühendava orkestri. Lahkus Josef Suk. Seiji Ozawa pälvis Praemium Imperiale auhinna. Cardiffi lauljate konkursi võitis Valentina Nafornita. Lahkus Nikolai Petrov. Venetsueelas lööb laineid noor dirigent Jose Omar Davila. "Jazzkaare" täht Brass Jaw sai Suurbritannias suure tunnustuse osaliseks. Põhjamaade Nõukogu muusikaauhinna teenis Mats Gustafsson. Black Eyed Peas paneb pillid kotti. Kuuba kitarrist Manuel Galban surnud. Eesti on Tšehhi jazziraadio fookuses

  19. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: Hollandi kultuurielu kriis. Toetus Londoni Filharmooniaorkestrist vallandatud muusikutele. Veebilehest: arkivmusic.eu. Lahkus Kurt Sanderling. Hiinas keelustati ajaloolise sisuga ooper. Dirigent Mark Gorenstein vallandati ametist. Beethoveni kvarteti taastatud osa. Värskeid plaadilepinguid. Bostoni sümfooniaorkester otsib muusikalist juhti. Fabio Luisil probleem kodumaiste ooperimajadega. Itaalia jazzi pevad New Yorgis. Värskeid plaate jazzimaailmast. Tony Bennett purustas rekordi. DownBeati aasta jazzmuusik on Jason Moran

  20. Jedovatí živočichové

    OpenAIRE

    Jiskrová, Martina

    2011-01-01

    Toxic Animals The thesis deals with the toxicology of poisonous animals. I did the survey, which focuses mainly on their brief description, occurrence, how they utilise their toxicity and whether they are dangerous to humans. In case of poisoning or even causing death in human, there are reported particular symptoms and possible therapy for each group of these poisonous animals.

  1. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: Arvo Pärt võitis aasta helilooja tiitli. Kronos Quartetile Avery Fischer Prize ja Polar Music Prize. Kristjan Järvi saab Kesk-Saksamaa Ringhäälingu (Mitteldeutsche Rundfunk) sümfooniaorkestri peadirigendiks. Brasiilia sümfooniaorkestrist vallandati pooled muusikud. Riccardo Muti hooaja preemiad. Grammy auhindade kategooriaid plaanitakse vähendada. Suri Sony kompanii kauaaegne juht Norio Ohga. Valeri Gergijevi edu BBC Music Magazine'i auhindade galal. Plaat Smolenski tragöödiate ohvrite mälestuseks. Norralased viivad hea muusika kontoritesse

  2. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: Jiri Belohlavek naaseb Tšehhi filharmoonia peadirigendiks. Alfred Brendel 80. Sir Simon Rattle'i debüüt Metropolitan Operas. Soome raadio sümfooniaorkestri peadirigendiks saabHannu Lintu. 2012. aasta Viini uusaastakontserti juhatab Maris Jansons. Uus täht jazzitaevas - Christian Scott. Valik uusi jazziraamatuid. Itaalia muusikaajakiri Musica Jazz valis aasta parimaid jazzmuusikuid. Grammy võitjad selgunud. Michael Jackson jätkab postuumselt müügirekordite purustamist

  3. Does Estonia need an individual complaint? / Ivo Pilving

    Index Scriptorium Estoniae

    Pilving, Ivo, 1975-

    2017-01-01

    Küsimusest kas Eesti vajab iseseisvat konstitutsioonikohut või Riigikohtus toimuva põhiseaduslikkuse järelevalve laiendamist uute kaebevõimalustega, eriti individuaalkaebusega. Individuaalkaebuse olemusest ja praktikast

  4. Bagatellid : Maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: Riccardo Muti pälvis Birgit Nilssoni preemia. BBC Music Magazine korraldatud küsitluse tulemusel on maailma silmapaistvam dirigent Carlos Kleiber. Sony ja Decca Classicsi värsked plaadilepingud. Suri dirigent Yakov Kreizberg. Paavo Järvi pikendas lepingut Orchestre de Paris'ga aastani 2016. Anu Tali debüteeris New Yorgi Lincoln Center's. Uut ECM kataloogis. Carla Bruni võitleb internetipiraatluse vastu. Ungari jazzipäevadel jagati tunnustust

  5. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: Grammy nominentide seas Arvo Pärt, Eesti Riiklik Sümfooniaorkester ja Eesti Filharmoonia Kammerkoor. Louis Andriessen võitis Grawemeyeri preemia. Sibeliuse-nimelise viiuldajate konkursi võitis Nikita Borisoglebski. Kristiina Poska jõudis Donatella Flicki nimelise dirigentide konkursi finaali. Benjamin Koppel pälvis jazziauhinna Ben Webster Prize. Newporti jazzifestival jäi sponsorita. Down Beati jazzikriitikud valisid 2010. aasta parimad (nimekiri)

  6. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2010-01-01

    Sõnumeid muusikamaailmast: Neeme Järvist saab Orchestre de la Suisse Romande kunstiline ja muusikaline juht. Selgusid ajakirja Gramophone auhinnad. Lahkus koloratuursopran Joan Sutherland. Šotimaal avastati Antonio Vivaldi kodunud kontsert. Arvatavalt Napoleonile kuulunud Stradivari viiul müüdi internetioksjonil kõrge hinnaga. Dave Holland teeb flamenkot. Panama kultuurisaadik Danilo Perez sai auhinna. Jazzmuusik kaebas Snoop Doggi kohtusse

  7. Eesti vetest leiti 26 lõhkekeha / Ivo Hunt

    Index Scriptorium Estoniae

    Hunt, Ivo

    2003-01-01

    Eesti vetes läbiviidud rahvusvahelisest miinitõrjeoperatsioon-õppusest Open Sprit 2003. VIP-päeva raames külastasid õppust Eesti Vabariigi peaminister Juhan Parts, Kaitseväe juhataja Tarmo Kõuts ja Mereväe ülem Jaan Kapp

  8. Riigikogu töö kajastus Eesti meedias / Ivo Rull

    Index Scriptorium Estoniae

    Rull, Ivo, 1965-

    2002-01-01

    Riigikogu Kantselei tellimusel analüüsis suhtekorraldusfirma Rull & Rumm Eesti online- ja trükimeedia kajastuste põhjal Riigikogu avalikku reputatsiooni 2001. aastal. Autor vahendab analüüsi tulemusi. Tabelid: meediamonitooringu tulemused; meediakajastuste jaotus valdkonniti

  9. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: Helsingis avati uus kultuurikeskus Helsingi Musiikkitalo. Montrealis sain endale uue kontserdimaja La Maison Symphonique de Montreal. Lahkus tenor Salvatore Licitra. James Levine loobus Metropolitan Opera sügishooaja etenduste dirigeerimisest. Iisraeli Filharmoonikute kontsert BBC Promsil häiritud. Deutsche Grammophon kolis Berliini. Siemens loobub Bayereuthi festivali spondeerimisest. Kultuurivahetus Viini Riigiooperi ja La Scala ooperiteatrite vahel. MTV premeeris popimaailma tippe. Hiina tsenseerib Lääne popmuusikuid. uus Grammyde jagamise kord põhjustab pahameelt. Return to Forever taas koos. Chick Corea juubel

  10. Väikekliendid on siiski olulised / Ivo Remmelg

    Index Scriptorium Estoniae

    Remmelg, Ivo

    2005-01-01

    Kliendisuhete haldamissüsteemi tarkvara hankimisele AS-is Telegrupp eelnes veebipõhise küsitlusuuringu läbiviimine klientide üldise rahulolu ja informeerituse taseme kindlakstegemiseks ning raamatupidamisandmete analüüs. Uurimistöö tulemustest. Lisad: AS Telegrupp; Mis on CRM?

  11. Bagatellid : maailm / Nele-Eva Steinfeld, Harry Liivrand, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2010-01-01

    Uudiseid maailmast: Helilooja Jennifer Higdon pälvis Pulitzeri preemia. Fabio Luisist sai Metropolitan Opera esimene külalisdirigent. "Operalia" võitjad Sonya Yoncheva ja Stefan Pop. Lahkus metsosopran Giulietta Simionato. Kaija Saariaho uus ooper "Emilie" Amsterdamis. Hollandi maineka jazziauhinna noppis Anton Goudsmit. Herbie Hancock tähisats juubelit. Jagati reggae- ja maailmamuusika auhindu. Ilmus Stevie Wonderi biograafia

  12. Bagatellid : Maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2010-01-01

    Muusikasõnumeid maailmast: Eesti Filharmoonia Kammerkoori plaat "Kolgata" on Gramophone Awardi nominent. Arvo Pärdi teoseid esitati Walesis Vale of Glamorgani festivalil. Chicagos on müügil maailma kalleim viiul. James Levine'i seni avaldamata ooperisalvestused nüüd saadaval. John Zornil üliproduktiivne aasta. Björk pälvis väärika auhinna. Al Jarreau jättis tuuri pooleli. Ilmus Miles Davise kaheksa kogumikku 43 CD-ga

  13. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2010-01-01

    Lühisõnumaid maailmast: Vene pianist Julianna Avdejeva saavutas XVI rahvusvahelisel Chopini konkursil Varssavis võidu. Suri poola helilooja Henryk Mikolaj Gorecki. Daniel Barenboimi 60 lava-aastat. Suri dirigent ja vioolamängija Rudolf Baršai. Kitarrilegend Sonny Sharrock sai oma kodulinnas enda nimelise tänava. 23. Thelonious Monki nimelise jazzkonkursi võitis Cecile McLorin Salvant. Youn Sun Nah Prantsuse müügiedetabeli tipus. Ansamblil Jamiroquai ilmus uus plaat. Suri saksofonist Marion Brown

  14. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: Pianist Ingolf Wunderil plaadileping Deutsche Grammophoniga. Dmitri Hvorostovski ja Ivari Ilja Ameerika lavadel. Olari Elts Helsingi Linnaorkestri pea-külalisdirigendiks. John Storgards BBC Filharmooniaorkestri pea-külalisdirigendiks. James Levine loobub Bostoni sümfooniaorkestri kunstilise juhi ametist. Sopran Arete Teemets võitis Spoletos toimunud konkursil kolmanda koha. Pianist Mihkel Poll võitis Londonis Yamaha konkursil. Björki ja Omar Souleymani koostööst. Hamburgi jazziauhind Vladyslav Sendeckile. Joe Lovano kakskümmend aastat Blue Note'i artist. Suri Tony Levin. Nelly Furtado annetab Gadaffilt saadud raha

  15. Bagatellid : maailm / Nele-Eva Steinfeld, Ivo Heinloo

    Index Scriptorium Estoniae

    Steinfeld, Nele-Eva

    2011-01-01

    Muusikasõnumeid maailmast: Grammy 2011 võitjad selgunud. Saksa helilooja Aribert Reimann pälvis Ernst von Siemensi preemia. Andras Schiff ja Adam Fischer mures Ungari pärast. Lahkus sopran Margaret Price. Suri Charles Fambrough. Kevadisi jazzifestivale Euroopas. Üks maailma vanimaid jazziklubisid Bakers's Keyboard Lounge haamri all

  16. Condensation induced water hammer driven sterilization

    Science.gov (United States)

    Kullberg, Craig M.

    2004-05-11

    A method and apparatus (10) for treating a fluid or materials therein with acoustic energy has a vessel (14) for receiving the fluid with inner walls shaped to focus acoustic energy to a target zone within the vessel. One or more nozzles (26) are directed into the vessel (14) for injecting a condensable vapor, such as steam, into the vessel (14). The system may include a steam source (18) for providing steam as the condensable vapor from an industrial waste heat source. Steam drums (88) are disposed between the steam source (18) and nozzles (26) to equalize and distribute the vapor pressure. A cooling source (30) provides a secondary fluid for maintaining the liquid in the vessel (14) in subcooled conditions. A heating jacket (32) surrounds the vessel (14) to heat the walls of the vessel (14) and prevent biological growth thereon. A pressurizer (33) may operate the system at elevated pressures.

  17. Computational compliance criteria in water hammer modelling

    Science.gov (United States)

    Urbanowicz, Kamil

    2017-10-01

    Among many numerical methods (finite: difference, element, volume etc.) used to solve the system of partial differential equations describing unsteady pipe flow, the method of characteristics (MOC) is most appreciated. With its help, it is possible to examine the effect of numerical discretisation carried over the pipe length. It was noticed, based on the tests performed in this study, that convergence of the calculation results occurred on a rectangular grid with the division of each pipe of the analysed system into at least 10 elements. Therefore, it is advisable to introduce computational compliance criteria (CCC), which will be responsible for optimal discretisation of the examined system. The results of this study, based on the assumption of various values of the Courant-Friedrichs-Levy (CFL) number, indicate also that the CFL number should be equal to one for optimum computational results. Application of the CCC criterion to own written and commercial computer programmes based on the method of characteristics will guarantee fast simulations and the necessary computational coherence.

  18. Water Hammer in Pumped Sewer Mains

    DEFF Research Database (Denmark)

    Larsen, Torben

    This publication is intended for students and engineers seeking an introduction to the problem of water transients in pumped sewer and water mains. This is a subject of increasing interest because of the development of larger and more integrated systems. Consideration of transients is essential...... for the structural design of pipelines and for the planning of the proper function of the systems. The text is written by Torben Larsen, who is a professor of environmental hydraulics at the Department of Civil Engineering, Aalborg University. Torben Larsen has many years of experience with computer simulations...... of transients in pumped pipeline systems. This present publication can be understood as the second and revised edition of the pamphlet ”Transients in pumped sewer mains” (2006) which was published as a technical report by The EVA committee under The Danish Water Pollution Committee (The Danish Society...

  19. Water Hammer Simulations of Monomethylhydrazine Propellant

    Science.gov (United States)

    Burkhardt, Zachary; Ramachandran, N.; Majumdar, A.

    2017-01-01

    Fluid Transient analysis is important for the design of spacecraft propulsion system to ensure structural stability of the system in the event of sudden closing or opening of the valve. Generalized Fluid System Simulation Program (GFSSP), a general purpose flow network code developed at NASA/MSFC is capable of simulating pressure surge due to sudden opening or closing of valve when thermodynamic properties of real fluid are available for the entire range of simulation. Specifically GFSSP needs an accurate representation of pressure density relationship in order to predict pressure surge during a fluid transient. Unfortunately, the available thermodynamic property programs such as REFPROP, GASP or GASPAK do not provide the thermodynamic properties of Monomethylhydrazine(MMH). This work illustrates the process used for building a customized table of properties of state variables from available properties and speed of sound that is required by GFSSP for simulation. Good agreement was found between the simulations and measured data. This method can be adopted for modeling flow networks and systems with other fluids whose properties are not known in detail in order to obtain general technical insight.

  20. Testing Hammer and Stanton's Reengineering Success Diagnostic

    OpenAIRE

    Felicity Murphy; Peter Seddon; Sandy Staples

    2000-01-01

    Business Process Reengineering (BPR) is no longer referenced in academic literature with the regularity that it was in the heady days of the mid-nineties but it is still in use in Australian organisations. We are also changing processes radically as new software is implemented or new electronic markets are embraced and the lessons of reengineering can be applied to these process changes. This study makes three main contributions by: (1) investigating the organisational context prior to the...

  1. MEPs : ban hammer, sickle and swastika

    Index Scriptorium Estoniae

    2005-01-01

    Europarlamendi liikmete Vytautas Landsbergise ja Jozsef Szajeri avalduse kohaselt tuleks Euroopa Liidus ettevalmistatava seaduse raames, mis keelustaks natsisümboli - haakristi - kasutamise, keelata ka kommunismi sümboolika kasutamine

  2. EuroPlus+ Reward / Alar Hammer

    Index Scriptorium Estoniae

    Hammer, Alar

    2000-01-01

    EuroPlus+ Reward on mitmes versioonis ilmunud inglise keele õppeprogramm, milles on ühendatud multimeedia võimalused ning distantsõpe ning mis loob täiesti uued võimalused keele omandamiseks arvuti abil

  3. Streekproducten: een goed verhaal is het hele werk

    NARCIS (Netherlands)

    H. Ottenhof

    2011-01-01

    Streekproducten staan in de belangstelling. Regio's proberen graag 'hun' producten enkel uit de eigen streek te laten komen en ook consumenten reageren hierop. Het is echter moeilijk om een product altijd met een regio te kunnen verbinden. Wat maakt een kaas nu een echte Goudse of een ham een echte

  4. 1. IV toimus Kõrvekülas... / Hele Ellermaa

    Index Scriptorium Estoniae

    Ellermaa, Hele

    2005-01-01

    Toimus Hans Christian Anderseni 200. sünniaastapäevale ja rahvusvahelisele lasteraamatupäevale pühendatud IV Tartumaa lasteraamatupäev. Konkursile laekus 172 joonistust, 14 kirjatööd ja 73 paberlõikepilti. Laste tööde näitus on avatud Kõrveküla raamatukogus kuni 16. IV

  5. Diskoerse oor heling in ’n narratief- pastorale benadering

    Directory of Open Access Journals (Sweden)

    Julian Müller

    2006-07-01

    Full Text Available Discourses of healing in a narrative-pastoral approach In this article fiction is used as a metaphor. True to the metaphor of fiction, this research was done through participatory action research. Conversations on the subject of healing are researched by investigating written resources and case studies as well as listening to qualified opinions. In order for healing to be widely understood, a diversity of fictional works are offered. By looking at the documented meanings of scientific disciplines and conversations it is crystal clear that healing has become a fashionable word and has apparently always been one. There are various conversations on the topic of healing, ranging from medical, theological, and even alternative perspectives. The research was done in a post- modern society, and the characteristics of this era implemented as such. A unique outcome of this dialogue is the new and fresh understanding of healing as a word which includes the person as a whole and not as a fragmented object. The culmination describes an unique discussion of healing by embracing illness as part of human existence. Brokenness is used as a point of departure in contrast with the illusion of healing.

  6. Ühele õigused, teisele kohustused? / Heljo Pikhof

    Index Scriptorium Estoniae

    Pikhof, Heljo, 1958-

    2008-01-01

    Uue töölepingu seaduse eelnõust. Ilmunud ka Vooremaa 5. veeb. 2008, lk. 2 ; Pärnu Postimee 7. veeb. 2008, lk. 15 ; Hiiu Leht 8. veeb. 2008, lk. 2 ; Harju Ekspress 8. veeb. 2008, lk. 6 ; Meie Maa 8. veeb. 2008, lk. 2

  7. Actieplan Hout 2000; een plan voor de hele sector?

    NARCIS (Netherlands)

    Wijk, van M.N.; Vliet, van C.M.

    1999-01-01

    Aan de hand van vier thema's wordt een aantal concrete actiepunten besproken om te komen tot een verbetering van de economische situatie in de Nederlandse bos- en houtsector en een verhoging van het houtgebruik in Nederland. Het gaat bij de thema's om voorlichting en promotie (duurzaamheid!),

  8. Igaühele hea haridus!? / Olav Aarna

    Index Scriptorium Estoniae

    Aarna, Olav, 1942-

    2005-01-01

    Ilmunud ka: Järva Teataja 1. september lk. 2, Meie Maa 1. september lk. 2, Koit 1. september lk. 6, Severnoje Poberezhje 1. september lk. 2, Vali Uudised 2. september lk. 2, Sakala 2. september lk. 2, Hiiu Leht 2. september lk. 2, Kuulutaja 2. september lk. 4, Nädaline 8. september lk. 4. Riigikogu kultuurikomisjoni esimehe sõnul peaks igaüks sõnastama enda jaoks rahuldava vastuse küsimusele, mis on hea haridus

  9. Uku ja Eha Masing - õiglased rahvaste hulgas / Hele Israel

    Index Scriptorium Estoniae

    Israel, Hele

    2009-01-01

    Holokausti keskuses Yad Vashem on juute aidanud inimestele pühendatud mälestustahvlid. Inimesi, kes holokausti käigus aitasid juute, nimetatakse õiglased rahvaste hulgas, kelle hulka kuuluvad ka Uku ja Eha Masing

  10. Viis kandidaati ühele õpetajakohale / Raivo Juurak

    Index Scriptorium Estoniae

    Juurak, Raivo

    2007-01-01

    Programmist "Noored kooli", etapi lõpuks selgitati välja 13 noort, kes lähevad tänavu 1. septembril kooli õpetajaks. Oma hinnangu programmile annavad üliõpilased: TTÜ geenitehnoloogiast P. Uuemaa, TTÜ logistikast K. Lillemets, EKA tekstiilidisainist I. Gross, TÜ inglise filoloogiast R. Kurg, TÜ hispaania keele ja politoloogia üliõpilane L. Prikk, TLÜ inglise filoloogiast T.-K. Kaber, TÜ eesti keel vene koolis erialalt N. Reppo, TTÜ geenitehnoloogiast P. Ahte ja TÜ inglise filoloogiast H. Haljaste

  11. Harry Potter interneti lugemistoas / Anu Ratasep, Hele Kriisa

    Index Scriptorium Estoniae

    Ratasep, Anu

    2001-01-01

    2000.a. viie Tallinna kooli osavõtul toimunud projektist R-LIIT, mille käigus valiti üks raamat (J.K. Rowling "Harry Potter ja tarkade kivi") ning arutleti selle üle nii koolides kui Interneti vahendusel. Osalesid eesti ja vene õppekeelega koolid, projektiga lisandus eri rahvusest noorte integratsiooni idee

  12. Godsdiens: Middel tot verslawing of tot heling? | Coetzer | Acta ...

    African Journals Online (AJOL)

    There are two sides to religion, on the one hand the threat that implies emotional pain and addiction, on the other hand the healing and liberating effect of a balanced and healthy religion. In this article the focus is on the former. Factors which render people vulnerable to spiritual addiction are put on the table. Similarities ...

  13. Influência da distribuição granulométrica de argilas para via seca sobre o rendimento de moagem em moinho de martelos Influence of granule size distribution of clays for dry route on milling yield in the hammer mill

    Directory of Open Access Journals (Sweden)

    H. J. Alves

    2010-03-01

    Full Text Available Um método para avaliar a dureza e o rendimento na moagem de matérias-primas para a fabricação de revestimentos cerâmicos por via seca foi o objetivo deste trabalho. A avaliação do potencial de uso de uma dada matéria-prima argilosa para a indústria de revestimentos cerâmicos por via seca não costuma contemplar características como a dureza e o rendimento na moagem, mas estas características afetam a durabilidade e o desempenho dos moinhos de martelos e pendulares nas indústrias, além da produtividade do processo de fabricação. Seis amostras industriais foram caracterizadas quanto à distribuição granulométrica antes e após a moagem em moinho de martelos de laboratório, sob duas condições iniciais de distribuição. As avaliações consideraram as alterações nos coeficientes de distribuição n e nos teores de material mais fino do que malha 45 (355 µm. A metodologia proposta mostrou-se útil para caracterizar as matérias-primas quanto à dureza e o rendimento na moagem.A method to evaluate the hardness and milling yield of raw materials to dry route ceramic tiles industry was the goal of this work. Evaluation of the potential of a clayish raw material to dry route ceramic tiles industry does not cover characteristics such as hardness and milling yield, but these characteristics also affect, besides durability and performance of hammer and pendular industrial mills, the productive process. Six industrial samples were characterized to grain size distribution before and after being milled in a laboratorial hammer mill, under two initial size distributions. The evaluations considered the changes in distribution coefficient modulus n and in the fractions smaller than sieve 45 (355 µm. Proposed methodology proved to be useful to characterize raw materials according to its hardness and milling yield.

  14. Autoralli MM-sarja ootab ees vaheaasta / Ivo Dobkevitš ; fotod Karli Saul

    Index Scriptorium Estoniae

    Dobkevitsch, Ivo, 1973-

    2009-01-01

    Tehasetiimide majandusraskustest ja vähesest huvist autoralli MM-sarja vastu 2009. aastal ning FIA poolt kehtestatavatest tehnilistest muudatustest 2010. aastal. Samas: Urmo Aava hooaega vahele jätta ei kavatse

  15. Uhiuus orkester Tallinn Sinfonietta / Ivo Lille ja Risto Joost ; intervjueerinud Kristina Kõrver

    Index Scriptorium Estoniae

    Lille, Ivo, 1977-

    2009-01-01

    Kontserdiagentuurist HIMusic Agency ja Tallinn Sinfoniettast räägivad dirigent R. Joost ja I. Lille. Avakontserdist Vene Kultuurikeskuses, kus oli kavas Mozarti sümfooniad 1, 10 ja 40 ning kontsertaariad bulgaaria soprani Sonya Youncheva esituses

  16. I tweet, therefore I am / Andrei Korobeinik, Henrik Roonemaa, Mati Hint ; intervjueerinud Ivo Visak

    Index Scriptorium Estoniae

    Korobeinik, Andrei, 1980-

    2014-01-01

    Tehnoloogiaajakirjanik Henrik Roonemaa, suhtlusvõrgustiku rate.ee looja Andrei Korobeinik ning keele- ja ühiskonnateadlane Mati Hint vestlesid y-generatsiooni digitaliseerumise teemadel Paide arvamusfestivalil

  17. Život s více jazyky. K "osmdesátce" Ivo Vasiljeva

    Czech Academy of Sciences Publication Activity Database

    Brouček, Stanislav

    32 /74/, č. 1 (2015), s. 85-95 ISSN 1211-8117 Institutional support: RVO:68378076 Keywords : history of ethnology * migration * ethnicity * biography * aniversary * bibliography Subject RIV: AC - Archeology, Anthropology, Ethnology

  18. IVO participation in IAEA benchmark for VVER-type nuclear power plants seismic analysis and testing

    Energy Technology Data Exchange (ETDEWEB)

    Varpasuo, P.

    1997-12-01

    This study is a part of the IAEA coordinated research program `Benchmark study for the Seismic Analysis and Testing of VVER Type NPPs`. The study reports the numerical simulation of the blast test for Paks and Kozloduy nuclear power plants beginning from the recorded free-field response and computing the structural response at various points inside the reactor building. The full-scale blast tests of the Paks and Kozloduy NPPs took place in December 1994 and in July 1996. During the tests the plants operated normally. The instrumentation for the tests consisted of 52 recording channels with 200 Hz sampling rate. Detonating 100 kg charges in 50-meter deep boreholes at 2.5-km distance from the plant carried out the blast tests. The 3D structural models for both reactor buildings were analyzed in the frequency domain. The number of modes extracted in both cases was about 500 and the cut-off frequency was 25 Hz. In the response history run the responses of the selected points were evaluated. The input values for response history run were the three components of the excitation, which were transformed from time domain to the frequency domain with the aid of Fourier transform. The analysis was carried out in frequency domain and responses were transferred back to time domain with inverse Fourier transform. The Paks and Kozloduy blast tests produced a wealth of information on the behavior of the nuclear power plant structures excited by blast type loads containing also the low frequency wave train if albeit with small energy content. The comparison of measured and calculated results gave information about the suitability of the selected analysis approach for the investigated blast type loading. 25 refs.

  19. Uudised : Eesti rahvusdiskograafia edu Viinis. Fond noorele muusikule. Kammerkontsertide sari / Ivo Pilve

    Index Scriptorium Estoniae

    Pilve, Ivo

    1999-01-01

    Viinis toimunud Rahvusvahelise Heliarhiivide Assotsiatsiooni aastakonverentsist, kus esitleti H.Pedusaare koostatud "Eesti heliplaatide koondkataloogi 1901-1939" ja K.Riisalu koostatud pärastsõjaaegsete helisalvestiste diskograafiat Eestis. J.Oti otsusest asutada fond, mis aitab kaasa paremate pillide muretsemisele eesti muusikaõpilastele. 2. okt. alustas teist hooaega Nõmme kultuurikeskuse kammerkontsertide sari "Valguses & varjuses". Esines M.Palm

  20. Kunstiajaloolased Tartu Ülikoolis aastail 1940-1989 / Mart-Ivo Eller

    Index Scriptorium Estoniae

    Eller, Mart-Ivo, 1936-2003

    1994-01-01

    Lisa nr. 1: Tartu Riiklikus Ülikoolis aastail 1948-1989 kaitstud kunstiajaloo-alased diplomitööd. Lisa nr. 2: Tartu Riiklikus Ülikoolis aastail 1964-1975 kaitstud kunstiteaduste kandidaadi väitekirjad; Tartu Ülikooli ja Tartu Riikliku Ülikooli lõpetanud, kes on kaitsnud väitekirja väljaspool ülikooli

  1. Pilk Noor-Eesti seminarile Tallinna Ülikoolis / Ivo Heinloo

    Index Scriptorium Estoniae

    Heinloo, Ivo

    2005-01-01

    9. mail toimus Tallinna Ülikoolis Noor-Eesti liikumise 100. sünniaastapäevale pühendatud rahvusvaheline kirjandusseminar "Noor-Eesti 100". Toomas Haug rääkis nooreestlasest frankofiilist Rudolf Lestast. Ettekandega osalesid veel Toomas Liiv, Elo Lindsalu, Õnne Kepp, Tiit Hennoste, Benedikts Kalnach (Läti), Ramutis Karmalavichius (Leedu), Maija Burima (Läti)

  2. Projekt EUth, platvorm OPIN ja noorte e-osalemine / Teo Gregov, Kerstin Franzi ; kommenteerinud Ivo Visak

    Index Scriptorium Estoniae

    Gregov, Teo

    2016-01-01

    Projekti EUth eesmärk on suurendada noorte huvi ja aktiivset osalemist nii kohalikes kui ka Euroopa poliitilistes institutsioonides ja organisatsioonides. Projekti tulemusena valmis veebiplatvorm OPIN (www.opin.me), mis aitab projekte kavandada ja hallata

  3. Playtechi büroo = Offices of Playtech / Jan Skolimowski, Maie Raud ; kommenteerinud Ivo Lasn

    Index Scriptorium Estoniae

    Skolimowski, Jan, 1977-

    2016-01-01

    IT-arendusettevõtte Playtech Tallinna osakonna bürooruumid Ülemiste City uues hoones Lõõtsa tn. 5. Arhitektid Jan Skolimowski, Maie Raud (KAMP Arhitektid). Logo ja viidagraafika Martin Eelma (Tuumik)

  4. Kriminaalpolitsei vajab süsteemset arendamist / Ivo Känd

    Index Scriptorium Estoniae

    Känd, Ivo

    2008-01-01

    Ilmunud ka: Den za Dnjom 28. märts lk. 22. Kirjutades siseministrite reformidest politseitöö tõhustamisel arvab autor, et kriminaalpolitseinike arvu vähendamine praegu ja järgmisel aastal on vale, samuti on vale kriminaalpolitseinike arvel saavutada paremat korrakaitset

  5. Separation of Functions and Profession Related Arrangements between Owners and Managers in Estonia / Ivo Vaks

    Index Scriptorium Estoniae

    Vaks, Ivo

    2006-01-01

    Lühikokkuvõte omanike ja tippjuhtide vastastikustest suhetest Eestis äriühingute valitsemise vaatevinklist, mis põhineb autori magistritööl "Metoodika väljatöötamine aktsiaseltside valitsemise uurimiseks", 2002 ning Eesti Tuleviku-uuringute Instituudi, TTÜ ja EBS-i koostöös 2004 sügisel läbiviidud eeluuringul äriühingute valitsemisest Eestis

  6. Hankijate horisontaalse koostöö kriteeriumid. Kohtupraktika ja uued hankedirektiivid / Ivo Pilving

    Index Scriptorium Estoniae

    Pilving, Ivo, 1975-

    2016-01-01

    Horisontaalsest koostööst ja selle lubatavuse kriteeriumidest. Asjakohasest Euroopa Kohtu ja valitud liikmesriikide praktikast, uute direktiivide asjakohaste sätete põhisisust. Riigihankeõiguslikest eeldustest horisontaalse koostöö tegemiseks

  7. Aapo Puki fantastiline menu nii idas kui läänes / Ivo Parbus

    Index Scriptorium Estoniae

    Parbus, Ivo, 1959-

    2004-01-01

    New Yorgi kunstikeskus Art Renewal Center valis 2003. a. konkursil auhinna Honorable Mention laureaadiks Aapo Puki õlimaaliga "Natalja Sigarimajas". Suurbritannia Kuninglik Portreemaalijate Ühing eksponeerib maali oma aastanäitusel

  8. Význam hybridizace v evoluci živočichů

    OpenAIRE

    Šárová, Markéta

    2017-01-01

    There is a growing number of studies showing that interspecific hybridization and gene introgression have a creative role in the evolution of animals. These studies emphasize that hybridization and a gene introgression represent an important source of a genetic variability. Within the process of adaptive introgression, adaptive traits may spread among species and help them to colonize new environments. Interspecific hybridization may also contribute to the emergence of new phenotypes and evol...

  9. Kas offshore on riigile kasulik või kahjulik? / Ivo Vanasaun

    Index Scriptorium Estoniae

    Vanasaun, Ivo

    2003-01-01

    Autor vastab küsimustele, kuidas offshore'i ära tunda, miks Eesti ei ole madala maksumääraga piirkond ning missugused maksumuudatused on kavas seoses offshore'i piirkonnas registreeritud ettevõtetega

  10. Hammering Yucca Flat, Part Two: Shear-Wave Velocity

    Science.gov (United States)

    Finlay, T. S.; Abbott, R. E.; Knox, H. A.; Tang, D. G.; James, S. R.; Haney, M. M.; Hampshire, J. B., II

    2015-12-01

    In preparation for the next phase of the Source Physics Experiment (SPE), we conducted an active-source seismic survey of Yucca Flat, Nevada, on the Nevada National Security Site. Results from this survey will be used to inform the geologic models associated with the SPE project. For this study, we used a novel 13,000 kilogram weight-drop seismic source to interrogate an 18-km North-South transect of Yucca Flat. Source points were spaced every 200 meters and were recorded by 350 to 380 3-component 2-Hz geophones with variable spacings of 10, 20, and 100 meters. We utilized the Refraction-Microtremor (ReMi) technique to create multiple 1D dispersion curves, which were then inverted for shear-wave velocity profiles using the Dix inversion method (Tsai and Haney, 2015). Each of these 1D velocity models was subsequently stitched together to create a 2D profile over the survey area. The dispersion results indicate a general decrease in surface-wave phase velocity to the south. This result is supported by slower shear-wave velocity sediments and increasing basin depth towards the survey's southern extent. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000.

  11. Electric vehicle test report Cutler-Hammer Corvette

    Science.gov (United States)

    1981-01-01

    Vehicles were characterized for the state of the art assessment of electric vehicles. The vehicle evaluated was a Chevrolet Corvette converted to electric operation. The original internal combustion engine was replaced by an electric traction motor. Eighteen batteries supplied the electrical energy. A controller, an onboard battery charger, and several dashboard instruments completed the conversion. The emphasis was on the electrical portion of the drive train, although some analysis and discussion of the mechanical elements are included. Tests were conducted both on the road (actually a mile long runway) and in a chassis dynamometer equipped laboratory. The majority of the tests performed were according to SAE Procedure J227a and included maximum effort accelerations, constant speed range, and cyclic range. Some tests that are not a part of the SAE Procedure J227a are described and the analysis of the data from all tests is discussed.

  12. Detailed structure of pipe flow with water hammer oscillations | Kioni ...

    African Journals Online (AJOL)

    Herein, the evolution and detailed structure of velocity and pressure fields of an oscillating axi-symmetric pipe flow arising from a rapid closure of a valve has been determined through the solution, by the Finite Volume technique, of the full Navier Stokes equations. The method correctly predicts the distortion of the pressure ...

  13. Modeling and analysis of water-hammer in coaxial pipes

    CERN Document Server

    Cesana, Pierluigi

    2015-01-01

    The fluid-structure interaction is studied for a system composed of two coaxial pipes in an annular geometry, for both homogeneous isotropic metal pipes and fiber-reinforced (anisotropic) pipes. Multiple waves, traveling at different speeds and amplitudes, result when a projectile impacts on the water filling the annular space between the pipes. In the case of carbon fiber-reinforced plastic thin pipes we compute the wavespeeds, the fluid pressure and mechanical strains as functions of the fiber winding angle. This generalizes the single-pipe analysis of J. H. You, and K. Inaba, Fluid-structure interaction in water-filled pipes of anisotropic composite materials, J. Fl. Str. 36 (2013). Comparison with a set of experimental measurements seems to validate our models and predictions.

  14. Flip Feng Shui: Hammering a Needle in the Software Stack

    NARCIS (Netherlands)

    Razavi, K.; Gras, Ben; Bosman, Erik; Preneel, Bart; Giuffrida, Cristiano; Bos, H.J.

    2016-01-01

    We introduce Flip Feng Shui (FFS), a new exploitation vector which allows an attacker to induce bit flips over arbitrary physical memory in a fully controlled way. FFS relies on hardware bugs to induce bit flips over memory and on the ability to surgically control the physical memory layout to

  15. History of Statistics in Real Time: Hammers and Nails

    Science.gov (United States)

    1992-05-01

    homogeneous sub- by the time of Laplace’s death in 1827 a ma- classifications for analysis Quetelet had sought jor success had been recorded, and the...normal distribu- quarter-from studies of heredity. tion Quetelet had found be disassembled to al- Galton, Edgeworth, and Pearson assembled the low a

  16. A Solution to Hammer's X-ray Reconstruction Problem

    DEFF Research Database (Denmark)

    Gardner, Richard J.; Kiderlen, Markus

    2007-01-01

    We propose algorithms for reconstructing a planar convex body K from possibly noisy measurements of either its parallel X-rays taken in a fixed finite set of directions or its point X-rays taken at a fixed finite set of points, in known situations that guarantee a unique solution when the data is...... to K in the Hausdorff metric as k tends to infinity. This solves, for the first time in the strongest sense, Hammer’s X-ray problem published in 1963....

  17. a comparative analysis of the rebound hammer and ultrasonic pulse

    African Journals Online (AJOL)

    2012-03-01

    Mar 1, 2012 ... estimates of in-situ strength can be attained if the correlation between the compressive strength and the non-destructive test measurement for the same kind of concrete is established. Analysis of the results show that no significant difference exists between the set of results obtained from both methods ...

  18. Hammer Down: The Battle for the Watapur Valley, 2011

    Science.gov (United States)

    2014-01-01

    partnered with Simmons’ platoon briefly went missing in the darkness until he was discovered sitting behind a bush . It took more than 30 minutes for...the goat meat . The Afghan platoon partnered with First Lieutenant Martin’s platoon demanded opium the same day. The Americans, unsurprisingly

  19. Cavitation in horizontal pipelines due to water hammer

    NARCIS (Netherlands)

    Kalkwijk, J.P.T.; Kranenburg, C.

    1971-01-01

    When designing a pipeline for the transport of a liquid one of the problems to be considered is the provision of a device to guard against low pressures. These low pressures can be caused, for example, by a sudden pump failure. The failure creates a negative pressure wave which travels in the

  20. Measurement and analysis of the water hammer in ram pump

    Indian Academy of Sciences (India)

    This paper presents the results of experimental research of the phenomena occurring in water ram during a single cycle of its operation. Apart from a brief introduction and description of the test stand and data recording system, the work includes a broad interpretation of the obtained results. Based on the pressure ...

  1. Tap Testing Hammer using Unmanned Aerial Systems (UASs)

    Energy Technology Data Exchange (ETDEWEB)

    Mason, JaMein DeShon [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ayorinde, Emmanuel Temiloluwa [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Mascarenas, David Dennis [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Moreu, Fernando [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)

    2016-08-11

    This is the final poster for a Student Symposium at Los Alamos National Laboratory. This research describes the development, validation, and testing of a remote concrete tapping mechanism enabled by UAS. The conclusion is the following: The results quantify for the first time concrete tapping data collected remotely with UAS, enabling cost-effective, safer and sustainable upgrade prioritization of railroad bridges inventories.

  2. Prinsessen og det hele kongerige. Christian IX og det glücksborgske kongehus

    DEFF Research Database (Denmark)

    Olden-Jørgensen, Sebastian

    Det glücksborgske kongehus' begyndelse og udvikling analyseres med særlig vægt på begreberne nærhed og distance samt welfare monarchy.......Det glücksborgske kongehus' begyndelse og udvikling analyseres med særlig vægt på begreberne nærhed og distance samt welfare monarchy....

  3. Effects of small surface tension in Hele-Shaw multifinger dynamics: an analytical and numerical study.

    Science.gov (United States)

    Pauné, E; Siegel, M; Casademunt, J

    2002-10-01

    We study the singular effects of vanishingly small surface tension on the dynamics of finger competition in the Saffman-Taylor problem, using the asymptotic techniques described by Tanveer [Philos. Trans. R. Soc. London, Ser. A 343, 155 (1993)] and Siegel and Tanveer [Phys. Rev. Lett. 76, 419 (1996)], as well as direct numerical computation, following the numerical scheme of Hou, Lowengrub, and Shelley [J. Comput. Phys. 114, 312 (1994)]. We demonstrate the dramatic effects of small surface tension on the late time evolution of two-finger configurations with respect to exact (nonsingular) zero-surface-tension solutions. The effect is present even when the relevant zero-surface-tension solution has asymptotic behavior consistent with selection theory. Such singular effects, therefore, cannot be traced back to steady state selection theory, and imply a drastic global change in the structure of phase-space flow. They can be interpreted in the framework of a recently introduced dynamical solvability scenario according to which surface tension unfolds the structurally unstable flow, restoring the hyperbolicity of multifinger fixed points.

  4. Kaplan og Norton bør læses af hele ledelsen

    DEFF Research Database (Denmark)

    Bukh, Per Nikolaj

    2009-01-01

    Anmeldelse af "Eksekveringsgevinsten - Øget konkurrencekraft med fokuseret strategi og drift", Robert S. Kaplan & David P. Norton, 2009, Gyldendal Business. Udgivelsesdato: 8. april......Anmeldelse af "Eksekveringsgevinsten - Øget konkurrencekraft med fokuseret strategi og drift", Robert S. Kaplan & David P. Norton, 2009, Gyldendal Business. Udgivelsesdato: 8. april...

  5. Gas Bubbles in Liquid Metal in a Hele-Shaw Cell; A Mesoscopic Study

    OpenAIRE

    Klaasen, Bart

    2014-01-01

    Gas injection reactors in general, and bubble column reactors in particular, are key elements of many pyrometallurgical flow charts. Nevertheless, the phenomena and interactions that govern these reactors are not yet fully understood. From a multiscale point of view, the main bottleneck is situated at a mesoscopic level on which individual bubbles are considered. While simulations and water models can be very helpful to widen this bottleneck, experimental observations of gas bubbles in real p...

  6. Hendrik-Jan de tuinman moet eruit! : mobbing, een zaak van het hele bedrijf?

    NARCIS (Netherlands)

    Kooijman, H.; Nossent, S.; Hark, T. ter

    2005-01-01

    Wat begint als een geintje met een persoon ontaardt in pesten, intimideren of 'mobbing' door een groep collega's. Hoe voorkom je dat het zover komt? In dit artikel geven deskundigen hier, naar aanleiding van een rollenspel, hun mening over. Als belangrijkste tips komen naar voren: snel ingrijpen,

  7. Selle kevade kunstiraamatud : ühele ajalugu, teisele avangard / Ants Juske

    Index Scriptorium Estoniae

    Juske, Ants, 1956-2016

    2009-01-01

    Raamatutest: Seest suurem kui väljast : ühe naiskunstniku lugu / koostanud ja kujundanud Mark Soosaar. Pärnu Uue Kunsti Muuseum, 2009 (pühendatud Mark Soosaare emale Lydia Nirk-Soosaarele); Luminoso / kujundanud Indrek Sirkel. 2009 (Raul Rajangu loomingust)

  8. Curvature driven motion of a bubble in a toroidal Hele-Shaw cell.

    Science.gov (United States)

    Mughal, A; Cox, S J; Schröder-Turk, G E

    2017-08-06

    We investigate the equilibrium properties of a single area-minimizing bubble trapped between two narrowly separated parallel curved plates. We begin with the case of a bubble trapped between concentric spherical plates. We develop a model which shows that the surface energy of the bubble is lower when confined between spherical plates than between flat plates. We confirm our findings by comparing against Surface Evolver simulations. We then derive a simple model for a bubble between arbitrarily curved parallel plates. The energy is found to be higher when the local Gaussian curvature of the plates is negative and lower when the curvature is positive. To check the validity of the model, we consider a bubble trapped between concentric tori. In the toroidal case, we find that the sensitivity of the bubble's energy to the local curvature acts as a geometric potential capable of driving bubbles from regions with negative to positive curvature.

  9. Experimental viscous fingering in a tapered radial Hele-Shaw cell

    Science.gov (United States)

    Bongrand, Gregoire; Tsai, Peichun Amy; Complex Fludis Group Team

    2017-11-01

    The fluid-fluid displacement in porous media is a common process that finds direct applications in various fields, such as enhanced oil recovery and geological CO2 sequestration. In this work, we experimentally investigate the influence of converging cells on viscous fingering instabilities using a radially-tapered cell. For air displacing oil, in contrast to the classical Saffman-Taylor fingering, our results show that a converging gradient in a radial propagation can provide a stabilizing effect and hinder fingering. For a fixed gap gradient and thickness, with increasing injection rates we find a stable displacement under small flow rates, whereas unstable fingering occurs above a certain threshold. We further investigate this critical flow rate delineating the stable and unstable regimes for different gap gradients. These results reveal that the displacement efficiency not only depends on the fluid properties but also on the interfacial velocity and channel structure. The latter factors provide a useful and convenient control to either trigger or inhibit fingering instability. NSERC Discovery, Accelerator, and CRC programs.

  10. Mediální obraz stanic pro zraněné živočichy

    OpenAIRE

    Průchová, Jaroslava

    2008-01-01

    The objective of this thesis " Medial icon of casualty animals' central rescue stations "is to find out the medial icon of central rescue stations engaged in protection of free-living animals and medical icon of the others ecologic enterprises in regional journal Deník. The intention of this thesis will be assignment by the contentual analysis of articles issued in regional journal how media in Czech republic presented acivities of the central rescue stations engaged in protection of free-liv...

  11. Fake News und Cyber Mobbing – Zur internationalen Zuständigkeit bei Persönlichkeitsrechtsverletzungen / Ivo Bach

    Index Scriptorium Estoniae

    Bach, Ivo

    2018-01-01

    Internetis/veebisaidis avaldatud teabega seotud kohtuasjadest, ka Eesti kohtutes arutlusel olnud kohtuasjast Bolagsupplysningen OÜ hagi Svensk Handel AB vastu ebaõigete andmete ümberlükkamiseks, kommentaare eemaldama kohustamiseks ja varalise kahju väljamõistmiseks

  12. Interakce mezi živočichy a rostlinami v městských lesích

    OpenAIRE

    DOBEŠOVÁ, Jana

    2015-01-01

    INTERACTIONS BETWEEN ANIMALS AND PLANTS IN URBAN FORESTS ABSTRACT This Bachelor thesis focuses on the influence of big mammals (especially Cervidae, wild boars, badgers and foxes) on herb understory in urban forests. Cities are continuously expanding and thus occupy natural habitats of the animals. Therefore, these animals are habituating in urban forests. The specific conditions of both urban and forest habitats and their influences on animal and plant distribution are mentioned. From the po...

  13. Effects of HIV/AIDS On rural farmers activities in Ivo L.G.A of Ebonyi ...

    African Journals Online (AJOL)

    Descriptive statistics were used for data analysis. Findings revealed that 95.8% of the respondents have heard of HIV/AIDS and 4.2% claimed to be ignorant of their HIV status. Also, 90.8% of the respondents were aware of its mode of transmission while, 30% knew how it can be controlled and avoided. It was also revealed ...

  14. The comparison of assessment of pigeon semen motility and sperm concentration by conventional methods and the CASA system (HTM IVOS).

    Science.gov (United States)

    Klimowicz, M D; Nizanski, W; Batkowski, F; Savic, M A

    2008-07-01

    The aim of these experiments was to compare conventional, microscopic methods of evaluating pigeon sperm motility and concentration to those measured by computer-assisted sperm analysis (CASA system). Semen was collected twice a week from two groups of pigeons, each of 40 males (group I: meat-type breed; group II: fancy pigeon) using the lumbo-sacral and cloacal region massage method. Ejaculates collected in each group were diluted 1:100 in BPSE solution and divided into two equal samples. One sample was examined subjectively by microscope and the second one was analysed using CASA system. The sperm concentration was measured by CASA using the anti-collision (AC) system and fluorescent staining (IDENT). There were not any significant differences between the methods of evaluation of sperm concentration. High positive correlations in both groups were observed between the sperm concentration estimated by Thom counting chamber and AC (r=0.87 and r=0.91, respectively), and between the sperm concentration evaluated by Thom counting chamber and IDENT (r=0.85 and r=0.90, respectively). The mean values for CASA measurement of proportion of motile spermatozoa (MOT) and progressive movement (PMOT) were significantly lower than the values estimated subjectively in both groups of pigeons (pCASA system is very rapid, objective and sensitive method in detecting subtle motility characteristics as well as sperm concentration and is recommended for future research into pigeon semen.

  15. IVO, a device for In situ Volatilization and On-line detection of products from heavy ion reactions

    CERN Document Server

    Duellmann, C E; Eichler, R; Gäggeler, H W; Jost, D T; Piguet, D; Türler, A

    2002-01-01

    A new gaschromatographic separation system to rapidly isolate heavy ion reaction products in the form of highly volatile species is described. Reaction products recoiling from the target are stopped in a gas volume and converted in situ to volatile species, which are swept by the carrier gas to a chromatography column. Species that are volatile under the given conditions pass through the column. In a cluster chamber, which is directly attached to the exit of the column, the isolated volatile species are chemically adsorbed to the surface of aerosol particles and transported to an on-line detection system. The whole set-up was tested using short-lived osmium (Os) and mercury (Hg) nuclides produced in heavy ion reactions to model future chemical studies with hassium (Hs, Z=108) and element 112. By varying the temperature of the isothermal section of the chromatography column between room temperature and -80 deg. C, yield measurements of given species can be conducted, yielding information about the volatility o...

  16. Uudised : Preemia Ivo Kuusele. MDB püsib konkurentsis. Veljo Tormise autoriõhtu / Priit Kuusk

    Index Scriptorium Estoniae

    Kuusk, Priit, 1938-

    2000-01-01

    4. apr. anti Estonia talveaias üle Harju maavalitsuse preemia I. Kuusele. 1999. a. kuulutati Saksamaal välja konkurss leidmaks uusi ideid infotehnoloogia vallas, mille tulemusena arendas kirjastus "edition 49" välja mahuka muusika andmebaasi 'Musicians Data Base'. Heliloojate Liidu korraldatud aruandeliste loominguõhtute reas tutvustas oma 1989.-1996. a. teoseid V. Tormis

  17. Pristup za održivo planiranje na primeru zaštićenog prirodnog dobra

    Directory of Open Access Journals (Sweden)

    Milić Đorđe

    2007-01-01

    Full Text Available Mostly, natural protected areas in Serbia are classified in category of (so-called special purpose (intended areas and allocated in less developed, depopulated, poverty regions, which are unable for sustainable development. Relatively isolated allocation of these areas, caused migration process in previous period resulting with current problems, such as low density of population (depopulation and low level of economic development (depressed regions and areas. So far, interests (needs and rights of local communities for development and investment were seriously jeopardized by rules of natural protection. In that order, reform of whole system of planning (from defining goals and objectives to management strategies, rules, and principles for implementation based on rules and principles of sustainable development is necessary. Researching influences of economic politics and instruments in order of development and reaching protection aims is particularly important field of future researches. Active participation of local authorities in elaboration of development plans and providing funds with authorities and institutions responsible for managing protected areas is start point for increasing incomes in key sectors, activating produce of goods, tourism and services. So far restrictive approach, so-called "defensive approach" in managing of natural protected area has to be reformed, as basis for new challenges in managing. Defining new priority activities, producing standards and services which are pursuant with rules of protection and rights and interests of local communities are one of the most important activities in that order. Without active participation and negotiation with all actors in process of plans and programs elaboration, as well in creation of several politics from local to national level, is not possible efficient reform of planning practice. This article analyzes current practice and approaches in managing of natural protected areas in order of intention for intensification protection on one side, and investments and development in protected areas, on other side.

  18. godsdiens: middeL ToT versLAWing of ToT heLing?

    African Journals Online (AJOL)

    al family system and a dysfunctional church system as well as parallels between alco holic families and dysfunctional christian families play a significant role in this respect. Linking up with this we have a great measure ..... 'n Weiering om enigsins krities te dink betreffende kerklike informasie of outoriteit — baie uitgesproke.

  19. Behøver det hele være så pænt?

    DEFF Research Database (Denmark)

    Villadsen, Lisa Storm

    lavt.Kilder:Asen, R. ”A Discourse Theory of Citizenship” Quarterly Journal of Speech 90 (2004): 189-211Hartley, J. ”Silly Citizenship” Critical Discourse Studies 7 (2010): 233-248Ivie, R. ”Rhetorical Deliberation and Democratic Politics in the Here and Now” Rhetoric & Public Affairs 5 (2002): 277......-285Goode, L., McCullough, A. & O’Hare, G. ”Unruly publics and the fourth estate on You Tube” Participations 8 (2011): 594-615Grabill, J. & Pigg, S. ”Messy Rhetoric: Identity Performance as Rhetorical Agency in Online Public Forums” Rhetoric Society Quarterly, 42 (2012): 99-119....

  20. INKRIMINASI VEKTOR MALARIA DAN IDENTIFIKASI PAKAN DARAH PADA NYAMUK AnopHELEs SPP DI KECAMATAN BOROBUDUR, KABUPATEN MAGELANG

    Directory of Open Access Journals (Sweden)

    Umi Widyastuti

    2013-12-01

    Full Text Available AbstrakMalaria masih merupakan masalah kesehatan di Kabupaten Magelang, khususnya di Kecamatan Borobudur. Annual Parasite Incidence (API dua tahun terakhir sebesar 0,19 pada tahun 2004 dan meningkat 0,34 pada tahun 2005, menunjukkan status Low Case Incidence (LCI. Kasus malaria di daerah tersebut sehubungan dengan  adanya  beberapa  spesies  nyamuk  Anopheles  yang  potensial  sebagai  vektor  malaria.  Kompetensi vektorial  nyamuk  Anopheles  di  Kecamatan  Borobudur  belum  banyak  dilaporkan,  khususnya  halam  hal kerentanannya terhadap Plasmodium dan sifat antropofilik (kesukaan menghisap darah manusia. Berbagai spesies seperti Anopheles aconitus, An maculatus, dan An. balabacensis merupakan tersangka vektor malaria di daerah tersebut. Tujuan penelitian ini adalah: a. mendeteksi antigen protein circum sporozoit P. falciparum atau P. vivax pada nyamuk Anopheles sp dengan teknik Enzyme Linked Immunosarbant Assay (Elisa dan b.  mengidentifikasi  pakan  darah  manusia  pada  nyamuk  Anopheles  spp  dengan  teknik  Elisa.  Penelitian dilaksanakan pada bulan Januari-Mei 2006 di 2 desa HCI yaitu di Giripurno dan Giritengah, Kecamatan Borobudur. Penelitian dilakukan dengan menangkap nyamuk yang istirahat di dalam dan luar rumah pada malam hari (18.00-12.00 dan pagi hari (06.00-08.00 sesuai dengan metode WHO, 2003. Nyamuk Anopheles spp dipisahkan berdasarkan spesies untuk dihitung kepadatannya. Selanjutnya dilakukan pembedahan ovarium untuk  mengetahui  paritasnya  (parous  atau  nulliparous. Anopheles  spp  parous  (4  spesies  yaitu Anopheles aconitus, An maculatus, An. balabacensis dan An. barbirostris diperiksa kondisi abdomennya untuk kepentingan pengujian dengan ELISA. Keempat spesies nyamuk parous (semua kondisi abdomen yaitu unfed, blood fed, half gravid dan gravid diambil bagian dada-kepala untuk kepentingan Elisa sporozoit. Nyamuk parous dengan kondisi blood fed dan half gravid diambil bagian abdomennya, dipencet di atas kertas Whatman dan digunakan  untuk  ELISA  pakan  darah.  Hasil  penelitian  menunjukkan  bahwa An.  aconitus  rentan  terhadap P. falciparum dengan angka sporozoit sebesar 0,07 % di Giripurno dan sporozoit P. vivax tidak ditemukan, sedangkan di Giritengah, An. balabacensis rentan terhadap P. falciparum dengan angka sporozoit 4,17 % dan sporozoit P. vivax tidak ditemukan. Proporsi An. aconitus menghisap darah manusia (HBI sebesar 10,34 % di Giripurno dan 5,97 % di Giritengah. An balabacensis dan An. barbirostris menunjukkan HBI sebesar 37,50 % dan 5,88% di Giritengah. Angka paritas dan kepadatan An. aconitus di Giripurno relatif lebih tinggi dibanding di Giritengah, sebaliknya An. balabacensis lebih tinggi di Giritengah dibanding di Giripurno.Kata kunci: malaria, Elisa sporozoit, Elisa pakan darah.AbstractMalaria is still a health problem in Magelang Regency, especially in the Borobudur Subdistrict. The Annual Parasite Incidence (API in the last two years were 0.19 in 2004 and increased 0.34 in 2005, were considered as malarious areas with Low Case Incidence (LCI. The increase of malaria cases in Borobudur Subdistrict is related to the presence of Anopheline mosquitoes which serve as potential vector. The vectorial competence of Anopheline mosquitoes in Borobudur Subdistrict has not been reported yet. Several species such as Anopheles aconitus, An. maculatus, An. barbirostris and An. balabacensis are suspected as potential malaria vectors in this area. The objective of this study was to determine the Anophelene mosquitoes susceptibility to Plasmodia and its anthropophilic characteristic. The susceptibility of mosquito to Plasmodia was measured by detection of sporozoite protein antigen (Circum Sporozoite Protein/ CSP of P. falciparum or P. vivax on the head-thorax of all parous mosquitoes. The anthropophilic characteristic was measured by detection of human blood on the abdomen of blood fed and half gravid mosquitoes. Both of these were done by Elisa technique. A study was  conducted  from  Januari  to  May  2001  in  two  HCI  villages  i.e:  Giripurno  and  Giritengah,  Borobudur Subdistrict. The Anopheline mosquitoes were collected using the resting mosquito collection technique both indoors and outdoors, at night (18.00-24.00 as well as in the morning (06.00-08.00 according to the WHO guideline. The density of Anophelenes (4 species was calculated and its parity were determined by microscopic ovary dissection. The result showed that An. aconitus in Giripurno was susceptible to P. falciparum with a sporozoite rate of 0.07 %. However, CSP antigen of P. falciparum was not detected in the head-thorax of mosquitoes from Giritengah. An. balabacensis in Giritengah was susceptible to P. falciparum with a sporozoite rate of 4.17 %. However, CSP antigen of P. falciparum was not detected in the head-thorax of mosquitoes from Giripurno. CSP antigen of P. vivax was also negative in the head-thorax of mosquitoes both from Giripurno and Giritengah villages. The proportion of An. aconitus fed on human (Human Blood Index / HBI was 10.34 % in Giripurno and 5.97 % in Giritengah. HBI of An. balabacensis and An. barbirostris were 37.50 % and 5.88 % respectively in Giritengah. The parity rate of An. aconitus and its density was found higher in Giripurno than in Giritengah. In contrast, the parity rate and density of An. balabacensis was found higher in Giritengah than in Giripurno.Keywords: malaria, sporozoite Elisa, blood meals identification

  1. Ontferming “beyond” vergeving als weg naar heling en heelheid: “Reframing” als narratief-pastorale bemachtiging

    Directory of Open Access Journals (Sweden)

    Tiny van der Schaaf

    2004-11-01

    Full Text Available Mercy beyond forgiveness as a way to healing and wholeness: Reframing as narrative pastoral empowermentThe theme of this article is pastoral counselling with women who have been sexually violated in an ecclesial context. The article focuses on the exegesis of those passages on guilt and forgiveness in the Gospel of Matthew frequently used by theologians and pastors in this regard. The article points to the implications for counselling. The aim is to empower women who have been violated and who struggle with the Christian imperative to forgive. Donald Capps’ notion of “reframing” with regard to “first order” and “second order” change is complemented by the narrative philosophy of Paul Ricoeur on prefiguartion, configuration and refiguartion. The article is concluded by indicating a possibility for the abused woman to be liberated from the lingering power of the abuser. There is no direct link between them any longer. To become whole is the acceptance of forgiveness and to empower others to heal.

  2. Painting the floor with a hammer: Technical fixes in fisheries management

    DEFF Research Database (Denmark)

    Degnbol, P.; Gislason, Henrik; Hanna, S.

    2006-01-01

    Fisheries management benefits from the contribution of several academic disciplines, each with their own perspectives, concerns and solutions. In this essay we argue that the contribution of biology, economics, sociology and other relevant disciplines to fisheries would be improved...... if they originated from broader, more integrated analytical perspectives that are attuned to the empirical realities of fisheries management. Today, disciplinary boundaries narrow the perspectives of fisheries management, creating tunnel vision and standardized technical fixes to complex and diverse management...... in fisheries management will be realized not through the promotion of technical fixes but instead by embracing and responding to the complexity of the management problem....

  3. When All You Have Is a Hammer...: RCTs and Hegemony in Science

    Science.gov (United States)

    Keenan, Mickey; Dillenburger, Karola

    2011-01-01

    People diagnosed with autism spectrum disorder (ASD) deserve the same respect as any other person and should be free to benefit from scientific research that can help them achieve skills which enable them to reach their full potential. Over the past 40 years Applied Behaviour Analysis (ABA) has utilised inductive, natural science methods to…

  4. Next-Generation Sequencing and Epigenomics Research: A Hammer in Search of Nails

    Directory of Open Access Journals (Sweden)

    Shrutii Sarda

    2014-03-01

    Full Text Available After the initial enthusiasm of the human genome project, it became clear that without additional data pertaining to the epigenome, i.e., how the genome is marked at specific developmental periods, in different tissues, as well as across individuals and species-the promise of the genome sequencing project in understanding biology cannot be fulfilled. This realization prompted several large-scale efforts to map the epigenome, most notably the Encyclopedia of DNA Elements (ENCODE project. While there is essentially a single genome in an individual, there are hundreds of epigenomes, corresponding to various types of epigenomic marks at different developmental times and in multiple tissue types. Unprecedented advances in next-generation sequencing (NGS technologies, by virtue of low cost and high speeds that continue to improve at a rate beyond what is anticipated by Moore's law for computer hardware technologies, have revolutionized molecular biology and genetics research, and have in turn prompted innovative ways to reduce the problem of measuring cellular events involving DNA or RNA into a sequencing problem. In this article, we provide a brief overview of the epigenome, the various types of epigenomic data afforded by NGS, and some of the novel discoveries yielded by the epigenomics projects. We also provide ample references for the reader to get in-depth information on these topics.

  5. Hammers and Nails: A response to Lindstrøm and Olsen & Witmore

    DEFF Research Database (Denmark)

    Sørensen, Tim Flohr

    2016-01-01

    Two contrasting arguments on the merits of symmetrical archaeology and an associated discussion of object agency appeared in a recent issue of Archaeological Dialogues (Lindstrøm 2015; Olsen and Witmore 2015). While Torill Christine Lindstrøm extends a thorough, yet hardly new, criticism of the n...

  6. DOE ZERH Case Study: Hammer and Hand, Pumpkin Ridge Passive House, North Plains, OR

    Energy Technology Data Exchange (ETDEWEB)

    none,

    2015-09-01

    Case study of a DOE 2015 Housing Innovation Award winning custom home in the marine climate that got a HERS 49 without PV, or HERS 5 with PV, with 2x4 24” on center walls plus 8” exterior cavity together dense-packed with R-60 cellulose; daylight basement with R-29 rigid EPS foam under slab; vented attic with R-86 blown cellulose; minisplit heat pump; ducted with HRV; 15.5 SEER; 10 HSPF.

  7. Water hammer likely cause of large oil spill in north sea

    NARCIS (Netherlands)

    Nennie, E.D.; Korst, H.J.C.; Lunde, K.; Myklebust, R.

    2010-01-01

    On December 12, 2007, the second largest oil spill in the history of Norwegian oil exploration occurred on StatoilHydro's Statfjord Alpha platform. The spill was caused by a snapped 20″ oil off-loading hose. Thorough investigations by StatoilHydro [1] and by the Norwegian authorities [2] revealed

  8. The Hammer and the Anvil: The Need for A Comprehensive Southwest Border Security Strategy

    Science.gov (United States)

    2010-06-02

    based approach when assessing its performance in the context of international trade and the economy . In doing so, the agency appears to recognize...the Southwest border is the Mérida Initiative. The Mérida Initiative, named after the Yucatan capital where President Bush and Mexican President...three reasons. First, Mexico is a huge country, with a population of more than 100 million. Second, it has a large economy – the 14th largest in

  9. Musik og TV-fiktion. Eller hvad bestiller Jan Hammer egentlig i Miami?

    Directory of Open Access Journals (Sweden)

    Peter Larsen

    1988-08-01

    Full Text Available Hvad sker der med "underlægningsmusikken", når fjernsynets fiktive fortællinger som i Miami Vice bliver til et diffust påskud for en løs associering af driftsbasatte lyst- og angst-scener? For at besvare dette spørgsmål kaster Peter Larsen først et kort blik på musikken i den klassiske Hollywoodfilm og i den traditionelle TV- fiktion. Han analyserer derefter tre længere musikalske sekvenser, der eksemplificerer Miami Vice´s rockidiom, og nogle kortere musik- segmenter, hvor den klassiske Hollywoodfilms musikbrug imiteres - på grænsen til et "operaagtigt over-kill". I sin bestræbelse på at komme ud over tendensen til at sætte ligheds- tegn mellem TV-musik og musikvideo er Peter Larsens artikel en teoretisk opfølgning af Mads Thranholms pædagogiske vink om "Musik til billeder - billeder til musik" i MedieKultur nr. 6.

  10. Fighting the Big War with the Small Hammer: Operational Planning for the Medium Force

    Science.gov (United States)

    2015-05-23

    History, 2007), 5-6; Alan Vick et al., The Stryker Brigade Combat Team: Rethinking Strategic Responsiveness and Assessing Deployment Options (Santa...93 Army Posture Statement 2014, 2 and 16; QDR 2014, 12; Reardon and Charleston, 5-6; Vick et al...Publication (JP) 3‐0, Joint Operations. Washington, DC: Government Printing Office, 2011. Vick , Alan et al., The Stryker Brigade Combat Team

  11. Controlled austempering of hammer forgings aimed at pseudo normalized microstructure directly after deformation

    Directory of Open Access Journals (Sweden)

    P. Skubisz

    2017-01-01

    Full Text Available The study concerns cost-effective realization of controlled thermomechanical processing (CTMP of medium-carbon and HSLA steel aimed at producing microstructure and properties equivalent to normalized condition directly after forging. The results of theoretical and physical modeling of hot forging with subsequent heat treating adopted for industrial realization in continuous manner were verified in semi-industrial conditions of a forge plant.

  12. Dropping the hammer: Examining impact ignition and combustion using pre-stressed aluminum powder

    Science.gov (United States)

    Hill, Kevin J.; Warzywoda, Juliusz; Pantoya, Michelle L.; Levitas, Valery I.

    2017-09-01

    Pre-stressing aluminum (Al) particles by annealing and quenching Al powder alters particle mechanical properties and has also been linked to an increase in particle reactivity. Specifically, energy propagation in composites consisting of aluminum mixed with copper oxide (Al + CuO) exhibits a 24% increase in flame speed when using pre-stressed aluminum (PS Al) compared to Al of the same particle size. However, no data exist for the reactivity of PS Al powders under impact loading. In this study, a drop weight impact tester with pressure cell was designed and built to examine impact ignition sensitivity and combustion of PS Al when mixed with CuO. Both micron and nanometer scale powders (i.e., μAl and nAl, respectively) were pre-stressed, then combined with CuO and analyzed. Three types of ignition and combustion events were identified: ignition with complete combustion, ignition with incomplete combustion, and no ignition or combustion. The PS nAl + CuO demonstrated a lower impact ignition energy threshold for complete combustion, differing from nAl + CuO samples by more than 3.5 J/mg. The PS nAl + CuO also demonstrated significantly more complete combustion as evidenced by pressure history data during ignition and combustion. Additional material characterization provides insight on hot spot formation in the incomplete combustion samples. The most probable reasons for higher impact-induced reactivity of pre-stressed particles include (a) delayed but more intense fracture of the pre-stressed alumina shell due to release of energy of internal stresses during fracture and (b) detachment of the shell from the core during impact due to high tensile stresses in the Al core leading to much more pronounced fracture of unsupported shells and easy access of oxygen to the Al core. The μAl + CuO composites did not ignite, even under pre-stressed conditions.

  13. Water Hammer Simulations of MMH Propellant - New Capability Demonstration of the Generalized Fluid Flow Simulation Program

    Science.gov (United States)

    Burkhardt, Z.; Ramachandran, N.; Majumdar, A.

    2017-01-01

    Fluid Transient analysis is important for the design of spacecraft propulsion system to ensure structural stability of the system in the event of sudden closing or opening of the valve. Generalized Fluid System Simulation Program (GFSSP), a general purpose flow network code developed at NASA/MSFC is capable of simulating pressure surge due to sudden opening or closing of valve when thermodynamic properties of real fluid are available for the entire range of simulation. Specifically GFSSP needs an accurate representation of pressure-density relationship in order to predict pressure surge during a fluid transient. Unfortunately, the available thermodynamic property programs such as REFPROP, GASP or GASPAK does not provide the thermodynamic properties of Monomethylhydrazine (MMH). This paper will illustrate the process used for building a customized table of properties of state variables from available properties and speed of sound that is required by GFSSP for simulation. Good agreement was found between the simulations and measured data. This method can be adopted for modeling flow networks and systems with other fluids whose properties are not known in detail in order to obtain general technical insight. Rigorous code validation of this approach will be done and reported at a future date.

  14. Spreadsheets: Aiming the Accountant's Hammer to Hit the Nail on the Head

    OpenAIRE

    Alliy, Mbwana; Brown, Patty

    2008-01-01

    Accounting and Finance (A&F) Professionals are arguably the most loyal and concentrated population of spreadsheet users. The work that they perform in spreadsheets has the most significant impact on financial data and business processes within global organizations today. Spreadsheets offer the flexibility and ease of use of a desktop application, combined with the power to perform complex data analysis. They are also the lowest cost business IT tool when stacked up against other functional to...

  15. Controlled austempering of hammer forgings aimed at pseudo normalized microstructure directly after deformation

    OpenAIRE

    P. Skubisz

    2017-01-01

    The study concerns cost-effective realization of controlled thermomechanical processing (CTMP) of medium-carbon and HSLA steel aimed at producing microstructure and properties equivalent to normalized condition directly after forging. The results of theoretical and physical modeling of hot forging with subsequent heat treating adopted for industrial realization in continuous manner were verified in semi-industrial conditions of a forge plant.

  16. Initial billet and forging dies shape optimization: Application on an axisymetrical forging with a hammer

    Science.gov (United States)

    Meng, Fanjuan; Labergere, Carl; Lafon, Pascal

    2011-05-01

    In metal forming process, the forging die design is the most important step for products quality control. Reasonable dies shape can not only reduce raw material cost but also improving material flow and eliminating defects. The main objective of this paper is to obtain some optimal parameters of the initial billet and forging dies shape according to the simulation results of a two-step metal forming process (platting step and forging step). To develop this metal forming process optimization system several numerical tools are required: geometric modelling (CATIA V5™), FEM analysis (ABAQUS®), work-flow control and optimization computation (MODEFRONTIER®). This study is done in three stages: simulating the two-step metal forming process, building surrogate meta-models to relate response and variables and optimizing the process by using advanced optimization algorithms. In this paper, a two-step axisymmetric metal forming project was studied as an example. By using our simulation model, we get 581 correct real simulation results totally. According to all these real values, we build the surrogate meta-models and obtain Pareto points for a two-objective optimization process. The choice of a solution in all Pareto points will be done by the engineer who can choose his best values according to their criterions of project.

  17. Riikide ähvardamine trahviga sai europarlamendilt rohelise tule / Laura Raus ; kommenteerinud Wolf Klinz, Ivo Strejcek, Nikolaos Chountis, Ville Itälä

    Index Scriptorium Estoniae

    Raus, Laura

    2011-01-01

    Europarlament kiitis eile heaks kuue õigusakti paketi, mis annab võimaluse hakata alates 2014. aastast trahvima euroala riike, kelle majandus on tasakaalust väljas ja kes selle vastu vajalikke meetmeid ette ei võta

  18. Lokus kontrolja, ustojčivosť k stressu i ličnostnyj rost učastnikov eksperimenta „Mars-500“

    Czech Academy of Sciences Publication Activity Database

    Šolcová, Iva; Vinokhodova, A.

    2013-01-01

    Roč. 47, č. 3 (2013), s. 24-29 ISSN 0233-528X R&D Projects: GA ČR(CZ) GAP407/11/2226 Institutional support: RVO:68081740 Keywords : stress-related growth * Mars -500 * proactive coping * resilience Subject RIV: AN - Psychology

  19. Avalike veekogude koormamine kaldaga püsivalt ühendatud ehitistega : [magistritöö] / Indrek Kukk ; Tartu Ülikool, õigusteaduskond ; juhendaja: Ivo Pilving

    Index Scriptorium Estoniae

    Kukk, Indrek

    2011-01-01

    Avalike ja erahuvidega arvestamisest vette ehitamise planeerimisel, rannaalade kaitse rahvusvahelistest põhimõtetest, avaliku veekogu kaldaga püsivalt ühendatud ehitisega koomamise üldistest nõuetest

  20. Hodnocení a spotřeba živočišných tuků u pacientů s KVO a DM

    OpenAIRE

    Opravilová, Jana

    2015-01-01

    The Bachelor thesis deals with the evaluation of consumption of animal fat in patients with CVD and DM. The theoretical part deals with the distribution of lipid, lipid metabolism, the quality of each animal fats, foods containing them and their cooking. The practical part consists of a questionnaire study that tracks the incidence of animal fat and method of preparation in the diet of patients with CVD and DM. Data for this study were taken at III. Internal Medicine, 1st Faculty of Medicine....

  1. Ohrožení a chránění živočichové České republiky

    OpenAIRE

    Fraitágová, Iveta

    2011-01-01

    The aim of the present thesis is to make a survey of the development of Red Books and Lists in the Czech Republic (according to the legislation, specifically 1956 and 1992 laws and corresponding bills) which deal with animal species protection. The criteria for classification of endangered species into individual categories of the IUCN, used worldwide, and their definitions are presented; distinctions between the listing of strictly protected species in Red Books and Lists, and the one found ...

  2. Různé typy balíků biomasy po sklizni jako mikrobiotop pro bezobratlé živočichy

    OpenAIRE

    MACHOVEC, Jiří

    2013-01-01

    Epigeic beetle communities were studied on four types of biomass bales in the cadastral unit Vrbice u Žitné, district Prachatice. Involved were bales a of grass silage stored on the edge of permanent grassland, on hay bales individually placed on permanent grassland , followed by straw bales scattered in the fields of arable land and straw bales stored on the edge of arable land. The first three types of bales were in position only few months (2-3), while straw bales at the fourth position ha...

  3. O sentido da emancipação humana a partir da definição marxiana de cidadania: um diálogo com Ivo Tonet

    Directory of Open Access Journals (Sweden)

    Ricardo Pereira da Silva

    2017-02-01

    Full Text Available O propósito do presente artigo é refletir e tentar chegar a uma definição de emancipação humana a partir da definição de cidadania do ponto de vista do paradigma do materialismo histórico e dialético. Para tal trabalho, dialogamos principalmente com Tonet. Mas também com outros autores (as como Chauí, Marx, Engels, Adorno, Horkheimer, Freire, Gadotti, Arroyo, Saes e Ferreira. Nosso alvitre é aproximarmos da essência do conceito marxiano de cidadania, que está em sua natureza histórica-ontológica, isto é, no ato de fundação da sociabilidade capitalista que é a concretude da compra e venda da força de trabalho que, por sua vez, se projeta na produção de mercadorias.

  4. Flora - fra blomstergudinde i det antikke Rom over Danmark til hele verdens betegnelse for en håndbog om planter

    DEFF Research Database (Denmark)

    Friis, Ib

    2010-01-01

    Flora var en romersk gudinde for blomstring og frugtbarhed. I overensstemmelse med renæssancens genbrug af antikke guder anvendte P.G.B. Ferrari i 1633 Floras navn på en bog om havebrug og Simon Pauli kaldte i 1648 en bog om danske nyttige planter for Flora Danica, begge med reference til den rom...

  5. Andmekaitsemäärus - mis see on ja mida tähele panna? / Maarja Heinsoo, Märten Padu

    Index Scriptorium Estoniae

    Heinsoo, Maarja

    2016-01-01

    2016. aasta kevadel vastu võetud Euroopa Liidu isikuandmete kaitse üldmäärusest (General Data Protection Regulation), mis toob kaasa viimase kahekümne aasta suurima muutuse isikuandmete kaitse valdkonna reguleerimises. Rakendub alates 2018. aasta kevadest

  6. Folkloristi pilk ühele piirilõigule : vepsa ja komi rahvaluule ühisjoontest ja nende kujunemise võimalikest teedest / Kristi Salve

    Index Scriptorium Estoniae

    Salve, Kristi, 1942-

    2003-01-01

    Jälgitakse, kuidas läänemeresoome rahvaste hulka kuuluvate vepslaste ja permi rahvaste hulka kuuluvate komide lähestikkuseid asualasid ja ajaloolisi kokkupuuteid kajastab nende suuline pärimus. Kokkuvõte võru murdes lk. 165-167

  7. ”Hvis du redder et menneske, så har du reddet hele verden”. Den gode moralen og den dialogiske samtalen i et norsk klasserom

    Directory of Open Access Journals (Sweden)

    Sylvi Penne

    2009-03-01

    Full Text Available Artikkelen tar utgangspunkt i observasjoner fra et klasserom på ungdomstrinnet der elevene arbeider tverrfaglig i norsk, KRL og samfunnsfag. Temaet er blant annet jødenes situasjon før og under krigen. Læreren er faglig dyktig, erfaren og sterkt engasjert i å formidle overgrepene som ble begått mot jødene, og elevene er velvillige. Likevel er elevenes konklusjon at de i en krigssituasjon med en etisk fordring, ikke ville ha våget å gjøre noe for å hjelpe jødene.      Med utgangspunkt i diskursteori, sosiokulturell teori og nyere kognitiv teori diskuteres disse svarene som ”naturlige” svar i den konteksten som skapes i klasserommet, og gjennom det språket som elevene utfordres i, deres ”mediational means”. Et konkret didaktisk problem er at den historiske fortellingen er borte og erstattet av empatisk innlevelse. Artikkelen avslutter med å hevde at uten en narrativ ramme forsvinner muligheten for etisk erkjennelse gjennom konteksten som skapes, og gjennom materialet som foreligger. Her ligger imidlertid nye didaktiske muligheter for engasjerte lærere, ikke minst gjennom litteraturundervisning.

  8. Tudengipreemia 2012 = Student award 2012

    Index Scriptorium Estoniae

    2013-01-01

    Eesti Sisearhitektide Liidu 2012. aasta tudengipreemia pälvis Eesti Kunstiakadeemia sisearhitektuuri ja mööblidisaini üliõpilane Ivo Rannaste. EKA professor, sisearhitektuuri ja mööblidisaini osakonna juhataja Toivo Raidmets Ivo Rannastest

  9. The sweet spot of a biological hammer: the centre of percussion of glyptodont (Mammalia: Xenarthra) tail clubs.

    Science.gov (United States)

    Blanco, R Ernesto; Jones, Washington W; Rinderknecht, Andrés

    2009-11-22

    The importance of the centre of percussion (CP) of some hand-held sporting equipment (such as tennis rackets and baseball bats) for athletic performance is well known. In order to avoid injuries it is important that powerful blows are located close to the CP. Several species of glyptodont (giant armoured mammals) had tail clubs that can be modelled as rigid beams (like baseball bats) and it is generally assumed that these were useful for agonistic behaviour. However, the variation in tail club morphology among known genera suggests that a biomechanical and functional analysis of these structures could be useful. Here, we outline a novel method to determine the CP of the glyptodont tail clubs. We find that the largest species had the CP very close to the possible location of horny spikes. This is consistent with the inference that they were adapted to delivering powerful blows at that point. Our new analysis reinforces the case for agonistic use of tail clubs in several glyptodont species.

  10. The sweet spot of a biological hammer: the centre of percussion of glyptodont (Mammalia: Xenarthra) tail clubs

    OpenAIRE

    Blanco, R. Ernesto; Jones, Washington W; Rinderknecht, Andrés

    2009-01-01

    The importance of the centre of percussion (CP) of some hand-held sporting equipment (such as tennis rackets and baseball bats) for athletic performance is well known. In order to avoid injuries it is important that powerful blows are located close to the CP. Several species of glyptodont (giant armoured mammals) had tail clubs that can be modelled as rigid beams (like baseball bats) and it is generally assumed that these were useful for agonistic behaviour. However, the variation in tail clu...

  11. Ataxias cerebelares hereditárias: do martelo ao gen Hereditary cerebellar ataxias from neurological hammer to genetics

    Directory of Open Access Journals (Sweden)

    Walter Oleschko Arruda

    1997-09-01

    Full Text Available As heredoataxias constituem grupo complexo de doenças neurodegenerativas hereditárias, para o qual várias formas de classificação clínica e patológica foram propostas com sucesso variável. O desenvolvimento das técnicas de biologia molecular trouxe informações importantes que têm permitido caracterizar geneticamente as ataxias cerebelares hereditárias. O reconhecimento das doenças causadas por expansões de trinucleotídeos abre novo capítulo para a pesquisa sobre outros mecanismos de doenças, como na ataxia de Friedreich e nas várias formas de ataxia cerebelar autossômica dominante(SCAl a SCA7, das quais a doença de Machado-Joseph / SCA3 parece ser a mais comum no nosso meio. A deficiência familial de vitamina E (cromossomo 8q leva a quadro semelhante ao da ataxia de Friedreich (cromossomo 9p, mas responde à reposição oral de tocoferol. Formas familiais de ataxia periódica com (cromossomo 12p ou sem (cromossomo 19p mioquimia foram caracterizadas, a primeira resultado de mutações dos gens de canais de potássio. Os portadores do gen da ataxia-teleangiectasia (cromossomo 1 lq representam 1-3% da população e são suscetíveis aos efeitos oncogênicos da radiação iônica. Sem olvidar da importância da avaliação clínica neurológica, a avaliação genética laboratorial passa a ser valiosa ferramenta para o diagnóstico e aconselhamento genético, além do melhor entendimento da patogênese dessas doenças.The hereditary ataxias comprise a complex group of neurological disorders involving the cerebellum and its connections. Several classifications based on clinical and/or pathological data have been only partially successful. Recent progress in molecular genetics has identified the genic loci of hereditary ataxias and has allowed a more precise diagnosis of distinct genetic diseases. Trinucleotide repeat expansions has been recognized as a mechanism of disease in some autosomal dominant spinocerebellar ataxias (ADCA (SCA1 to SCA7, including Machado-Joseph disease / SCA3, probably the most common form of ADCA in South Brazil, and Friedreich ataxia (GAA expansion - chromosome 9p. Familial alpha-tocopherol deficiency (chromosome 8q may have a Friedreich ataxia phenotype and responds to the oral supplementaion with vitamin E. Familial episodic ataxias with (EA1 - chromosome 12p and without (chromosome 19p - EA2 myokimia were identified, the first one caused by point mutations in the gene encoding the KCNA1 potassium voltage-gated channel. The gene responsible for ataxia-teleangiectasia (chromosome 1 lq was found to encode a putative DNA binding protein kinase (ATM, related to the cell cycle control. One to 3% of the population are heterozygotic ATM gen carry and pose a higher risk of cancer when exposed to ionizing radiation. Molecular biology has provided us with useful tools to diagnosis and genetic counseling and, hopefully, will provide us with a better understanding of the pathogenesis and eventual treatment of the several forms of hereditary ataxias.

  12. The Olive Branch and the Hammer: A Strategic Analysis of Hawala in the Financial War on Terrorism

    Science.gov (United States)

    2008-03-01

    Islamic banking. It is a cultural aspect of Islam that can be traced back to the Prophet Mohammed, himself a trader and user of the informal economy...later…of course there are also the drug payments to Afghan traders , which depend to a large extent on in follows from Pakistan.170...in Pakistan has been greatly affected. “Hawala business is 75% gone now,” according to Malik Bostan, president of the Forex Association of

  13. Toolboxes and Handing Students a Hammer: The Effects of Cueing and Instruction on Getting Students to Think Critically

    Science.gov (United States)

    Holmes, N. G.; Kumar, Dhaneesh; Bonn, D. A.

    2017-01-01

    Developing critical thinking skills is a common goal of an undergraduate physics curriculum. How do students make sense of evidence and what do they do with it? In this study, we evaluated students' critical thinking behaviors through their written notebooks in an introductory physics laboratory course. We compared student behaviors in the…

  14. The sweet spot of a biological hammer: the centre of percussion of glyptodont (Mammalia: Xenarthra) tail clubs

    Science.gov (United States)

    Blanco, R. Ernesto; Jones, Washington W.; Rinderknecht, Andrés

    2009-01-01

    The importance of the centre of percussion (CP) of some hand-held sporting equipment (such as tennis rackets and baseball bats) for athletic performance is well known. In order to avoid injuries it is important that powerful blows are located close to the CP. Several species of glyptodont (giant armoured mammals) had tail clubs that can be modelled as rigid beams (like baseball bats) and it is generally assumed that these were useful for agonistic behaviour. However, the variation in tail club morphology among known genera suggests that a biomechanical and functional analysis of these structures could be useful. Here, we outline a novel method to determine the CP of the glyptodont tail clubs. We find that the largest species had the CP very close to the possible location of horny spikes. This is consistent with the inference that they were adapted to delivering powerful blows at that point. Our new analysis reinforces the case for agonistic use of tail clubs in several glyptodont species. PMID:19710060

  15. Toolboxes and handing students a hammer: The effects of cueing and instruction on getting students to think critically

    Directory of Open Access Journals (Sweden)

    N. G. Holmes

    2017-04-01

    Full Text Available Developing critical thinking skills is a common goal of an undergraduate physics curriculum. How do students make sense of evidence and what do they do with it? In this study, we evaluated students’ critical thinking behaviors through their written notebooks in an introductory physics laboratory course. We compared student behaviors in the Structured Quantitative Inquiry Labs (SQILabs curriculum to a control group and evaluated the fragility of these behaviors through procedural cueing. We found that the SQILabs were generally effective at improving the quality of students’ reasoning about data and making decisions from data. These improvements in reasoning and sensemaking were thwarted, however, by a procedural cue. We describe these changes in behavior through the lens of epistemological frames and task orientation, invoked by the instructional moves.

  16. Broad in-scope research project focusing on mechanised hammering of wood from thinnings; Laaja tutkimushanke harvennuspuun koneelliseen korjuuseen

    Energy Technology Data Exchange (ETDEWEB)

    Ryynaenen, S. [Work Efficiency Inst., Helsinki (Finland)

    2000-07-01

    A broad-in-scope development project, with the TTS Institute its organiser, has been launched on the theme of new mechanised harvesting alternatives for wood from thinnings. The project, spanning the period 1999-2001, has actors from all the leading research institutes, machine manufacturers and contractors in the field as well from the wood-based industries. The project is expected to produces basic information on the technical and economic alternatives of mechanised wood harvesting. Environmental considerations will also be included. (orig.)

  17. Toolboxes and handing students a hammer: The effects of cueing and instruction on getting students to think critically

    Science.gov (United States)

    Holmes, N. G.; Kumar, Dhaneesh; Bonn, D. A.

    2017-06-01

    Developing critical thinking skills is a common goal of an undergraduate physics curriculum. How do students make sense of evidence and what do they do with it? In this study, we evaluated students' critical thinking behaviors through their written notebooks in an introductory physics laboratory course. We compared student behaviors in the Structured Quantitative Inquiry Labs (SQILabs) curriculum to a control group and evaluated the fragility of these behaviors through procedural cueing. We found that the SQILabs were generally effective at improving the quality of students' reasoning about data and making decisions from data. These improvements in reasoning and sensemaking were thwarted, however, by a procedural cue. We describe these changes in behavior through the lens of epistemological frames and task orientation, invoked by the instructional moves.

  18. Pärandvara inventuuri läbiviimine kohtutäituri büroos : [bakalaureusetöö] / Heldin Toomingas ; Tartu Ülikool, õigusteaduskond ; juhendaja: Ivo Mahhov

    Index Scriptorium Estoniae

    Toomingas, Heldin, 1979-

    2013-01-01

    Pärimisest, pärandvara mõistest, pärandi vastuvõtmisest inventuuri soodustusega, nõuete esitamisest, kohtutäituri pädevusest teabe kogumisel ja kontrollimisel, vastutusest nimekirja õigsuse eest, kohtutäituri tasust pärandvara inventuuri läbiviimise eest

  19. Využití pitev bezobratlých živočichů ve výuce biologie na středních školách

    OpenAIRE

    Ondrová, Radka

    2013-01-01

    The thesis is focused on anatomy and implementation of dissections of 4 selected model invertebrates in school practice. The selected model species include swan mussel (Anodonta cygnea), stick insect (Medauroidea extradentata), cockchafer (Melolontha melolontha) and sea urchin (Echinus esculentus). In case of the cockchafer, the text is based on this model species, but the supporting photographs of dissection are taken from the tropical cetoniid beetle Pachnoda, which has very similar interna...

  20. Neonatal Phosphate Nutrition Alters in Vivo and in Vitro Satellite Cell Activity in Pigs

    Directory of Open Access Journals (Sweden)

    Chad H. Stahl

    2012-05-01

    Full Text Available Satellite cell activity is necessary for postnatal skeletal muscle growth. Severe phosphate (PO4 deficiency can alter satellite cell activity, however the role of neonatal PO4 nutrition on satellite cell biology remains obscure. Twenty-one piglets (1 day of age, 1.8 ± 0.2 kg BW were pair-fed liquid diets that were either PO4 adequate (0.9% total P, supra-adequate (1.2% total P in PO4 requirement or deficient (0.7% total P in PO4 content for 12 days. Body weight was recorded daily and blood samples collected every 6 days. At day 12, pigs were orally dosed with BrdU and 12 h later, satellite cells were isolated. Satellite cells were also cultured in vitro for 7 days to determine if PO4 nutrition alters their ability to proceed through their myogenic lineage. Dietary PO4 deficiency resulted in reduced (P < 0.05 sera PO4 and parathyroid hormone (PTH concentrations, while supra-adequate dietary PO4 improved (P < 0.05 feed conversion efficiency as compared to the PO4 adequate group. In vivo satellite cell proliferation was reduced (P < 0.05 among the PO4 deficient pigs, and these cells had altered in vitro expression of markers of myogenic progression. Further work to better understand early nutritional programming of satellite cells and the potential benefits of emphasizing early PO4 nutrition for future lean growth potential is warranted.

  1. Kulgeb ja komistab / Tõnis Mägi ; interv. Villu Tamme, Ivo Linna, Villu Kangur, Hannaliisa Uusma, Anne Veski, Mikk Targo, Chalice (Jarek Kasar), Vaiko Eplik, Jaan Ahelik, Silvi Vrait, Riho Sibul, Ramo Teder, Hendrik Sal-Saller

    Index Scriptorium Estoniae

    Mägi, Tõnis, 1948-

    2008-01-01

    Tõnis Mägi 60 - juubeliintervjuu kolleegidele (üles kirjutas Siim Nestor). Tõnis Mäe uue heliplaadi "Kiik ja kirik" esitluskontserdid toimuvad 2. dets. Jõhvi kontserdimajas, 5. dets. Pärnu kontserdimajas, 6. dets. Estonia kontserdisaalis ja 7. dets. Vanemuise kontserdimajas

  2. Mapování a analýza volně žijících živočichů v ČR

    OpenAIRE

    DOBIÁŠOVÁ, Kristýna

    2017-01-01

    Pesticides, rat control or targeted placed, poisoning bait by carbofuran. These and many other ways can cause the poisoning of a wild animal. Whether targeted poiso-ning of a particular animal poison or unintentional poisoning of a non-target individu-al occurs, this behavior has always fatal consequences. The persecution of nuisance animals, such as Foxes, Martens or other predators, has an influence on the whole of the population. Often poisoning bird of prey is a White-tailed Eagle, in whi...

  3. Overexpression of a three-gene conidial pigment biosynthetic pathway in Aspergillus nidulans reveals the first NRPS known to acetylate tryptophan.

    Science.gov (United States)

    Sung, Calvin T; Chang, Shu-Lin; Entwistle, Ruth; Ahn, Green; Lin, Tzu-Shyang; Petrova, Vessela; Yeh, Hsu-Hua; Praseuth, Mike B; Chiang, Yi-Ming; Oakley, Berl R; Wang, Clay C C

    2017-04-01

    Fungal nonribosomal peptide synthetases (NRPSs) are megasynthetases that produce cyclic and acyclic peptides. In Aspergillus nidulans, the NRPS ivoA (AN10576) has been associated with the biosynthesis of grey-brown conidiophore pigments. Another gene, ivoB (AN0231), has been demonstrated to be an N-acetyl-6-hydroxytryptophan oxidase that putatively acts downstream of IvoA. A third gene, ivoC, has also been predicted to be involved in pigment biosynthesis based on publicly available genomic and transcriptomic information. In this paper, we report the replacement of the promoters of the ivoA, ivoB, and ivoC genes with the inducible promoter alcA in a single cotransformation. Co-overexpression of the three genes resulted in the production of a dark-brown pigment in hyphae. In addition, overexpression of each of the Ivo genes, ivoA-C, individually or in combination, allowed us to isolate intermediates and confirm the function of each gene. IvoA was found to be the first known NRPS to carry out the acetylation of the amino acid, tryptophan. Copyright © 2017 Elsevier Inc. All rights reserved.

  4. The gas turbine - a bundle of energy - requires tender care

    Energy Technology Data Exchange (ETDEWEB)

    Saarinen, J.; Uronen, J.; Leisio, C. [ed.

    1997-11-01

    The ability of a power plant to generate energy economically depends to a great extent on the functioning of the turbine. These days, an increasingly large number of these power plant `motors` are gas turbines. IVO`s expertise in the operation, maintenance and repair of gas turbines is based on long practical experience and the company`s own research. And IVO is also no stranger to the design and construction of new gas turbine plants

  5. Don’t Use a Hammer When You Need a Screwdriver: How to Use the Right Tools to Create Assessment That Matters

    Directory of Open Access Journals (Sweden)

    Dominique Turnbow

    2016-12-01

    Full Text Available Instruction librarians want clear data showing the effectiveness of our workshops as a way of demonstrating our value in education. This article uses instructional design approaches to show how to make specific changes when writing and measuring our learning outcomes to capture what we are doing in our sessions. Unlike classes that develop over the course of several months, we are faced with unique challenges when conducting one-shot instruction sessions. By focusing our attention on student satisfaction and learning, we see ways to improve those sessions for everyone involved. In this essay, we provide examples and discuss how to write effective learning outcomes to answer specific questions about learner satisfaction and what the participants learned. In addition, we suggest ways to reform the evaluation and assessment questions that we use to reinforce our lessons. These methods can be used in both online and face-to-face environments.

  6. Applying SE Methods Achieves Project Success to Evaluate Hammer and Fixed Cutter Grinders Using Multiple Varieties and Moistures of Biomass Feedstock for Ethanol Production

    Energy Technology Data Exchange (ETDEWEB)

    Larry R. Zirker; Christopher T. Wright, PhD; R. Douglas Hamelin

    2008-06-01

    Applying basic systems engineering (SE) tools to the mission analysis phases of a 2.5-million dollar biomass pre-processing project for the U.S. Department of Energy directly assisted the project principal investigator understand the complexity and identify the gaps of a moving-target project and capture the undefined technical/functional requirements and deliverables from the project team and industrial partners. A creative application of various SE tools by non-aerospace systems engineers developed an innovative “big picture” product that combined aspects of mission analysis with a project functional flow block diagram, providing immediate understanding of the depth and breath of the biomass preprocessing effort for all team members, customers, and industrial partners. The “big picture” diagram became the blue print to write the project test plan, and provided direction to bring the project back on track and achieve project success.

  7. Falling hammer use evaluation for hot deformation hardness testing; Avaliacao do uso de um martelo de queda, para a determinacao da resistencia a deformacao a quente

    Energy Technology Data Exchange (ETDEWEB)

    Beck, J.C.P.C.; Cauduro, Carlos R.; Schaeffer, Lirio [Rio Grande do Sul Univ., Porto Alegre, RS (Brazil)

    1990-12-31

    This work performs a evaluation of the characteristics hot leaking of a 8620 stainless steel, deformed at 870 deg C. The tools associated with the measurements was described and a comparison between the theoretical values and the values experimentally obtained from the performed tests. 5 figs., 3 refs.

  8. Noorte uimastikäitumise perekondlikest tagamaadest : [küsitlusuuringu ESPAD ja elanikkonnaküsitluse "Eesti 98" andmetel] / Kati Hammer-Pratka

    Index Scriptorium Estoniae

    Hammer-Pratka, Kati

    2001-01-01

    Artiklis uuritakse noorte uimastikäitumise võimalikke perekondlikke mõjutegureid. Analüüsitakse teismeliste laste vanemate seotust alkoholi, suitsetamise ja narkootikumidega ning nende riskitunnetust uimastite tarbimise suhtes. Kasutatud on kahe küsitluse - 1999.a. Euroopa Kooliõpilaste Alkoholi ja Narkootikumide Kasutamise Küsitlusuuringu (ESPAD, viidi läbi 20 riigis) ja elanikkonnaküsitluse "Eesti '98" materjale

  9. "If Your Only Tool Is a Hammer, Any Issue Will Look like a Nail": Building Conflict Resolution and Mediation Capacity in South African Universities

    Science.gov (United States)

    Harris, Geoff

    2008-01-01

    This article commences with an explanation of some of the technical terms in the field of conflict resolution. It then examines the common ways which parties to a conflict use in an effort to deal with it and concludes that, on a number of criteria, collaborative conflict resolution is the superior method. Using some representative examples of…

  10. If All You Have Is a Hammer, Everything Begins to Look Like a Nail--How Wicked Is the Problem of Measuring Productivity in Higher Education?

    Science.gov (United States)

    Drengenberg, Nicholas; Bain, Alan

    2017-01-01

    This paper addresses the wicked problem of measuring the productivity of learning and teaching in higher education. We show how fundamental validity issues and difficulties identified in educational productivity research point to the need for a qualitatively different framework when considering the entire question. We describe the work that needs…

  11. Noored naised teevad järjest vähem aborte / Maike Parve ; intervjueerinud Tiina Jõgeda

    Index Scriptorium Estoniae

    Parve, Maike, 1950-

    1998-01-01

    Raseduse katkestamise ja steriliseerimise seaduse eelnõust. Lisatud sotsiaalminister Tiiu Aro, Erakliiniku Fertilitas juhataja Ivo Saarma ja Tartu Ülikooli naistekliiniku juhataja Helle Karro arvamused

  12. Logistik- og Lean-Costing - når der skal være transparens i økonomistyringen, og omkostninger skal minimeres over hele forsyningskæden

    DEFF Research Database (Denmark)

    Nielsen, Steen

    2004-01-01

    Først belyses de muligheder som ligger i at integrere virksomhedens økonomiske styring med begrebet Supply Chain Management (SCM). Dette søges belyst ved først at beskrive den teoretiske ramme hvori SCM indgår. Herefter analyseres begrebet Supply Chain Costing (SCC) som prøver at integrere SCM med...... de økonomiske forhold. Herefter gives et bud på hvordan lønsomhedsformålet kunne udtrykkes når relationen mellem juridisk selvstændige parter skal gøres op. Via begrebet Supply Chain Costing skabes der mulighed for at måle logistikkædens aktiviteter i kr./øre. Anvendelsen af denne information har...... også strategisk betydning til at kunne vælge kunde og leverandør. Ved hjælp af integrationen skabes der også helt nye mulighed for at vurdere forskellige performance og targets fremover til gavn for leverandør og kunde....

  13. Die woord van God as lewende, kragtige en tweesnydende sward - 'n studie van hebreërs 4:12-13 binne die konteks van die hele Hebreërs

    Directory of Open Access Journals (Sweden)

    J.C. Coetzee

    1988-03-01

    Full Text Available Within the wider scope of interdisciplinary studies on The Power of the Word of God this article gives a New Testament perspective on the theme through an exegetical study of Hebrews 4:12-13 within its broader context. Whilst this pericope is often used as a prooftext (locum probantium for the divine authority of Scriptures this study starts on the as­ sumption that this is not the primary focus of the text. It is as­ sumed that the text is primarily concerned with the effective power of God's Word in the lives of men, especially In the lives of members of God's people. Four hypotheses are stated at the beginning and are exegetically tested in the article: (i In the whole Bible Hebrews 4:12-13 is one of the clearest and most compact expressions of the dynamic power of the Word of God. (ii Hebrews 4:12-13 is indeed a cornerstone in the message of this sermon to "the Hebrews". (HI Although various Biblical passages seemingly have strong parallels on the matter of the power of the Word Hebrews 4:12-13 proves to have a singular emphasis, namely of the living, powerful and the decisively penetrating power of JUDGE of the deepest heart of man. (iv Hebrews 4:12-13 within its context gives an important portrait of the most intimate relation between the Word of God and the God of the Word.

  14. Vi er med hele vejen – En kvalitativ undersøgelse om at være pårørende til patienter med kronisk nyresygdom

    DEFF Research Database (Denmark)

    Agnholt, Hanne; Kristiansen, Jette; Pedersen, Mona Kyndi

    2017-01-01

    : Relatives provided substantial support to the patient both in everyday life and in care and treatment, and it was a constant challenge to find a balance between being supportive and taking over. Conclusion: Relatives expressed a need for recognition in everyday life and by the healthcare professionals...

  15. Internet-Based System for Voice Communication With the ISS

    Science.gov (United States)

    Chamberlain, James; Myers, Gerry; Clem, David; Speir, Terri

    2005-01-01

    The Internet Voice Distribution System (IVoDS) is a voice-communication system that comprises mainly computer hardware and software. The IVoDS was developed to supplement and eventually replace the Enhanced Voice Distribution System (EVoDS), which, heretofore, has constituted the terrestrial subsystem of a system for voice communications among crewmembers of the International Space Station (ISS), workers at the Payloads Operations Center at Marshall Space Flight Center, principal investigators at diverse locations who are responsible for specific payloads, and others. The IVoDS utilizes a communication infrastructure of NASA and NASArelated intranets in addition to, as its name suggests, the Internet. Whereas the EVoDS utilizes traditional circuitswitched telephony, the IVoDS is a packet-data system that utilizes a voice over Internet protocol (VOIP). Relative to the EVoDS, the IVoDS offers advantages of greater flexibility and lower cost for expansion and reconfiguration. The IVoDS is an extended version of a commercial Internet-based voice conferencing system that enables each user to participate in only one conference at a time. In the IVoDS, a user can receive audio from as many as eight conferences simultaneously while sending audio to one of them. The IVoDS also incorporates administrative controls, beyond those of the commercial system, that provide greater security and control of the capabilities and authorizations for talking and listening afforded to each user.

  16. Kontrastõ ot Baltika Grupp / Jana Kuvaitseva

    Index Scriptorium Estoniae

    Kuvaitseva, Jana

    2007-01-01

    Eesti rõivatootja Baltika Grupp uutest sügis-talvistest kollektsioonidest räägivad Montoni kaubamärgi disainerid Jaanika Sootna ja Evelin Lill ning Ivo Nikkolo kaubamärgi disainer Eve Hanson. Baltika kaubamärgid on Monton, Mosaic, Baltman ja Ivo Nikkolo

  17. Osennaja moda : tshornõm-tshorno

    Index Scriptorium Estoniae

    2008-01-01

    Baltika kaubamärkide Monton, Ivo Nikkolo, Baltman ja Mosaic moekollektsioonidest sügiseks 2008. Tutvustavad Montoni naisterõivatse disainer Jaanika Sootna ning meesterõivaste disainer Jaana Varkki, Ivo Nikkolo disainer Eve Hanson, Baltmani disainer Erkki Engso ja Mosaici naisterõivaste disainer Evelin Lill ning meesterõivaste disainer Merle Lõhmus. Värvifotod

  18. Triumfalnoje vozvrashtshenije 60-h / Airika Soome, Jaanika Sootna, Merike Pääro...[jt.] ; interv. Valeria Aru

    Index Scriptorium Estoniae

    2007-01-01

    Eesti tuntuimate kaubamärkide PTA, Monton, Bastion, Ivo Nikkolo ja Mosaic moekunstnike nägemused moest kevad-suveks 2007. PTA - Airika Soome, Monton - Jaanika Sootna, Bastion - Merike Pääro, Ivo Nikkolo - Eve Hanson ja Mosaic - Evelin Lill

  19. Tallinna kaubandusbilanss 17. sajandil / Enn Küng

    Index Scriptorium Estoniae

    Küng, Enn, 1963-

    2015-01-01

    Mida kujutas endast portooriumitoll. Artikkel on katse uurida kaubandusbilanssi, tuginedes ainult ühele konkreetsele allikaliigile - peaaegu kogu 17. sajandi ulatuses säilinud portooriumitolliraamatutele

  20. Distant Relations

    DEFF Research Database (Denmark)

    Søndergaard, Morten

    2011-01-01

    Art EntrepreneurshipIvo Zander Mikael Scherdin This project is funded and sponsored by the Knowledge Foundation, the Bank of Sweden Tercentenary Foundation, and the Department of Business Studies, Uppsala University2008-2009This cutting edge project asks what art and artistic processes can contri......) Entrepreneurship on the art arena - An ecological perspective (Mikael Scherdin and Ivo Zander) Distant relations - Art practice in a global culture (Morten Søndergaard) Art entrepreneurship - A commentary (Daved Barry) Summary and policy implications (Mikael Scherdin and Ivo Zander)...

  1. Small scale power production

    Energy Technology Data Exchange (ETDEWEB)

    Muoniovaara, M. [IVO International Ltd, Vantaa (Finland)

    1996-12-31

    IVO International is a major constructor of biomass power plants in Finland and abroad. As a subsidiary of Imatran Voima Oy, the largest power utility in Finland, it has designed and constructed ten power plants owned by IVO Group or others capable of burning biomasses. Sizes of the plants vary from the world`s largest condensing peat-fired power plant of 155 MWe to a 6 MWe combined heat and power producing unit. This article describes the biomass power plants designed and constructed by IVO Group 3 refs.

  2. Hodnocení vlivů na životní prostředí {--} případová studie. Sukcese vybraných druhů organismů (rostlin a živočichů) na náspech železničního koridoru v lokalitě Vomáčka.

    OpenAIRE

    MÜLLEROVÁ, Tereza

    2007-01-01

    The biodiversity of vascular plants and invertebrates (beetles) was studied on the strips by the railway track during two years in South Bohemia. The phytocenological mapping and pitfall trapping was used for the studying of model groups. The biodiversity of both studied groups was relatively high with different ecological characteristic of its communities. The both hygrophilous and xerophilous species occur in locality. The ubiquitous eurytopic species of beetles prevail in communities, but ...

  3. Vzorové příklady bezobratlých živočichů v učebnicích základních a středních škol

    OpenAIRE

    Beránková, Alena

    2014-01-01

    The main purpose of this Bachelor thesis is introduce and analyse types of textbooks for primary and high schools. Textbook is important didactic mean, so is necessary good and well division, and suitable in picture and text section. The work is divided into several parts. At first we focus on introduction model species of invertebrates in textbooks. In other part it focus on meanings and function of textbooks. In the third section are textbooks with description of their suitability for learn...

  4. Tükk demokraatlikku arhitektuuri / Karin Paulus

    Index Scriptorium Estoniae

    Paulus, Karin, 1975-

    2008-01-01

    Taani firma Schmidt Hammer Lassen Architects koostab Tallinnasse Paljassaare poolsaarele kavandatava ECOBAY-linnaku planeeringut. Projekti kontseptsiooni kirjeldus. Taani projekteerimisfirma iseloomustus. Asutajad Morten Schmidt, Bjarne Hammer, John Lassen. Morten Holmi kommentaar

  5. Controllable seismic source

    Energy Technology Data Exchange (ETDEWEB)

    Gomez, Antonio; DeRego, Paul Jeffrey; Ferrell, Patrick Andrew; Thom, Robert Anthony; Trujillo, Joshua J.; Herridge, Brian

    2015-09-29

    An apparatus for generating seismic waves includes a housing, a strike surface within the housing, and a hammer movably disposed within the housing. An actuator induces a striking motion in the hammer such that the hammer impacts the strike surface as part of the striking motion. The actuator is selectively adjustable to change characteristics of the striking motion and characteristics of seismic waves generated by the impact. The hammer may be modified to change the physical characteristics of the hammer, thereby changing characteristics of seismic waves generated by the hammer. The hammer may be disposed within a removable shock cavity, and the apparatus may include two hammers and two shock cavities positioned symmetrically about a center of the apparatus.

  6. Controllable seismic source

    Energy Technology Data Exchange (ETDEWEB)

    Gomez, Antonio; DeRego, Paul Jeffrey; Ferrel, Patrick Andrew; Thom, Robert Anthony; Trujillo, Joshua J.; Herridge, Brian

    2014-08-19

    An apparatus for generating seismic waves includes a housing, a strike surface within the housing, and a hammer movably disposed within the housing. An actuator induces a striking motion in the hammer such that the hammer impacts the strike surface as part of the striking motion. The actuator is selectively adjustable to change characteristics of the striking motion and characteristics of seismic waves generated by the impact. The hammer may be modified to change the physical characteristics of the hammer, thereby changing characteristics of seismic waves generated by the hammer. The hammer may be disposed within a removable shock cavity, and the apparatus may include two hammers and two shock cavities positioned symmetrically about a center of the apparatus.

  7. DEFINITION OF CAUSES OF DESTRUCTION OF KNIVES FOR THE CHOPPING OF SCRAP METAL ON RS-1200 PRESS SCISSORS IN DROP-HAMMER PLANT OF THE JSC «BELARUSIAN STEEL WORKS – MANAGEMENT COMPANY OF HOLDING «BMС»

    Directory of Open Access Journals (Sweden)

    I. A. Kovaleva

    2016-01-01

    Full Text Available Researches of the reasons of broken knives for the chopping of scrap metal of RS-1200 press scissors are conducted, the reasons of breakage are defined and it is established that premature failure of knives is connected with low values of hardness steel which have been a result of violations of technology of heat treatment at the producer’ plant.

  8. El contragolpe generado en el oído interno como etiopatogenia de la enfermedad de Méniére Water Hammer impact on the internal ear in the pathogenesis of Méniére's disease

    OpenAIRE

    William Alvarez Gaviria

    1992-01-01

    Se postula la hipótesis de que una de las funciones del saco endolinfático es hacer las veces de amortiguador de los contragolpes generados en el oído interno, como respuesta a las desaceleraciones súbitas ocasionadas en los Iíquidos laberínticos por el cambio o el frenado súbito de los movimientos. Si dicho amortiguador no reúne las condiciones suficientes para tal efecto como, por ejemplo, capacidad volumétrica y orientación adecuada, ...

  9. Elektrijaht köidab kaht Ühendriikide firmat / Argo Ideon, Urmas Tooming

    Index Scriptorium Estoniae

    Ideon, Argo, 1966-

    1998-01-01

    NRG Energy läbirääkimised Eesti Elektrijaamade erastamiseks kestavad. USA firma Cinergy Corporation tegi pakkumise AS-i Narva Elektrivõrk 49% aktsiate ostmiseks, konkurents Soome firmaga IVO. Skeem: USA energiahaid Narvas

  10. Na dvore zima, na podiume leto / Vladimir Zaitsev

    Index Scriptorium Estoniae

    Zaitsev, Vladimir

    2006-01-01

    Riias toimunud moenädalast Riga Fashion Week. Näidati kollektsioone kevad-suveks 2007. Osalesid moekunstnikud Baltimaadest, Itaaliast ja Venemaalt. Eestit esindasid Oksana Tandit, Riina Põldroos ja Ivo Nikkolo ja firma Sangar

  11. "Hair" - laul ja tants, mitte kultusmuusikal / Andris Feldmanis

    Index Scriptorium Estoniae

    Feldmanis, Andris, 1982-

    2006-01-01

    Kultusmuusikal "Hair" Rock Cafés Georg Otsa nim. Tallinna Muusikakooli õpilaste esituses, lavastaja Ivo Eensalu, muusikajuhid Mare Väljataga, Meelis Punder, tantsujuht Ulrike Ustav, kunstnikud Kristel Viks, Liisi Suuroja

  12. Lähte mehed ehitavad 1,5 miljonit maksvaid kaatreid / Anti Ronk

    Index Scriptorium Estoniae

    Ronk, Anti

    2004-01-01

    Klassikalise disainiga plastkaatri Arthur 26 WA projekteerimist ja valmistamist tutvustavad Tartumaa ettevõtete OÜ Arthuri Paat tegevdirektor Ivo Venta ja OÜ Klassik Paat tegevdirektor Jüri Jõul. Lisa: Kaatri näitajad

  13. Uued plaadid

    Index Scriptorium Estoniae

    1999-01-01

    Uutest heliplaatidest Ivo Linna & Rock Hotel "Kõva ketas", Hendrik Sal-Saller "1994-1996", Chemical Brothers "Surrender", Mike & The Mechanics "M6", Bomfunk Mc"s "In Stereo", Jamiroquai "Synkronized"

  14. [Tutvustus doktoritööle

    Index Scriptorium Estoniae

    2006-01-01

    Tutv. rmt.: Pilving, Ivo. Haldusakti siduvus : uurimus kehtiva haldusakti õiguslikust tähendusest rõhuasetusega avalik-õiguslikel lubadel : [doktoritöö] / Tartu Ülikool, õigusteaduskond ; juhendaja: Kalle Merusk. Tartu : Tartu Ülikooli Kirjastus, 2006

  15. Milline kevad tuleb? / Kätlin Karik

    Index Scriptorium Estoniae

    Karik, Kätlin

    2016-01-01

    Oma kevadisi rõivakollektsioone tutvustavad Ülle Pohjanheimo, Ivo Nikkolo, Althea/Thea Pilvet, Roberta Einer, Monton, Aldo Järvsoo, Ketlin Bachmann, Riina Põldroos, Kriss Soonik, Tiina by Tiina/Tiina Talumees, Iris Janvier

  16. Eesti mood esitles end Stockholmis / Peep Sooman

    Index Scriptorium Estoniae

    Sooman, Peep, 1978-

    1999-01-01

    Eesti moepäevadel Stockholmis esitleti moeshow'l üle 80 rõivakollektsiooni, osalesid: Baltika, Klementi, Sangar, Zik-Zak (Ivo Nikkolo), Katrin Kuldma Moemaja, Arne Studio, Hipo, Uljas & Tütred, Virulane, Althea.

  17. Lehm lüpsab suust... / Heli Lehtsaar

    Index Scriptorium Estoniae

    Lehtsaar, Heli, 1976-

    2015-01-01

    Lüpsikarja söötmise kogemusi jagavad Piirsalu Põllumajanduse OÜ juht Elvo Leppmaa, OÜ Halinga loomakasvatusjuht Karin Feldmann, OÜ Kehtna Mõis juhataja Märt Riisenberg, Rotaks-R müügijuht Ivo Randveer

  18. Svjaz : s obshtshestvennostju ili s korruptsijei? / Virkko Lepassalu

    Index Scriptorium Estoniae

    Lepassalu, Virkko, 1971-

    2008-01-01

    Randvere tee detailplaneeringu lugu ja selle võimalik seos Tallinna abilinnapea nõuniku Ivo Parbuse korruptsioonisüüdistusega. Piir korruptsiooni ja seadusliku tegevuse vahel võib olla eristamatu. Lisa: Spravka "DD"

  19. Plaat : Pop & Rock, Õlu, Crossover, Klassika

    Index Scriptorium Estoniae

    1999-01-01

    Uutest heliplaatidest. Eesti plaadid : Ivo Linna & Rock Hotel "Kõva ketas", Väikeste Lõõtspillide Ühing "See terve ilm on imelik", Kuldsed Lindid "Ootamatud sõnad", Laine Mustasaar "Naise elu ja armastus"

  20. Mis on maailma kõrgeima mäe nimi? / Tiit Pruuli

    Index Scriptorium Estoniae

    Pruuli, Tiit, 1965-

    2006-01-01

    Autor võrdleb kahte raamatut eestlaste edukast Džomolungma-ekspeditsioonist - Raivo Plumeri ja Tõivo Sarmeti "Everesti päevikut" ning Ivo Parbuse raamatuks koondatud intervjuusid Alar Sikuga "Teekond tippu"

  1. Kelgu uued koerad / Inge Pitsner

    Index Scriptorium Estoniae

    Pitsner, Inge

    2007-01-01

    Eesti omamaise krimiseriaali võtetel Pirital. Osalevad produtsent Toomas Kirss, näitlejad Ivo Uukkivi, Madis Milling, Mait Malmsten, Karin Rask, Britta Vahur. Lisatud lühiintervjuud Karin Raski ja Britta Vahuriga

  2. Eesti moekunstnik kõrgelt ei lenda / Indrek Stahl

    Index Scriptorium Estoniae

    Stahl, Indrek

    1999-01-01

    Bastioni omanik I. Stahl arvab, et Eestis ei ole ühelgi moekunstnikul lootust tõusta tähtnimeks. Disaineri müügiedu alusest Eestis. Ainult omatoodangut teevad Eestis Arne Niit, Ivo Nikkolo, Bastion.

  3. Autoäris on tähtsad tutvused / Tarmo Linnamäe

    Index Scriptorium Estoniae

    Linnamäe, Tarmo

    2004-01-01

    Kasutatud autode maaletoomise ja müügiga tegeleva OÜ Võru Autoaed juht Ivo Ossis ettevõtte arengust, tegevusest ja tulevikuplaanidest. Võrumaa ettevõtete TOP-i III koht. Diagramm: Prognoosides tagasihoidlik

  4. Advisor arrested on corruption charges / Matt Withers

    Index Scriptorium Estoniae

    Withers, Matt

    2008-01-01

    Tallinna abilinnapea nõunik Ivo Parbus vahistati kahtlustatuna pistise võtmises. Justiitsministeeriumi avalike suhete juhi Ivi Papsteli sõnul näitavad sagedased korruptsioonisüüdistused, et riik tegeleb korruptsioonivastase võitlusega

  5. Linear and volumetric dimensional changes of injection-molded PMMA denture base resins.

    Science.gov (United States)

    El Bahra, Shadi; Ludwig, Klaus; Samran, Abdulaziz; Freitag-Wolf, Sandra; Kern, Matthias

    2013-11-01

    The aim of this study was to evaluate the linear and volumetric dimensional changes of six denture base resins processed by their corresponding injection-molding systems at 3 time intervals of water storage. Two heat-curing (SR Ivocap Hi Impact and Lucitone 199) and four auto-curing (IvoBase Hybrid, IvoBase Hi Impact, PalaXpress, and Futura Gen) acrylic resins were used with their specific injection-molding technique to fabricate 6 specimens of each material. Linear and volumetric dimensional changes were determined by means of a digital caliper and an electronic hydrostatic balance, respectively, after water storage of 1, 30, or 90 days. Means and standard deviations of linear and volumetric dimensional changes were calculated in percentage (%). Statistical analysis was done using Student's and Welch's t tests with Bonferroni-Holm correction for multiple comparisons (α=0.05). Statistically significant differences in linear dimensional changes between resins were demonstrated at all three time intervals of water immersion (p≤0.05), with exception of the following comparisons which showed no significant difference: IvoBase Hi Impact/SR Ivocap Hi Impact and PalaXpress/Lucitone 199 after 1 day, Futura Gen/PalaXpress and PalaXpress/Lucitone 199 after 30 days, and IvoBase Hybrid/IvoBase Hi Impact after 90 days. Also, statistically significant differences in volumetric dimensional changes between resins were found at all three time intervals of water immersion (p≤0.05), with exception of the comparison between PalaXpress and Futura Gen. Denture base resins (IvoBase Hybrid and IvoBase Hi Impact) processed by the new injection-molding system (IvoBase), revealed superior dimensional precision. Copyright © 2013 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.

  6. Electric heating provides a high level of home comfort - economically

    Energy Technology Data Exchange (ETDEWEB)

    Haapakoski, M.

    1997-11-01

    Research and development at IVO in the area of electric heating boasts a tradition going back almost thirty years. Research aimed at further progress is continuing. IVO and power companies launched the `Electrically heated houses of the century` project four years ago. The first results show that electric heating continues to be very competitive with other heating systems. It is an economical way of heating the home and it also increases the comfort of those living there

  7. Tiden arbejder for os

    DEFF Research Database (Denmark)

    Larsen, Chris Holmsted

    Fra 1965 til 1975 rasede en af de blodigste konflikter under hele den kolde krig, Vietnamkrigen. Konflikten fik varige konsekvenser for hele den vestlige verden, og faldt sammen med et turbulent årti præget af ungdomsoprør og venstredrejning. Denne bog handler om krigens indtog i det danske samfu...

  8. Onderzoekers foerageren ook

    NARCIS (Netherlands)

    Blacquiere, T.

    2012-01-01

    Het is mei. Tenzij het regent, zijn de bijen de hele lange dag aan het zoeken en binnenhalen van nectar, stuifmeel, propolis, water. Dat foerageren gebeurt om te voorzien in de behoeften van het hele bijenvolk op dít moment: als het heet is moet er meteen water worden gehaald om het volk te koelen.

  9. Pierre Bourdieu. En introduktion

    DEFF Research Database (Denmark)

    Prieur, Annick; Sestoft, Carsten

    Bogen dækker hele Bourdieus forfatterskab og giver en loyal fremstilling af hans hovedværker og centrale begreber.......Bogen dækker hele Bourdieus forfatterskab og giver en loyal fremstilling af hans hovedværker og centrale begreber....

  10. Synteserapport & 1. Indenrigspolitiske forhold i Den Islamiske Republik Iran

    DEFF Research Database (Denmark)

    Pedersen, Claus Valling

    Rapport til Udenrigsministeriet om de indenrigspolitiske forhold i Iran samt et syntese af hele rapporten: Iran som regional og international medspiller i den globale verdensorden samt Irans indenrigspolitik......Rapport til Udenrigsministeriet om de indenrigspolitiske forhold i Iran samt et syntese af hele rapporten: Iran som regional og international medspiller i den globale verdensorden samt Irans indenrigspolitik...

  11. Theatrum Mundi: Odin Teatret's Ur-Hamlet

    DEFF Research Database (Denmark)

    Christoffersen, Erik Exe

    2008-01-01

    Analyse af Odin Teatrets forestilling Ur-Hamlet opført på Kronborg 2006 med 100 medvirkende fra hele verden.......Analyse af Odin Teatrets forestilling Ur-Hamlet opført på Kronborg 2006 med 100 medvirkende fra hele verden....

  12. UIE SUI().AFRIKAA~SE ~OTORFIETSKORJ>S

    African Journals Online (AJOL)

    gaande geraak oar die heerlike kerrie en rys wat. 16 deur 'n Griek aan hulle verkoop is. Verskeie soorte sitrusvrugte was verkrygbaar, terwyl die maak van vetkoeke uitgeloop het op 'n hele paar aanvalle van slegte spysvertering. Van laat slaap was daar ook geen sprake nie. Elke oggend om vyf-uur is die hele kamp gewek.

  13. Ideudvikling ved kreativ innovation

    DEFF Research Database (Denmark)

    Sejer Jakobsen, Henning; Rebsdorf, S.O.

    og brugbar forståelse af hele skabelsesprocessen. Idestigen med Tanke - Ide - Løsning er hele grundlaget, og med introduktionen til Creative Idea Solution (CIS) gives læseren en konkret model for, hvordan en proces på grænsen af kaos kan blive til en kontrolleret forandringsproces. Det normative...

  14. Multi-laboratory precision of Marshall design related tests

    CSIR Research Space (South Africa)

    Denneman, E

    2008-07-01

    Full Text Available components using the 75 blow Marshall compaction effort. The precision has been relatively stable over the years, Cassidy et al (1994) reported that the multi-laboratory CV for air voids range from 20 to 35 per cent for nine years of AMRL proficiency... by one laboratory. The major differences between the hammers were the number of blows per minute, type of release mechanism of hammer, size of counter weight on top of hammer, total weight of hammer as well as the way the hammers were bolted...

  15. Critical force during tethered swimming for the evaluation of aerobic capacity and prediction of performances in freestyle swimming

    Directory of Open Access Journals (Sweden)

    Marcelo Papoti

    2010-01-01

    Full Text Available The present study investigated the relationship of critical force (Fcrit with lactate threshold (LLNA and the intensity corresponding to VO2max (iVO2max in tethered swimming (TS, and their correlation with maximal performance in 400-m (V400 and 30-min (VT30 freestyle swimming (FS. Seven swimmers were submitted to a TS incremental test for the determination of LLNA and iVO2max. For the determination of Fcrit, the swimmers performed four exercises to exhaustion at intensities (F corresponding to 87%, 104%, 118% and 134% of iVO2max for the calculation of time limits (Tlim. Fcrit corresponded to the linear coefficient of the ratio between F and 1/tlim. The maximal performance in FS corresponded to the mean velocity obtained during maximal exercise of 400-m and 30-min crawl swimming. Fcrit (51.97 ± 4.02 N was significantly lower than iVO2max (60.21 ± 8.73 N but not than LLNA (45.89 ± 8.73. Fcrit was significantly correlated with iVO2max (0.97, LLNA (0.88, V400 (0.85, and VT30 (0.86. These data suggest that Fcrit can be used for the determination of aerobic capacity, prescription of a TS training program, and prediction of performance in FS.

  16. Improved virtual orbital multireference Møller-Plesset study of the ground and excited electronic states of protonated acetylene, C2H3+

    Science.gov (United States)

    Chaudhuri, Rajat K.; Freed, Karl F.

    2008-08-01

    The ground state geometries and associated normal mode frequencies of the classical and nonclassical protonated acetylene ion, i.e., the vinyl cation C2H3+, are computed using the complete active space self-consistent field and improved virtual orbital (IVO) complete active space configuration interaction methods. In addition, the minimum-energy reaction path for the classical to nonclassical interconversion is determined (as are excitation energies) using the IVO modification of multireference Møller-Plesset (MRMP) perturbation theory. The IVO-MRMP treatment predicts the nonclassical structure to be 4.8 kcal/mol more stable than the classical one, which is consistent with other high level theoretical estimates. The proton affinity of acetylene from the IVO-MRMP treatment (154.8 kcal/mol) also agrees well with experiment (153.3 kcal/mol) and with earlier CASPT2 calculations (154.8 kcal/mol). We further report geometries and vibrational frequencies of low lying excited states of C2H3+, which have not been observed and/or studied before. Comparisons with previous highly correlated calculations further demonstrate the computational efficiency of the IVO-MRPT methods.

  17. Improved virtual orbitals in state specific multireference perturbation theory for prototypes of quasidegenerate electronic structure

    Science.gov (United States)

    Sinha Ray, Suvonil; Ghosh, Pradipta; Chaudhuri, Rajat K.; Chattopadhyay, Sudip

    2017-02-01

    The state-specific multireference perturbation theory (SSMRPT) with an improved virtual orbital complete active space configuration interaction (IVO-CASCI) reference function [called as IVO-SSMRPT] is used to investigate the energy surface, geometrical parameters, molecular properties of spectroscopic interest for the systems/situations [such as BeH2, BeCH2, MgCH2, Si2H4, unimolecular dissociation of H2CO, and intramolecular reaction pathways of 1,3-butadiene] where the effect of quasidegeneracy cannot be neglected. The merit of using the IVO-CASCI rather than complete active space self-consistent field (CASSCF) is that it is free from iterations beyond those in the initial SCF calculation and the convergence difficulties that plague CASSCF calculations with increasing size of the CAS. While IVO-CASCI describes the non-dynamical correlation, the SSMRPT scheme is a good second-order perturbative approximation to account for the rest of the correlation energy. Our IVO-SSMRPT method is instrumental in avoiding intruder states in an size-extensive manner and allows the revision of the content of wave function in the model space. It can treat model as well as real systems with predictive accuracy, as is evident from the fairly nice accordance between our estimates, and high-level theoretical results. Our estimates also corroborate well with some experimental findings.

  18. TDS-Eh graph analysis: a new water quality index and rural water supply implications of a river affected by mining in south-eastern Nigeria

    Science.gov (United States)

    Ezekwe, I. C.; Aisubeogun, A. O.; Chima, G. N.; Odubo, E.

    2012-03-01

    The Ivo River Basin of south-eastern Nigeria is a water scarce and mining region, which suffers from water scarcity. The influence of mining activities on the quality of the Ivo River and its capacity for community water supply was investigated. Also the efficacy of TDS-Eh graph in explaining water quality was presented. Results indicated that the TDS-Eh graph highlights subtle chemical relationships which control water quality and provide a simple but generic pollution index for rapid water quality assessment. It was also discovered that the Ivo River could become an adequate alternative to groundwater as a source of rural water supply in the study area with an estimated average daily discharge of 6726000 L and a rural population of less than 200000 persons. The Ivo River meets the WHO drinking water standards in 20 physicochemical water quality parameters (pH, temperature, conductivity, turbidity, salinity, TDS, Eh, alkalinity, chloride, nitrate, sulfate, phosphate, calcium, magnesium, iron, manganese, zinc, lead and cadmium) analyzed and can therefore (with little treatment) provide up to 133.4% of average community water demand and 83.8% of maximum community water demand. The impact of mining on Ivo River quality was found to have been moderated by the presence of carbonate rocks which may have enhanced the precipitation of heavy metals from the river.

  19. Development of a feeding device for solid material; Kiinteaen materiaalin syoettoelaitteen kehittaeminen

    Energy Technology Data Exchange (ETDEWEB)

    Heinonen, O.; Tiihonen, J. [Imatran Voima Oy, Vantaa (Finland). R and D Section

    1995-12-31

    Feeding of solid fuel into high pressure is an essential part of the pressurized power plant processes. A pilot scale fuel feeder meeting the requirements of these processes has been designed and built by Imatran Voima Oy (IVO). The fuel feeder is capable of feeding both relatively dry and wet solid material into high pressure. The object of this project was to develop the pilot scale fuel feeder to commercial level. The project was financed by IVO and Bioenergia -research programme. The project included testing of the previously built pilot-feeder at real operating conditions using peat and wood biomass as feedstocks. The testing consisted of short term and long term runs, which provided information about the operation and durability of the feeder with different materials. The tests were carried out partly in IVO`s laboratory, and partly in Jyvaeskylae at the pressurized steam drying pilot plant owned by IVO and VTT. The pilot-feeder operated well and reliably during the feeding tests. The feeder was dissembled and the parts were inspected between and after the test periods. No sign of excessive wear of the parts was noticed. Based on the good experiences from the pilot scale testing a commercial feeder with the capacity of 50 m{sup 3}/h was designed

  20. Spring ud i arbejdet med LGBT+ ligestilling

    DEFF Research Database (Denmark)

    Friis Christensen, Jannick; Voergård-Olesen, Rikke

    2017-01-01

    Det er i hele arbejdspladsens interesse, at medarbejderes trivsel sikres uanset deres kønsidentitet eller seksuelle orientering. Her er tre gode råd til, hvordan man kan skabe et mere rummeligt arbejdsmiljø....

  1. Mobilitet og fremkommelighed i hovedstaden

    DEFF Research Database (Denmark)

    Larsen, Leo; Friis-Mikkelsen, Christel; Jespersen, Per Homann

    Med Trængselskommissionens betænkning fremlægges en samlet strategi for modernisering af hovedstadsområdets transportsystem, der vil øge kapaciteten og styrke mobiliteten i hele hovedstadsområdet....

  2. Filmimehed ootavad menuromaani filmimisele ligi sadat läänlast / Andrus Karnau

    Index Scriptorium Estoniae

    Karnau, Andrus

    2002-01-01

    Albert Kivikase romaani "Nimed marmortahvlil" järgi tehtavat mängufilmi välisvõtted algavad Haapsalu raudteejaamas, kuhu oodatakse vabatahtlikke massistseenidesse. Peaosades esinevad Priit Võigemast ja Hele Kõre

  3. Maxima poekett mitmendat aastat järjest keeleinspektsiooni murelaps / Dannar Leitmaa

    Index Scriptorium Estoniae

    Leitmaa, Dannar, 1982-

    2008-01-01

    Kauplusekettidest on kõige rohkem saanud keeleinspektsioonilt ettekirjutusi Maxima. Inspektsiooni nõuniku Hele Pärna, Maxima pressiesindaja Erkki Erilaiu selgitusi. Lisa: Probleem haridussüsteemis?

  4. New Religions and Globalization

    DEFF Research Database (Denmark)

    Bogen er en antologi af bidrag fra en konference under Research Network on New Religions (RENNER). Med bidrag fra specialister i nye religioner og globalisering fra hele verden introduceres empiriske resultater samt teoretiske og metodiske reflektioner over emnet....

  5. Esilinastus väge täis "Mina olin siin" / Kutt Kommel

    Index Scriptorium Estoniae

    Kommel, Kutt

    2008-01-01

    Rene Vilbre noortefilm "Mina olin siin", mille aluseks on Sass Henno romaan "Mina olin siin. Esimene arest" : operaator Mait Mäekivi : osades Rasmus Kaljujärv, Hele Kõre jt : Amrion Productions - Helsinki-filmi OY 2008

  6. Millest unistad ja kelleks tahad saada, ilus poiss? / Kati Murutar

    Index Scriptorium Estoniae

    Murutar, Kati, 1967-

    2008-01-01

    Rene Vilbre noortefilm "Mina olin siin", mille aluseks on Sass Henno romaan "Mina olin siin. Esimene arest" : osades Rasmus Kaljujärv, Hele Kõre, Tambet Tuisk, Jaan Rekkor : Amrion Productions - Helsinki-filmi OY

  7. Terves kehas terve vaim / Ants Kalev

    Index Scriptorium Estoniae

    Kalev, Ants

    2003-01-01

    Politseinike sporditegevusest. Kommenteerivad: Andres Anvelt, Elina Rikken, Robert Antropov, Annika Tikk, Kalle Laanet, Priit Heinsoo, Elmar Nurmela, Urmas Treier, Ain Muru. Vt. lk. 23-25: Igaühele oma spordiala

  8. Üks võõramaine lind

    Index Scriptorium Estoniae

    1999-01-01

    lühirefereering Rootsi maastikuarhitektide ajakirja "Utblick/Landskap" 1998.a. erinumbris "Tre profiler" ilmunud Tove Jonstoj'i 8-leheküljelisest artiklist eesti päritolu aiaarhitektist Hele Lüüsist

  9. Wat er geworden is van de Amerikaanse droom: democratie in de Nieuwe Wereld na Bush [Review of: M. Keller America's three regimes: a new political history; P. Bobbitt Terror and consent: the wars for the twenty-first century; S.S. Wolin Democracy incorporated: managed democracy and the specter of inverted totalitarianism; S. Wilentz The age of Reagan: a history, 1974-2008

    NARCIS (Netherlands)

    de Beus, J.

    2009-01-01

    Over de hele wereld verwacht men dat de komst van Obama zal zorgen voor een ommekeer binnen de Amerikaanse politiek. Wat schrijven de deskundigen van eigen bodem over de toekomst van hun grillige democratie?

  10. V Germanii otkrõlsja otel dlja odnogo

    Index Scriptorium Estoniae

    2006-01-01

    Šveitsi kunstnike Sabina Langi ja Daniel Baumanni kunstiprojektist "Hotel Everland". See kujutab endast originaalset luksushotelli ühele inimesele. Rajatis asub Leipzigi kaasaegse kunsti galerii katusel. Kunstieksponaat rajati 2002. a. Swiss Expo jaoks

  11. Balanced Scorecard voor inkoop

    NARCIS (Netherlands)

    van der Honing, R.; Schotanus, Fredo

    2003-01-01

    Een Balanced Scorecard kan ontwikkeld worden voor de hele organisatie, maar ook voor onderdelen daarvan. In dit artikel wordt ingegaan op de ontwikkeling van een Balanced Scorecard voor de inkoopafdeling

  12. Reklaam kujundab inimeste elu / Anu Toots

    Index Scriptorium Estoniae

    Toots, Anu, 1959-

    2002-01-01

    Poliitilisest reklaamist Eestis teiste Euroopa riikide ja USA taustal. Poliitilise reklaami olemusest ja arengust Eestis. Diagrammid: parlamendivalimiste kampaaniakulutused SBR-s 1983-1997; Briti parlamendivalimiste kulude struktuur 1997; Eesti suuremate erakondade kogukulu ühele mandaadile Riigikogu valimistel 1999

  13. Hoofstuk 9 - Rasionalisasie en Optimalisering 1988–1997

    Directory of Open Access Journals (Sweden)

    J.P. Oberholzer

    2010-09-01

    Full Text Available Ontwikkelings op onderwysgebied en finansiële druk bring streng eise en lei tot ‘n intensiewe herstruktureing oor die hele spektrum. Personeelvermindering, hervorming van onderrigmetodes en die eis van uitnemendheid intensifiseer die akademiese bedryf.

  14. Vambola Hurt in memoriam / Hillar Tuiskvere ; foto: Leena Hurt

    Index Scriptorium Estoniae

    Tuiskvere, Hillar, 1930-2014

    2008-01-01

    järelehüüe eestlaste poolt rajatud ettevõtte AB Misomex kauaaegsele tegevdirektorile, Eesti Filateelia kataloogi ühele autorile, AS Linette'i nõukogu esimehele ja nõustajale, ainulaadse huumorimeelega Vambola Hurtile

  15. HDR ühest kaadrist? / Janno Loide

    Index Scriptorium Estoniae

    Loide, Janno

    2008-01-01

    HDR-töötluse (High dynamic range - pildi kõrge dünaamiline ulatus) ja toonide kohandamise (tone mapping) meetodite kasutamisest pildi digitaalsel salvestusel ning sobiva hele-tumeduse leidmisel loodusfotode parema kvaliteedi saamiseks

  16. Arvo Pärt Dorian Supini filmides / Merike Vaitmaa

    Index Scriptorium Estoniae

    Vaitmaa, Merike, 1939-

    2002-01-01

    Dorian Supini dokumentaalfilmid helilooja Arvo Pärdist ja tema muusikast "24 prelüüdi ühele fuugale", "Sinu nimi", "Cecilia", "Orient & Occident". Kõik valmisid stuudio F-Seitse teostuses aastail 2001-2002

  17. Plot 6

    DEFF Research Database (Denmark)

    Lund, Inger-Lise; Ferdinand, Trine; Abildgaard, Stina

    Elevbogen indeholder 6 kapitler. Kapitlernes indhold kommer rundt i hele danskfaget med forskellige vinkler, og elevernes læring udspringer af kompetenceområderne: læsning, fremstilling, fortolkning og kommunikation...

  18. Edgar Savisaar : Mina ei anna mitte mingit hinnangut / Edgar Savisaar ; interv. Dannar Leitmaa, Holger Roonemaa

    Index Scriptorium Estoniae

    Savisaar, Edgar, 1950-

    2008-01-01

    Tallinna linnapea vastused linnavalitsuse pressikonverentsil küsimustele, mis puudutasid Keskerakonna suurrahastaja Oliver Kruuda omavolilist ehitamist Nõmmel. Vt. samas: Holger Roonemaa. Inspektorid ei pannud Kruuda tegevust tähele

  19. Perancangan Sistem Surge Absorber Untuk Mencegah Terjadinya Waterhammer Pada Pipeline Sistem Pendistribusian Avtur Di DPPU Pertamina - Bandara Ngurah Rai

    Directory of Open Access Journals (Sweden)

    Agung Dwi Sulaksono

    2013-03-01

    Full Text Available Aliran fluida transient erat kaitannya dengan fenomena fluida yang dikenal dengan water hammer. Water hammer yang tidak terkendali dapat berakibat buruk pada instalasi sistem perpipaan. Untuk menghindari dampak buruk keberdaan water hammer dapat dilakukan dengan cara memasang komponen perpipaan, salah satunya adalah surge absorber. Sehubungan dengan rencana pengembangan jalur perpipaan serta penambahan kapasitas pompa DPPU Pertamina maka diperlukan kajian mengenai performansi surge absorber yang telah terpasang dan surge absorber yang dibutuhkan untuk mencegah water hammer pada header pit sistem perpipaan DPPU Pertamina yang baru. Kajian tersebut dilakukan dengan cara membuat simulasi yang menmggunakan Method Of Characteristic untuk menyelesaikan persamaan dasar water hammer. Dari hasil kajian yang telah dilakukan, diketahui bahwa delapan buah surge absorber yang terpasang pada sistem perpipaan DPPU Pertamina memiliki volume gas yang masih berada pada range kerjanya . Sedangkan untuk mengatasi water hammer pada jalur pipa tambahan, diperlukan penambahan 4 buah surge absorber yang diletakkan pada sistem perpipaan yang baru.

  20. Bubbling fluidized bed boiler for Vanaja power plant

    Energy Technology Data Exchange (ETDEWEB)

    Sormunen, R.; Haermae, P.; Vessonen, K.; Ketomaeki, A. [ed.

    1998-07-01

    At the Vanaja Power Plant, on the outskirts of Haemeenlinna, there have been changes which reflect the central goals in IVO`s product development work. At Vanaja, efficiency is combined with environmental friendliness. In the early 1980s, the plant was modernized to produce district heat in addition to electricity. At that time, along with the new gas turbine at the plant, the main fuel, coal, while remaining the fuel for the old boilers, was replaced by natural gas. This year a new type of bubbling fluidized bed boiler enabling continuous use of peat and trial use of biofuels along with coal was introduced at the plant. In addition to the Nordic countries, this kind of technology is required in central eastern Europe, where modernization of ageing power plants is being planned to achieve the best possible solutions in respect of production and the environment. IVO develops a new repair technique for underwater sites

  1. Suitability of Haestholmen Loviisa for final disposal of spent fuel. Preliminary study; Loviisan Haestholmenin soveltuvuus kaeytetyn polttoaineen loppusijoitukseen. Esiselvitys

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1996-12-01

    Based on the amendment of the Nuclear Energy Act the spent nuclear fuel of Imatran Voima Oy (IVO) will be disposed of in Finland instead of returning it to Russia. After Teollisuuden Voima Oy (TVO) and IVO had founded a joint company Posiva Oy the work IVO started in 1995 was brought together with the ongoing research programme for final disposal of spent fuel and extended to a feasibility study. The feasibility study was launched in the beginning of 1996. The geological evaluation was mainly based on the previous investigations at the island. For this study the complementary geological mapping has been carried out at the Haestholmen and on the surrounding area with a radius of 20 km. (49 refs.).

  2. Properties of Vanadium-Doped Indium Oxide Deposited at Room Temperature as Transparent Conductor for Inverted Polymer Solar Cells

    Science.gov (United States)

    Choi, Min-Jun; Lim, Keun Yong; Park, Hyun-Woo; Kim, Han-Ki; Hwang, Do Kyung; Lim, Sung-Jin; Shim, Jae Won; Chung, Kwun-Bum

    2017-10-01

    The properties of vanadium-doped indium oxide (IVO) deposited at room temperature as a transparent conductor for inverted polymer solar cells have been investigated as a function of the vanadium doping concentration. IVO film prepared with V doping concentration of 0.03% showed optimal properties for use as a transparent conductor with figure of merit of 4.35 × 10-3 Ohm-1, related to altered band alignment between the Fermi level and conduction-band minimum. In the optimal optoelectrical conditions for the IVO film, performance optimization of PTB7:PC70BM inverted polymer solar cells resulted in maximum power conversion efficiency of 4.7 ± 0.4% under simulated air mass 1.5 global illumination at 100 mW/cm2.

  3. Store drømme og stille desperation

    DEFF Research Database (Denmark)

    Gjerris, Mickey

    2016-01-01

    Etisk set er det værd at tænke over, at David Bowie satte det hele på spidsen. Viste os, at mediernes fiktion netop er en fiktion.......Etisk set er det værd at tænke over, at David Bowie satte det hele på spidsen. Viste os, at mediernes fiktion netop er en fiktion....

  4. Da flashmobs blev kommercielle

    DEFF Research Database (Denmark)

    Thomsen, Line Hassall

    2017-01-01

    Det ligner leg. Og så leger du selv med. Men i virkeligheden er du pludselig en del af en markedsføring med sløret afsender. Det hele tager kun et par minutter i virkeligheden, og det synes måske ikke af noget stort, men det efterlader et medieprodukt, der varer langt længere og deles til hele ve...

  5. Vestled - Hvide Sande

    DEFF Research Database (Denmark)

    Juel-Christiansen, Carsten; Hesselbjerg, Marianne; Schønherr, Torben

    2009-01-01

    Værket Vestled i Hvide Sande præsenteret i sammenhæng af 1000 nutidige landskabsarkitektoniske arbejder fra hele verden, hvor hvert værk vises på én side......Værket Vestled i Hvide Sande præsenteret i sammenhæng af 1000 nutidige landskabsarkitektoniske arbejder fra hele verden, hvor hvert værk vises på én side...

  6. Ukrudt - en del af helheden

    DEFF Research Database (Denmark)

    Rasmussen, Jesper

    2009-01-01

    ØKOBLOGGEN: Hvordan griber man ukrudt an i et økologisk landbrug? Og hvordan tænker man i det hele taget ukrudt ind i økologiens værdisæt? Udgivelsesdato: 4. september......ØKOBLOGGEN: Hvordan griber man ukrudt an i et økologisk landbrug? Og hvordan tænker man i det hele taget ukrudt ind i økologiens værdisæt? Udgivelsesdato: 4. september...

  7. Supervision og de tre k´er

    DEFF Research Database (Denmark)

    Schilling, Benedicte; Jacobsen, Claus Haugaard; Nielsen, Jan

    2010-01-01

    Kontrol, kontrakt og kontekst er supervisionens tre k'er. Men hvad er supervision i det hele taget for en størrelse, der spillerså central en rolle for den psykologfaglige profession?......Kontrol, kontrakt og kontekst er supervisionens tre k'er. Men hvad er supervision i det hele taget for en størrelse, der spillerså central en rolle for den psykologfaglige profession?...

  8. Anmeldelse af: Soldat og diplomat. Mine tre år i Afghanistan

    DEFF Research Database (Denmark)

    Vestenskov, David

    2014-01-01

    ”Et øjeblik stod tiden stille. Så eksploderede alt i skyderi. Hele vejen rundt blev luften fuld af kuglernes smæld. Taliban-krigerne var krøbet frem fra buske og grøfter for at åbne ild mod de små lerhytter, vi havde forskanset os i. Nu er det hele slut. Nu dør jeg. Nu dør jeg!” Marcus Knuth indl...

  9. The Determination of Sediment Polycyclic Aromatic Hydrocarbon (PAH) Bioavailability using Direct Pore Water Analysis by Solid-Phase Microextraction (SPME)

    Science.gov (United States)

    2010-08-01

    Using Semi- permeable Membrane Devices and Filter-feeding Clams; a 2001 report from the Academy of Natural Sciences entitled Sediment Transport...portion of a hammer to remove nails and not as 20 September 2007 a pick or awl. Have an unobstructed view and swing when using a hammer. Watch...for overhead interference on back and forward swing. Use a good grip and use something other then your hand to hold a nail when starting hammering

  10. Analisis Kinerja Pegawai Pada Sekretariat Komisi Pemilihan Umum (Kpu) Kota Palu

    OpenAIRE

    Syari, Ika Widya

    2013-01-01

    This research aim to analyse the Officer performance of at Secretariat of General Election Commission (KPU) of Hammer Town, and know the factors of supporter and resistor of Officer performance of Secretariat of General Election Commission ( KPU) of Hammer Town. Book Study in this research that is performance, conception the PNS, Officer Ability. Research Location in Office of Secretariat of KPU of Hammer Town. Informan Election use the Purposive Sampling. By specifying 7 people as Data infor...

  11. 75 FR 56061 - Notice of Petitions by Firms for Determination of Eligibility To Apply for Trade Adjustment...

    Science.gov (United States)

    2010-09-15

    ... 49203. oil and pneumatic presses, rotary index tables, pneumatic impact hammers, electric punches, and... board lettering. The firm also manufactures rulers, drafting supplies, plastic rulers and various...

  12. 29 CFR 1910.243 - Guarding of portable powered tools.

    Science.gov (United States)

    2010-07-01

    ... than 2 inches, electric, hydraulic or pneumatic chain saws, and percussion tools without positive..., powered tampers, jack hammers, rock drills, garden appliances, household and kitchen appliances, personal...

  13. 15 CFR 700.31 - Metalworking machines.

    Science.gov (United States)

    2010-01-01

    ... Drilling and tapping machines Electrical discharge, ultrasonic and chemical erosion machines Forging machinery and hammers Gear cutting and finishing machines Grinding machines Hydraulic and pneumatic presses...

  14. The Particle Distribution in Liquid Metal with Ceramic Particles Mould Filling Process

    Science.gov (United States)

    Dong, Qi; Xing, Shu-ming

    2017-09-01

    Adding ceramic particles in the plate hammer is an effective method to increase the wear resistance of the hammer. The liquid phase method is based on the “with the flow of mixed liquid forging composite preparation of ZTA ceramic particle reinforced high chromium cast iron hammer. Preparation method for this system is using CFD simulation analysis the particles distribution of flow mixing and filling process. Taking the 30% volume fraction of ZTA ceramic composite of high chromium cast iron hammer as example, by changing the speed of liquid metal viscosity to control and make reasonable predictions of particles distribution before solidification.

  15. New concept for condition management of plants as a result of the KUNTO project. New operations approach reduces costs

    Energy Technology Data Exchange (ETDEWEB)

    McNiven, U.; Tamminen, L.

    1998-07-01

    IVO Generation Services Ltd. has carried out a project at the IVO Naantali power plant to develop the plants condition management. The project defines critical and monitored components for each system. In addition, recommendations for further action, investment proposals and suggestions for changes in maintenance and operations practices were supplied for the various systems in the plant. The systematic approach which was the result of the projects integrated into maintenance and operations practices where data collection and analysis is part of the routine. Up-to-date data is utilized in focusing maintenance and investments, in planning and reporting functions

  16. Selion offers a unique system for treating liquid nuclear waste

    Energy Technology Data Exchange (ETDEWEB)

    Tusa, E.; Kurki, H. [ed.

    1998-07-01

    Studies on the treatment of liquid nuclear waste have been conducted actively in the IVO Group since the early 1980s. And the work has borne fruit: the CsTreat and SrTreat ion exchange products, developed by the IVO Group, were launched three years ago. The ion exchangers have already been in full use at a number of sites throughout the world. In addition, they are currently being tested at many nuclear research institutes and power plants in the USA, Japan and Europe

  17. Nuclear waste management programme 1999 for the Loviisa and Olkiluoto nuclear power plants; Olkiluodon ja Loviisan voimalaitosten ydinjaetehuollon ohjelma 1999

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1998-09-01

    A joint company Posiva Oy founded by nuclear energy producing Teollisuuden Voima Oy (TVO) and Imatran Voima Oy (IVO) coordinates the research work of the companies on nuclear waste management in Finland. in Posiva`s Nuclear Waste Management Programme 1999, an account of the nuclear waste management measures of TVO and IVO is given as required by the sections 74 and 75 of the Finnish Nuclear Energy Degree. At first, nuclear waste management situation and the programme of activities are reported. The nuclear waste management research for the year 1999 and more generally for the years 1999-2003 is presented 3 refs.

  18. Outer retina reflectivity changes on sd-oct after intravitreal ocriplasmin for vitreomacular traction and macular hole.

    Science.gov (United States)

    Quezada-Ruiz, Carlos; Pieramici, Dante J; Nasir, Maʼan; Rabena, Melvin; Steinle, Nathan; Castellarin, Alessandro A; Dhoot, Dilsher; Couvillion, Stephen; See, Robert F; Avery, Robert L

    2015-06-01

    To report initial experience with intravitreal ocriplasmin (IVO) and to describe outer retina reflectivity changes observed on spectral domain optical coherence tomography (SD-OCT) after IVO injection in patients with vitreomacular traction (VMT) with or without macular holes (MHs). A consecutive retrospective review of patients with VMT and MH who were treated with IVO was performed. Patients underwent complete ophthalmic evaluation, including nonstandardized Snellen visual acuity testing, and SD-OCT at baseline and follow-up visits. A total of 23 patients who received IVO for VMT and/or MH were included for analysis. Patient age ranged from 53 years to 93 years with a mean of 74 years. The mean follow-up was 174 days (range: 20-291 days). Vitreomacular traction release at Day 30 after IVO was achieved in 11 of 23 patients (47.82%), at an average of 14.54 days (range: 1-30 days) after treatment. The mean visual acuity improved from 0.50 to 0.38. At presentation, eight patients had MH associated with VMT. Closure of the MH with ocriplasmin was achieved in two patients, and six patients underwent pars plana vitrectomy for MH repair. Ten of 23 patients (43.47%) presented with changes in the outer retina reflectivity on SD-OCT after IVO, 4 patients of this group experienced a decrease in visual acuity. In 7 of these 10 patients (70%), VMT release was documented on OCT by Day 30 postinjection compared with 4 of 13 patients (30.76%) without outer retina changes post-IVO. Normalization of the outer retina reflectivity was achieved in all cases. In this case series of VMT/MH patients treated with ocriplasmin, changes in the SD-OCT outer retina reflectivity were relatively common. Within weeks, the outer retinal reflectivity on SD-OCT improved, as did the visual acuity. Further studies to investigate the association between outer retina reflectivity changes with the use of IVO and long-term visual acuity outcomes are warranted.

  19. Karen Blixen i øst og vest

    DEFF Research Database (Denmark)

    Heede, Dag

    2014-01-01

    Anmeldelser af Ivo Holmqvist (red.): Den främmande förförerskan. Svenska synpunkter på Karen Blixen og Marianne T. Stecher: The Creative Dialectic in Karen Blixen’s Essays. On Gender, Nazi Germany, and Colonial Desire......Anmeldelser af Ivo Holmqvist (red.): Den främmande förförerskan. Svenska synpunkter på Karen Blixen og Marianne T. Stecher: The Creative Dialectic in Karen Blixen’s Essays. On Gender, Nazi Germany, and Colonial Desire...

  20. Applied modal analysis of wind turbine blades

    DEFF Research Database (Denmark)

    Pedersen, H.B.; Kristensen, O.J.D.

    2003-01-01

    are investigated and the most suitable are chosen. Different excitation techniques are tried during experimental campaigns. After a discussion the pendulum hammer were chosen, and a new improved hammer wasmanufactured. Some measurement errors are investigated. The ability to repeat the measured results...

  1. The Silence of Michelangelo

    DEFF Research Database (Denmark)

    Foote, Jonathan

    2016-01-01

    , and undifferentiated sounds. From Hephaestus' beating mallet to Pythagoras' discovery of aural proportions upon passing a blacksmith shop, the hammer has played a key role in releasing the latencies of thought. Building on this notion, Marsilio Ficino wrote that the harmonious beating of the hammer, reenacting...

  2. 36 CFR 223.186 - Definitions.

    Science.gov (United States)

    2010-07-01

    ... are removed. Hammer brand refers to an identifying mark or brand composed of numbers, letters... similar striking tool. The hammer brand must make a legible imprint of the brand in the end of a log when... factors, including but not limited to common ownership, common management, common facilities, and...

  3. Moving images, editoned artworks and authenticity

    NARCIS (Netherlands)

    Noël de Tilly, A.; Hermens, E.; Fiske, T.

    2009-01-01

    This study delves into the history of the presentations and transformations of John Massey’s As the Hammer Strikes (A Partial Illustration) (1982) and Douglas Gordon’s Play Dead; Real Time (2003). John Massey’s As the Hammer Strikes (A Partial Illustration) was initially presented as three

  4. Selected properties of particleboard panels manufactured from rice straws of different geometries

    Science.gov (United States)

    Xianjun Li; Zhiyong Cai; Jerrold E. Winandy; Altaf H. Basta

    2010-01-01

    The objective is to evaluate the primary mechanical and physical properties of particleboard made from hammer-milled rice straw particles of six different categories and two types of resins. The results show the performance of straw particleboards is highly dependent upon the straw particle size controlled by the opening size of the perforated plate inside the hammer-...

  5. 76 FR 67419 - Takes of Marine Mammals Incidental to Specified Activities; Piling and Structure Removal in...

    Science.gov (United States)

    2011-11-01

    ... minutes of hammer vibration over an 8-hour period. After vibration, a choker is used to lift the pile out... minimize the risk of direct injury from the equipment or from a piling or structure breaking free; The DNR... a maximum of 80 dB. The soft start method involves a reduced energy vibration from the hammer for...

  6. An automated data collection system for a Charpy impact tester

    Science.gov (United States)

    Weigman, Bernard J.; Spiegel, F. Xavier

    1993-01-01

    A method for automated data collection has been developed for a Charpy impact tester. A potentiometer is connected to the pivot point of the hammer and measures the angular displacement of the hammer. This data is collected with a computer and, through appropriate software, accurately records the energy absorbed by the specimen. The device can be easily calibrated with minimal effort.

  7. Bulletin January 2007

    African Journals Online (AJOL)

    University of Agriculture in Morogoro and Coca-Cola. Kwanza Ltd. laboratory, Dar es Salaam, Tanzania in order to authenticate the results. Determination of biochemical oxygen demand. The water biochemical oxygen demand (BOD) was determined using the technique described by Hammer. & Hammer (2003).

  8. Hus og sted

    DEFF Research Database (Denmark)

    Kristensen, Peter Thule

    2003-01-01

    Analyse af enfamiliehusbyggeri i Danmark af bl.a. arkitekterne Schmidt Hammer og Lassen, Cebra og Søren Robert Lund......Analyse af enfamiliehusbyggeri i Danmark af bl.a. arkitekterne Schmidt Hammer og Lassen, Cebra og Søren Robert Lund...

  9. SO Agha * AE Akpan,+** and EE Okwueze +

    African Journals Online (AJOL)

    2005-08-02

    Aug 2, 2005 ... the 10 sites investigated show that seismic waves from the hammer source penetrated only the .... establishing stations in each of the five major ... The s waves were generated by hitting the same sledge-hammer horizontally on the same steel plate equally coupled firmly to the ground. Nigerian Journal of ...

  10. Use of pile driving analysis for assessment of axial load capacity of piles : [technical summary].

    Science.gov (United States)

    2012-01-01

    The dynamic response of a pile during driving is very : complex, involving the interactions of the hammer, cushion, : pile and soil during application of an impact load. : The first analysis aimed at simulating a hammer blow on : a pile was published...

  11. 20 aastat antiikaega / Neeme Näripä

    Index Scriptorium Estoniae

    Näripä, Neeme

    2012-01-01

    Arvustus: Quattuor Lustra : papers celebrating the 20th anniversary of the re-establishment of classical studies at the University of Tartu / edited by Ivo Volt, Janika Päll. Tartu : Tartu University Press, 2012. (Morgensterni Seltsi toimetised ; 4-5)

  12. Evelin Ilves saab sama nimega firmalt tasuta uisutrikoosid / Kadri Jakobson

    Index Scriptorium Estoniae

    Jakobson, Kadri, 1970-

    2008-01-01

    Proua Evelin Ilves saab rulluisutrikood tootjafirmalt Ilves-Extra tasuta. Presidendi kantselei sõnul testib Rulluisuliidu president E. Ilves uisutrikood, mida Ilves-Extra alles kavatseb tootmisse võtta. Arvamust avaldavad Ilves-Extra juht Arvo Kivikas ja suhtekorraldusekspert Ivo Rull

  13. Marko ja Maarja helistavad muusikat / Stella K. Wadowsky

    Index Scriptorium Estoniae

    Wadowsky, Stella K.

    2002-01-01

    2003.a. kevadel esietenduva R. Rodgersi muusikali "Helisev muusika" reklaamiva videoklipi filmimiseks sõitis eesti võttetrupp Austriasse, kaasas lavastaja Ivo Eensalu, režissöör Arko Okk ja peaosatäitjad Marko Matvere ja Maarja-Liis Ilus

  14. Õpetaja, kus asub Kennedy neem? / Marii Karell

    Index Scriptorium Estoniae

    Karell, Marii, 1980-

    2003-01-01

    Kanal 2s algab uus kodumaine komöödiaseriaal "Õpetajate tuba", mille käsikiri on Peep Pedmansonilt, lavastaja Ivo Eensalu, kes artiklis meenutab oma kooliaegu. Lisaks sõnumid "Eino Baskin sokutas õpetaja istumise alla siili" ja "Madis Milling - rohkem kõnemees kui tangensite tagaajaja"

  15. Hematology - Open TG-GATEs | LSDB Archive [Life Science Database Archive metadata

    Lifescience Database Archive (English)

    Full Text Available switchLanguage; BLAST Search Image Search Home About Archive Update History Data ...ivo tests. Data file File name: open_tggates_hematology.zip File URL: ftp://ftp.biosciencedbc.jp/archive/ope...en About This Database Database Description Download License Update History of This Database Site Policy | Contact Us Hematology - Open TG-GATEs | LSDB Archive ...

  16. Klaas ja mõis / Maie-Ann Raun

    Index Scriptorium Estoniae

    Raun, Maie-Ann, 1938-

    2007-01-01

    Klaasikunstinäitus "Ringkäik" Albu mõisas, kuraatorid Virve Kiil, Kati Kerstna, Kairi Orgusaar. Eksponeeritakse Tiina Sarapu, Mare Saare, Eeva Käsperi, Kai Kiudsoo-Värvi, Pilvi Ojamaa, Merle Bukoveci, Kalli Seina, Viivi-Ann Keerdo, Liisi Junolaineni, Kristiina Uslari, Ivo Lille töid

  17. Floor heating maximizes residents` comfort

    Energy Technology Data Exchange (ETDEWEB)

    Tirkkanen, P.; Wikstroem, T.

    1996-11-01

    Storing heat in floors by using economical night-time electricity does not increase the specific consumption of heating. According to studies done by IVO, the optimum housing comfort is achieved if the room is heated mainly by means of floor heating that is evened out by window or ceiling heating, or by a combination of all three forms of heating. (orig.)

  18. Jälle need Milling ja Normann / Ilona Martson

    Index Scriptorium Estoniae

    Martson, Ilona, 1970-

    2003-01-01

    Kanal 2 uus kodumaine komöödiaseriaal "Õpetajate tuba" : käsikiri Peep Pedmanson : lavastus Ivo Eensalu : näitlejad Ita Ever, Eino Baskin, Madis Milling, Henrik Normann, Maria Klenskaja, Margus Tabor jt. : tootjafirma "Ruut"

  19. "Rat Kingi" arvutimaailma kangelased jäädvustati filmilindile / Andres Laasik

    Index Scriptorium Estoniae

    Laasik, Andres, 1960-2016

    2011-01-01

    Arvutisõltlaste elust rääkiva Soome-Eesti põnevusfilmi "Rat King" (MakingMovies, Allfilm) filmivõtetest Eesti Televisiooni stuudios ja mujal Eestis. Režissöör Petri Kotwica, Eesti-poolne produtsent Ivo Felt, kunstnik Jaagup Roomet, kostüümikunstnik Anu Lensment

  20. Author Details

    African Journals Online (AJOL)

    Trogrlić, Ivo. Vol 13, No 6 (2016) - Articles Treatment of progression of diffuse astrocytoma by herbal medicine: case report. Abstract PDF. ISSN: 0189-6016. AJOL African Journals Online. HOW TO USE AJOL... for Researchers · for Librarians · for Authors · FAQ's · More about AJOL · AJOL's Partners · Terms and Conditions of ...