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Sample records for gerda paulsen hanna

  1. Gerda Murre / Lidia Sooster

    Index Scriptorium Estoniae

    Sooster, Lidia, 1926-1999

    2000-01-01

    Estonia teatri laulja Gerda Murre elust Karaganda oblastis Kiilasmäe erilaagris, kus ta oli Kiilasmäe naisteteatri kunstiline juht. (1940/41 aastavahetusel arreteeriti ebaseaduslikult ja saadeti 1941 asumisele Siberisse). Ka hilisematest kokkupuudetest Eestis

  2. The GERDA calibration system

    Energy Technology Data Exchange (ETDEWEB)

    Baudis, Laura; Froborg, Francis; Tarka, Michael; Bruch, Tobias; Ferella, Alfredo [Physik-Institut, Universitaet Zuerich (Switzerland); Collaboration: GERDA-Collaboration

    2012-07-01

    A system with three identical custom made units is used for the energy calibration of the GERDA Ge diodes. To perform a calibration the {sup 228}Th sources are lowered from the parking positions at the top of the cryostat. Their positions are measured by two independent modules. One, the incremental encoder, counts the holes in the perforated steel band holding the sources, the other measures the drive shaft's angular position even if not powered. The system can be controlled remotely by a Labview program. The calibration data is analyzed by an iterative calibration algorithm determining the calibration functions for different energy reconstruction algorithms and the resolution of several peaks in the {sup 228}Th spectrum is determined. A Monte Carlo simulation using the GERDA simulation software MAGE has been performed to determine the background induced by the sources in the parking positions.

  3. GERDA: Results and perspectives

    Science.gov (United States)

    Cattadori, Carla Maria; GERDA Collaboration

    2015-08-01

    From November 2011 to May 2013, GERDA searched for 0 νββ and 2 νββ of 76Ge, operating bare in a liquid argon bath Ge detectors enriched up to ˜ 87% in 76Ge (enrGe), for a total mass of ˜ 18 kg of enrGe. A total exposure of 21.6 kgṡy, of enrGe was collected, and the existing claim [H. V. Klapdor-Kleingrothaus et al., Phys. Lett. B 586 (2004) 198] of 0 νββ evidence was scrutinized. GERDA didn't observe any peak at Qββ or in its immediate surroundings; the limit of T1/20ν > 2.1 ṡ1025 yr (90 % C.L.) is derived [GERDA collaboration: M. Agostini et al., Phys. Rev. Lett. 111, (2013) 122503]. When combining the GERDA limit with those of past HdM [HdM collaboration: H. V. Klapdor-Kleingrothaus et al., Eur. Phys. J. A12 (2001) 147] and Igex [Igex Collaboration: C. E. Aalseth et al., Phys. Rev. D 65 (2002) 092007] experiments, the lower limit of 3.0 ṡ1025 yr (90 % C.L.) on T1/20ν is achieved. The background index (BI) at Qββ (˜ 2039 keV) is ˜ 2.0 ṡ10-2 cts / (keV ṡkg ṡyr) and ˜ 1.0 ṡ10-2 cts / (keV ṡkg ṡyr), prior and after the pulse shape cuts respectively. Thanks to the low background the 2 νββ dominates the energy spectrum below 1800 keV: the Tν1/2 2 = (1.84-0.10+0.14) ṡ1021y was derived on a first data set corresponding to 5.1 kgṡyr exposure [GERDA collaboration: M. Agostini et al., J. Phys. G 40 (2013), 035110]. The ongoing experimental program, to double the exposed mass by adding new enrGe detectors with improved pulse shape discrimination features, and to implement the liquid argon scintillation light readout is outlined.

  4. Status of the GERDA experiment

    International Nuclear Information System (INIS)

    Medinaceli, E.

    2016-01-01

    The GERDA experiment is designed to search for neutrinoless double beta decay (0νββ) using "7"6Ge, therefore asses the nature of neutrinos (Dirac or Majorana). In the so-called Phase I, with an exposure of 21.6 kr yr, GERDA reached a background index (BI) of 10"−"2 cts/(keV kg yr) at 90% CL No signal was found during this phase and a lower limit on the process half-life of 2.1 × 10"2"5 yr was derived (90% CL). GERDA is currently being upgraded to its Phase II, where the "7"6Ge mass will be double, and it is expected to reduce by an order of magnitude the BI. For 0νββ half-lives at the order of 10"2"6 yr will be derived in the absence of signal. The experimental techniques used by GERDA will be depicted and the most relevant results from Phase I will be shown; as well as details on the upgrades of Phase II, including the status of the additional detectors deployed recently, and the new background reduction techniques using the active liquid Argon veto.

  5. Status of the GERDA experiment

    Science.gov (United States)

    Medinaceli, E.; Gerda Collaboration

    2017-07-01

    The GERDA experiment is designed to search for neutrinoless double beta decay (0νββ) using ^{76} Ge, therefore asses the nature of neutrinos (Dirac or Majorana). In the so-called Phase I, with an exposure of 21.6kr yr, GERDA reached a background index (BI) of 10^{-2}{ cts/(keV kg yr)} at 90% CL No signal was found during this phase and a lower limit on the process half-life of 2.1×10^{25}{ yr} was derived (90% CL). GERDA is currently being upgraded to its Phase II, where the ^{76} Ge mass will be double, and it is expected to reduce by an order of magnitude the BI. For 0νββ half-lives at the order of 10^{26}{ yr} will be derived in the absence of signal. The experimental techniques used by GERDA will be depicted and the most relevant results from Phase I will be shown; as well as details on the upgrades of Phase II, including the status of the additional detectors deployed recently, and the new background reduction techniques using the active liquid Argon veto.

  6. Upgrades for GERDA Phase II

    Science.gov (United States)

    Heisel, Mark

    2014-09-01

    The Germanium Detector Array (GERDA) experiment is searching for the neutrinoless double beta decay (0 νββ) of 76Ge. It is a process that violates lepton number conservation and is predicted to occur in extensions of the standard model of particle physics. GERDA is located underground in the Gran Sasso National Laboratory (LNGS), Italy. An array of bare high-purity germanium detectors enriched in 76Ge is operated in a cryostat with 64 m3 of liquid argon supplemented by a 3 m thick shield of water. The experiment aims at exploring the 0 νββ decay up to a half life of 2 .1026 yr in two phases: Phase I of the experiment has been concluded last year. No signal is observed and the so far best limit is derived for the half life of the 0 νββ decay of 76Ge, T1/20ν GERDA) experiment is searching for the neutrinoless double beta decay (0 νββ) of 76Ge. It is a process that violates lepton number conservation and is predicted to occur in extensions of the standard model of particle physics. GERDA is located underground in the Gran Sasso National Laboratory (LNGS), Italy. An array of bare high-purity germanium detectors enriched in 76Ge is operated in a cryostat with 64 m3 of liquid argon supplemented by a 3 m thick shield of water. The experiment aims at exploring the 0 νββ decay up to a half life of 2 .1026 yr in two phases: Phase I of the experiment has been concluded last year. No signal is observed and the so far best limit is derived for the half life of the 0 νββ decay of 76Ge, T1/20 ν GERDA Collaboration.

  7. Low background aspects of GERDA

    International Nuclear Information System (INIS)

    Simgen, Hardy

    2011-01-01

    The GERDA experiment operates bare Germanium diodes enriched in 76 Ge in an environment of pure liquid argon to search for neutrinoless double beta decay. A very low radioactive background is essential for the success of the experiment. We present here the research done in order to remove radio-impurities coming from the liquid argon, the stainless steel cryostat and the front-end electronics. We found that liquid argon can be purified efficiently from 222 Rn. The main source of 222 Rn in GERDA is the cryostat which emanates about 55 mBq. A thin copper shroud in the center of the cryostat was implemented to prevent radon from approaching the diodes. Gamma ray screening of radio-pure components for front-end electronics resulted in the development of a pre-amplifier with a total activity of less than 1 mBq 228 Th.

  8. Gerdas råd

    DEFF Research Database (Denmark)

    Evron, Lotte Orr

    2017-01-01

    I den her blogpost vil jeg præsentere det, som Gerda kalder et eksemplarisk fald og fortælle om, hvordan hun lever med fald. Posten er udarbejdet ud fra en løbende samtale jeg havde sammen med ti mennesker, der var faldet. Samtalerne var slået op som et tilbud om en individuel samtale om fald, men...... medarbejderne, andre var mødt op på eget initiativ. Workshoppen foregik i august 2014. Seks af deltagerne var til stede hele seancen, fire gik til og fra undervejs. Gerda var en af dem, som valgte at blive under hele seancen. Et par af deltagerne ønskede ikke at samtalerne blev optaget, derfor blev der taget...... noter undervejs og efter workshoppen. Alle gav mundtlig tilladelse til, at jeg måtte bruge mine noter i min forskning og faldforebyggelsesarbejde. Gerda er 82 år og bor alene med sin hund i et stort hus. Ud over lidt hjælp til rengøring hver 14. dag klarer hun selv alt andet i sin dagligdag. Ca. tre...

  9. Development and installation of the GERDA experiment

    International Nuclear Information System (INIS)

    Smolnikov, A

    2010-01-01

    The progress in the development of the GERDA (GErmanium Detector Array) experiment is presented. The goal of the experiment is the search for neutrinoless double beta decay of 76 Ge with considerable reduction of background in comparison with predecessor experiments. GERDA will operate bare germanium semiconductor detectors (enriched in 76 Ge) submerged in high purity liquid argon supplemented by a water shield. The experimental set up is currently under construction in the underground facility of LNGS, Italy. The results of various R and D efforts and the main steps of the GERDA set up design and installation are given as well as several novel methods for background reduction are described.

  10. Hanna Geara pastellid Sambas / Kreg¡A-Kristring

    Index Scriptorium Estoniae

    Kreg A-Kristring, pseud., 1962-

    2000-01-01

    Maaliharidusega liibanoni noormehe Hanna Geara, kes õpib Roomas multimeediat, pastellinäitus "Puud sünnivad öösel" galeriis "Sammas". H. Geara piltide võrdlus Edward Hopperi ja Jukka Mäkela maalidega.

  11. Status of Gerda Phase II

    Energy Technology Data Exchange (ETDEWEB)

    Wagner, Victoria [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2016-07-01

    The GERDA experiment is designed to search for neutrinoless double beta (0νββ) decay of {sup 76}Ge. In Phase I of the experiment a background index (BI) of 10{sup -2} cts/(keV.kg.yr) was reached. No signal has been found and a lower limit on the half-life of 2.1.10{sup 25} yr (at 90% C.L.) is extracted. The aim of Phase II is to double the Ge mass and further reduce the BI by an order of magnitude to explore half-lives of about 10{sup 26} yr. Thirty new Broad Energy Germanium (BEGe) detectors have been produced. These detectors are distinct for their improved energy resolution and enhanced pulse shape discrimination of signal from background events. Further background reduction will be reached by an active veto to read out argon scintillation light. The Phase II commissioning showed that two of the major background components, external γ-rays from {sup 214}Bi and {sup 208}Tl decays, can be suppressed up to two orders of magnitude. This talk presents the current status of the GERDA Phase II upgrade.

  12. Test of GERDA Phase II detector assembly

    Energy Technology Data Exchange (ETDEWEB)

    Bode, Tobias; Gusev, Konstantin [Technische Universitaet Muenchen (Germany); Schwingenheuer, Bernhard; Wagner, Victoria [Max-Planck Institut fuer Kernphysik, Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2014-07-01

    The GERDA experiment searches for the lepton number violating neutrinoless double beta decay (0νββ) of {sup 76}Ge. The experiment uses HPGe detectors enriched in {sup 76}Ge as source and detection material. In GERDA Phase I five BEGe detectors were operated successfully. These detectors are distinguished for improved energy resolution and enhanced pulse shape discrimination (PSD) against background events. In Phase II additional 25 BEGe detectors will be installed. New electronics and radio-pure low-mass holders were specially designed for Phase II. Prior to the installation in GERDA all BEGe detectors are tested in their final assembly in the LNGS underground laboratory. This talk presents the mechanics and performance of the GERDA Phase II detector assembly.

  13. Hanna-Liina Võsa ja Ivo Linna laulavad armastatud filmilaule / Romi Erlach

    Index Scriptorium Estoniae

    Erlach, Romi, 1977-

    2000-01-01

    Ilmus eesti filmimuusika plaat "Siin me oleme", millel laulavad Ivo Linna ja Hanna-Liina Võsa Politseiorkestri ja Kuningliku kvinteti saatel. Vestlevad Hanna-Liina Võsa, Ivo Linna ja koostaja Tõnis Kõrvits

  14. LAr instrumentation for Gerda phase II

    Energy Technology Data Exchange (ETDEWEB)

    Wegmann, Anne [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    Gerda is an experiment to search for the neutrinoless double beta decay of {sup 76}Ge. Results of Phase I have been published in summer 2013. Currently the commissioning of Gerda Phase II is ongoing. To reach the aspired background index of ≤10{sup -3} cts/(keV.kg.yr) active background-suppression techniques will be applied, including an active liquid argon veto (LAr veto). It has been demonstrated by the LArGe test facility that the detection of argon scintillation light can be used to effectively suppress background events in the germanium, which simultaneously deposit energy in LAr. The light instrumentation consisting of photomultiplier tubes (PMT) and wavelength-shifting fibers connected to silicon multipliers (SiPM) has been installed in Gerda. In this talk the low background design of the LAr veto and its performance during the commissioning runs are reported.

  15. Experience from operating germanium detectors in GERDA

    Science.gov (United States)

    Palioselitis, Dimitrios; GERDA Collaboration

    2015-05-01

    Phase I of the Germanium Detector Array (GERDA) experiment, searching for the neutrinoless double beta (0νββ) decay of 76Ge, was completed in September 2013. The most competitive half-life lower limit for the 0νββ decay of 76Ge was set (T-0ν1/2 > 2.1 · 1025 yr at 90% C.L.). GERDA operates bare Ge diodes immersed in liquid argon. During Phase I, mainly refurbished semi-coaxial high purity Ge detectors from previous experiments were used. The experience gained with handling and operating bare Ge diodes in liquid argon, as well as the stability and performance of the detectors during GERDA Phase I are presented. Thirty additional new enriched BEGe-type detectors were produced and will be used in Phase II. A subgroup of these detectors has already been used successfully in GERDA Phase I. The present paper gives an overview of the production chain of the new germanium detectors, the steps taken to minimise the exposure to cosmic radiation during manufacturing, and the first results of characterisation measurements in vacuum cryostats.

  16. Experience from operating germanium detectors in GERDA

    International Nuclear Information System (INIS)

    Palioselitis, Dimitrios

    2015-01-01

    Phase I of the Germanium Detector Array (GERDA) experiment, searching for the neutrinoless double beta (0νββ) decay of 76 Ge, was completed in September 2013. The most competitive half-life lower limit for the 0νββ decay of 76 Ge was set (T- 0ν 1/2 > 2.1 · 10 25 yr at 90% C.L.). GERDA operates bare Ge diodes immersed in liquid argon. During Phase I, mainly refurbished semi-coaxial high purity Ge detectors from previous experiments were used. The experience gained with handling and operating bare Ge diodes in liquid argon, as well as the stability and performance of the detectors during GERDA Phase I are presented. Thirty additional new enriched BEGe-type detectors were produced and will be used in Phase II. A subgroup of these detectors has already been used successfully in GERDA Phase I. The present paper gives an overview of the production chain of the new germanium detectors, the steps taken to minimise the exposure to cosmic radiation during manufacturing, and the first results of characterisation measurements in vacuum cryostats. (paper)

  17. The GERDA experiment: results and perspectives

    Science.gov (United States)

    Macolino, Carla; Gerda Collaboration

    2014-11-01

    The Germanium Detector Array, GERDA, at Laboratori Nazionali del Gran Sasso (Italy), is designed to search for Majorana neutrinos via neutrinoless double beta (0νββ) decay of 76Ge. GERDA completed the Phase I in 2013, after an exposure of 21.6 kg·yr and with a background of about 0.01 cts/(keVkgyr): no signal was found and a limit on the half-life of T0ν1/2 > 2.1 · 1025 yr (90% C.L.) was established. The previous claim of 0νββ observation for 76Ge is strongly disfavoured in a model independent way. The commission for GERDA Phase II is currently ongoing and about 20 kg of additional enriched Ge diodes will be deployed. Pulse- shape analysis, together with the liquid argon instrumentation will allow to reach a background level one order of magnitude lower than in Phase I. In this paper the measurement of the half-life of 0νββ decay from GERDA Phase I and the expected sensitivity for Phase II are discussed.

  18. Status report of the GERDA experiment phase I

    International Nuclear Information System (INIS)

    Riboldi, Stefano

    2013-01-01

    Phase I of GERDA, aimed at investigating neutrino-less double beta decay of 76 Ge is in the active phase since November 2011 at the Gran Sasso National Laboratory of INFN—Italy. GERDA Ge detectors are non-encapsulated and operate immersed in liquid argon, equipped with a front-end readout electronics consisting of cryogenic charge sensitive preamplifiers designed and manufactured to cope with the characteristics of the GERDA experiment (radio-purity, long and resistive cables, etc.). The presentation will report on the current status of the GERDA experiment phase I, focusing on Ge detectors performance in terms of energy resolution, stability over time, counting rate and related issues

  19. Status report of the GERDA experiment phase I

    Science.gov (United States)

    Riboldi, Stefano; Gerda Collaboration

    2013-08-01

    Phase I of GERDA, aimed at investigating neutrino-less double beta decay of 76Ge is in the active phase since November 2011 at the Gran Sasso National Laboratory of INFN-Italy. GERDA Ge detectors are non-encapsulated and operate immersed in liquid argon, equipped with a front-end readout electronics consisting of cryogenic charge sensitive preamplifiers designed and manufactured to cope with the characteristics of the GERDA experiment (radio-purity, long and resistive cables, etc.). The presentation will report on the current status of the GERDA experiment phase I, focusing on Ge detectors performance in terms of energy resolution, stability over time, counting rate and related issues.

  20. Background characterization for the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Becerici-Schmidt, Neslihan [Max-Planck-Institut fuer Physik, Muenchen (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    The GERmanium Detector Array (Gerda) experiment at the LNGS laboratory of INFN searches for the neutrinoless double beta (0νββ) decay of {sup 76}Ge. A discovery of this decay can greatly advance our knowledge on the nature and properties of neutrinos. The current best limit on the half-life of {sup 76}Ge 0νββ decay is 1.9 . 10{sup 25} years (90% C.L.). In order to increase the sensitivity on the half-life with respect to past experiments, the background rate in the energy region of interest (ROI) around Q{sub ββ} = 2039 keV has been reduced by a factor 10. Gerda started data-taking with the full set of Phase I detectors in November 2011. Identification of the background in the first phase of the experiment is of major importance to further mitigate the background for Gerda Phase II. An analysis of the Phase I data resulted in a good understanding of the individual components in the Gerda background spectrum. The background components in the ROI have been identified to be mainly due to β- and γ-induced events originating from {sup 214}Bi ({sup 238}U-series), {sup 208}Tl ({sup 232}Th-series), {sup 42}K (progeny of {sup 42}Ar) and α-induced events coming from isotopes in the {sup 226}Ra decay chain. A background decomposition in the ROI will be presented, with a special emphasis on the contribution from α-induced events.

  1. Status of the GERDA Phase II upgrade

    Energy Technology Data Exchange (ETDEWEB)

    Wagner, Victoria [Max-Planck-Insitut für Kernphysik, Heidelberg (Germany)

    2016-06-21

    The GERDA experiment is designed to search for neutrinoless double beta (0νββ) decay of {sup 76}Ge. In Phase I of the experiment a background index of 10{sup −2} cts/(keV·kg·yr) was reached. A lower limit on the half-life of the 0νββ decay of {sup 76}Ge was set to 2.1·10{sup 25} yr (at 90% C.L.). The aim of Phase II is to reach a sensitivity of the half-life of about 10{sup 26} yr. To increase the exposure thirty new Broad Energy Germanium (BEGe) detectors have been produced. These detectors are distinct for their improved energy resolution and enhanced pulse shape discrimination of signal from background events. Further background reduction will be reached by a light instrumentation to read out argon scintillation light. In April 2015 the light instrumentation together with eight BEGe detectors has been successfully deployed in the GERDA cryostat. In a commissioning run it was shown that two of the major background components, external γ-rays from {sup 214}Bi and {sup 208}Tl decays, were suppressed up to two orders of magnitude. We are confident to reach a background index of 10{sup −3} cts/(keV·kg·yr) which is the design goal for GERDA Phase II.

  2. Status of the Gerda phase II experiment

    Energy Technology Data Exchange (ETDEWEB)

    Lazzaro, Andrea [Physik-Department and Excellence Cluster Universe, Technische Universitaet Muenchen (Germany); Collaboration: GERDA-Collaboration

    2016-07-01

    The Gerda experiment searches for the neutrinoless double beta decay (0νββ) in {sup 76}Ge. The first phase of the experiment collected 21.6 kg. yr of exposure with a background index (BI) of 0.01 cts/(keV . kg . yr). No signal was observed and a lower limit for the 0νββ half-life was set to T{sup 0νββ}{sub 1/2} < 2.1 . 10{sup 25} yr (90% C.L). The apparatus has now been upgraded to the Phase II configuration. In Phase II 38 kg of HPGe detectors will be operated to reach an exposure of 100 kg . yr. The goal of Gerda Phase II is to lower the BI to 10{sup -3} cts/(keV . kg . y), in order to reach the sensitivity for T{sup 0νββ}{sub 1/2} = O(10{sup 26}) yr. The additional target mass is constituted of 30 custom made BEGe detectors with higher energy resolution and better pulse shape discrimination performance. The detectors are operated in new radio-pure low-mass holders. The liquid argon surrounding the detectors has been instrumented to veto the background events which produce scintillation light. In this talk the current status and the performance of the Gerda Phase II are presented.

  3. Status of the GERDA Phase II upgrade

    Science.gov (United States)

    Wagner, Victoria

    2016-06-01

    The GERDA experiment is designed to search for neutrinoless double beta (0νββ) decay of 76Ge. In Phase I of the experiment a background index of 10-2 cts/(keV.kg.yr) was reached. A lower limit on the half-life of the 0νββ decay of 76Ge was set to 2.1.1025 yr (at 90% C.L.). The aim of Phase II is to reach a sensitivity of the half-life of about 1026 yr. To increase the exposure thirty new Broad Energy Germanium (BEGe) detectors have been produced. These detectors are distinct for their improved energy resolution and enhanced pulse shape discrimination of signal from background events. Further background reduction will be reached by a light instrumentation to read out argon scintillation light. In April 2015 the light instrumentation together with eight BEGe detectors has been successfully deployed in the GERDA cryostat. In a commissioning run it was shown that two of the major background components, external γ-rays from 214Bi and 208Tl decays, were suppressed up to two orders of magnitude. We are confident to reach a background index of 10-3 cts/(keV.kg.yr) which is the design goal for GERDA Phase II.

  4. Status of the GERDA Phase II upgrade

    International Nuclear Information System (INIS)

    Wagner, Victoria

    2016-01-01

    The GERDA experiment is designed to search for neutrinoless double beta (0νββ) decay of "7"6Ge. In Phase I of the experiment a background index of 10"−"2 cts/(keV·kg·yr) was reached. A lower limit on the half-life of the 0νββ decay of "7"6Ge was set to 2.1·10"2"5 yr (at 90% C.L.). The aim of Phase II is to reach a sensitivity of the half-life of about 10"2"6 yr. To increase the exposure thirty new Broad Energy Germanium (BEGe) detectors have been produced. These detectors are distinct for their improved energy resolution and enhanced pulse shape discrimination of signal from background events. Further background reduction will be reached by a light instrumentation to read out argon scintillation light. In April 2015 the light instrumentation together with eight BEGe detectors has been successfully deployed in the GERDA cryostat. In a commissioning run it was shown that two of the major background components, external γ-rays from "2"1"4Bi and "2"0"8Tl decays, were suppressed up to two orders of magnitude. We are confident to reach a background index of 10"−"3 cts/(keV·kg·yr) which is the design goal for GERDA Phase II.

  5. Neutrinoless double beta decay in Gerda

    Science.gov (United States)

    Grabmayr, Peter; Gerda Collaboration

    2015-10-01

    The Germanium Detector Array (Gerda) experiment searches for the neutrinoless double beta decay in 76Ge. This lepton number violating process is predicted by extensions of the standard model. Gerda follows a staged approach by increasing mass and lowering the background level from phase to phase. Gerda is setup at the Gran Sasso underground laboratory of INFN, Italy. An array of high-purity germanium detectors is lowered directly in liquid argon for shielding and cooling. Further background reduction is achieved by an instrumented water buffer. In Phase I an exposure of 21.6 kg yr was collected at a background level of 10-2 cts/(keV kg yr). The lower limit on the half-life of 76Ge > 2 . 1 .1025 yr (90% C.L.) has been published. Further analyses search for decay into excited states or the accompanied Majoron decay. Presently, Phase II is in preparation which intends to reach a background level of 10-3 cts/(keV kg yr) and to increase the exposure to 100 kg yr. About 20 kg of novel thick-window BEGe (Broad Energy Germanium) detectors will be added and the liquid argon will be instrumented. The status of Phase II preparation and results from the commissioning runs will be presented as well as some further results from Phase I.

  6. [Corynosoma hannae Zdzitowiecki, 1984--a parasite of sea leopard from the Pacific sector of Antarctic].

    Science.gov (United States)

    Striukov, A A; Iurakhno, M V

    2007-01-01

    Specimens of the acanthocephalan Corynosoma hannae Zdzitowiecki, 1984 from the Pacific (Balleni islands) and Atlantic (South Shetland) sectors of Antarctic are compared with those from the Pacific sector of Subantarctic (Auckland and Campbell islands). Probably New Zealand sea lion Phocarctos hookeri (Gray, 1844) is the secondary definitive host for Corynosoma hannae. Description and figures of the specimens examined are provided.

  7. Shielding of the GERDA experiment against external gamma background

    International Nuclear Information System (INIS)

    Barabanov, I.; Bezrukov, L.; Demidova, E.; Gurentsov, V.; Kianovsky, S.; Knoepfle, K.T.; Kornouhkov, V.; Schwingenheuer, B.; Vasenko, A.

    2009-01-01

    The GERmanium Detector Array (GERDA) experiment will search for neutrinoless double beta decay of 76 Ge and is currently under construction at the INFN Laboratori Nazionali del Gran Sasso (LNGS) in Italy. The basic design of GERDA is the use of cryogenic liquid and water of high purity as a superior shield against the hitherto dominant background from external gamma radiation. In this paper we show by Monte Carlo simulations and analytical calculations how GERDA was designed to suppress this background at Q ββ ( 76 Ge)=2039keV to a level of about 10 -4 cts/(keVkgy).

  8. Performance of GERDA phase II BEGe detectors

    Energy Technology Data Exchange (ETDEWEB)

    Wagner, Victoria [Max-Planck Institut fuer Kernphysik (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    The GERDA experiment searches for the lepton number violating neutrinoless double beta (0νββ) decay of {sup 76}Ge. GERDA uses HPGe detectors enriched in {sup 76}Ge as source and detection material. The experiment proceeds in two phases. In Phase I a background index of 10{sup -2} cts/(keV.kg.yr) was reached and a new lower limit on the half-life of the 0νββ decay of {sup 76}Ge was set to 2.1.10{sup 25} yr (at 95% C.L.). In Phase II the background index will be lowered by an order of magnitude and a sensitivity of 10{sup 26} yr will be reached. In order to achieve this goal 30 new custom-made broad energy germanium (BEGe) detectors and a liquid argon scintillation light veto will be deployed. Five BEGe detectors have been operated successfully in Phase I and demonstrated their improved energy resolution and enhanced pulse shape discrimination (PSD) against background events. Special designed electronics will further improve energy resolution and PSD performance. The first results from commissioning of the new BEGe detectors are presented in this talk.

  9. GERDA: Recent results and future plans

    Science.gov (United States)

    Lehnert, Björn

    2014-04-01

    The GERmanium Detector Array (GERDA) is an experiment designed to investigate the neutrinoless double beta decay (0 νββ) in 76Ge. An array of high purity germanium detectors isotopically enriched to 87% of 76Ge is operated within 64 m3 of liquid argon (LAr) at the Laboratori Nazionali del Gran Sasso (LNGS). The experiment aims to explore the 0 νββ half-life up to 1.4×1026 yr with a collected exposure of 100 kg yr separated into two physics phases. The data taking of Phase I started in November 2011 and finished in May 2013 with 21.6 kg yr of exposure and a background index (BI) of 2×10-2cts/(kg yr keV) around the Q-value of 2039 keV before pulse shape cuts. Phase II of the experiment is being prepared with additional 30 Broad Energy Germanium (BEGe) detectors and an instrumentation of the LAr, aiming at a BI reduction by a factor of 10 w.r. to Phase I. This paper will present the GERDA setup and the latest results of the experiment including a new measurement of the 2 νββ spectrum of 76Ge and the decomposition of the background spectrum. The 0 νββ analysis, finished in the meanwhile, will be briefly mentioned. Furthermore, the major improvements planned for Phase II will be discussed.

  10. GERDA: Recent results and future plans

    Energy Technology Data Exchange (ETDEWEB)

    Lehnert, Björn, E-mail: bjoernlehnert@gmail.com

    2014-04-01

    The GERmanium Detector Array (GERDA) is an experiment designed to investigate the neutrinoless double beta decay (0νββ) in {sup 76}Ge. An array of high purity germanium detectors isotopically enriched to 87% of {sup 76}Ge is operated within 64 m{sup 3} of liquid argon (LAr) at the Laboratori Nazionali del Gran Sasso (LNGS). The experiment aims to explore the 0νββ half-life up to 1.4×10{sup 26} yr with a collected exposure of 100 kg yr separated into two physics phases. The data taking of Phase I started in November 2011 and finished in May 2013 with 21.6 kg yr of exposure and a background index (BI) of 2×10{sup −2}cts/(kg yr keV) around the Q-value of 2039 keV before pulse shape cuts. Phase II of the experiment is being prepared with additional 30 Broad Energy Germanium (BEGe) detectors and an instrumentation of the LAr, aiming at a BI reduction by a factor of 10 w.r. to Phase I. This paper will present the GERDA setup and the latest results of the experiment including a new measurement of the 2νββ spectrum of {sup 76}Ge and the decomposition of the background spectrum. The 0νββ analysis, finished in the meanwhile, will be briefly mentioned. Furthermore, the major improvements planned for Phase II will be discussed.

  11. Malenkaja Gerda, spassaja Kaja, begala v muzei / Oleg Peranov

    Index Scriptorium Estoniae

    Peranov, Oleg

    2005-01-01

    Muinasjutufilm H.C. Anderseni järgi "Lumekuninganna" ("Snezhnaja koroleva") : stsenarist Jevgeni Shvarts : režissöör Gennadi Kazanski : Gerda osas 13-aastane Jelena Proklova : NSV Liit (Lenfilm) 1966. Filmivõtetest

  12. Status report of the GERDA experiment phase I

    Energy Technology Data Exchange (ETDEWEB)

    Riboldi, Stefano, E-mail: stefano.riboldi@mi.infn.it [Universita' degli Studi di Milano and INFN, Milano (Italy)

    2013-08-01

    Phase I of GERDA, aimed at investigating neutrino-less double beta decay of {sup 76}Ge is in the active phase since November 2011 at the Gran Sasso National Laboratory of INFN—Italy. GERDA Ge detectors are non-encapsulated and operate immersed in liquid argon, equipped with a front-end readout electronics consisting of cryogenic charge sensitive preamplifiers designed and manufactured to cope with the characteristics of the GERDA experiment (radio-purity, long and resistive cables, etc.). The presentation will report on the current status of the GERDA experiment phase I, focusing on Ge detectors performance in terms of energy resolution, stability over time, counting rate and related issues.

  13. Search for neutrinoless double beta decay beyond GERDA

    Energy Technology Data Exchange (ETDEWEB)

    Schwingenheuer, Bernhard [MPI Kernphysik, Heidelberg (Germany)

    2016-07-01

    The search for neutrinoless double beta decay might be the only window to observe lepton number violation and to determine the nature of neutrinos. Is is therefore considered to be of highest relevance. The isotope Ge-76 has historically been most important for this search and the ongoing experiment GERDA has the lowest background of all experiments in the field. The proposed experimental program beyond GERDA (and Majorana) is presented.

  14. LArGe. A liquid argon scintillation veto for GERDA

    International Nuclear Information System (INIS)

    Heisel, Mark

    2011-01-01

    LArGe is a GERDA low-background test facility to study novel background suppression methods in a low-background environment, for possible applications in the GERDA experiment. GERDA searches for the neutrinoless double-beta decay in 76 Ge, by operating naked germanium detectors submersed into 65 m 3 of liquid argon. Similarly, LArGe runs Ge-detectors in 1 m 3 (1.4 tons) of liquid argon, which in addition is instrumented with photomultipliers to detect argon scintillation light. The light is used in anti-coincidence with the germanium detectors, to effectively suppress background events that deposit energy in the liquid argon. This work adresses the design, construction, and commissioning of LArGe. The background suppression efficiency has been studied in combination with a pulse shape discrimination (PSD) technique for various sources, which represent characteristic backgrounds to GERDA. Suppression factors of a few times 10 3 have been achieved. First background data of LArGe (without PSD) yield a background index of (0.12-4.6).10 -2 cts/(keV.kg.y) (90% c.l.), which is at the level of the Gerda phase I design goal. Furthermore, for the first time we measure the natural 42 Ar abundance (in parallel to Gerda), and have indication for the 2νββ-decay in natural germanium. (orig.)

  15. LArGe. A liquid argon scintillation veto for GERDA

    Energy Technology Data Exchange (ETDEWEB)

    Heisel, Mark

    2011-04-13

    LArGe is a GERDA low-background test facility to study novel background suppression methods in a low-background environment, for possible applications in the GERDA experiment. GERDA searches for the neutrinoless double-beta decay in {sup 76}Ge, by operating naked germanium detectors submersed into 65 m{sup 3} of liquid argon. Similarly, LArGe runs Ge-detectors in 1 m{sup 3} (1.4 tons) of liquid argon, which in addition is instrumented with photomultipliers to detect argon scintillation light. The light is used in anti-coincidence with the germanium detectors, to effectively suppress background events that deposit energy in the liquid argon. This work adresses the design, construction, and commissioning of LArGe. The background suppression efficiency has been studied in combination with a pulse shape discrimination (PSD) technique for various sources, which represent characteristic backgrounds to GERDA. Suppression factors of a few times 10{sup 3} have been achieved. First background data of LArGe (without PSD) yield a background index of (0.12-4.6).10{sup -2} cts/(keV.kg.y) (90% c.l.), which is at the level of the Gerda phase I design goal. Furthermore, for the first time we measure the natural {sup 42}Ar abundance (in parallel to Gerda), and have indication for the 2{nu}{beta}{beta}-decay in natural germanium. (orig.)

  16. Reflections on the work of Hanna Segal (1918-2011).

    Science.gov (United States)

    Steiner, John

    2015-02-01

    This paper is based on a talk given at the conference to celebrate the Work of Hanna Segal and attempts to summarise her contribution to psychoanalysis. I suggest that in addition to being the important presenter of the work of Melanie Klein, she made major contributions to our understanding of many analytic ideas, for example, symbol formation, the usefulness of the concept of the death instinct and the relation between phantasy and reality. She was a pioneer in the analytic treatment of psychosis and sh wrote important papers on literature and aesthetics. She was a great teacher and emphasised the central role played by the analytic setting in representing the attitude of the analyst. Copyright © 2014 Institute of Psychoanalysis.

  17. Geophysical Investigations at the Hanna's Town Cemetery, Westmoreland County, Pennsylvania

    Science.gov (United States)

    Taylor, Ashley D.

    Hanna's Town (36WM203), an 18th century site located in Westmoreland County, Pennsylvania, was a major frontier settlement that was attacked and destroyed by a force of British and Native Americans in 1782. The town never fully recovered, and by the early 1800s, no buildings remained from the settlement. The land was repurposed for agricultural use until it was purchased by the Westmoreland County Historical Society, who reconstructed the town for tourism and educational purposes. In addition to the town, the site also contains a cemetery that currently has five headstones. There are several stone fragments in storage that are no longer associated with burials, providing evidence that the cemetery may contain unmarked graves. Geophysical investigations using ground penetrating radar, magnetometry, and electrical resistance were performed to examine the presence of additional grave shafts in and adjacent to the present-day cemetery.

  18. Flora within no-hunting zone of Hanna, Isfahan, Iran

    Directory of Open Access Journals (Sweden)

    Saied Jamaledin Khajeddin

    2010-04-01

    Full Text Available Floristic studies of a region have many advantages, since the floristic list is a useful identity document which provides the genetic potentials of the area. The area of Hanna no-hunting zone is 20452 ha and is located at the southern part of Isfahan province. In this study the floristic list of the region is presented and their life forms and endangered species are stated. Field data collections were conducted during the years 2007 through 2008. First the studied area boundaries were exposed on a topographic map with a scale of 1:25000. Then, the plant species of the region were collected and identified according to the floras. According to the presented list, there were 307 species belonging to 209 genuses which are classified in 51 families. The Asteraceae has the highest species diversity in the region with 33 genus and 52 species. According to Raunkiaer’s life form criteria, the identified species are categorized as: hemicryptophytes 50.5%, therophytes 23.1%, chamephytes 11.4%, phanerophytes (6.8% and geophytes (8.1%. The high percent occurrence of the perennial species confirms the plant species adaptations to the climatic and edaphic conditions of the region. In the Hanna region, 76 medicinal and industrial species were listed belonging to 67 genera and 29 families. The Asteraceae and Lamiaceae families had 12 and 13 species of the medicinal plant species accordingly and they had the most species diversities in this category among the other families. There were 9 vulnerable species, 28 lower risk and 4 data deficient species in the studied region.

  19. First results from GERDA Phase II

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schulz, O.; Schütz, A.-K.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2017-09-01

    Gerda is designed for a background-free search of 76Ge neutrinoless double-β decay, using bare Ge detectors in liquid Ar. The experiment was upgraded after the successful completion of Phase I to double the target mass and further reduce the background. Newly-designed Ge detectors were installed along with LAr scintillation sensors. Phase II of data-taking started in Dec 2015 with approximately 36 kg of Ge detectors and is currently ongoing. The first results based on 10.8 kg· yr of exposure are presented. The background goal of 10-3 cts/(keV· kg· yr) is achieved and a search for neutrinoless double-β decay is performed by combining Phase I and II data. No signal is found and a new limit is set at T1/20ν > 5.3 \\cdot {1025} yr (90% C.L.).

  20. The Gerda Phase II detector assembly

    Energy Technology Data Exchange (ETDEWEB)

    Bode, Tobias; Schoenert, Stefan [Physik-Department E15, Technische Universitaet Muenchen (Germany); Schwingenheuer, Bernhard [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    Phase II of the Gerda (Germanium Detector Array) experiment will continue the search for the neutrinoless double beta decay (0νββ) of {sup 76}Ge. Prerequisites for Phase II are an increased target mass and a reduced background index of < 10 {sup -3} cts/(keV.kg.yr). Major hardware upgrades to achieve these requirements are scheduled for 2013. They include the deployment of a new radio pure low mass detector assembly. The structural properties of available radio-pure materials and reduction of mass necessitate a change of the electrical contacting used to bias and read-out the detectors. The detector assembly design and the favored contacting solution are presented.

  1. Background modeling for the GERDA experiment

    Science.gov (United States)

    Becerici-Schmidt, N.; Gerda Collaboration

    2013-08-01

    The neutrinoless double beta (0νββ) decay experiment GERDA at the LNGS of INFN has started physics data taking in November 2011. This paper presents an analysis aimed at understanding and modeling the observed background energy spectrum, which plays an essential role in searches for a rare signal like 0νββ decay. A very promising preliminary model has been obtained, with the systematic uncertainties still under study. Important information can be deduced from the model such as the expected background and its decomposition in the signal region. According to the model the main background contributions around Qββ come from 214Bi, 228Th, 42K, 60Co and α emitting isotopes in the 226Ra decay chain, with a fraction depending on the assumed source positions.

  2. Background modeling for the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Becerici-Schmidt, N. [Max-Planck-Institut für Physik, München (Germany); Collaboration: GERDA Collaboration

    2013-08-08

    The neutrinoless double beta (0νββ) decay experiment GERDA at the LNGS of INFN has started physics data taking in November 2011. This paper presents an analysis aimed at understanding and modeling the observed background energy spectrum, which plays an essential role in searches for a rare signal like 0νββ decay. A very promising preliminary model has been obtained, with the systematic uncertainties still under study. Important information can be deduced from the model such as the expected background and its decomposition in the signal region. According to the model the main background contributions around Q{sub ββ} come from {sup 214}Bi, {sup 228}Th, {sup 42}K, {sup 60}Co and α emitting isotopes in the {sup 226}Ra decay chain, with a fraction depending on the assumed source positions.

  3. RELAP5/MOD2 blind calculation of GERDA small break test and data comparison

    International Nuclear Information System (INIS)

    Ogden, D.M.; Steiner, J.L.; Waterman, M.E.

    1985-01-01

    The Idaho National Engineering Laboratory (INEL), in support of the USNRC, has developed a RELAP5/MOD2 model of the GERDA facility to be used for analysis of the GERDA data, particularly relative to the phenomena of natural circulation and the boiler condenser mode of heat transfer. A blind calculation of GERDA Test 1605AA and a preliminary comparison with experimental data has been performed. The GERDA facility is a single loop integral facility with an electrically heated core. A general arrangement diagram of the facility is shown. The GERDA facility was designed for the performance of both separate effects and overall systems tests

  4. Upgrade for Phase II of the Gerda experiment

    Science.gov (United States)

    Agostini, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hiller, R.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Ioannucci, L.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kermaïdic, Y.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Nisi, S.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Ransom, C.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schütz, A.-K.; Schulz, O.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zsigmond, A. J.; Zuber, K.; Zuzel, G.

    2018-05-01

    The Gerda collaboration is performing a sensitive search for neutrinoless double beta decay of ^{76}Ge at the INFN Laboratori Nazionali del Gran Sasso, Italy. The upgrade of the Gerda experiment from Phase I to Phase II has been concluded in December 2015. The first Phase II data release shows that the goal to suppress the background by one order of magnitude compared to Phase I has been achieved. Gerda is thus the first experiment that will remain "background-free" up to its design exposure (100 kg year). It will reach thereby a half-life sensitivity of more than 10^{26} year within 3 years of data collection. This paper describes in detail the modifications and improvements of the experimental setup for Phase II and discusses the performance of individual detector components.

  5. Performance of the LAr scintillation veto of Gerda Phase II

    Energy Technology Data Exchange (ETDEWEB)

    Wiesinger, Christoph [Physik-Department and Excellence Cluster Universe, Technische Universitaet Muenchen, James-Franck-Strasse, 85748 Garching (Germany); Collaboration: GERDA-Collaboration

    2016-07-01

    Gerda is an experiment to search for the neutrinoless double beta decay in {sup 76}Ge. Results of Phase I have been published in summer 2013 and Gerda has been upgraded to Phase II. To reach the aspired background index of ∝10{sup -3} cts/(keV.kg.yr) for Phase II active background-suppression techniques are applied, including an active liquid argon (LAr) veto. It has been demonstrated with the LArGe test facility that the detection of argon scintillation light can be used to effectively suppress background events in the germanium detectors, which simultaneously deposit energy in the LAr. The light instrumentation consisting of photomultiplier tubes (PMT) and wavelength-shifting fibers connected to silicon photomultipliers (SiPM) has been installed in Gerda. In this talk the low background design of the LAr veto and its performance during Phase II start-up is reported.

  6. Performance of the LAr scintillation veto of GERDA Phase II

    Energy Technology Data Exchange (ETDEWEB)

    Wiesinger, Christoph [Technische Universitaet Muenchen, Physik Dept. E15, James-Franck-Strasse, 85748 Garching (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    Gerda is an experiment to search for the neutrinoless double beta decay in {sup 76}Ge. Results of Phase I have been published in summer 2013 and Gerda is upgraded to Phase II. To reach the aspired background index of ≤ 10{sup -3} cts/(keV.kg.yr) for Phase II active background-suppression techniques are applied, including an active liquid argon (LAr) veto. It has been demonstrated with the LArGe test facility that the detection of argon scintillation light can be used to effectively suppress background events in the germanium, which simultaneously deposit energy in the LAr. The light instrumentation consisting of photomultiplier tubes (PMT) and wavelength-shifting fibers connected to silicon multipliers (SiPM) has been installed in Gerda. In this talk the low background design of the LAr veto and its performance during the commissioning runs are reported.

  7. Contemporary art and Hanna Segal's thinking on aesthetics.

    Science.gov (United States)

    Abella, Adela

    2010-02-01

    From the point of view of the history of ideas in psychoanalysis, a major shift may be described from Freud's starting point considering art as sublimation of sexual desires on a largely objectal level to later developments emphasizing the presence in art of destructiveness and narcissistic conflicts. Segal's contribution represents a watershed in this evolution. Following Klein, Hanna Segal suggests considering art in relation to depressive anxieties and reparation in such a way that artistic activity may be seen as an attempt 'to restore and re-create the loved object outside and inside the ego' which implies a successful work of mourning accompanied by symbol formation. For Segal, these reparative processes are conveyed through formal beauty which represents the victory of reparation over destruction. Nevertheless, contemporary art demands that we consider the intervention, in art, of more raw and less symbolized/sublimated processes, including acting-out in often primitive, psychotic or perverse ways. Thus this paper unfolds in two directions: on the one hand, it examines the differences and continuities between Freud's and Segal's thinking whilst, on the other, the author presents some alternative ideas which stress the search for truth and new thinking in contemporary art.

  8. The calibration system of the GERDA muon veto Cherenkov detector

    International Nuclear Information System (INIS)

    Ritter, Florian; Lubsandorzhiev, Bayarto; Freund, Kai; Grabmayr, Peter; Jochum, Josef; Knapp, Markus; Meierhofer, Georg; Shaibonov, Bator

    2010-01-01

    The GERDA experiment searches for neutrinoless double beta decay (0νββ). To achieve a sensitivity of 10 -3 counts/(keVkgy) or better within a specific region of interest (ROI), a good background identification is needed. Therefore GERDA is located in the LNGS (Laboratori Nationali del Gran Sasso) underground facility. In addition to the good rejection of cosmic muons due to the surrounding bedrocks, a dual muon veto system has to be used. For calibration and monitoring of the muon veto, two separate systems have been developed.

  9. Characterisation of GERDA Phase-I detectors in liquid argon

    Energy Technology Data Exchange (ETDEWEB)

    Barnabe Heider, Marik; Schoenert, Stefan [Max-Planck-Institut fuer Kernphysik (Germany); Gusev, Konstantin [Russian Research Center, Kurchatov Institute (Russian Federation); Joint Institute for Nuclear Research (Russian Federation)

    2009-07-01

    GERDA will search for neutrinoless double beta decay in {sup 76}Ge by submerging bare enriched HPGe detectors in liquid argon. In GERDA Phase-I, reprocessed enriched-Ge detectors, which were previously operated by the Heidelberg-Moscow and IGEX collaborations, and reprocessed natural-Ge detectors from Genius-TF, will be redeployed. We have tested the operation and performance of bare HPGe detectors in liquid nitrogen and in liquid argon over more than three years with three non-enriched p-type prototype detectors. The detector handling and mounting procedures have been defined and the Phase-I detector technology, the low-mass assembly and the long-term stability in liquid argon have been tested successfully. The Phase-I detectors were reprocessed by Canberra Semiconductor NV, Olen, according to their standard technology but without the evaporation of a passivation layer. After their reprocessing, the detectors have been mounted in their low-mass holders and their characterisation in liquid argon performed. The leakage current, the counting characteristics and the efficiency of the detectors have been measured. The testing of the detectors was carried out in the liquid argon test stand of the GERDA underground Detector Laboratory (GDL) at LNGS. The detectors are now stored underground under vacuum until their operation in GERDA.

  10. Embracing "All But My Life" by Gerda Weissmann Klein.

    Science.gov (United States)

    Foster, Harold M.

    1997-01-01

    Discusses Gerda Weissmann Klein's book, "All But My Life," which chronicles the author's journey from a normal young (Jewish) woman to a slave in Nazi labor camps for six years. Argues that the book is well written, has characters of depth and complexity, affirms life through the ordeal of the Holocaust, and is a popular book with…

  11. Neutrinoless double beta decay in GERDA Phase II

    International Nuclear Information System (INIS)

    Macolino, C.

    2014-01-01

    The GERmanium Detector Array, GERDA, is designed to search for neutrinoless double beta (0νββ) decay of 76 Ge and it is installed in the Laboratori Nazionali del Gran Sasso (LNGS) of INFN, Italy. The GERDA experiment has completed the Phase I with a total collected exposure of 21.6 kg yr and a background index (BI) of the order of BI ≃ 10 −2 cts/(keVkg yr). No excess of events from 0νββ decay has been observed and a lower limit on the half-life on the 0νββ decay for 76 Ge has been estimated: T 0ν 1 /2 > 2.1·10 25 yr at 90% CL. The goal of GERDA Phase II is to reach the target sensitivity of T 0ν 1 /2 ≃ 1.4 · 10 26 yr, with an increased total mass of the enriched material and a reduced background level. In this paper the results from GERDA Phase I and the major improvements planned for Phase II are discussed.

  12. Results on neutrinoless double beta decay from GERDA phase I

    CERN Multimedia

    CERN. Geneva

    2013-01-01

    After motivating searches of double beta decay and lepton number violation details about the construction, operation and analysis of GERDA will be given. Results of the recently completed phase I of data taking will then be presented and interpreted. Finally an outlook on future plans will be given.

  13. The background in the experiment Gerda

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Andreotti, E.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barnabé Heider, M.; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Cossavella, F.; Demidova, E. V.; Domula, A.; Egorov, V.; Falkenstein, R.; Ferella, A.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gotti, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Guthikonda, K. K.; Hampel, W.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Ioannucci, L.; Csáthy, J. Janicskó; Jochum, J.; Junker, M.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Liu, X.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Machado, A. A.; Majorovits, B.; Maneschg, W.; Nemchenok, I.; Nisi, S.; O'Shaughnessy, C.; Palioselitis, D.; Pandola, L.; Pelczar, K.; Pessina, G.; Pullia, A.; Riboldi, S.; Sada, C.; Salathe, M.; Schmitt, C.; Schreiner, J.; Schulz, O.; Schwingenheuer, B.; Schönert, S.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Strecker, H.; Tarka, M.; Ur, C. A.; Vasenko, A. A.; Volynets, O.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2014-04-01

    The GERmanium Detector Array ( Gerda) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double beta () decay of Ge. The signature of the signal is a monoenergetic peak at 2039 keV, the value of the decay. To avoid bias in the signal search, the present analysis does not consider all those events, that fall in a 40 keV wide region centered around . The main parameters needed for the analysis are described. A background model was developed to describe the observed energy spectrum. The model contains several contributions, that are expected on the basis of material screening or that are established by the observation of characteristic structures in the energy spectrum. The model predicts a flat energy spectrum for the blinding window around with a background index ranging from 17.6 to 23.8 cts/(keV kg yr). A part of the data not considered before has been used to test if the predictions of the background model are consistent. The observed number of events in this energy region is consistent with the background model. The background at is dominated by close sources, mainly due to K, Bi, Th, Co and emitting isotopes from the Ra decay chain. The individual fractions depend on the assumed locations of the contaminants. It is shown, that after removal of the known peaks, the energy spectrum can be fitted in an energy range of 200 keV around with a constant background. This gives a background index consistent with the full model and uncertainties of the same size.

  14. Germanium detector studies in the framework of the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Budjas, Dusan

    2009-05-06

    The GERmanium Detector Array (GERDA) is an ultra-low background experiment under construction at Laboratori Nazionali del Gran Sasso. GERDA will search for {sup 76}Ge neutrinoless double beta decay with an aim for 100-fold reduction in background compared to predecessor experiments. This ambition necessitates innovative design approaches, strict selection of low-radioactivity materials, and novel techniques for active background suppression. The core feature of GERDA is its array of germanium detectors for ionizing radiation, which are enriched in {sup 76}Ge. Germanium detectors are the central theme of this dissertation. The first part describes the implementation, testing, and optimisation of Monte Carlo simulations of germanium spectrometers, intensively involved in the selection of low-radioactivity materials. The simulations are essential for evaluations of the gamma ray measurements. The second part concerns the development and validation of an active background suppression technique based on germanium detector signal shape analysis. This was performed for the first time using a BEGe-type detector, which features a small read-out electrode. As a result of this work, BEGe is now one of the two detector technologies included in research and development for the second phase of the GERDA experiment. A suppression of major GERDA backgrounds is demonstrated, with (0.93{+-}0.08)% survival probability for events from {sup 60}Co, (21{+-}3)% for {sup 226}Ra, and (40{+-}2)% for {sup 228}Th. The acceptance of {sup 228}Th double escape events, which are analogous to double beta decay, was kept at (89{+-}1)%. (orig.)

  15. Marko Mägi soovitab : Dave Benton ja Hanna-Liina Võsa / Marko Mägi

    Index Scriptorium Estoniae

    Mägi, Marko

    2005-01-01

    Lauljate Dave Bentoni ja Hanna-Liina Võsa kontserttuurist: 25. veebr Ammende villas Pärnus, 26. veebr. Kalvi mõisas, 4. märtsil Saku mõisas, 6. märtsil Sangaste lossis ja 13. apr. Estonia kontserdisaalis

  16. Hanna-Liina ja Dave Benton laulavad koos armastuslaule / Ille Grün-Ots

    Index Scriptorium Estoniae

    Grün-Ots, Ille, 1960-2016

    2005-01-01

    Vanemuises L. Bernsteini muusikalis "West Side Story" laulvast Hanna-Liina Võsast, heliplaadist "Premi'ere", kontsertidest koos Dave Bentoniga 4. märtsil Saku mõisas, 6. märtsil Sangaste lossis ja 25. veebr. Ammende villas Pärnus

  17. The New Mexico Reform Story: Will Hanna Skandera's Legacy Last?

    Science.gov (United States)

    McShane, Michael Q.

    2018-01-01

    As public education secretary of New Mexico, Hanna Skandera dug in fast, set an ambitious agenda, and broke a lot of china. Her ability to inspire and subsequently ignore controversy is clear: from the outset, she was deemed so contentious that the state senate refused to confirm her for four years, during which she performed her duties as…

  18. GERDA - a new neutrinoless double beta experiment using 76Ge

    International Nuclear Information System (INIS)

    Meierhofer, G

    2011-01-01

    The search for neutrinoless double beta decay (0νssss) has been a very active field for the last decades. While double beta decay has been observed, 0νssss decay still waits for its experimental proof. The GErmanium Detector Array (GERDA) uses 76 Ge, an ideal candidate as it is acting as source and detector simultaneously. Germanium detectors, isotopically enriched in 76 Ge are submerged directly into an ultra pure cryo liquid, which serves as coolant and radiation shield. This concept will allow to reduce the background by up to two orders of magnitude with respect to earlier experiments. GERDA has been constructed in hall A of the underground laboratory LNGS of the INFN in Italy. The experiment started recently with a test run.

  19. Annual modulation of the muon flux in the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Falkenstein, Raphael; Freund, Kai; Grabmayr, Peter; Hegai, Alexander; Jochum, Josef; Schmitt, Christopher; Schuetz, Ann-Kathrin [Eberhard Karls Univeritaet Tuebingen (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    The Gerda collaboration aims to determine the half life of the neutrinoless double beta decay (0νββ) of {sup 76}Ge. In Phase I, the experimental background was reduced to 10{sup -2} cts/(keV.kg.yr) in the region around Q{sub ββ}. For Phase II we want to reduce the background contribution by one order of magnitude. Cosmic muons induce part of this dangerous background and must be vetoed. The muon veto consists of a water Cherenkov detector with 66 PMTs in the water tank surrounding the Gerda cryostat which contains the germanium crystals. The muon veto operated stably for 806 days where only 2 PMTs were lost. The rate however is modulated by the Cngs neutrino beam and the atmospheric temperature effect, both will be presented in this talk.

  20. Study of the GERDA Phase II background spectrum

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schulz, O.; Schütz, A.-K.; Schwingenheuer, B.; Selivanenko, O.; Shevzik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2017-09-01

    The Gerda experiment, located at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN in Italy, searches for the neutrinoless double beta (0νββ) decay of 76Ge. Gerda Phase II is aiming to reach a sensitivity for the 0νββ half life of 1026 yr in ˜ 3 years of physics data taking with 100 kg·yr of exposure and a background index of ˜ 10-3 cts/(keV·kg·yr). After 6 months of acquisition a first data release with 10.8 kg·yr of exposure is performed, showing that the design background is achieved. In this work a study of the Phase II background spectrum, the main spectral structures and the background sources will be presented and discussed.

  1. Performance of BEGe detectors for GERDA Phase II

    Energy Technology Data Exchange (ETDEWEB)

    Lazzaro, Andrea [Physik-Department E15, Technische Universitaet Muenchen (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    After the end of the data-taking for GERDA Phase I, the apparatus has been upgraded to fulfill the requirements of the second phase. Phase II sensitivity will be driven by 30 custom made BEGe detectors. This detectors are now available and can be operated in phaseII configuration in the GERDA cryostat together with the liquid argon scintillation veto. The performances of BEGe detectors in liquid argon are presented in this talk. Besides the spectroscopy capability, the focus will be placed on the expectations in terms of background rejection via pulse shape discrimination (PSD). In particular the main goal the BEGe's pulse shape analysis is to discriminate surface events produced by beta emitters (e.g. {sup 42}K) present in the liquid Ar.

  2. Status report of the Gerda Phase II startup

    International Nuclear Information System (INIS)

    D’Andrea, Valerio

    2017-01-01

    The GERmanium Detector Array (Gerda) experiment, located at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN, searches for 0νββ of "7"6Ge. Germanium diodes enriched to ∼ 86 % in the double beta emitter "7"6Ge ("e"n"rGe) are exposed being both source and detector of 0νββ decay. This process is considered a powerful probe to address still open issues in the neutrino sector of the (beyond) Standard Model of particle Physics. Since 2013, at the completion of the first experimental phase (Phase I), the Gerda setup has been upgraded to perform its next step (Phase II). The aim is to reach a sensitivity to the 0νββ decay half life larger than 10"2"6 yr in about 3 years of physics data taking, exposing a detector mass of about 35 kg of "e"n"rGe with a background index of about 10"−"3cts/(keV·kg·yr). One of the main new implementations is the liquid argon (LAr) scintillation light read-out, to veto those events that only partially deposit their energy both in Ge and in the surrounding LAr. In this paper the Gerda Phase II expected goals, the upgraded items and few selected features from the first 2016 physics and calibration runs will be presented. The main Phase I achievements will be also reviewed.

  3. Status report of the Gerda Phase II startup

    Science.gov (United States)

    D'Andrea, Valerio; Gerda Collaboration

    2017-01-01

    The GERmanium Detector Array (GERDA) experiment, located at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN, searches for 0νββ of 76Ge . Germanium diodes enriched to ˜ 86 % in the double beta emitter 76Ge ( enrGe are exposed being both source and detector of 0νββ decay. This process is considered a powerful probe to address still open issues in the neutrino sector of the (beyond) Standard Model of particle Physics. Since 2013, at the completion of the first experimental phase (Phase I), the GERDA setup has been upgraded to perform its next step (Phase II). The aim is to reach a sensitivity to the 0νββ decay half-life larger than 10^{26} yr in about 3 years of physics data taking, exposing a detector mass of about 35 kg of enrGe with a background index of about 10^{-3} cts/(keV . kg . yr). One of the main new implementations is the liquid argon (LAr) scintillation light read-out, to veto those events that only partially deposit their energy both in Ge and in the surrounding LAr. In this paper the GERDA Phase II expected goals, the upgraded items and few selected features from the first 2016 physics and calibration runs will be presented. The main Phase I achievements will be also reviewed.

  4. A liquid argon scintillation veto for the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Wegmann, Anne [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2014-07-01

    Gerda is an experiment to search for the neutrinoless double beta decay of {sup 76}Ge. Results of Phase I have been published in summer 2013. Currently Gerda is being upgraded to a second phase. To reach the aspired background index of ≤ 10{sup -3} cts/(keV . kg . yr) for Phase II active background-suppression techniques will be applied, including an active liquid argon veto (LAr veto). It has been demonstrated by the LArGe test facility that the detection of argon scintillation light can be used to effectively suppress background events in the germanium, which simultaneously deposit energy in LAr. This talk focusses on the light instrumentation which is being installed in GERDA. Photomultiplier tubes (PMT) and wavelength-shifting fibers connected to silicon photomultipliers (SiPM) are combined to maximize the photoelectron-yield with respect to various background sources. Monte Carlo simulations have been performed to optimize the design for background suppression and low self-induced background. First results of the prototypes and the progress of installation are reported.

  5. Desponte dos ramos da videira e seu efeito na qualidade dos frutos de 'Merlot' sobre os porta-enxertos 'Paulsen 1103' e 'Couderc 3309' Shoot topping on Merlot grapevines grafted on Paulsen 1103 and Couderc 3309 and its effects on the quality of grapes

    Directory of Open Access Journals (Sweden)

    Alberto Fontanella Brighenti

    2010-03-01

    Full Text Available A produção de uvas viníferas nas regiões de altitude do Estado de Santa Catarina é recente e existem poucos dados de pesquisa sobre o comportamento das diferentes cultivares neste local. Os objetivos do trabalho foram testar o efeito de diferentes níveis de desponte do dossel vegetativo e avaliar a influência de dois porta-enxertos nas características dos frutos produzidos. O experimento foi realizado em São Joaquim-SC (28º17'38" S e 49º55'54" W, a uma altitude média de 1.250 m, na Vinícola Villa Francioni, com a cultivar Merlot enxertada em 'Paulsen 1103' e 'Couderc 3309'. Os tratamentos consistiram no desponte em diferentes níveis, mantendo as áreas foliares de 4,5; 2,5; 2,0 e 1,5 m² kg-1 de uva em dois porta-enxertos. Foram avaliados número de bagas por cacho, diâmetro de bagas, pH, sólidos solúveis totais, antocianinas, índice de polifenóis totais, comprimento e peso de cacho. As plantas enxertadas em 'Paulsen 1103' apresentaram a máxima eficiência para o nível de desponte de 3,4 m² kg-1de uva, já as plantas enxertadas sobre 'Couderc 3309' apresentaram a máxima eficiência com a manutenção de uma área foliar de 3,0 m² kg-1 de uva. Os diferentes porta-enxertos não interferiram nos compostos fenólicos dos frutos. No ciclo de 2005/06, Couderc 3309 produziu frutos com maiores teores de sólidos solúveis totais e, no ciclo de 2006/07, produziu cachos mais pesados.The production of grapevines in regions of high altitude of Santa Catarina state is recent and there are few data on the behavior of different cultivars. The objective of this work was to verify the effect of different levels of shoot topping and evaluate the influence of two rootstocks on the characteristics of the fruit produced. The experiment was conducted in the city of São Joaquim, Santa Catarina state (28º17'38" S and 49º55'54" W, in an altitude of 1.250m, at Villa Francioni Vineyards, with Merlot grapevine grafted on Paulsen 1103 and Couderc

  6. Currents, Ice Velocity, Temperature, and Salinity from moorings around Hanna Shoal, Chukchi Sea, 2012-2014 (NCEI Accession 0163833)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — These data were collected as part of the physical oceanographic component of the Chukchi Sea Offshore Monitoring in Drilling Area (COMIDA) Hanna Shoal Ecosystem...

  7. Why is the conclusion of the Gerda experiment not justified

    Science.gov (United States)

    Klapdor-Kleingrothaus, H. V.; Krivosheina, I. V.

    2013-12-01

    The first results of the GERDA double beta experiment in Gran Sasso were recently presented. They are fully consistent with the HEIDELBERG-MOSCOW experiment, but because of its low statistics cannot proof anything at this moment. It is no surprise that the statistics is still far from being able to test the signal claimed by the HEIDELBERG-MOSCOW experiment. The energy resolution of the coaxial detectors is a factor of 1.5 worse than in the HEIDELBERG-MOSCOW experiment. The original goal of background reduction to 10-2 counts/kg y keV, or by an order of magnitude compared to the HEIDELBERG-MOSCOW experiment, has not been reached. The background is only a factor 2.3 lower if we refer it to the experimental line width, i.e. in units counts/kg y energy resolution. With pulse shape analysis ( PSA) the back-ground in the HEIDELBERG-MOSCOW experiment around Q ββ is 4 × 10-3 counts/kg y keV [1], which is a factor of 4 (5 referring to the line width) lower than that of GERDA with pulse shape analysis. The amount of enriched material used in the GERDA measurement is 14.6 kg, only a factor of 1.34 larger than that used in the HEIDELBERG-MOSCOW experiment. The background model is oversimplified and not yet adequate. It is not shown that the lines of their background can be identified. GERDA has to continue the measurement further ˜5 years, until they can responsibly present an understood background. The present half life limit presented by GERDA of T {1/2/0v} > 2.1 × 1025 y (90% confidence level, i.e. 1.6ρ) is still lower than the half-life of T {1/2/0v} = 2.23{-0.31/+0.44} × 1025 y [1] determined in the HEIDELBERG-MOSCOW experiment.

  8. Sexualcoercion: Woman Subordination Undergone By Hanna X In Andre Brink's The Otherside Of Silence Novel

    OpenAIRE

    NUSANTI, RIHAN

    2014-01-01

    Nusanti, Rihan. 2014. “Sexual Coercion: Woman Subordination Undergoneby Hanna X in Andre Brink's The Otherside of Silence novel”. Study Programof English, Department of Languages and Literature, Faculty of Cultural Studies,Universitas Brawijaya. Supervisor: Fariska Pujiyanti, M.Hum; Co-supervisor: Winda Candra Hantari,M.A. Keywords: Feminist-Marxist, sexual coercion, patriarchy, women subordination,German women In traditional view, women occupy secondary position lower than men in society. It...

  9. Results from phase I of the GERDA experiment

    International Nuclear Information System (INIS)

    Wester, Thomas

    2015-01-01

    The GERmanium Detector Array Gerda at the Laboratori Nazionali del Gran Sasso of the INFN in Italy is an experiment dedicated to the search for the neutrinoless double beta (0νββ) decay in 76 Ge. The experiment employs high purity germanium detectors enriched in 76 Ge inside a 64 m 3 cryostat filled with liquid argon. Gerda was planned in two phases of data taking with the goal to reach a half-life sensitivity in the order of 10 26 yr. Phase I of Gerda was running from November 2011 until May 2013. With about 18 kg total detector mass, data with an exposure of 21.6 kg·yr was collected and a background index of 0.01 cts/(keV·kg·yr) was achieved in the region of interest. No signal was found for the 0νββ decay and a new limit of T 1/2 > 2.1 · 10 25 yr (90% C.L.) was obtained, strongly disfavoring the previous claim of observation. Furthermore, the 2νββ decay half-life of 76 Ge was measured with unprecedented precision. Other results include new half-life limits of the order of 10 23 yr for Majoron emitting double beta decay modes with spectral indices n = 1, 2, 3, 7 and new limits in the order of 10 23 yr for 2νββ decays to the first 3 excited states of 76 Se. In Phase II, currently in preparation, the detector mass will be doubled while reducing the background index by a factor of 10

  10. Results from phase I of the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Wester, Thomas [Institute of Nuclear and Particle Physics, TU Dresden, Zellescher Weg 19, Germany thomas.wester@tu-dresden.de (Germany)

    2015-10-28

    The GERmanium Detector Array Gerda at the Laboratori Nazionali del Gran Sasso of the INFN in Italy is an experiment dedicated to the search for the neutrinoless double beta (0νββ) decay in {sup 76}Ge. The experiment employs high purity germanium detectors enriched in {sup 76}Ge inside a 64 m{sup 3} cryostat filled with liquid argon. Gerda was planned in two phases of data taking with the goal to reach a half-life sensitivity in the order of 10{sup 26} yr. Phase I of Gerda was running from November 2011 until May 2013. With about 18 kg total detector mass, data with an exposure of 21.6 kg·yr was collected and a background index of 0.01 cts/(keV·kg·yr) was achieved in the region of interest. No signal was found for the 0νββ decay and a new limit of T{sub 1/2} > 2.1 · 10{sup 25} yr (90% C.L.) was obtained, strongly disfavoring the previous claim of observation. Furthermore, the 2νββ decay half-life of {sup 76}Ge was measured with unprecedented precision. Other results include new half-life limits of the order of 10{sup 23} yr for Majoron emitting double beta decay modes with spectral indices n = 1, 2, 3, 7 and new limits in the order of 10{sup 23} yr for 2νββ decays to the first 3 excited states of {sup 76}Se. In Phase II, currently in preparation, the detector mass will be doubled while reducing the background index by a factor of 10.

  11. Results from phase I of the GERDA experiment

    Science.gov (United States)

    Wester, Thomas

    2015-10-01

    The GERmanium Detector Array Gerda at the Laboratori Nazionali del Gran Sasso of the INFN in Italy is an experiment dedicated to the search for the neutrinoless double beta (0νββ) decay in 76Ge. The experiment employs high purity germanium detectors enriched in 76Ge inside a 64 m3 cryostat filled with liquid argon. Gerda was planned in two phases of data taking with the goal to reach a half-life sensitivity in the order of 1026 yr. Phase I of Gerda was running from November 2011 until May 2013. With about 18 kg total detector mass, data with an exposure of 21.6 kg.yr was collected and a background index of 0.01 cts/(keV.kg.yr) was achieved in the region of interest. No signal was found for the 0νββ decay and a new limit of T1/2 > 2.1 . 1025 yr (90% C.L.) was obtained, strongly disfavoring the previous claim of observation. Furthermore, the 2νββ decay half-life of 76Ge was measured with unprecedented precision. Other results include new half-life limits of the order of 1023 yr for Majoron emitting double beta decay modes with spectral indices n = 1, 2, 3, 7 and new limits in the order of 1023 yr for 2νββ decays to the first 3 excited states of 76Se. In Phase II, currently in preparation, the detector mass will be doubled while reducing the background index by a factor of 10.

  12. The GERDA Neutrinoless Double Beta-Decay Experiment

    International Nuclear Information System (INIS)

    Majorovits, Bela A.

    2007-01-01

    Neutrinoless double beta (0νββ)-decay is the key process to gain understanding of the nature of neutrinos. The GErmanium Detector Array (GERDA) is designed to search for 0νββ-decay of the isotope 76 Ge. Germanium crystals enriched in 76 Ge, acting as source and detector simultaneously, will be submerged directly into an ultra pure cooling medium that also serves as a radiation shield. This concept will allow for a reduction of the background by up to two orders of magnitudes with respect to earlier experiments

  13. The performance of the Muon Veto of the Gerda experiment

    Energy Technology Data Exchange (ETDEWEB)

    Freund, K.; Falkenstein, R.; Grabmayr, P.; Hegai, A.; Jochum, J.; Knapp, M.; Ritter, F.; Schmitt, C.; Schuetz, A.K. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Lubsandorzhiev, B. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Jitnikov, I.; Shevchik, E.; Shirchenko, M.; Zinatulina, D. [Joint Institute for Nuclear Research, Dubna (Russian Federation)

    2016-05-15

    Low background experiments need a suppression of cosmogenically induced events. The Gerda experiment located at Lngs is searching for the 0νββ decay of {sup 76}Ge. It is equipped with an active muon veto the main part of which is a water Cherenkov veto with 66 PMTs in the water tank surrounding the Gerda cryostat. With this system 806 live days have been recorded, 491 days were combined muon-germanium data. A muon detection efficiency of ε{sub μd} = (99.935 ± 0.015)% was found in a Monte Carlo simulation for the muons depositing energy in the germanium detectors. By examining coincident muon-germanium events a rejection efficiency of ε{sub μr} = (99.2{sub -0.4}{sup +0.3})% was found. Without veto condition the muons by themselves would cause a background index of BI{sub μ} = (3.16 ± 0.85) x 10{sup -3} cts/(keV . kg . year) at Q{sub ββ}. (orig.)

  14. ICP MS selection of radiopure materials for the GERDA experiment

    Science.gov (United States)

    di Vacri, M. L.; Nisi, S.; Cattadori, C.; Janicsko, J.; Lubashevskiy, A.; Smolnikov, A.; Walter, M.

    2015-08-01

    The GERDA (GERmanium Detector Array) experiment, located in the Gran Sasso Underground Laboratory (LNGS, Italy) aims to search for neutrinoless double beta (0νββ) decay of the 76Ge isotope. Both an ultra-low radioactivity background environment and active techniques to abate the residual background are required to reach the background index (of 10-3 counts/keV kg y) at the Qββ. In order to veto and suppress those events that partially deposit energy in Ge detectors, the readout of liquid argon (LAr) scintillation light (SL) has been implemented for the second GERDA experimental Phase. A double veto system has been designed and constructed using highly radiopure materials (scintillating fibers, wavelength shifters, polymeric foils, reflective foils). This work describes the study of lead, thorium and uranium ultra-trace content, performed at the LNGS Chemistry Laboratory by High Resolution Mass Spectrometry (HR ICP MS), for the selection of all materials involved in the construction of the veto system

  15. ICP MS selection of radiopure materials for the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Di Vacri, M. L., E-mail: divacrim@lngs.infn.it [INFN, Laboratori Nazionali del Gran Sasso, via G.Acitelli 22, 67100 Assergi (Italy); Dipartimento di Scienze Fisiche e Chimiche, University of L’Aquila, via Vetoio, 67100 L’Aquila (Italy); Nisi, S., E-mail: nisi@lngs.infn.it [INFN, Laboratori Nazionali del Gran Sasso, via G.Acitelli 22, 67100 Assergi (AQ) (Italy); Cattadori, C., E-mail: cattadori@lngs.infn.it [INFN Sezione di Milano Bicocca, Milano (Italy); Janicsko, J. [TUM Munich (Germany); Lubashevskiy, A. [MPIK, Heidelberg (Germany); JINR, Dubna (Russian Federation); Smolnikov, A. [MPIK, Heidelberg (Germany); Walter, M. [Physik-Institut, Universitat Zurich, 8057 Zurich (Switzerland)

    2015-08-17

    The GERDA (GERmanium Detector Array) experiment, located in the Gran Sasso Underground Laboratory (LNGS, Italy) aims to search for neutrinoless double beta (0νββ) decay of the {sup 76}Ge isotope. Both an ultra-low radioactivity background environment and active techniques to abate the residual background are required to reach the background index (of 10{sup −3} counts/keV kg y) at the Q{sub ββ}. In order to veto and suppress those events that partially deposit energy in Ge detectors, the readout of liquid argon (LAr) scintillation light (SL) has been implemented for the second GERDA experimental Phase. A double veto system has been designed and constructed using highly radiopure materials (scintillating fibers, wavelength shifters, polymeric foils, reflective foils). This work describes the study of lead, thorium and uranium ultra-trace content, performed at the LNGS Chemistry Laboratory by High Resolution Mass Spectrometry (HR ICP MS), for the selection of all materials involved in the construction of the veto system.

  16. Background rejection of n+ surface events in GERDA Phase II

    Science.gov (United States)

    Lehnert, Björn

    2016-05-01

    The GERDA experiment searches for neutrinoless double beta (0vββ) decay in 76Ge using an array of high purity germanium (HPGe) detectors immersed in liquid argon (LAr). Phase II of the experiment uses 30 new broad energy germanium (BEGe) detectors with superior pulse shape discrimination capabilities compared to the previously used semi-coaxial detector design. By far the largest background component for BEGe detectors in GERDA are n+-surface events from 42K β decays which are intrinsic in LAr. The β particles with up to 3.5 MeV can traverse the 0.5 to 0.9 mm thick electrode and deposit energy within the region of interest for the 0vββ decay. However, those events have particular pulse shape features allowing for a strong discrimination. The understanding and simulation of this background, showing a reduction by up to a factor 145 with pulse shape discrimination alone, is presented in this work.

  17. Searching Neutrinoless Double Beta Decay with GERDA Phase II

    Science.gov (United States)

    Agostini, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Bettini, A.; Bezrukov, L.; Bode, T.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Comellato, T.; D’Andrea, V.; Demidova, E. V.; di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Gangapshev, A.; Garfagnini, A.; Giordano, M.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hahne, C.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hiller, R.; Hofmann, W.; Holl, P.; Hult, M.; Inzhechik, L. V.; Ioannucci, L.; Csáthy, J. Janicskó; Jochum, J.; Junker, M.; Kazalov, V.; Kermaidic, Y.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Marissens, G.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Nisi, S.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Ransom, C.; Reissfelder, M.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Sala, E.; Salamida, F.; Schmitt, C.; Schneider, B.; Schreiner, J.; Schulz, O.; Schweisshelm, B.; Schwingenheuer, B.; Schönert, S.; Schütz, A.-K.; Seitz, H.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zschocke, A.; Zsigmond, A. J.; Zuber, K.; Zuzel, G.

    An observation of neutrinoless double beta (0νββ) decay would allow to shed light onto the nature of neutrinos. GERDA (GERmanium Detector Array) aims to discover this process in a background-free search using 76Ge. The experiment is located at the Laboratori Nazionali del Gran Sasso (LNGS) of the Istituto Nazionale di Fisica Nucleare (INFN) in Italy. Bare, isotopically enriched, high purity germanium detectors are operated in liquid argon. GERDA follows a staged approach. In Phase II 35.6 kg of enriched germanium detectors are operated since December 2015. The application of active background rejection methods, such as a liquid argon scintillation light read-out and pulse shape discrimination of germanium detector signals, allows to reduce the background index to the intended level of 10‑3 cts/(keVṡkgṡyr). No evidence for the 0νββ decay has been found in 23.2 kgṡyr of Phase II data, and together with data from Phase I the up-to-date most stringent half-life limit for this process in 76Ge has been established, at a median sensitivity of 5.8ṡ1025yr the 90% C.L. lower limit is 8.0ṡ1025yr.

  18. Off-line data processing and analysis for the GERDA experiment

    International Nuclear Information System (INIS)

    Agostini, M; Pandola, L; Zavarise, P

    2012-01-01

    Gerda is an experiment designed to look for the neutrinoless double beta decay of 76 Ge. The experiment uses an array of high-purity germanium detectors (enriched in 76 Ge) directly immersed in liquid argon. Gerda is presently operating eight enriched coaxial detectors (approximately 15 kg of 76 Ge) and about 25 new custom-made enriched BEGe detectors will be deployed in the next phase (additional 20kg of 76 Ge). The paper describes the Gerda off-line analysis of the high-purity germanium detector data. Firstly we present the signal processing flow, focusing on the digital filters and on the algorithms used. Secondly we discuss the rejection of non-physical events and the data quality monitoring. The analysis is performed completely with the Gerda software framework (Gelatio), designed to support a multi-channel processing and to perform a modular analysis of digital signals.

  19. Search for the neutrinoless ββ decay in 76Ge with the GERDA experiment

    International Nuclear Information System (INIS)

    Cattadori, C.; Knapp, M.; Kröninger, K.; Liu, X.; Pandola, L.; Pullia, A.; Tomei, C.; Ur, C.; Zocca, F.

    2011-01-01

    The GERmanium Detector Array, GERDA, [Gerda Collaboration, Abt I et al., Proposal, a (http://www.mpi-hd.mpg.de/ge76/home.html)] is designed to search for neutrinoless double beta (0νββ)-decay of 76 Ge. The importance of such a search is emphasized by the evidence of a non-zero neutrino mass from flavour oscillation experiments and by the recent claim [Klapdor-Kleingrothaus H V et al., Phys. Lett. B 586, 198 (2004)] based on data of the Heidelberg-Moscow experiment. GERDA will be installed in the Hall A of the Gran Sasso underground Laboratory (LNGS), Italy. The construction of GERDA will start in 2006.

  20. Phase II Upgrade of the GERDA Experiment for the Search of Neutrinoless Double Beta Decay

    Science.gov (United States)

    Majorovits, B.

    Observation of neutrinoless double beta decay could answer the question regarding the Majorana or Dirac nature of neutrinos. The GERDA experiment utilizes HPGe detectors enriched with the isotope 76Ge to search for this process. Recently the GERDA collaboration has unblinded data of Phase I of the experiment. In order to further improve the sensitivity of the experiment, additionally to the coaxial detectors used, 30 BEGe detectors made from germanium enriched in 76Ge will be deployed in GERDA Phase II. BEGe detectors have superior PSD capability, thus the background can be further reduced. The liquid argon surrounding the detector array will be instrumented in order to reject background by detecting scintillation light induced in the liquid argon by radiation. After a short introduction the hardware preparations for GERDA Phase II as well as the processing and characterization of the 30 BEGe detectors are discussed.

  1. Improvement of the energy resolution via an optimized digital signal processing in GERDA Phase I

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Vacri, A. di; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Fedorova, O.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, ********************M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schütz, A.-K.; Schulz, O.; Schwingenheuer, B.; Selivanenko, O.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Stepaniuk, M.; Ur, C. A.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wilsenach, H.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2015-06-01

    An optimized digital shaping filter has been developed for the Gerda experiment which searches for neutrinoless double beta decay in Ge. The Gerda Phase I energy calibration data have been reprocessed and an average improvement of 0.3 keV in energy resolution (FWHM) corresponding to 10 % at the value for decay in Ge is obtained. This is possible thanks to the enhanced low-frequency noise rejection of this Zero Area Cusp (ZAC) signal shaping filter.

  2. Improvement of the GERDA Ge Detectors Energy Resolution by an Optimized Digital Signal Processing

    Science.gov (United States)

    Benato, G.; D'Andrea, V.; Cattadori, C.; Riboldi, S.

    GERDA is a new generation experiment searching for neutrinoless double beta decay of 76Ge, operating at INFN Gran Sasso Laboratories (LNGS) since 2010. Coaxial and Broad Energy Germanium (BEGe) Detectors have been operated in liquid argon (LAr) in GERDA Phase I. In the framework of the second GERDA experimental phase, both the contacting technique, the connection to and the location of the front end readout devices are novel compared to those previously adopted, and several tests have been performed. In this work, starting from considerations on the energy scale stability of the GERDA Phase I calibrations and physics data sets, an optimized pulse filtering method has been developed and applied to the Phase II pilot tests data sets, and to few GERDA Phase I data sets. In this contribution the detector performances in term of energy resolution and time stability are here presented. The improvement of the energy resolution, compared to standard Gaussian shaping adopted for Phase I data analysis, is discussed and related to the optimized noise filtering capability. The result is an energy resolution better than 0.1% at 2.6 MeV for the BEGe detectors operated in the Phase II pilot tests and an improvement of the energy resolution in LAr of about 8% achieved on the GERDA Phase I calibration runs, compared to previous analysis algorithms.

  3. The trials of Hanna Porn: the campaign to abolish midwifery in Massachusetts.

    Science.gov (United States)

    Declercq, E R

    1994-06-01

    The case of Hanna Porn affords an opportunity to examine how the laws that led to the abolition of midwifery in Massachusetts evolved and were applied to the midwife whose case set the state legal precedent. Mrs Porn served primarily a Finnish-Swedish clientele of wives of laborers. The outcomes of the births she attended appear to have been positive, and she maintained a neonatal mortality rate of less than half that of local physicians. She also repeatedly defied court orders to stop practicing. Her case exemplifies the efforts that occurred nationally to abolish midwifery in the United States.

  4. Hanna Krall e os caminhos tortos da memória e da identidade

    OpenAIRE

    Piotr Kilanowski

    2013-01-01

    Neste artigo apresentamos a escritora polonesa de origem judaica Hanna Krall por meio da análise literária do seu romance Sublokatorka (A sublocatária).  O romance, com elementos autobiográficos, apresenta a personalidade cindida de uma menina sobrevivente do Holocausto e discute o tema da identidade polonesa, judaica e judaico-polonesa. Através da observação da memória e do processo de criação da memória, a autora mostra a construção da identidade falsa e a repressão da verdadeira, o comport...

  5. Hanna Arendt and the distinction between knowing and thinking: reflections for science teaching

    Directory of Open Access Journals (Sweden)

    José Francisco Flores

    2017-03-01

    Full Text Available Theoretical contributions are proposed for the formation of science teachers from the distinction between knowledge and thought presented by Hanna Arendt. For the author, the action of knowing, accomplished by science, seeks truths, while the thought, as a action of spirit, seeks meanings. The concept of creative potential is used, suggested by the plastic artist Fayga Ostrower, as a motivational factor of thinking for production of meanings. It can be concluded that science teaching must aim at the development of the ability of not only knowing, but also thinking, promoting the expansion of the creative potential of students and teachers.

  6. Overburden characterization and post-burn study of the Hanna IV, underground coal gasification site, Wyoming, and comparison to other Wyoming UCG sites

    Energy Technology Data Exchange (ETDEWEB)

    Marcouiller, B.A.; Burns, L.K.; Ethridge, F.G.

    1984-11-01

    Analysis of 21 post-burn cores taken from the Hanna IV UCG site allows 96 m (315 ft) of overburden to be subdivided into four local stratigraphic units. The 7.6 m (25 ft) thick Hanna No. 1 coal seam is overlain by a laterally discontinuous, 3.3 m (11 ft) thick shaley mudstone (Unit A') in part of the Hanna IV site. A more widespread, 30 m (90 ft) thick well-indurated sandstone (Unit A) overlies the A' unit. Unit A is the roof rock for both of the Hanna IV cavities. Overlying Unit A is a 33 m (108 ft) thick sequence of mudstone and claystone (Unit B), and the uppermost unit at the Hanna IV site (Unit C) is a coarse-grained sandstone that ranges in thickness from 40 to 67 m (131 to 220 ft). Two elliptical cavities were formed during the two phases of the Hanna IV experiment. The larger cavity, Hanna IVa, is 45 x 15 m in plan and has a maximum height of 18 m (59 ft) from the base of the coal seam to the top of the cavity; the Hanna IVb cavity is 40 x 15 m in plan and has a maximum height of 11 m (36 ft) from the base of the coal seam to the top of the cavity. Geotechnical tests indicated that the Hanna IV overburden rocks were moderately strong to strong, based on the empirical classification of Broch and Franklin (1972), and a positive, linear correlation exists between rock strength and volume percent calcite cement. There is an inverse linear correlation between rock strength and porosity for the Hanna IV overburden rocks. 28 refs., 34 figs., 13 tabs..

  7. Design, simulation and construction of the GERDA-muon veto; Design, Simulation und Aufbau des GERDA-Myonvetos

    Energy Technology Data Exchange (ETDEWEB)

    Knapp, Markus Alexander

    2009-10-09

    The GERmanium Detector Array (Gerda) is a experiment searching for the neutrinoless double beta decay of {sup 76}Ge. This very rare weakly interacting process is predicted to occur if the neutrino exhibits a mass and is a Majorana particle; i.e. it is its own antiparticle. Although the double beta decay with emission of two neutrinos has been found in several nuclei, there is at this moment only a part of the Heidelberg-Moscow Collaboration claiming to have observed the neutrinoless double beta decay. The best limit for the half life currently is T{sub 1/2} > 1.2.10{sup 25} y. Gerda will expose about 15 kg.y of enriched germanium detectors from the Heidelberg-Moscow and IGEX crystals in phase I. In this phase, it will be able to test the claim within one year, due to reduced background by a factor 10. In phase II about 100 kg.y of data will be accumulated, leading to T{sub 1/2} > 2.10{sup 26} y due to an additional reduction of the background by a factor of 10. For a high sensitivity at these half lives, it is necessary to detect the corresponding rare events. Therefore background reduction to a rate of 10{sup -3} (counts)/(keV.kg.year) is of utmost importance. Therefore different background identification methods, like pulseshape analysis or a muon veto will be used. In this work, the development of the Cherenkov muon veto detectors is presented. First design studies will be shown, including extensive Monte-Carlo simulations. These simulations were also used to optimize the trigger conditions of the data acquisition, to detect all muons, that cause an energy deposition in the germanium detectors. Finally the on site construction at the Laboratori Nazionali del Gran Sasso in Italy will be described. (orig.)

  8. HANNA ARENDT VERSUS MARX: UMA DEFESA DE MARX FRENTE À CRÍTICA ARENDTIANA

    Directory of Open Access Journals (Sweden)

    Júlia Sebba Ramalho

    2009-03-01

    Full Text Available O presente trabalho trata das críticas de Hanna Arendt a Karl Marx especificamentena obra de Arendt A condição humana. No capítulo III desta obra Arendt versa sobre a atividadedo trabalho que, segundo ela, emergiu na Era Moderna como o principal foco das preocupaçõeshumanas. Para a autora a expressão teórica mais elaborada da emergência do animal laborans éa obra de Marx. Desse modo, toda a discussão do capítulo III de A condição humana gira emtorno das críticas de Arendt a Marx. No presente artigo trataremos de elucidar os aspectoscentrais desta crítica e de mostrar os equívocos de Arendt em sua leitura da obra marxiana.

  9. Hanna David`s Book: The Gifted Arab Child In Israel

    Directory of Open Access Journals (Sweden)

    Emre KOMEK

    2014-06-01

    Full Text Available In this article, it was examined Hanna David’s Book: The Gifted Arab Child in Israel. The book focuses on Arab gifted children living in Israel. In Israel three Arab groups are living: Muslim, Christian and Druze. This book contains 7 sections. First Section: A Brief History of Education of Arabs In The State of Israel, Second Section: Characteristics of the Arab Gifted Child in Israel, Third Section: Education of the Arab Gifted Child, Fourth Section: Enrichment Programs for the Gifted in the Arab Sector, Fifth section: Description of Various Kinds of Enrichment Program for the Arab Sector, Sixth section: A Minority within a Minority: Gifted Students in the Christian, Druze and Bedouin Sectors, Seventh Section: The talented Arab Girl: Between Tradition and Modernism. In this book, author gives some suggestions to reveal potential of Arab girls. Some of them are; family support, financial aid etc.

  10. Results on neutrinoless double beta decay of 76Ge from the GERDA experiment

    Science.gov (United States)

    Palioselitis, Dimitrios

    2015-05-01

    The Germanium Detector Array (GERDA) experiment is searching for neutrinoless double beta (0νββ) decay of 76Ge, a lepton number violating nuclear process predicted by extensions of the Standard Model. GERDA is an array of bare germanium diodes immersed in liquid argon located at the Gran Sasso National Laboratory (LNGS) in Italy. The results of the GERDA Phase I data taking with a total exposure of 21.6 kg yr and a background index of 0.01 cts/(keV kg yr) are presented in this paper. No signal was observed and a lower limit of T1/20ν > 2.1×1025 yr (90% C.L.) was derived for the half-life of the 0νββ decay of 76Ge. Phase II of the experiment aims to reduce the background around the region of interest by a factor of ten.

  11. Improvement of the energy resolution via an optimized digital signal processing in GERDA Phase I

    International Nuclear Information System (INIS)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.

    2015-01-01

    An optimized digital shaping filter has been developed for the Gerda experiment which searches for neutrinoless double beta decay in 76 Ge. The Gerda Phase I energy calibration data have been reprocessed and an average improvement of 0.3 keV in energy resolution (FWHM) corresponding to 10 % at the Q value for 0νββ decay in 76 Ge is obtained. This is possible thanks to the enhanced low-frequency noise rejection of this Zero Area Cusp (ZAC) signal shaping filter

  12. Improvement of the energy resolution via an optimized digital signal processing in GERDA Phase I

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M. [Physik Department and Excellence Cluster Universe, Technische Universität München, Munich (Germany); Allardt, M. [Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden (Germany); Bakalyarov, A. M. [National Research Center “Kurchatov Institute”, Moscow (Russian Federation); Balata, M. [INFN Laboratori Nazionali del Gran Sasso, LNGS, and Gran Sasso Science Institute, GSSI, Assergi (Italy); Collaboration: GERDA Collaboration; and others

    2015-06-09

    An optimized digital shaping filter has been developed for the Gerda experiment which searches for neutrinoless double beta decay in {sup 76}Ge. The Gerda Phase I energy calibration data have been reprocessed and an average improvement of 0.3 keV in energy resolution (FWHM) corresponding to 10 % at the Q value for 0νββ decay in {sup 76}Ge is obtained. This is possible thanks to the enhanced low-frequency noise rejection of this Zero Area Cusp (ZAC) signal shaping filter.

  13. Results on neutrinoless double beta decay of 76Ge from GERDA Phase I

    International Nuclear Information System (INIS)

    Palioselitis, Dimitrios

    2015-01-01

    The Germanium Detector Array (GERDA) experiment is searching for the neutrinoless double beta (0νββ) decay of 76 Ge by operating bare germanium diodes in liquid argon. GERDA is located at the Gran Sasso National Laboratory (LNGS) in Italy. During Phase I, a total exposure of 21.6 kg yrand a background index of 0.01 cts/(keVkg yr) were reached. No signal was observed and a lower limit of T 0ν 1/2 > 2.1 · 10 25 yr(90% C.L.) is derived for the half life of the 0νββ decay of 76 Ge. (paper)

  14. Results on neutrinoless double beta decay of 76Ge from GERDA Phase I

    Science.gov (United States)

    Palioselitis, Dimitrios; GERDA Collaboration

    2015-05-01

    The Germanium Detector Array (GERDA) experiment is searching for the neutrinoless double beta (0νββ) decay of 76Ge by operating bare germanium diodes in liquid argon. GERDA is located at the Gran Sasso National Laboratory (LNGS) in Italy. During Phase I, a total exposure of 21.6 kg yrand a background index of 0.01 cts/(keVkg yr) were reached. No signal was observed and a lower limit of T0ν1/2 > 2.1 · 1025 yr(90% C.L.) is derived for the half life of the 0νββ decay of 76Ge.

  15. Improvement of the energy resolution via an optimized digital signal processing in GERDA Phase I

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M.; Bode, T.; Budjas, D.; Janicsko Csathy, J.; Lazzaro, A.; Schoenert, S. [Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Allardt, M.; Domula, A.; Lehnert, B.; Schneider, B.; Wester, T.; Wilsenach, H.; Zuber, K. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); Bakalyarov, A.M.; Belyaev, S.T.; Lebedev, V.I.; Zhukov, S.V. [National Research Center ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Balata, M.; D' Andrea, V.; Di Vacri, A.; Junker, M.; Laubenstein, M.; Macolino, C.; Zavarise, P. [LNGS, Assergi (Italy); Barabanov, I.; Bezrukov, L.; Doroshkevich, E.; Fedorova, O.; Gurentsov, V.; Kazalov, V.; Kuzminov, V.V.; Lubsandorzhiev, B.; Moseev, P.; Selivanenko, O.; Veresnikova, A.; Yanovich, E. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Barros, N. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); University of Pennsylvania, Department of Physics and Astronomy, Philadelphia, PA (United States); Baudis, L.; Benato, G.; Walter, M. [Physik Institut der Universitaet Zuerich, Zurich (Switzerland); Bauer, C.; Heisel, M.; Heusser, G.; Hofmann, W.; Kihm, T.; Kirsch, A.; Knoepfle, K.T.; Lindner, M.; Maneschg, W.; Salathe, M.; Schreiner, J.; Schwingenheuer, B.; Simgen, H.; Smolnikov, A.; Stepaniuk, M.; Wagner, V.; Wegmann, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Becerici-Schmidt, N.; Caldwell, A.; Liao, H.Y.; Majorovits, B.; Palioselitis, D.; Schulz, O.; Vanhoefer, L. [Max-Planck-Institut fuer Physik, Munich (Germany); Bellotti, E. [Universita Milano Bicocca, Dipartimento di Fisica, Milan (Italy); INFN Milano Bicocca, Milan (Italy); Belogurov, S.; Kornoukhov, V.N. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Bettini, A.; Brugnera, R.; Garfagnini, A.; Hemmer, S.; Medinaceli, E.; Sada, C.; Sturm, K. von [Universita di Padova, Dipartimento di Fisica e Astronomia, Padua (Italy); INFN Padova, Padua (Italy); Borowicz, D. [Jagiellonian University, Institute of Physics, Krakow (Poland); Joint Institute for Nuclear Research, Dubna (Russian Federation); Brudanin, V.; Egorov, V.; Kochetov, O.; Nemchenok, I.; Rumyantseva, N.; Zhitnikov, I.; Zinatulina, D. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Cattadori, C. [INFN Milano Bicocca, Milan (Italy); Chernogorov, A.; Demidova, E.V.; Kirpichnikov, I.V.; Vasenko, A.A. [Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Falkenstein, R.; Freund, K.; Grabmayr, P.; Hegai, A.; Jochum, J.; Schmitt, C.; Schuetz, A.K. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Frodyma, N.; Misiaszek, M.; Panas, K.; Pelczar, K.; Wojcik, M.; Zuzel, G. [Jagiellonian University, Institute of Physics, Krakow (Poland); Gangapshev, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Gusev, K. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Center ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Hult, M.; Lutter, G. [Institute for Reference Materials and Measurements, Geel (Belgium); Inzhechik, L.V. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Moscow Institute of Physics and Technology, Moscow (Russian Federation); Klimenko, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); International University for Nature, Society and Man ' ' Dubna' ' , Dubna (Russian Federation); Lippi, I.; Stanco, L.; Ur, C.A. [INFN Padova, Padua (Italy); Lubashevskiy, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Pandola, L. [INFN Laboratori Nazionali del Sud, Catania (Italy); Pullia, A.; Riboldi, S. [Universita degli Studi di Milano, Dipartimento di Fisica, Milan (Italy); INFN, Milano (Italy); Shirchenko, M. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Center ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Collaboration: GERDA Collaboration

    2015-06-15

    An optimized digital shaping filter has been developed for the Gerda experiment which searches for neutrinoless double beta decay in {sup 76}Ge. The GERDA Phase I energy calibration data have been reprocessed and an average improvement of 0.3 keV in energy resolution (FWHM) corresponding to 10% at the Q value for 0νββ decay in {sup 76}Ge is obtained. This is possible thanks to the enhanced low-frequency noise rejection of this Zero Area Cusp (ZAC) signal shaping filter. (orig.)

  16. Ecosystem monitoring information collected in Hanna Shoal in the Chukchi Sea for the COMIDA CAB project from August 2012 to August 2013 (NODC Accession 0123220)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This accession contains physical, chemical, and biological data collected during research cruises for the Hanna Shoal Ecosystem Study. The study occurred at 138...

  17. Süütust näpates : Tanel Veenre fotoseeria teatrikostüümidest Draamateatri laval / Tanel Veenre, Hanna Tiidus, Margit Soosaar...[jt.

    Index Scriptorium Estoniae

    2007-01-01

    Stilist: Hanna Tiidus. Naine: Merle Palmiste. Poiss: Joonas (MJ-Models). Kostüümid etendustest "Rohuvoodi" (Aime Unt), "Rehepapp", "Tõeline inspektor koer" (Ene-Liis Semper), "Liilia" (Lilja Blumenfeld), "Mort" (Kersti Varrak), "Potilaadale" (Reet Aus), "Amadeus" (Krista Tool)

  18. The Gerda search for neutrinoless double beta decay

    Science.gov (United States)

    O'Shaughnessy, Christopher; Gerda Collaboration

    2013-10-01

    The Germanium Detector Array (Gerda) is a search for the neutrinoless double beta decay of 76Ge. High Purity Germanium (HPGe) detectors enriched in the isotope-76 are operated bare in liquid argon (LAr). LAr is used for both cooling of the HPGe diodes to their operating temperatures and for shielding from external radiation sources. From the measurements of the first phase that began data taking on 1 Nov. 2011 it is expected to have a sensitivity on the level of T1/2>2E25 yr at a 90% CL after 15 kġyr. The goal of this phase will be to probe the claim of an observation by part of the Heidelberg-Moscow collaboration. Efforts will then focus on increasing the sensitivity of the experiment by deploying additional enriched detectors that are in an advanced stage of production and by reducing the background index further by making use of pulse shape discrimination techniques as well as an active LAr veto. While the 0νββ region of interest continues to remain blinded, here the status of Phase-I data taking is presented along with the work towards improving the experimental sensitivity.

  19. Search of Neutrinoless Double Beta Decay with the GERDA Experiment

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Fedorova, O.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Gotti, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hampel, W.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hoffmann, W.; Hult, M.; Inzhechik, L. V.; Ioannucci, L.; Janicksó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Marissens, G.; Medinaceli, E.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Nisi, S.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pessina, G.; Pullia, A.; Reissfelder, M.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schneider, B.; Schreiner, J.; Schulz, O.; Schwingenheuer, B.; Schönert, S.; Seitz, H.; Selivalenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Stepaniuk, M.; Strecker, H.; Ur, C. A.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wilsenach, H.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2016-04-01

    The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0 νββ) in 76Ge, located at Laboratori Nazionali del Gran Sasso of INFN (Italy). In the first phase of the experiment, a 90% confidence level (C.L.) sensitivity of 2.4 ṡ1025 yr on the 0 νββ decay half-life was achieved with a 21.6 kgṡyr exposure and an unprecedented background index in the region of interest of 10-2 counts/(keVṡkgṡyr). No excess of signal events was found, and an experimental lower limit on the half-life of 2.1 ṡ 1025 yr (90% C.L.) was established. Correspondingly, the limit on the effective Majorana neutrino mass is mee < 0.2- 0.4 eV, depending on the considered nuclear matrix element. The previous claim for evidence of a 0 νββ decay signal is strongly disfavored, and the field of research is open again.

  20. Search for neutrinoless double beta decay with GERDA phase II

    Science.gov (United States)

    Agostini, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Csáthy, J. Janicskó; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knies, J.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Majorovits, B.; Maneschg, W.; Marissens, G.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Ransom, C.; Reissfelder, M.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schulz, O.; Schütz, A.-K.; Schwingenheuer, B.; Seitz, H.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2017-10-01

    The GERmanium Detector Array (gerda) experiment, located at the Gran Sasso underground laboratory in Italy, is one of the leading experiments for the search of 0νββ decay. In Phase II of the experiment 35.6 kg of enriched germanium detectors are operated. The application of active background rejection methods, such as a liquid argon scintillation light read-out and pulse shape discrimination of germanium detector signals, allowed to reduce the background index to the intended level of 10-3 cts/(keV.kg.yr). In the first five month of data taking 10.8 kg yr of exposure were accumulated. No signal has been found and together with data from Phase I a new limit for the neutrinoless double beta decay half-life of 76Ge of 5.3 . 1025 yr at 90% C.L. was established in June 2016. Phase II data taking is ongoing and will allow the exploration of half-lifes in the 1026 yr regime. The current status of data taking and an update on the background index are presented.

  1. LArGe: active background suppression using argon scintillation for the GERDA 0νββ-experiment

    International Nuclear Information System (INIS)

    Agostini, M.; Budjas, D.; Schoenert, S.; Barnabe-Heider, M.; Cattadori, C.; Gangapshev, A.; Gusev, K.; Heisel, M.; Smolnikov, A.; Junker, M.; Klimenko, A.; Lubashevskiy, A.; Pelczar, K.; Zuzel, G.

    2015-01-01

    LArGe is a GERDA low-background test facility to study novel background suppression methods in a low-background environment, for future application in the GERDA experiment. Similar to GERDA, LArGe operates bare germanium detectors submersed into liquid argon (1 m 3 , 1.4tons), which in addition is instrumented with photomultipliers to detect argon scintillation light. The scintillation signals are used in anti-coincidence with the germanium detectors to effectively suppress background events that deposit energy in the liquid argon. The background suppression efficiency was studied in combination with a pulse shape discrimination (PSD) technique using a BEGe detector for various sources, which represent characteristic backgrounds to GERDA. Suppression factors of a few times 10 3 have been achieved. First background data of LArGe with a coaxial HPGe detector (without PSD) yield a background index of (0.12 - 4.6) x 10 -2 cts/(keV kg year) (90 % C.L.), which is at the level of GERDA Phase I. Furthermore, for the first time we monitor the natural 42 Ar abundance (parallel to GERDA), and have indication for the 2νββ-decay in natural germanium. These results show the effectivity of an active liquid argon veto in an ultra-low background environment. As a consequence, the implementation of a liquid argon veto in GERDA Phase II is pursued. (orig.)

  2. LArGe: active background suppression using argon scintillation for the Gerda 0ν β β -experiment

    Science.gov (United States)

    Agostini, M.; Barnabé-Heider, M.; Budjáš, D.; Cattadori, C.; Gangapshev, A.; Gusev, K.; Heisel, M.; Junker, M.; Klimenko, A.; Lubashevskiy, A.; Pelczar, K.; Schönert, S.; Smolnikov, A.; Zuzel, G.

    2015-10-01

    LArGe is a Gerda low-background test facility to study novel background suppression methods in a low-background environment, for future application in the Gerda experiment. Similar to Gerda, LArGe operates bare germanium detectors submersed into liquid argon (1 m^3, 1.4 tons), which in addition is instrumented with photomultipliers to detect argon scintillation light. The scintillation signals are used in anti-coincidence with the germanium detectors to effectively suppress background events that deposit energy in the liquid argon. The background suppression efficiency was studied in combination with a pulse shape discrimination (PSD) technique using a BEGe detector for various sources, which represent characteristic backgrounds to Gerda. Suppression factors of a few times 10^3 have been achieved. First background data of LArGe with a coaxial HPGe detector (without PSD) yield a background index of (0.12-4.6)× 10^{-2} cts/(keV kg year) (90 % C.L.), which is at the level of Gerda Phase I. Furthermore, for the first time we monitor the natural ^{42}Ar abundance (parallel to Gerda), and have indication for the 2ν β β -decay in natural germanium. These results show the effectivity of an active liquid argon veto in an ultra-low background environment. As a consequence, the implementation of a liquid argon veto in Gerda Phase II is pursued.

  3. LArGe: active background suppression using argon scintillation for the GERDA 0νββ-experiment

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M.; Budjas, D.; Schoenert, S. [Technische Universitaet Muenchen, Munich (Germany); Barnabe-Heider, M. [Technische Universitaet Muenchen, Munich (Germany); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Cattadori, C. [Universita degli Studi di Milano, Milan (Italy); INFN, Milan (Italy); Gangapshev, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Institut for Nuclear Research, Moscow (Russian Federation); Gusev, K. [Technische Universitaet Muenchen, Munich (Germany); Joint Institut for Nuclear Research, Dubna (Russian Federation); National Research Center Kurchatov Institut, Moscow (Russian Federation); Heisel, M.; Smolnikov, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Junker, M. [Laboratori Nazionali del Gran Sasso, Assergi (Italy); Klimenko, A.; Lubashevskiy, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Joint Institut for Nuclear Research, Dubna (Russian Federation); Pelczar, K. [Jagellonian University, Cracow (Poland); Zuzel, G. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Jagellonian University, Cracow (Poland)

    2015-10-15

    LArGe is a GERDA low-background test facility to study novel background suppression methods in a low-background environment, for future application in the GERDA experiment. Similar to GERDA, LArGe operates bare germanium detectors submersed into liquid argon (1 m{sup 3}, 1.4tons), which in addition is instrumented with photomultipliers to detect argon scintillation light. The scintillation signals are used in anti-coincidence with the germanium detectors to effectively suppress background events that deposit energy in the liquid argon. The background suppression efficiency was studied in combination with a pulse shape discrimination (PSD) technique using a BEGe detector for various sources, which represent characteristic backgrounds to GERDA. Suppression factors of a few times 10{sup 3} have been achieved. First background data of LArGe with a coaxial HPGe detector (without PSD) yield a background index of (0.12 - 4.6) x 10{sup -2} cts/(keV kg year) (90 % C.L.), which is at the level of GERDA Phase I. Furthermore, for the first time we monitor the natural {sup 42}Ar abundance (parallel to GERDA), and have indication for the 2νββ-decay in natural germanium. These results show the effectivity of an active liquid argon veto in an ultra-low background environment. As a consequence, the implementation of a liquid argon veto in GERDA Phase II is pursued. (orig.)

  4. Sampling and analyses report for June 1992 semiannual postburn sampling at the RM1 UCG site, Hanna, Wyoming

    International Nuclear Information System (INIS)

    Lindblom, S.R.

    1992-08-01

    The Rocky Mountain 1 (RMl) underground coal gasification (UCG) test was conducted from November 16, 1987 through February 26, 1988 (United Engineers and Constructors 1989) at a site approximately one mile south of Hanna, Wyoming. The test consisted of dual module operation to evaluate the controlled retracting injection point (CRIP) technology, the elongated linked well (ELW) technology, and the interaction of closely spaced modules operating simultaneously. The test caused two cavities to be formed in the Hanna No. 1 coal seam and associated overburden. The Hanna No. 1 coal seam is approximately 30 ft thick and lays at depths between 350 ft and 365 ft below the surface in the test area. The coal seam is overlain by sandstones, siltstones and claystones deposited by various fluvial environments. The groundwater monitoring was designed to satisfy the requirements of the Wyoming Department of Environmental Quality (WDEQ) in addition to providing research data toward the development of UCG technology that minimizes environmental impacts. The June 1992 semiannual groundwater.sampling took place from June 10 through June 13, 1992. This event occurred nearly 34 months after the second groundwater restoration at the RM1 site and was the fifteenth sampling event since UCG operations ceased. Samples were collected for analyses of a limited suite set of parameters as listed in Table 1. With a few exceptions, the groundwater is near baseline conditions. Data from the field measurements and analysis of samples are presented. Benzene concentrations in the groundwater were below analytical detection limits

  5. Results on Neutrinoless Double-Beta Decay from Gerda Phase I

    Science.gov (United States)

    Macolino, Carla

    2014-12-01

    The GERmanium Detector Array, GERDA, is designed to search for neutrinoless double-beta (0νββ) decay of 76Ge and it is installed in the Laboratori Nazionali del Gran Sasso (LNGS) of INFN, Italy. In this review, the detection principle and detector setup of GERDA are described. Also, the main physics results by GERDA Phase I, are discussed. They include the measurement of the half-life of 2νββ decay, the background decomposition of the energy spectrum and the techniques for the discrimination of the background, based on the pulse shape of the signal. In the last part of this review, the estimation of a limit on the half-life of 0νββ (T0ν 1/2>2.1ḑot 1025 yr at 90% C.L.) and the comparison with previous results are discussed. GERDA data from Phase I strongly disfavor the recent claim of 0νββ discovery, based on data from the Heidelberg-Moscow experiment.

  6. Search for 0νββ-decay with gerda phase II

    Science.gov (United States)

    Majorovits, B.

    2018-01-01

    The Gerda experiment is designed to search for neutrinoless double beta decay of 76Ge. From data taken during Phase I of the experiment some knowledge on background contributions important for future experiments could be obtained: limits on the bulk contamination of HPGe with primordial uranium and thorium are presented and first evidence for observation of the decay of the meta-stable state of 77mGe due to neutron capture on 76Ge is discussed. In Phase II of the Gerda experiment 37 HPGe detectors enriched in the isotope 76Ge are deployed into the Gerda cryostat. From non-observation of a peak at 2039 keV a half-life limit on neutrinoless double beta decay of 76Ge of T1/2 > 5.3 . 1025 yr has been obtained. The background rate in the energy region of interest, after pulse shape discrimination and liquid argon veto cuts is in the range of a few Cts//ROI ton yr). This makes Gerda the first 0νββ-experiment that has a background so low that <1 counts are expected in the RoI within the anticipated life time of the experiment.

  7. All but Her Life: Holocaust Survivor Gerda Klein Shares with Learners

    Science.gov (United States)

    Lincoln, Margaret

    2007-01-01

    During the 2006-2007 school year, students from Battle Creek, Michigan, high school joined numerous others from across the state in reading holocaust survivor Gerda Klein's memoir, "All But My Life." Published in 57 editions and still in print after 50 years, the book is the inspiring account of a remarkable individual who endured unspeakable…

  8. In-situ measurement of the light attenuation in liquid argon in the GERDA cryostat

    Energy Technology Data Exchange (ETDEWEB)

    Schneider, Birgit [IKTP, TU Dresden (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    GERDA is an experiment searching for neutrinoless double beta decay in {sup 76}Ge. It uses germanium detectors which are enriched in {sup 76}Ge and operates them naked in liquid argon (LAr), which serves both as a coolant and a shield for external radiation. For phase II of GERDA it is planned to reach an exposure of 100 kg . yr with a BI of 10{sup -3} cts/(kg . yr . keV). One of the major improvements to further reduce the BI is to instrument the LAr to act as an additional background veto. The attenuation of the scintillation light in LAr creates a constraint on the effective active volume of the LAr veto and is therefore a key parameter to characterize the instrumentation. In order to measure the light attenuation in LAr, a setup was designed that could be deployed directly into the GERDA cryostat. This setup contains a movable beta source and a PMT to detect the scintillation light at different distances. The talk will describe in detail the construction of the setup, its successful deployment in the GERDA cryostat and the consecutive analysis of the acquired data.

  9. Suppression of the background coming from {sup 42}Ar in the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Lubashevskiy, Alexey [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2016-07-01

    The GERDA experiment aims at the 0νββ search in {sup 76}Ge. The search is performed with high purity germanium detectors operated in liquid argon. One of the most dangerous backgrounds in GERDA is the background from {sup 42}K which is a daughter isotope of cosmogenically produced {sup 42}Ar, presented in natural argon. {sup 42}K ions collect on the surface of the detector and increase its background level. Several ways to suppress such background has been investigated. The tests were performed at LArGe low-background test facility, which gives a possibility to operate bare detectors in about 1m{sup 3} of LAr. It is equipped with a scintillation veto, so particles which deposit part of their energy in LAr can be detected by PMTs. The experimental setup is located at LNGS underground laboratory close to GERDA experiment location. Different experimental techniques were tested together with pulse shape discrimination (PSD) method in order to suppress {sup 42}K background. The chosen solution for GERDA Phase II is so called ''nylon mini-shroud'' (NMS). It is made from nylon foil and covered with wavelength shifter from both sides. NMS allows to suppress collection of {sup 42}K ions towards to the surface significantly. It was demonstrated in LArGe that together with PSD and scintillation veto the {sup 42}K background can be suppressed in more than 1000 times. The results obtained during commissioning runs in GERDA Phase II are also presented.

  10. Pulse shape discrimination for Gerda Phase I data

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Andreotti, E.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barnabé Heider, M.; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Cossavella, F.; Demidova, E. V.; Domula, A.; Egorov, V.; Falkenstein, R.; Ferella, A.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gotti, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Guthikonda, K. K.; Hampel, W.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Ioannucci, L.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Liu, X.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Machado, A. A.; Majorovits, B.; Maneschg, W.; Misiaszek, M.; Nemchenok, I.; Nisi, S.; O'Shaughnessy, C.; Pandola, L.; Pelczar, K.; Pessina, G.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schreiner, J.; Schulz, O.; Schwingenheuer, B.; Schönert, S.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Strecker, H.; Tarka, M.; Ur, C. A.; Vasenko, A. A.; Volynets, O.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2013-10-01

    The Gerda experiment located at the Laboratori Nazionali del Gran Sasso of INFN searches for neutrinoless double beta (0 νββ) decay of 76Ge using germanium diodes as source and detector. In Phase I of the experiment eight semi-coaxial and five BEGe type detectors have been deployed. The latter type is used in this field of research for the first time. All detectors are made from material with enriched 76Ge fraction. The experimental sensitivity can be improved by analyzing the pulse shape of the detector signals with the aim to reject background events. This paper documents the algorithms developed before the data of Phase I were unblinded. The double escape peak (DEP) and Compton edge events of 2.615 MeV γ rays from 208Tl decays as well as two-neutrino double beta (2 νββ) decays of 76Ge are used as proxies for 0 νββ decay. For BEGe detectors the chosen selection is based on a single pulse shape parameter. It accepts 0.92±0.02 of signal-like events while about 80 % of the background events at Q ββ =2039 keV are rejected. For semi-coaxial detectors three analyses are developed. The one based on an artificial neural network is used for the search of 0 νββ decay. It retains 90 % of DEP events and rejects about half of the events around Q ββ . The 2 νββ events have an efficiency of 0.85±0.02 and the one for 0 νββ decays is estimated to be . A second analysis uses a likelihood approach trained on Compton edge events. The third approach uses two pulse shape parameters. The latter two methods confirm the classification of the neural network since about 90 % of the data events rejected by the neural network are also removed by both of them. In general, the selection efficiency extracted from DEP events agrees well with those determined from Compton edge events or from 2 νββ decays.

  11. Pulse shape discrimination for Gerda Phase I data

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M.; Bode, T.; Budjas, D.; Janicsko Csathy, J.; Lazzaro, A.; Schoenert, S. [Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Muenchen (Germany); Allardt, M.; Barros, N.; Domula, A.; Lehnert, B.; Wester, T.; Zuber, K. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); Andreotti, E. [Institute for Reference Materials and Measurements, Geel (Belgium); Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Bakalyarov, A.M.; Belyaev, S.T.; Lebedev, V.I.; Zhukov, S.V. [National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Balata, M.; Ioannucci, L.; Junker, M.; Laubenstein, M.; Macolino, C.; Nisi, S.; Pandola, L.; Zavarise, P. [LNGS, INFN Laboratori Nazionali del Gran Sasso, Assergi (Italy); Barabanov, I.; Bezrukov, L.; Gurentsov, V.; Inzhechik, L.V.; Kuzminov, V.V.; Lubsandorzhiev, B.; Yanovich, E. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Barnabe Heider, M. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Muenchen (Germany); Baudis, L.; Benato, G.; Ferella, A.; Guthikonda, K.K.; Tarka, M.; Walter, M. [Physik Institut der Universitaet Zuerich, Zuerich (Switzerland); Bauer, C.; Hampel, W.; Heisel, M.; Heusser, G.; Hofmann, W.; Kihm, T.; Kirsch, A.; Knoepfle, K.T.; Lindner, M.; Lubashevskiy, A.; Machado, A.A.; Maneschg, W.; Salathe, M.; Schreiner, J.; Schwingenheuer, B.; Simgen, H.; Smolnikov, A.; Strecker, H.; Wagner, V.; Wegmann, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Becerici-Schmidt, N.; Caldwell, A.; Cossavella, F.; Liao, H.Y.; Liu, X.; Majorovits, B.; O' Shaughnessy, C.; Schulz, O.; Volynets, O. [Max-Planck-Institut fuer Physik, Muenchen (Germany); Bellotti, E.; Pessina, G. [Universita Milano Bicocca, Dipartimento di Fisica, Milano (Italy); INFN Milano Bicocca, Milano (Italy); Belogurov, S.; Kornoukhov, V.N. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Bettini, A.; Brugnera, R.; Garfagnini, A.; Hemmer, S.; Sada, C. [Universita di Padova, Dipartimento di Fisica e Astronomia, Padova (Italy); INFN Padova, Padova (Italy); Brudanin, V.; Egorov, V.; Kochetov, O.; Nemchenok, I.; Rumyantseva, N.; Shevchik, E.; Zhitnikov, I.; Zinatulina, D. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Cattadori, C.; Gotti, C. [INFN Milano Bicocca, Milano (Italy); Chernogorov, A.; Demidova, E.V.; Kirpichnikov, I.V.; Vasenko, A.A. [Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Falkenstein, R.; Freund, K.; Grabmayr, P.; Hegai, A.; Jochum, J.; Schmitt, C. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Frodyma, N.; Misiaszek, M.; Pelczar, K.; Wojcik, M.; Zuzel, G. [Jagiellonian University, Institute of Physics, Cracow (Poland); Gangapshev, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Gusev, K. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Muenchen (Germany); Hult, M.; Lutter, G. [Institute for Reference Materials and Measurements, Geel (Belgium); Klimenko, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Lippi, I.; Stanco, L.; Ur, C.A. [INFN Padova, Padova (Italy); Pullia, A.; Riboldi, S. [Universita degli Studi di Milano (IT); INFN Milano, Dipartimento di Fisica, Milano (IT); Shirchenko, M. [Joint Institute for Nuclear Research, Dubna (RU); National Research Centre ' ' Kurchatov Institute' ' , Moscow (RU); Sturm, K. von [Universita di Padova, Dipartimento di Fisica e Astronomia, Padova (IT); INFN Padova, Padova (IT); Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (DE)

    2013-10-15

    The Gerda experiment located at the Laboratori Nazionali del Gran Sasso of INFN searches for neutrinoless double beta (0{nu}{beta}{beta}) decay of {sup 76}Ge using germanium diodes as source and detector. In Phase I of the experiment eight semi-coaxial and five BEGe type detectors have been deployed. The latter type is used in this field of research for the first time. All detectors are made from material with enriched {sup 76}Ge fraction. The experimental sensitivity can be improved by analyzing the pulse shape of the detector signals with the aim to reject background events. This paper documents the algorithms developed before the data of Phase I were unblinded. The double escape peak (DEP) and Compton edge events of 2.615 MeV {gamma} rays from {sup 208}Tl decays as well as two-neutrino double beta (2{nu}{beta}{beta}) decays of {sup 76}Ge are used as proxies for 0{nu}{beta}{beta} decay. For BEGe detectors the chosen selection is based on a single pulse shape parameter. It accepts 0.92{+-}0.02 of signal-like events while about 80 % of the background events at Q{sub {beta}{beta}} =2039 keV are rejected. For semi-coaxial detectors three analyses are developed. The one based on an artificial neural network is used for the search of 0 {nu}{beta}{beta} decay. It retains 90 % of DEP events and rejects about half of the events around Q{sub {beta}{beta}}. The 2 {nu}{beta}{beta} events have an efficiency of 0.85 {+-}0.02 and the one for 0 {nu}{beta}{beta} decays is estimated to be 0.90{sup +0.05}{sub -0.09}. A second analysis uses a likelihood approach trained on Compton edge events. The third approach uses two pulse shape parameters. The latter two methods confirm the classification of the neural network since about 90 % of the data events rejected by the neural network are also removed by both of them. In general, the selection efficiency extracted from DEP events agrees well with those determined from Compton edge events or from 2{nu}{beta}{beta} decays. (orig.)

  12. Sampling and analyses report for December 1992 semiannual postburn sampling at the RMI UCG Site, Hanna, Wyoming

    International Nuclear Information System (INIS)

    Lindblom, S.R.

    1993-03-01

    During December 1992, groundwater was sampled at the site of the November 1987--February 1988 Rocky Mountain 1 underground coal gasification test near Hanna, Wyoming. The groundwater in near baseline condition. Data from the field measurements and analyzes of samples are presented. Benzene concentrations in the groundwater are below analytical detection limits (<0.01 mg/L) for all wells, except concentrations of 0.016 mg/L and 0.013 mg/L in coal seam wells EMW-3 and EMW-1, respectively

  13. Mitigation of ^{42}Ar/^{42}K background for the GERDA Phase II experiment

    Science.gov (United States)

    Lubashevskiy, A.; Agostini, M.; Budjáš, D.; Gangapshev, A.; Gusev, K.; Heisel, M.; Klimenko, A.; Lazzaro, A.; Lehnert, B.; Pelczar, K.; Schönert, S.; Smolnikov, A.; Walter, M.; Zuzel, G.

    2018-01-01

    Background coming from the ^{42}Ar decay chain is considered to be one of the most relevant for the Gerda experiment, which searches for the neutrinoless double beta decay of ^{76}Ge. The sensitivity strongly relies on the absence of background around the Q-value of the decay. Background coming from ^{42}K, a progeny of ^{42}Ar, can contribute to that background via electrons from the continuous spectrum with an endpoint at 3.5 MeV. Research and development on the suppression methods targeting this source of background were performed at the low-background test facility LArGe . It was demonstrated that by reducing ^{42}K ion collection on the surfaces of the broad energy germanium detectors in combination with pulse shape discrimination techniques and an argon scintillation veto, it is possible to suppress ^{42}K background by three orders of magnitude. This is sufficient for Phase II of the Gerda experiment.

  14. Gerda: A new 76Ge Double Beta Decay Experiment at Gran Sasso

    International Nuclear Information System (INIS)

    Simgen, Hardy

    2005-01-01

    In the new 76 Ge double beta decay experiment Gerda [I. Abt et al., arXiv hep-ex/0404039; Gerda proposal, to be submitted to the Gran Sasso scientific committee] bare diodes of enriched 76 Ge will be operated in highly pure liquid nitrogen or argon. The goal is to reduce the background around Q ββ =2039 keV below 10 -3 counts/(kg-bar keV-bar y). With presently available diodes from the Igex and HdMs experiments the current evidence for neutrinoless double beta decay [H.-V. Klapdor-Kleingrothaus, et al., Mod. Phys. Lett. A16 (2001) 2409ff] can unambigously be checked within one year of measurement

  15. First results of neutrinoless double beta decay search with the GERmanium Detector Array "GERDA"

    Science.gov (United States)

    Janicskó Csáthy, József

    2014-06-01

    The study of neutrinoless double beta decay is the most powerful approach to the fundamental question if the neutrino is a Majorana particle, i.e. its own anti-particle. The observation of the lepton number violating neutrinoless double beta decay would establish the Majorana nature of the neutrino. Until now neutrinoless double beta decay was not observed. The GERmanium Detector Array, GERDA is a double beta decay experiment located at the INFN Gran Sasso National Laboratory, Italy. GERDA operates bare Ge diodes enriched in 76Ge in liquid argon supplemented by a water shield. The exposure accumulated adds up to 21.6 kg· yr with a background level of 1.8 · 10-2 cts/(keV·kg·yr). The results of the Phase I of the experiment are presented and the preparation of the Phase II is briefly discussed.

  16. The search for 0νββ decay with the GERDA experiment: Status and prospects

    Science.gov (United States)

    Majorovits, B.

    2015-08-01

    The GERDA experiment is designed to search for neutrinoless double beta decay of 76Ge using HPGe detectors directly immersed into liquid argon. In its first phase the GERDA experiment has yielded a half life limit on this decay of T1/2 0 v>2.1 ṡ1025 . A background model has been developed. It explains the measured spectrum well, taking into account only components with distances to the detectors less then 2 cm. Competitive limits on Majoron accompanied double beta decay have been derived. Phase II of the experiment, now with additional liquid argon veto installed, is presently starting its commissioning phase. First commissioning spectra from calibration measurements are shown, proving that the liquid argon veto leads to a significant reduction of background events.

  17. Current experiments in germanium 0 ν β β search -- GERDA and MAJORANA

    Science.gov (United States)

    von Sturm, K.

    2015-01-01

    There are unanswered questions regarding neutrino physics that are of great interest for the scientific community. For example the absolute masses, the mass hierarchy and the nature of neutrinos are unknown up to now. The discovery of neutrinoless double beta decay (0νββ) would prove the existence of a Majorana mass, which would be linked to the half-life of the decay, and would in addition provide an elegant solution for the small mass of the neutrinos via the seesaw mechanism. Because of an existing discovery claim of 0νββ of 76Ge and the excellent energy resolution achievable, germanium is of special interest in the search for 0νββ . In this article the state of the art of germanium 0νββ search, namely the GERDA experiment and MAJORANA demonstrator, is presented. In particular, recent results of the GERDA collaboration, which strongly disfavour the above mentioned claim, are discussed.

  18. BEGe detectors in GERDA Phase I - performance, physics analysis and surface events

    Energy Technology Data Exchange (ETDEWEB)

    Lazzaro, Andrea [Physik-Department E15, Technische Universitaet Muenchen (Germany); Collaboration: GERDA-Collaboration

    2014-07-01

    The Phase I of the Gerda experiment, which has concluded its data taking in Summer 2013, was based on coaxial HPGe detectors already used for IGEX and HdM experiments. In the upcoming Phase II customized Broad Energy Germanium (BEGe) detectors will provide the major contribution to the total exposure. The first set of BEGe detectors has been deployed in Gerda since June 2012. The data collected in Phase I show the performance achieved in terms of spectroscopy and pulse shape discrimination. In particular the strongest background source, the {sup 42}K beta decay from the liquid argon surrounding the detectors, has been effectively rejected. The signals due to beta decay on the detector surface are indeed characterized by a longer charge collection time. This talk focuses on this key feature of the BEGe-PSD.

  19. Current experiments in germanium 0νββ search — GERDA and MAJORANA

    International Nuclear Information System (INIS)

    Von Sturm, K.

    2015-01-01

    There are unanswered questions regarding neutrino physics that are of great interest for the scientific community. For example the absolute masses, the mass hierarchy and the nature of neutrinos are unknown up to now. The discovery of neutrinoless double beta decay (0νββ) would prove the existence of a Majorana mass, which would be linked to the half-life of the decay, and would in addition provide an elegant solution for the small mass of the neutrinos via the seesaw mechanism. Because of an existing discovery claim of 0νββ of 76 Ge and the excellent energy resolution achievable, germanium is of special interest in the search for 0νββ. In this article the state of the art of germanium 0νββ search, namely the Gerda experiment and Majorana demonstrator, is presented. In particular, recent results of the Gerda collaboration, which strongly disfavour the above mentioned claim, are discussed.

  20. Signal and background studies for the search of neutrinoless double beta decay in GERDA

    International Nuclear Information System (INIS)

    Agostini, Matteo

    2013-01-01

    The GERDA experiment searches for the neutrinoless double beta decay in Ge-76, by operating bare HPGe detectors in ultra-pure liquid Ar. This dissertation presents a first decomposition of the background measured in the current data-taking phase. The background at the energy of interest was found to be dominated by 214 Bi, 208 Tl and 42 K gamma-rays, with secondary contributions from 42 K and 214 Bi beta-rays, and 210 Po alpha-rays. For the forthcoming upgrade of the apparatus, a new HPGe detector design (BEGe) has been studied, with focus on its capability of suppressing the identified backgrounds through pulse shape analysis. This included the development of a comprehensive modeling of the detectors and the experimental characterization of their response to surface interactions. The achieved results show that GERDA can improve the present limit on the neutrinoless double beta decay half-life by an order of magnitude.

  1. MaGe: a Monte Carlo framework for the Gerda and Majorana double beta decay experiments

    International Nuclear Information System (INIS)

    Bauer, M; Belogurov, S; Chan, Yd; Descovich, M; Detwiler, J; Di Marco, M; Fujikawa, B; Franco, D; Gehman, V; Henning, R; Hudek, K; Johnson, R; Jordan, D; Kazkaz, K; Klimenko, A; Knapp, M; Kroeninger, K; Lesko, K; Liu, X; Marino, M; Mokhtarani, A; Pandola, L; Perry, M; Poon, A; Radford, D; Tomei, C; Tull, C

    2006-01-01

    The Gerda and Majorana projects, both searching for the neutrinoless double beta-decay of 76 Ge, are developing a joint Monte-Carlo simulation framework called MaGe. Such an approach has many benefits: the workload for the development of general tools is shared between more experts, the code is tested in more detail, and more experimental data is made available for validation

  2. First results of GERDA Phase II and consistency with background models

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode1, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schulz, O.; Schütz, A.-K.; Schwingenheuer, B.; Selivanenko, O.; Shevzik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2017-01-01

    The GERDA (GERmanium Detector Array) is an experiment for the search of neutrinoless double beta decay (0νββ) in 76Ge, located at Laboratori Nazionali del Gran Sasso of INFN (Italy). GERDA operates bare high purity germanium detectors submersed in liquid Argon (LAr). Phase II of data-taking started in Dec 2015 and is currently ongoing. In Phase II 35 kg of germanium detectors enriched in 76Ge including thirty newly produced Broad Energy Germanium (BEGe) detectors is operating to reach an exposure of 100 kg·yr within about 3 years data taking. The design goal of Phase II is to reduce the background by one order of magnitude to get the sensitivity for T1/20ν = O≤ft( {{{10}26}} \\right){{ yr}}. To achieve the necessary background reduction, the setup was complemented with LAr veto. Analysis of the background spectrum of Phase II demonstrates consistency with the background models. Furthermore 226Ra and 232Th contamination levels consistent with screening results. In the first Phase II data release we found no hint for a 0νββ decay signal and place a limit of this process T1/20ν > 5.3 \\cdot {1025} yr (90% C.L., sensitivity 4.0·1025 yr). First results of GERDA Phase II will be presented.

  3. Production, characterization and operation of {sup 76}Ge enriched BEGe detectors in GERDA

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M.; Bode, T.; Budjas, D.; Janicsko Csathy, J.; Lazzaro, A.; Schoenert, S. [Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Allardt, M.; Barros, N.; Domula, A.; Lehnert, B.; Wester, T.; Wilsenach, H.; Zuber, K. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); Andreotti, E. [Institute for Reference Materials and Measurements, Geel (Belgium); Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Bakalyarov, A.M.; Belyaev, S.T.; Lebedev, V.I.; Zhukov, S.V. [National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Balata, M.; D' Andrea, V.; Ioannucci, L.; Junker, M.; Laubenstein, M.; Macolino, C.; Nisi, S.; Zavarise, P. [INFN Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, Assergi (Italy); Barabanov, I.; Bezrukov, L.; Gurentsov, V.; Inzhechik, L.V.; Kazalov, V.; Kuzminov, V.V.; Lubsandorzhiev, B.; Yanovich, E. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Baudis, L.; Benato, G.; Walter, M. [Physik Institut der Universitaet Zuerich, Zurich (Switzerland); Bauer, C.; Heisel, M.; Heusser, G.; Hofmann, W.; Kihm, T.; Kirsch, A.; Knoepfle, K.T.; Lindner, M.; Maneschg, W.; Salathe, M.; Schreiner, J.; Schwingenheuer, B.; Simgen, H.; Smolnikov, A.; Strecker, H.; Wagner, V.; Wegmann, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Becerici-Schmidt, N.; Caldwell, A.; Liao, H.Y.; Majorovits, B.; O' Shaughnessy, C.; Palioselitis, D.; Schulz, O.; Vanhoefer, L. [Max-Planck-Institut fuer Physik, Munich (Germany); Bellotti, E.; Pessina, G. [Universita Milano Bicocca, Dipartimento di Fisica, Milan (Italy); INFN Milano Bicocca, Milan (Italy); Belogurov, S.; Kornoukhov, V.N. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Bettini, A.; Brugnera, R.; Garfagnini, A.; Hemmer, S.; Sada, C.; Von Sturm, K. [Dipartimento di Fisica e Astronomia dell' Universita di Padova, Padua (Italy); INFN Padova, Padua (Italy); Borowicz, D. [Jagiellonian University, Institute of Physics, Cracow (Poland); Joint Institute for Nuclear Research, Dubna (Russian Federation); Brudanin, V.; Egorov, V.; Kochetov, O.; Nemchenok, I.; Rumyantseva, N.; Shevchik, E.; Zhitnikov, I.; Zinatulina, D. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Cattadori, C.; Gotti, C. [INFN Milano Bicocca, Milan (Italy); Chernogorov, A.; Demidova, E.V.; Kirpichnikov, I.V.; Vasenko, A.A. [Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Falkenstein, R.; Freund, K.; Grabmayr, P.; Hegai, A.; Jochum, J.; Schmitt, C.; Schuetz, A.K. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Frodyma, N.; Misiaszek, M.; Pelczar, K.; Wojcik, M.; Zuzel, G. [Jagiellonian University, Institute of Physics, Cracow (Poland); Gangapshev, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Gusev, K. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Hult, M.; Lutter, G. [Institute for Reference Materials and Measurements, Geel (Belgium); Klimenko, A.; Lubashevskiy, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Lippi, I.; Stanco, L.; Ur, C.A. [INFN Padova, Padua (Italy); Pandola, L. [INFN Laboratori Nazionali del Sud, Catania (Italy); Pullia, A.; Riboldi, S. [Universita degli Studi di Milano, Dipartimento di Fisica, Milan (Italy); INFN Milano (Italy); Shirchenko, M. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Collaboration: GERDA Collaboration

    2015-02-01

    The GERmanium Detector Array (GERDA) at the Gran Sasso Underground Laboratory (LNGS) searches for the neutrinoless double beta decay (0νββ) of {sup 76}Ge. Germanium detectors made of material with an enriched {sup 76}Ge fraction act simultaneously as sources and detectors for this decay. During Phase I of the experiment mainly refurbished semi-coaxial Ge detectors from former experiments were used. For the upcoming Phase II, 30 new {sup 76}Ge enriched detectors of broad energy germanium (BEGe)- type were produced. A subgroup of these detectors has already been deployed in GERDA during Phase I. The present paper reviews the complete production chain of these BEGe detectors including isotopic enrichment, purification, crystal growth and diode production. The efforts in optimizing the mass yield and in minimizing the exposure of the {sup 76}Ge enriched germanium to cosmic radiation during processing are described. Furthermore, characterization measurements in vacuum cryostats of the first subgroup of seven BEGe detectors and their long-term behavior in liquid argon are discussed. The detector performance fulfills the requirements needed for the physics goals of GERDA Phase II. (orig.)

  4. In-situ measurement of the light attenuation in liquid argon in the GERDA cryostat

    Energy Technology Data Exchange (ETDEWEB)

    Schneider, Birgit [TU Dresden, Institut fuer Kern- und Teilchenphysik (Germany); Collaboration: GERDA-Collaboration

    2016-07-01

    GERDA is an experiment searching for neutrinoless double beta decay in {sup 76}Ge. It operates the enriched germanium detectors bare in liquid argon (LAr), which serves both as a coolant and a shield for external radiation. Phase II of GERDA aims for an exposure of 100 kg . yr with a background index (BI) of 10{sup -3} cts/(kg . yr . keV). One of the major improvements to further reduce the BI comes from the instrumentation of the LAr to readout its scintillation light. The attenuation of the scintillation light in LAr limits the effective active volume of the LAr veto and is therefore a key parameter to characterize the instrumentation. In order to measure the light attenuation in LAr, a setup was designed that could be deployed directly into the GERDA cryostat. This setup contains a movable beta source and a PMT to detect the scintillation light at different distances. The talk will present the acquired data as well as a detailed description of the performed analysis technique and the current results.

  5. Production, characterization and operation of {sup 76}Ge enriched BEGe detectors in GERDA

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M. [Physik Department and Excellence Cluster Universe, Technische Universität München, Munich (Germany); Allardt, M. [Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden (Germany); Andreotti, E. [Institute for Reference Materials and Measurements, Geel (Belgium); Physikalisches Institut, Eberhard Karls Universität Tübingen, Tübingen (Germany); Bakalyarov, A. M. [National Research Centre “Kurchatov Institute”, Moscow (Russian Federation); Balata, M. [INFN Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, Assergi (Italy); and others

    2015-02-03

    The GERmanium Detector Array (Gerda) at the Gran Sasso Underground Laboratory (LNGS) searches for the neutrinoless double beta decay (0νββ) of {sup 76}Ge. Germanium detectors made of material with an enriched {sup 76}Ge fraction act simultaneously as sources and detectors for this decay. During Phase I of theexperiment mainly refurbished semi-coaxial Ge detectors from former experiments were used. For the upcoming Phase II, 30 new {sup 76}Ge enriched detectors of broad energy germanium (BEGe)-type were produced. A subgroup of these detectors has already been deployed in Gerda during Phase I. The present paper reviews the complete production chain of these BEGe detectors including isotopic enrichment, purification, crystal growth and diode production. The efforts in optimizing the mass yield and in minimizing the exposure of the {sup 76}Ge enriched germanium to cosmic radiation during processing are described. Furthermore, characterization measurements in vacuum cryostats of the first subgroup of seven BEGe detectors and their long-term behavior in liquid argon are discussed. The detector performance fulfills the requirements needed for the physics goals of Gerda Phase II.

  6. Search for neutrinoless double beta decay of Ge-76 with the GERmanium Detector Array '' GERDA ''

    International Nuclear Information System (INIS)

    Brugnera, R.

    2009-01-01

    The study of neutrinoless double beta decay (DBD) is the most powerful approach to the fundamental question if the neutrino is a Majorana particle, i.e. its own anti-particle. The observation of neutrinoless DBD would not only establish the Majorana nature of the neutrino but also represent a determination of its effective mass if the nuclear matrix element is given. So far, the most sensitive results have been obtained with Ge-76, and the group of Klapdor-Kleingrothaus has made a claim of discovery. Future experiments have to reduce radioactive backgrounds to increase the sensitivity. '' GERDA '' is a new double beta-decay experiment which is currently under construction in the INFN Gran Sasso National Laboratory, Italy. It is implementing a new shielding concept by operating bare Ge diodes - enriched in Ge-76 - in high purity liquid argon supplemented by a water shield. The aim of '' GERDA '' is to verify or refute the recent claim of discovery, and, in a second phase, to achieve a two orders of magnitude lower background index than recent experiments, increasing the sensitive mass and reaching exposure of 100 kg yr. It be will discuss design, physics reach, and status of construction of '' GERDA '', and present results from various R efforts including long term stability of bare Ge diodes in cryogenic liquids, material screening, cryostat performance, detector segmentation, cryogenic precision electronics, safety aspects, and Monte Carlo simulations. (author)

  7. Dead layer and active volume determination for GERDA Phase II detectors

    Energy Technology Data Exchange (ETDEWEB)

    Lehnert, Bjoern [TU Dresden (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    The GERDA experiment investigates the neutrinoless double beta decay of {sup 76}Ge and is currently running Phase I of its physics program. Using the same isotope as the Heidelberg Moscow (HDM) experiment, GERDA aims to directly test the claim of observation by a subset of the HDM collaboration. For the update to Phase II of the experiment in 2013, the collaboration organized the production of 30 new Broad Energy Germanium (BEGe) type detectors from original 35 kg enriched material and tested their performance in the low background laboratory HADES in SCK.CEN, Belgium. With additional 20 kg of detectors, GERDA aims to probe the degenerated hierarchy scenario. One of the crucial detector parameters is the active volume (AV) fraction which directly enters into all physics analysis. This talk presents the methodology of dead layer and AV determination with different calibration sources such as {sup 241}Am, {sup 133}Ba, {sup 60}Co and {sup 228}Th and the results obtained for the new Phase II detectors. Furthermore, the AV fraction turned out to be the largest systematic uncertainty in the analysis of Phase I data which makes it imperative to reduce its uncertainty for Phase II. This talk addresses the major contributions to the AV uncertainty and gives an outlook for improvements in Phase II analysis.

  8. Production, characterization and operation of Ge enriched BEGe detectors in GERDA

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Andreotti, E.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Domula, A.; Egorov, V.; Falkenstein, R.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gotti, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Ioannucci, L.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Misiaszek, M.; Nemchenok, I.; Nisi, S.; O'Shaughnessy, C.; Palioselitis, D.; Pandola, L.; Pelczar, K.; Pessina, G.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schreiner, J.; Schulz, O.; Schütz, A.-K.; Schwingenheuer, B.; Schönert, S.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Strecker, H.; Ur, C. A.; Vanhoefer, L.; Vasenko, A. A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wilsenach, H.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2015-02-01

    The GERmanium Detector Array ( Gerda) at the Gran Sasso Underground Laboratory (LNGS) searches for the neutrinoless double beta decay () of Ge. Germanium detectors made of material with an enriched Ge fraction act simultaneously as sources and detectors for this decay. During Phase I of theexperiment mainly refurbished semi-coaxial Ge detectors from former experiments were used. For the upcoming Phase II, 30 new Ge enriched detectors of broad energy germanium (BEGe)-type were produced. A subgroup of these detectors has already been deployed in Gerda during Phase I. The present paper reviews the complete production chain of these BEGe detectors including isotopic enrichment, purification, crystal growth and diode production. The efforts in optimizing the mass yield and in minimizing the exposure of the Ge enriched germanium to cosmic radiation during processing are described. Furthermore, characterization measurements in vacuum cryostats of the first subgroup of seven BEGe detectors and their long-term behavior in liquid argon are discussed. The detector performance fulfills the requirements needed for the physics goals of Gerda Phase II.

  9. Application of the A/E pulse shape discrimination method to first Ge-76 enriched BEGe detectors operated in GERDA

    Energy Technology Data Exchange (ETDEWEB)

    Lazzaro, Andrea; Agostini, Matteo; Budjas, Dusan; Schoenert, Stefan [Physik-Department E15, Technische Universitaet Muenchen (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    In 2013 the Gerda experiment will be upgraded to its second phase with more than double of the current {sup 76}Ge mass. The additional diodes are custom made Broad Energy Germanium (BEGe) detectors. This design has been chosen to enhance the pulse shape discrimination (PSD) capability, with respect to the Phase I coaxial detectors. The goal of Phase II is to improve by one order of magnitude the current background index; the PSD will bring a major contribution to this result. Since summer 2012 the first set of five enriched BEGe detectors are operated in Gerda Phase I. This offers us the possibility to test the PSD performances and the signal analysis in an environment as close as possible to the Gerda Phase II configuration. In this talk I present the A/E analysis, the calibration of the cut parameters and the results in terms of background reduction for the data taken with these enriched BEGe.

  10. GERDA, a GERmanium Detector Array for the search for neutrinoless ββ decay in 76Ge

    International Nuclear Information System (INIS)

    Pandola, L.; Tomei, C.

    2006-01-01

    The GERDA project, searching for neutrinoless double beta-decay of 76Ge with enriched germanium detectors submerged in a cryogenic bath, has been approved for installation at the Gran Sasso National Laboratory (LNGS), Italy. The GERDA technique is aiming at a dramatic reduction of the background due to radioactive contaminations of the materials surrounding the detectors. This will lead to a sensitivity of about 1026 years on the half-life of neutrinoless double beta decay. Already in the first phase of the experiment, GERDA will be able to investigate with high statistical significance the claimed evidence for neutrinoless double beta decay of 76Ge based on the data of the Heidelberg-Moscow experiment

  11. Home and away - Raymond Pettibon and Marko Mäetamm / Alistair Hicks, Elo-Hanna Seljamaa, Marko Mäetamm, Liina Siib

    Index Scriptorium Estoniae

    2015-01-01

    Vestluringis on näituse „Kodus ja võõrsil. Raymond Pettibon: Ameerika unelmas elades. Marko Mäetamm: Tunne end nagu kodus” kuraator Alistair Hicks, Marko Mäetamm, Elo-Hanna Seljamaa ja Liina Siib

  12. Limit on the radiative neutrinoless double electron capture of {sup 36}Ar from GERDA Phase I

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M.; Balata, M.; D' Andrea, V.; Di Vacri, A.; Junker, M.; Laubenstein, M. [INFN Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, Assergi (Italy); Allardt, M.; Domula, A.; Lehnert, B.; Schneider, B.; Wester, T.; Wilsenach, H.; Zuber, K. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); Bakalyarov, A.M.; Belyaev, S.T.; Lebedev, V.I.; Zhukov, S.V. [National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Barabanov, I.; Bezrukov, L.; Doroshkevich, E.; Fedorova, O.; Gurentsov, V.; Kazalov, V.; Kuzminov, V.V.; Lubsandorzhiev, B.; Moseev, P.; Selivanenko, O.; Veresnikova, A.; Yanovich, E. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Barros, N. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); University of Pennsylvania, Philadelphia, PA (United States); Baudis, L.; Benato, G.; Kish, A.; Miloradovic, M.; Mingazheva, R.; Walter, M. [Physik Institut der Universitaet Zuerich, Zurich (Switzerland); Bauer, C.; Hakenmueller, J.; Heisel, M.; Heusser, G.; Hofmann, W.; Kihm, T.; Kirsch, A.; Knoepfle, K.T.; Lindner, M.; Maneschg, W.; Salathe, M.; Schreiner, J.; Schwingenheuer, B.; Simgen, H.; Smolnikov, A.; Stepaniuk, M.; Wagner, V.; Wegmann, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Bellotti, E. [Universita Milano Bicocca, Dipartimento di Fisica, Milan (Italy); INFN Milano Bicocca, Milan (Italy); Belogurov, S.; Kornoukhov, V.N. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Institute for Theoretical and Experimental Physics NRC ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Bettini, A.; Brugnera, R.; Garfagnini, A.; Medinaceli, E.; Sada, C.; Sturm, K. von [Dipartimento di Fisica e Astronomia dell' Universita di Padova, Padua (Italy); INFN Padova, Padua (Italy); Bode, T.; Csathy, J.J.; Lazzaro, A.; Schoenert, S.; Wiesinger, C. [Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Borowicz, D. [Jagiellonian University, Institute of Physics, Krakow (Poland); Joint Institute for Nuclear Research, Dubna (Russian Federation); Brudanin, V.; Egorov, V.; Kochetov, O.; Nemchenok, I.; Rumyantseva, N.; Zhitnikov, I.; Zinatulina, D. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Caldwell, A.; Gooch, C.; Kneissl, R.; Liao, H.Y.; Majorovits, B.; Palioselitis, D.; Schulz, O.; Vanhoefer, L. [Max-Planck-Institut fuer Physik, Munich (Germany); Cattadori, C.; Salamida, F. [INFN Milano Bicocca, Milan (Italy); Chernogorov, A.; Demidova, E.V.; Kirpichnikov, I.V.; Vasenko, A.A. [Institute for Theoretical and Experimental Physics NRC ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Falkenstein, R.; Freund, K.; Grabmayr, P.; Hegai, A.; Jochum, J.; Schmitt, C.; Schuetz, A.K. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Frodyma, N.; Misiaszek, M.; Panas, K.; Pelczar, K.; Wojcik, M.; Zuzel, G. [Jagiellonian University, Institute of Physics, Krakow (Poland); Gangapshev, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Gusev, K. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Hemmer, S.; Lippi, I.; Stanco, L. [INFN Padova, Padua (Italy); Hult, M.; Lutter, G. [European Commission, JRC-Geel, Geel (Belgium); Inzhechik, L.V. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Moscow Institute of Physics and Technology, Moscow (Russian Federation); Klimenko, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); International University for Nature, Society and Man ' ' Dubna' ' , Dubna (Russian Federation); Lubashevskiy, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Macolino, C. [INFN Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, Assergi (Italy); LAL, CNRS/IN2P3, Universite Paris-Saclay, Orsay (France); Pandola, L. [INFN Laboratori Nazionali del Sud, Catania (Italy); Pullia, A.; Riboldi, S. [Universita degli Studi di Milano, Dipartimento di Fisica, Milan (Italy); INFN Milano (Italy); Shirchenko, M. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Collaboration: GERDA collaboration

    2016-12-15

    Neutrinoless double electron capture is a process that, if detected, would give evidence of lepton number violation and the Majorana nature of neutrinos. A search for neutrinoless double electron capture of {sup 36}Ar has been performed with germanium detectors installed in liquid argon using data from Phase I of the GERmanium Detector Array (Gerda) experiment at the Gran Sasso Laboratory of INFN, Italy. No signal was observed and an experimental lower limit on the half-life of the radiative neutrinoless double electron capture of {sup 36}Ar was established: T{sub 1/2} > 3.6 x 10{sup 21} years at 90% CI. (orig.)

  13. Results on decay with emission of two neutrinos or Majorons in Ge from GERDA Phase I

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; di Vacri, A.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Fedorova, O.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Csáthy, J. Janicskó; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schütz, A.-K.; Schulz, O.; Schwingenheuer, B.; Selivanenko, O.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Stepaniuk, M.; Ur, C. A.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wilsenach, H.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2015-09-01

    A search for neutrinoless decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Processes with spectral indices were searched for. No signals were found and lower limits of the order of 10 yr on their half-lives were derived, yielding substantially improved results compared to previous experiments with Ge. A new result for the half-life of the neutrino-accompanied decay of Ge with significantly reduced uncertainties is also given, resulting in yr.

  14. Limit on Neutrinoless Double Beta Decay of 76Ge by GERDA

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Andreotti, E.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Heider, M. Barabè; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Cossavella, F.; Demidova, E. V.; Domula, A.; Egorov, V.; Falkenstein, R.; Ferella, A.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gotti, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Guthikonda, K. K.; Hampel, W.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Csáthy, J. Janicskó; Jochum, J.; Junker, M.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Machado, A. A.; Macolino, C.; Majorovits, B.; Maneschg, W.; Misiaszek, M.; Nemchenok, I.; Nisi, S.; Shaughnessy, C. O.'.; Pandola, L.; Pelczar, K.; Pessina, G.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schreiner, J.; Schulz, O.; Schwingenheuer, B.; Schönert, S.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Strecker, H.; Tarka, M.; Ur, C. A.; Vasenko, A. A.; Volynets, O.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    The Gerda experiment at the Laboratori Nazionali del Gran Sasso in Italy uses germanium detectors made from material with an enriched 76Ge isotope fraction to search for neutrinoless double beta decay of this nucleus. Applying a blind analysis we find no signal after an exposure of 21.6 kg·yr and a background of about 0.01 cts/(keV·kg·yr). A half-life limit of Tov1/2> 2.1 · 1025 yr (90% C.L.) is extracted. The previous claim of a signal for 76Ge is excluded with 99% probability in a model independent way.

  15. Limit on the radiative neutrinoless double electron capture of ^{36}Ar from GERDA Phase I

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barros, N.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; di Vacri, A.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Fedorova, O.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Csáthy, J. Janicskó; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schütz, A.-K.; Schulz, O.; Schwingenheuer, B.; Selivanenko, O.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Stepaniuk, M.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wilsenach, H.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2016-12-01

    Neutrinoless double electron capture is a process that, if detected, would give evidence of lepton number violation and the Majorana nature of neutrinos. A search for neutrinoless double electron capture of ^{36}Ar has been performed with germanium detectors installed in liquid argon using data from Phase I of the GERmanium Detector Array ( Gerda) experiment at the Gran Sasso Laboratory of INFN, Italy. No signal was observed and an experimental lower limit on the half-life of the radiative neutrinoless double electron capture of ^{36}Ar was established: T_{1/2} > 3.6 × 10^{21} years at 90% CI.

  16. Active background suppression with the liquid argon scintillation veto of GERDA Phase II

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; Di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schulz, O.; Schütz, A.-K.; Schwingenheuer, B.; Selivanenko, O.; Shevzik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2017-09-01

    The observation of neutrinoless double beta decay would allow to shed light onto the particle nature of neutrinos. Gerda is aiming to perform a background-free search for this process using high purity germanium detectors enriched in 76Ge operated in liquid argon. This goal relies on the application of active background suppression techniques. A low background light instrumentation has been installed for Phase II to detect events with coincident energy deposition in the nearby liquid argon. The intended background index of ˜10-3 cts/(keV·ky·yr) has been confirmed.

  17. Enesetapp - rääkida või vaikida? / Gerda Kordemets, Mart Laisk ja Merike Sisask ; intervjueerinud Tiina Jõgeda

    Index Scriptorium Estoniae

    Kordemets, Gerda, 1960-

    2010-01-01

    Kas noorte enesetappudest rääkimine toob matkijaid või on teemast rääkimine vajalik? Suitsiiditeemaga kokku puutunud Mart Laisk, Eesti Televisiooni uue sarja "Klass: elu pärast" üks režissööre Gerda Kordemets ja suitsidoloog Merike Sisask arutlevad

  18. Investigation of n{sup +} surface events in HPGe detectors for liquid argon background rejection in GERDA

    Energy Technology Data Exchange (ETDEWEB)

    Lehnert, Bjoern [TU-Dresden, Dresden (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    The GERDA experiment is searching for neutrinoless double beta decay (0νββ) in {sup 76}Ge using an array of germanium detectors immersed in liquid argon (LAr). Phase II of the experiment aims to improve the background level by a factor 10 in order to reach 10{sup -3} counts / (kg.keV.yr). A strong suppression technique is required to suppress the intrinsic LAr background of {sup 42}Ar/{sup 42}K. 30 newly produced p-type Broad Energy Germanium (BEGe) detectors will be deployed in Phase II. The n{sup +} electrode of the GERDA BEGe detectors is covering 96-98 % of the surface and is between 0.5 and 1.2 mm thick. Betas from the {sup 42}K decay can penetrated the detector surface and deposit energies within the 0νββ region. Experiences from GERDA Phase I show that these surface events are the dominate background component without suppression. Energy depositions inside the n{sup +} layer create pulse shapes that are slower than those from interactions in the bulk. This talk presents a rejection technique for those events. The signal development inside the n{sup +} layer is modeled and applied in Geant4 Monte Carlo simulations. The simulations are compared with data for {sup 241}Am and {sup 90}Sr calibration source measurements. The suppression capabilities are extrapolated for {sup 42}K in GERDA Phase II.

  19. The Gerda experiment for the search of 0{nu}{beta}{beta} decay in {sup 76}Ge

    Energy Technology Data Exchange (ETDEWEB)

    Ackermann, K.H.; Altmann, M.; Becerici-Schmidt, N.; Caldwell, A.; Cossavella, F.; Lenz, D.; Liao, H.; Majorovits, B.; Mayer, S.; O' Shaughnessy, C.; Schubert, J.; Schulz, O.; Seitz, H.; Stelzer, F.; Vogt, S.; Volynets, O. [Max-Planck-Institut fuer Physik, Muenchen (Germany); Agostini, M.; Bode, T.; Budjas, D.; Janicsko Csathy, J.; Lazzaro, A.; Schoenert, S. [Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Allardt, M.; Barros, N.; Domula, A.; Lehnert, B.; Zuber, K. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); Andreotti, E. [Institute for Reference Materials and Measurements, Geel (Belgium); Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Bakalyarov, A.M.; Belyaev, S.T.; Lebedev, V.I.; Zhukov, S.V. [National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Balata, M.; Ioannucci, L.; Junker, M.; Laubenstein, M.; Nisi, S.; Pandola, L. [LNGS, INFN Laboratori Nazionali del Gran Sasso, Assergi (Italy); Barabanov, I.; Bezrukov, L.; Denisov, A.; Gurentsov, V.; Kianovsky, S.; Kusminov, V.; Lubsandorzhiev, B.; Yanovich, E. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Barnabe Heider, M. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); CEGEP St-Hyacinthe, Quebec (Canada); Baudis, L.; Benato, G.; Ferella, A.; Froborg, F.; Guthikonda, K.K.; Tarka, M.; Walter, M. [Physik Institut der Universitaet Zuerich, Zuerich (Switzerland); Bauer, C.; Hampel, W.; Heisel, M.; Heusser, G.; Hofmann, W.; Kankanyan, R.; Kihm, T.; Kiko, J.; Kirsch, A.; Knoepfle, K.T.; Lindner, M.; Lubashevskiy, A.; Machado, A.A.; Maneschg, W.; Oehm, J.; Salathe, M.; Schreiner, J.; Schwan, U.; Schwingenheuer, B.; Simgen, H.; Smolnikov, A.; Strecker, H.; Wagner, V.; Wegmann, A. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Bellotti, E. [Universita Milano Bicocca, Dipartimento di Fisica, Milano (Italy); INFN Milano Bicocca, Milano (Italy); Belogurov, S.; Kornoukhov, V.N. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Bettini, A.; Brugnera, R.; Garfagnini, A.; Hemmer, S.; Sada, C. [Dipartimento di Fisica e Astronomia dell' Universita di Padova, Padova (Italy); INFN Padova, Padova (Italy); Brudanin, V.; Egorov, V.; Kochetov, O.; Nemchenok, I.; Shevchik, E.; Zhitnikov, I.; Zinatulina, D. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Cattadori, C. [INFN Milano Bicocca, Milano (Italy); Chernogorov, A.; Demidova, E.V.; Kirpichnikov, I.V.; Vasenko, A.A. [Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Chkvorets, O. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Laurentian University, Sudbury (Canada); D' Andragora, A. [LNGS, INFN Laboratori Nazionali del Gran Sasso, Assergi (Italy); Brookhaven National Laboratory, Upton, NY (United States); Di Vacri, A. [LNGS, INFN Laboratori Nazionali del Gran Sasso, Assergi (Italy); University ' ' G. d' Annunzio' ' di Chieti-Pescara, Department of Neurosciences and Imaging, Chieti (Italy); Falkenstein, R.; Freund, K.; Grabmayr, P.; Hegai, A.; Jochum, J.; Knapp, M.; Niedermeier, L.; Schmitt, C.; Sturm, K. von [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Frodyma, N.; Pelczar, K.; Wojcik, M.; Zuzel, G. [Jagiellonian University, Institute of Physics, Cracow (Poland); Gangapshev, A. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Gasparro, J. [Institute for Reference Materials and Measurements, Geel (Belgium); National Physical Laboratory, Teddigton (United Kingdom); Gazzana, S. [LNGS, INFN Laboratori Nazionali del Gran Sasso, Assergi (Italy); Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Gonzalez de Orduna, R.; Hult, M.; Marissens, G. [Institute for Reference Materials and Measurements, Geel (Belgium); Gusev, K. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Inzhechik, L.V. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Moscow Institute of Physics and Technology, Moscow (Russian Federation); Klimenko, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Kroeninger, K. [Max-Planck-Institut fuer Physik, Muenchen (Germany); U. Goettingen, II. Physikalisches Institut, Goettingen (Germany); U. Siegen, Department Physik, Siegen (Germany); Lippi, I.; Rossi Alvarez, C.; Stanco, L.; Ur, C.A. [INFN Padova, Padova (Italy); Liu, J. [Max-Planck-Institut fuer Physik, Muenchen (Germany); University of Tokyo, Kavli IPMU, Tokyo (Japan); Liu, X. [Shanghai Jiaotong University, Shanghai (China); Meierhofer, G. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); TUeV-SUeD, Muenchen (Germany); Peiffer, P. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Karlsruhe Institute of Technology (KIT), Karlsruhe (Germany); Pullia, A.; Riboldi, S. [Universita degli Studi di Milano (Italy); INFN Milano, Dipartimento di Fisica, Milano (Italy); Ritter, F. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Robert Bosch GmbH, Reutlingen (Germany); Shirchenko, M. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Trunk, U. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); DESY, Photon-Science Detector Group, Hamburg (Germany); Zavarise, P. [LNGS, INFN Laboratori Nazionali del Gran Sasso, Assergi (Italy); University of L' Aquila, Dipartimento di Fisica, L' Aquila (Italy)

    2013-03-15

    The Gerda collaboration is performing a search for neutrinoless double beta decay of {sup 76}Ge with the eponymous detector. The experiment has been installed and commissioned at the Laboratori Nazionali del Gran Sasso and has started operation in November 2011. The design, construction and first operational results are described, along with detailed information from the R and D phase. (orig.)

  20. Signal and background studies for the search of neutrinoless double beta decay in GERDA

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, Matteo

    2013-04-24

    The GERDA experiment searches for the neutrinoless double beta decay in Ge-76, by operating bare HPGe detectors in ultra-pure liquid Ar. This dissertation presents a first decomposition of the background measured in the current data-taking phase. The background at the energy of interest was found to be dominated by {sup 214}Bi, {sup 208}Tl and {sup 42}K gamma-rays, with secondary contributions from {sup 42}K and {sup 214}Bi beta-rays, and {sup 210}Po alpha-rays. For the forthcoming upgrade of the apparatus, a new HPGe detector design (BEGe) has been studied, with focus on its capability of suppressing the identified backgrounds through pulse shape analysis. This included the development of a comprehensive modeling of the detectors and the experimental characterization of their response to surface interactions. The achieved results show that GERDA can improve the present limit on the neutrinoless double beta decay half-life by an order of magnitude.

  1. Mitigation of {sup 42}Ar/{sup 42}K background for the GERDA Phase II experiment

    Energy Technology Data Exchange (ETDEWEB)

    Lubashevskiy, A.; Klimenko, A.; Smolnikov, A. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Joint Institute for Nuclear Research, Dubna (Russian Federation); Agostini, M. [Gran Sasso Science Institute, L' Aquila (Italy); Budjas, D.; Lazzaro, A.; Schoenert, S. [Technische Universitaet Muenchen, Physik Department E15, Munich (Germany); Gangapshev, A. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research, Russian Academy of Sciences, Moscow (Russian Federation); Gusev, K. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Technische Universitaet Muenchen, Physik Department E15, Munich (Germany); Russian Research Center Kurchatov Institute, Moscow (Russian Federation); Heisel, M. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Lehnert, B. [Institut fuer Kern- und Teilchenphysik Technische Universitaet Dresden, Dresden (Germany); Carleton University, Physics Department, Ottawa (Canada); Pelczar, K. [Jagellonian University, Institute of Physics, Cracow (Poland); INFN Laboratori Nazionali del Gran Sasso, LNGS, Assergi (Italy); Walter, M. [Physik Institut der Universitaet Zuerich, Zurich (Switzerland); Zuzel, G. [Jagellonian University, Institute of Physics, Cracow (Poland)

    2018-01-15

    Background coming from the {sup 42}Ar decay chain is considered to be one of the most relevant for the Gerda experiment, which searches for the neutrinoless double beta decay of {sup 76}Ge. The sensitivity strongly relies on the absence of background around the Q-value of the decay. Background coming from {sup 42}K, a progeny of {sup 42}Ar, can contribute to that background via electrons from the continuous spectrum with an endpoint at 3.5 MeV. Research and development on the suppression methods targeting this source of background were performed at the low-background test facility LArGe. It was demonstrated that by reducing {sup 42}K ion collection on the surfaces of the broad energy germanium detectors in combination with pulse shape discrimination techniques and an argon scintillation veto, it is possible to suppress {sup 42}K background by three orders of magnitude. This is sufficient for Phase II of the Gerda experiment. (orig.)

  2. Production and characterization of 228Th calibration sources with low neutron emission for GERDA

    Science.gov (United States)

    Baudis, L.; Benato, G.; Carconi, P.; Cattadori, C.; De Felice, P.; Eberhardt, K.; Eichler, R.; Petrucci, A.; Tarka, M.; Walter, M.

    2015-12-01

    The GERDA experiment at the Laboratori Nazionali del Gran Sasso (LNGS) searches for the neutrinoless double beta decay of 76Ge. In view of the GERDA Phase II data collection, four new 228Th radioactive sources for the calibration of the germanium detectors enriched in 76Ge have been produced with a new technique, leading to a reduced neutron emission rate from (α, n) reactions. The gamma activities of the sources were determined with a total uncertainty of ~4% using an ultra-low background HPGe detector operated underground at LNGS. The neutron emission rate was determined using a low background LiI(Eu) detector and a 3He counter at LNGS. In both cases, the measured neutron activity is ~10-6 n/(sṡBq), with a reduction of about one order of magnitude with respect to commercially available 228Th sources. Additionally, a specific leak test with a sensitivity to leaks down to ~10 mBq was developed to investigate the tightness of the stainless steel capsules housing the sources after their use in cryogenic environment.

  3. GERDA phase II detectors: Behind the production and characterisation at low background conditions

    Energy Technology Data Exchange (ETDEWEB)

    Maneschg, Werner [Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany); Collaboration: GERDA Collaboration; and others

    2013-08-08

    The low background GERmanium Detector Array (GERDA) at Laboratori Nazionali del Gran Sasso (LNGS) is designed to search for the rare neutrinoless double beta decay (0νββ) in {sup 76}Ge. Bare germanium diodes are operated in liquid argon which is used as coolant, as passive and soon active as well shield against external radiation. Currently, Phase I of the experiment is running using ∼15 kg of co-axial High Purity Germanium diodes. In order to increase the sensitivity of the experiment 30 Broad Energy Germanium (BEGe) diodes will be added within 2013. This presentation reviews the production chain of the new BEGe detectors from isotopic enrichment to diode production and testing. As demonstrated all steps were carefully planned in order to minimize the exposure of the enriched germanium to cosmic radiation. Following this premise, acceptance and characterisation measurement of the newly produced diodes have been performed within the HEROICA project in the Belgian underground laboratory HADES close to the diode manufacturer. The test program and the results from a subset of the recently terminated GERDA Phase II BEGe survey will be presented.

  4. GERDA and the search for neutrinoless double beta decay: first results and perspectives

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, Matteo [Physik Department and Excellence Cluster Universe, Technische Universitaet Muenchen (Germany); Collaboration: GERDA-Collaboration

    2014-07-01

    Neutrinoless double beta decay is a lepton-number-violating nuclear transition predicted by several extensions of the Standard Model. The Gerda experiment searches for this transition in {sup 76}Ge by operating bare Ge detectors in liquid Ar. The talk focuses on the results of data acquired during Phase I of the experiment, in which 21.6 kg.yr of exposure were accumulated with a background index of about 0.01 cts/(keV.kg.yr). No signal was observed and a lower limit was derived for the half-life of neutrinoless double beta decay of {sup 76}Ge, T{sub 1/2} > 2.1 . 10{sup 25} yr (90% C.L.). The experiment is currently undergoing a major upgrade in preparation for the next phase of data taking. Thanks to an increased target mass, an improved energy resolution and the introduction of novel background reduction techniques, the sensitivity of Gerda will increase of about one order of magnitude in a few years of operation.

  5. Flux modulations seen by the muon veto of the GERDA experiment

    Science.gov (United States)

    GERDA Collaboration; Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; di Vacri, A.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Fedorova, O.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hegai, A.; Heisel, M.; Hemmer, S.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Ioannucci, L.; Janicsk'o Cs'athy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knapp, M.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Ritter, F.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schütz, A.-K.; Schulz, O.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Stepaniuk, M.; Strecker, H.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wilsenach, H.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2016-11-01

    The GERDA experiment at LNGS of INFN is equipped with an active muon veto. The main part of the system is a water Cherenkov veto with 66 PMTs in the water tank surrounding the GERDA cryostat. The muon flux recorded by this veto shows a seasonal modulation. Two causes have been identified: (i) secondary muons from the CNGS neutrino beam (2.2%) and (ii) a temperature modulation of the atmosphere (1.4%). A mean cosmic muon rate of Iμ0 =(3.477 ± 0 .002stat ± 0 .067sys) ×10-4 /(s · m2) was found in good agreement with other experiments at LNGS. Combining the present result with those from previous experiments at LNGS the effective temperature coefficient αT , Lngs is determined to 0.93 ± 0.03. A fit of the temperature coefficients measured at various underground sites yields a kaon to pion ratio rK/π of 0.10 ± 0.03.

  6. WATER TEMPERATURE and other data from GERDA and CALANUS from 1972-03-14 to 1972-03-24 (NCEI Accession 9500067)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The data in this accession were collected from ships CALANUS and GERDA between March 14, 1972 and March 24, 1972. The real time data of water temperature at varying...

  7. Kibe kolimine Mustamäel / Jüri Järs, Gerda Koidla, Hilja Rikmann, Siret Mikumets ; intervjueerinud Taimi Nurmiste

    Index Scriptorium Estoniae

    Järs, Jüri, 1951-

    2009-01-01

    Intervjuu Tallinna Tehnikaülikooli Raamatukogu direktori Jüri Järsi, asedirektori Gerda Koidla, hoidlakogude peaspetsialisti Hilja Rikmanni ja teenindusosakonna avakogude peaspetsialisti Siret Mikumetsaga raamatukogu uude hoonesse kolimise protsessist ja uutest võimalustest teeninduses

  8. Trophodynamics of the Hanna Shoal Ecosystem (Chukchi Sea, Alaska): Connecting multiple end-members to a rich food web

    Science.gov (United States)

    McTigue, N. D.; Dunton, K. H.

    2017-10-01

    Predicting how alterations in sea ice-mediated primary production will impact Arctic food webs remains a challenge in forecasting ecological responses to climate change. One top-down approach to this challenge is to elucidate trophic roles of consumers as either specialists (i.e., consumers of predominantly one food resource) or generalists (i.e., consumers of multiple food resources) to categorize the dependence of consumers on each primary producer. At Hanna Shoal in the Chukchi Sea, Alaska, we used stable carbon and nitrogen isotope data to quantify trophic redundancy with standard ellipse areas at both the species and trophic guild levels. We also investigated species-level trophic plasticity by analyzing the varying extents that three end-members were assimilated by the food web using the mixing model simmr (Stable Isotope Mixing Model in R). Our results showed that ice algae, a combined phytoplankton and sediment organic matter composite (PSOM), and a hypothesized microphytobenthos (MPB) component were incorporated by consumers in the benthic food web, but their importance varied by species. Some primary consumers relied heavily on PSOM (e.g, the amphipods Ampelisca sp. and Byblis sp.; the copepod Calanus sp.), while others exhibited generalist feeding and obtained nutrition from multiple sources (e.g., the holothuroidean Ocnus glacialis, the gastropod Tachyrhynchus sp., the sipunculid Golfingia margaritacea, and the bivalves Ennucula tenuis, Nuculana pernula, Macoma sp., and Yoldia hyperborea). Most higher trophic level benthic predators, including the gastropods Buccinum sp., Cryptonatica affinis, and Neptunea sp, the seastar Leptasterias groenlandica, and the amphipod Anonyx sp. also exhibited trophic plasticity by coupling energy pathways from multiple primary producers including PSOM, ice algae, and MPB. Our stable isotope data indicate that consumers in the Hanna Shoal food web exhibit considerable trophic redundancy, while few species were specialists

  9. Kuidas ennast ise juhtida / Susanne Paulsen

    Index Scriptorium Estoniae

    Paulsen, Susanne

    2009-01-01

    Rosenecki biotagasiside-eksperdid õpetavad, kuidas inimene võib oma keha üksnes tahtejõu abil mõjutada. Aju-arvuti-liidese kaudu on võimalik mõjutada selliseid haigusi nagu hüperaktiivsus, epilepsia ja migreen

  10. Muonic background in the GERDA 0νββ experiment

    Energy Technology Data Exchange (ETDEWEB)

    Freund, Kai Lorenz

    2014-07-18

    Muons can cause a non-negligible background in rare-event experiments like GERDA which searches for the neutrinoless double-beta decay (0νββ) in the isotope {sup 76}Ge. The kinetic energy of cosmogenic muons depends on the progenitor particle, hence they can have an energy which is high enough to penetrate even the deepest underground laboratory. For this reason GERDA is equipped with a powerful muon veto system which in most parts was developed in Tuebingen. In this work, a plastic scintillator veto was added to the existing water Cherenkov veto in order to protect a weak spot. Existing hardware was maintained, frequently calibrated and faulty modules exchanged when possible. The DAQ and analysis was upgraded in order to run both veto systems simultaneously. The system was simulated with a GEANT4-based Monte-Carlo simulation. Multiplicity and photon spectra of the simulations were found to be in good agreement with the experimental data and give an efficiency for the detection of energy-depositing muons of ε{sup sim}{sub μd}=(99.935±0.015)%. Two external effects were clearly identified in the muon veto data: additional muons originating from the CNGS-beam at CERN and an annual flux modulation due to seasonal atmospheric temperature changes. Both effects were measured with high precision and agree well with other experiments. Coincidences with the germanium detectors were studied and muon-germanium coincidences were clearly identified. By defining a muon cut, a muon rejection efficiency of the germanium detectors of ε{sup Ge}{sub μr}=(99.2{sup +0.3}{sub -0.4})% was found. Two methods were pursued to find radioactive isotopes produced by muons through spallation or neutron activation. The result of both methods is compatible with zero, i.e. no events could be clearly identified. The overall functionality of the muon veto for Phase I of GERDA was successfully maintained and verified.

  11. GERDA results and the future perspectives for the neutrinoless double beta decay search using 76Ge

    Science.gov (United States)

    Agostini, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Bettini, A.; Bezrukov, L.; Biernat, J.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Comellato, T.; D’Andrea, V.; Demidova, E. V.; di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Gangapshev, A.; Garfagnini, A.; Giordano, M.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Heisel, M.; Hemmer, S.; Hiller, R.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kermaidic, Y.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Panas, K.; Pandola, L.; Pelczar, K.; Pertoldi, L.; Pullia, A.; Ransom, C.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Schneider, B.; Schönert, S.; Schreiner, J.; Schütz, A.-K.; Schulz, O.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zschocke, A.; Zsigmond, A. J.; Zuber, K.; Zuzel, G.

    2018-03-01

    The GERmanium Detector Array (GERDA) is a low background experiment at the Laboratori Nazionali del Gran Sasso (LNGS) of INFN designed to search for the rare neutrinoless double beta decay (0νββ) of 76Ge. In the first phase (Phase I) of the experiment, high purity germanium diodes were operated in a “bare” mode and immersed in liquid argon. The overall background level of 10‑2cts/(keV ṡkg ṡyr) was a factor of ten better than those of its predecessors. No signal was found and a lower limit was set on the half-life for the 0νββ decay of 76Ge T1/20ν > 2.1 × 1025 yr (90% CL), while the corresponding median sensitivity was 2.4 × 1025 yr (90% CL). A second phase (Phase II) started at the end of 2015 after a major upgrade. Thanks to the increased detector mass and performance of the enriched germanium diodes and due to the introduction of liquid argon instrumentation techniques, it was possible to reduce the background down to 10‑3cts/(keV ṡkg ṡyr). After analyzing 23.2 kgṡyr of these new data no signal was seen. Combining these with the data from Phase I a stronger half-life limit of the 76Ge 0νββ decay was obtained: T1/20ν > 8.0 × 1025 yr (90% CL), reaching a sensitivity of 5.8 × 1025 yr (90% CL). Phase II will continue for the collection of an exposure of 100 kg ṡyr. If no signal is found by then the GERDA sensitivity will have reached 1.4 × 1026 yr for setting a 90% CL. limit. After the end of GERDA Phase II, the flagship experiment for the search of 0νββ decay of 76Ge will be LEGEND. LEGEND experiment is foreseen to deploy up to 1-ton of 76Ge. After ten years of data taking, it will reach a sensitivity beyond 1028 yr, and hence fully cover the inverted hierarchy region.

  12. TINGKAT DAN RAGAM KONSUMSI PANGAN GOLONGAN USIA LANJUT DI PANTI WERDHA BUDI LUHUR DAN HANNA DI YOGYAKARTA

    Directory of Open Access Journals (Sweden)

    Erna Luciasari

    2012-11-01

    Full Text Available Number of the elderly is increasing relatively fast in Indonesia. It is estimated by the US Bureau of the Cencus that this country will be the fourth in the world regarding the big number of it. As they are becoming older the physiological functions become weaker, it includes the function of intestine which influence the kind of food they can eat. This study has been carried out as to collect information's regarding level and variety of foods consumed by the elderly. A number of 53 elderly reside in two nursing homes, i.e. Budi Luhur and Hanna in Yogyakarta have been involved in the study. Important results show that most of the elderly used to eat main dish meal three times and snacks one-two time daily. The main staple food is rice which contributes 60-70% of total energy intake. Foods of fat sources contribute 15-20% of energy intake. Foods of animal protein sources are consumed 30-50 gram daily, and 50-100 gram of plant protein sources such as fermented soybean (tempe. Drinking water are drunk 6-9 glasses a day. By consuming such level and variety of foods, 47% of elderly are relatively thin, 47% sedentary and 6% relatively obese.Keywords: foods consume, elderly, nursing home

  13. Hurricane Ingrid and Tropical Storm Hanna's effects on the salinity of the coastal aquifer, Quintana Roo, Mexico

    Science.gov (United States)

    Kovacs, Shawn E.; Reinhardt, Eduard G.; Stastna, Marek; Coutino, Aaron; Werner, Christopher; Collins, Shawn V.; Devos, Fred; Le Maillot, Christophe

    2017-08-01

    There is a lack of information on aquifer dynamics in anchialine systems, especially in the Yucatán Peninsula of Mexico. Most of our knowledge is based on ;spot; measurements of the aquifer with no long-term temporal monitoring. In this study spanning four years (2012-2016), sensors (water depth and conductivity (salinity)) were deployed and positioned (-9 and -10 m) in the meteoric Water Mass (WM) close to the transition with the marine WM (halocline) in 2 monitoring sites within the Yax Chen cave system to investigate precipitation effects on the salinity of the coastal aquifer. The results show variation in salinity (95 mm) such as Hurricane Ingrid (2013) and Tropical Storm Hanna (2014) shows meteoric water mass salinity rapidly increasing (approx. 6.39 to >8.6 ppt), but these perturbations have a shorter duration (weeks and days). Wavelet analysis of the salinity record indicates seasonal mixing effects in agreement with the wet and dry periods, but also seasonal effects of tidal mixing (meteoric and marine water masses) occurring on shorter time scales (diurnal and semi-diurnal). These results demonstrate that the salinity of the freshwater lens is influenced by precipitation and turbulent mixing with the marine WM. The salinity response is scaled with precipitation; larger more intense rainfall events (>95 mm) create a larger response in terms of the magnitude and duration of the salinity perturbation (>1 ppt). The balance of precipitation and its intensity controls the temporal and spatial patterning of meteoric WM salinity.

  14. Results on neutrinoless double beta decay search in GERDA. Background modeling and limit setting

    Energy Technology Data Exchange (ETDEWEB)

    Becerici Schmidt, Neslihan

    2014-07-22

    The search for the neutrinoless double beta decay (0νββ) process is primarily motivated by its potential of revealing the possible Majorana nature of the neutrino, in which the neutrino is identical to its antiparticle. It has also the potential to yield information on the intrinsic properties of neutrinos, if the underlying mechanism is the exchange of a light Majorana neutrino. The Gerda experiment is searching for 0νββ decay of {sup 76}Ge by operating high purity germanium (HPGe) detectors enriched in the isotope {sup 76}Ge (∝ 87%), directly in ultra-pure liquid argon (LAr). The first phase of physics data taking (Phase I) was completed in 2013 and has yielded 21.6 kg.yr of data. A background index of B∼10{sup -2} cts/(keV.kg.yr) at Q{sub ββ}=2039 keV has been achieved. A comprehensive background model of the Phase I energy spectrum is presented as the major topic of this dissertation. Decomposition of the background energy spectrum into the individual contributions from different processes provides many interesting physics results. The specific activity of {sup 39}Ar has been determined. The obtained result, A=(1.15±0.11) Bq/kg, is in good agreement with the values reported in literature. The contribution from {sup 42}K decays in LAr to the background spectrum has yielded a {sup 42}K({sup 42}Ar) specific activity of A=(106.2{sub -19.2}{sup +12.7}) μBq/kg, for which only upper limits exist in literature. The analysis of high energy events induced by α decays in the {sup 226}Ra chain indicated a total {sup 226}Ra activity of (3.0±0.9) μBq and a total initial {sup 210}Po activity of (0.18±0.01) mBq on the p{sup +} surfaces of the enriched semi-coaxial HPGe detectors. The half life of the two-neutrino double beta (2νββ) decay of {sup 76}Ge has been determined as T{sub 1/2}{sup 2ν}=(1.926±0.094).10{sup 21} yr, which is in good agreement with the result that was obtained with lower exposure and has been published by the Gerda collaboration

  15. Development and test results of a readout chip for the GERDA experiment

    CERN Document Server

    Smale, Nigel; Knöpfle, K T; Schwingenheuer, B; Trunk, U; Fallot-Burghardt, W

    2007-01-01

    This paper describes the F-CSA104 architecture and its measurement results. The F-CSA104 is for γ spectroscopy with Ge detectors. It is a low noise, fully integrated, four channel XFAB 0.6μm CMOS technology ASIC, that has been developed for the GERDA experiment. Each channel contains a charge sensitive preamplifier (CSA) followed by a 11.7MHz differential line driver. It has been particularly designed to operate in liquid argon (T = 87K/-186°C) and to have a measuring sensitivity of 660e- with an ENC of 110e-, after offline filtering with 10μs shaping, when connected to a 30pF load. Special techniques are used to improve the SNR such as a large input PMOS FET, an integrated 500MΩ CSA feedback resistor and a noise degeneration drain resistor.

  16. Keeping the Background Low: Production and Testing of the GERDA Phase II Detectors

    International Nuclear Information System (INIS)

    Hemmer, Sabine

    2013-06-01

    The Germanium Detector Array (GERDA) experiment at the INFN Laboratori Nazionali del Gran Sasso searches for neutrinoless double beta decay of 76 Ge. The first phase using ∼15 kg of coaxial germanium detectors is ongoing. In a second phase, additional ∼20 kg of newly produced Broad Energy Germanium (BEGe) detectors will be deployed. To limit the generation of cosmogenically induced radioisotopes, the exposure of the germanium to cosmic radiation during the detector production and testing was minimized. An acceptance and characterization campaign of the newly produced detectors was carried out at the HEROICA facility in the HADES underground laboratory in Mol, Belgium. An overview over the complete production process, from isotopic enrichment of the material to the detector testing protocol, is given. (authors)

  17. Limits on uranium and thorium bulk content in GERDA Phase I detectors

    Science.gov (United States)

    GERDA Collaboration; Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; di Vacri, A.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Fedorova, O.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakemüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schütz, A.-K.; Schulz, O.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Stepaniuk, M.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2017-05-01

    Internal contaminations of 238U, 235U and 232Th in the bulk of high purity germanium detectors are potential backgrounds for experiments searching for neutrinoless double beta decay of 76Ge. The data from GERDA Phase I have been analyzed for alpha events from the decay chain of these contaminations by looking for full decay chains and for time correlations between successive decays in the same detector. No candidate events for a full chain have been found. Upper limits on the activities in the range of a few nBq/kg for 226Ra, 227Ac and 228Th, the long-lived daughter nuclides of 238U, 235U and 232Th, respectively, have been derived. With these upper limits a background index in the energy region of interest from 226Ra and 228Th contamination is estimated which satisfies the prerequisites of a future ton scale germanium double beta decay experiment.

  18. Toxicity of phosphor esters: Willy Lange (1900-1976) and Gerda von Krueger (1907-after 1970).

    Science.gov (United States)

    Petroianu, G A

    2010-10-01

    In 1851 Williamson serendipitously discovered a new and efficient way to produce ethers using ethyl iodide and potassium salts. Based on this new synthetic approach, the Frenchman Philippe de Clermont and the Muscovite Wladimir Moschnin, both élèves of Adolphe Wurtz in his Paris School of Chemistry, achieved the synthesis of the first ester of pyrophosphoric acid (TEPP). de Clermont "tasted" the new compound and although TEPP is a potent cholinesterase inhibitor he failed to recognize its toxicity. Almost a century later, in 1932, Willy Lange (1900-1976) and his graduate student Gerda v. Krueger (1907-after 1970) described the toxicity of organophosphonates. While the classic paper of the two "Uber Ester der Monofluorphosphorsäure." is cited by almost everybody working in the field, little is known about Lange and almost nothing about v. Krueger. This brief communication attempts to shed some light on the life of both.

  19. Results on neutrinoless double beta decay search in GERDA. Background modeling and limit setting

    International Nuclear Information System (INIS)

    Becerici Schmidt, Neslihan

    2014-01-01

    The search for the neutrinoless double beta decay (0νββ) process is primarily motivated by its potential of revealing the possible Majorana nature of the neutrino, in which the neutrino is identical to its antiparticle. It has also the potential to yield information on the intrinsic properties of neutrinos, if the underlying mechanism is the exchange of a light Majorana neutrino. The Gerda experiment is searching for 0νββ decay of 76 Ge by operating high purity germanium (HPGe) detectors enriched in the isotope 76 Ge (∝ 87%), directly in ultra-pure liquid argon (LAr). The first phase of physics data taking (Phase I) was completed in 2013 and has yielded 21.6 kg.yr of data. A background index of B∼10 -2 cts/(keV.kg.yr) at Q ββ =2039 keV has been achieved. A comprehensive background model of the Phase I energy spectrum is presented as the major topic of this dissertation. Decomposition of the background energy spectrum into the individual contributions from different processes provides many interesting physics results. The specific activity of 39 Ar has been determined. The obtained result, A=(1.15±0.11) Bq/kg, is in good agreement with the values reported in literature. The contribution from 42 K decays in LAr to the background spectrum has yielded a 42 K( 42 Ar) specific activity of A=(106.2 -19.2 +12.7 ) μBq/kg, for which only upper limits exist in literature. The analysis of high energy events induced by α decays in the 226 Ra chain indicated a total 226 Ra activity of (3.0±0.9) μBq and a total initial 210 Po activity of (0.18±0.01) mBq on the p + surfaces of the enriched semi-coaxial HPGe detectors. The half life of the two-neutrino double beta (2νββ) decay of 76 Ge has been determined as T 1/2 2ν =(1.926±0.094).10 21 yr, which is in good agreement with the result that was obtained with lower exposure and has been published by the Gerda collaboration. According to the model, the background in Q ββ ±5 keV window is resulting from close

  20. GERDA test facility for pressurized water reactors with straight tube steam generators

    International Nuclear Information System (INIS)

    Ahrens, G.; Haury, G.; Lahner, K.; Schatz, A.

    1983-01-01

    A number of large-scale experimental facilities have been constructed and operate in order to experiment on the thermodynamic and thermohydraulic behaviour of nuclear facilities in case of LOCA. Most of them were designed for ''large leak'' accidents, but as ''small leak'' accidents became the focus of interest, such experiments were also carried out. Experiments carried out with this arrangement for PWR-type reactors with straight-tube steam generators are only partially evaluable. BBR and B and W therefore cooperated in the construction of the test facility GERDA, designed for testing reactors of BBR design. It supplied relevant experimental results for the nuclear power plant at Muelheim-Kaerlich. (orig.) [de

  1. Background-free search for neutrinoless double-β decay of 76Ge with GERDA

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; di Marco, N.; di Vacri, A.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Fedorova, O.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Salathe, M.; Schmitt, C.; Schneider, B.; Schönert, S.; Schreiner, J.; Schulz, O.; Schütz, A.-K.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.; GERDA Collaboration

    2017-04-01

    Many extensions of the Standard Model of particle physics explain the dominance of matter over antimatter in our Universe by neutrinos being their own antiparticles. This would imply the existence of neutrinoless double-β decay, which is an extremely rare lepton-number-violating radioactive decay process whose detection requires the utmost background suppression. Among the programmes that aim to detect this decay, the GERDA Collaboration is searching for neutrinoless double-β decay of 76Ge by operating bare detectors, made of germanium with an enriched 76Ge fraction, in liquid argon. After having completed Phase I of data taking, we have recently launched Phase II. Here we report that in GERDA Phase II we have achieved a background level of approximately 10-3 counts keV-1 kg-1 yr-1. This implies that the experiment is background-free, even when increasing the exposure up to design level. This is achieved by use of an active veto system, superior germanium detector energy resolution and improved background recognition of our new detectors. No signal of neutrinoless double-β decay was found when Phase I and Phase II data were combined, and we deduce a lower-limit half-life of 5.3 × 1025 years at the 90 per cent confidence level. Our half-life sensitivity of 4.0 × 1025 years is competitive with the best experiments that use a substantially larger isotope mass. The potential of an essentially background-free search for neutrinoless double-β decay will facilitate a larger germanium experiment with sensitivity levels that will bring us closer to clarifying whether neutrinos are their own antiparticles.

  2. Gamma-ray spectrometry of ultra low levels of radioactivity within the material screening program for the GERDA experiment.

    Science.gov (United States)

    Budjás, D; Gangapshev, A M; Gasparro, J; Hampel, W; Heisel, M; Heusser, G; Hult, M; Klimenko, A A; Kuzminov, V V; Laubenstein, M; Maneschg, W; Simgen, H; Smolnikov, A A; Tomei, C; Vasiliev, S I

    2009-05-01

    In present and future experiments in the field of rare events physics a background index of 10(-3) counts/(keV kg a) or better in the region of interest is envisaged. A thorough material screening is mandatory in order to achieve this goal. The results of a systematic study of radioactive trace impurities in selected materials using ultra low-level gamma-ray spectrometry in the framework of the GERDA experiment are reported.

  3. Characterization of the first true coaxial 18-fold segmented n-type prototype HPGe detector for the gerda project

    International Nuclear Information System (INIS)

    Abt, I.; Caldwell, A.; Gutknecht, D.; Kroeninger, K.; Lampert, M.; Liu, X.; Majorovits, B.; Quirion, D.; Stelzer, F.; Wendling, P.

    2007-01-01

    The first true coaxial 18-fold segmented n-type HPGe prototype detector produced by Canberra-France for the GERDA neutrinoless double beta-decay project was tested both at Canberra-France and at the Max-Planck-Institut fur Physik in Munich. The main characteristics of the detector are given and measurements concerning detector properties are described. A novel method to establish contacts between the crystal and a Kapton cable is presented

  4. Operation of bare HPGe detectors in LAr/LN{sub 2} for the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Heider, M Barnabe; Chkvorets, O; Schoenert, S [MPI fuer Kernphysik, Heidelberg (Germany); Cattadori, C [INFN-Milano Bicocca, Milano (Italy); Vacri, A di [INFN-LNGS, L' Aquila (Italy); Gusev, K; Shirchenko, M [Russian Research Center Kurchatov Institute, Moscow, Russia and JINR, Dubna (Russian Federation)], E-mail: assunta.divacri@lngs.infn.it

    2008-11-01

    GERDA is designed to search for 0{nu}{beta}{beta}-decay of {sup 76}Ge using high purity germanium detectors (HPGe), enriched ({approx} 85%) in {sup 76}Ge, directly immersed in LAr which acts both as shield against {gamma} radiation and as cooling medium. The cryostat is located in a stainless steel water tank providing an additional shield against external background. The GERDA experiment aims at a background (b) {approx}<10{sup -3} cts/(kg-y-keV) and energy resolution (FWHM) {<=} 4 keV at Q{sub {beta}}{sub {beta}} = 2039 keV. GERDA experiment is foreseen to proceed in two phases. For Phase I, eight reprocessed enriched HPGe detectors from the past HdM [C Balysh et al., Phys. Rev. D 66 (1997) 54] and IGEX [C E Aalseth et al., Phys. of Atomic Nuclei 63 (2000) 1225] experiments ({approx} 18 kg) and six reprocessed natural HPGe detectors ({approx} 15 kg) from the Genius Test-Facility [H V Klapdor et al., HIM A 481 (2002) 149] will be deployed in strings. GERDA aims at b {approx}< 10{sup -2} cts/(kg{center_dot}keV{center_dot}y). With an exposure of {approx} 15 kg{center_dot}y of {sup 76}Ge and resolution {approx} 3.6 keV, the sensitivity on the half-life will be T{sup 0{nu}}{sub 1/2} 3 {center_dot} 10{sup 25} y (90 % C.L.) corresponding to m{sub ee} < 270 meV [V A Rodin et al., Nucl. Phys. A 766 (2006) 107]. In Phase II, new diodes, able to discriminate between single- and multi-site events, will be added ({approx} 20 kg of {sup 76}Ge with intrinsic b {approx} 10{sup -2} cts/(kg{center_dot}keV{center_dot}y). With an exposure of {approx} 120 kg{center_dot}y, it is expected T{sup 0{nu}}{sub 1/2} > 1.5 {center_dot} 10{sup 26} y (90% C.L.) corresponding to m{sub ee} < 110 meV [V A Rodin et al., Nucl. Phys. A 766 (2006) 107]. Three natural p-type HPGe prototypes (different passivation layer designs) are available in the GERDA underground facility at LNGS to investigate the effect of the detector assembly (low-mass low-activity holder), of the handling procedure and of the

  5. The slow control system of the GERDA double beta decay experiment at Gran Sasso

    International Nuclear Information System (INIS)

    Brugnera, R; Garfagnini, A; Gigante, G; Hemmer, S; Zinato, D; Costa, F; Lippi, I; Michelotto, M; Ur, C

    2012-01-01

    GERDA is an experiment designed and built to study double beta decays of 76 Ge. It is currently in operation at the Gran Sasso underground laboratories (LNGS). A custom slow control system has been designed to monitor and control all the critical parameters for the proper functioning of the experiment. The main sub-components of the experiment (Cryostat, Clean Room, Water Tank, electronic crates and temperatures, High Voltage Systems, Radon Monitor and Source Insertion System) are constantly monitored by several distributed clients which write acquired data to a relational database (PostgreSQL). The latter allows to maintain a history of the whole experiment and, performing correlation between different and independent components, is useful to debug possible system malfunctions. The system is complemented by a Web server, a lightweight and efficient interface to the user on shifts and to the on-call experts, and by a dedicated Alarm dispatcher which distributes the errors generated by the components to the users allowing to react in short time. The whole project has been built around open source and custom software.

  6. 2νββ decay of 76Ge into excited states with GERDA phase I

    Science.gov (United States)

    GERDA Collaboration; Agostini, M.; Allardt, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; D'Andrea, V.; Demidova, E. V.; di Vacri, A.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Fedorova, O.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gooch, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Medinaceli, E.; Mi, Y.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Palioselitis, D.; Panas, K.; Pandola, L.; Pelczar, K.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schneider, B.; Schreiner, J.; Schulz, O.; Schwingenheuer, B.; Schönert, S.; Schütz, A.-K.; Selivanenko, O.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Stepaniuk, M.; Ur, C. A.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wilsenach, H.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2015-11-01

    Two neutrino double beta decay of {}76{Ge} to excited states of {}76{Se} has been studied using data from Phase I of the GERDA experiment. An array composed of up to 14 germanium detectors including detectors that have been isotopically enriched in {}76{Ge} was deployed in liquid argon. The analysis of various possible transitions to excited final states is based on coincidence events between pairs of detectors where a de-excitation γ ray is detected in one detector and the two electrons in the other. No signal has been observed and an event counting profile likelihood analysis has been used to determine Frequentist 90% C.L. bounds for three transitions: {0}{{g}.{{s}}.}+-{2}1+: {T}1/22ν \\gt 1.6× {10}23 yr, {0}{{g}.{{s}}.}+-{0}1+: {T}1/22ν \\gt 3.7× {10}23 yr and {0}{{g}.{{s}}.}+-{2}2+: {T}1/22ν \\gt 2.3× {10}23 yr. These bounds are more than two orders of magnitude larger than those reported previously. Bayesian 90% credibility bounds were extracted and used to exclude several models for the {0}{{g}.{{s}}.}+-{0}1+ transition.

  7. Double-beta decay with majoron emission in GERDA Phase I

    Science.gov (United States)

    Hemmer, Sabine

    2015-07-01

    Neutrinoless double-beta decay with emission of one or two majorons (0 νββχ( χ)) is predicted by several beyond-Standard-Model theories. This article reviews the results of a search for 0 νββχ( χ) of 76Ge using data from the Germanium Detector Array (GERDA) experiment, located underground at the INFN Laboratori Nazionali del Gran Sasso (LNGS) in Italy. The analysis comprised data with an exposure of 20.3 kg·yr from the first phase of the experiment. No indication of contributions to the observed energy spectra was detected for any of the majoron models. The lower limit on the half-life for the ordinary majoron model (spectral index n = 1 was determined to be T {1/2/0 νβ } > 4.2 · 1023 yr (90% quantile). This limit and the limits derived for the other majoron modes constitute the most stringent limits on 0 νββχ( χ) decay of 76Ge measured to date.

  8. Monte Carlo studies and optimization for the calibration system of the GERDA experiment

    Science.gov (United States)

    Baudis, L.; Ferella, A. D.; Froborg, F.; Tarka, M.

    2013-11-01

    The GERmanium Detector Array, GERDA, searches for neutrinoless double β decay in 76Ge using bare high-purity germanium detectors submerged in liquid argon. For the calibration of these detectors γ emitting sources have to be lowered from their parking position on the top of the cryostat over more than 5 m down to the germanium crystals. With the help of Monte Carlo simulations, the relevant parameters of the calibration system were determined. It was found that three 228Th sources with an activity of 20 kBq each at two different vertical positions will be necessary to reach sufficient statistics in all detectors in less than 4 h of calibration time. These sources will contribute to the background of the experiment with a total of (1.07±0.04(stat)-0.19+0.13(sys))×10-4 cts/(keV kg yr)) when shielded from below with 6 cm of tantalum in the parking position.

  9. Monte Carlo studies and optimization for the calibration system of the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Baudis, L. [Physics Institute, University of Zurich, Winterthurerstrasse 190, 8057 Zürich (Switzerland); Ferella, A.D. [Physics Institute, University of Zurich, Winterthurerstrasse 190, 8057 Zürich (Switzerland); INFN Laboratori Nazionali del Gran Sasso, 67010 Assergi (Italy); Froborg, F., E-mail: francis@froborg.de [Physics Institute, University of Zurich, Winterthurerstrasse 190, 8057 Zürich (Switzerland); Tarka, M. [Physics Institute, University of Zurich, Winterthurerstrasse 190, 8057 Zürich (Switzerland); Physics Department, University of Illinois, 1110 West Green Street, Urbana, IL 61801 (United States)

    2013-11-21

    The GERmanium Detector Array, GERDA, searches for neutrinoless double β decay in {sup 76}Ge using bare high-purity germanium detectors submerged in liquid argon. For the calibration of these detectors γ emitting sources have to be lowered from their parking position on the top of the cryostat over more than 5 m down to the germanium crystals. With the help of Monte Carlo simulations, the relevant parameters of the calibration system were determined. It was found that three {sup 228}Th sources with an activity of 20 kBq each at two different vertical positions will be necessary to reach sufficient statistics in all detectors in less than 4 h of calibration time. These sources will contribute to the background of the experiment with a total of (1.07±0.04(stat){sub −0.19}{sup +0.13}(sys))×10{sup −4}cts/(keVkgyr)) when shielded from below with 6 cm of tantalum in the parking position.

  10. Improved Limit on Neutrinoless Double-β Decay of ^{76}Ge from GERDA Phase II.

    Science.gov (United States)

    Agostini, M; Bakalyarov, A M; Balata, M; Barabanov, I; Baudis, L; Bauer, C; Bellotti, E; Belogurov, S; Bettini, A; Bezrukov, L; Biernat, J; Bode, T; Borowicz, D; Brudanin, V; Brugnera, R; Caldwell, A; Cattadori, C; Chernogorov, A; Comellato, T; D'Andrea, V; Demidova, E V; Di Marco, N; Domula, A; Doroshkevich, E; Egorov, V; Falkenstein, R; Gangapshev, A; Garfagnini, A; Grabmayr, P; Gurentsov, V; Gusev, K; Hakenmüller, J; Hegai, A; Heisel, M; Hemmer, S; Hiller, R; Hofmann, W; Hult, M; Inzhechik, L V; Janicskó Csáthy, J; Jochum, J; Junker, M; Kazalov, V; Kermaidic, Y; Kihm, T; Kirpichnikov, I V; Kirsch, A; Kish, A; Klimenko, A; Kneißl, R; Knöpfle, K T; Kochetov, O; Kornoukhov, V N; Kuzminov, V V; Laubenstein, M; Lazzaro, A; Lindner, M; Lippi, I; Lubashevskiy, A; Lubsandorzhiev, B; Lutter, G; Macolino, C; Majorovits, B; Maneschg, W; Miloradovic, M; Mingazheva, R; Misiaszek, M; Moseev, P; Nemchenok, I; Panas, K; Pandola, L; Pelczar, K; Pertoldi, L; Pullia, A; Ransom, C; Riboldi, S; Rumyantseva, N; Sada, C; Salamida, F; Schmitt, C; Schneider, B; Schönert, S; Schütz, A-K; Schulz, O; Schwingenheuer, B; Selivanenko, O; Shevchik, E; Shirchenko, M; Simgen, H; Smolnikov, A; Stanco, L; Vanhoefer, L; Vasenko, A A; Veresnikova, A; von Sturm, K; Wagner, V; Wegmann, A; Wester, T; Wiesinger, C; Wojcik, M; Yanovich, E; Zhitnikov, I; Zhukov, S V; Zinatulina, D; Zschocke, A; Zsigmond, A J; Zuber, K; Zuzel, G

    2018-03-30

    The GERDA experiment searches for the lepton-number-violating neutrinoless double-β decay of ^{76}Ge (^{76}Ge→^{76}Se+2e^{-}) operating bare Ge diodes with an enriched ^{76}Ge fraction in liquid argon. The exposure for broad-energy germanium type (BEGe) detectors is increased threefold with respect to our previous data release. The BEGe detectors feature an excellent background suppression from the analysis of the time profile of the detector signals. In the analysis window a background level of 1.0_{-0.4}^{+0.6}×10^{-3}  counts/(keV kg yr) has been achieved; if normalized to the energy resolution this is the lowest ever achieved in any 0νββ experiment. No signal is observed and a new 90% C.L. lower limit for the half-life of 8.0×10^{25}  yr is placed when combining with our previous data. The expected median sensitivity assuming no signal is 5.8×10^{25}  yr.

  11. HEROICA: a test facility for the characterization of BEGe detectors for the Gerda experiment

    Energy Technology Data Exchange (ETDEWEB)

    Falkenstein, Raphael [Eberhard Karls Universitaet Tuebingen (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    The Gerda experiment is designed to search for neutrinoless double beta (0νββ) decay of {sup 76}Ge. It uses bare, enriched Germanium diodes that are operated in liquid argon. Currently, Phase I is running at Laboratori Nazionali del Gran Sasso in Italy. For Phase II, ∝20 kg of Broad Energy Germanium (BEGe) detectors enriched in {sup 76}Ge at 86% level will be additionally deployed. These detectors allow for advanced pulse shape discrimination techniques, to suppress the background, which will be necessary to reach the goal of Phase II with a background index of 10{sup -3} cts/(keV.kg.yr) in the Region of Interest. The HEROICA project aims for acceptance tests and the characterization of the BEGe detectors. In this talk, the infrastructure of the Belgian HADES underground test facility, as well as the full test protocol for the characterization campaign of the enrBEGe detectors, is described. This test protocol includes the determination of important detector parameters, such as energy resolution, depletion voltage, dead-layer thickness and uniformity, active volume, as well as pulse shape discrimination parameters.

  12. Improved Limit on Neutrinoless Double-β Decay of Ge 76 from GERDA Phase II

    Science.gov (United States)

    Agostini, M.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Baudis, L.; Bauer, C.; Bellotti, E.; Belogurov, S.; Bettini, A.; Bezrukov, L.; Biernat, J.; Bode, T.; Borowicz, D.; Brudanin, V.; Brugnera, R.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Comellato, T.; D'Andrea, V.; Demidova, E. V.; di Marco, N.; Domula, A.; Doroshkevich, E.; Egorov, V.; Falkenstein, R.; Gangapshev, A.; Garfagnini, A.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Hakenmüller, J.; Hegai, A.; Heisel, M.; Hemmer, S.; Hiller, R.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kazalov, V.; Kermaidic, Y.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Kish, A.; Klimenko, A.; Kneißl, R.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lindner, M.; Lippi, I.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Majorovits, B.; Maneschg, W.; Miloradovic, M.; Mingazheva, R.; Misiaszek, M.; Moseev, P.; Nemchenok, I.; Panas, K.; Pandola, L.; Pelczar, K.; Pertoldi, L.; Pullia, A.; Ransom, C.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salamida, F.; Schmitt, C.; Schneider, B.; Schönert, S.; Schütz, A.-K.; Schulz, O.; Schwingenheuer, B.; Selivanenko, O.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Vanhoefer, L.; Vasenko, A. A.; Veresnikova, A.; von Sturm, K.; Wagner, V.; Wegmann, A.; Wester, T.; Wiesinger, C.; Wojcik, M.; Yanovich, E.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zschocke, A.; Zsigmond, A. J.; Zuber, K.; Zuzel, G.; Gerda Collaboration

    2018-03-01

    The GERDA experiment searches for the lepton-number-violating neutrinoless double-β decay of Ge 76 (Ge 76 →Se 76 +2 e- ) operating bare Ge diodes with an enriched Ge 76 fraction in liquid argon. The exposure for broad-energy germanium type (BEGe) detectors is increased threefold with respect to our previous data release. The BEGe detectors feature an excellent background suppression from the analysis of the time profile of the detector signals. In the analysis window a background level of 1. 0-0.4+0.6×10-3 counts /(keV kg yr ) has been achieved; if normalized to the energy resolution this is the lowest ever achieved in any 0 νβ β experiment. No signal is observed and a new 90% C.L. lower limit for the half-life of 8.0 ×1025 yr is placed when combining with our previous data. The expected median sensitivity assuming no signal is 5.8 ×1025 yr .

  13. Performance and stability tests of bare high purity germanium detectors in liquid argon for the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Barnabe Heider, Marik

    2009-05-27

    GERDA will search for neutrinoless double beta decay of {sup 76}Ge by using a novel approach of bare germanium detectors in liquid argon (LAr). Enriched germanium detectors from the previous Heidelberg-Moscow and IGEX experiments have been reprocessed and will be deployed in GERDA Phase-I. At the center of this thesis project is the study of the performance of bare germanium detectors in cryogenic liquids. Identical detector performance as in vacuum cryostats (2.2 keV FWHM at 1.3 MeV) was achieved in cryogenic liquids with a new low-mass detector assembly and contacts. One major result is the discovery of a radiation induced leakage current (LC) increase when operating bare detectors with standard passivation layers in LAr. Charge collection and build-up on the passivation layer were identified as the origin of the LC increase. It was found that diodes without passivation do not exhibit this feature. Three month-long stable operation in LAr at {proportional_to} 5 pA LC under periodic gamma irradiation demonstrated the suitability of the modi ed detector design. Based on these results, all Phase-I detectors were reprocessed without passivation layer and subsequently successfully characterized in LAr in the GERDA underground Detector Laboratory. The mass loss during the reprocessing was {proportional_to}300 g out of 17.9 kg and the exposure above ground {proportional_to} 5 days. This results in a negligible cosmogenic background increase of {proportional_to} 5.10{sup -4} cts/(keV.kg.y) at {sup 76}Ge Q{sub {beta}}{sub {beta}} for {sup 60}Co and {sup 68}Ge. (orig.)

  14. Search for the neutrinoless double beta decay (0νββ) of {sup 76}Ge: GERDA Phase II commissioning

    Energy Technology Data Exchange (ETDEWEB)

    Bode, Tobias [Physik-Department E15, Technische Universitaet Muenchen (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    After successful completion of Phase I the Gerda (Germanium Detector Array) experiment underwent a major upgrade of the experimental apparatus. These upgrades include additional 20 kg of custom-made detectors with improved background rejection capabilities, accompanied by improved front-end electronics and an active liquid argon scintillation light veto. A sensitivity on the neutrinoless double beta decay half-life (T{sub 1/2}{sup 0ν}) of 10{sup 26} yr should be reached after a few years of data taking (Phase II). First results of Phase II commissioning and latest results from Phase I analyses are presented in this talk.

  15. Limit on the radiative neutrinoless double electron capture of "3"6Ar from GERDA Phase I

    International Nuclear Information System (INIS)

    Agostini, M.; Balata, M.; D'Andrea, V.; Di Vacri, A.; Junker, M.; Laubenstein, M.; Allardt, M.; Domula, A.; Lehnert, B.; Schneider, B.; Wester, T.; Wilsenach, H.; Zuber, K.; Bakalyarov, A.M.; Belyaev, S.T.; Lebedev, V.I.; Zhukov, S.V.; Barabanov, I.; Bezrukov, L.; Doroshkevich, E.; Fedorova, O.; Gurentsov, V.; Kazalov, V.; Kuzminov, V.V.; Lubsandorzhiev, B.; Moseev, P.; Selivanenko, O.; Veresnikova, A.; Yanovich, E.; Barros, N.; Baudis, L.; Benato, G.; Kish, A.; Miloradovic, M.; Mingazheva, R.; Walter, M.; Bauer, C.; Hakenmueller, J.; Heisel, M.; Heusser, G.; Hofmann, W.; Kihm, T.; Kirsch, A.; Knoepfle, K.T.; Lindner, M.; Maneschg, W.; Salathe, M.; Schreiner, J.; Schwingenheuer, B.; Simgen, H.; Smolnikov, A.; Stepaniuk, M.; Wagner, V.; Wegmann, A.; Bellotti, E.; Belogurov, S.; Kornoukhov, V.N.; Bettini, A.; Brugnera, R.; Garfagnini, A.; Medinaceli, E.; Sada, C.; Sturm, K. von; Bode, T.; Csathy, J.J.; Lazzaro, A.; Schoenert, S.; Wiesinger, C.; Borowicz, D.; Brudanin, V.; Egorov, V.; Kochetov, O.; Nemchenok, I.; Rumyantseva, N.; Zhitnikov, I.; Zinatulina, D.; Caldwell, A.; Gooch, C.; Kneissl, R.; Liao, H.Y.; Majorovits, B.; Palioselitis, D.; Schulz, O.; Vanhoefer, L.; Cattadori, C.; Salamida, F.; Chernogorov, A.; Demidova, E.V.; Kirpichnikov, I.V.; Vasenko, A.A.; Falkenstein, R.; Freund, K.; Grabmayr, P.; Hegai, A.; Jochum, J.; Schmitt, C.; Schuetz, A.K.; Frodyma, N.; Misiaszek, M.; Panas, K.; Pelczar, K.; Wojcik, M.; Zuzel, G.; Gangapshev, A.; Gusev, K.; Hemmer, S.; Lippi, I.; Stanco, L.; Hult, M.; Lutter, G.; Inzhechik, L.V.; Klimenko, A.; Lubashevskiy, A.; Macolino, C.; Pandola, L.; Pullia, A.; Riboldi, S.; Shirchenko, M.

    2016-01-01

    Neutrinoless double electron capture is a process that, if detected, would give evidence of lepton number violation and the Majorana nature of neutrinos. A search for neutrinoless double electron capture of "3"6Ar has been performed with germanium detectors installed in liquid argon using data from Phase I of the GERmanium Detector Array (Gerda) experiment at the Gran Sasso Laboratory of INFN, Italy. No signal was observed and an experimental lower limit on the half-life of the radiative neutrinoless double electron capture of "3"6Ar was established: T_1_/_2 > 3.6 x 10"2"1 years at 90% CI. (orig.)

  16. Status of the GERDA Experiment at the Laboratori Nazionali del Gran Sasso

    Directory of Open Access Journals (Sweden)

    R. Brugnera

    2013-01-01

    Full Text Available The Germanium Detector Array (Gerda is a low background experiment at the Laboratori Nazionali del Gran Sasso (LNGS of the INFN designed to search for the rare neutrinoless double beta decay (0νββ of 76Ge. In its first phase, high purity germanium diodes inherited from the former Heidelberg-Moscow and Igex experiments are operated “bare” and immersed in liquid argon, with an overall background environment of 10−2 cts/(keV·kg·yr, a factor of ten better than its predecessors. Measurements on two-neutrino double beta decay (2νββ giving T1/22ν=(1.88±0.10×1021 yr and recently published background model and pulse shape performances of the detectors are discussed in the paper. A new result on 0νββ has been recently published with a half-life limit on 0νββ decay T1/20ν>2.1×1025 yr (90% C.L.. A second phase of the experiment is scheduled to start during the year 2014, after a major upgrade shutdown. Thanks to the increased detector mass with new designed diodes and to the introduction of liquid argon instrumentation techniques, the experiment aims to reduce further the expected background to about 10−3 cts/(keV·kg·yr and to improve the 0νββ sensitivity to about T1/20ν>1.5×1026 yr (90% C.L..

  17. The background in the 0νββ experiment GERDA

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M.; Bode, T.; Budjas, D.; Csathy, J.J.; Lazzaro, A.; Schoenert, S. [Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Muenchen (Germany); Allardt, M.; Barros, N.; Domula, A.; Lehnert, B.; Wester, T.; Zuber, K. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); Andreotti, E. [Institute for Reference Materials and Measurements, Geel (Belgium); Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Bakalyarov, A.M.; Belyaev, S.T.; Lebedev, V.I.; Zhukov, S.V. [National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Balata, M.; Ioannucci, L.; Junker, M.; Laubenstein, M.; Macolino, C.; Nisi, S.; Pandola, L.; Zavarise, P. [INFN Laboratori Nazionali del Gran Sasso, LNGS, Assergi (Italy); Barabanov, I.; Bezrukov, L.; Gurentsov, V.; Inzhechik, L.V.; Kuzminov, V.V.; Lubsandorzhiev, B.; Yanovich, E. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Barnabe Heider, M. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Muenchen (Germany); Baudis, L.; Benato, G.; Ferella, A.; Guthikonda, K.K.; Tarka, M.; Walter, M. [Physik Institut der Universitaet Zuerich, Zurich (Switzerland); Bauer, C.; Hampel, W.; Heisel, M.; Heusser, G.; Hofmann, W.; Kihm, T.; Kirsch, A.; Knoepfle, K.T.; Lindner, M.; Lubashevskiy, A.; Machado, A.A.; Maneschg, W.; Salathe, M.; Schreiner, J.; Schwingenheuer, B.; Simgen, H.; Smolnikov, A.; Strecker, H.; Wagner, V.; Wegmann, A. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Becerici-Schmidt, N.; Caldwell, A.; Cossavella, F.; Liao, H.Y.; Liu, X.; Majorovits, B.; O' Shaughnessy, C.; Palioselitis, D.; Schulz, O.; Volynets, O. [Max-Planck-Institut fuer Physik, Muenchen (Germany); Bellotti, E.; Pessina, G. [Universita Milano Bicocca, Dipartimento di Fisica, Milan (Italy); INFN Milano Bicocca, Milan (Italy); Belogurov, S.; Kornoukhov, V.N. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Bettini, A.; Brugnera, R.; Garfagnini, A.; Hemmer, S.; Sada, C. [Dipartimento di Fisica e Astronomia dell' Universita di Padova, Padua (Italy); INFN Padova, Padua (Italy); Brudanin, V.; Egorov, V.; Kochetov, O.; Nemchenok, I.; Shevchik, E.; Zhitnikov, I.; Zinatulina, D. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Cattadori, C.; Gotti, C. [INFN Milano Bicocca, Milan (Italy); Chernogorov, A.; Demidova, E.V.; Kirpichnikov, I.V.; Vasenko, A.A. [Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Falkenstein, R.; Freund, K.; Grabmayr, P.; Hegai, A.; Jochum, J.; Schmitt, C. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Frodyma, N.; Pelczar, K.; Wojcik, M.; Zuzel, G. [Jagiellonian University, Institute of Physics, Cracow (Poland); Gangapshev, A. [Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Gusev, K. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Muenchen (Germany); Hult, M.; Lutter, G. [Institute for Reference Materials and Measurements, Geel (Belgium); Klimenko, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max Planck Institut fuer Kernphysik, Heidelberg (Germany); Lippi, I.; Stanco, L.; Ur, C.A. [INFN Padova, Padua (Italy); Pullia, A.; Riboldi, S. [Universita degli Studi di Milano (IT); INFN Milano, Dipartimento di Fisica, Milan (IT); Shirchenko, M. [Joint Institute for Nuclear Research, Dubna (RU); National Research Centre ' ' Kurchatov Institute' ' , Moscow (RU); Sturm, K. von [Dipartimento di Fisica e Astronomia dell' Universita di Padova, Padua (IT); INFN Padova, Padua (IT); Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (DE)

    2014-04-15

    The GERmanium Detector Array (GERDA) experiment at the Gran Sasso underground laboratory (LNGS) of INFN is searching for neutrinoless double beta (0νββ) decay of {sup 76}Ge. The signature of the signal is a monoenergetic peak at 2039 keV, the Q{sub ββ} value of the decay. To avoid bias in the signal search, the present analysis does not consider all those events, that fall in a 40 keV wide region centered around Q{sub ββ}. The main parameters needed for the 0νββ analysis are described. A background model was developed to describe the observed energy spectrum. The model contains several contributions, that are expected on the basis of material screening or that are established by the observation of characteristic structures in the energy spectrum. The model predicts a flat energy spectrum for the blinding window around Q{sub ββ} with a background index ranging from 17.6 to 23.8 x 10{sup -3} cts/(keV kg yr). A part of the data not considered before has been used to test if the predictions of the background model are consistent. The observed number of events in this energy region is consistent with the background model. The background at Q{sub ββ} is dominated by close sources,mainly due to {sup 42}K, {sup 214}Bi, {sup 228}Th, {sup 60}Co and α emitting isotopes from the {sup 226}Ra decay chain. The individual fractions depend on the assumed locations of the contaminants. It is shown, that after removal of the known γ peaks, the energy spectrum can be fitted in an energy range of 200 keV around Q{sub ββ} with a constant background. This gives a background index consistent with the full model and uncertainties of the same size. (orig.)

  18. Background reduction at low energies with BEGe detector operated in liquid argon using the GERDA-LArGe facility

    Energy Technology Data Exchange (ETDEWEB)

    Budjas, Dusan [Physik-Department E15, Technische Universitaet Muenchen (Germany); Collaboration: GERDA-Collaboration

    2014-07-01

    LArGe is a low background test facility used for proving innovative approaches to background reduction in support of the neutrinoless double beta decay experiment Gerda. These approaches include an anti-Compton veto using scintillation light detection from liquid argon, as well as a novel pulse shape discrimination method exploiting the characteristic electrical field distribution inside BEGe detectors. The latter technique can identify single-site events (typical for double beta decays) and efficiently reject multi-site events (typical for backgrounds from gamma-ray interactions), as well as different types of background events from detector surfaces. While the main focus of the LArGe facility is to assist with reaching the goal of Gerda - improving the sensitivity for {sup 76}Ge neutrinoless double beta decay search, reducing the background at low energies and lowering the energy threshold is also of interest. In particular such efforts can be potentially relevant for search of dark matter or low energy neutrino interactions. In this talk I present the experimental measurement of the low energy region with a BEGe detector operated in LArGe with the application of powerful background suppression methods. The performance will be compared to that of some dedicated dark matter detection experiments.

  19. Water physics and chemistry data from bottle casts from the GERDA as part of the Rosenstiel School of Marine and Atmospheric Science (RSMAS) project from 20 July 1955 to 29 May 1957 (NODC Accession 7000057)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Water physics and chemistry data were collected from bottle casts from the GERDA from 20 July 1955 to 29 May 1957. Data were collected as part of the Rosenstiel...

  20. Background suppression in Gerda Phase II and its study in the LArGe low background set-up

    Energy Technology Data Exchange (ETDEWEB)

    Budjas, Dusan [Physik-Department E15, Technische Universitaet Muenchen (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    In Phase II of the Gerda experiment additional ∝20 kg of BEGe-type germanium detectors, enriched in {sup 76}Ge, will be deployed in liquid argon (LAr) to further increase the sensitivity for the half-life of neutrinoless double beta (0νββ) decay of {sup 76}Ge to > 2 . 10{sup 26} yr. To reduce background by a factor of 10 to the required level of < 10{sup -3} cts/(keV.kg.yr), it is necessary to employ active background-suppression techniques, including anti-Compton veto using scintillation light detection from LAr and pulse shape discrimination exploiting the characteristic electrical field distribution inside BEGe detectors. The latter technique can identify single-site events (typical for 0νββ) and efficiently reject multi-site events (mainly from γ-rays), as well as different types of background events from detector surfaces. The combined power of these techniques was studied for {sup 42}K and other background sources at the low background facility LArGe. Together with extensive simulations, the information from tracking of the Phase II detector material exposure to cosmic rays and based on the background contributions observed in Phase I, the expected background level in Phase II in the region of interest at 2039 keV, the Q{sub ββ} energy of {sup 76}Ge, is estimated. The preliminary analysis shows that contributions from all expected background components after all cuts are in line with the goal of Gerda Phase II.

  1. Excited state transitions in 2νββ decays of {sup 76}Ge from phase I of the GERDA experiment

    Energy Technology Data Exchange (ETDEWEB)

    Wester, Thomas [IKTP, TU Dresden (Germany); Collaboration: GERDA-Collaboration

    2015-07-01

    The Germanium Detector Array GERDA is an experiment searching for the neutrinoless double beta decay in {sup 76}Ge. The observation of such a decay would prove the Majorana character of the neutrino and could provide a hint about the neutrino mass and possibly identify the mass hierarchy scheme. The half life of the neutrino accompanied double beta decay (2νββ) of {sup 76}Ge has been measured by GERDA Phase I with unprecedented precision. The observed spectrum comes mostly from the transition from the 0{sup +} ground state of {sup 76}Ge to the 0{sup +} ground state of {sup 76}Se. However, phase space suppressed 2νββ transitions to excited states of {sup 76}Se exist as well. At current state, the predicted half lives for such decays vary by several orders of magnitude, due to the large uncertainties in the nuclear matrix elements and the available nuclear models. An observation would therefore help to constrain model parameters and decrease those uncertainties. This study investigates the 2νββ decay of {sup 76}Ge into various excited states of {sup 76}Se using the data from GERDA Phase I. An event counting method is performed based on coincident events between two germanium detectors. Several analysis parameters are optimized with the help of Monte Carlo simulations to maximize the sensitivity. The presentation discusses the procedure and results of this analysis.

  2. Phytotoxicology section investigation in the vicinity of Riddell Hanna No. 1 oil well, Lot 11, Conc 13, Chatham Twp., Kent County, 1990

    International Nuclear Information System (INIS)

    1992-02-01

    A survey was conducted around the Riddell Hanna No.1 oil well in the Windsor district of Ontario to determine the degree and extent of damage that may have been caused to a farm field in the vicinity of the well. The well has been operating for decades, and occasionally has been purged by pumping out brine. In the past (possibly up to ten years ago) the brine was not contained but was deposited directly onto the field adjacent the well. Large patches of bare soil were evident in the soybean field immediately south of the well. Effects of the contaminant on the soybeans were clearly evident in all adjacent areas up to 3 m from the bare patches. Soil and vegetation samples were collected from affected areas and a control site. Results of analyses of electrical conductivity and sodium and chloride concentrations in soils in the vicinity of the well are presented. In the affected area, conductivity reaches six times the level expected to cause severe damage to most plants. Both Na and Cl concentrations in the plants were higher in the affected area than in the control area. The total affected area was estimated at 7,600 m 2 , of which 4,000 m 2 does not support any plant life. 3 refs., 2 figs

  3. Outbreak of contact sensitization to methylisothiazolinone: an analysis of French data from the REVIDAL-GERDA network.

    Science.gov (United States)

    Hosteing, Stéphanie; Meyer, Nicolas; Waton, Julie; Barbaud, Annick; Bourrain, Jean-Luc; Raison-Peyron, Nadia; Felix, Brigitte; Milpied-Homsi, Brigitte; Ferrier Le Bouedec, Marie-Christine; Castelain, Michel; Vital-Durand, Dominique; Debons, Michèle; Collet, Evelyne; Avenel-Audran, Martine; Mathelier-Fusade, Pascale; Vermeulen, Christophe; Assier, Haudrey; Gener, Gwendoline; Lartigau-Sezary, Isabelle; Catelain-Lamy, Amandine; Giordano-Labadie, Françoise

    2014-05-01

    The preservative methylisothiazolinone (MI) is used in combination with methylchloroisothiazolinone (MCI), but the MCI/MI mixture has been identified as highly allergenic. MI is considered to be less allergenic, and since the mid-2000s has been widely used alone, but is now clearly identified as a contact allergen. The French Vigilance Network for Dermatology and Allergy of the Study and Research Group on Contact Dermatitis (REVIDAL-GERDA) added MI to its baseline patch testing series in 2010. To evaluate the change in the proportion of MI-positive tests in France between 2010 and 2012. We conducted a nationwide, multicentre, retrospective study of all MI-tested patients between 2010 and 2012. Sixteen centres participated in the study (7874 patients were tested). Patch tests were performed mainly at a concentration of MI 200 ppm aq. We observed a significant increase in the proportion of MI-positive tests in 2012 and 2011 as compared with 2010 (5.6%, 3.3%, and 1.5%, respectively; p < 0.001). We report a significant increase in the number of MI-positive tests. MI is confirmed to be a rapidly emerging allergen, as also observed in other European countries. © 2014 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

  4. Results on neutrinoless double-β decay of 76Ge from phase I of the GERDA experiment.

    Science.gov (United States)

    Agostini, M; Allardt, M; Andreotti, E; Bakalyarov, A M; Balata, M; Barabanov, I; Barnabé Heider, M; Barros, N; Baudis, L; Bauer, C; Becerici-Schmidt, N; Bellotti, E; Belogurov, S; Belyaev, S T; Benato, G; Bettini, A; Bezrukov, L; Bode, T; Brudanin, V; Brugnera, R; Budjáš, D; Caldwell, A; Cattadori, C; Chernogorov, A; Cossavella, F; Demidova, E V; Domula, A; Egorov, V; Falkenstein, R; Ferella, A; Freund, K; Frodyma, N; Gangapshev, A; Garfagnini, A; Gotti, C; Grabmayr, P; Gurentsov, V; Gusev, K; Guthikonda, K K; Hampel, W; Hegai, A; Heisel, M; Hemmer, S; Heusser, G; Hofmann, W; Hult, M; Inzhechik, L V; Ioannucci, L; Janicskó Csáthy, J; Jochum, J; Junker, M; Kihm, T; Kirpichnikov, I V; Kirsch, A; Klimenko, A; Knöpfle, K T; Kochetov, O; Kornoukhov, V N; Kuzminov, V V; Laubenstein, M; Lazzaro, A; Lebedev, V I; Lehnert, B; Liao, H Y; Lindner, M; Lippi, I; Liu, X; Lubashevskiy, A; Lubsandorzhiev, B; Lutter, G; Macolino, C; Machado, A A; Majorovits, B; Maneschg, W; Misiaszek, M; Nemchenok, I; Nisi, S; O'Shaughnessy, C; Pandola, L; Pelczar, K; Pessina, G; Pullia, A; Riboldi, S; Rumyantseva, N; Sada, C; Salathe, M; Schmitt, C; Schreiner, J; Schulz, O; Schwingenheuer, B; Schönert, S; Shevchik, E; Shirchenko, M; Simgen, H; Smolnikov, A; Stanco, L; Strecker, H; Tarka, M; Ur, C A; Vasenko, A A; Volynets, O; von Sturm, K; Wagner, V; Walter, M; Wegmann, A; Wester, T; Wojcik, M; Yanovich, E; Zavarise, P; Zhitnikov, I; Zhukov, S V; Zinatulina, D; Zuber, K; Zuzel, G

    2013-09-20

    Neutrinoless double beta decay is a process that violates lepton number conservation. It is predicted to occur in extensions of the standard model of particle physics. This Letter reports the results from phase I of the Germanium Detector Array (GERDA) experiment at the Gran Sasso Laboratory (Italy) searching for neutrinoless double beta decay of the isotope (76)Ge. Data considered in the present analysis have been collected between November 2011 and May 2013 with a total exposure of 21.6 kg yr. A blind analysis is performed. The background index is about 1 × 10(-2) counts/(keV kg yr) after pulse shape discrimination. No signal is observed and a lower limit is derived for the half-life of neutrinoless double beta decay of (76)Ge, T(1/2)(0ν) >2.1 × 10(25) yr (90% C.L.). The combination with the results from the previous experiments with (76)Ge yields T(1/2)(0ν)>3.0 × 10(25) yr (90% C.L.).

  5. Results on Neutrinoless Double-β Decay of Ge76 from Phase I of the GERDA Experiment

    Science.gov (United States)

    Agostini, M.; Allardt, M.; Andreotti, E.; Bakalyarov, A. M.; Balata, M.; Barabanov, I.; Barnabé Heider, M.; Barros, N.; Baudis, L.; Bauer, C.; Becerici-Schmidt, N.; Bellotti, E.; Belogurov, S.; Belyaev, S. T.; Benato, G.; Bettini, A.; Bezrukov, L.; Bode, T.; Brudanin, V.; Brugnera, R.; Budjáš, D.; Caldwell, A.; Cattadori, C.; Chernogorov, A.; Cossavella, F.; Demidova, E. V.; Domula, A.; Egorov, V.; Falkenstein, R.; Ferella, A.; Freund, K.; Frodyma, N.; Gangapshev, A.; Garfagnini, A.; Gotti, C.; Grabmayr, P.; Gurentsov, V.; Gusev, K.; Guthikonda, K. K.; Hampel, W.; Hegai, A.; Heisel, M.; Hemmer, S.; Heusser, G.; Hofmann, W.; Hult, M.; Inzhechik, L. V.; Ioannucci, L.; Janicskó Csáthy, J.; Jochum, J.; Junker, M.; Kihm, T.; Kirpichnikov, I. V.; Kirsch, A.; Klimenko, A.; Knöpfle, K. T.; Kochetov, O.; Kornoukhov, V. N.; Kuzminov, V. V.; Laubenstein, M.; Lazzaro, A.; Lebedev, V. I.; Lehnert, B.; Liao, H. Y.; Lindner, M.; Lippi, I.; Liu, X.; Lubashevskiy, A.; Lubsandorzhiev, B.; Lutter, G.; Macolino, C.; Machado, A. A.; Majorovits, B.; Maneschg, W.; Misiaszek, M.; Nemchenok, I.; Nisi, S.; O'Shaughnessy, C.; Pandola, L.; Pelczar, K.; Pessina, G.; Pullia, A.; Riboldi, S.; Rumyantseva, N.; Sada, C.; Salathe, M.; Schmitt, C.; Schreiner, J.; Schulz, O.; Schwingenheuer, B.; Schönert, S.; Shevchik, E.; Shirchenko, M.; Simgen, H.; Smolnikov, A.; Stanco, L.; Strecker, H.; Tarka, M.; Ur, C. A.; Vasenko, A. A.; Volynets, O.; von Sturm, K.; Wagner, V.; Walter, M.; Wegmann, A.; Wester, T.; Wojcik, M.; Yanovich, E.; Zavarise, P.; Zhitnikov, I.; Zhukov, S. V.; Zinatulina, D.; Zuber, K.; Zuzel, G.

    2013-09-01

    Neutrinoless double beta decay is a process that violates lepton number conservation. It is predicted to occur in extensions of the standard model of particle physics. This Letter reports the results from phase I of the Germanium Detector Array (GERDA) experiment at the Gran Sasso Laboratory (Italy) searching for neutrinoless double beta decay of the isotope Ge76. Data considered in the present analysis have been collected between November 2011 and May 2013 with a total exposure of 21.6 kg yr. A blind analysis is performed. The background index is about 1×10-2counts/(keVkgyr) after pulse shape discrimination. No signal is observed and a lower limit is derived for the half-life of neutrinoless double beta decay of Ge76, T1/20ν>2.1×1025yr (90% C.L.). The combination with the results from the previous experiments with Ge76 yields T1/20ν>3.0×1025yr (90% C.L.).

  6. Search for 2νββ excited state transitions and HPGe characterization for surface events in GERDA phase II

    Energy Technology Data Exchange (ETDEWEB)

    Lehnert, Bjoern

    2016-03-01

    The search for the neutrinoless double beta (0νββ) decay is one of the most active fields in modern particle physics. This process is not allowed within the Standard Model and its observation would imply lepton number violation and would lead to the Majorana nature of neutrinos. The experimentally observed quantity is the half-life of the decay, which can be connected to the effective Majorana neutrino mass via nuclear matrix elements. The latter can only be determined theoretically and are currently affected by large uncertainties. To reduce these uncertainties one can investigate the well established two-neutrino double beta (2νββ) decay into the ground and excited states of the daughter isotope. These similar processes are allowed within the Standard Model. In this dissertation, the search for 2νββ decays into excited states is performed in {sup 110}Pd, {sup 102}Pd and {sup 76}Ge. Three gamma spectroscopy setups at the Felsenkeller (Germany), HADES (Belgium) and LNGS (Italy) underground laboratories are used to search for the transitions in {sup 110}Pd and {sup 102}Pd. No signal is observed leading to lower half-live bounds (90% C.I.) of 2.9 . 10{sup 20} yr, 3.9 . 10{sup 20} yr and 2.9 . 10{sup 20} yr for the 0/2νββ 2{sup +}{sub 1}, 0{sup +}{sub 1} and 2{sup +}{sub 2} transitions in {sup 110}Pd and 7.9 . 10{sup 18} yr, 9.2 . 10{sup 18} yr and 1.5 . 10{sup 19} yr for the 0/2νββ 2{sup +}{sub 1}, 0{sup +}{sub 1} and 2{sup +}{sub 2} transitions in {sup 102}Pd, respectively. This is a factor of 1.3 to 3 improvement compared to previous limits. The data of Phase I (Nov 2011 - May 2013) of the 0νββ decay experiment GERDA at LNGS is used to search for excited state transitions in {sup 76}Ge. The analysis is based on coincidences between two detectors and finds no signal. Lower half-life limits (90 % C.L.) of 1.6.10{sup 23} yr, 3.7.10{sup 23} yr and 2.3.10{sup 23} yr are obtained for the 2νββ 2{sup +}{sub 1}, 0{sup +}{sub 1} and 2{sup +}{sub 2

  7. Review: Hanna Meißner (2010. Jenseits des autonomen Subjekts. Zur gesellschaftlichen Konstitution von Handlungsfähigkeit [Beyond Human Autonomy. The Social Constitution of Agency Based on Butler, Foucault and Marx

    Directory of Open Access Journals (Sweden)

    Lisa Pfahl

    2012-03-01

    Full Text Available Based on the theories of Judith BUTLER, Michel FOUCAULT, and Karl MARX, Hanna MEIßNER analyzes the historical, legal and social conditions of the emergence of subjectivity. She establishes a critical understanding of human autonomy and the potential of practices of resistance in the context of existing conditions. Both MEIßNER's analytical structure and her precise argumentation are convincing. By highlighting the relationship of individual self-determination and collective welfare, this study provides helpful links to different theoretical approaches, particularly to the emerging disciplines of disability studies and diversity studies in Germany. URN: http://nbn-resolving.de/urn:nbn:de:0114-fqs1202181

  8. The Interpretation of Hanna' Image in "The Unicorn"from the Perspective of Theory of Personality Structure%从人格结构理论解读《独角兽》中汉娜的形象

    Institute of Scientific and Technical Information of China (English)

    2013-01-01

    "The Unicorn" is a gothic romance novel created in 1963 by Iris Murdoch. The novel dialyzes the heroine Hanna's complex mental activities in the third person narrative perspec-tive. Based on the theory of personality structure, this paper at-tempts to analyzes Hanna's image from several aspects.%  《独角兽》是英国小说家兼哲学家艾丽丝·默多克创作于1963年的一部哥特式爱情小说。小说以第三人称叙述视角透析主人公汉娜的复杂心理活动。本文试图基于弗洛伊德的人格结构理论,从本我、自我与超我之间的相互作用和相互抵抗,分析汉娜在盖兹囚禁岁月的隐忍和抗争的心路历程。

  9. Search for the neutrinoless double β-decay in GERDA phase I using a pulse shape discrimination technique

    International Nuclear Information System (INIS)

    Kirsch, Andrea

    2014-01-01

    The Germanium Detector Array (Gerda) experiment, located underground at the INFN Laboratori Nazionali del Gran Sasso (LNGS) in Italy, deploys high-purity germanium detectors to search for the neutrinoless double β-decay (0νββ) of 76 Ge. An observation of this lepton number violating process, which is expected by many extensions of the Standard Model, would not only generate a fundamental shift in our understanding of particle physics, but also unambiguously prove the neutrino to have a non-vanishing Majorana mass component. A first phase of data recording lasted from November 2011 to May 2013 - resulting in a total exposure (defined as the product of detector mass and measurement time) of 21.6 kg.yr. Within this thesis a thorough study of this data with special emphasis on the development and scrutiny of an active background suppression technique by means of a signal shape analysis has been performed. Among several investigated multivariate approaches, particularly a selection algorithm based on an artificial neural network is found to yield the best performance; i.a. the background index close to the Q-value of the 0νββ-decay could be suppressed by 45% to 1.10 -2 cts/(keV.kg.yr), while still retaining a considerably high signal survival fraction of (83±3)% leading to a significant improvement of the experimental sensitivity. The efficiency is derived by a simulation and further validated by substantiated consistency checks availing themselves of measurements taken with different calibration sources and physics data. No signal is observed and a new lower limit of T 0ν 1/2 (90%C.L.)> 2.2. 10 25 yr for the half-life of neutrinoless double β-decay of 76 Ge is established.

  10. Search for the neutrinoless double β-decay in GERDA phase I using a pulse shape discrimination technique

    Energy Technology Data Exchange (ETDEWEB)

    Kirsch, Andrea

    2014-07-09

    The Germanium Detector Array (Gerda) experiment, located underground at the INFN Laboratori Nazionali del Gran Sasso (LNGS) in Italy, deploys high-purity germanium detectors to search for the neutrinoless double β-decay (0νββ) of {sup 76}Ge. An observation of this lepton number violating process, which is expected by many extensions of the Standard Model, would not only generate a fundamental shift in our understanding of particle physics, but also unambiguously prove the neutrino to have a non-vanishing Majorana mass component. A first phase of data recording lasted from November 2011 to May 2013 - resulting in a total exposure (defined as the product of detector mass and measurement time) of 21.6 kg.yr. Within this thesis a thorough study of this data with special emphasis on the development and scrutiny of an active background suppression technique by means of a signal shape analysis has been performed. Among several investigated multivariate approaches, particularly a selection algorithm based on an artificial neural network is found to yield the best performance; i.a. the background index close to the Q-value of the 0νββ-decay could be suppressed by 45% to 1.10{sup -2} cts/(keV.kg.yr), while still retaining a considerably high signal survival fraction of (83±3)% leading to a significant improvement of the experimental sensitivity. The efficiency is derived by a simulation and further validated by substantiated consistency checks availing themselves of measurements taken with different calibration sources and physics data. No signal is observed and a new lower limit of T{sup 0ν}{sub 1/2} (90%C.L.)> 2.2. 10{sup 25} yr for the half-life of neutrinoless double β-decay of {sup 76}Ge is established.

  11. Oceanographic and meteorological data measurements collected from CTD, bottle and other instruments from Gerda, J.E., Pillsbury and Calanus in the North Atlantic Ocean and Gulf of Mexico from 1967-02-24 to 1970-11-13 (NCEI Accession 7100821)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Oceanographic and meteorological data measurements collected from CTD, bottle and other instruments. Data were collected from Gerda, J.E., Pillsbury and Calanus in...

  12. Pulse shape analysis for the GERDA experiment to set a new limit on the half-life of 0νββ decay of {sup 76}Ge

    Energy Technology Data Exchange (ETDEWEB)

    Wagner, Victoria Elisabeth

    2017-01-25

    The GERDA experiment searches for neutrinoless double beta (0νββ) decay of {sup 76}Ge using high purity germanium (HPGe) detectors operated in liquid argon (LAr). The aim is to explore half-lives of the order of 10{sup 26} yr. Therefore, GERDA relies on improved active background reduction techniques such as pulse shape discrimination (PSD) in which the time structure of the germanium signals is analyzed to discriminate signal- from background-like events. Two types of HPGe detectors are operated: semi-coaxial detectors previously used in the Heidelberg-Moscow and IGEX experiments and new Broad Energy Germanium (BEGe) detectors which feature an improved energy resolution and enhanced PSD. In Phase I of the experiment, five enriched BEGe detectors were used for the first time in the search for 0νββ decay. A PSD based on a single parameter, the ratio of the maximum current amplitude over the energy A/E is applied. 83% of the background events in a 232 keV region around Q{sub ββ} are rejected with a high signal efficiency of (92.1 ± 1.9) %. The achieved background index (BI) is (5.4{sup +4.1}{sub -3.4}) . 10{sup -3} (counts)/(keV.kg.yr). This is an improvement by a factor of 10 compared to previous germanium based 0νββ experiments. Phase II of the experiment includes a major upgrade: for further background rejection, the LAr cryostat is instrumented to detect argon scintillation light. Additional 25 BEGe detectors are installed. After PSD and LAr veto a BI of (0.7{sup +1.3}{sub -0.5}) . 10{sup -3} (counts)/(keV.kg.yr) is achieved. This is the best BI achieved in 0νββ experiments so far. A frequentist statistical analysis is performed on the combined data collected in GERDA Phase I and the first Phase II release. A new limit on the half-life of 0νββ decay of {sup 76}Ge is set to T{sup 0ν}{sub 1/2}>5.3.10{sup 25} yr at 90% C.L., with a median sensitivity of T{sup 0ν}{sub 1/2}>4.0.10{sup 25} yr at 90% C.L.

  13. Results on ββ decay with emission of two neutrinos or Majorons in {sup 76}Ge from GERDA Phase I

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M.; Bode, T.; Budjas, D.; Csathy, J.J.; Lazzaro, A.; Schoenert, S. [Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Allardt, M.; Domula, A.; Lehnert, B.; Schneider, B.; Wester, T.; Wilsenach, H.; Zuber, K. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); Bakalyarov, A.M.; Belyaev, S.T.; Lebedev, V.I.; Zhukov, S.V. [National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Balata, M.; D' Andrea, V.; Di Vacri, A.; Junker, M.; Laubenstein, M.; Macolino, C.; Zavarise, P. [INFN Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, Assergi (Italy); Barabanov, I.; Bezrukov, L.; Doroshkevich, E.; Fedorova, O.; Gurentsov, V.; Kazalov, V.; Kuzminov, V.V.; Lubsandorzhiev, B.; Moseev, P.; Selivanenko, O.; Veresnikova, A.; Yanovich, E. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Barros, N. [Technische Universitaet Dresden, Institut fuer Kern- und Teilchenphysik, Dresden (Germany); University of Pennsylvania, Department of Physics and Astronomy, Philadelphia, PA (United States); Baudis, L.; Benato, G.; Walter, M. [Physik Institut der Universitaet Zuerich, Zurich (Switzerland); Bauer, C.; Heisel, M.; Heusser, G.; Hofmann, W.; Kihm, T.; Kirsch, A.; Knoepfle, K.T.; Lindner, M.; Maneschg, W.; Salathe, M.; Schreiner, J.; Schwingenheuer, B.; Simgen, H.; Smolnikov, A.; Stepaniuk, M.; Wagner, V.; Wegmann, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Becerici-Schmidt, N.; Caldwell, A.; Liao, H.Y.; Majorovits, B.; Palioselitis, D.; Schulz, O.; Vanhoefer, L. [Max-Planck-Institut fuer Physik, Munich (Germany); Bellotti, E. [Universita Milano Bicocca, Dipartimento di Fisica, Milan (Italy); INFN Milano Bicocca, Milan (Italy); Belogurov, S.; Kornoukhov, V.N. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Bettini, A.; Brugnera, R.; Garfagnini, A.; Hemmer, S.; Medinaceli, E.; Sada, C.; Sturm, K. von [Dipartimento di Fisica e Astronomia dell' Universita di Padova, Padua (Italy); INFN Padova, Padua (Italy); Borowicz, D. [Jagiellonian University, Institute of Physics, Cracow (Poland); Joint Institute for Nuclear Research, Dubna (Russian Federation); Brudanin, V.; Egorov, V.; Kochetov, O.; Nemchenok, I.; Rumyantseva, N.; Zhitnikov, I.; Zinatulina, D. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Cattadori, C. [INFN Milano Bicocca, Milan (Italy); Chernogorov, A.; Demidova, E.V.; Kirpichnikov, I.V.; Vasenko, A.A. [Institute for Theoretical and Experimental Physics, Moscow (Russian Federation); Falkenstein, R.; Freund, K.; Grabmayr, P.; Hegai, A.; Jochum, J.; Schmitt, C.; Schuetz, A.K. [Eberhard Karls Universitaet Tuebingen, Physikalisches Institut, Tuebingen (Germany); Frodyma, N.; Misiaszek, M.; Panas, K.; Pelczar, K.; Wojcik, M.; Zuzel, G. [Jagiellonian University, Institute of Physics, Cracow (Poland); Gangapshev, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Gusev, K. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Technische Universitaet Muenchen, Physik Department and Excellence Cluster Universe, Munich (Germany); Hult, M.; Lutter, G. [Institute for Reference Materials and Measurements, Geel (Belgium); Inzhechik, L.V. [Institute for Nuclear Research of the Russian Academy of Sciences, Moscow (Russian Federation); Moscow Institute of Physics and Technology, Moscow (Russian Federation); Klimenko, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); International University for Nature, Society and Man ' ' Dubna' ' , Dubna (Russian Federation); Lippi, I.; Stanco, L.; Ur, C.A. [INFN Padova, Padua (Italy); Lubashevskiy, A. [Joint Institute for Nuclear Research, Dubna (Russian Federation); Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Pandola, L. [INFN Laboratori Nazionali del Sud, Catania (Italy); Pullia, A.; Riboldi, S. [Universita degli Studi di Milano, Dipartimento di Fisica, Milan (Italy); INFN, Milano (Italy); Shirchenko, M. [Joint Institute for Nuclear Research, Dubna (Russian Federation); National Research Centre ' ' Kurchatov Institute' ' , Moscow (Russian Federation); Collaboration: GERDA Collaboration

    2015-09-15

    A search for neutrinoless ββ decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Processes with spectral indices n = 1, 2, 3, 7 were searched for. No signals were found and lower limits of the order of 10{sup 23} yr on their half-lives were derived, yielding substantially improved results compared to previous experiments with {sup 76}Ge. A new result for the half-life of the neutrino-accompanied ββ decay of {sup 76}Ge with significantly reduced uncertainties is also given, resulting in T{sub 1/2}{sup 2ν} = (1.926 ± 0.094) @ x 10{sup 21} yr. (orig.)

  14. Results on ββ decay with emission of two neutrinos or Majorons in {sup 76}Ge from GERDA Phase I

    Energy Technology Data Exchange (ETDEWEB)

    Agostini, M. [Physik Department and Excellence Cluster Universe, Technische Universität München, Munich (Germany); Allardt, M. [Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden (Germany); Bakalyarov, A. M. [National Research Centre “Kurchatov Institute”, Moscow (Russian Federation); Balata, M. [INFN Laboratori Nazionali del Gran Sasso and Gran Sasso Science Institute, Assergi (Italy); Collaboration: GERDA Collaboration; and others

    2015-09-09

    A search for neutrinoless ββ decay processes accompanied with Majoron emission has been performed using data collected during Phase I of the GERmanium Detector Array (GERDA) experiment at the Laboratori Nazionali del Gran Sasso of INFN (Italy). Processes with spectral indices n=1,2,3,7 were searched for. No signals were found and lower limits of the order of 10{sup 23} yr on their half-lives were derived, yielding substantially improved results compared to previous experiments with {sup 76}Ge. A new result for the half-life of the neutrino-accompanied ββ decay of {sup 76}Ge with significantly reduced uncertainties is also given, resulting in T{sub 1/2}{sup 2ν}=(1.926±0.094)×10{sup 21} yr.

  15. Systolic blood pressure decline in very old individuals is explained by deteriorating health: Longitudinal changes from Umeå85+/GERDA.

    Science.gov (United States)

    Weidung, Bodil; Toots, Annika; Nordström, Peter; Carlberg, Bo; Gustafson, Yngve

    2017-12-01

    Declining systolic blood pressure (SBP) is common in very old age and is associated with adverse events, such as dementia. Knowledge of factors associated with SBP changes could explain the etiology of this decline in SBP. This study investigated longitudinal changes in socioeconomic factors, medical conditions, drug prescriptions, and assessments and their associations with SBP changes among very old followed individuals.The study was based on data from the Umeå85+/Gerontological Regional Database (GERDA) cohort study, which provided cross-sectional and longitudinal data on participants aged 85, 90, and ≥95 years from 2000 to 2015. Follow-up assessments were conducted after 5 years. The main outcome was a change in SBP. Factors associated with SBP changes were assessed using multivariate linear regression models.In the Umeå85+/GERDA study, 454 surviving individuals underwent follow-up assessment after 5 years. Of these, 297 had SBP measured at baseline and follow-up. The mean change ± standard deviation in SBP was -12 ± 25 mm Hg. SBP decline was associated independently with later investigation year (P = .009), higher baseline SBP (P < .001), baseline antidepressant prescription (P = .011), incident acute myocardial infarction during follow-up (P = .003), new diuretic prescription during follow-up (P = .044), and a decline in the Barthel Activities of Daily Living index at follow-up (P < .001).In conclusion, SBP declines among very old individuals. This decline seems to be associated with initial SBP level, investigation year, and health-related factors. Copyright © 2017 The Authors. Published by Wolters Kluwer Health, Inc. All rights reserved.

  16. Risk analysis and reliability of the GERDA Experiment extraction and ventilation plant at Gran Sasso mountain underground laboratory of Italian National Institute for Nuclear Physics

    International Nuclear Information System (INIS)

    Lombardi, Mara; Garzia, Fabio; Guarascio, Massimo; Giovannone, Enzo Paolo; Giampaoli, Antonio; Musti, Mafalda; Ranalli, Maria Teresa; Perruzza, Roberto; Tartaglia, Roberto

    2017-01-01

    The aim of this study is the risk analysis evaluation about argon release from the GERDA experiment in the Gran Sasso underground National Laboratories (LNGS) of the Italian National Institute for Nuclear Physics (INFN). The GERDA apparatus, located in Hall A of the LNGS, is a facility with germanium detectors located in a wide tank filled with about 70 m"3 of cold liquefied argon. This cryo-tank sits in another water-filled tank (700 m"3 ) at atmospheric pressure. In such cryogenic processes, the main cause of an accidental scenario is lacking insulation of the cryo-tank. A preliminary HazOp analysis has been carried out on the whole system. The risk assessment identified two possible top-events: explosion due to a Rapid Phase Transition - RPT and argon runaway evaporation. Risk analysis highlighted a higher probability of occurrence of the latter top event. To avoid emission in Hall A, the HazOp, Fault Tree and Event tree analyses of the cryogenic gas extraction and ventilation plant have been made. The failures related to the ventilation system are the main cause responsible for the occurrence. To improve the system reliability some corrective actions were proposed: the use of UPS and the upgrade of damper opening devices. Furthermore, the Human Reliability Analysis identified some operating and management improvements: action procedure optimization, alert warnings and staff training. The proposed model integrates the existing analysis techniques by applying the results to an atypical work environment and there are useful suggestions for improving the system reliability. (author)

  17. Risk analysis and reliability of the GERDA Experiment extraction and ventilation plant at Gran Sasso mountain underground laboratory of Italian National Institute for Nuclear Physics

    Directory of Open Access Journals (Sweden)

    Mara Lombardi

    Full Text Available Abstract The aim of this study is the risk analysis evaluation about argon release from the GERDA experiment in the Gran Sasso underground National Laboratories (LNGS of the Italian National Institute for Nuclear Physics (INFN. The GERDA apparatus, located in Hall A of the LNGS, is a facility with germanium detectors located in a wide tank filled with about 70 m3 of cold liquefied argon. This cryo-tank sits in another water-filled tank (700 m3 at atmospheric pressure. In such cryogenic processes, the main cause of an accidental scenario is lacking insulation of the cryo-tank. A preliminary HazOp analysis has been carried out on the whole system. The risk assessment identified two possible top-events: explosion due to a Rapid Phase Transition - RPT and argon runaway evaporation. Risk analysis highlighted a higher probability of occurrence of the latter top event. To avoid emission in Hall A, the HazOp, Fault Tree and Event tree analyses of the cryogenic gas extraction and ventilation plant have been made. The failures related to the ventilation system are the main cause responsible for the occurrence. To improve the system reliability some corrective actions were proposed: the use of UPS and the upgrade of damper opening devices. Furthermore, the Human Reliability Analysis identified some operating and management improvements: action procedure optimization, alert warnings and staff training. The proposed model integrates the existing analysis techniques by applying the results to an atypical work environment and there are useful suggestions for improving the system reliability.

  18. Risk analysis and reliability of the GERDA Experiment extraction and ventilation plant at Gran Sasso mountain underground laboratory of Italian National Institute for Nuclear Physics

    Energy Technology Data Exchange (ETDEWEB)

    Lombardi, Mara; Garzia, Fabio; Guarascio, Massimo; Giovannone, Enzo Paolo; Giampaoli, Antonio; Musti, Mafalda; Ranalli, Maria Teresa; Perruzza, Roberto; Tartaglia, Roberto, E-mail: mara.lombardi@uniroma1.it, E-mail: fabio.garzia@uniroma1.it, E-mail: massimo.guarascio@uniroma1.it [Universita degli Studi di Roma La Sapienza-Engineering Roma (Italy); Corpo Nazionale Vigili del Fuoco L' Aquila (CNVF) (Italy); Istituto Nazionale di Fisica Nucleare - Laboratori del Gran Sasso L' Aquila, Abruzzo (Italy)

    2017-07-15

    The aim of this study is the risk analysis evaluation about argon release from the GERDA experiment in the Gran Sasso underground National Laboratories (LNGS) of the Italian National Institute for Nuclear Physics (INFN). The GERDA apparatus, located in Hall A of the LNGS, is a facility with germanium detectors located in a wide tank filled with about 70 m{sup 3} of cold liquefied argon. This cryo-tank sits in another water-filled tank (700 m{sup 3} ) at atmospheric pressure. In such cryogenic processes, the main cause of an accidental scenario is lacking insulation of the cryo-tank. A preliminary HazOp analysis has been carried out on the whole system. The risk assessment identified two possible top-events: explosion due to a Rapid Phase Transition - RPT and argon runaway evaporation. Risk analysis highlighted a higher probability of occurrence of the latter top event. To avoid emission in Hall A, the HazOp, Fault Tree and Event tree analyses of the cryogenic gas extraction and ventilation plant have been made. The failures related to the ventilation system are the main cause responsible for the occurrence. To improve the system reliability some corrective actions were proposed: the use of UPS and the upgrade of damper opening devices. Furthermore, the Human Reliability Analysis identified some operating and management improvements: action procedure optimization, alert warnings and staff training. The proposed model integrates the existing analysis techniques by applying the results to an atypical work environment and there are useful suggestions for improving the system reliability. (author)

  19. [Gerda Alexander eutonia].

    Science.gov (United States)

    Murcia, R

    1991-01-01

    One of the most important objectives of euronia is to find the adequate tonus in situations of total rest or of maximum dynamism. The dimension of tonic mastery together with relaxation make eutonia an extremely useful method in phoniatrics and orthophony.

  20. Characterization of the liquid argon veto of the GERDA experiment and its application for the measurement of the "7"6Ge half-life

    International Nuclear Information System (INIS)

    Wegmann, Anne Christin

    2017-01-01

    The search for neutrinoless double-beta decay (0νββ) is one of the most active fields in modern particle physics as the observation of this process would prove lepton number violation and imply new physics beyond the Standard Model of particle physics. The GERDA experiment searches for this decay by operating bare Germanium detectors, enriched in the ββ isotope "7"6Ge, in liquid argon. For the first time, a ββ-experiment combines the excellent properties of semiconductor Germanium detectors with an active background suppression technique based on the simultaneous detection of liquid argon scintillation light by photomultiplier tubes and silicon photomultipliers coupled to scintillating fibers (LAr veto). The LAr veto has been successfully operated during the first six months of Phase II of the experiment and yielded - in combination with a Germanium detector pulse shape discrimination technique - a background index of (0.7"+"1"."1_-_0_._5).10"-"3 ((cts)/(kg.keV.yr)). With an ultimate exposure of 100 kg.yr this will allow for a 0νββ-decay half-life sensitivity of the Gerda Phase II experiment of 10"2"6 yr. Double-beta decay under the emission of two neutrinos (2νββ) is a second-order process but which is allowed by the Standard Model. The excellent background reduction of the LAr veto results in an unprecedented signal-to-background ratio of 30:1 in the energy region dominated by 2νββ-decay of "7"6Ge. The remaining background after LAr veto is estimated using the suppression factor from calibration source measurements and results in a measurement of T"2"ν_1_/_2=(1.98±0.02(stat)±0.05(syst)).10"2"1 yr and T_1_/_2"2"ν=(1.92 ±0.02(stat)±0.11(syst)).10"2"1 yr based on two different detector designs and give uncertainties on the detector parameters but both with improved systematic uncertainties in comparison to earlier measurements.

  1. Liquid argon as active shielding and coolant for bare germanium detectors. A novel background suppression method for the GERDA 0νββ experiment

    International Nuclear Information System (INIS)

    Peiffer, J.P.

    2007-01-01

    Two of the most important open questions in particle physics are whether neutrinos are their own anti-particles (Majorana particles) as required by most extensions of the StandardModel and the absolute values of the neutrino masses. The neutrinoless double beta (0νββ) decay, which can be investigated using 76 Ge (a double beta isotope), is the most sensitive probe for these properties. There is a claim for an evidence for the 0νββ decay in the Heidelberg-Moscow (HdM) 76 Ge experiment by a part of the HdM collaboration. The new 76 Ge experiment Gerda aims to check this claim within one year with 15 kg.y of statistics in Phase I at a background level of ≤10 -2 events/(kg.keV.y) and to go to higher sensitivity with 100 kg.y of statistics in Phase II at a background level of ≤10 -3 events/(kg.keV.y). In Gerda bare germanium semiconductor detectors (enriched in 76 Ge) will be operated in liquid argon (LAr). LAr serves as cryogenic coolant and as high purity shielding against external background. To reach the background level for Phase II, new methods are required to suppress the cosmogenic background of the diodes. The background from cosmogenically produced 60 Co is expected to be ∝2.5.10 -3 events/(kg.keV.y). LAr scintillates in UV (λ=128 nm) and a novel concept is to use this scintillation light as anti-coincidence signal for background suppression. In this work the efficiency of such a LAr scintillation veto was investigated for the first time. In a setup with 19 kg active LAr mass a suppression of a factor 3 has been achieved for 60 Co and a factor 17 for 232 Th around Q ββ = 2039 keV. This suppression will further increase for a one ton active volume (factor O(100) for 232 Th and 60 Co). LAr scintillation can also be used as a powerful tool for background diagnostics. For this purpose a new, very stable and robust wavelength shifter/reflector combination for the light detection has been developed, leading to a photo electron (pe) yield of as much as

  2. Characterization of the liquid argon veto of the GERDA experiment and its application for the measurement of the {sup 76}Ge half-life

    Energy Technology Data Exchange (ETDEWEB)

    Wegmann, Anne Christin

    2017-01-18

    The search for neutrinoless double-beta decay (0νββ) is one of the most active fields in modern particle physics as the observation of this process would prove lepton number violation and imply new physics beyond the Standard Model of particle physics. The GERDA experiment searches for this decay by operating bare Germanium detectors, enriched in the ββ isotope {sup 76}Ge, in liquid argon. For the first time, a ββ-experiment combines the excellent properties of semiconductor Germanium detectors with an active background suppression technique based on the simultaneous detection of liquid argon scintillation light by photomultiplier tubes and silicon photomultipliers coupled to scintillating fibers (LAr veto). The LAr veto has been successfully operated during the first six months of Phase II of the experiment and yielded - in combination with a Germanium detector pulse shape discrimination technique - a background index of (0.7{sup +1.1}{sub -0.5}).10{sup -3} ((cts)/(kg.keV.yr)). With an ultimate exposure of 100 kg.yr this will allow for a 0νββ-decay half-life sensitivity of the Gerda Phase II experiment of 10{sup 26} yr. Double-beta decay under the emission of two neutrinos (2νββ) is a second-order process but which is allowed by the Standard Model. The excellent background reduction of the LAr veto results in an unprecedented signal-to-background ratio of 30:1 in the energy region dominated by 2νββ-decay of {sup 76}Ge. The remaining background after LAr veto is estimated using the suppression factor from calibration source measurements and results in a measurement of T{sup 2ν}{sub 1/2}=(1.98±0.02(stat)±0.05(syst)).10{sup 21} yr and T{sub 1/2}{sup 2ν}=(1.92 ±0.02(stat)±0.11(syst)).10{sup 21} yr based on two different detector designs and give uncertainties on the detector parameters but both with improved systematic uncertainties in comparison to earlier measurements.

  3. Liquid argon as active shielding and coolant for bare germanium detectors. A novel background suppression method for the GERDA 0{nu}{beta}{beta} experiment

    Energy Technology Data Exchange (ETDEWEB)

    Peiffer, J.P.

    2007-07-25

    Two of the most important open questions in particle physics are whether neutrinos are their own anti-particles (Majorana particles) as required by most extensions of the StandardModel and the absolute values of the neutrino masses. The neutrinoless double beta (0{nu}{beta}{beta}) decay, which can be investigated using {sup 76}Ge (a double beta isotope), is the most sensitive probe for these properties. There is a claim for an evidence for the 0{nu}{beta}{beta} decay in the Heidelberg-Moscow (HdM) {sup 76}Ge experiment by a part of the HdM collaboration. The new {sup 76}Ge experiment Gerda aims to check this claim within one year with 15 kg.y of statistics in Phase I at a background level of {<=}10{sup -2} events/(kg.keV.y) and to go to higher sensitivity with 100 kg.y of statistics in Phase II at a background level of {<=}10{sup -3} events/(kg.keV.y). In Gerda bare germanium semiconductor detectors (enriched in {sup 76}Ge) will be operated in liquid argon (LAr). LAr serves as cryogenic coolant and as high purity shielding against external background. To reach the background level for Phase II, new methods are required to suppress the cosmogenic background of the diodes. The background from cosmogenically produced {sup 60}Co is expected to be {proportional_to}2.5.10{sup -3} events/(kg.keV.y). LAr scintillates in UV ({lambda}=128 nm) and a novel concept is to use this scintillation light as anti-coincidence signal for background suppression. In this work the efficiency of such a LAr scintillation veto was investigated for the first time. In a setup with 19 kg active LAr mass a suppression of a factor 3 has been achieved for {sup 60}Co and a factor 17 for {sup 232}Th around Q{sub {beta}}{sub {beta}} = 2039 keV. This suppression will further increase for a one ton active volume (factor O(100) for {sup 232}Th and {sup 60}Co). LAr scintillation can also be used as a powerful tool for background diagnostics. For this purpose a new, very stable and robust wavelength

  4. "seisatan sel minemise rajal..." : [luuletused] / Hanna Kangro

    Index Scriptorium Estoniae

    Kangro, Hanna

    2006-01-01

    Sisu: "seisatan sel minemise rajal..." ; "mingis hääletus sisemuses..." ; "murdumisnurk terav..." ; "Vasaku käe veen on veel vaba" ; "jaapanlased teevad ületunde..." ; "kuulsin praginat..." ; "kütan kolme ahju..." ; "tühi hääbunud õhtune pühapäev..." ; "ootasin tulemist..."

  5. Positive effects, side effects, and adverse events of clinical holistic medicine. A review of Gerda Boyesen's nonpharmaceutical mind-body medicine (biodynamic body-psychotherapy) at two centers in the United Kingdom and Germany.

    Science.gov (United States)

    Allmer, Charlotte; Ventegodt, Søren; Kandel, Isack; Merrick, Joav

    2009-01-01

    To review adverse events of intensive, clinical holistic medicine (CHM) as it is practiced in holistic body-psychotherapy in England and Germany. Gerda Boyesen's "biodynamic body-psychotherapy" (BBP) is an intensive type of holistic mind-body medicine used by Boyesen at two centers. About 13,500 patients were treated during 1985-2005 period and studied for side effects and adverse events. The first author worked closely with Boyesen 1995-2005 with full insight in all aspects of the therapy and provided the data on side-effects. Therapy helped chronic patients with physical, psychological, sexual, psychiatric and existential problems to improve health, ability, and quality of life (NNT (number needed to treat) = 1-3). Effective in the treatment of mentally ill patients (schizophrenia, anxiety, poor mental health, low general ability). For retraumatization, brief reactive psychosis, depression, depersonalization and derealization, implanted memories, side effects from manipulations of the body, suicide/suicide attempts, hospitalization for physical and mental health problem during or 90 days after treatment, NNH (number needed to harm) > 13,500. Intensive, holistic non-drug medicine is helpful for physical, sexual, psychological, psychiatric and existential problems and is completely safe for the patient. The therapeutic value TV = NNH/NNT > 5,000. Altogether about 18,000 patients treated with different subtypes of CHM in four different countries have now been evaluated for effects, side effects and adverse events, with similar results.

  6. Efficient solvent extraction of antioxidant-rich extract from a tropical diatom, Chaetoceros calcitrans (Paulsen Takano 1968

    Directory of Open Access Journals (Sweden)

    Su Chern Foo

    2015-10-01

    Conclusions: Methanol was the recommended solvent for the production of antioxidant rich extract from C. calcitrans. Both carotenoids and phenolic acids were found to be positively correlated to the antioxidant capacities of C. calcitrans. Lead bioactives confirmed by subsequent high performance liquid chromatography studies were fucoxanthin, gallic acid and protocatechuic acid.

  7. Living with a parasite / Elo-Hanna Seljamaa

    Index Scriptorium Estoniae

    Seljamaa, Elo-Hanna, 1980-

    2004-01-01

    Ehtekunstnike Kärt Marani (s. 1980), Argo Männiku (s. 1977), Bruno Lillemetsa (s. 1979), Sven Tali, Ester Faimani (s. 1975), Maarja Niinemäe ja Katrin Veegeni näitus "Tallinna lennuväli : anti-venenos"

  8. Lying in business : Insights from Hanna Arendt's 'Lying in Politics'

    NARCIS (Netherlands)

    Eenkhoorn, P.; Graafland, J.J.

    2011-01-01

    The political philosopher Hannah Arendt develops several arguments regarding why truthfulness cannot be counted among the political virtues. This article shows that similar arguments apply to lying in business. Based on Hannah Arendt's theory, we distinguish five reasons why lying is a structural

  9. Jutud / Jerome K Jerome ; tlk. Gerda Kroom

    Index Scriptorium Estoniae

    Jerome, Jerome K., 1859-1927

    1997-01-01

    Järjejutt. Lõpp: 26. juuni 1997. Sisu : Onu Podger töötamas; Joostes rongile; Kaks tüdrukut sisseoste tegemas; Tandem; Mees, kes ei uskunud õnne; Hajameelne mees; Telefoni esimesed sammud; Üks hea nõuanne; Vestlussõnastikud; Kas parandada või sõita?

  10. The marine diatom Chaeroceros simplex calcitrans Paulsen and its environment. Effects of light and ultraviolet irradiations on the biosynthesis of fatty acids

    International Nuclear Information System (INIS)

    Boutry, J.-L.; Barbier, Michel

    1976-01-01

    In continuous light (24/24 h) or with a 12/24 h photophase, the diatom synthesizes the same total amount of fatty acids. But the photophase considerably increases some of them: C18:2(+535%), C17:2(+422%), C17:0(+97%), C19:0(+97%), C17:1(+72%). Adding ultraviolet irradiations to the two mentioned conditions of light also increases the total amount of fatty acids and induces the biosynthesis of the C20:0. The results are discussed [fr

  11. Workshop on The Functional Analysis of Quantum Information Theory : a Collection of Notes Based on Lectures by Gilles Pisier, K. R. Parthasarathy, Vern Paulsen and Andreas Winter

    CERN Document Server

    Gupta, Ved Prakash; Sunder, V S

    2015-01-01

    This book provides readers with a concise introduction to current studies on operator-algebras and their generalizations, operator spaces and operator systems, with a special focus on their application in quantum information science. This basic framework for the mathematical formulation of quantum information can be traced back to the mathematical work of John von Neumann, one of the pioneers of operator algebras, which forms the underpinning of most current mathematical treatments of the quantum theory, besides being one of the most dynamic areas of twentieth century functional analysis. Today, von Neumann’s foresight finds expression in the rapidly growing field of quantum information theory. These notes gather the content of lectures given by a very distinguished group of mathematicians and quantum information theorists, held at the IMSc in Chennai some years ago, and great care has been taken to present the material as a primer on the subject matter. Starting from the basic definitions of operator space...

  12. Kirjandus- ja kultuuritegelased Pärnu Alevi kalmistul / Gerda Kuum

    Index Scriptorium Estoniae

    Kuum, Gerda

    2007-01-01

    Jutukirjanik Suve Jaan, kodanikunimega Sommer Johann Friedrich (1777-1851); baltisaksa kirjamees ja pastor Johann Heinrich Rosenplänter (1782-1846); kirjamees ja köster Caspar Franz Lorenzsonn (1811-1880); köster Heinrich Gottlieb Lorenzsonn (1803-1847); trükkal ja kirjastaja Friedrich Wilhelm Bonn (1812-1881); linnapead Oskar Alexander Brackmann (1841-1927) ja Jaan Leesment (1870-1941)

  13. Kelder. Gerda Taljaard. Kaapstad: Tafelberg, 2012. 224 pp. ISBN ...

    African Journals Online (AJOL)

    There are. Benjamin's girlfriends—Elzette, the evil blonde skinny lawyer, and Martine, the goth with porcelain skin who plays jazz saxophone in her soundproof bathroom whilst standing on the toilet seat. One of Esmeralda's boyfriends is a butcher with massive sideburns. Another boyfriend is a professional big game hunter,.

  14. H08745: NOS Hydrographic Survey , Vicinity of Hanna Reef, Texas, 1965-06-24

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The National Oceanic and Atmospheric Administration (NOAA) has the statutory mandate to collect hydrographic data in support of nautical chart compilation for safe...

  15. Täiustatud tõde ehk Walter Andersoni rahvajuttude enesekontrolli seadus / Elo-Hanna Seljamaa

    Index Scriptorium Estoniae

    Seljamaa, Elo-Hanna, 1980-

    2007-01-01

    Geograafilis-ajaloolise meetodi lähtealuste ja eesmärkide toel analüüsitakse Walter Andersoni, Tartu Ülikooli esimese folkloristikaprofessori käsitlusi folkloorist ja folkloori uurimisest ning tema tegevust meetodi edasiarendajana

  16. Paide raekoja (Keskväljak 14) renoveerimine / Merike Kordemets, Annes Arro, Hanna Karits

    Index Scriptorium Estoniae

    Kordemets, Merike

    2009-01-01

    Ill.: situatsiooniplaan, 1. ja 2. korruse plaan, välisvaade, 3 sisevaadet; fotod: Kalle Veesaar, Arne Maasik; muinsuskaitse eritingimused: Epi Tohvri, Pille Viirsalu; arhitektuur: Paide EKE Projekt; sisearhitektuur: Arro Projekt

  17. Maailma haridussihid aastateks 2015-2030 / Mart Laidmets, Hanna-Liis Kaarlõp-Nani

    Index Scriptorium Estoniae

    Laidmets, Mart, 1975-

    2015-01-01

    Lõuna-Koreas Incheonis hariduse maailmakonverentsil „World Education Forum 2015” olid päevakorral programmis "Haridus kõigile" seatud sihtide mõju haridusele ning edasiste eesmärkide seadmine

  18. Giant fat containing breast masses: report of six cases | Hanna | East ...

    African Journals Online (AJOL)

    Six patients with giant fat containing breast masses encountered over a 20 year period are presented including a brief review of the literature. These benign tumours especially the giant varieties are rare but are likely to be increasingly diagnosed because of the widespread use of mammography. (East African Medical ...

  19. Klassitsismist kui stiilimõistest kujutavas kunstis / Kadi Polli ; tõlk. Hanna Miller

    Index Scriptorium Estoniae

    Polli, Kadi, 1973-

    2008-01-01

    Polemiseeritakse stiilimõiste "klassitsism" kasutamise üle 18.-19. sajandi vahetusel kunsti üldnimetajana ja käsitletakse Balti maastikumaali G.F. Kügelgeni, K.F. Kügelgeni, C. Grassi, K.A. Senffi jt. tööde näitel, mis vastavad küll selle perioodi valgustuslikule mõttele, kuid ei küüni stiiliajaloo klassitsismi kõrgete ideaalideni. Samas nõuaks mõiste täpsustamist ja hinnangu andmiseks uut lähenemist ning ümberväärtustamist

  20. Maksuarvestuse muudatused nõuavad muutuste tegemist majandustarkvaras / Hanna Dunning, Jelena Abaimova

    Index Scriptorium Estoniae

    Dunning, Hanna

    2003-01-01

    Alates 2005. aastast on Euroopa Ühenduse väärtpaberiturgudel noteeritud ettevõtted kohustatud raamatupidamisaruandluse koostama vastavalt IAS-ile (International Accounting Standards). Lisa: IASi kasutuselevõtul arvesta

  1. Tabish Khair, Martin Leer, Justin Edwards & Hanna Ziadeh, eds. Other Routes - 1500 Years of African and Asian Travel Writing

    Directory of Open Access Journals (Sweden)

    Florence D’SOUZA

    2006-10-01

    Full Text Available This anthology of extracts from non-European travel texts, by Asians and Africans, in English translation, spans from the 5th century AD to the 19th century AD. It is edited by four contemporary scholars, one of Indian origin, two Danish, and one of Egyptian origin, all attached to Danish academic institutions. Six other contemporary scholars from a variety of countries have also contributed extracts and introductory presentations among the book's thirty-three sections, that include the writi...

  2. Rundum artist-run space and its elusive form / Hanna Laura Kaljo, Mari-Leen Kiipli, Kulla Laas ... [jt.

    Index Scriptorium Estoniae

    2015-01-01

    Rundum on 2013. a septembris Tallinnas loodud liikuv loominguline platvorm, mille eesmärgiks on suhestuda erinevate kohtadega, reageerida tühikutele Eesti loomemaastikus ning uurida sealjuures ka omaalgatuslike praktikate võimalikkust kohalikus kontekstis. Vestlusringis Rundumi algatajad Mari-Leen Kiipli, Kulla Laas, Aap Tepper, Mari Volens, Kristina Õllek

  3. Underground coal gasification: Development of theory, laboratory experimentation, interpretation, and correlation with the Hanna field tests: Final report

    Energy Technology Data Exchange (ETDEWEB)

    Gunn, R.D.; Krantz, W.B.

    1987-03-01

    The following report is a description of a 7 year effort to develop a theoretical understanding of the underground coal gasification process. The approach used is one of the mathematical model development from known chemical and principles, simplification of the models to isolate important effects, and through validation of models to isolate important effects, and through validation of models with laboratory experiments and field test data. Chapter I contains only introductory material. Chapter II describes the development of two models for reverse combustion: a combustion model and a linearized model for combustion front instability. Both models are required for realistic field predictions. Chapter III contains a discussion of a successful forward gasification model. Chapter IV discusses the spalling-enhanced-drying model is applicable to prediction of cavity growth and subsidence. Chapter VI decribes the correct use of energy and material balances for the analysis of UCG field test data. Chapter VII shows how laboratory experiments were used to validate the models for reverse combustion and forward gasification. It is also shown that laboratory combustion tube experiments can be used to simulate gas compositions expected from field tests. Finally, Chapter VII presents results from a comprehensive economic analysis of UCG involving 1296 separate cases. 37 refs., 49 figs., 12 tabs.

  4. Mineviku, oleviku ja tuleviku dünaamikast Kristjan Raua vaadetes ja tegevuses / Elo-Hanna Seljamaa

    Index Scriptorium Estoniae

    Seljamaa, Elo-Hanna, 1980-

    2008-01-01

    Kristjan Raua vaadetest ja tegevusest kaasaegsete rahvuslike ideede ja taotluste taustal, viisist mõtestada ja suhestada rahvakunsti ja kujutavat kunsti, arendades nõnda rahvuslikku kunsti ja rahvuskultuuri ning tema loomingu ja ühiskondliku tegevuse vahelistest seostest

  5. Mineke Bosch, Ulrike Krampl, Hanna Hacker (Hg.: Spektakel. Köln u.a.: Böhlau Verlag 2012.

    Directory of Open Access Journals (Sweden)

    Hanna Heinrich

    2013-05-01

    Full Text Available Die von Bosch, Hacker und Krampl herausgegebene Ausgabe von L’Homme ist dem Zurschaustellen als bewusst gewähltem Akt der Grenzauslotung und potentiellen Grenzüberschreitung, aber auch der damit einhergehenden Reproduktion der Geschlechterrollen gewidmet. Die Autor/-innen beleuchten dabei vor allem anhand verschiedener Lebensgeschichten unterschiedliche Möglichkeiten und Herangehensweisen, dem eigenen Leben einen spektakulären Aspekt und damit Möglichkeiten der Selbstermächtigung und Selbstdarstellung zu geben. Leider mangelt es den Texten an einem soliden theoretischen Fundament, beziehungsweise an klaren Begriffsdefinitionen, die für das Verständnis der Kategorie ‚Spektakel‘ hilfreich gewesen wären, so dass eine schlüssige Einordnung der einzelnen Beiträge in den Gesamtkontext des Bandes ausbleibt.The edition of L’Homme, edited by Bosch, Hacker, and Krampl, is dedicated to exhibition as a consciously chosen act of exploring and crossing boundaries as well as to the associated reproduction of gender roles. Using various biographies, the authors illustrate different possibilities for and approaches to giving the own life a spectacular facet and consequently offering potentials for empowerment and self-expression. Unfortunately, the texts lack a solid theoretical foundation as well as clear definitions of the terminology, which would have been helpful for understanding the category of the ‘spectacle.’ Thus, the volume fails to coherently integrate the individual articles into its overall context.

  6. 20 aastat tagasi talletatud Siberi elulugudest valmib telesari / Gerda Kulli-Kordemets ; intervjueerinud Erika Klaats

    Index Scriptorium Estoniae

    Kulli-Kordemets, Gerda

    2010-01-01

    Uuest telesarjast tööpealkirjaga "Siber", mis räägib 14. 06. 1941 Virumaalt küüditatud politseinike lastest, kes viidi Tomski oblastisse Vasjuganje piirkonda. Stsenarist Merle Karusoo, kunstnik Eugen Tamberg, tegevprodutsent Mart Saar. Dokumentaalfilm tööpealkirjaga "Memento" tutvustab telesarja tegelaste prototüüpe ja reaalseid tegevuskohti. ETV võttegrupi käigust Tomski oblastisse

  7. Est pictura po︠sis, est po︠sis pictura. Carl Grassi (1767-1814) maastikud / Kadi Polli ; tõlk. Hanna Miller

    Index Scriptorium Estoniae

    Polli, Kadi, 1973-

    2007-01-01

    Kirjanik ja kunstnik C. Grass sündis 8. oktoobril Liivimaal, suri 22. juulil Roomas. Elust ja kunstiloomingust, reisidest, sidemetest kaasaegsete vaimuinimestega, töödest Tartu Ülikooli kunstikogus

  8. Purpurmust Org : Urmo Mets, Allar Lepa, Martin Vabat, Marje Ingel, Carolina Pihelgas, Siim Kera, Hanna Kangro, Kaarel B Väljamäe

    Index Scriptorium Estoniae

    2008-01-01

    Sisu: Kultuurinartsiss; "lugesin enne roostet..." ; Eravaldus ; "riik nagu..." ; "Novembri lõpu õunapuud..." ; Mis siin ikka ; "su selgroog..." ; "hommikuti jääb pori kingatalla alla..." "lauale seisma jäänud sibul haiseb nagu venelase higi..."

  9. YES-liikumine annab endast värvikalt märku / Lilian-Hanna Taimla, Heiko Teern ; intervjueerinud Sirje Pärismaa

    Index Scriptorium Estoniae

    Taimla, Lilian-Hanna, 1961-

    2009-01-01

    Maaülikoolis alguse saanud YES-liikumise (Young Environmental Specialists) arhitektuurinäituse "Minu päris esimene enda projekteeritud unistuste kodu" uues spordihoones korraldasid maaülikooli kunsti- ja disainigrupp ning maaehituse osakond

  10. Püha Siimeoni ja Naisprohvet Hanna kiriku restaureerimine : Ahtri 5, Tallinn = Restoration of the Church of Righteous Symeon and Prophetess Ann : Ahtri 5, Tallinn / Epp Lankots

    Index Scriptorium Estoniae

    Lankots, Epp, 1976-

    2005-01-01

    18. sajandil ehitatud, 2001. a. Eesti Apostlik-Õigeusu Kirikule tagastatud kirikuhoone restaureerimine. Ees on interjööride konserveerimistööd. Uuringud: Juhan Kilumets, Eva Mölder. Arhitektuurne projekt: Tõnu Parmakson, Ilmar Kannelmäe. Konstruktiivne projekt: Aleksander Danil. Teostus: J. Kilumets (Rändmeister), T. Parmakson (Frantsiskus), E. Mölder (Vana Tallinn). Ill.: 3 värv. välis- ja 3 sisevaadet

  11. Hanna Meißner: Jenseits des autonomen Subjekts. Zur gesellschaftlichen Konstitution von Handlungsfähigkeit im Anschluss an Butler, Foucault und Marx. Bielefeld: transcript Verlag 2010.

    Directory of Open Access Journals (Sweden)

    Stefan Schoppengerd

    2012-02-01

    Full Text Available Die Autorin nimmt feministische und postkoloniale Problematisierungen des Subjektbegriffes auf. Diese implizieren eine grundsätzliche Infragestellung subjektiver, kritischer Handlungsfähigkeit. Um die Vorstellung einer solchen nicht gänzlich verwerfen zu müssen, rekonstruiert sie drei theoretische Perspektiven (Judith Butler, Michel Foucault, Karl Marx mit unterschiedlichen Reichweiten und Gegenständen, die aber gemein haben, subjektive Handlungsfähigkeit gerade als Effekt widersprüchlicher Strukturen zu konzeptionalisieren. Dabei fokussiert sie nicht die – durchaus vorhandenen – Widersprüche zwischen den Ansätzen, sondern stellt sie in Form einer Synopse nebeneinander.The author incorporates feminist and postcolonial problematizations of the subject concept. These imply a fundamental questioning of subjective, critical agency. In order to prevent having to completely reject this concept, she reconstructs three theoretical perspectives (Judith Butler, Michel Foucault, Karl Marx with varying range and focus, which nevertheless indeed share the conceptualization of subjective agency as an effect of contradictory structures. In doing so, she does not focus on the – certainly existing – contradictions between the approaches, but compares them in the form of a synopsis.

  12. [Hanna Ivanivna Sylakova--a bright personality, scientist and pedagogue by vocation. On the 100th anniversary of birthday 4.12.1908-6.05.1980].

    Science.gov (United States)

    Vynohradova, R P

    2008-01-01

    H. I. Sylakova, doctor of science in biology, senior scientific worker, assistant professor, was born in Kharkiv, graduated from the faculty of pediatry of the 1st Kharkiv Medical Institute (1927-1931) and passed through the postgraduate course. In 1938 she defended her thesis for the candidate's degree. In 1935-1941 she firstly worked as the assistant, and then the assistant professor of the Department of Biochemistry of the 1st Kharkiv Medical Institute. In the period of evacuation (1941-1946) she worked as the head of the Department of Biochemistry at the Chelyabinsk Medical Institute. From 1947 to 1980 H. I. Sylakova worked as the senior scientific worker at the Department of Muscle Biochemistry of the Academy of Sciences of the Ukr. SSR. She was given the scientific status of the assistant professor in 1941, senior scientific worker in 1949. In 1956 she defended her thesis for the doctor's degree. Jointly with D. L. Ferdman H. I. Sylakova firstly found and investigated physiological role and transformation ways of glutamine in muscles. She was the first to find and investigate the enzyme glutaminase in different muscles of animals (skeletal, heart, stomach, kidneys muscles) and in their subcellular elements in norm and under various pathologic conditions. She has elaborated the method of isolation of pure nuclear fraction with unchanged structure. The results of scientific investigations were reported at numerous congresses, conferences, symposia and published in more than 100 scientific works; she prepared 7 candidates of science and a lot of graduates. H. I. Sylakova worked as a secretary of the Kyiv Division of Biochemical Society, Scientific Secretary of the research problem Animal and Human Biochemistry of the Academy of Sciences of the USSR and Ukr. SSR, Editor-in-chief of the Ukrainian Biochemical Journal, head of the State Examination Commission of Biologic faculty of the Kyiv State University, etc. Her work was marked by the medal For Distinguished Labour in the Great Patriotic war of 1941-1945.

  13. Revisiting the left cabinet share: How to measure the partisan profile of governments in welfare state research / Holger Döring, Hanna Schwander

    Index Scriptorium Estoniae

    Döring, Holger

    2015-01-01

    Artiklis analüüsitakse poliitilise vasakpoolsuse võimu, täpsemalt on vaatluse all sotsiaaldemokraatide osakaal eri riikide (sh Eesti) valitsustes ning milline on selle mõju heaoluriigi kujunemisele ja poliitika tulemustele.

  14. Ümberkujundava juhtimise karismaatiline aspekt ja selle tõhusus / Kulno Türk, Gerda Mihhailova

    Index Scriptorium Estoniae

    Türk, Kulno, 1954-

    2004-01-01

    Autorite arvates ei tohi vastandada klassikalist juhtimist eestvedamisele ning juhi ja liidri rollid on mõlemad olulised organisatsiooni edukuse eeldused. Edukas juht peab kasutama tasakaalustatult erinevaid juhtimisstiile. Skeem

  15. Subjectivity Matters: Using Gerda Lerner's Writing and Rhetoric to Claim an Alternative Epistemology for the Feminist Writing Classroom

    Science.gov (United States)

    Ryan, Kathleen J.

    2006-01-01

    In this article, the author argues the common assumption among teachers that the traditional academic essay is the most appropriate sustained writing activity for students. As a feminist, the author believes that the traditional academic essay considers a positivist, patriarchal epistemology that governs beliefs about knowledge and teaching…

  16. Pronksiööl küpsenud valus tõde / Gerda Kordemets ; intervjueeris Jüri Aarma

    Index Scriptorium Estoniae

    Kordemets, Gerda, 1960-

    2009-01-01

    ETV lavastuslike saadete toimetuse juhataja meenutab Tallinna Linnateatri lavastuse "Karin ja Indrek. Tõde ja õigus" Eesti Televisioonile lindistamist aprillis 2007. Lavastaja Elmo Nüganen, aluseks Tammsaare "Tõe ja õiguse" IV osa

  17. Kuriteoohvrite abistamisest Eestis : [bakalaureusetöö] / Gerda Sepp ; Tartu Ülikool, õigusteaduskond ; juhendaja: Silvia Kaugia

    Index Scriptorium Estoniae

    Sepp, Gerda

    2009-01-01

    Viktimoloogia mõistest ja olemusest, kuritegevusest Eestis viimasel viiel aastal, kuriteo negatiivsest mõjust selle ohvrile, ohvrite reaalsetest võimalustest abisaamiseks praeguses Eestis, hinnangust ohvriabi süsteemile Eestis

  18. Charismatic aspect of transformational leadership and its role in creating organizational culture / Gerda Mihhailova, Kulno Türk

    Index Scriptorium Estoniae

    Mihhailova, Gerda

    2006-01-01

    Ettevõtte kasvu- ja küpsusfaasis vajatakse autorite hinnangul enam nn. klassikalisi juhte, karismaatilised juhid sobivad pigem radikaalseid muutusi nõudvatesse situatsioonidesse, nagu näiteks ettevõtte rajamine või selle langusfaasist välja toomine. Skeemid. Tabel. Lisa lk. 194

  19. Evaluating the use of a customer resource management system in selected South African business schools / Gerda Schilling

    OpenAIRE

    Schilling, Gerda

    2014-01-01

    The management and implementation of unique resources contribute to the creation of a sustainable competitive advantage that has a positive impact on the owner of the resource’s profits. Customer relationship management becomes very important because customers with their own personal devices and options such as cloud computing, social media and mobility have converged into a renewed driving force expecting organisations to remember their experiences. These experiences should not been stored i...

  20. Web-Education Systems in Europe. ZIFF Papiere.

    Science.gov (United States)

    Paulsen, Morten; Keegan, Desmond; Dias, Ana; Dias, Paulo; Pimenta, Pedro; Fritsch, Helmut; Follmer, Holger; Micincova, Maria; Olsen, Gro-Anett

    This document contains the following papers on Web-based education systems in Europe: (1) "European Experiences with Learning Management Systems" (Morten Flate Paulsen and Desmond Keegan); (2) "Online Education Systems: Definition of Terms" (Morten Flate Paulsen); (3) "Learning Management Systems (LMS) Used in Southern…

  1. Tsiviilõiguslikud aspektid seoses rahvusvahelise lapserööviga lapsevanemate poolt : [bakalaureusetöö] / Hanna Kononov ; Tartu Ülikool, õigusteaduskond ; juhendaja: Kai Härmand

    Index Scriptorium Estoniae

    Kononov, Hanna

    2010-01-01

    Lapseröövi puudutavast õigusloomest rahvusvaheliselt (lapseröövi konventsioon, Brüsseli IIa määrus, ÜRO lapse õiguste konventsioon, vanema kohustuste konventsioon) ja Eesti õiguses (põhiseadus, lastekaitseseadus, perekonnaseadus), lapseröövi juhtumite analüüsist

  2. Hiina tänapäeva arhitektuur - karmiilmeline, aga põnev / Zhang Ke, Zhang Hong, Xiaodu Liu ; interv. Hanna Läkk ja Ene Läkk

    Index Scriptorium Estoniae

    Zhang Ke

    2006-01-01

    Intervjuu Hiina arhitektuuribüroo Standardarchitecture arhitektide Zhang Ke ja Zhang Hongiga ning arhitektuuribüroo Urbanus arhitekti Xiaodu Liuga Hollandis Hiina tänapäeva tutvustaval näitusel. Hiina arhitektide haridusest, oma arhitektuuribüroode töödest, tänapäeva hiina arhitektuurist, põhiprobleemidest

  3. Patch test reactions to mite antigens: a GERDA multicentre study. Groupe d'Etudes et de Recherches en Dermato-Allergie.

    Science.gov (United States)

    Castelain, M; Birnbaum, J; Castelain, P Y; Ducombs, G; Grosshans, E; Jelen, G; Lacroix, M; Meynadier, J; Mougeolle, J M; Lachapelle, J M

    1993-11-01

    We performed patch tests with Dermatophagoides pteronyssinus (Dp) antigens from 2 different sources in 355 non-randomly selected patients with atopic dermatitis (AD) and 398 subjects of a control group. The study demonstrated that contact sensitization to mites occurred in an appreciable % of AD cases (20.8%), using commonly available assay products. The differences recorded between the 2 materials tested were related to the concentration of P1 antigen. Non-atopic patients rarely showed positive reactions to Dp (0.75%), when strict criteria for readings were applied and if 2 readings were performed. Patients with positive patch tests did not necessarily show positive immediate skin tests. It would be useful to carry out tests systematically in atopic patients, even if it is not yet known what modern treatment would be best for the patient. Laboratories still do not provide standardized house dust mite preparations--measuring and codifying their biological activity--for use in patch tests. It is to be hoped that the extension of this type of test will lead to the production of better test materials, in syringes with homogeneous dispersion and concentration.

  4. Kelle nimel NO99 seekord kõneleb ja kelle poole pöördub? / Valle-Sten Maiste, Gerda Kordemets, Madli Pesti...[jt.

    Index Scriptorium Estoniae

    2011-01-01

    23. märtsil esietendub Nokia kontserdimajas NO99 lavastus"The Rise and Fall of Estonia", mis saab olema Eesti-teemaliste lavastuste tsükli lõpp. Lavastajad Ene-Liis Semper ja Tiit Ojasoo. Eesti teatrikriitikute ühendus tegi eksperimendi ja otsustas oma teatrimuljed kohe jäädvustada: esietendusjärgsel hilisõhtul vestlesid lavastusest erinevad eesti teatrikriitikud

  5. The Roman Empire - The Third Century Crisis and Crisis Management

    Science.gov (United States)

    2012-04-04

    December 2010. Hekster, Olivier, Gerda De Kleijn, and Danielle Slootjes. "Introduction." Impact of Empire. 7, (2006, June 1): 3-10. Koselleck...Crisis of the Third Century. Edited by Olivier Hekster, Gerda De Kleijn, and Danielle Slootjes. Vol. 7, Impact of EMpire. Boston: Brill Academic, 2012...1. Protagoras and John Nicols, Mapping the Crisis of the Third Century, ed. Olivier Hekster, Gerda De Kleijn, and Danielle Slootjes

  6. Factors associated with medication information in diabetes care: differences in perceptions between patients and health care professionals

    Directory of Open Access Journals (Sweden)

    Längst G

    2015-10-01

    Full Text Available Gerda Längst,1 Hanna Marita Seidling,2,3 Marion Stützle,2,3 Dominik Ose,1 Ines Baudendistel,1 Joachim Szecsenyi,1 Michel Wensing,1,4 Cornelia Mahler1 1Department of General Practice and Health Services Research, University Hospital of Heidelberg, Heidelberg, Germany; 2Cooperation Unit Clinical Pharmacy, University of Heidelberg, Heidelberg, Germany; 3Department of Clinical Pharmacology and Pharmacoepidemiology, University of Heidelberg, Heidelberg, Germany; 4Radboud University Nijmegen Medical Centre, Scientific Institute for Quality of Healthcare, Nijmegen, the Netherlands Purpose: This qualitative study in patients with type 2 diabetes and health care professionals (HCPs aimed to investigate which factors they perceive to enhance or impede medication information provision in primary care. Similarities and differences in perspectives were explored.Methods: Eight semistructured focus groups were conducted, four with type 2 diabetes patients (n=25 and four with both general practitioners (n=13 and health care assistants (n=10. Sessions were audio and video recorded, transcribed verbatim, and subjected to computer-aided qualitative content analysis.Results: Diabetes patients and HCPs broadly highlighted similar factors as enablers for satisfactory medication information delivery. Perceptions substantially differed regarding impeding factors. Both patients and HCPs perceived it to be essential to deliver tailored information, to have a trustful and continuous patient–provider relationship, to regularly reconcile medications, and to provide tools for medication management. However, substantial differences in perceptions related to impeding factors included the causes of inadequate information, the detail required for risk-related information, and barriers to medication reconciliation. Medication self-management was a prevalent topic among patients, whereas HCPs’ focus was on fulfilling therapy and medication management responsibilities

  7. Developing a Shared Patient-Centered, Web-Based Medication Platform for Type 2 Diabetes Patients and Their Health Care Providers: Qualitative Study on User Requirements.

    Science.gov (United States)

    Bernhard, Gerda; Mahler, Cornelia; Seidling, Hanna Marita; Stützle, Marion; Ose, Dominik; Baudendistel, Ines; Wensing, Michel; Szecsenyi, Joachim

    2018-03-27

    the platform to users' workflow. By employing a UCD, this study provides insight into the desired functionalities and usability of patients and HCPs regarding a shared patient-centered, Web-based medication platform, thus increasing the likelihood to achieve a functional and useful system. Substantial and ongoing engagement by all intended user groups is necessary to reconcile differences in requirements of patients and HCPs, especially regarding medication safety alerts and access control. Moreover, effective training of patients and HCPs on medication self-management (support) and optimal use of the tool will be a prerequisite to unfold the platform's full potential. ©Gerda Bernhard, Cornelia Mahler, Hanna Marita Seidling, Marion Stützle, Dominik Ose, Ines Baudendistel, Michel Wensing, Joachim Szecsenyi. Originally published in the Journal of Medical Internet Research (http://www.jmir.org), 27.03.2018.

  8. Saving Coalition Lives and Limbs: Disrupting the Improvised Explosive Device Network in Iraq with Center of Gravity Analysis and Social Network Viral Targeting

    Science.gov (United States)

    2008-12-21

    63, 73. 64. Evelin Gerda Lindner, ―In Times of In Times of Globalization and Human Rights: Does Humiliation Become the Most Disruptive Force...Force-Protection Issue, General Says.‖ American Forces Press Service, 14 February 2007. Lindner, Evelin Gerda . ―In Times of In Times of

  9. Værk og værksted

    DEFF Research Database (Denmark)

    Kjølsen, Tine; Gammelgaard, Jørgen

    2012-01-01

    Gerda Thune Andersen – Værk og Værksted Bogen er udgivet i forbindelse med jubilæumsudstillingen på Vendsyssel Kunstmuseum 31 august – 25 november 2012. Udstillingen er blevet til i et samarbejde mellem Vendsyssel Kunstmuseum og Gerda Thune Andersen. Tak til: Jørgen Gammelgaard, Tine Kjølsen, Anne...

  10. Reference: 359 [Arabidopsis Phenome Database[Archive

    Lifescience Database Archive (English)

    Full Text Available 359 http://metadb.riken.jp/db/SciNetS_ria224i/cria224u4ria224u16531491i Cnops Gerda...leaf development in Arabidopsis thaliana. 4 852-66 16531491 2006 Apr The Plant cell Azmi Abdelkrim|Cnops Gerda

  11. "Klass : elu pärast" võitis peaauhinna

    Index Scriptorium Estoniae

    2009-01-01

    Genfis toimunud rahvusvahelisel festivalil Cinema Tous Ecrans sai telesarjade võistlusprogrammis peaauhinna ETV sari "Klass : elu pärast", produtsent Gerda Kordemets, stsenarist Margit Keerdo, režissöörid Ilmar Raag, Gerda Kordemets, Liina Paakspuu, Priit Valkna ja Marek Miil

  12. "Klass : elu pärast" võitis rahvusvahelisel festivalil peaauhinna

    Index Scriptorium Estoniae

    2009-01-01

    Genfis toimunud rahvusvahelisel festivalil Cinema Tous Ecrans sai telesarjade võistlusprogrammis peaauhinna ETV sari "Klass : elu pärast", produtsent Gerda Kordemets, stsenarist Margit Keerdo, režissöörid Ilmar Raag, Gerda Kordemets, Liina Paakspuu, Priit Valkna ja Marek Miil

  13. Oceanographic profile temperature, salinity, oxygen, and nutrients measurements collected using bottle from the LCM Red in the Alaskan Coastal waters, from the Gerda in the Atlantic Ocean, and from DeSteiguer in the Pacific Ocean (NODC Accession 0002231)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Temperature, salinity, oxygen and other profile data received at NODC on 06/10/04 by Olga Baranova, digitized from "William J. Teague, Zachariah R. Hallock, Jan M....

  14. Long term monitoring of currents, conductivity, temperature, salinity, sigma-theta, pressure, waves, chlorophyll A, oxygen, and meteorology from moorings deployed at two locations in Massachusetts Bay from the platforms WHITE HEATH, ASTERIAS, CHRISTOPHER ANDREW, MARCUS HANNA, ABBIE BURGESS, LOONEY, and ARGO MAINE from January 1, 1986 to February 8, 2006 (NODC Accession 0060062)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Measurements of currents and other oceanographic properties were made at two locations to understand the transport and long-term fate of sediments and associated...

  15. Cell transformation mediated by the Epstein-Barr virus G protein-coupled receptor BILF1 is dependent on constitutive signaling

    DEFF Research Database (Denmark)

    Lyngaa, Rikke Birgitte; Nørregaard, K.; Kristensen, Martin

    2010-01-01

    Epstein-Barr virus (EBV) open reading frame BILF1 encodes a seven trans-membrane (TM) G protein-coupled receptor that signals with high constitutive activity through G alpha(i) (Beisser et al., 2005; Paulsen et al., 2005). In this paper, the transforming potential of BILF1 is investigated in vitro...

  16. Making Cooperative Learning Work in the College Classroom: An Application of the "Five Pillars" of Cooperative Learning to Post-Secondary Instruction

    Science.gov (United States)

    Jones, Karrie A.; Jones, Jennifer L.

    2008-01-01

    Cooperative learning is viable yet generally underutilized method of instruction at the college level (Paulsen and Faust, 2008). This paper highlights the work of teacher educator Dr. Paul J. Vermette in his implementation of cooperative learning based practices in a graduate level Multicultural education course. In analyzing the "Five…

  17. Koggen und kein Ende

    DEFF Research Database (Denmark)

    Jahnke, Carsten

    2011-01-01

    Begrebet "koggen" stå i moment mere og mere i videnskabs fokus. I denne sammenhang opstod en strid om 1. hvad begrebet "koggen" egentlig betyder, om det er en byggemåde af skibene, som Paulsen og Ellmers mener, eller om det er en størelsesenhed, som forfatter postulerer. Desuden er der 2. en stor...

  18. Archimedeanization of ordered vector spaces

    OpenAIRE

    Emelyanov, Eduard Yu.

    2014-01-01

    In the case of an ordered vector space with an order unit, the Archimedeanization method has been developed recently by V.I Paulsen and M. Tomforde. We present a general version of the Archimedeanization which covers arbitrary ordered vector spaces.

  19. Kot v pogone za Dzherri poimal 7 "Oskarov" / Jekaterina Zhivova

    Index Scriptorium Estoniae

    Zhivova, Jekaterina

    2005-01-01

    Hollywoodi stuudio Metro-Goldwyn-Mayer populaarseim animasari "Tom & Jerry" sai alguse 65 aastat tagasi filmiga "Kass saab saapad" ("Puss Gets the Boots"), loojateks Joseph Barbera (1911) ja William Hanna (1910-2001)

  20. 21. X avati Kaunase kunstibiennaal "Textile 2005"

    Index Scriptorium Estoniae

    2005-01-01

    Eestist osalevad Mare Kelpmann, Marika Kööbi, Aet Ollisaar, Kadi Pajupuu, Ludmilla Svarzhevska, Hanna Tiidus, Helen Kauksi, Krista Leesi, Aune Taamal, Erika Tammpere, Milvi Thalheim ja Erle Võsa-Tangsoo

  1. Semester piiri taga, ookeanil loksuvas laevaauditooriumis / Agne Narusk

    Index Scriptorium Estoniae

    Narusk, Agne

    2008-01-01

    Ülikoolist laevas, The Scholar Ship programmist, mis viib eri rahvusest üliõpilased neljaks kuuks ümbermaailma-õppereisile. Oma kogemusi laevas õppimisest jagavad Katrin Kaun, Natalja Tamm ja Hanna-Liina Linnasmäe

  2. Paide raekoja renoveerimine = Renovation of the Paide Town Hall / Margit Mutso

    Index Scriptorium Estoniae

    Mutso, Margit, 1966-

    2009-01-01

    Paide raekoja muinsuskaitse eritingimused koostasid Epi Tohvri ja Pille Viirsalu. Arhitekt Merike Kordemets (Paide EKE Projekt), sisearhitektid Annes Arro ja Hanna Karits (Arro Projekt). Sisekujunduses lähtuti juugendstiilist. Žürii hinnang kultuurkapitali aastapreemiale esitatud hoonele

  3. Järgmised kirjandusüritused

    Index Scriptorium Estoniae

    2010-01-01

    13. apr. esitleb P. I. Filimonov Tartu Kirjanduse Majas oma romaani "Mitteeukleidilise geomeetria tsoon", 14. apr. toimub Tallinna Kirjanike Majas rühmituse Purpurmust (Eia Uus, Martin Ellermaa, Hanna Kangro, Carolina Pihelgas, Allar Lepa) kirjandusõhtu

  4. Sada ruutmeetrit luksust / Maris Kerge

    Index Scriptorium Estoniae

    Kerge, Maris

    2013-01-01

    Korter Kadriorus Weizenbergi tänaval arhitekt Karl Burmani 1928. a. projekteeritud korterelamus. Sisearhitektid Hanna Karits ja Annes Arro (Arro Projekt OÜ). Korteri kese on spaavannituba. Erimööbel on sisearhitektide kavandatud. Ehitusaeg: 2012

  5. Miss Lora juveelikauplus = Miss Lora jewellery store

    Index Scriptorium Estoniae

    2009-01-01

    Narvas Fama kaubanduskeskuses (Tallinna mnt. 19c) asuva juveelikaupluse Miss Lora sisekujundusest. Sisearhitektid Annes Arro ja Hanna Karits. Poe sisu - vitriinkapid, vaip, valgustid - on valmistatud eritellimusel. Sisearhitektide tähtsamate tööde loetelu

  6. Aktivismist ja sekkunisest linnaruumi / Lilia del Rio

    Index Scriptorium Estoniae

    Rio, Lilia del

    2007-01-01

    25.-26. IV Eesti Kunstiakadeemias toimunud 4. Linnauurimuse päevadest "Uurimine ja aktivism". Hanna Harrise, Giacomo Botta, Joanna Saad-Suloneni, Liisa Horelli ja Rasmus Kase ettekannetest konverentsil. Sisaldab bibliograafiat

  7. Uus film tegi Raagist tegija / Andres Keil

    Index Scriptorium Estoniae

    Keil, Andres, 1974-

    2005-01-01

    Eesti Televisiooni fiktiivne dokumentaaldraama "August 1991" : stsenarist ja režissöör Ilmar Raag : produtsent Gerda Kordemets : operaator Janno-Hans Arro. Lisatud augustiputshi ajal teletorni kaitsnud Jüri Joosti ja Peeter Milli kommentaar

  8. Association of the pitch canker pathogen Fusarium circinatum with ...

    African Journals Online (AJOL)

    Association of the pitch canker pathogen Fusarium circinatum with grass hosts in commercial pine production areas of South Africa. Cassandra L Swett, Bernice Porter, Gerda Fourie, Emma T Steenkamp, Thomas R Gordon, Michael J Wingfield ...

  9. 77 FR 67665 - National Register of Historic Places; Notification of Pending Nominations and Related Actions

    Science.gov (United States)

    2012-11-13

    ... Mill, Jesus Barcinas Rd., Merizo, 12000973 INDIANA Porter County Meyer, Dr. John and Gerda, House, 360..., 345 Main St., East Aurora, 12000981 Herkimer County Perry, Stuart and William Swezey Houses, 7541...

  10. New generation in Estonian animation / Mari-Liis Rebane

    Index Scriptorium Estoniae

    Rebane, Mari-Liis, 1988-

    2010-01-01

    Eesti animafilmide loojate uuest põlvkonnast, animafilmide tegemise võimalustest, uute animafilmide tasemest. Martinus Daane Klemeti animafilmidest "Furry Flurry" (2006) ja "Light My Fire" (2007) ning joonisfilmist "Õhus" (Eesti Joonisfilm, 2009, kunstnik Gerda Märtens)

  11. Re-use of seedling containers and Fusarium circinatum association ...

    African Journals Online (AJOL)

    Re-use of seedling containers and Fusarium circinatum association with asymptomatic Pinus patula planting stock. Andrew R Morris, Gerda Fourie, Izette Greyling, Emma T Steenkamp, Nicoletta B Jones ...

  12. Physical control of the distributions of a key Arctic copepod in the Northeast Chukchi Sea

    Science.gov (United States)

    Elliott, Stephen M.; Ashjian, Carin J.; Feng, Zhixuan; Jones, Benjamin; Chen, Changsheng; Zhang, Yu

    2017-10-01

    The Chukchi Sea is a highly advective regime dominated by a barotropically driven northward flow modulated by wind driven currents that reach the bottom boundary layer of this shallow environment. A general northward gradient of decreasing temperature and food concentration leads to geographically divergent copepod growth and development rates between north and south. The physics of this system establish the biological connection potential between specific regions. The copepod Calanus glacialis is a key grazer, predator, and food source in Arctic shelf seas. Its summer distribution and abundance have direct effects on much of the food web, from phytoplankton to migrating bowhead whales. In August 2012 and 2013, C. glacialis distributions were quantified over Hanna Shoal in the northeast Chukchi Sea. Here an individual-based model with Lagrangian tracking and copepod life stage development capabilities is used to advect and develop these distributions forward and backward in time to determine the source (production locations) and sink (potential overwintering locations) regions of the transient Hanna Shoal C. glacialis population. Hanna Shoal supplies diapause competent C. glacialis to both the Beaufort Slope and the Chukchi Cap, mainly receives juveniles from the broad slope between Hanna Shoal and Herald Valley and receives second year adults from as far south as the Anadyr Gulf and as near as the broad slope between Hanna Shoal and Herald Valley. The 2013 sink region was shifted west relative to the 2012 region and the 2013 adult source region was shifted north relative to the 2012 adult source region. These connection potentials were not sensitive to precise times and locations of release, but were quite sensitive to depth of release. These patterns demonstrate how interannual differences in the physical conditions well south of Hanna Shoal play a critical role in determining the abundance and distribution of a key food source over Hanna Shoal and in the

  13. Social Media and Teaching

    DEFF Research Database (Denmark)

    Tække, Jesper; Paulsen, Michael

    New research in the Danish upper secondary schools shows that social media like Facebook is the number one attention diverts from the interaction about educational subjects in the classroom. At the same time international research shows that there is a great potential in using social media....... The overriding purpose of the paper is to provide a research-based input to the discussion about the role of social media in schools....... the past seven years (Paulsen & Tække 2009, 2010; Tække & Paulsen 2010). To find out if and how the gap can be reduced, we have initiated the action research project The Socio Media Education Experiment, and in the paper we explain both the background for the project and its preliminary results...

  14. Vigour Health: the ASC-Series launch in Canada

    OpenAIRE

    Danielsen, David M.; Fredriksen, Joakim; Nordli, Espen; Nøstberg, Bjørn R.

    2008-01-01

    This report is part of the authors’ bachelor degree in International Marketing and analyzes the Canadian vitamins and dietary supplements (VDS) industry. Based on this analysis, the authors will be proposing how Vigour can enter the market. Vigour Health was founded in 2006 by Omar Paulsen Bekheet and John Ivar Andre and the goal was to introduce a new lifestyle concept that should be inventive in its approach. Vigour utilizes raw materials from the northern parts of Norway, an...

  15. Minimal and Maximal Operator Space Structures on Banach Spaces

    OpenAIRE

    P., Vinod Kumar; Balasubramani, M. S.

    2014-01-01

    Given a Banach space $X$, there are many operator space structures possible on $X$, which all have $X$ as their first matrix level. Blecher and Paulsen identified two extreme operator space structures on $X$, namely $Min(X)$ and $Max(X)$ which represents respectively, the smallest and the largest operator space structures admissible on $X$. In this note, we consider the subspace and the quotient space structure of minimal and maximal operator spaces.

  16. The 76Ge Program to Search for Neutrinoless Double-Beta Decay

    Science.gov (United States)

    Guiseppe, Vincente

    2017-09-01

    Neutrinoless double-beta decay searches play a major role in determining the nature of neutrinos, the existence of a lepton violating process, and the effective Majorana neutrino mass. The Majorana and Gerda Collaborations are operating arrays of high purity Ge detectors to search for neutrinoless double-beta decay in 76Ge. The Majorana Demonstrator is operating at the Sanford Underground Research Facility in South Dakota while the Gerda experiment is operating at LNGS in Italy. The Gerda and Majorana Demonstrator experiments have achieved the lowest backgrounds in the neutrinoless double-beta decay region of interest. These results, coupled with the superior energy resolution (0.1%) of Ge detectors demonstrate that 76Ge is an ideal isotope for a large next generation experiment. The LEGEND collaboration, with 220 members from 47 institutions around the world, has been formed to pursue a ton scale 76Ge experiment. Building on the successes of Gerda and Majorana, the LEGEND collaboration aims to develop a phased neutrinoless double-beta decay experimental program with discovery potential at a half-life significantly longer than 1027 years. This talk will present the initial results from the Majorana Demonstrator and Gerda experiments and the plan for the LEGEND program.

  17. Phenomenology of experiential sharing

    DEFF Research Database (Denmark)

    León, Felipe; Zahavi, Dan

    2016-01-01

    The chapter explores the topic of experiential sharing by drawing on the early contributions of the phenomenologists Alfred Schutz and Gerda Walther. It is argued that both Schutz and Walther support, from complementary perspectives, an approach to experiential sharing that has tended to be overl......The chapter explores the topic of experiential sharing by drawing on the early contributions of the phenomenologists Alfred Schutz and Gerda Walther. It is argued that both Schutz and Walther support, from complementary perspectives, an approach to experiential sharing that has tended...

  18. 09 Kossew pp 134-146

    African Journals Online (AJOL)

    Tienie

    has increasingly expressed an interest in taking on a feminine voice ... ageing writer and a younger woman, and each is mediated by a male narrator. This article ... reconstruct the life of his protagonist, Hanna X, by giving her a voice, when he ...

  19. Visualizing Series

    Science.gov (United States)

    Unal, Hasan

    2008-01-01

    The importance of visualisation and multiple representations in mathematics has been stressed, especially in a context of problem solving. Hanna and Sidoli comment that "Diagrams and other visual representations have long been welcomed as heuristic accompaniments to proof, where they not only facilitate the understanding of theorems and their…

  20. Learning with Technology: Using Discussion Forums to Augment a Traditional-Style Class

    Science.gov (United States)

    Shana, Zuhrieh

    2009-01-01

    There is considerable evidence that using technology as an instructional tool improves student learning and educational outcomes (Hanna & de Nooy, 2003). In developing countries, pre-university education focuses on memorization, although meting the mission of AUST requires students to manage technology and to think more independently. This…

  1. Conductivity as an indicator of surface water quality in the proximity ...

    African Journals Online (AJOL)

    2015-10-05

    Oct 5, 2015 ... FeCr smelting did not significantly impact surface water quality, but that surface run-off and/or groundwater leaching ... (EIAs) were required, or for older FeCr smelters during the .... then used for the determination of conductivity with a Hanna ... significant differences in the conductivity values measured at.

  2. 2064-IJBCS-Aricle-Edmund Okorie

    African Journals Online (AJOL)

    hp

    turbidity, conductivity, total solids were higher in concentration during the flooding than before the flood. The. pH and alkalinity ... biological activities and thermal effect also may have ... The pH was determined using Hanna ... connecting the glass electrode to the buffer solution. ... mL of the water sample was measured and.

  3. Determination of Sugar and Some Trace Metals Content in Selected ...

    African Journals Online (AJOL)

    Ten brands of commercial fruit juices were analyzed for pH, specific gravity, total solids, reducing sugar and total sugar trace metals contents. The pH was determined using a Hanna pH meter. Sugar content was determined using the Lane and Eynon method. Sodium and potassium were determined by flame photometry ...

  4. Ernst Enno etluskonkursil kõlas saja aasta tagune luule / Krista Kumberg

    Index Scriptorium Estoniae

    Kumberg, Krista, 1959-

    2007-01-01

    Läänemaal toimus maakondlik Ernst Ennole pühendatud etluskonkurss. E. Enno nimelise etluskonkursi 2007 "Saja aasta tagused luuletused" parimad etlejad olid Mike Richard Koch, Janno Allika, Hanna Ring, Karl Poll, Britta Sool, Antero Rea, Jennifer Cohen, Brita Kaljuvee, Eva-Maria Brock, Kaupo Engel, Liisi Räli, Laivi Kovalenko, Merje Viigand, Carmen Freimann, Rauno Punk, Maarja Palmiste

  5. Järvamaa turismiinfokeskus = Järva County tourist information centre

    Index Scriptorium Estoniae

    2012-01-01

    Eesti Sisearhitektide Liidu 2011. a. "Väikse ruumi" preemia pälvinud Järvamaa turismiinfokeskuse (Paide, Keskväljak 8) renoveerimisest ja sisekujundusest. Sisearhitektid Annes Arro ja Hanna Karits (Arro Projekt). Loetletud sisearhitektide ühiselt tehtud töid. Arhitekt Merike Kordemets

  6. The History of Art Therapy at the National Institutes of Health

    Science.gov (United States)

    Robb, Megan

    2012-01-01

    The National Institutes of Health (NIH) Clinical Research Center is a government facility that has a long history of groundbreaking research. Art therapy research began at NIH in 1958 with Hanna Kwiatkowska, whose work contributed to the foundation of art therapy with families, and with Harriet Wadeson, who conducted psychodynamic art therapy…

  7. Süütust näpates

    Index Scriptorium Estoniae

    2007-01-01

    Tanel Veenre fotoseeria teatrikostüümidest Draamateatri laval. Stilist: Hanna Tiidus. Naine: Merle Palmiste. Poiss: Joonas (MJ-Models). Jumestus: Margit Soosaar. Juuksed: Jelena Radtsenkova. Kostüümid etendustest "Rohuvoodi" (Aime Unt), "Rehepapp", "Tõeline inspektor koer" (Ene-Liis Semper), "Liilia" (Lilja Blumenfeld), "Mort" (Kersti Varrak), "Potilaadale" (Reet Aus), "Amadeus" (Krista Tool)

  8. Islandi-elamus

    Index Scriptorium Estoniae

    2008-01-01

    Galeriis SooSoo on müügil islandi noorte disainerite tööd: Gudrun Lilja Gunnlaugsdottiri laserlõiketehnoloogias raamaturiiulid "Fairytale", Ingibjörg Hanna Bjarnadottiri riidepuud "Raven", Tinna Gunnarsdottiri kummist laualinikud "Samurai", Katrin Olina riidenagid "Tree" ja portselannõud

  9. Sífilis gestacional: enfermedad de interés en salud pública, Córdoba-Colombia, 2015

    Directory of Open Access Journals (Sweden)

    Concepción Amador Ahumada

    2017-01-01

    Cómo citar este artículo: Amador C, Hanna M, Villadiego M. Sífilis gestacional: enfermedad de interés en salud pública, Córdoba-Colombia, 2015.Rev Cuid. 2017; 8(1: 1449-58. http://dx.doi.org/10.15649/cuidarte.v8i1.350

  10. Uncontrolled Hypertension in a Child with Phaeochromocytoma ...

    African Journals Online (AJOL)

    TNHJOURNALPH

    challenges to the health system in resource-limited ... peripheral vascular effects of the excessive epinephrine and ... analysis. The report, obtained after 4 weeks, showed markedly elevated levels suggestive of .... the economy and the morale of the public. It highlights the ... medical tourism outside Nigeria and the. 6. Hanna ...

  11. Disainikaart : Island / Eve Arpo

    Index Scriptorium Estoniae

    Arpo, Eve

    2009-01-01

    Islandi disaineritest, disainifirmadest, arhitektidest. Katrin Olina, Margrét Hardardóttir ja Steve Christer (Studio Granda), Guđjón Samúelsson (1887-1950), Ingibjörg Hanna Bjarnadottir, Hrafnkell Birgisson, Studio Bility jt.

  12. Europarlament hakkas jagama filmipreemiaid / Andri Maimets

    Index Scriptorium Estoniae

    Maimets, Andri, 1979-

    2007-01-01

    Europarlamendi esimene filmipreemia Lux, mille materiaalseks ekvivalendiks on Paabeli torni kujutav kujuke ning filmi subtitreerimine 23 Euroopa keelde (lisaks üks koopia kurtidele), läks Saksa-Türgi filmile "Teisel pool" ("Auf der anderen Seite"). Filmi režissöör on Fatih Akin, preemia võttis vastu Hanna Schygulla

  13. Investigation of the Effect of Alkali Modification of Mucin on Some ...

    African Journals Online (AJOL)

    Toshiba-User

    pH meter (HI 2215, Hanna Instruments, USA). Melting point: The modified mucin powders were packed into a capillary tube sealed on one side and tapped on ..... Gautam, S; Ashoke, S; Sagar, P (2011). Grafted. Polysaccharides: Smart Materials of the Future,. Their Synthesis and Applications. In: Susheel K and Luc A (eds.) ...

  14. Norra LP-mudel ajab Eestis juuri / intervjueerinud Sirje Pärismaa

    Index Scriptorium Estoniae

    2016-01-01

    Teaduspõhise LP-mudeli (Learning environment and pedagogical analysis) - abivahendi koolikultuuri parandamiseks ja süsteemsemaks lähenemiseks tekkinud probleemidele - on kasutusele võtnud 10 kooli ja 3 lasteaeda. Norra hariduseksperdid Janne Stoen ja Hanna Jahnsen vastasid Õpetajate Lehe küsimustele

  15. Johan Bülows spade

    DEFF Research Database (Denmark)

    Knudsen, Karin Esmann

    2017-01-01

    practice. The paradise of the garden is the place of care (Robert Pugue Harrison 2008). This chapter examines how the ideas of vita activa (Hanna Arendt 1958) occur in the eighteenth century in 'how-to' gardening books and in the practice of the Danish garden enthusiast Johan Bülow, who created the garden...

  16. The Complexity of Evil and the Banalizing of the Un-forgivable

    DEFF Research Database (Denmark)

    Pedersen, Else Marie Wiberg

    2014-01-01

    Denne lederartikel problematiserer ved hjælp af Hanna Arendt den postmoderne filosofis begreb om en radikal ondskab, men problematiserer også Arendts begreb om ondskabens banalitet og spørger om ikke ondskab i en augustinsk forståelse som en mangel på det gode, privatio boni, er en kompleks...

  17. Access to Justice: Secondary School Strategies.

    Science.gov (United States)

    Khanlian, John F.; And Others

    1989-01-01

    John F. Khanlian, Ericka B. Gray and Sandi Dittrich offer a role playing activity on mediation. Jo Ellen Ambrose's and John Nelson's lessons deal with arbitration. Lowell Ueland's simulation is concerned with plea bargaining, and Jack Hanna's activity involves a discussion of lawyer responsibility to provide pro bono services. (KO)

  18. Discriminality of statistically independent Gaussian noise tokens and random tone-burst complexes

    NARCIS (Netherlands)

    Goossens, T.L.J.; Par, van de S.L.J.D.E.; Kohlrausch, A.G.; Kollmeier, B.; Klump, G.; Hohmann, V.; Langemann, U.; Mauermann, M.; Uppenkamp, S.; Verhey, J.

    2007-01-01

    Hanna (1984) has shown that noise tokens with a duration of 400 ms are harder to discriminate than noise tokens of 100 ms. This is remarkable because a 400-ms stimulus potentially contains four times as much information for judging dissimilarity than the 100-ms stimulus. Apparently, the ability to

  19. Sympathy for the Devil: Killing the Other in "Milk" and "The Reader"

    Science.gov (United States)

    Beck, Bernard

    2009-01-01

    Two recent, highly rated movies depict central characters who are involved in killing members of groups despised in their societies. In "Milk" and "The Reader," the characters of Dan White and Hanna Schmitz, respectively, are treated with empathy and a search for understanding. Their personal sufferings and confusions are highlighted, and the…

  20. Dipentyl Phthalate F1 Male rat necropsy data, requested by a mathematical statistician in NCEA

    Science.gov (United States)

    This is a dataset, and it has no abstract. See the manuscript for additional information. Gray LE Jr, Furr J, Tatum-Gibbs KR, Lambright C, Sampson H, Hannas BR, Wilson VS, Hotchkiss A, Foster PM. Establishing the "Biological Relevance" of DipentylPhthalate Reductions ...

  1. Assessment of phthalate-induced changes in fetal rat testis gene expression using an rt-PCR array

    Science.gov (United States)

    Lambright, CS’, Sampson, H2, Furr, i1, Evans, N’, Hannas, B’, Gray, LE, Jr.’, VS Wilson1. 1USEPA, NHEERL, RTP, NC, 2USEPA, NHEERL, RTP, NC, ORISE Fellow. Phthalate esters (PE) such as diethyl hexyl phthalate (DEHP) produce reproductive malformations in male rodents by reduction o...

  2. Recurrence risk of preterm birth in subsequent twin pregnancy after preterm singleton delivery

    NARCIS (Netherlands)

    Schaaf, J. M.; Hof, M. H. P.; Mol, B. W. J.; Abu-Hanna, A.; Ravelli, A. C. J.

    2012-01-01

    Please cite this paper as: Schaaf J, Hof M, Mol B, Abu-Hanna A, Ravelli A. Recurrence risk of preterm birth in subsequent twin pregnancy after preterm singleton delivery.BJOG 2012;119:16241629. Objective To determine the risk of preterm birth in a subsequent twin pregnancy after previous singleton

  3. Knowledge Management as a Mechanism for Technological and Organizational Change Management in Israeli Universities

    Science.gov (United States)

    Shoham, Snunith; Perry, Milly

    2009-01-01

    During the last decade, the higher education sector has experienced many pressures and changes (Hanna, "Educause Review, 38"(4), 25-34, 2003; Scott, "Educause Review, 38", 64-80, 2003; Waterhouse, "The power of e-learning: The essential guide for teaching in the digital age", 2005). Universities around the world are…

  4. NATO Enlargement and Democratic Control of the Armed Forces: The Experience of Poland and Implications for Neighboring "Partnership for Peace" Countries.

    Science.gov (United States)

    1998-03-01

    borders. You do not follow our suggestions, and we feel threatened...we are 88 See Hannah Arendt , "Reflections on the Hungarian Revolution," Journal of...Press, 1977). Arendt , Hanna, "Reflections on the Hungarian Revolution," Journal of Politics 20.1 (February 1958). Bebler, Anton A., "Postscript" in

  5. Papa Carlo teater filmitudengite moodi / Kairit Tsäro

    Index Scriptorium Estoniae

    Tsäro, Kairit, 1974-

    2002-01-01

    Concordia ülikooli ja TPÜ tudengid lõpetasid õppejõudude Ilmar Raagi ja Ian M. Fraseri juhendamisel kõmumeediat parodeeriva lühimängufilmi "Meie lemmikud". Stsenarist ja režissöör on Hanna Shein

  6. Euroopa majanduste andunud vikatimees Lars Christensen / Piret Reiljan

    Index Scriptorium Estoniae

    Reiljan, Piret, 1983-

    2007-01-01

    Danske Banki vanemanalüütik Lars Christensen on kahtluse alla seadnud Eesti valuutakomitee süsteemi püsimise. Vt. samas: Lars Christensen; Valik Lars Christenseni tänavusi hävitavaid hinnanguid Euroopa murelastele; Islandile kuulutatud häving kukutas otsemaid aktsiaid ja valuutat. Kommenteerivad Lars Rasmussen, Flemming Christensen ja Hanna Strandgaard

  7. Linn kui rikastav keskkond kultuuri peeglis / Sander Alfred Liivak

    Index Scriptorium Estoniae

    Liivak, Sander Alfred

    1999-01-01

    12.-13. VIII Tartu Ülikooli kunstide osakonna korraldatud rahvusvaheline seminar "Linnakultuur ja keskkonnakunst". Aasa Musta, Rein Veidemanni, Agnes Trump'i, Martti Preemi, Paulina Ahokase, Enn Siimeri, Raho Langsepa, Riitta Mänty, Irja Alakivi, Katriin Fischi, Hanna Johanssoni ettekannetest. Janna Syvänoja loomingust näidati videofilmi.

  8. Download this PDF file

    African Journals Online (AJOL)

    were significantly lower (P < 0.05) in the plots where calcium nitrate was ... complex outbreaks occurred in the 2008 / 9 growing season, causing huge economic .... analyzed in a 1:25 (wt:wt) water suspension with a pH meter (model Hanna ...

  9. Trocas gasosas de mudas de videira, obtidas por dois porta-enxertos, submetidas à deficiência hídrica Gas exchange of vine cuttings obtained from two graftings submitted to water deficiency

    Directory of Open Access Journals (Sweden)

    Claudia Rita de Souza

    2001-10-01

    Full Text Available Este trabalho teve como objetivo avaliar o efeito da deficiência hídrica e de dois porta-enxertos nas trocas gasosas de mudas de videira cultivadas em vasos, nas condições de casa de vegetação. Utilizou-se como copa a 'Niágara Rosada' (Vitis labrusca, e como porta-enxertos, o 101-14 (V. riparia e o 1103 Paulsen (V. rupestris x V. berlandieri. Doze dias após a suspensão da rega, o potencial hídrico foliar da combinação 'Niágara Rosada'/101-14 apresentou os menores valores (-2,80 MPa em relação à 'Niágara Rosada'/1103 Paulsen (-2,10 MPa nas plantas não-irrigadas, enquanto o teor relativo de água variou apenas entre os tratamentos hídricos. Com a evolução do estresse hídrico, houve uma sensível redução nas trocas gasosas da cultivar 'Niágara Rosada', que apresentaram valores próximos de zero, devido ao fechamento dos estômatos, sem diferenças entre os porta-enxertos. Somente após 12 dias sem rega, os porta-enxertos influenciaram a eficiência no uso da água e eficiência fotoquímica do fotossistema II, onde a 'Niágara Rosada' enxertada sobre o 101-14 apresentou valores inferiores ao 1103 Paulsen. Entretanto, durante o período de suspensão da rega, os porta-enxertos não influenciaram as trocas gasosas da cultivar 'Niágara Rosada', e apresentaram comportamento semelhante em condições de baixa disponibilidade hídrica.The present work aimed to evaluate the water deficiency effect and two graftings on the gas exchange of vine cuttings under greenhouse conditions. 'Niágara Rosada' (Vitis labrusca was used as scion, and 101-14 (V. riparia x V. rupestris and 1103 Paulsen (V. rupestris x V. berlandieri were used as rootstocks. Twelve days after watering suspension, the leaf water potential of the combination 'Niágara Rosada'/101-14 showed lower (-2.80 MPa in relation to 'Niágara Rosada'/1103 Paulsen (-2.10 MPa in the non-irrigated plants, while relative water content altered only among watering levels. With the

  10. "August 1991" - film ajaloost ja teletöötajaist / Sergo Selder

    Index Scriptorium Estoniae

    Selder, Sergo

    2005-01-01

    Eesti Televisiooni fiktiivne dokumentaaldraama "August 1991" : stsenarist ja režissöör Ilmar Raag : produtsent Gerda Kordemets : operaator Janno-Hans Arro. "Prototüübid" Enn Eesmaa ja Andres Raid kommenteerivad endi ja kolleegide kujutamist filmis

  11. Techniques to distinguish between electron and photon induced events using segmented germanium detectors

    International Nuclear Information System (INIS)

    Kroeninger, K.

    2007-01-01

    Two techniques to distinguish between electron and photon induced events in germanium detectors were studied: (1) anti-coincidence requirements between the segments of segmented germanium detectors and (2) the analysis of the time structure of the detector response. An 18-fold segmented germanium prototype detector for the GERDA neutrinoless double beta-decay experiment was characterized. The rejection of photon induced events was measured for the strongest lines in 60 Co, 152 Eu and 228 Th. An accompanying Monte Carlo simulation was performed and the results were compared to data. An overall agreement with deviations of the order of 5-10% was obtained. The expected background index of the GERDA experiment was estimated. The sensitivity of the GERDA experiment was determined. Special statistical tools were developed to correctly treat the small number of events expected. The GERDA experiment uses a cryogenic liquid as the operational medium for the germanium detectors. It was shown that germanium detectors can be reliably operated through several cooling cycles. (orig.)

  12. Cryogenic readout techniques for germanium detectors

    Energy Technology Data Exchange (ETDEWEB)

    Benato, G. [University of Zurich, (Switzerland); Cattadori, C. [INFN - Milano Bicocca, (Italy); Di Vacri, A. [INFN LNGS, (Italy); Ferri, E. [Universita Milano Bicocca/INFN Milano Bicocca, (Italy); D' Andrea, V.; Macolino, C. [GSSI/INFN LNGS, (Italy); Riboldi, S. [Universita degli Studi di Milano/INFN Milano, (Italy); Salamida, F. [Universita Milano Bicocca/INFN Milano Bicocca, (Italy)

    2015-07-01

    High Purity Germanium detectors are used in many applications, from nuclear and astro-particle physics, to homeland security or environment protection. Although quite standard configurations are often used, with cryostats, charge sensitive amplifiers and analog or digital acquisition systems all commercially available, it might be the case that a few specific applications, e.g. satellites, portable devices, cryogenic physics experiments, etc. also require the development of a few additional or complementary techniques. An interesting case is for sure GERDA, the Germanium Detector Array experiment, searching for neutrino-less double beta decay of {sup 76}Ge at the Gran Sasso National Laboratory of INFN - Italy. In GERDA the entire detector array, composed of semi-coaxial and BEGe naked crystals, is operated suspended inside a cryostat filled with liquid argon, that acts not only as cooling medium and but also as an active shield, thanks to its scintillation properties. These peculiar circumstances, together with the additional requirement of a very low radioactive background from all the materials adjacent to the detectors, clearly introduce significant constraints on the design of the Ge front-end readout electronics. All the Ge readout solutions developed within the framework of the GERDA collaboration, for both Phase I and Phase II, will be briefly reviewed, with their relative strength and weakness compared together and with respect to ideal Ge readout. Finally, the digital processing techniques developed by the GERDA collaboration for energy estimation of Ge detector signals will be recalled. (authors)

  13. Pulse shape analysis of enriched BEGe detectors in vacuum cryostat and liquid argon

    Energy Technology Data Exchange (ETDEWEB)

    Wagner, Victoria [Max-Planck-Institut fuer Kernphysik, Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    The Gerda experiment searches for the lepton number violating neutrinoless double beta (0νββ) decay of {sup 76}Ge. Germanium diodes of BEGe type (Canberra, Belgium) made from isotopically modified material have been procured for Phase II of Gerda. They will improve the sensitivity of the experiment by additional target mass, improved energy resolution and enhanced pulse shape discrimination (PSD) against background events. The PSD efficiencies of the new enriched BEGe detectors were studied in vacuum cryostats as part of the characterization campaign at the HADES underground laboratory. For a deeper understanding of the pulse shape performance of the enriched BEGe detectors, detailed {sup 241}Am surface scans were performed. Unexpectedly high position-dependence of the pulse shape parameter Amplitude-over-Energy was found for some of the detectors. With further investigation this effect was traced to surface charge effects specific to the operational configuration of the detectors inside the vacuum cryostats. The standard behavior is restored when they are operated in liquid argon in the configuration intended for Gerda Phase II. Finally, five of the enriched BEGe diodes were installed in the Gerda liquid argon cryostat prior to the full upgrade. They show a good performance and are able to reject efficiently multi-site-events as well as β- and α-particles.

  14. Antitrypanosomal isoflavan quinones from Abrus precatorius

    CSIR Research Space (South Africa)

    Hata, Y

    2014-03-01

    Full Text Available Fitoterapia Vol. 93, pp 81-87 Antitrypanosomal isoflavan quinones from Abrus precatorius Yoshie Hata a,d, Samad Nejad Ebrahimi a,e, Maria De Mieri a, Stefanie Zimmermann a, Tsholofelo Mokoka c, Dashnie Naidoo c, Gerda Fouche c, Vinesh Maharaj c...

  15. [Patch testing: historical aspects].

    Science.gov (United States)

    Lachapelle, J-M

    2009-01-01

    This article reviews the key points in the history of patch testing, which spans more than a century, starting with the first description of the method by J. Jadassohn in 1895. Special attention is paid to the contribution of French schools in this field, which led to the foundation of the Groupe d'études et de recherches en dermato-allergologie (GERDA).

  16. Semiconductor-based experiments for neutrinoless double beta decay search

    International Nuclear Information System (INIS)

    Barnabé Heider, Marik

    2012-01-01

    Three experiments are employing semiconductor detectors in the search for neutrinoless double beta (0νββ) decay: COBRA, Majorana and GERDA. COBRA is studying the prospects of using CdZnTe detectors in terms of achievable energy resolution and background suppression. These detectors contain several ββ emitters and the most promising for 0νββ-decay search is 116 Cd. Majorana and GERDA will use isotopically enriched high purity Ge detectors to search for 0νββ-decay of 76 Ge. Their aim is to achieve a background ⩽10 −3 counts/(kg⋅y⋅keV) at the Q improvement compared to the present state-of-art. Majorana will operate Ge detectors in electroformed-Cu vacuum cryostats. A first cryostat housing a natural-Ge detector array is currently under preparation. In contrast, GERDA is operating bare Ge detectors submerged in liquid argon. The construction of the GERDA experiment is completed and a commissioning run started in June 2010. A string of natural-Ge detectors is operated to test the complete experimental setup and to determine the background before submerging the detectors enriched in 76 Ge. An overview and a comparison of these three experiments will be presented together with the latest results and developments.

  17. Techniques to distinguish between electron and photon induced events using segmented germanium detectors

    Energy Technology Data Exchange (ETDEWEB)

    Kroeninger, K.

    2007-06-05

    Two techniques to distinguish between electron and photon induced events in germanium detectors were studied: (1) anti-coincidence requirements between the segments of segmented germanium detectors and (2) the analysis of the time structure of the detector response. An 18-fold segmented germanium prototype detector for the GERDA neutrinoless double beta-decay experiment was characterized. The rejection of photon induced events was measured for the strongest lines in {sup 60}Co, {sup 152}Eu and {sup 228}Th. An accompanying Monte Carlo simulation was performed and the results were compared to data. An overall agreement with deviations of the order of 5-10% was obtained. The expected background index of the GERDA experiment was estimated. The sensitivity of the GERDA experiment was determined. Special statistical tools were developed to correctly treat the small number of events expected. The GERDA experiment uses a cryogenic liquid as the operational medium for the germanium detectors. It was shown that germanium detectors can be reliably operated through several cooling cycles. (orig.)

  18. Indigenous edible plants as sources of nutrients and health benefitting components (nutraceuticals)

    CSIR Research Space (South Africa)

    Dlamini, N

    2010-08-31

    Full Text Available Africa, not only to address health problems and malnutrition, but also to create employment through establishment of industries © CSIR 2010 Slide 21 The Team at CSIR Tshidi Moroka Nomusa Dlamini Gerda Botha Judy Reddy Lauraine Mlotshwa Middah...

  19. Valik konkursi "Noored poeedid 2009" alapealkirjaga "See on rõõm elust endast" tunnustust pälvinud töödest : [luuletused

    Index Scriptorium Estoniae

    2009-01-01

    Vanem vanuseaste 1. koht Triin Sepp, 2. koht Triinu Ansper, 3.-4. koht Kairi Sepp ja Heli Armus. Keskmine vanuseaste 1. koht Annaliis Lehto, 2. koht Liina Salonen, 3. koht Gerda-Liis Palmiste. Noorem vanuseaste 1. koht Reet Rüütel, 2. koht Diana Kasesalu, 3. koht Eliis Mets

  20. Bruno 2016 / Karin Paulus

    Index Scriptorium Estoniae

    Paulus, Karin, 1975-

    2016-01-01

    Valik disainiauhinnale Bruno 2016 kandideerivatest esemetest (Gerda Retter "Jääkideta nahadisain", Raul Abner "Kummut Mix", Argo Ader ja Rain Aduson "Fitbi - spordi mugavalt!", Merili Sulg "Seinašabloon Kasemets", Rita Assor "Lugemispesa-mänguala Aas", Mare Kelpman "Terra pleedid", Henri Viljarand "Vineervalamu Gniss")

  1. The impact of telecommuting on the division of labour in the domestic setting

    NARCIS (Netherlands)

    Casimir, G.J.

    2001-01-01

    When people start working at home, it is plausible that the division of labour within the home will change, in particular the division between men and women. Gerda Casimir studied these changes, by analysing the results of an Internet survey, to which 171 respondents reacted. The core of

  2. Teadlased loovad laboris narkokoera tehisnina / Vilja Kohler

    Index Scriptorium Estoniae

    Kohler, Vilja, 1966-

    2004-01-01

    Bionina projekti kallal on 2000. aastast töötanud Tartu Ülikooli kolloid- ja keskkonnakeemia õppetooli teadur filosoofiadoktor Toonika Rinken, Tartu Ülikooli orgaanilise ja bioorgaanilise keemia instituudi teadlased professor Ago Rinken ja teadur Gerda Raidaru. Samas ka: Maailma levinuim biosensor aitab suhkruhaigeid. Lisa: Biosensor kopeerib meeleelundeid

  3. Obituaries and biographical notes

    NARCIS (Netherlands)

    NN,

    1985-01-01

    AMSHOFF, Ms. Dr. Gerda Jane Hillegonda (5 January 1913 — 10 February 1985) Ms. Amshoff studied biology at the State University of Utrecht. Her Ph.D. thesis was on the Leguminosae of Surinam. In later years she was attached to the Agricultural College of Wageningen and worked as a staffmember of WAG,

  4. Videira 'Syrah' sobre diferentes porta-enxertos em ciclo de inverno no sul de Minas Gerais

    Directory of Open Access Journals (Sweden)

    Frederico Alcântara Novelli Dias

    2012-02-01

    Full Text Available O objetivo deste trabalho foi avaliar a influência de porta-enxertos sobre as características agronômicas, ecofisiológicas e qualitativas da videira 'Syrah' manejada por meio da técnica da dupla poda. As videiras foram enxertadas nos porta-enxertos 'SO4', '110 Richter' e '1103 Paulsen', e sustentadas em sistema espaldeira sem irrigação. Foram avaliadas as características ecofisiológicas, de produção e de composição físico-química das bagas maduras em três safras (2007, 2008 e 2010. Os porta-enxertos não exerceram influência sobre o potencial hídrico de base, que apresentou valores próximos a -0,2 MPa, o que indica que não houve restrição hídrica no solo ao final da maturação (junho. Também não houve diferença significativa quanto à produção. O porta-enxerto '1103 Paulsen' conferiu menor vigor, menor taxa fotossintética e melhores resultados de maturação, para as safras com menores precipitações. Os porta-enxertos '110 Richter' e 'SO4' apresentaram maior vigor nas condições meteorológicas de 2010 e as maiores taxas fotossintéticas para o mesmo período. As condições meteorológicas tiveram efeito significativo na maturação tecnológica e fenólica, com os melhores resultados para os anos mais secos. O porta-enxerto '1103 Paulsen' fornece melhor equilíbrio entre vigor e produção, o que aumenta a qualidade da uva.

  5. Efeito do porta-enxerto no teor de nutrientes em tecidos da videira "cabernet sauvignon"

    OpenAIRE

    Miele,Alberto; Rizzon,Luiz Antenor; Giovannini,Eduardo

    2009-01-01

    A nutrição mineral da videira constitui-se em importante fator para a qualidade dos vinhos. Devido a isso, avaliou-se o efeito de porta-enxertos no teor de nutrientes em diferentes tecidos da videira 'Cabernet Sauvignon' (Vitis vinifera L.) na Serra Gaúcha. o experimento foi conduzido durante o ciclo vegetativo de 2004/2005, com os porta-enxertos Rupestris du lot, 101-14, 3309, 420A, Kober 5BB, 161-49, So4 e Paulsen 1103, enxertados em 1993 com a cv. 'Cabernet Sauvignon'. o delineamento exper...

  6. Effect of rootstock on nutrient content of 'cabernet sauvignon' grapevine tissues

    OpenAIRE

    Miele, Alberto; Rizzon, Luiz Antenor; Giovannini, Eduardo

    2009-01-01

    A nutrição mineral da videira constitui-se em importante fator para a qualidade dos vinhos. Devido a isso, avaliou-se o efeito de porta-enxertos no teor de nutrientes em diferentes tecidos da videira 'Cabernet Sauvignon' (Vitis vinifera L.) na Serra Gaúcha. o experimento foi conduzido durante o ciclo vegetativo de 2004/2005, com os porta-enxertos Rupestris du lot, 101-14, 3309, 420A, Kober 5BB, 161-49, So4 e Paulsen 1103, enxertados em 1993 com a cv. 'Cabernet Sauvignon'. o delineamento exper...

  7. Inhibitory effects of copper on marine dinoflagellates

    Energy Technology Data Exchange (ETDEWEB)

    Saifullah, S.M.

    1978-01-01

    The effect of copper on three species of marine dinoflagellates (Scrippsiella faeroense (Paulsen) Balech et Soares, Prorocentrum micans Ehrenberg, Gymnodinium splendens Lebour) was studied. It inhibited the growth of all species and was lethal to one species in batch cultures. The effect was more pronounced in semicontinuous culture than in batch cultures. Chlorophyll concentrations and rate of uptake of radioactive carbon by cells of S. faeroense were affected in a manner similar to cell numbers. Copper inhibited growth of cells, most probably either by arresting cell division or by penetrating inside the cell and affecting metabolism.

  8. Bildung in the Digital Medium Environment

    DEFF Research Database (Denmark)

    Tække, Jesper; Paulsen, Michael Eric

    We are living in a period where new social structures arise in the communicative space and wake of digital media. This means that we must try to adapt to a changing social world within all social arenas like economy, work-life, love relations and last but not least education. The question...... in education today and tomorrow. The paper draws on empirical findings from the Socio Media Education experiment, a Danish action research project in an upper secondary school from 2011-214 (Tække & Paulsen 2013a, 2015a, 2016a, 2016b)....

  9. From Analog to Digital Medias in Early Childhood Education

    DEFF Research Database (Denmark)

    Brandt, Erika Zimmer

    2015-01-01

    Research aims: The aim of the study is to explore how the encounters between children and their educators alter when the media changes from analog to digital. Relationship to previous research works Tablets and other handheld, electronic devices has become part of everyday life in kindergartens....... Research shows that there are both potential pedagogical difficulties and possibilities connected to using digital media (ex. Thestrup 2015, Tække and Paulsen 2014) Theoretical and conceptual framework: The study is a single case study of an educational experiment (Flyvbjerg 2006). It is carried out...

  10. La muerte de eduardo spranger

    OpenAIRE

    Jaramillo Uribe, Jaime

    2011-01-01

    En la ciudad de Tübingen, en cuya antigua universidad enseñaba desde1946, falleció, recientemente, el filosofo Eduardo Spranger. Nacido enBerlín en el año de 1882, hizo sus primeros estudios filosóficos en suciudad natal bajo la dirección de Guillermo Dilthey y Federico Paulsen.Muy joven, en 1912 fue nombrado profesor ordinario de filosofía en launiversidad de Leipzig, de donde paso de nuevo a la capital alemana para desempeñar la cátedra de pedagogía en la universidad Alejandro de Humboldt d...

  11. 80 aastat tagasi : Jaanuar 1928 / Mati Märtin

    Index Scriptorium Estoniae

    Märtin, Mati

    2008-01-01

    Muusikasündmustest 80 aastat tagasi: Noorte Meeste Kristliku Ühing andis loengkontserte, Tallinna Kaarli kirikus tuli ettekandele A.Dvoraki "Stabat Mater" (juhatas Johannes Paulsen, esinesid Jekeli lauluselts, Estonia sümfooniaorkester ja solistid Olga Torokoff-Tiedeberg, J. Badendiesk-Inger, Arnold Vissmann ja Karl Viitol), trükist ilmus Johannes Jürgensoni (Juhan Jürme) "12 vaimulikku laulu" (kirjastajaks Tallinna Kaarli Lauluselts), 50. surma-aastapäeva puhul meenutati kirikumuusikut Johann August Hagenit, meenutati Keila muusikameest Jakob Maabergi

  12. Flown The Nest

    OpenAIRE

    Sebbane, Nathalie

    2012-01-01

    Lorsque le quotidien régional, The Champion, commence à publier Flown The Nest en 1972 sous forme d’épisodes, Bird’s Nest Soup est déjà en vente, et la troisième partie de l’autobiographie d’Hanna, Housekeeper At Large, est sous presse. L’édition de 2009 contient Flown The Nest et Housekeeper at Large. Dans Bird’s Nest Soup, Hanna Greally racontait les dix-huit années de sa vie passées au sein d’un hôpital psychiatrique. Les raisons pour lesquelles elle y avait été enfermée, à la demande de s...

  13. Effects of intravenous ketamine in a patient with post-treatment Lyme disease syndrome

    Directory of Open Access Journals (Sweden)

    Hanna AF

    2017-08-01

    Full Text Available Ashraf F Hanna, Bishoy Abraham, Andrew Hanna, Adam J Smith Department of Pain Management, Florida Spine Institute, Clearwater, FL, USA Abstract: Post-treatment Lyme disease syndrome (PTLDS is a pain disorder for which there remains no gold standard treatment option. Here, we report a case of PTLDS in a female patient whose pain was refractory to treatment options such as radiofrequency ablation, vitamin infusion therapy, opioid analgesics, and other pharmacotherapies. The patient commenced an experimental intravenous ketamine infusion therapy at the Florida Spine Institute (Clearwater, FL, USA and achieved relief from her chronic pain, an improved quality of life, reduced depression and suicidal ideation, and reduced opioid consumption. Keywords: chronic Lyme, late Lyme, pain, analgesic, suicidality, depression

  14. VAT-teater vaatab 30 aastat tulevikku / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    VAT Teater toob S. Becketti "Krappi viimase lindi" lavale ebatavalisel moel. Festivalil "Draama 2010" Tartus toimub 8. septembril esimene avalik lindistus "...viimane lint / Saare esimene lint". Kontseptsioon: Tanel Saar ja Co. Esitus: Tanel Saar ja Hanna Allsaar. Näitejuhid-konsultandid: Rait Avestik ja Aare Toikka. "Krappi viimane lint" esietendub VAT Teatri ja Tanel Saare esituses 2040. a. sügisel. Festivali "Draama 2010" kavast

  15. Soldier Beliefs about the Readiness of Military Personnel with Mild Traumatic Brain Injury

    Science.gov (United States)

    2014-05-19

    Those who suffer an mTBI may experience neuropsychological difficulties following the injury lasting typically a few days to a few weeks (Hanna... Schizophrenia Bulletin. 30: 511-541. MacGregor, A. J., Shaffer, R. A., Dougherty, A. L., Galarneau, M. R., Raman, R., et al. 2010. Prevalence and...Journal of the International Neuropsychological Society. 16: 705- 710. Mittal, D., Drummond, K. L., Blevins, D., Curran, G. C., Corrigan, P., and

  16. Annual Reports of Education, Health and Sport 9781329899971

    OpenAIRE

    Meshcheryakova, A. V. et al.

    2013-01-01

    Radomska Szkoła Wyższa w Radomiu Radom University in Radom Annual Reports of Education, Health and Sport 9781329899971 Edited by Iwona Czerwińska Pawluk Radosław Muszkieta Hanna Żukowska Wiesława Pilewska Mariusz Klimczyk Walery Zukow http://ojs.ukw.edu.pl/index.php/johs/index http://journal.rsw.edu.pl https://pbn.nauka.gov.pl/search?search&searchCategory...

  17. Characterization of substances in products, effluents, and wastes from coal conversion processes

    International Nuclear Information System (INIS)

    Petersen, M.R.

    1978-01-01

    Researchers at Pacific Northwest Laboratory (PNL) are investigating materials from synthetic fossil fuel processes. During the past year, samples have been collected from the Solvent Refining Coal Pilot Plant (SRC-I mode), Lignite Gasification Pilot Plant, Eyring Research Institute Gasifier, and Hanna III In Situ Coal Gasification Experiment. Inorganic and organic analyses have been performed, and comparisons of the data show some important differences in the potential emissions

  18. Long-term efficacy of adalimumab in the treatment of uveitis associated with juvenile idiopathic arthritis

    OpenAIRE

    Kotaniemi, Kaisu; S?il?, Hanna; Kautiainen, Hannu

    2011-01-01

    Kaisu Kotaniemi1,2, Hanna Säilä2, Hannu Kautiainen31Helsinki University Hospital, Helsinki, Finland; 2Orton Orthopaedic Hospital and Rehabilitation Unit, Helsinki, Finland; 3Unit of Primary Health Care, Kuopio University Hospital, Kuopio, FinlandBackground: The purpose of this study was to investigate the long-term effects of adalimumab, a tumor necrosis factor alpha antagonist, in the treatment of uveitis associated with juvenile idiopathic arthritis.Methods: Adalimumab was...

  19. Alkane and polycyclic aromatic hydrocarbons in sediments and benthic invertebrates of the northern Chukchi Sea

    Science.gov (United States)

    Harvey, H. Rodger; Taylor, Karen A.

    2017-10-01

    The Hanna Shoal region represents an important northern gateway for transport and deposition in the Chukchi Sea. This study determined the concentration and distribution of organic contaminants (aliphatic hydrocarbon and polycyclic aromatic hydrocarbons, PAHs) in surface sediments from 34 sites across Hanna Shoal. Up to 31 total PAHs, including parent and alkyl homologues were detected with total concentrations ranging from a low of 168 ng g-1 the western flank of Hanna Shoal (station H34) to 1147 ng g-1 at station in Barrow Canyon (station BarC5). Alkyl PAHs were more abundant than parent structures and accounted for 53-64% of the summed concentrations suggesting overall at background levels (< 1600 ng g-1) in sediments. Alkane (C15-C33) hydrocarbons ranged from 4.3 μg g-1 on the southern flank of Hanna shoal to 31 μg g-1 at a northern station. Sediments were often dominated by short chain (C15-C22) alkanes with overall terrestrial aquatic ratios (TAR) for the region averaging 0.20. Based on the ratio of Fl/(Fl+ Py) and BaF/(Baf+BeP) verses (BA/BA+Ch) in sediments, PAHs are largely derived from petrogenic sources with minor amounts of mixed combustion sources. A diversity of PAHs were detected in the northern whelk Neptunea heros foot muscle with total concentrations ranging from 0.14 to 1.5 μg g-1 dry tissue wt. Larger (and presumably older) animals showed higher levels of PAH per unit muscle tissue, suggesting that animals may bioaccumulate PAHs over time, with low but increasing concentrations also present in internal and external eggs. Alkane hydrocarbons were also higher in whelks with distributions similar to that seen in sediments. The mussel Muscularus discors collected in Barrow Canyon showed constrained distributions and substantially lower concentrations of both PAHs and alkanes than the surrounding surface sediments.

  20. Annual Reports of Education, Health and Sport 9781329900578

    OpenAIRE

    Szark-Eckardt, Mirosława et al.

    2014-01-01

    Radomska Szkoła Wyższa w Radomiu Radom University in Radom Annual Reports of Education, Health and Sport 9781329900578 Edited by Iwona Czerwińska Pawluk Jan Falkowski Hanna Żukowska Mirosława Szark-Eckardt Wiesława Pilewska Walery Zukow http://ojs.ukw.edu.pl/index.php/johs/index http://journal.rsw.edu.pl https://pbn.nauka.gov.pl/search?search&searchCategory=WOR...

  1. Medical Countermeasure Models. Volume 4. Francisella tularensis

    Science.gov (United States)

    2013-04-12

    abscess complicating ulceroglandular tularemia." Canadian Medical Association Journal. 129(12). 1983. 191 Hanna C and Lyford J. "Tularemia...administration of another antibiotic (TMP/SMX) 3 3 Lung infiltrate Cefazolin 6 7 Streptomycin 13 7 Relapsed 1 week after therapy with a...course. 1 patient was not treated with antibiotics and subsequently died. 2 46 Lung infiltrates Isoniazid Streptomycin 3 11

  2. Annual Reports of Education, Health and Sport 9781329900585

    OpenAIRE

    Tomczykowska, Paulina et al.

    2014-01-01

    Radomska Szkoła Wyższa w Radomiu Radom University in Radom Annual Reports of Education, Health and Sport 9781329900585 Edited by Iwona Czerwińska Pawluk Jan Falkowski Hanna Żukowska Mirosława Szark-Eckardt Wiesława Pilewska Walery Zukow http://ojs.ukw.edu.pl/index.php/johs/index http://journal.rsw.edu.pl https://pbn.nauka.gov.pl/search?search&searchCategory=WOR...

  3. Libraries: A Vision for the 90’s and Beyond. Proceedings of the Military Librarians Workshop (34th Annual), October 9-12, 1990

    Science.gov (United States)

    1991-01-08

    University, is such a system. MDX diagnoses tho existence and cause of the liver syndrome known as "cholestasis." It banieo Its diagnosis on patient history...and Gretchen Cheung. Nonvoting members present were: Marcia Hanna and Paul Klinefelter . Also present were: Gary Walter, Kathryn Marshall, James Byrn... Klinefelter who is optimistic that the project can be renlized. All past Hosts of MLW should be contacted for their memoirs. It was hoped to publish

  4. Being There is Only the Beginning: Toward More Effective Web 2.0 Use in Academic Libraries

    Science.gov (United States)

    2010-01-02

    Google is Our Friend,” and “ Plagiarism 101.” Also unlike the hard-to-find blogs, many academic libraries, including both Hollins University and Urbana...Effective Web 2.0 Use in Academic Libraries by Hanna C. Bachrach Pratt Institute...5a. CONTRACT NUMBER 2.0 Use in Academic Libraries 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) Bachrach

  5. Tallinna XIII graafikatriennaali grand prix' pälvis leedu graafik Egle Kuckaite

    Index Scriptorium Estoniae

    2004-01-01

    Kolm võrdset preemiat: Sang-gon Chung Lõuna-Koreast, Krishs Salmanis Lätist ja Joanne Soroka Shotimaalt. Diplomid: Anonymous Boh ja Eve Kiiler Eestist, Pete Nevin Inglismaalt, Hanna Oinonen Soomest ja venetsueela-soome kunstnik Sandra Vina de Karila. Tallinna linna preemia: John Smith (Marko Mäetamm & Kaido Ole) Eestist. Eesti Kunstimuuseumi preemia: Markus Lampinen Soomest. Eesti Panga preemia: Leonards Laganovskis Lätist

  6. Communications Middleware for Tactical Environments: Observations, Experiences, and Lessons Learned

    Science.gov (United States)

    2009-12-12

    posi- tion at the Engineering Department of the University of Ferrara , Italy . His research interests include distributed and mobile computing, QoS...science engineering from the Uni- versity of Padova, Italy , in 2005. She continued her studies at the University of Ferrara , where she gained a Master’s...Stefanelli, University of Ferrara Jesse Kovach, U.S. Army Research Laboratory James Hanna, U.S. Air Force Research Laboratory Communications Middleware

  7. Tibial Bowing and Pseudarthrosis in Neurofibromatosis Type 1

    Science.gov (United States)

    2015-01-01

    exposed to the vector. Larry Sherman (Oregon Health and Science University) dis- cussed the underlyingmechanisms of pain in schwannomatosis.He...Sequence reads were mapped using the Burrow -Wheeler aligner (9) and final alignments generated after multiple quality controls steps applied using...Li H, Durbin R. Fast and accurate short read alignment with Burrows -Wheeler transform. Bioinformatics 2009;25(14):1754-60. 10. McKenna A, Hanna M

  8. Annual Reports of Education, Health and Sport 9781329900561

    OpenAIRE

    Pleshko, E A. et al.

    2014-01-01

    Radomska Szkoła Wyższa w Radomiu Radom University in Radom Annual Reports of Education, Health and Sport 9781329900561 Edited by Iwona Czerwińska Pawluk Jan Falkowski Hanna Żukowska Wiesława Pilewska Walery Zukow http://ojs.ukw.edu.pl/index.php/johs/index http://journal.rsw.edu.pl https://pbn.nauka.gov.pl/search?search&searchCategory=WORK&filter.inJournal=49068 ...

  9. Active volume studies with depleted and enriched BEGe detectors

    Energy Technology Data Exchange (ETDEWEB)

    Sturm, Katharina von [Eberhard Karls Universitaet Tuebingen (Germany); Universita degli Studi di Padova, Padua (Italy); Collaboration: GERDA-Collaboration

    2013-07-01

    The Gerda experiment is currently taking data for the search of the 0νββ decay in {sup 76}Ge. In 2013, 30 newly manufactured Broad Energy Germanium (BEGe) diodes will be deployed which will double the active mass within Gerda. These detectors were fabricated from high-purity germanium enriched in {sup 76}Ge and tested in the HADES underground laboratory, owned by SCK.CEN, in Mol, Belgium. As the BEGes are source and detector at the same time, one crucial parameter is their active volume which directly enters into the evaluation of the half-life. This talk illustrates the dead layer and active volume determination of prototype detectors from depleted germanium as well as the newly produced detectors from enriched material, using gamma spectroscopy methods and comparing experimental results to Monte-Carlo simulations. Recent measurements and their results are presented, and systematic effects are discussed.

  10. Study of pulse shapes in Ge detectors with PET

    Energy Technology Data Exchange (ETDEWEB)

    Grabmayr, Peter; Hegai, Alexander; Jochum, Josef; Schmitt, Christopher; Schuetz, Ann-Kathrin [Eberhard Karls Univeritaet Tuebingen (Germany); Collaboration: GERDA-Collaboration

    2016-07-01

    The Gerda collaboration aims to determine the half life of the neutrinoless double beta decay (0νββ) of {sup 76}Ge. For Phase II Gerda wants to reduce the background contribution significantly by active background-suppression techniques. One of such techniques is the pulse shape analysis of signals induced by the interaction of radiation with the detector. The pulse shapes depend not only on the energy of the interacting gamma, the geometry and field configuration but also on the location of interaction in the crystal. The waveform and the location of the interaction in the germanium can be determined by positron-emission-tomography (PET). First results of this novel pulse shape study with the PET will be presented in this talk.

  11. Double Beta Decay Experiments: Present Status and Prospects for the Future

    Science.gov (United States)

    Barabash, A. S.

    The review of modern experiments on search and studying of double beta decay processes is done. Results of the most sensitive current experiments are discussed. The main attention is paid to EXO-200, KamLAND-Zen, GERDA-I and CUORE-0 experiments. Modern values of T1/2(2ν) and best present limits on neutrinoless double beta decay and double beta decay with Majoron emission are presented. Conservative limits on effective mass of a Majorana neutrino ( at the level of ˜ (0.01-0.1) eV are discussed. The main attention is paid to experiments of CUORE, GERDA, MAJORANA, EXO, KamLAND-Zen-2, SuperNEMO and SNO+. Possibilities of low-temperature scintillating bolometers on the basis of inorganic crystals (ZnSe, ZnMoO4, Li2MoO4, CaMoO4 and CdWO4) are considered too.

  12. Wavelength shifting reflector foils for liquid Ar scintillation light

    Energy Technology Data Exchange (ETDEWEB)

    Walter, Manuel [Physik Institut, Universitaet Zuerich (Switzerland); Collaboration: GERDA-Collaboration

    2013-07-01

    Liquid argon is used as a scintillator in several present and upcoming experiments. In Gerda it is used as a coolant, shielding and will be instrumented to become an active veto in Phase II. Its scintillation light has a wavelength of 128 nm, that gets absorbed by quartz. In order to measure the light using photo multiplier tubes (PMT) for cryogenic temperatures which have a quartz window, it is converted to longer wavelength by coated reflector foils. The conversion efficiency and stability of several such coatings was optimized using VM2000 and Tetratex separately as reflector foils. The efficiency has been measured in a liquid Ar set up build especially for this purpose. It employs a 3'' low radioactivity PMT of type R11065-10 from Hamamatsu, the favorite photo sensor candidate to be used in Gerda.

  13. Computational studies of BEGe detectors

    Energy Technology Data Exchange (ETDEWEB)

    Salathe, Marco [Max Planck Institut fuer Kernphysik, Heidelberg (Germany)

    2013-07-01

    The GERDA experiment searches for the neutrinoless double beta decay within the active volume of germanium detectors. Simulations of the physical processes within such detectors are vital to gain a better understanding of the measurements. The simulation procedure follows three steps: First it calculates the electric potential, next it simulates the electron and hole drift within the germanium crystal and finally it generates a corresponding signal. The GERDA collaboration recently characterized newly produced Broad Energy Germanium Detectors (BEGe) in the HADES underground laboratory in Mol, Belgium. A new pulse shape simulation library was established to examine the results of these measurements. The library has also proven to be a very powerful tool for other applications such as detector optimisation studies. The pulse shape library is based on ADL 3.0 (B. Bruyneel, B. Birkenbach, http://www.ikp.uni-koeln.de/research/agata/download.php) and m3dcr (D. Radford, http://radware.phy.ornl.gov/MJ/m3dcr).

  14. Susiseb ja podiseb I-II / Mihkel Mutt

    Index Scriptorium Estoniae

    Mutt, Mihkel, 1953-

    1998-01-01

    Järg: 27. märts. 1998. a. riigi kultuuripreemiate jagamisest; Eesti Draamateatrist. Vastukajad: Kasterpalu, Margus. Marutõbine teatripäev // Postimees (1998) 30. märts, lk. 15; Aarma, Jüri. Kolm tähelepanekut susisemise ja podisemise asjus // Sõnumileht (1998) 18. apr., lk. 15; Kordemets, Gerda. Pind põues või palk silmas // Sõnumileht (1998) 18. apr., lk. 15

  15. NDM06: 2. symposium on neutrinos and dark matter in nuclear physics

    Energy Technology Data Exchange (ETDEWEB)

    Akerib, D; Arnold, R; Balantekin, A; Barabash, A; Barnabe, H; Baroni, S; Baussan, E; Bellini, F; Bobisut, F; Bongrand, M; Brofferio, Ch; Capolupo, A; Enrico, Carrara; Caurier, E; Cermak, P; Chardin, G; Civitarese, O; Couchot, F; Kerret, H de; Heros, C de los; Detwiler, J; Dracos, M; Drexlin, G; Efremenko, Y; Ejiri, H; Falchini, E; Fatemi-Ghomi, N; Finger, M Ch; Finger Miroslav, Ch; Fiorillo, G; Fiorini, E; Fracasso, S; Frekers, D; Fushimi, K I; Gascon, J; Genest, M H; Georgadze, A; Giuliani, A; Goeger-Neff, M; Gomez-Cadenas, J J; Greenfield, M; H de Jesus, J; Hallin, A; Hannestad, St; Hirai, Sh; Hoessl, J; Ianni, A; Ieva, M B; Ishihara, N; Jullian, S; Kaim, S; Kajino, T; Kayser, B; Kochetov, O; Kopylov, A; Kortelainen, M; Kroeninger, K; Lachenmaier, T; Lalanne, D; Lanfranchi, J C; Lazauskas, R; Lemrani, A R; Li, J; Mansoulie, B; Marquet, Ch; Martinez, J; Mirizzi, A; Morfin Jorge, G; Motz, H; Murphy, A; Navas, S; Niedermeier, L; Nishiura, H; Nomachi, M; Nones, C.; Ogawa, H; Ogawa, I; Ohsumi, H; Palladino, V; Paniccia, M; Perotto, L; Petcov, S; Pfister, S; Piquemal, F; Poves, A; Praet, Ch; Raffelt, G; Ramberg, E; Rashba, T; Regnault, N; Ricol, J St; Rodejohann, W; Rodin, V; Ruz, J; Sander, Ch; Sarazin, X; Scholberg, K; Sigl, G; Simkovic, F; Sousa, A; Stanev, T; Strolger, L; Suekane, F; Thomas, J; Titov, N; Toivanen, J; Torrente-Lujan, E; Tytler, D; Vala, L; Vignaud, D; Vitiello, G; Vogel, P; Volkov, G; Volpe, C; Wong, H; Yilmazer, A

    2006-07-01

    This second symposium on neutrinos and dark matter is aimed at discussing research frontiers and perspectives on currently developing subjects. It has been organized around 6 topics: 1) double beta decays, theory and experiments (particularly: GERDA, MOON, SuperNEMO, CUORE, CANDLES, EXO, and DCBA), 2) neutrinos and nuclear physics, 3) single beta decays and nu-responses, 4) neutrino astrophysics, 5) solar neutrino review, and 6) neutrino oscillations. This document is made up of the slides of the presentations.

  16. Structure-activity relationship study of sesquiterpene lactones and their semi-synthetic amino derivatives as potential antitrypanosomal products

    CSIR Research Space (South Africa)

    Zimmermann, S

    2014-03-01

    Full Text Available Stefanie Zimmermann 1,2, Gerda Fouché 3, Maria De Mieri 1, Yukiko Yoshimoto 4, Toyonobu Usuki 4, Rudzani Nthambeleni 3, Christopher J. Parkinson 5, Christiaan van der Westhuyzen 3, Marcel Kaiser 2,6, Matthias Hamburger 1 and Michael Adams 1,* 1... 1. Introduction Sleeping sickness, or human African trypanosomiasis (HAT), is a deadly protozoal disease caused by Trypanosoma brucei species spread by tsetse flies (Glossina spp.). The two human pathogenic subspecies, T. b. rhodesiense (95...

  17. Kaliningradi biennaal / Sandra Jõgeva

    Index Scriptorium Estoniae

    Jõgeva, Sandra, 1976-

    2008-01-01

    IX rahvusvaheline graafikabiennaal "Kaliningrad-Königsberg 2008" Kaliningradi kunstigaleriis 15. IX-15. XI. Eesti väljapanek (kuraator Eha Komissarov, kujundaja Marko Nautras, osalejad: Jaanika Okk, Kaarel Kütas, Lauri Koppel, Gerda Märtens, Raul Meel, Lembe Ruben, HULA, Villem Jahu, Tiiu Pirsko, Mati Veermets, Sandra Jõgeva) sai ekspositsioonipreemia. Grand prix - Paulis Liepa, I preemia - Olrik Kohlhoff, II - Dominica Sadowska, III - Raffael Rheinsberg, eripreemia - Markus Lampinen

  18. Neutrinoless double beta decay searches with 76Ge

    CERN Multimedia

    CERN. Geneva

    2017-01-01

    The search for neutrinoless double beta decay might be the only window to observe lepton number violation. Its observation would favour the leptogenesis mechanism for the explanation of the baryon asymmetry of the universe and is therefore considered to be of highest relevance. The isotope 76Ge has historically been most important for this search and the ongoing experiment GERDA has the lowest background of all experiments in the field. The talk reviews the motivation, the current status of experiments and future programs.

  19. EU REPRO: The Production of fish feed enriched with poly-unsaturated fatty acid

    CSIR Research Space (South Africa)

    Erasmus, C

    2007-01-01

    Full Text Available .2 The Production of Fish Feed enriched with poly-unsaturated fatty acids Corinda Erasmus Annali Jacobs Gerda Lombard Petrus van Zyl Judy Reddy Ntombikayise Nkomo Elizabeth Timme Partner 11 Slide 2 © CSIR 2006 www... www.csir.co.za FLOW DIAGRAM OF THE PRODUCTION OF EPA- ENRICHED FISH FEED BSG (SPENT GRAIN) Eicosapentaenoic Acid (EPA) Protein-rich BSG FISH FEED PELLETS MODIFICATION OF BSG (ENZYME/CHEMICAL/MECHANICAL) FERMENTATION (RECOVERY OF EPA...

  20. Kiasma - muzei s vidom na Laplandiju / Galina Balashova

    Index Scriptorium Estoniae

    Balashova, Galina

    2006-01-01

    Steven Holli projekteeritud Kiasma muuseumihoonest Helsingis. Kontseptuaalkunsti näitusest ARS 06 "Reaalsustunne" Kiasmas. Eestlastest esineb Mark Raidpere. Vene kunstnikegrupi AEC+F ja vene kunstnike Juri Vassiljevi ning Aleksandr Ponomarjovi töödest näitusel. Ka Gerda Steineri & Jörg Lenzlingeri (Šveits), Martin & Munoz'i (USA, Hispaania), videokunstnik Bill Viola (USA) töödest

  1. ARS - Helsinki - 2006 / Galina Balashova

    Index Scriptorium Estoniae

    Balashova, Galina

    2006-01-01

    Steven Holli projekteeritud Kiasma muuseumihoonest Helsingis. Kontseptuaalkunsti näitusest ARS 06 "Reaalsustunne" Kiasmas. Eestlastest esineb Mark Raidpere. Vene kunstnikegrupi AEC+F ja vene kunstnike Juri Vassiljevi ning Aleksandr Ponomarjovi töödest näitusel. Ka Gerda Steineri & Jörg Lenzlingeri (Šveits), Martin & Munoz'i (USA, Hispaania), arvutigraafik Charles Sandisoni (SB), videokunstnik Bill Viola (USA) jt. töödest

  2. NDM06: 2. symposium on neutrinos and dark matter in nuclear physics

    International Nuclear Information System (INIS)

    Akerib, D.; Arnold, R.; Balantekin, A.; Barabash, A.; Barnabe, H.; Baroni, S.; Baussan, E.; Bellini, F.; Bobisut, F.; Bongrand, M.; Brofferio, Ch.; Capolupo, A.; Carrara Enrico; Caurier, E.; Cermak, P.; Chardin, G.; Civitarese, O.; Couchot, F.; Kerret, H. de; Heros, C. de los; Detwiler, J.; Dracos, M.; Drexlin, G.; Efremenko, Y.; Ejiri, H.; Falchini, E.; Fatemi-Ghomi, N.; Finger, M.Ch.; Finger Miroslav, Ch.; Fiorillo, G.; Fiorini, E.; Fracasso, S.; Frekers, D.; Fushimi, K.I.; Gascon, J.; Genest, M.H.; Georgadze, A.; Giuliani, A.; Goeger-Neff, M.; Gomez-Cadenas, J.J.; Greenfield, M.; H de Jesus, J.; Hallin, A.; Hannestad, St.; Hirai, Sh.; Hoessl, J.; Ianni, A.; Ieva, M.B.; Ishihara, N.; Jullian, S.; Kaim, S.; Kajino, T.; Kayser, B.; Kochetov, O.; Kopylov, A.; Kortelainen, M.; Kroeninger, K.; Lachenmaier, T.; Lalanne, D.; Lanfranchi, J.C.; Lazauskas, R.; Lemrani, A.R.; Li, J.; Mansoulie, B.; Marquet, Ch.; Martinez, J.; Mirizzi, A.; Morfin Jorge, G.; Motz, H.; Murphy, A.; Navas, S.; Niedermeier, L.; Nishiura, H.; Nomachi, M.; Nones, C.; Ogawa, H.; Ogawa, I.; Ohsumi, H.; Palladino, V.; Paniccia, M.; Perotto, L.; Petcov, S.; Pfister, S.; Piquemal, F.; Poves, A.; Praet, Ch.; Raffelt, G.; Ramberg, E.; Rashba, T.; Regnault, N.; Ricol, J.St.; Rodejohann, W.; Rodin, V.; Ruz, J.; Sander, Ch.; Sarazin, X.; Scholberg, K.; Sigl, G.; Simkovic, F.; Sousa, A.; Stanev, T.; Strolger, L.; Suekane, F.; Thomas, J.; Titov, N.; Toivanen, J.; Torrente-Lujan, E.; Tytler, D.; Vala, L.; Vignaud, D.; Vitiello, G.; Vogel, P.; Volkov, G.; Volpe, C.; Wong, H.; Yilmazer, A.

    2006-01-01

    This second symposium on neutrinos and dark matter is aimed at discussing research frontiers and perspectives on currently developing subjects. It has been organized around 6 topics: 1) double beta decays, theory and experiments (particularly: GERDA, MOON, SuperNEMO, CUORE, CANDLES, EXO, and DCBA), 2) neutrinos and nuclear physics, 3) single beta decays and nu-responses, 4) neutrino astrophysics, 5) solar neutrino review, and 6) neutrino oscillations. This document is made up of the slides of the presentations

  3. GELATIO: a general framework for modular digital analysis of high-purity Ge detector signals

    International Nuclear Information System (INIS)

    Agostini, M; Pandola, L; Zavarise, P; Volynets, O

    2011-01-01

    GELATIO is a new software framework for advanced data analysis and digital signal processing developed for the GERDA neutrinoless double beta decay experiment. The framework is tailored to handle the full analysis flow of signals recorded by high purity Ge detectors and photo-multipliers from the veto counters. It is designed to support a multi-channel modular and flexible analysis, widely customizable by the user either via human-readable initialization files or via a graphical interface. The framework organizes the data into a multi-level structure, from the raw data up to the condensed analysis parameters, and includes tools and utilities to handle the data stream between the different levels. GELATIO is implemented in C++. It relies upon ROOT and its extension TAM, which provides compatibility with PROOF, enabling the software to run in parallel on clusters of computers or many-core machines. It was tested on different platforms and benchmarked in several GERDA-related applications. A stable version is presently available for the GERDA Collaboration and it is used to provide the reference analysis of the experiment data.

  4. Geneva University

    CERN Multimedia

    2006-01-01

    Université de Genève Ecole de physique 24 quai Ernest Ansermet 1211 Genève 4 Tél : + 41 22 379 63 83 (secrétariat) Tél : + 41 22 379 62 56 (réception) Fax: + 41 22 379 69 22 Wednesday 29th November 2006 PARTICLE PHYSICS SEMINAR at 17.00 hrs - Stückelberg Auditorium The Germanium Detector Array (GERDA) for the search of neutrinoless double beta decays of 76 Ge at LNGS line by Prof. Stefan Schoenert - Max-Planck-Institut für Kernphysik Heidelberg The Germanium Detector Array (GERDA [1]) for the search of neutrinoless double beta decays of 76Ge at LNGS will operate bare germanium diodes enriched in 76 Ge in an (optional active) cryogenic fluid shield to investigate neutrinoless double beta decay with a sensitivity of T_{1/2} > 2 x 1026~years after an exposure of 100~rm kg x rm years. In this talk, I shall introduce the relevance of neutrinoless double beta decay, the experimental concepts of GERDA, the challenges and techniques to reduce backgrounds to neutrinoless double beta decay, and summarize...

  5. Feature extraction with deep neural networks by a generalized discriminant analysis.

    Science.gov (United States)

    Stuhlsatz, André; Lippel, Jens; Zielke, Thomas

    2012-04-01

    We present an approach to feature extraction that is a generalization of the classical linear discriminant analysis (LDA) on the basis of deep neural networks (DNNs). As for LDA, discriminative features generated from independent Gaussian class conditionals are assumed. This modeling has the advantages that the intrinsic dimensionality of the feature space is bounded by the number of classes and that the optimal discriminant function is linear. Unfortunately, linear transformations are insufficient to extract optimal discriminative features from arbitrarily distributed raw measurements. The generalized discriminant analysis (GerDA) proposed in this paper uses nonlinear transformations that are learnt by DNNs in a semisupervised fashion. We show that the feature extraction based on our approach displays excellent performance on real-world recognition and detection tasks, such as handwritten digit recognition and face detection. In a series of experiments, we evaluate GerDA features with respect to dimensionality reduction, visualization, classification, and detection. Moreover, we show that GerDA DNNs can preprocess truly high-dimensional input data to low-dimensional representations that facilitate accurate predictions even if simple linear predictors or measures of similarity are used.

  6. Status of double beta decay experiments using isotopes other than 136Xe

    Science.gov (United States)

    Pandola, L.

    2014-09-01

    Neutrinoless double beta decay is a lepton-number violating process predicted by many extensions of the standard model. It is actively searched for in several candidate isotopes within many experimental projects. The status of the experimental initiatives which are looking for the neutrinoless double beta decay in isotopes other than 136Xe is reviewed, with special emphasis given to the projects that passed the R&D phase. The results recently released by the experiment GERDA are also summarized and discussed. The GERDA data give no positive indication of neutrinoless double beta decay of 76Ge and disfavor in a model-independent way the long-standing observation claim on the same isotope. The lower limit reported by GERDA for the half-life of neutrinoless double beta decay of 76Ge is T1/20ν > 2.1 ṡ1025 yr (90% C.L.), or T1/20ν > 3.0 ṡ1025 yr, when combined with the results of other 76Ge predecessor experiments.

  7. Investigation and development of the suppression methods of the {sup 42}K background in LArGe

    Energy Technology Data Exchange (ETDEWEB)

    Lubashevskiy, Alexey [Max-Planck-Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    GERDA is an ultra-low background experiment aimed for the neutrinoless double beta decay search. The search is performed using HPGe detectors operated in liquid argon (LAr). One of the most dangerous backgrounds in GERDA is the background from {sup 42}K which is a daughter isotope of cosmogenically produced {sup 42}Ar. {sup 42}K ions are collected towards to the detector by the electric field of the detector. Estimation of the background contribution and development of the suppression methods were performed in the low background test facility LArGe. For this purpose encapsulated HPGe and bare BEGe detectors were operated in 1m{sup 3} of LAr in the LArGe setup. It is equipped with scintillation veto, so particles which deposit part of their energy in LAr can be detected by 9 PMTs. In order to better understand background and to increase statistics the LAr of LArGe was spiked with specially produced {sup 42}Ar. All these investigations allowed us to estimate background contribution from {sup 42}K and demonstrate the possibility to suppress it in future measurements in GERDA Phase II.

  8. GELATIO: a general framework for modular digital analysis of high-purity Ge detector signals

    Science.gov (United States)

    Agostini, M.; Pandola, L.; Zavarise, P.; Volynets, O.

    2011-08-01

    GELATIO is a new software framework for advanced data analysis and digital signal processing developed for the GERDA neutrinoless double beta decay experiment. The framework is tailored to handle the full analysis flow of signals recorded by high purity Ge detectors and photo-multipliers from the veto counters. It is designed to support a multi-channel modular and flexible analysis, widely customizable by the user either via human-readable initialization files or via a graphical interface. The framework organizes the data into a multi-level structure, from the raw data up to the condensed analysis parameters, and includes tools and utilities to handle the data stream between the different levels. GELATIO is implemented in C++. It relies upon ROOT and its extension TAM, which provides compatibility with PROOF, enabling the software to run in parallel on clusters of computers or many-core machines. It was tested on different platforms and benchmarked in several GERDA-related applications. A stable version is presently available for the GERDA Collaboration and it is used to provide the reference analysis of the experiment data.

  9. Structural, Chemical and Physical Properties of Mn12

    Science.gov (United States)

    Sessoli, Roberta

    1997-03-01

    Recent investigations on the physical properties of the first molecular nanomagnet, Mn12ac, will be reported. Among them very high field EPR spectra (up to 25 T) (A. L. Barra, D. Gatteschi, R. Sessoli Phys. Rev. B. submitted) have provided precise information on the spin hamiltonian up to the fourth order terms. These new findings justify the irregularities in the step separations in the quantum hysteresis that we have observed performing the measurements on a single crystal (L. Thomas et al, Nature.383, 145 (1996)), and confirm that we are observing resonant quantum tunneling of the magnetization. The magnetic hysteresis has been also optically detected in collaboration with Prof. A. Thomson of the University of East Anglia, UK. Possible modifications to the Mn12 cluster as well as an iron cluster showing MQT of the magnetization (C. Sangregorio, T. Ohm, C. Paulsen, R. Sessoli, D. Gatteschi, submitted) will be briefly presented.

  10. Organizational Communication and Media

    DEFF Research Database (Denmark)

    Tække, Jesper

      The paper reflects an interest in the relation between organizational communication and media. It tries to answer the question, how we can observe the relationship between organizational communication and media. It is a work-in-progress which tries to combine organizational studies inspired...... of Niklas Luhmann (Tække & Paulsen 2008, Tække 2008a) with analysis of how organizations communicate in and about media. Using systems theory and form theory, it puts forward a theoretical framework and a strategy for analysing organisational communication in and about media. The medium aspect is inspired...... is a possible framework to draw the two disciplines together in, because it is a theory about the relation between the social and the media it is based on. First the paper sum up the Luhmann inspired theory about organizations, fleshing out how organizations are thought to communicate in and about media and how...

  11. Synchronous correlation matrices and Connes’ embedding conjecture

    Energy Technology Data Exchange (ETDEWEB)

    Dykema, Kenneth J., E-mail: kdykema@math.tamu.edu [Department of Mathematics, Texas A& M University, College Station, Texas 77843-3368 (United States); Paulsen, Vern, E-mail: vern@math.uh.edu [Department of Mathematics, University of Houston, Houston, Texas 77204 (United States)

    2016-01-15

    In the work of Paulsen et al. [J. Funct. Anal. (in press); preprint arXiv:1407.6918], the concept of synchronous quantum correlation matrices was introduced and these were shown to correspond to traces on certain C*-algebras. In particular, synchronous correlation matrices arose in their study of various versions of quantum chromatic numbers of graphs and other quantum versions of graph theoretic parameters. In this paper, we develop these ideas further, focusing on the relations between synchronous correlation matrices and microstates. We prove that Connes’ embedding conjecture is equivalent to the equality of two families of synchronous quantum correlation matrices. We prove that if Connes’ embedding conjecture has a positive answer, then the tracial rank and projective rank are equal for every graph. We then apply these results to more general non-local games.

  12. Connes' embedding problem and winning strategies for quantum XOR games

    Science.gov (United States)

    Harris, Samuel J.

    2017-12-01

    We consider quantum XOR games, defined in the work of Regev and Vidick [ACM Trans. Comput. Theory 7, 43 (2015)], from the perspective of unitary correlations defined in the work of Harris and Paulsen [Integr. Equations Oper. Theory 89, 125 (2017)]. We show that the winning bias of a quantum XOR game in the tensor product model (respectively, the commuting model) is equal to the norm of its associated linear functional on the unitary correlation set from the appropriate model. We show that Connes' embedding problem has a positive answer if and only if every quantum XOR game has entanglement bias equal to the commuting bias. In particular, the embedding problem is equivalent to determining whether every quantum XOR game G with a winning strategy in the commuting model also has a winning strategy in the approximate finite-dimensional model.

  13. Trocas gasosas de mudas de videira, obtidas por dois porta-enxertos, submetidos à deficiência hídrica.

    OpenAIRE

    SOUZA, C.R. de; SOARES, A.M.; REGINA, M. de A.

    2001-01-01

    Este trabalho teve como objetivo avaliar o efeito da deficiência hídrica e de dois porta-enxertos nas trocas gasosas de mudas de videira cultivadas em vasos, nas condições de casa de vegetação. Utilizou-se como copa a 'Niágara Rosada' (Vitis labrusca), e como porta-enxertos, o 101-14 (V. riparia) e o 1103 Paulsen (V. rupestris x V. berlandieri). Doze dias após a suspensão da rega, o potencial hídrico foliar da combinação 'Niágara Rosada'/101-14 apresentou os menores valores (-2,80 MPa) em rel...

  14. Waste-water assay with continuous algal cultures: the effect of mercuric acetate on the growth of some marine dinoflagellates

    Energy Technology Data Exchange (ETDEWEB)

    Kayser, H.

    1976-01-01

    The effect of mercuric acetate was studied in culture experiments with the dinoflagellates Scrippsiella faeroense (Paulsen) Balech et Soares, Prorocentrum micans Ehrenberg and Gymnodinium splendens Lebour. Impairment of growth rates, in vivo chlorophyll fluorescence, maximum cell densities and morphological changes served as criteria for assessing sublethal influences. Tests were made using the batch- and continuous-culture techniques. Addition of Hg at concentrations of 0.001 mg.1/sup -1/ and higher resulted in reduction of relative growth rates. In a few cases populations recovered from the initial decline and showed new growth. Cell counts corresponded very closely to in vivo chlorophyll fluorescence measurements. Morphological variations were observed in S. faeroense, which responded (even in sublethal concentrations) by bursting its thecae, releasing naked motile cells and forming vegetative resting stages. The problems of optimal algal-bioassay methods are discussed also, in the light of results obtained by other authors.

  15. Mask industry quality assessment

    Science.gov (United States)

    Strott, Al; Bassist, Larry

    1994-12-01

    Product quality and timely delivery are two of the most important parameters in determining the success of a mask manufacturing facility. Because of the sensitivity of this data, very little was known about industry performance in these areas until an assessment was authored and presented at the 1993 BACUS Symposium by Larry Regis of Intel Corporation, Neil Paulsen of Intel Corporation, and James A. Reynolds of Reynolds Consulting. This data has been updated and will be published and presented at this year's BACUS Symposium. Contributor identities will again remain protected by utilizing Arthur Andersen & Company to compile the submittals. Participation was consistent with last year's representation of over 75% of the total merchant and captive mask volume in the United States. The data compiled includes shipments, customer return rate, customer return reasons from 1988 through Q2, 1994, performance to schedule, plate survival yield, and throughput time (TPT).

  16. Associations between generic substitution and patient-related factors

    DEFF Research Database (Denmark)

    Østergaard Rathe, Jette

    Associations between generic substitution and patient-related factors Jette Østergaard Rathe1, Pia V. Larsen1, Morten Andersen2, Janus L. Thomsen3, Maja S. Paulsen1, Jens Søndergaard1 1. Research Unit of General Practice, Institute of Public Health, University of Southern Denmark 2. Centre...... for Pharmacoepidemiology, Karolinska Institutet, Department of Medicine Solna, Stockholm, Sweden 3. Danish Quality Unit of General Practice, Odense, Denmark Background Generic substitution means that chemically equivalent but less expensive drugs are dispensed in place of a brand name product. Although generic medicines...... by definition are bioequivalent to their brand name counterparts there are concerns about whether generic substitution is always accompanied by clinical equivalence in terms of effectiveness and that it may cause concerns and thereby causing some skepticism towards generic substitution. There is, however...

  17. Trastornos temporomandibulares y su interacción con la postura corporal

    Directory of Open Access Journals (Sweden)

    José Miguel Montero Parrilla

    Full Text Available Introducción: en los últimos años se ha sugerido que los trastornos temporomandibulares pueden estar influenciados por la postura corporal. Objetivo: caracterizar los trastornos temporomandibulares basados en su interacción con las variables posturales. Métodos: se realizó un estudio observacional descriptivo y transversal en el período comprendido entre febrero de 2011 y marzo 2012, en el cual a 122 estudiantes de 3er. año de la Facultad de Estomatología, se les realizó el examen clínico en dos momentos, primero se examinó la oclusión dentaria y posteriormente se realizó el examen postural. Se aplicó el Test de Krogh-Paulsen para diagnosticar trastornos temporomandibulares. Resultados: independientemente del tipo postural, los principales signos y síntomas encontrados fueron las irregularidades en abertura y cierre y los sonidos articulares, presentes en el 45,1 % y 31,2 % respectivamente. El 40,2 % de los estudiantes tuvo una postura del tipo B, seguida por la postura del tipo D, encontradas en el 29,5 % de los casos. Solo 36 de los estudiantes estaban sanos. El desequilibrio derecho de pelvis fue el más observado, presente en el 48,4 % de la muestra. Conclusiones: para todas las posibles clasificaciones del test de Krogh-Paulsen predominaron los pacientes con desequilibrio derecho de pelvis. Los pacientes con chasquidos de la articulación temporomandibular tenían las pelvis y los hombros desequilibrados en el mismo sentido, pero contrario al lugar donde aparecía el signo. No se evidencia una marcada relación entre las alteraciones posturales y los trastornos temporomandibulares.

  18. Arctic shelves as platforms for biogeochemical activity: Nitrogen and carbon transformations in the Chukchi Sea, Alaska

    Science.gov (United States)

    Hardison, Amber K.; McTigue, Nathan D.; Gardner, Wayne S.; Dunton, Kenneth H.

    2017-10-01

    Continental shelves comprise 50% of marine denitrification. The Hanna Shoal region, part of the continental shelf system in the northeast Chukchi Sea, Alaska, is recognized for its high biodiversity and productivity. We investigated the role of sediments in organic matter decomposition and nutrient cycling at five stations on the shallow Hanna Shoal. In particular, we asked (1) how much sediment organic matter is remineralized in the Chukchi Sea, and what factors drive this degradation, (2) do sediments function as a net source for fixed nitrogen (thus fueling primary production in the overlying water), or as a net sink for fixed nitrogen (thereby removing it from the system), and (3) what is the balance between sediment NH4+ uptake and regeneration, and what factors drive NH4+ cycling? We conducted dark sediment core incubations to measure sediment O2 consumption, net N2 and nutrient (NH4+, NO3-, NO2-, PO43-) fluxes, and rates of sediment NH4+ cycling, including uptake and regeneration. Rates of sediment O2 consumption and NH4+ and PO43- efflux suggest that high organic matter remineralization rates occurred in these cold (-2 °C) sediments. We estimated that total organic carbon remineralization accounted for 20-57% of summer export production measured on the Chukchi Shelf. Net N2 release was the dominant nitrogen flux, indicating that sediments acted as a net sink for bioavailable nitrogen via denitrification. Organic carbon remineralization via denitrification accounted for 6-12% of summer export production, which made up 25% of the total organic carbon oxidized in Hanna Shoal sediments. These shallow, productive Arctic shelves are ;hotspots; for organic matter remineralization.

  19. The place of emotion in stories told by children: an exploratory study.

    Science.gov (United States)

    Allen, N B; Bradley, B S

    1993-09-01

    This study explored the relationship between developmental changes in children's understanding of emotions and their use of affective content (Wilkinson, Barnsley, Hanna, & Swan, 1980) and affective structure (Brewer & Lichtenstein, 1982) in the production of stories. We hypothesized that children with an advanced understanding of emotions would make more use of both affective content and affective structure. This relationship was found only for affective content, which was more advanced in girls than boys. Affective structure did not relate to affective understanding or sex but, rather, to verbal intelligence. The implications of these results for the part played by psychological processes in children's story telling are discussed.

  20. Annual Reports of Education, Health and Sport 9781329900608

    OpenAIRE

    Lewandowski, Andrzej et al.

    2014-01-01

    Radomska Szkoła Wyższa w Radomiu Radom University in Radom Annual Reports of Education, Health and Sport 9781329900608 Edited by Iwona Czerwińska Pawluk Jan Falkowski Hanna Żukowska Mirosława Szark-Eckardt Wiesława Pilewska Walery Zukow http://ojs.ukw.edu.pl/index.php/johs/index http://journal.rsw.edu.pl https://pbn.nauka.gov.pl/search?search&searchCategory=WORK&filter.inJournal=49068 https://pbn.nauka.gov.pl/search?search&searchCategory=WORK&filte...

  1. [Medical power and the crisis in bonds of trust within contemporary medicine].

    Science.gov (United States)

    Azeredo, Yuri Nishijima; Schraiber, Lilia Blima

    2016-01-01

    Based on the Brazilian context, this paper addresses medical power in terms of the current conflicts in the intersubjective relationships that doctors establish in their work, conflicts considered here as a product of a crisis of trust connected to recent historical transformations in the medical practice. Reading these conflicts as questions of an ethical and moral order, we use Hanna Arendt's theoretical formulations to further analyze this crisis of trust. In this way, utilizing the concepts of "crisis," "tradition," "power," "authority," and "natality," we search for new meanings regarding these conflicts, enabling new paths and solutions that avoid nostalgia for the past.

  2. Growing Local Value How to Build Business Partnerships That Strengthen Your Community

    CERN Document Server

    Hammel, Laury

    2007-01-01

    Hanna Andersson founder Gun Denhart and successful entrepreneur Laury Hammel show how every aspect of a business (from product creation to employee recruitment to vendor selection) holds the dual promise of bigger profits and a stronger local community. With practical tools and real-life examples of the best practitioners and techniques of values-driven business, "Growing Local Value" provides a framework for the full spectrum of ways in which a business can contribute to its community - and the benefits a company receives when it does so.

  3. Verification using Satisfiability Checking, Predicate Abstraction, and Craig Interpolation

    Science.gov (United States)

    2008-09-01

    297, 2007. 4.10.1 196 [48] Roberto Bruttomesso, Alessandro Cimatti, Anders Franzen, Alberto Grig- gio, Ziyad Hanna, Alexander Nadel, Amit Palti, and...using SAT based conflict analysis. In Formal Methods in Computer Aided Design, pages 33–51, 2002. 1.1, 7 [54] Alessandro Cimatti, Alberto Griggio, and...and D. Vroon. Automatic memory reductions for RTL-level verification. In ICCAD, 2006. 1.2.4, 6.2, 7 [108] Joao P. Marques-Silva and Karem A. Sakallah

  4. Programowanie żywieniowe - wpływ odżywiania kobiet w ciąży na zdrowie dziecka = Nutritional programming - the impact of nutrition of pregnant women on the health of their children

    OpenAIRE

    Pudło, Hanna; Respondek, Malwina

    2016-01-01

    Pudło Hanna, Respondek Malwina. Programowanie żywieniowe - wpływ odżywiania kobiet w ciąży na zdrowie dziecka = Nutritional programming - the impact of nutrition of pregnant women on the health of their children. Journal of Education, Health and Sport. 2016;6(7):589-600. eISSN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.59761 http://ojs.ukw.edu.pl/index.php/johs/article/view/3733 https://pbn.nauka.gov.pl/sedno-webapp/works/741379 The journal has had 7 points in Min...

  5. CBR Operations in Cold Weather: A Bibliography. Volume 1

    Science.gov (United States)

    1989-11-01

    JOHNSTON R C SWAMP OAK TEST DATA DOD/DROLS ; HANNEMANN M M D ANALYSIS. 514727L ;HALLANGER N L ;KROTH J R ;WESTLAKE WILFRED J ; HAMILTON WILLIAM M 1953...E 1963 HANNA ALFRED E; SIMULATED COLD WEATHER DOD/DROLS RADIOLOGICAL DECONTAMINATION 296248 OF RECOVERY EQUIPMENT. HANNEMANN M M D 1967 JOHNSTON R C...SWAMP OAK TEST DATA DOD/DROLS ; HANNEMANN M M D ANALYSIS. 514727L ;HALLANGER N L ;KROTH J R ;WESTLAKE WILFRED J : 37 HELLBERG E N 1961 TAYLOR D

  6. The significance of Good Chair as part of children’s school and home environment in the preventive treatment of body statistics distortions

    OpenAIRE

    Mirosław Mrozkowiak; Hanna Żukowska

    2015-01-01

    Mrozkowiak Mirosław, Żukowska Hanna. Znaczenie Dobrego Krzesła, jako elementu szkolnego i domowego środowiska ucznia, w profilaktyce zaburzeń statyki postawy ciała = The significance of Good Chair as part of children’s school and home environment in the preventive treatment of body statistics distortions. Journal of Education, Health and Sport. 2015;5(7):179-215. ISSN 2391-8306. DOI 10.5281/zenodo.19832 http://ojs.ukw.edu.pl/index.php/johs/article/view/2015%3B5%287%29%3A179-215 https:...

  7. Performance artist's workbook : on teaching and learning performance art : essays and exercises

    OpenAIRE

    Porkola, Pilvi

    2017-01-01

    The aim of this book is to offer perspectives on performance art practice with a focus on teaching. This subject has been rarely approached in the literature and this book gives insights and inspiration for all those teaching performance art as well as to anyone else interested in this art form. The first part of the book comprises articles by five performance artist, scholars and teachers: professor Ray Langenbach, Dr Annette Arlander, Dr Hanna Järvinen, Dr Tero Nauha and professor Pilvi Por...

  8. Discriminality of statistically independent Gaussian noise tokens and random tone-burst complexes

    OpenAIRE

    Goossens, T.L.J.; Par, van de, S.L.J.D.E.; Kohlrausch, A.G.; Kollmeier, B.; Klump, G.; Hohmann, V.; Langemann, U.; Mauermann, M.; Uppenkamp, S.; Verhey, J.

    2007-01-01

    Hanna (1984) has shown that noise tokens with a duration of 400 ms are harder to discriminate than noise tokens of 100 ms. This is remarkable because a 400-ms stimulus potentially contains four times as much information for judging dissimilarity than the 100-ms stimulus. Apparently, the ability to use all information in a stimulus is impaired by some kind of limitation, e.g. a memory limitation (cf. Cowan 2000) or a limitation in the ability to allocate attentional resources (cf. Kidd and Wat...

  9. A preliminary checklist of butterflies recorded from Jeypore-Dehing forest, eastern Assam, India

    Directory of Open Access Journals (Sweden)

    M.J. Gogoi

    2013-02-01

    Full Text Available The paper describes some of the rare butterfly species recorded during February 2010-October 2011 in the lowland semi-evergreen Jeypore rainforest of upper Assam along with a preliminary checklist of the area. Altogether, 292 species were recorded based on the survey conducted in different seasons. Important sightings include the report of White Punch longicaudata, Pale Striped Dawnfly Capilia zennara, Blue Quaker Pithecops fulgens etc and range extension of Andaman Yellow-banded Flat Celaenorrhinus andamanicus hanna to northeastern India.

  10. Päästeamet tunnustas elupäästjaid ja jagas aumärke / Reimo Raja

    Index Scriptorium Estoniae

    Raja, Reimo

    2010-01-01

    2010. a. septembris autasutas siseminister Marko Pomerants ja Päästeameti peadirektor elupäästjaid. Pikemalt päästeoperatsioonidest, kus päästjateks olid Mehis Kont, Aleksei Rožkov, Kertu Rannak, Georg Alema, Hanna-Maria Puhke, Merit Kalamägi, Toomas Pagil, Janek Lember, Maiken Nelis, Markku Eklund, Olaf Orgs, Eduard Borovik, Vadim Kaminski, Eduard Bemidas, Ants Viirmann, Olesja Nekrassova, Konstantin Fjodorov, Ramid Niftalyev, Konstantin Gerassimov, Tarvo Turja, Aleksander Beljajev, Kalle Närska, Margus Matto, Igor Koževnikov, Vyacheslav Didenko, Boriss Mihhejev, Alexander Berezko, Aleksander Küttim, Andrei Larin, Aleksandr Bolšakov, Andrei Põld

  11. A fascinating field and a pragmatic enterprise

    DEFF Research Database (Denmark)

    Hjørland, Birger

    2013-01-01

    A reviewer wrote about the book: "I synnerhet Hjørlands kapitel väcker frågor om fältets inriktning och framtid som det hade varit intressant om redaktörerna hade fångat upp och diskuterat i ett avslutande och syntetiserande kapitel. Detta hade kunnat lyfta denna konferensantologi till något mer ...... en spännande samling texter." Hanna Carlsson i Nordisk Tidsskrift for Informationsvidenskab og Kulturformidling: http://www.ntik.dk/2014/Nr1/Carlsson.pdf...

  12. Pulse shapes and surface effects in segmented germanium detectors

    International Nuclear Information System (INIS)

    Lenz, Daniel

    2010-01-01

    It is well established that at least two neutrinos are massive. The absolute neutrino mass scale and the neutrino hierarchy are still unknown. In addition, it is not known whether the neutrino is a Dirac or a Majorana particle. The GERmanium Detector Array (GERDA) will be used to search for neutrinoless double beta decay of 76 Ge. The discovery of this decay could help to answer the open questions. In the GERDA experiment, germanium detectors enriched in the isotope 76 Ge are used as source and detector at the same time. The experiment is planned in two phases. In the first, phase existing detectors are deployed. In the second phase, additional detectors will be added. These detectors can be segmented. A low background index around the Q value of the decay is important to maximize the sensitivity of the experiment. This can be achieved through anti-coincidences between segments and through pulse shape analysis. The background index due to radioactive decays in the detector strings and the detectors themselves was estimated, using Monte Carlo simulations for a nominal GERDA Phase II array with 18-fold segmented germanium detectors. A pulse shape simulation package was developed for segmented high-purity germanium detectors. The pulse shape simulation was validated with data taken with an 19-fold segmented high-purity germanium detector. The main part of the detector is 18-fold segmented, 6-fold in the azimuthal angle and 3-fold in the height. A 19th segment of 5mm thickness was created on the top surface of the detector. The detector was characterized and events with energy deposited in the top segment were studied in detail. It was found that the metalization close to the end of the detector is very important with respect to the length of the of the pulses observed. In addition indications for n-type and p-type surface channels were found. (orig.)

  13. Pulse shapes and surface effects in segmented germanium detectors

    Energy Technology Data Exchange (ETDEWEB)

    Lenz, Daniel

    2010-03-24

    It is well established that at least two neutrinos are massive. The absolute neutrino mass scale and the neutrino hierarchy are still unknown. In addition, it is not known whether the neutrino is a Dirac or a Majorana particle. The GERmanium Detector Array (GERDA) will be used to search for neutrinoless double beta decay of {sup 76}Ge. The discovery of this decay could help to answer the open questions. In the GERDA experiment, germanium detectors enriched in the isotope {sup 76}Ge are used as source and detector at the same time. The experiment is planned in two phases. In the first, phase existing detectors are deployed. In the second phase, additional detectors will be added. These detectors can be segmented. A low background index around the Q value of the decay is important to maximize the sensitivity of the experiment. This can be achieved through anti-coincidences between segments and through pulse shape analysis. The background index due to radioactive decays in the detector strings and the detectors themselves was estimated, using Monte Carlo simulations for a nominal GERDA Phase II array with 18-fold segmented germanium detectors. A pulse shape simulation package was developed for segmented high-purity germanium detectors. The pulse shape simulation was validated with data taken with an 19-fold segmented high-purity germanium detector. The main part of the detector is 18-fold segmented, 6-fold in the azimuthal angle and 3-fold in the height. A 19th segment of 5mm thickness was created on the top surface of the detector. The detector was characterized and events with energy deposited in the top segment were studied in detail. It was found that the metalization close to the end of the detector is very important with respect to the length of the of the pulses observed. In addition indications for n-type and p-type surface channels were found. (orig.)

  14. Thomas A. Foster, ed. Women in Early America

    OpenAIRE

    Detsi, Zoe

    2016-01-01

    Women in Early America is an intriguing collection of essays offering richly diverse readings of women’s lives and experiences in 17th- and 18th- century America. This volume is a significant contribution to the scholarship concerning the role of women in history and their participation in historical moments of political change and cultural negotiation. From Gerda Lerner’s seminal work on The Woman in American History (1971) to Linda Kerber’s enlightening book titled Women’s America: Refocusi...

  15. Review of modern double beta decay experiments

    Science.gov (United States)

    Barabash, A. S.

    2015-10-01

    The review of modern experiments on search and studying of double beta decay processes is done. Results of the most sensitive current experiments are discussed. The main attention is paid to EXO-200, KamLAND-Zen, GERDA-I and CUORE-0 experiments. Modern values of T1/2(2ν) and best present limits on neutrinoless double beta decay and double beta decay with Majoron emission are presented. Conservative limits on effective mass of a Majorana neutrino ( at the level of ˜ 0.01-0.1 eV are discussed.

  16. Development of segmented germanium detectors for neutrinoless double beta decay experiments

    International Nuclear Information System (INIS)

    Liu, Jing

    2009-01-01

    The results from neutrino oscillation experiments indicate that at least two neutrinos have mass. However, the value of the masses and whether neutrinos and anti-neutrinos are identical, i.e., Majorana particles, remain unknown. Neutrinoless double beta decay experiments can help to improve our understanding in both cases and are the only method currently possible to tackle the second question. The GERmanium Detector Array (GERDA) experiment, which will search for the neutrinoless double beta decay of 76 Ge, is currently under construction in Hall A of the INFN Gran Sasso National Laboratory (LNGS), Italy. In order to achieve an extremely low background level, segmented germanium detectors are considered to be operated directly in liquid argon which serves simultaneously as cooling and shielding medium. Several test cryostats were built at the Max-Planck-Institut fuer Physik in Muenchen to operate segmented germanium detectors both in vacuum and submerged in cryogenic liquid. The performance and the background discrimination power of segmented germanium detectors were studied in detail. It was proven for the first time that segmented germanium detectors can be operated stably over long periods submerged in a cryogenic liquid. It was confirmed that the segmentation scheme employed does well in the identification of photon induced background and demonstrated for the first time that also neutron interactions can be identified. The C++ Monte Carlo framework, MaGe (Majorana-GERDA), is a joint development of the Majorana and GERDA collaborations. It is based on GEANT4, but tailored especially to simulate the response of ultra-low background detectors to ionizing radiation. The predictions of the simulation were veri ed to be accurate for a wide range of conditions. Some shortcomings were found and corrected. Pulse shape analysis is complementary to segmentation in identifying background events. Its efficiency can only be correctly determined using reliable pulse shape

  17. A eutonia e o trabalho do ator: experimentos

    OpenAIRE

    Fernanda Moretti Pereira de Faria

    2010-01-01

    A proposta da presente pesquisa é a prática corporal da Eutonia como ferramenta de suporte para o trabalho do ator, exemplificado pelo Sistema de K. Stanislavski. Sua leitura permite a assimilação dos conceitos teóricos da Eutonia criada por Gerda Alexander e a compreensão dos resultados práticos, descritos através de um experimento com um grupo de atores em formação. O estudo realizado em uma etapa literária e outra vivencial demonstra as possíveis conexões entre Alexander e Stanislavski. De...

  18. La Eutonía-Sus Principios

    OpenAIRE

    Rovella, Adriana

    2008-01-01

    El presente trabajo pretende dar cuenta de la Eutonía como práctica corporal dando cuenta de sus objetivos y principios La Eutonía fue creada por Gerda Alexander.El término, del griego, Eu: bueno, óptimo-Tonus: tensión; expresa la idea de una tonicidad armoniosamente equilibrada en adaptación constante al estado o actividad del momento. Es una disciplina basada en la experiencia del propio cuerpo, que conduce a la persona hacia una toma de conciencia de si misma y propone un aprendizaje para ...

  19. En la construcción del espacio interno desde la Eutonia - Escenas

    OpenAIRE

    Rovella, Adriana

    2011-01-01

    El presente trabajo contará sobre la Eutonía. Creada a mediados de 1900 por Gerda Alexander quien para el desarrollo de la misma supo integrar sus formaciones previas de música, danza, pedagogía con nuevas búsquedas, algunas surgidas durante períodos de tiempo en que guardó reposo por enfermedades. Propuso a la Eutonía como una pedagogía desde la que se alienta a aprendizajes a través del cuerpo, la atención y la concentración, a percibirse, reconocerse, moverse con economía, flexibilidad, fu...

  20. La ciencia del cosmos, la ciencia en el cosmos : 2013-2014 : ciclo de conferencias de astrofisica y cosmologia

    CERN Document Server

    Science of the Cosmos, Science in the Cosmos : 2013-2014 : series of lectures on astrophysics and cosmology

    2014-01-01

    Welcome to "Science of the Cosmos, Sciences in the Cosmos", the series of lectures that the BBVA Foundation has been offering, live and on DVD, since March 2011. Lecture 1 : Let there be light : finding the earliest galaxies / Richard Ellis ; lecture 2 : The origin of the galaxies / Simon White ; lecture 3 : Astrobiology : the quest for the conditions of life in the Universe / Gerda Horneck ; lecture 4 : The long-term stability of planetary systems / Scott Tremaine ; lecture 5 : Asteroseismology : the study of starquakes and its impact on astrophysics / Conny Aerts ; lecture 6 : From Mars to multiverse / Martin Rees

  1. Search for Neutrinoless Double-Beta Decay

    OpenAIRE

    Tornow, Werner

    2014-01-01

    After the pioneering work of the Heidelberg-Moscow (HDM) and International Germanium Experiment (IGEX) groups, the second round of neutrinoless double-$\\beta$ decay searches currently underway has or will improve the life-time limits of double-$\\beta$ decay candidates by a factor of two to three, reaching in the near future the $T_{1/2} = 3 \\times 10^{25}$ yr level. This talk will focus on the large-scale experiments GERDA, EXO-200, and KamLAND-Zen, which have reported already lower half-life...

  2. Development of segmented germanium detectors for neutrinoless double beta decay experiments

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Jing

    2009-06-09

    The results from neutrino oscillation experiments indicate that at least two neutrinos have mass. However, the value of the masses and whether neutrinos and anti-neutrinos are identical, i.e., Majorana particles, remain unknown. Neutrinoless double beta decay experiments can help to improve our understanding in both cases and are the only method currently possible to tackle the second question. The GERmanium Detector Array (GERDA) experiment, which will search for the neutrinoless double beta decay of {sup 76}Ge, is currently under construction in Hall A of the INFN Gran Sasso National Laboratory (LNGS), Italy. In order to achieve an extremely low background level, segmented germanium detectors are considered to be operated directly in liquid argon which serves simultaneously as cooling and shielding medium. Several test cryostats were built at the Max-Planck-Institut fuer Physik in Muenchen to operate segmented germanium detectors both in vacuum and submerged in cryogenic liquid. The performance and the background discrimination power of segmented germanium detectors were studied in detail. It was proven for the first time that segmented germanium detectors can be operated stably over long periods submerged in a cryogenic liquid. It was confirmed that the segmentation scheme employed does well in the identification of photon induced background and demonstrated for the first time that also neutron interactions can be identified. The C++ Monte Carlo framework, MaGe (Majorana-GERDA), is a joint development of the Majorana and GERDA collaborations. It is based on GEANT4, but tailored especially to simulate the response of ultra-low background detectors to ionizing radiation. The predictions of the simulation were veri ed to be accurate for a wide range of conditions. Some shortcomings were found and corrected. Pulse shape analysis is complementary to segmentation in identifying background events. Its efficiency can only be correctly determined using reliable pulse

  3. Water relations of field-grown grapevines in the São Francisco Valley, Brazil, under different rootstocks and irrigation strategies Relações hídricas de videiras cultivadas no Vale do São Francisco sob diferente porta-enxertos e estratégias de irrigação

    Directory of Open Access Journals (Sweden)

    Claudia Rita de Souza

    2009-08-01

    Full Text Available There is an increased demand for high quality winegrapes in the São Francisco Valley, a new wine producing area in Brazil. As the grape quality is closely linked to the soil water status, understanding the effects of rootstock and irrigation management on grapevine water relations is essential to optimize yield and quality. This study was carried out to investigate the effects of irrigation strategies and rootstocks on water relations and scion vigour of field-grown grapevines in Petrolina, Pernambuco state, Brazil. The cultivars used as scions are Moscato Canelli and Syrah, both grafted onto IAC 572 and 1103 Paulsen rootstocks. The following water treatments were used: deficit irrigation, with holding water after veraison; and partial root-zone drying, supplying (100% of crop evapotranspiration of the water loss to only one side of the root system after fruit set, alternating the sides periodically (about 24 days. In general, all treatments had values of pre-dawn leaf water potential higher than -0.2 MPa, suggesting absence of water stress. The vine water status was more affected by rootstock type than irrigation strategies. Both cultivars grafted on IAC 572 had the highest values of midday leaf water potential and stem water potential, measured on non-transpiring leaves, which were bagged with both plastic sheet and aluminum foil at least 1 h before measurements. For both cultivars, the stomatal conductance (g s, transpiration (E and leaf area index (LAI were also more affected by roostsotck type than by irrigation strategies. The IAC 572 rootstock presented higher g s, E and LAI than the 1103 Paulsen. Differences in vegetative vigor of the scion grafted onto IAC 572 rootstocks were related to its higher leaf specific hydraulic conductance and deeper root system as compared to the 1103 Paulsen, which increased the water-extraction capability, resulting in a better vine water status.Existe aumento na demanda por vinhos de alta qualidade no

  4. American Tertiary mollusks of the genus Clementia

    Science.gov (United States)

    Woodring, W.P.

    1927-01-01

    Aside from its value as an aid in determining the age of Tertiary beds, the chief interest of the genus Clementia lies in the anomalous features of its present and former distribution. An attempt is made in this paper to trace its geologic history, to point out its paleobiologic significance, and to describe all the known American Tertiary species. The fossils from Colombia used in preparing this report were collected during explorations made under the direction of Dr. 0. B. Hopkins, chief geologist of the Imperial Oil Co. (Ltd.), who kindly donated them to the United States National Museum. Dr. T. Wayland Vaughan, of the Scripps Institution of Oceanography, furnished information relating to specimens collected by him in Mexico. Dr. Bruce L. Clark, of the University of California; Dr. G. Dallas Hanna, of the California Academy of Sciences; Dr. H. A. Pilsbry, of the Philadelphia Academy of Natural Sciences; and Dr. W. D. Matthew, of the American Museum of Natural History, generously loaned type specimens and other material. Doctor Clark and Doctor Hanna also gave information concerning the Tertiary species from California. Mr. Ralph B. Stewart, of the University of California, read the manuscript, and I have taken advantage of his suggestions. I am also indebted to Mr. L. R. Cox, of the British Museum, for information relating to the fossil species from Persia, Zanzibar, and Burma, and to Dr. Axel A. Olsson, of the International Petroleum Co., for data concerning undescribed Tertiary species from Peru.

  5. Effect of inoculation with arbuscular mycorrhizas on rooting, weaning and subsequent growth of micropropagated Malus (L. Moench

    Directory of Open Access Journals (Sweden)

    Marjatta Uosukainen

    1994-05-01

    Full Text Available The importance of different rooting methods and the effects of arbuscular mycorrhizal (AMF inoculation on the rooting rate, weaning survival and subsequent growth of microcuttings of Malus rootstock YP and the Finnish crab apple cultivars Hanna and Marjatta were studied in four experiments conducted at the Laukaa Research and Elite Plant Unit, Finland. Sucrose in the in vitro rooting medium gave the best support to weaning survival in comparision with glucose and fructose. Directly rooted microcuttings had a higher survival rate than in vitro rooted microcuttings. AMF inoculation did not improve the rooting rate in direct rooting. However, the Glomus hoi strain V98 caused severe rotting of microcuttings and thus lowered the rooting rate of cv. Hanna, AMF inoculation increased the mean shoot height of established plants, particularly inoculation with G. hoi V98, G. claroideum V43a or G. fistulosum V128. This effect, however, varied considerably in different host-fungus combinations. Some AMF strains, e.g. G. hoi V1O4, caused strong growth retardation. After the rooting and weaning stage, many uninoculated plants lapsed into arrest of growth. This phenomenon was less frequent in AMF inoculated plants. Optimal timing of AMF inoculation and nutritional level of rooting and weaning substrate are discussed.

  6. Sedimentation Deposition Patterns on the Chukchi Shelf Using Radionuclide Inventories

    Science.gov (United States)

    Cooper, L. W.; Grebmeier, J. M.

    2016-02-01

    Sediment core collections and assays of the anthropogenic and natural radioisotopes, 137Cs and 210Pb, respectively, are providing long-term indications of sedimentation and current flow processes on the Chukchi and East Siberian sea continental shelf. This work, which has been integrated into interdisciplinary studies of the Chukchi Sea supported by both the US Bureau of Ocean Energy Management (COMIDA Hanna Shoal Project) and the National Oceanic and Atmospheric Administration (Russian-US Long Term Census of the Arctic, RUSALCA) includes studies of total radiocesium inventories, sedimentation rate determinations, where practical, and depths of maxima in radionuclide deposition. Shallow maxima in the activities of the anthropogenic radionuclide in sediment cores reflect areas with higher current flow (Barrow Canyon and Herald Canyon; 3-6 cm) or low sedimentation (Hanna Shoal; 1-3 cm). The first sedimentation studies from Long Strait are consistent with quiescent current conditions and steady recent sedimentation of clay particles. Elsewhere, higher and more deeply buried radionuclide inventories (> 2 mBq cm-2 at 15-17 cm depth) in the sediments correspond to areas of high particle deposition north of Bering Strait where bioturbation in productive sediments is also clearly an important influence. Radiocesium activities from bomb fallout dating to 1964 are now present at low levels (20 cm. Independent sedimentation rate measurements with the natural radionuclide 210Pb are largely consistent with the radiocesium measurements.

  7. Consistency check of pulse shape discrimination for broad energy germanium detectors using double beta decay data

    Energy Technology Data Exchange (ETDEWEB)

    Liao, Heng-Ye [Max-Planck-Institut fuer Physik, Muenchen (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    The Gerda (GERmanium Detector Array) experiment was built to study fundamental neutrino properties via neutrinoless double beta decay (0νββ). 0νββ events are single-site events (SSE) confined to a scale about millimeter. However, most of backgrounds are multi-site events (MSE). Broad Energy Germanium detectors (BEGes) offer the potential merits of improved pulse shape recognition efficiencies of SSE/MSE. They allow us to reach the goal of Phase II with a background index of 10{sup -3} cts/(keV.kg.yr) in the ROI. BEGe detectors with a total target mass of 3.63 kg have been installed to the Gerda setup in the Laboratori Nazionali del Gran Sasso (LNGS) in July 2012 and are collecting data since. A consistency check of the pulse shape discrimination (PSD) efficiencies by comparison of calibration data and 2νββ data will be presented. The PSD power of these detectors is demonstrated.

  8. The performance of the Muon Veto of the G erda experiment

    Science.gov (United States)

    Freund, K.; Falkenstein, R.; Grabmayr, P.; Hegai, A.; Jochum, J.; Knapp, M.; Lubsandorzhiev, B.; Ritter, F.; Schmitt, C.; Schütz, A.-K.; Jitnikov, I.; Shevchik, E.; Shirchenko, M.; Zinatulina, D.

    2016-05-01

    Low background experiments need a suppression of cosmogenically induced events. The Gerda experiment located at Lngs is searching for the 0ν β β decay of ^{76}Ge. It is equipped with an active muon veto the main part of which is a water Cherenkov veto with 66 PMTs in the water tank surrounding the Gerda cryostat. With this system 806 live days have been recorded, 491 days were combined muon-germanium data. A muon detection efficiency of \\varepsilon _\\upmu d=(99.935± 0.015) % was found in a Monte Carlo simulation for the muons depositing energy in the germanium detectors. By examining coincident muon-germanium events a rejection efficiency of \\varepsilon _{\\upmu r}=(99.2_{-0.4}^{+0.3}) % was found. Without veto condition the muons by themselves would cause a background index of {BI}_{μ }=(3.16 ± 0.85)× 10^{-3} cts/(keV\\cdot kg\\cdot year) at Q_{β β }.

  9. γ production and neutron inelastic scattering cross sections for 76Ge

    Science.gov (United States)

    Rouki, C.; Domula, A. R.; Drohé, J. C.; Koning, A. J.; Plompen, A. J. M.; Zuber, K.

    2013-11-01

    The 2040.7-keV γ ray from the 69th excited state of 76Ge was investigated in the interest of Ge-based double-β-decay experiments like the Germanium Detector Array (GERDA) experiment. The predicted transition could interfere with valid 0νββ events at 2039.0 keV, creating false signals in large-volume 76Ge enriched detectors. The measurement was performed with the Gamma Array for Inelastic Neutron Scattering (GAINS) at the Geel Electron Linear Accelerator (GELINA) white neutron source, using the (n,n'γ) technique and focusing on the strongest γ rays originating from the level. Upper limits obtained for the production cross section of the 2040.7-keV γ ray showed no possible influence on GERDA data. Additional analysis of the data yielded high-resolution cross sections for the low-lying states of 76Ge and related γ rays, improving the accuracy and extending existing data for five transitions and five levels. The inelastic scattering cross section for 76Ge was determined for incident neutron energies up to 2.23 MeV, significantly increasing the energy range for which experimental data are available. Comparisons with model calculations using the talys code are presented indicating that accounting for the recently established asymmetric rotor structure should lead to an improved description of the data.

  10. Constraining neutrino mass from neutrinoless double beta decay

    Science.gov (United States)

    Dev, P. S. Bhupal; Goswami, Srubabati; Mitra, Manimala; Rodejohann, Werner

    2013-11-01

    We study the implications of the recent results on neutrinoless double beta decay (0νββ) from GERDA-I (Ge76) and KamLAND-Zen+EXO-200 (Xe136) and the upper limit on the sum of light neutrino masses from Planck. We show that the upper limits on the effective neutrino mass from Xe136 are stronger than those from Ge76 for most of the recent calculations of the nuclear matrix elements (NMEs). We also analyze the compatibility of these limits with the claimed observation in Ge76 and show that while the updated claim value is still compatible with the recent GERDA limit as well as the individual Xe136 limits for a few NME calculations, it is inconsistent with the combined Xe136 limit for all but one NME. Imposing the most stringent limit from Planck, we find that the canonical light neutrino contribution cannot saturate the current limit, irrespective of the NME uncertainties. Saturation can be reached by inclusion of the right-handed (RH) neutrino contributions in TeV-scale left-right symmetric models with type-II seesaw. This imposes a lower limit on the lightest neutrino mass. Using the 0νββ bounds, we also derive correlated constraints in the RH sector, complimentary to those from direct searches at the LHC.

  11. Pulse shape discrimination studies of Phase I Ge-detectors

    Energy Technology Data Exchange (ETDEWEB)

    Kirsch, Andrea [MPI fuer Kernphysik, Saupfercheckweg 1, 69117 Heidelberg (Germany); Collaboration: GERDA-Collaboration

    2013-07-01

    The GERmanium Detector Array experiment aims to search for the neutrinoless double beta decay (0νββ) of {sup 76}Ge by using isotopically enriched germanium crystals as source and detector simultaneously. The bare semiconductor diodes are operated in liquid argon at cryogenic temperatures in an ultra-low background environment. In addition, Gerda applies different active background reduction techniques, one of which is pulse shape discrimination studies of the current Phase I germanium detectors. The analysis of the signal time structure provides an important tool to distinguish single site events (SSE) of the ββ-decay from multi site events (MSE) of common gamma-ray background or surface events. To investigate the correlation between the signal shape and the interaction position, a new, also to the predominantly deployed closed-ended coaxial HPGe detectors applicable analysis technique has been developed. A summary of the used electronic/detector assembly is given and followed by a discussion of the performed classification procedure by means of accurate pulse shape simulations of 0νββ-like signals. Finally, the obtained results are presented along with an evaluation of the relevance for the Gerda experiment.

  12. Desempenho vitivinícola da Cabernet Sauvignon sobre diferentes porta-enxertos em região de altitude de Santa Catarina

    Directory of Open Access Journals (Sweden)

    Alberto Fontanella Brighenti

    2011-03-01

    Full Text Available Apesar de os porta-enxertos serem usados primariamente como uma forma de resistência a pragas, eles são uma ligação entre o solo e a copa, e desempenham um papel importante na adaptação da videira a fatores ambientais. O objetivo deste trabalho foi avaliar três porta-enxertos e dois sistemas de condução na produtividade do vinhedo, no crescimento da copa e nas características físicas dos frutos. O experimento foi conduzido em um vinhedo experimental da Epagri - Estação Experimental de São Joaquim, localizada no município de Painel (28°01'02"S e 50°08'57"O, altitude 1.200 m. O trabalho foi executado com a cultivar Cabernet Sauvignon, enxertada sobre Paulsen 1.103 (Vitis berlandieri x Vitis rupestris, Couderc 3309 (Vitis riparia x Vitis rupestris e 1.014-14 Mgt (Vitis riparia x Vitis rupestris, em dois sistemas de condução, espaldeira e manjedoura, com cinco anos de idade, no espaçamento de 3,0 x 1,5 m. O experimento foi avaliado nas safras de 2007/08 e 2008/09. Os tratamentos porta-enxerto e sistema de condução foram arranjados em um fatorial (3 x 2. O delineamento utilizado foi o de blocos ao acaso, com quatro blocos e 20 plantas por parcela. Foram avaliados a área foliar, a produtividade médias das plantas, o índice de Ravaz, o peso de material podado, o peso de cachos, peso de 50 bagas, o número de bagas por cacho, o diâmetro das bagas, os teores de sólidos solúveis, a acidez total, o pH, os teores de antocianinas, o índice de polifenóis totais e os taninos. Plantas enxertadas em Paulsen 1103 apresentaram as menores produtividades e as maiores áreas foliares. 3.309C é o porta-enxerto menos vigoroso e interfere de maneira positiva na frutificação efetiva, pois produz maior número de bagas por cacho e bagas mais pesadas. Os porta-enxertos 1.103P e 101-14 Mgt, apresentam os melhores resultados para antocianinas.

  13. At the Dawn of Radio Communications

    Directory of Open Access Journals (Sweden)

    V. P. Samokhin

    2017-01-01

    Full Text Available A brief review of the history of radio communications, which were used before the advent of humanity tubes, in the context of the essays in the series "At the root of media", published in the "History of Technical Progress" section of the supplement to our journal "Science and Education". The review covers the main stages of the development of spark radio-telegraph systems, the creation of the first powerful arc and electric machine generators of non-stopping oscillations of the carrier frequency for radiotelephony and the detection features. The first experiments of Mahlon Loomis, scientific and technical achievements of James Maxwell, Henry Hertz, Eduard Branly, Alexander Popov, Oliver Lodge, Jagadish Bosch, Karl Brown, Lee de Forest, Louis Austin, Herman Simon, William Duddel, Valdemar Paulsen, Ernst Alexander, Valentin Vologdin, Semyon Eisenstein and other creators of the nascent radio engineering. Particular attention is paid to the intersections of their work with the work of Thomas Edison, Nikola Tesla, Guglielmo Marconi, Reginald Fessenden and other heroes of our essays.

  14. Assessing Stream Ecosystem Condition in the United States

    Science.gov (United States)

    Faustini, John M.; Kaufmann, Philip R.; Herlihy, Alan T.; Paulsen, Steven G.

    2009-09-01

    When the U.S. Congress passed the Federal Water Pollution Control Act in 1972, later amended by the Clean Water Act (CWA) of 1977, it tasked the newly created U.S. Environmental Protection Agency (EPA), in cooperation with the states, with periodically assessing the quality of U.S. waters and reporting on progress toward meeting the goals of the CWA. In subsequent decades, reviews by various governmental and nongovernmental organizations consistently have found available water quality data and reporting to be inadequate to evaluate the nation's progress [Shapiro et al., 2008]. In response to these concerns, in 1989 EPA's Office of Research and Development initiated the Environmental Monitoring and Assessment Program (EMAP) to develop and demonstrate scientific tools to monitor the status of, and trends in, U.S. aquatic resources and environmental stressors affecting them. Recent EPA-led efforts involve monitoring wadeable perennial streams (streams or rivers shallow enough to be wadeable during seasonal low flows), which make up an estimated 90% of the total length of all perennial flowing waters in the United States [EPA, 2006]. Selected results from the first national survey of these streams, the national Wadeable Streams Assessment (WSA) [EPA, 2006; Paulsen et al., 2008], illustrate how such surveys can provide critical information to guide management of this important resource. Nonmonitoring applications of data from the WSA and earlier regional surveys show the wide-ranging applicability of these rich data sets.

  15. Pruning management of Chardonnay grapevines at high altitude in Brazilian southeast

    Directory of Open Access Journals (Sweden)

    Tania dos Reis Mendonça

    2016-03-01

    Full Text Available ABSTRACT The agronomical responses of Chardonnay, a variety indicated for sparkling wine production, is influenced by the vineyard management and the edaphoclimatic conditions of the region. The objective of this study was to evaluate the effects of two pruning types (Royat and double Guyot on vegetative and reproductive development of Chardonnay vine growing at high altitude in the Brazilian southeastern region. The experiment was carried out in a commercial vineyard located at 1,280 m of altitude in Divinolândia, São Paulo State, Brazil. The Chardonnay vines (clone 96, grafted onto 1103 Paulsen rootstock and trained in a vertical shoot positioning trellis system, were assessed. Vegetative vigor, bud fruitfulness, production and physicochemical composition of grapes were evaluated during 2014 and 2015 growing seasons. The Royat pruning induced higher vegetative vigor and increased the bud fruitfulness, the cluster number and the productivity of Chardonnay vine when compared to Guyot pruning. Even though the increase on yield was observed, there was no effect of pruning type on grape final quality. Therefore, the choice of pruning method in function of variety genetic characteristics and their interaction with environment can optimize the vineyard profitability. In the Brazilian southeast, the Royat system is the most suitable one to grow Chardonnay for sparkling wines production.

  16. Combinatorial algebra syntax and semantics

    CERN Document Server

    Sapir, Mark V

    2014-01-01

    Combinatorial Algebra: Syntax and Semantics provides a comprehensive account of many areas of combinatorial algebra. It contains self-contained proofs of  more than 20 fundamental results, both classical and modern. This includes Golod–Shafarevich and Olshanskii's solutions of Burnside problems, Shirshov's solution of Kurosh's problem for PI rings, Belov's solution of Specht's problem for varieties of rings, Grigorchuk's solution of Milnor's problem, Bass–Guivarc'h theorem about the growth of nilpotent groups, Kleiman's solution of Hanna Neumann's problem for varieties of groups, Adian's solution of von Neumann-Day's problem, Trahtman's solution of the road coloring problem of Adler, Goodwyn and Weiss. The book emphasize several ``universal" tools, such as trees, subshifts, uniformly recurrent words, diagrams and automata.   With over 350 exercises at various levels of difficulty and with hints for the more difficult problems, this book can be used as a textbook, and aims to reach a wide and diversified...

  17. National Strategies to Harness Information Technology Seeking Transformation in Singapore, Finland, the Philippines, and South Africa

    CERN Document Server

    Knight, Peter

    2012-01-01

    The ability to harness Information Communication Technologies (ICTs) is increasingly at the heart of competitiveness and sustainable growth. As countries engage in an increasingly competitive global economy, they are trying to weave ICT into their development strategies, in the same way enterprises have learned to use ICT to transform their business models and strategies. This integration offers a new path to development that is responsive to the challenges of our times.  In National Strategies to Harness Information Technology, Nagy Hanna and Peter Knight provide a framework for assessing the opportunities, challenges, and prospects for “e-transformation” and for analyzing the options and innovations adopted to manage the e-transformation process.  They ask hard questions: what does it take to harness ICT to transform an economy?  Why some countries accelerate their development journey with ICT while others fail?  How did successful countries balance the need for strategic leadership with bottom up ...

  18. Säg något intressant! : En kvalitativ studie av marknadskommunikation på Facebook

    OpenAIRE

    Johansson, Elin; Johansson, Hanna; Nilsson, Camilla

    2011-01-01

    ABSTRACT Elin Johansson, Hanna Johansson, Camilla Nilsson Say something interesting! A qualitative study of marketing communication on Facebook                               Pages: 36 With the emergence of social media, new ways has been created for companies to reach out to its audience. From being dependent on journalists to provide information, companies today have the ability to self-publish information in the open media channels. The use of social media should not replace traditional mar...

  19. New learning resource features CERN

    CERN Multimedia

    Katarina Anthony

    2011-01-01

    A new educational website, STEM Works, has been launched this month, presenting science and technology in an industrial context for students aged 11-14. Developed with contributions from CERN, the site highlights the Laboratory as a “real-world” example of the opportunities available to science graduates. While the site was developed in Northern Ireland, STEM Works addresses issues of global relevance.   Students share their projects with Steve Myers, Richard Hanna (CCEA), and Catriona Ruane (Education Minister). STEM stands for Science, Technology, Engineering and Mathematics – the four cornerstones of the curriculum featured on the STEM Works website. It is part of a nationwide push in Northern Ireland to highlight how important STEM subjects are to both academia and industry. CERN worked closely with the Northern Ireland Council for the Curriculum, Examinations and Assessment (CCEA) to develop educational content for the site. “The CCEA STEM Works site i...

  20. Instrumentation and process control development for in situ coal gasification. Fourth quarterly report, September--November 1975

    Energy Technology Data Exchange (ETDEWEB)

    Northrop, D.A. (ed.)

    1976-01-01

    The instrumentation effort for Phases 2 and 3 of the Second Hanna In Situ Coal Gasification Experiment was fielded and background data obtained prior to the initiation of Phase 2 on November 25, 1975. A total of over 600 channels of instrumentation in 15 instrumentation wells and two surface arrays was fielded for the instrumentation techniques under evaluation. The feasibility of the passive acoustic technique to locate the source of process-related noises has been demonstrated; its utility is presently hampered by the inexact definition of signal arrivals and the lack of automated signal monitoring and analysis systems. A revised mathematical model for the electrical techniques has been developed which demonstrates the potential for remote monitoring. (auth)

  1. Radiation budget measurement/model interface

    Science.gov (United States)

    Vonderhaar, T. H.; Ciesielski, P.; Randel, D.; Stevens, D.

    1983-01-01

    This final report includes research results from the period February, 1981 through November, 1982. Two new results combine to form the final portion of this work. They are the work by Hanna (1982) and Stevens to successfully test and demonstrate a low-order spectral climate model and the work by Ciesielski et al. (1983) to combine and test the new radiation budget results from NIMBUS-7 with earlier satellite measurements. Together, the two related activities set the stage for future research on radiation budget measurement/model interfacing. Such combination of results will lead to new applications of satellite data to climate problems. The objectives of this research under the present contract are therefore satisfied. Additional research reported herein includes the compilation and documentation of the radiation budget data set a Colorado State University and the definition of climate-related experiments suggested after lengthy analysis of the satellite radiation budget experiments.

  2. Principles of Lasers

    CERN Document Server

    Svelto, Orazio

    2010-01-01

    This new Fifth Edition of Principles of Lasers incorporates corrections to the previous edition. The text’s essential mission remains the same: to provide a wide-ranging yet unified description of laser behavior, physics, technology, and current applications. Dr. Svelto emphasizes the physical rather than the mathematical aspects of lasers, and presents the subject in the simplest terms compatible with a correct physical understanding. Praise for earlier editions: "Professor Svelto is himself a longtime laser pioneer and his text shows the breadth of his broad acquaintance with all aspects of the field … Anyone mastering the contents of this book will be well prepared to understand advanced treatises and research papers in laser science and technology." (Arthur L. Schawlow, 1981 Nobel Laureate in Physics) "Already well established as a self-contained introduction to the physics and technology of lasers … Professor Svelto’s book, in this lucid translation by David Hanna, can be strongly recommended for...

  3. Journeying as Amateur and Professional – A Somatic Movement Approach

    Directory of Open Access Journals (Sweden)

    Martha Eddy

    2016-07-01

    Full Text Available This account is an interactive case study co-authored by a teacher and her student on the topic of moving from amateur to professional. It highlights the role of somatic education in equalizing the experience of amateurs and professionals as well as pointing to specific curricula, public performances, participatory events and volunteer work that are made uniquely available to students of programs related to Dynamic EmbodimentTM Somatic Movement Therapy (known as the Somatic Movement Therapy Training – SMTT from 1991-2005. Written in first-person narrative style (Powdermaker 1966, this inquiry supports the primary methodology of somatic education – the process of self-discovery “from within” (Hanna 1976 emphasizing the physical body with a focus on bodily proprioception and kinesthetic awareness – as well as the humanistic nature of the student-teacher relationship and the value of each in performance and education.

  4. Analiza psychokrytyczna poezji Stanisława Barańczaka

    Directory of Open Access Journals (Sweden)

    Katarzyna Mulet

    2011-01-01

    Full Text Available The article is an attempt at a new reading of Stanisław Barańczak’s poetry by using Charles Mauron’s psychocritical method. Four volumes of poems are subjected to analysis, in which the writer’s obsessive metaphors are extracted, allowing the unveiling of his personal myth. It turns out that the romantic hero complex is underlying this myth, that defines the poet’s way of expression of traumatic experiences from his life. Then, the way of recording of such experiences as enslavement by the totalitarian system, alienation in exile, or Parkinson’s disease, is interpreted according to Hanna Segal’s psychoanalytic theory. Barańczak’s writing is gaining then the title of reparation, it becomes a way to recover lost objects from the past by the writer: freedom, stabilization, health, but also the past time, places, events and people.

  5. „Ludzie i książki. Studia i szkice bibliologiczno-biograficzne. Księga pamiątkowa dedykowana Profesor Hannie Tadeusiewicz”, Łódź, Wydawnictwo Ibidem, 2011, ISBN 978-83-62331-12-3.

    Directory of Open Access Journals (Sweden)

    Magdalena Przybysz-Stawska

    2012-12-01

    Full Text Available Abstrakt w j. polskim:Tekst stanowi omówienie publikacji, która ukazała się z okazji jubileuszu 45-lecia pracy naukowej Profesor Hanny Tadeusiewicz. Zaprezentowano podział zawartego w książce materiału, jednocześnie charakteryzując pokrótce wybrane teksty. Zwrócono uwagę na walory wydawnictwa i jego cechy formalne. English Abstract:This paper treats about the publication which was printed on opportunity of 45th anniversary of scientific work of prof. Hanna Tadeusiewicz. It was shown the segregation of the included material, equally characterized in short selected texts. The attention was turn into the quality of the publication and its formal features.

  6. „Different horror, same hell“

    Directory of Open Access Journals (Sweden)

    Veronika Springmann

    2005-11-01

    Full Text Available Im vorliegenden Band wird der Themenkomplex „Jüdische Frauen im nationalsozialistischen Lagersystem“ mit Hilfe unterschiedlicher theoretischer Ansätze in den Blick genommen. Es finden sich zum einen Beiträge zu der ersten Phase des Konzentrationslagers Moringen (Jane Caplan, zu jüdischen Frauen in Ravensbrück (Linde Apel, Hanna Herzog und Adi Efrat, in Auschwitz (Na’ama Shik, in Außenlagern (Irmgard Seidel, Hans Ellger, in Transnistrien (Ronit Lentin und in Theresienstadt (Anna Hájková. Zum anderen wird auch die Verarbeitung des Erlebten in der Nachkriegszeit (Christa Schikorra und Sabine Kittel thematisiert. Mit diesem Band gelingt es der Herausgeberin Gisela Bock, einen Überblick über die Bedeutung der Kategorie Geschlecht für das Leben und Überleben im Konzentrationslager zu geben. Darüber hinaus werden unterschiedliche methodische Zugänge zum Umgang mit den Quellen aufgezeigt.

  7. Rio-baldo x Rio-bardo: as veredas do narrador

    Directory of Open Access Journals (Sweden)

    Valéria Castro Fabricius

    2015-12-01

    Full Text Available Este artigo analisa a função do narrador da obra Grande sertão: Veredas de Guimarães Rosa enfocando dois aspectos principais: a ação narrativa como organizadora, afirmadora e reprodutora do universo regional coletivo, ao mesmo tempo, como reveladora e identificadora da individualidade do próprio narrador. Riobaldo apela à memória para narrar e através de suas reminiscências revela-nos quem somos como também revela a si mesmo. Para tanto, utilizamos como suporte teórico os artigos de Walter Benjamin intitulado "O narrador, observações sobre a obra de Nikolai Leskow" e o de Hanna Arendt denominado "Ação". Palavras-chave: Grande sertão: Veredas, narrador, memória, coletivo, individual.

  8. Saúde Pública: do indivíduo à população

    Directory of Open Access Journals (Sweden)

    Anita Guazzelli Bernardes

    2010-01-01

    Full Text Available This article analyzes public health through some historical-theoretical lines that have become possibility conditions to associate health with a logic constituted as a public territory. The public system in the health field has enabled the constitution of masses, epidemics, poverty, and work as intervention objects of the modern State. Those lines circumscribe ways of existence in particular time-spaces, such as the Greek and the European experiences, which approximate the public system to health: public system, health and politics; public system population and epidemics. Such an approach situates certain forms of subjectivation by means of a publicization device, which converts private into public. In this article, Foucauldian conceptual tools have been employed in articulation with Robert Castel¿s and Hanna Arendt¿s thoughts.

  9. "Soy sólo parte de ellos". Hannah Arendt, The Jewish Writings

    Directory of Open Access Journals (Sweden)

    Judith Butler

    2009-01-01

    Full Text Available Los textos que Hanna Arendt dedicó al judaísmo, alrededor de temas como la patria y el nacionalismo, la pertenencia cultural y la cuestión sobre las personas sin estado, constituyen más una exposición de paradojas que textos cerrados. Escéptica en lo que se refiere tanto al asimilacionismo como al sionismo, Arendt aboga por la secularización de la política mientras desmonta la lógica del estado-nación, ya que para ella la común historia de exilio y desposesión abre la vía para la unión de judíos y palestinos, de inmigrantes y apátridas, abriendo el camino al pensamiento judío respecto al concepto de justicia.

  10. Social Media Across the Organization

    DEFF Research Database (Denmark)

    Kampf, Constance Elizabeth; Mohammadreza, Marjan

    2016-01-01

    Social Media studies tend to focus on either internal (Friedl & Verčič, 2011; Huang et al, 2013) or external communication (Briones et al, 2011; Hanna et al, 2011; Saschi, 2012; Byrd, 2012; Kilgour et al, 2015) , rather than addressing social media across the organization. This is problematic...... because of the diversity in perspectives about how social media should be deployed among competing department perspectives in an organization are generally not explicitly considered when internal and external communication are dealt with separately. These diverse perspectives lead to tensions between...... differing needs and practices across the organization that affect the understanding of social media value and use, as well as how social media fits with overall communication strategy planning. To address this issue, we have conceptualized the “Online Reputation Chain” as a metaphor for understanding social...

  11. Dipentyl Phthalate F1 Male rat necropsy data, requested by a ...

    Science.gov (United States)

    This is a dataset, and it has no abstract. See the manuscript for additional information. Gray LE Jr, Furr J, Tatum-Gibbs KR, Lambright C, Sampson H, Hannas BR, Wilson VS, Hotchkiss A, Foster PM. Establishing the "Biological Relevance" of DipentylPhthalate Reductions in Fetal Rat Testosterone Production and Plasma and Testis Testosterone Levels. Toxicol Sci. 2016 Jan;149(1):178-91. doi: 10.1093/toxsci/kfv224. Epub 2015 Oct 9. PubMed PMID: 26454885; PubMed CentralPMCID: PMC4715258. Dipentyl Phthalate F1 Male rat necropsy data from our 2016 publication. These data were requested by a mathematical statistician in NCEA that is using the data for nested BMD calculations for their ongoing assessment of this phthalate. We continue to provide NCEA and other regulatory groups data on the phthalates for their assessments.

  12. Gênero e política no pensamento de Maquiavel 

    OpenAIRE

    Pitkin, Hanna

    2013-01-01

    O texto é parte de uma análise mais ampla da teórica política Hanna Pitkin sobre as relações de gênero na obra de Nicolau Maquiavel. Apresenta uma análise das representações do feminino nos textos do autor florentino. Há um inventário detalhado, no artigo, de quais são as imagens das mulheres e como elas são mobilizadas. Com ele, Pitkin discute as implicações políticas dessas imagens. A oposição entre o masculino e o feminino é apresentada  como um componente importante das compreensões do po...

  13. Gênero e política no pensamento de Maquiavel

    OpenAIRE

    Pitkin, Hannah

    2013-01-01

    O texto é parte de uma análise mais ampla da teórica política Hanna Pitkin sobre as relações de gênero na obra de Nicolau Maquiavel. Apresenta uma análise das representações do feminino nos textos do autor florentino. Há um inventário detalhado, no artigo, de quais são as imagens das mulheres e como elas são mobilizadas. Com ele, Pitkin discute as implicações políticas dessas imagens. A oposição entre o masculino e o feminino é apresentada como um componente importante das compreensões do pod...

  14. Quantum mechanics of the fractional-statistics gas: Random-phase approximation

    International Nuclear Information System (INIS)

    Dai, Q.; Levy, J.L.; Fetter, A.L.; Hanna, C.B.; Laughlin, R.B.

    1992-01-01

    A description of the fractional-statistics gas based on the complete summation of Hartree, Fock, ladder and bubble diagrams is presented. The superfluid properties identified previously in the random-phase-approximation (RPA) calculation of Fetter, Hanna, and Laughlin [Phys. Rev. B 39, 9679 (1989)] are substantially confirmed. The discrepancy between the RPA sound speed and the Hartree-Fock bulk modulus is found to be eliminated. The unusual Hall-effect behavior is found to vanish for the Bose gas test case but not for the fractional-statistics gas, implying that it is physically correct. Excellent agreement is obtained with the collective-mode dispersion obtained numerically by Xie, He, and Das Sarma [Phys. Rev. Lett. 65, 649 (1990)

  15. Efficacy of gamma irradiation on H5N1 for the preparation of hemagglutination Inhibition test antigen

    International Nuclear Information System (INIS)

    Chaisingh, Arunee; Thammasart, Suree; Kamolsiripichaiporn, Somjai; Piadang Nattayana

    2006-09-01

    The result of the efficiencies of gamma irradiation at the dose of 10-60 kGy on highly pathogenic avian influenza virus, H5N1 (Thai isolate) revealed that gamma irradiation at the dose of 10 and 20 kGy could reduce the infectivity of Hanna but gamma irradiation at 30-60 kGy could inactivate H5N1 virus completely. All doses of gamma irradiation used in this experiment had no effect on antigenicity of hemagglutinin protein. Thus, gamma irradiation at the dose of 30- 60 kGy could be use safely for the antigen preparation to detect the antibody against H5N1 virus.

  16. Flow Patterns in the Eastern Chukchi Sea: 2010-2015

    Science.gov (United States)

    Stabeno, Phyllis; Kachel, Nancy; Ladd, Carol; Woodgate, Rebecca

    2018-02-01

    From 2010 to 2015, moorings were deployed on the northern Chukchi Sea at nine sites. Deployment duration varied from 5 years at a site off Icy Cape to 1 year at a site north of Hanna Shoal. In addition, 39 satellite-tracked drifters (drogue depth 25-30 m) were deployed in the region during 2012-2015. The goals of this manuscript are to describe currents in the Chukchi Sea and their relationship to ice and winds. The north-south pressure gradient results in, on average, a northward flow over the Chukchi shelf, which is modified by local winds. The volume transport near Icy Cape (˜0.4 Sv) was ˜40% of flow through Bering Strait and varied seasonally, accounting for >50% of summer and ˜20% of winter transport in Bering Strait. Current direction was strongly influenced by bathymetry, with northward flow through the Central Channel and eastward flow south of Hanna Shoal. The latter joined the coastal flow exiting the shelf via Barrow Canyon. Drifter trajectories indicated the transit from Bering Strait to the mouth of Barrow Canyon took ˜90 days during the ice-free season. Most (˜70%) of the drifters turned westward at the mouth of Barrow Canyon and continued westward in the Chukchi Slope Current. This slope flow was largely confined to the upper 300 m, and although it existed year-round, it was strongest in spring and summer. Drifter trajectories indicated that the Chukchi Slope Current extends as far west as the mouth of Herald Canyon. The remaining ˜30% of the drifters turned eastward or were intercepted by sea ice.

  17. Time Series of Transport and Currents on the Chukchi Shelf: 2010 - 2015

    Science.gov (United States)

    Stabeno, P. J.; Ladd, C. A.; Mordy, C. W.; Sullivan, M. E.

    2016-02-01

    Starting in 2010, NOAA/EcoFOCI in partnership with BOEM, has measured currents and water properties at multiple mooring sites on the Chukchi shelf and slope. Observations began at three sites (C1, C2, C3) off Icy Cape in 2010 and expanded in 2013 to include three sites around Barrow Canyon and two sites northeast of Hanna Shoal. In 2014, a mooring was deployed on the slope (1000 m) northeast of Hanna Shoal. A near-continuous velocity record exists at C2 from August 2010 - September 2015. These velocity data are combined with 40 satellite-tracked drifter trajectories (drogue depth 30 m) and hydrographic transects (2010 - 2015) to examine flow patterns and transport on the eastern Chukchi shelf. Six primary hydrographic transects extending from Pt. Hope (DBO3) to Barrow Canyon (DBO5) were occupied most years. Transport past Icy Cape accounts for 40% of the transport through Bering Strait. Maximum monthly-mean transport (>0.8 Sv) is in July with low interannual variability, while the lowest monthly transports are in December - April with high interannual variability. Currents are significantly correlated with alongshore winds. Satellite-tracked drifters deployed near Bering Strait show onshelf flow at Central Channel. Drifters deployed along the Icy Cape line are transported northeastward, converging to a narrow flow, and mainly exit the shelf through Barrow Canyon. The drifters then travel westward along the slope. In summer, drifters and hydrographic sections delineate the pathways of the nutrient-poor Alaska Coastal Current, and the nutrient-rich water to the west (Bering Sea water and Anadyr water). These data were collected mainly as part of three BOEM funded projects (CHAOZ, CHAOZ-Extension and ArcWEST).

  18. 25 Jahre Empowerment der Frau 25 Years of Female Empowerment

    Directory of Open Access Journals (Sweden)

    Sarah Wittkopp

    2008-07-01

    Full Text Available Anlässlich des 25-jährigen Jubiläums des Ausschusses des Übereinkommens zur Beseitigung jeder Form von Diskriminierung der Frau (United Nations Convention on the Elimination of All Forms of Discrimination against Women, CEDAW wird in dem Buch The Circle of Empowerment eine Bilanz der Arbeit des Vertragsorgans gezogen. Herausgegeben von Hanna Beate Schöpp-Schilling, dem deutschen Mitglied im CEDAW-Ausschuss seit 1989, und Cees Flinterman, dem niederländischen Mitglied seit 2003, enthält der Band Essays und persönliche Reflexionen von ehemaligen oder gegenwärtigen Mitgliedern des CEDAW-Ausschusses und UN-Mitarbeitern. Das Buch eignet sich als Einstieg in und Überblick über die Frauenrechtskonvention für Frauenrechtler/-innen, Wissenschaftler/-innen und Studierende, da es ein differenziertes Bild der Konvention, ihrer Mechanismen und ihrer Umsetzungsprobleme zeichnet. Gleichzeitig werden Hintergründe der tatsächlichen Arbeit eines Vertragsorgans beleuchtet, die sonst verschlossen bleiben.In celebration of the 25-year anniversary of the United Nations Convention on the Elimination of All Forms of Discrimination against Women (CEDAW, the book The Circle of Empowerment analyses the results of the work of this treaty institution. The volume, edited by Hanna Beate Schöpp-Schilling, German member in the CEDAW-commission since 1989, and Cees Flinterman, Dutch member since 2003, contains essays and personal reflections from former and current members of the CEDAW-commission and UN staff. The book is an appropriate introduction into and overview of the convention on women’s rights for activists, scholars, and students because it sketches a differentiated image of the convention, its mechanisms, and problems of implementation. At the same time, the book illuminates the background issues of the treaty institution’s actual work, something that normally remains secret.

  19. „Different horror, same hell“ “Different horror, same hell”

    Directory of Open Access Journals (Sweden)

    Veronika Springmann

    2005-11-01

    Full Text Available Im vorliegenden Band wird der Themenkomplex „Jüdische Frauen im nationalsozialistischen Lagersystem“ mit Hilfe unterschiedlicher theoretischer Ansätze in den Blick genommen. Es finden sich zum einen Beiträge zu der ersten Phase des Konzentrationslagers Moringen (Jane Caplan, zu jüdischen Frauen in Ravensbrück (Linde Apel, Hanna Herzog und Adi Efrat, in Auschwitz (Na’ama Shik, in Außenlagern (Irmgard Seidel, Hans Ellger, in Transnistrien (Ronit Lentin und in Theresienstadt (Anna Hájková. Zum anderen wird auch die Verarbeitung des Erlebten in der Nachkriegszeit (Christa Schikorra und Sabine Kittel thematisiert. Mit diesem Band gelingt es der Herausgeberin Gisela Bock, einen Überblick über die Bedeutung der Kategorie Geschlecht für das Leben und Überleben im Konzentrationslager zu geben. Darüber hinaus werden unterschiedliche methodische Zugänge zum Umgang mit den Quellen aufgezeigt.The volume at hand examines the topic of “Jewish women in the National Socialist camp system” with the help of differing theoretical points of departure. It contains, for example, contributions on the early phase of the concentration camp Moringen (Jane Caplan, on Jewish women in Ravensbrück (Linde Apel, Hanna Herzog, and Adi Efrat, in Auschwitz (Na’ama Shik, and in Theresienstadt (Anna Hájková. Additionally, the contributions attend to the experiences of the survivors in the post war period (Christa Schikorra and Sabine Kittel. Editor Gisela Bock manages to present with this volume a survey of the meaning of the category gender for life and survival in the concentration camps. In addition, the collection presents different methodological avenues of approach to the source material.

  20. Effects of aqueous effluents from in situ fossil fuel processing technologies on aquatic systems. Annual progress report, January 1-December 31, 1979

    Energy Technology Data Exchange (ETDEWEB)

    Bergman, H.L.

    1980-01-04

    This is the third annual progress report for a continuing EPA-DOE jointly funded project to evaluate the effects of aqueous effluents from in situ fossil-fuel processing technologies on aquatic biota. The project is organized into four project tasks: (1) literature review; (2) process water screening; (3) methods development; and (4) recommendations. Our Bibliography of aquatic ecosystem effects, analytical methods and treatment technologies for organic compounds in advanced fossil-fuel processing effluents was submitted to the EPA for publication. The bibliography contains 1314 citations indexed by chemicals, keywords, taxa and authors. We estimate that the second bibliography volume will contain approximately 1500 citations and be completed in February. We compiled results from several laboratories of inorganic characterizations of 19 process waters: 55 simulated in situ oil-shale retort waters; and Hanna-3, Hanna-4B 01W and Lawrence Livermore Hoe Creek underground coal gasification condenser waters. These process waters were then compared to a published summary of the analyses from 18 simulated in situ oil-shale retort waters. We completed this year 96-h flow-through toxicity bioassays with fathead minnows and rainbow trout and 48-h flow-through bioassays with Daphnia pulicaria exposed to 5 oil-shale process waters, 1 tar-sand process water, 2 underground coal gasification condenser waters, 1 post-gasification backflood condenser water, as well as 2 bioassays with fossil-fuel process water constituents. The LC/sub 50/ toxicity values for these respective species when exposed to these waters are given in detail. (LTN)

  1. Draft environmental impact statement: KENETECH/PacifiCorp Windpower Project, Carbon County, Wyoming

    International Nuclear Information System (INIS)

    1995-01-01

    This Draft Environmental Impact Statement assesses the environmental consequences of a proposed windpower development project in Carbon County, between Arlington and Hanna, Wyoming. Public scoping commenced in January 1994. All issues raised during scoping and interdisciplinary team preparation of the analysis are addressed. The proposed project entails the erection of approximately 1,390 wind turbine generators and associated facilities (e.g., roads, substations, distribution and communications lines) by KENETECH Windpower, Inc. A 230-kV transmission line would be built by PacifiCorp, Inc. to connect a proposed substation on Foote Creek Rim near Arlington to the Miner's substation near Hanna. The proposed project would use standard procedures as currently employed by other right-of-way projects, plus additional project-specific and site-specific mitigation measures to ensure that project impacts are minimized on all important resources. Impacts to most resources would be negligible to moderate during the life-of-project. Potentially significant impacts resulting from the project include avian mortality; declining avian populations; threatened, endangered, candidate, and/or state sensitive species mortality and/or habitat loss; disturbance to nearby residents due to noise; changes in visual resources; disturbance of important Native American traditional sites; changes in plant community species composition due to snow redistribution; displacement of big game due to windfarm operation; and loss of sage grouse nesting habitat. The proposed project could also have numerous beneficial impacts including increased revenues generated by taxes, increased employment, and benefits derived from using a nonpolluting resource for electric power generation

  2. Can the default-mode network be described with one spatial-covariance network?

    Science.gov (United States)

    Habeck, Christian; Steffener, Jason; Rakitin, Brian; Stern, Yaakov

    2012-01-01

    The default-mode network (DMN) has become a well accepted concept in cognitive and clinical neuroscience over the last decade, and perusal of the recent literature attests to a stimulating research field of cognitive and diagnostic applications (for example, (Andrews-Hanna, Reidler, Huang, & Buckner, 2010; Koch et al., 2010; Sheline, Barch et al., 2009; Sheline, Raichle et al., 2009; Uddin et al., 2008; Uddin, Kelly, Biswal, Castellanos, & Milham, 2009; Weng et al., 2009; Yan et al., 2009)). However, a formal definition of what exactly constitutes a functional brain network is difficult to come by. In recent contributions, some researchers argue that the DMN is best understood as multiple interacting subsystems (Buckner, Andrews-Hanna, & Schacter, 2008) and have explored modular components of the DMN that have different functional specialization and could to some extent be identified separately (Fox et al., 2005; Harrison et al., 2008; Uddin et al., 2009). Such conception of modularity seems to imply an opposite construct of a ‘unified whole’, but it is difficult to locate proponents of the idea of a DMN who are supplying constraints that can be brought to bear on data in rigorous tests. Our aim in this paper is to present a principled way of deriving a single covariance pattern as the neural substrate of the DMN, test to what extent its behavior tracks the coupling strength between critical seed regions, and investigate to what extent our stricter concept of a network is consistent with the already established findings about the DMN in the literature. We show that our approach leads to a functional covariance pattern whose pattern scores are a good proxy for the integrity of the connections between a medioprefrontal, posterior cingulate and parietal seed regions. Our derived DMN network thus has potential for diagnostic applications that are simpler to perform than computation of pairwise correlational strengths or seed maps. PMID:22668988

  3. Review of modern double beta decay experiments

    Energy Technology Data Exchange (ETDEWEB)

    Barabash, A. S., E-mail: barabash@itep.ru [Institute of Theoretical and Experimental Physics (NRC ”Kurchatov Institute”), B. Cheremushkinskaya 25, Moscow (Russian Federation)

    2015-10-28

    The review of modern experiments on search and studying of double beta decay processes is done. Results of the most sensitive current experiments are discussed. The main attention is paid to EXO-200, KamLAND-Zen, GERDA-I and CUORE-0 experiments. Modern values of T{sub 1/2}(2ν) and best present limits on neutrinoless double beta decay and double beta decay with Majoron emission are presented. Conservative limits on effective mass of a Majorana neutrino (〈m{sub ν}〉 < 0.46 eV) and a coupling constant of Majoron to neutrino (〈g{sub ee}〉 < 1.3 · 10{sup −5}) are obtained. Prospects of search for neutrinoless double beta decay in new experiments with sensitivity to 〈m{sub ν}〉 at the level of ∼ 0.01-0.1 eV are discussed.

  4. Testing Left-Right extensions of the standard model of electroweak interactions with double-beta decay and LHC measurements

    Science.gov (United States)

    Civitarese, O.; Suhonen, J.; Zuber, K.

    2015-07-01

    The minimal extension of the standard model of electroweak interactions allows for massive neutrinos, a massive right-handed boson WR, and a left-right mixing angle ζ. While an estimate of the light (electron) neutrino can be extracted from the non-observation of the neutrinoless double beta decay, the limits on the mixing angle and the mass of the righthanded (RH) boson may be extracted from a combined analysis of the double beta decay measurements (GERDA, EXO-200 and KamLAND-Zen collaborations) and ATLAS data on the two-jets two-leptons signals following the excitation of a virtual RH boson mediated by a heavy-mass neutrino. In this work we shall compare results of both types of experiments, and show that the estimates are not in tension.

  5. Extracting information from 0νββ decay and LHC pp-cross sections: Limits on the left-right mixing angle and right-handed boson mass

    Science.gov (United States)

    Civitarese, O.; Suhonen, J.; Zuber, K.

    2015-10-01

    The existence of massive neutrinos forces the extension of the Standard Model of electroweak interactions, to accommodate them and/or right-handed currents. This is one of the fundamental questions in todays's physics. The consequences of it would reflect upon several decay processes, like the very exotic nuclear double-beta-decay. By the other hand, high-energy proton-proton reactions of the type performed at the LHC accelerator can provide information about the existence of a right-handed generation of the W and Z-bosons. Here we shall address the possibility of performing a joint analysis of the results reported by the ATLAS and CMS collaborations (σ(pp- > 2l + jets)) and the latest measurements of nuclear-double-beta decays reported by the GERDA and EXO collaborations.

  6. Ciudadanas y heroinas antifranquistas: morir por la república española

    Directory of Open Access Journals (Sweden)

    Ana Aguado

    2008-12-01

    Full Text Available This text raises the analysis of historical context and biographical characterization of several women considered as “republican heroines”. This women died because of their anti-Franco identity and their link with Spanish second Republic; that is, because of their political commitment and their defence of freedom. Women who died because of the same Franco violence during both the civil war and the repression developed after the war and the victory of the revolted. The case of photographer Gerda Taro, Robert Capa’s colleague, is analyzed like this; with another few cases of women who died in the postwar, executed because of their antifascist militancy, like Águeda Campos, POUM’s militant executed in 1941, or María Pérez Lacruz, “La Jabalina”, young libertarian executed in 1942.

  7. Characterization of BEGe detectors in the HADES underground laboratory

    Science.gov (United States)

    Andreotti, Erica; Gerda Collaboration

    2013-08-01

    This paper describes the characterization of newly produced Broad Energy Germanium (BEGe) detectors, enriched in the isotope 76Ge. These detectors have been produced in the frame of the GERDA experiment. The aim of the characterization campaign consists in the determination of all the important operational parameters (active volume, dead layer thickness and uniformity, energy resolution, detector stability in time, quality of pulse shape discrimination). A protocol test procedure and devoted set-ups, partially automated, have been developed in view of the large number (∼ 25) of BEGe's detectors to be tested. The characterization is carried out in the HADES underground laboratory, located 225 m below ground (∼ 500 m water equivalent) in Mol, Belgium.

  8. Extracting information from 0νββ decay and LHC pp-cross sections: Limits on the left-right mixing angle and right-handed boson mass

    Energy Technology Data Exchange (ETDEWEB)

    Civitarese, O., E-mail: osvaldo.civitarese@fisica.unlp.edu.ar [Departamento de Física, UNLP, C.C. 67, (1900) La Plata (Argentina); Suhonen, J. [University of Jyvaskyla, Department of Physics, P.O. Box 35, FI-40014 (Finland); Zuber, K. [Department of Physics, TU-University, Dresden (Germany)

    2015-10-28

    The existence of massive neutrinos forces the extension of the Standard Model of electroweak interactions, to accommodate them and/or right-handed currents. This is one of the fundamental questions in todays’s physics. The consequences of it would reflect upon several decay processes, like the very exotic nuclear double-beta-decay. By the other hand, high-energy proton-proton reactions of the type performed at the LHC accelerator can provide information about the existence of a right-handed generation of the W and Z-bosons. Here we shall address the possibility of performing a joint analysis of the results reported by the ATLAS and CMS collaborations (σ(pp− > 2l + jets)) and the latest measurements of nuclear-double-beta decays reported by the GERDA and EXO collaborations.

  9. Conceptions and tendencies of age discrimination and attitudes

    Directory of Open Access Journals (Sweden)

    Fredrik Nils Christian Snellman

    2013-11-01

    Full Text Available This study aims to access and explore tendencies in the conceptualization of age discrimination and the perceived attitudes towards older people in regions of Finland and Sweden. The analysis draws on GERDA survey data (GErontological Regional DAtabase, a repeated cross-sectional study in which data was collected in 2005 and 2010. The results indicate that the conceptions of age discrimination are changing in a positive direction, which is contrary to results shown in the Eurobarometer. On the basis of balance coefficients we show that conceived attitudes towards older people are changing as well, except for individuals in some sub-groups. We discuss the role of political rhetoric in relation to ageing awareness, the (nonindividualization of society and the negotiation of age relations as tentative interpretations that strongly challenge the observed empirical tendencies.

  10. Characterization of BEGe detectors in the HADES underground laboratory

    Energy Technology Data Exchange (ETDEWEB)

    Andreotti, Erica, E-mail: Erica.ANDREOTTI@ec.europa.eu [Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel (Belgium)

    2013-08-01

    This paper describes the characterization of newly produced Broad Energy Germanium (BEGe) detectors, enriched in the isotope {sup 76}Ge. These detectors have been produced in the frame of the GERDA experiment. The aim of the characterization campaign consists in the determination of all the important operational parameters (active volume, dead layer thickness and uniformity, energy resolution, detector stability in time, quality of pulse shape discrimination). A protocol test procedure and devoted set-ups, partially automated, have been developed in view of the large number (∼25) of BEGe's detectors to be tested. The characterization is carried out in the HADES underground laboratory, located 225 m below ground (∼500m water equivalent) in Mol, Belgium.

  11. Should governments in Europe be more aggressive in pushing for gender equality to raise fertility? The second "YES"

    Directory of Open Access Journals (Sweden)

    Livia Sz. Oláh

    2011-02-01

    Full Text Available This paper is based on my contribution to a debate, organized by MPIDR, on the question displayed in the title above. I was asked to present arguments for the "yes"-response (together with Laurent Toulemon, and arguing against the "no"-side represented by Gerda Neyer and Dimiter Philipov. As pointed out in the paper, the most important theoretical reasoning relevant for this question is the gender equity theory. A number of studies provide sound empirical support to it, as discussed in the paper in details, and thereby also a rationale for a positive impact of increased gender equality on fertility. As the dual-earner family is here to stay, and given the well-known negative consequences of long-term very low fertility for a society, pushing for gender equality seems to be a reasonable strategy to be considered aiming for sustainable societal development.

  12. Research and Development Supporting a Next Generation Germanium Double Beta Decay Experiment

    Science.gov (United States)

    Rielage, Keith; Elliott, Steve; Chu, Pinghan; Goett, Johnny; Massarczyk, Ralph; Xu, Wenqin

    2015-10-01

    To improve the search for neutrinoless double beta decay, the next-generation experiments will increase in source mass and continue to reduce backgrounds in the region of interest. A promising technology for the next generation experiment is large arrays of Germanium p-type point contact detectors enriched in 76-Ge. The experience, expertise and lessons learned from the MAJORANA DEMONSTRATOR and GERDA experiments naturally lead to a number of research and development activities that will be useful in guiding a future experiment utilizing Germanium. We will discuss some R&D activities including a hybrid cryostat design, background reduction in cabling, connectors and electronics, and modifications to reduce assembly time. We acknowledge the support of the U.S. Department of Energy through the LANL/LDRD Program.

  13. Measurements of the 40Ar(n, γ)41Ar radiative-capture cross section between 0.4 and 14.8 MeV

    Science.gov (United States)

    Bhike, Megha; Fallin, B.; Tornow, W.

    2014-09-01

    The 40Ar(n, γ)41Ar neutron capture cross section has been measured between 0.4 and 14.8 MeV neutron energy using the activation technique. The data are important for estimating backgrounds in argon-based neutrino and dark-matter detectors and in the neutrino-less double-beta decay search GERDA, which uses liquid argon as cooling and shielding medium. For the first time the 40Ar(n, γ)41Ar cross section has been measured for neutron energies above 1 MeV. Our results are compared to the evaluation ENDF/B-VII.1 and the calculated prediction TENDL-2013. The latter agrees very well with the present results.

  14. Investigating lithological and geophysical relationships with applications to geological uncertainty analysis using Multiple-Point Statistical methods

    DEFF Research Database (Denmark)

    Barfod, Adrian

    The PhD thesis presents a new method for analyzing the relationship between resistivity and lithology, as well as a method for quantifying the hydrostratigraphic modeling uncertainty related to Multiple-Point Statistical (MPS) methods. Three-dimensional (3D) geological models are im...... is to improve analysis and research of the resistivity-lithology relationship and ensemble geological/hydrostratigraphic modeling. The groundwater mapping campaign in Denmark, beginning in the 1990’s, has resulted in the collection of large amounts of borehole and geophysical data. The data has been compiled...... in two publicly available databases, the JUPITER and GERDA databases, which contain borehole and geophysical data, respectively. The large amounts of available data provided a unique opportunity for studying the resistivity-lithology relationship. The method for analyzing the resistivity...

  15. Wilcoxon signed-rank-based technique for the pulse-shape analysis of HPGe detectors

    Science.gov (United States)

    Martín, S.; Quintana, B.; Barrientos, D.

    2016-07-01

    The characterization of the electric response of segmented-contact high-purity germanium detectors requires scanning systems capable of accurately associating each pulse with the position of the interaction that generated it. This process requires an algorithm sensitive to changes above the electronic noise in the pulse shapes produced at different positions, depending on the resolution of the Ge crystal. In this work, a pulse-shape comparison technique based on the Wilcoxon signed-rank test has been developed. It provides a method to distinguish pulses coming from different interaction points in the germanium crystal. Therefore, this technique is a necessary step for building a reliable pulse-shape database that can be used later for the determination of the position of interaction for γ-ray tracking spectrometry devices such as AGATA, GRETA or GERDA. The method was validated by comparison with a χ2 test using simulated and experimental pulses corresponding to a Broad Energy germanium detector (BEGe).

  16. Wilcoxon signed-rank-based technique for the pulse-shape analysis of HPGe detectors

    International Nuclear Information System (INIS)

    Martín, S.; Quintana, B.; Barrientos, D.

    2016-01-01

    The characterization of the electric response of segmented-contact high-purity germanium detectors requires scanning systems capable of accurately associating each pulse with the position of the interaction that generated it. This process requires an algorithm sensitive to changes above the electronic noise in the pulse shapes produced at different positions, depending on the resolution of the Ge crystal. In this work, a pulse-shape comparison technique based on the Wilcoxon signed-rank test has been developed. It provides a method to distinguish pulses coming from different interaction points in the germanium crystal. Therefore, this technique is a necessary step for building a reliable pulse-shape database that can be used later for the determination of the position of interaction for γ-ray tracking spectrometry devices such as AGATA, GRETA or GERDA. The method was validated by comparison with a χ"2 test using simulated and experimental pulses corresponding to a Broad Energy germanium detector (BEGe).

  17. Measurements of the {sup 40}Ar(n, γ){sup 41}Ar radiative-capture cross section between 0.4 and 14.8 MeV

    Energy Technology Data Exchange (ETDEWEB)

    Bhike, Megha, E-mail: megha@tunl.duke.edu [Department of Physics, Duke University, Durham, NC 27708 (United States); Triangle Universities Nuclear Laboratory, Durham, NC 27708 (United States); Fallin, B.; Tornow, W. [Department of Physics, Duke University, Durham, NC 27708 (United States); Triangle Universities Nuclear Laboratory, Durham, NC 27708 (United States)

    2014-09-07

    The {sup 40}Ar(n, γ){sup 41}Ar neutron capture cross section has been measured between 0.4 and 14.8 MeV neutron energy using the activation technique. The data are important for estimating backgrounds in argon-based neutrino and dark-matter detectors and in the neutrino-less double-beta decay search GERDA, which uses liquid argon as cooling and shielding medium. For the first time the {sup 40}Ar(n, γ){sup 41}Ar cross section has been measured for neutron energies above 1 MeV. Our results are compared to the evaluation ENDF/B-VII.1 and the calculated prediction TENDL-2013. The latter agrees very well with the present results.

  18. Measurements of the 40Ar(n, γ41Ar radiative-capture cross section between 0.4 and 14.8 MeV

    Directory of Open Access Journals (Sweden)

    Megha Bhike

    2014-09-01

    Full Text Available The 40Ar(n, γ41Ar neutron capture cross section has been measured between 0.4 and 14.8 MeV neutron energy using the activation technique. The data are important for estimating backgrounds in argon-based neutrino and dark-matter detectors and in the neutrino-less double-beta decay search GERDA, which uses liquid argon as cooling and shielding medium. For the first time the 40Ar(n, γ41Ar cross section has been measured for neutron energies above 1 MeV. Our results are compared to the evaluation ENDF/B-VII.1 and the calculated prediction TENDL-2013. The latter agrees very well with the present results.

  19. Measurement of the neutron-capture cross section of 76Ge and 74Ge below 15 MeV and its relevance to 0 νββ decay searches of 76Ge

    Science.gov (United States)

    Bhike, Megha; Fallin, B.; Krishichayan; Tornow, W.

    2015-02-01

    The neutron radiative-capture cross section of 76Ge was measured between 0.4 and 14.8 MeV using the activation technique. Germanium samples with the isotopic abundance of ∼ 86%76Ge and ∼ 14%74Ge used in the 0 νββ searches by the GERDA and Majorana Collaborations were irradiated with monoenergetic neutrons produced at eleven energies via the 3H (p , n)3He, 2H (d , n)3He and 3H (d , n)4He reactions. Previously, data existed only at thermal energies and at 14 MeV. As a by-product, capture cross-section data were also obtained for 74Ge at neutron energies below 8 MeV. Indium and gold foils were irradiated simultaneously for neutron fluence determination. High-resolution γ-ray spectroscopy was used to determine the γ-ray activity of the daughter nuclei of interest. For the 76Ge total capture cross section the present data are in good agreement with the TENDL-2013 model calculations and the ENDF/B-VII.1 evaluations, while for the 74Ge (n , γ)75Ge reaction, the present data are about a factor of two larger than predicted. It was found that the 74Ge (n , γ)75Ge yield in the High-Purity Germanium (HPGe) detectors used by the GERDA and Majorana Collaborations is only about a factor of two smaller than the 76Ge (n , γ)77Ge yield due to the larger cross section of the former reaction.

  20. Comportamento vegetativo e produtivo de videiras 'Cabernet sauvignon' cultivadas sob cobertura plástica Vegetative growth and yield of 'Cabernet sauvignon' grapevine under overhead plastic covering

    Directory of Open Access Journals (Sweden)

    Clenilso Sehnen Mota

    2008-03-01

    Full Text Available O uso de cobertura plástica no cultivo de videira encontra-se em expansão no Rio Grande do Sul, por ser uma alternativa que visa a proteger as plantas da precipitação pluvial e do granizo. O objetivo deste estudo foi avaliar os impactos de uma cobertura plástica translúcida e impermeável sobre a fenologia, o crescimento (de ramos, folhas, cachos e bagas e a produtividade em videiras 'Cabernet Sauvignon' (Vitis vinifera L., com cinco anos de idade, conduzidas em sistema 'Y', sobre porta-enxerto Paulsen 1103. O experimento, conduzido no município de Caxias do Sul-RS, seguiu o delineamento em blocos ao acaso, tendo os tratamentos sem e com cobertura plástica, com quatro repetições de 15 plantas (unidade experimental. As alterações microclimáticas impostas pela cobertura plástica não foram expressivas para alterar a fenologia da videira. As plantas cultivadas sob cobertura plástica apresentaram maiores valores de comprimento e massa fresca de ramos e de área, e massa seca foliar em comparação às plantas descobertas. O peso e o diâmetro de bagas foram superiores nas videiras cobertas apenas no início do ciclo e não diferiram próximo da colheita. As demais variáveis analisadas não foram afetadas pela cobertura plástica. A cobertura plástica interferiu no crescimento vegetativo das plantas, mas não afetou a produção.There is an increasing adoption of overhead plastic covering for grapevines in the State of Rio Grande do Sul, Southern Brazil, to protect the plants from rain and hail storms. This study was carried out to evaluate the impacts of overhead plastic covering with a translucent and water-proof plastic film on phenological, growth (of branch, leaves, clusters, and berries, and yield attributes of five years old 'Cabernet Sauvignon' grapevines (Vitis vinifera L. on Paulsen 1103 rootstock raised as 'Y' management system. The experiment was carried out in Caxias do Sul, State of Rio Grande do Sul, and followed a

  1. Efeito do porta-enxerto no teor de nutrientes em tecidos da videira "cabernet sauvignon" Effect of rootstock on nutrient content of 'cabernet sauvignon' grapevine tissues

    Directory of Open Access Journals (Sweden)

    Alberto Miele

    2009-12-01

    Full Text Available A nutrição mineral da videira constitui-se em importante fator para a qualidade dos vinhos. Devido a isso, avaliou-se o efeito de porta-enxertos no teor de nutrientes em diferentes tecidos da videira 'Cabernet Sauvignon' (Vitis vinifera L. na Serra Gaúcha. o experimento foi conduzido durante o ciclo vegetativo de 2004/2005, com os porta-enxertos Rupestris du lot, 101-14, 3309, 420A, Kober 5BB, 161-49, So4 e Paulsen 1103, enxertados em 1993 com a cv. 'Cabernet Sauvignon'. o delineamento experimental foi em blocos ao acaso, com oito tratamentos e três repetições, sendo quatro plantas/parcela. Coletaram-se folhas - separando-se os pecíolos dos limbos -, cachos - separando-se as bagas das ráquis - e ramos, os quais foram posteriormente secados em estufa e pesados. Analisaram-se os nutrientes n, P, K, Ca e Mg. os resultados mostram que houve efeito significativo do porta-enxerto nos teores de N, P, K, Ca e Mg no limbo, pecíolo, ráquis e baga da videira 'Cabernet Sauvignon' e que este efeito variou em função do nutriente e do tecido considerado. Entretanto, não houve efeito significativo do porta-enxerto no teor desses nutrientes no ramo da videira. Além disso, a ordem de grandeza do teor dos nutrientes variou em função do tecido avaliado. Assim, os teores de n e de Ca foram maiores no limbo; os de P e K, na ráquis; e o de Mg, no pecíolo.Grapevine mineral nutrition is an important factor influencing wine quality. For this, the effect of rootstocks on the nutrient content in different tissues of 'Cabernet Sauvignon' grapevines (Vitis vinifera L. grown in the Serra Gaúcha region was evaluated. The experiment was carried out during the 2004/2005 vegetative cycle with the rootstocks Rupestris du Lot, 101-14, 3309, 420A, Kober 5BB, 161-49, SO4, and Paulsen 1103. The experimental design was in randomized blocks, with eight treatments, three replicates, four plants/plot. leaves - petioles were separated from the limbs -, clusters - berries

  2. Raleio de cachos em vinhedos de altitude e qualidade do vinho da cultivar Syrah Cluster thinning in high altitude vineyards and wine quality from the cultivar Syrah

    Directory of Open Access Journals (Sweden)

    Leonardo Cury da Silva

    2009-02-01

    Full Text Available O objetivo deste trabalho foi avaliar o efeito de diferentes intensidades de raleio de cachos de uvas (Vitis vinifera L., em vinhedos de altitude, sobre a evolução dos compostos fenólicos durante a maturação da uva. O experimento foi conduzido em São Joaquim, SC, a uma altitude média de 1.230 m, em videiras da cv.Syrah, enxertadas sobre 'Paulsen 1103', conduzidas em espaldeira, em duplo cordão esporonado, espaçadas em 3x1,2 m, com cobertura antigranizo. Os tratamentos de raleio foram definidos de modo a se ter redução da produtividade em 13,3, 26,6 e 40% em relação à produtividade do tratamento controle sem raleio, estimada em 15 Mg ha-1. Os tratamentos foram ajustados quando 50% das bagas encontravam-se em "véraison". Odelineamento foi o de blocos ao acaso, com quatro repetições e 40 plantas por tratamento. As avaliações foram feitas nas safras 2005/2006 e 2006/2007. Avaliou-se a evolução dos compostos fenólicos durante as oito semanas antecedentes à colheita. O raleio de cachos aumentou o conteúdo de antocianinas quando a produtividade estimada foi de 12 Mg ha-1, e melhorou a composição fenólica das bagas, atributos esses favoráveis à produção de vinhos tintos finos de qualidade.The objective of this work was to evaluate the effect of different intensities of cluster thinning in mountain vineyards cv.Syrah on the evolution of phenolic compounds, during grape maturation. The experiment was carried out in the 2005/2006 and 2006/2007 crop seasons, at São Joaquim, SC, Brazil, at an average altitude of 1,230 m, on 'Syrah' grapevines that had been grafted on 'Paulsen 1103' root stock and trained out in vertical trellis system, spaced in 3x1.2 m and protected against hail. The cluster thinning was adjusted in the "veraison" corresponded to 15 Mg ha-1 (control, 13 Mg ha-1, 11 Mg ha-1 and 9 Mg ha-1, in a complete randomized blocks. The evolution of phenolic compounds was evaluated during the eight antecedent weeks to the

  3. Disponibilidade hídrica, radiação solar e fotossíntese em videiras 'Cabernet Sauvignon' sob cultivo protegido Water supply, solar radiation and photosynthesis in 'Cabernet Sauvignon' grapevines under plastic covering

    Directory of Open Access Journals (Sweden)

    Clenilso Sehnen Mota

    2009-06-01

    Full Text Available O objetivo deste trabalho foi avaliar os efeitos da cobertura de videira 'Cabernet Sauvignon' com lona plástica translúcida sobre a disponibilidade de luz e água, a concentração foliar de clorofila e a fotossíntese. As plantas com cinco anos de idade foram conduzidas em sistema 'Y' sobre porta-enxerto Paulsen 1103. O experimento seguiu o delineamento em blocos ao acaso, com dois tratamentos (plantas sem e com cobertura plástica e quatro repetições de 15 plantas (unidade experimental. A cobertura plástica reduziu o suprimento às plantas de radiações ultravioleta (UV, azul, verde, vermelho, vermelho distante e total (300-750 nm, bem como a disponibilidade hídrica nas camadas superficiais do solo (0-30 cm. As plantas cobertas apresentaram maior taxa fotossintética máxima e condutância estomática em relação às plantas descobertas. Os pontos de compensação e de saturação de luz, a eficiência quântica aparente, a respiração no escuro, a concentração foliar de clorofilas e o potencial hídrico foliar de base não foram influenciados pelo uso da cobertura plástica. A cobertura plástica reduziu a radiação e a disponibilidade hídrica nas camadas superficiais do solo, porém favoreceu a assimilação foliar de CO2.The objective of this work was to assess the effects of translucent plastic overhead cover on light and water supply of vineyard and leaf chlorophyll content and photosynthesis in grapevines. Five-year-old 'Cabernet Sauvignon' grapevines (Vitis vinifera L. grafted on Paulsen 1103 rootstock and raised as 'Y' management system were used. The experiment followed a randomized block design, with two treatments (uncovered and covered plants and four replicates of 15 plants (experimental unit. The plastic cover reduced the supply of ultraviolet (UV, blue, green, red, far red, and total (300-750 nm radiation to the plants, as well as the water availability at the superficial soil layers (0-30 cm. Covered plants had

  4. Condições meteorológicas e tipo de solo na composição da uva 'Cabernet Sauvignon' Weather and soil effects on the composition of 'Cabernet Sauvignon' grape

    Directory of Open Access Journals (Sweden)

    Rodrigo Vieira Luciano

    2013-01-01

    Full Text Available O objetivo deste trabalho foi avaliar os efeitos das condições meteorológicas e do tipo de solo sobre características físico-químicas e compostos fenólicos da uva 'Cabernet Sauvignon' (Vitis vinifera. O experimento foi realizado em vinhedo implantado em 2003, enxertado sobre o porta-enxerto 'Paulsen 1103' e conduzido no sistema espaldeira. No vinhedo, foram selecionados dois solos: Cambissolo Háplico e Cambissolo Húmico. O efeito das condições meteorológicas (precipitação e temperatura mínima e máxima do ar foi avaliado nas safras 2008/2009, 2009/2010 e 2010/2011. Foram determinados os atributos físicos e químicos dos solos, os teores de sólidos solúveis, a acidez titulável e o pH do mosto, bem como o índice de polifenóis totais e dos teores de antocianinas e de taninos da uva. Os fatores solo e as condições meteorológicas (safras foram arranjados em esquema fatorial 2x3. Com exceção do teor de polifenóis totais, as condições meteorológicas e o tipo de solo afetam as características físico-químicas da uva 'Cabernet Sauvignon', com efeito mais pronunciado das condições meteorológicas do que do tipo de solo. Menores precipitações e maiores amplitudes térmicas favorecem o acúmulo de sólidos solúveis na uva 'Cabernet Sauvignon'. Maiores precipitações favorecem o aumento da acidez do mosto.The objective of this work was to evaluate the effects of weather and soil type on the physicochemical characteristics and phenolic compounds of the 'Cabernet Sauvignon' grape (Vitis vinifera. The experiment was carried out in a vineyard established in 2003, grafted onto 'Paulsen 1103', and conducted in the cordon system. Two soils were selected in the vineyard: Typic Dystrudepts and Pachic Humudepts. The effect of weather (rainfall, and minimum and maximum temperature was evaluated in the seasons 2008/2009, 2009/2010, and 2010/2011. Soil physical and chemical properties, soluble solids, titratable acidity and pH of the

  5. Influência da altitude na qualidade das uvas 'Chardonnay' e 'Pinot Noir' em Minas Gerais Altitude influence on the quality of 'Chardonnay' and 'Pinot Noir' grapes in the state of Minas Gerais

    Directory of Open Access Journals (Sweden)

    Murillo de Albuquerque Regina

    2010-03-01

    Full Text Available No Sul e Sudeste brasileiros, o excesso de chuvas durante o período de maturação afeta negativamente a qualidade dos vinhos tintos. Por outro lado, estas regiões possuem potencial para a elaboração de espumantes, uma vez que, para a elaboração desta bebida, a uva é colhida antes de completar o amadurecimento. No Estado de Minas Gerais, as condições de verão chuvoso estão presentes em todas as regiões de potencial vitícola, e a variação de altitude entre elas pode exercer influência na composição das uvas. Desta forma, este estudo buscou avaliar o potencial de maturação de uvas 'Chardonnay' e 'Pinot Noir' destinadas à elaboração de espumantes em dois locais de Minas Gerais: Cordislândia (873m e Caldas (1.150m. As plantas foram enxertadas sobre 1.103 Paulsen e conduzidas em espaldeira. Foram avaliados os teores de sólidos solúveis totais, acidez total, ácidos málico e tartárico, e pH do mosto, tamanho e massa das bagas, compostos fenólicos nas cascas e sementes, antocianinas na casca e açúcares solúveis nas bagas, em duas safras consecutivas. As bagas apresentaram maior tamanho e massa quando cultivadas em Caldas. As uvas colhidas em Cordislândia apresentaram maior grau de maturação, sendo observados maior pH, maiores teores de glicose e frutose, e quantidade inferior de acidez e fenólicos totais nas sementes. Os maiores teores de ácido málico presentes nas uvas provenientes de Caldas sugerem que esta região pode ser mais indicada à produção de uvas para elaboração de vinhos espumantes.In the southern and southeastern of Brazil, the excessive rainfall during the maturation period negatively affects the quality of red wines. On the other hand, these regions have great potential for the development of sparklings since that for the elaboration of this drink, the grape is harvested before complete its maturation. In the state of Minas Gerais, the conditions of rainy summer season are present in all

  6. Produtividade e composição físico-química de bagas de cultivares de uva em distintos porta-enxertos Productivity and physicochemical composition of berries of grapevine cultivars grafted onto different rootstocks

    Directory of Open Access Journals (Sweden)

    Renata Vieira da Mota

    2009-06-01

    Full Text Available O objetivo deste trabalho foi avaliar a influência de nove porta-enxertos na produção e composição química das bagas de uvas de mesa e de processamento durante o período de 2006 a 2008 em Caldas, MG. As cultivares Niágara Rosada e Folha de Figo foram enxertadas sobre 'IAC 572', 'IAC 313', 'IAC 766', '420 A', '1103 Paulsen', 'Traviú', '196-17', 'Gravesac' e 'RR 101-14' e submetidas ao delineamento em blocos ao acaso com dez tratamentos (nove porta-enxertos e o pé-franco e quatro repetições. Ambas cultivares apresentaram maior produção sobre 'IAC 572', porém com prejuízo para a qualidade das bagas que apresentaram menor relação sólidos solúveis/acidez, menor teor de antocianinas e de compostos fenólicos e maior acidez. A absorção de potássio foi mais dependente do porta-enxerto em 'Niágara Rosada'; a maior absorção foi com os porta-enxertos 'IAC 766' e 'Traviú'. Videiras enxertadas sobre '196-17' apresentaram o menor teor de potássio nas bagas. 'Niágara Rosada' apresentou produção de 9 kg por planta e elevada relação sólidos solúveis/acidez sobre 'RR 101-14', '420 A' e 'Gravesac'. Entretanto, 'Gravesac' proporcionou maior concentração de antocianinas. 'Folha de Figo' enxertada em '196-17' apresentou elevado teor de sólidos solúveis, antocianinas e fenólicos nas cascas e menor teor de acidez e fenólicos nas sementes, além de produção de 5 kg por planta, estatisticamente semelhante aos porta-enxertos mais produtivos.This work aimed at evaluating the influence of nine rootstocks on the productivity and chemical composition of table and processing grapes from 2006 to 2008 in Caldas, MG. The cultivars Niagara Rosada and Folha de Figo were grafted onto 'IAC 572', 'IAC 313', 'IAC 766', '420 A', '1103 Paulsen', 'Traviú', '196-17', 'Gravesac' and 'RR 101-14' and submitted to a randomized block design with ten treatments (nine rootstocks and ungrafted plant with four replicates. Both cultivars had higher yields

  7. Strength Determinants of Jump Height in the Jump Throw Movement in Women Handball Players.

    Science.gov (United States)

    McGhie, David; Østerås, Sindre; Ettema, Gertjan; Paulsen, Gøran; Sandbakk, Øyvind

    2018-06-08

    McGhie, D, Østerås, S, Ettema, G, Paulsen, G, and Sandbakk, Ø. Strength determinants of jump height in the jump throw movement in women handball players. J Strength Cond Res XX(X): 000-000, 2018-The purpose of the study was to improve the understanding of the strength demands of a handball-specific jump through examining the associations between jump height in a jump throw jump (JTJ) and measures of lower-body maximum strength and impulse in handball players. For comparison, whether the associations between jump height and strength differed between the JTJ and the customarily used countermovement jump (CMJ) was also examined. Twenty women handball players from a Norwegian top division club participated in the study. Jump height was measured in the JTJ and in unilateral and bilateral CMJ. Lower-body strength (maximum isometric force, one-repetition maximum [1RM], impulse at ∼60% and ∼35% 1RM) was measured in seated leg press. The associations between jump height and strength were assessed with correlation analyses and t-tests of dependent r's were performed to determine if correlations differed between jump tests. Only impulse at ∼35% 1RM correlated significantly with JTJ height (p jump height and strength were significantly weaker in the JTJ than in both CMJ tests for all strength measures (p = 0.001-0.044) except one. Maximum strength and impulse at ∼60% 1RM did not seem to sufficiently capture the capabilities associated with JTJ height, highlighting the importance of employing tests targeting performance-relevant neuromuscular characteristics when assessing jump-related strength in handball players. Further, CMJ height seemed to represent a wider range of strength capabilities and care should be taken when using it as a proxy for handball-specific movements.

  8. Condições meteorológicas e tipo de solo na composição da uva 'Cabernet Sauvignon'

    Directory of Open Access Journals (Sweden)

    Rodrigo Vieira Luciano

    2013-01-01

    Full Text Available O objetivo deste trabalho foi avaliar os efeitos das condições meteorológicas e do tipo de solo sobre características físico-químicas e compostos fenólicos da uva 'Cabernet Sauvignon' (Vitis vinifera. O experimento foi realizado em vinhedo implantado em 2003, enxertado sobre o porta-enxerto 'Paulsen 1103' e conduzido no sistema espaldeira. No vinhedo, foram selecionados dois solos: Cambissolo Háplico e Cambissolo Húmico. O efeito das condições meteorológicas (precipitação e temperatura mínima e máxima do ar foi avaliado nas safras 2008/2009, 2009/2010 e 2010/2011. Foram determinados os atributos físicos e químicos dos solos, os teores de sólidos solúveis, a acidez titulável e o pH do mosto, bem como o índice de polifenóis totais e dos teores de antocianinas e de taninos da uva. Os fatores solo e as condições meteorológicas (safras foram arranjados em esquema fatorial 2x3. Com exceção do teor de polifenóis totais, as condições meteorológicas e o tipo de solo afetam as características físico-químicas da uva 'Cabernet Sauvignon', com efeito mais pronunciado das condições meteorológicas do que do tipo de solo. Menores precipitações e maiores amplitudes térmicas favorecem o acúmulo de sólidos solúveis na uva 'Cabernet Sauvignon'. Maiores precipitações favorecem o aumento da acidez do mosto.

  9. Study of the maturation of grapes (Vitis vinifera L. grown in Dois Vizinhos, Paraná

    Directory of Open Access Journals (Sweden)

    Gener Augusto Penso

    2014-12-01

    Full Text Available The edaphoclimatic conditions in Southwest Parana differ from those in traditional wine-growing regions and have a major influence on the organoleptic characteristics of the grapes. Studies of grape maturation under these conditions may enable us to time the supply of raw materials for the elaboration of differentiated wines. This study aimed to quantify the ripening components of the grape cultivars Cabernet Sauvignon, Merlot, Tempranillo, and Sangiovese grapes grown in Dois Vizinhos, PR, during the harvest seasons of 2008/2009 and 2011/2012. The grapevines were performed according to the espalier system and grafted on rootstock R110 (‘Cabernet Sauvignon’ and ‘Merlot’ and Paulsen 1103 (‘Tempranillo’ and ‘Sangiovese’. The ripening of the grapes was monitored every ten days from the beginning of ripening (verasion until harvest. The following variables were evaluated: mass and diameter of berries, total soluble solids (TSS, pH, titratable acidity (TTA, total sugars, estimated alcohol content, anthocyanins, and flavanols. Sangiovese berries showed the greatest weight and diameter in the two years. The TSS was higher in the second year of evaluation for Cabernet Sauvignon and Tempranillo grapes. The pH decreased from the first year to the second for all cultivars. There were no significant differences in ATT among the cultivars. A higher content of flavanols was observed during the first growing season of study than during the second. Tempranillo grapes showed the highest concentration of anthocyanins during both growing seasons. Not all cultivars had enough acidity to permit wine stability and guard time. None of the cultivars required the chaptalization of must, presenting good potential of alcohol production.

  10. Could be the future climate change an opportunity for the winegrowers? The case study of Aglianico wine in southern Italy.

    Science.gov (United States)

    Bonfante, Antonello; Basile, Angelo; Dragonetti, Giovanna; De Lorenzi, Francesca; De Mascellis, Roberto; Gambuti, Angelita; Giorio, Pasquale; Guida, Giampiero; Manna, Piero; Minieri, Luciana; Oliva, Marco; Orefice, Nadia; Terribile, Fabio

    2015-04-01

    Water deficit is a limiting factor to yield production and crop adaptation to future climate conditions. This is true for crops addressed mainly for biomass production (e.g. maize, wheat, etc.) but not for those where the quality is relevant. Specifically, in grapevine water stress (mid or limited) - occurring during specific phenological phases - is a factor to produce good quality wines. It induces for example the production of anthocyanins and aroma precursors. Therefore, the water stress, due to the future increase of temperature and the rainfall decrease, could represent an opportunity to increase winegrowers' incomes. The study was carried out in Campania region (Southern Italy), in an area vocated to high quality wines production (ZOVISA project: Viticultural zoning at farm scale) The study was realized in two different soils (calcisol and cambisol), under the same climate, on Aglianico cultivar, standard clone population on 1103 Paulsen rootstocks placed along a slope of 90 m length with 11% of gradient. The agro-hydrological model SWAP was calibrated and applied to estimate soil-plant water status at the various crop phenological phases for three vintages (2011-2013). Crop water stress index (CWSI) - estimated by the model - was related to physiological measurements (e.g leaf water potential), grape bunches measurements (e.g. sugar content) and wine quality (e.g. tannins). For both soils, the correlation between measurements and CWSI were high (e.g. -0.97** with sugar; 0.895* with anthocyanins in the skins). Then, the model was applied to future climate condition (2021-2051) obtained from statistical downscaling of GCM in order to estimate the effect of the climate on CWSI and hence on vine quality. The results show that the effects of the climate change on the vine quality is dependent by the soil, being relevant to the cambisol and less pronounced to the calcisol, with an expected improvement of wine quality in the cambisol.

  11. The ENVISAT Atmospheric Chemistry mission (GOMOS, MIPAS and SCIAMACHY) -Processing status and data availability

    Science.gov (United States)

    Dehn, Angelika; Brizzi, G.; Barrot, G.; Bovensmann, H.; Canela, M.; Fehr, T.; Laur, H.; Lichtenberg, G.; Niro, F.; Perron, G.; Raspollini, P.; Saavedra de Miguel, L.; Scarpino, G.; Vogel, P.

    The atmospheric chemistry instruments on board the ENVISAT platform (GOMOS, MIPAS and SCIAMACHY) provide a unique dataset of geophysical parameters (e.g.: trace gases, clouds, and aerosol) that allows a comprehensive characterization of the atmosphere's chemical and climatological processes [1]. These instruments started to provide significant science data shortly after the launch of the ENVISAT satellite (March 2002). At the time of writing this paper, these instruments and the whole payload modules are fully working and are well beyond the expected lifetime of 5 years. In addition the orbit control strategy of the platform will be modified starting from 2010, in order to extend the mission lifetime up to 2013 [2]. This means that if no instrument problems will appear, the ENVISAT atmospheric sensors will provide at the end of their life, three separated, but complementary datasets of the most important atmospheric state parameters, spanning a time interval of about 11 years. This represents an extraordinary source of information for the scientific user community, both for the completeness and quality of the data and for the extent of the dataset. The aim of this paper is to present the actual status of the ESA operational atmospheric chemistry dataset provided by the three ENVISAT atmospheric chemistry instruments and the future evolution. The processing and reprocessing status will be described in details for each instrument. The outcomes of the geophysical validation and the planned validation activities will be discussed. Finally the data availability and the source of information will be specified. [1] H. Nett, J. Frerick, T. Paulsen, and G. Levrini, "The atmospheric instruments and their applications: GOMOS, MIPAS and SCIAMACHY", ESA Bulletin (ISSN 0376-4265), No. 106, p. 77 -87 (2001) [2] J. Frerick, B. Duesmann, and M. Canela, "2010 and beyond -The ENVISAT mission extension", Proc. `Envisat Symposium 2007', Montreux, Switzerland, 23-27 April 2007 (ESA SP

  12. Desempenho vitivinícola da Cabernet Sauvignon sobre diferentes porta-enxertos em região de altitude de Santa Catarina Viticultural performance of cabernet sauvignon grafted on different rootstocks in high altitude regions of Santa Catarina state

    Directory of Open Access Journals (Sweden)

    Alberto Fontanella Brighenti

    2011-03-01

    Full Text Available Apesar de os porta-enxertos serem usados primariamente como uma forma de resistência a pragas, eles são uma ligação entre o solo e a copa, e desempenham um papel importante na adaptação da videira a fatores ambientais. O objetivo deste trabalho foi avaliar três porta-enxertos e dois sistemas de condução na produtividade do vinhedo, no crescimento da copa e nas características físicas dos frutos. O experimento foi conduzido em um vinhedo experimental da Epagri - Estação Experimental de São Joaquim, localizada no município de Painel (28°01'02"S e 50°08'57"O, altitude 1.200 m. O trabalho foi executado com a cultivar Cabernet Sauvignon, enxertada sobre Paulsen 1.103 (Vitis berlandieri x Vitis rupestris, Couderc 3309 (Vitis riparia x Vitis rupestris e 1.014-14 Mgt (Vitis riparia x Vitis rupestris, em dois sistemas de condução, espaldeira e manjedoura, com cinco anos de idade, no espaçamento de 3,0 x 1,5 m. O experimento foi avaliado nas safras de 2007/08 e 2008/09. Os tratamentos porta-enxerto e sistema de condução foram arranjados em um fatorial (3 x 2. O delineamento utilizado foi o de blocos ao acaso, com quatro blocos e 20 plantas por parcela. Foram avaliados a área foliar, a produtividade médias das plantas, o índice de Ravaz, o peso de material podado, o peso de cachos, peso de 50 bagas, o número de bagas por cacho, o diâmetro das bagas, os teores de sólidos solúveis, a acidez total, o pH, os teores de antocianinas, o índice de polifenóis totais e os taninos. Plantas enxertadas em Paulsen 1103 apresentaram as menores produtividades e as maiores áreas foliares. 3.309C é o porta-enxerto menos vigoroso e interfere de maneira positiva na frutificação efetiva, pois produz maior número de bagas por cacho e bagas mais pesadas. Os porta-enxertos 1.103P e 101-14 Mgt, apresentam os melhores resultados para antocianinas.Rootstocks are a link between the soil and the scion, they play an important role in vine adaptation

  13. Paleaostress/strain study and its implications for the geodynamic history of the Jabal Akhdar Dome (Oman)

    Science.gov (United States)

    Scharf, Andreas; Amrouch, Khalid; Mattern, Frank

    2016-04-01

    Field observations, including oolite-, styolite, fracture analyses combined with laboratory measurements using calcite twin analysis show a ductile-to-brittle multiple-phase deformation history of the Arabian carbonate platform, ranging from Late Cretaceous to Neogene times. The Arabian carbonate platform, belonging to a passive continental margin since the Late Permian, was the site of the obduction of Tethyan oceanic lithosphere (Semail Ophiolite) during the Late Cretaceous, caused by the northward drift of Africa (Hanna, 1995). After or during the obduction, large parts of the entire nape pile composed of the Arabian platform and the Hawasina/Semail nappes, where folded and exhumed. This led to the exhumation of the Jabal Akhdar Dome. Our oolite samples from the Jabal Akhdar Dome and from below the ophiolite thrust reveal the strain ellipsoid related to the obduction. This strain ellipsoid shows components of pure and simple shear. In the latter case the longest axes of the strain ellipsoid are parallelly oriented to the direction of obduction (NE to SW), which is in good agreement with the direction of obduction as depicted by Hacker et al. (1996) for the study area. The pure-shear component (flattening) is interpreted to be a result of the overburden of the up to 7 km thick oceanic lithosphere. The oolites that are located approximately 200 m below the ophiolite thrust contact provide evidence for ductile deformation during the Late Cretaceous. These results are compared with strain and stress tensors obtained from styolites, calcite twins and fracture analyses, derived from the uppermost part of the Arabian platform of the Jabal Akhdar Dome. Our results show a complex and detailed structural deformation of the post-obduction history of the Jabal Akhdar Dome, including its folding and exhumation. Hanna, S. (1995) Field guide to the Geology of Oman. Ruwi (Historical Association of Oman. 178 pp. Hacker, B.R., Mosenfelder, J.L. & Gnos, E. (1996) Rapid emplacement

  14. Investigation of advanced materials for fusion alpha particle diagnostics

    Energy Technology Data Exchange (ETDEWEB)

    Bonheure, G., E-mail: g.bonheure@fz-juelich.de [Laboratory for Plasma Physics, Association “Euratom-Belgian State”, Royal Military Academy, Avenue de la Renaissance, 30 Kunstherlevinglaan, B-1000 Brussels (Belgium); Van Wassenhove, G. [Laboratory for Plasma Physics, Association “Euratom-Belgian State”, Royal Military Academy, Avenue de la Renaissance, 30 Kunstherlevinglaan, B-1000 Brussels (Belgium); Hult, M.; González de Orduña, R. [Institute for Reference Materials and Measurements (IRMM), Retieseweg 111, B-2440 Geel (Belgium); Strivay, D. [Centre Européen d’Archéométrie, Institut de Physique Nucléaire, Atomique et de Spectroscopie, Université de Liège (Belgium); Vermaercke, P. [SCK-CEN, Boeretang, B-2400 Mol (Belgium); Delvigne, T. [DSI SPRL, 3 rue Mont d’Orcq, Froyennes B-7503 (Belgium); Chene, G.; Delhalle, R. [Centre Européen d’Archéométrie, Institut de Physique Nucléaire, Atomique et de Spectroscopie, Université de Liège (Belgium); Huber, A.; Schweer, B.; Esser, G.; Biel, W.; Neubauer, O. [Forschungszentrum Jülich GmbH, Institut für Plasmaphysik, EURATOM-Assoziation, Trilateral Euregio Cluster, D-52425 Jülich (Germany)

    2013-10-15

    Highlights: ► We examine the feasibility of alpha particle measurements in ITER. ► We test advanced material detectors borrowed from the GERDA neutrino experiment. ► We compare experimental results on TEXTOR tokamak with our detector response model. ► We investigate the detector response in ITER full power D–T plasmas. ► Advanced materials show good signal to noise ratio and alpha particle selectivity. -- Abstract: Fusion alpha particle diagnostics for ITER remain a challenging task. Standard escaping alpha particle detectors in present tokamaks are not applicable to ITER and techniques suitable for fusion reactor conditions need further research and development [1,2]. The activation technique is widely used for the characterization of high fluence rates inside neutron reactors. Tokamak applications of the neutron activation technique are already well developed [3] whereas measuring escaping ions using this technique is a novel fusion plasma diagnostic development. Despite low alpha particle fluence levels in present tokamaks, promising results using activation technique combined with ultra-low level gamma-ray spectrometry [4] were achieved before in JET [5,6]. In this research work, we use new advanced detector materials. The material properties beneficial for alpha induced activation are (i) moderate neutron cross-sections (ii) ultra-high purity which reduces neutron-induced background activation and (iii) isotopic tailoring which increases the activation yield of the measured activation product. Two samples were obtained from GERDA[7], an experiment aimed at measuring the neutrinoless double beta decay in {sup 76}Ge. These samples, made of highly pure (9 N) germanium highly enriched to 87% in isotope Ge-76, were irradiated in real D–D fusion plasma conditions inside the TEXTOR tokamak. Comparison of the calculated and the experimentally measured activity shows good agreement. Compared to previously investigated high temperature ceramic material [8

  15. Lyme disease and pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections (PANDAS: an overview

    Directory of Open Access Journals (Sweden)

    Rhee H

    2012-02-01

    Full Text Available Hanna Rhee1, Daniel J Cameron21Medicine, San Diego, CA, 2Northern Westchester Hospital, Mount Kisco, NY, USAAbstract: Lyme disease (LD is a complex, multisystemic illness. As the most common vector-borne disease in the United States, LD is caused by bacterial spirochete Borrelia burgdorferi sensu stricto, with potential coinfections from agents of anaplasmosis, babesiosis, and ehrlichiosis. Persistent symptoms and clinical signs reflect multiorgan involvement with episodes of active disease and periods of remission, not sparing the coveted central nervous system. The capability of microorganisms to cause and exacerbate various neuropsychiatric pathology is also seen in pediatric autoimmune neuropsychiatric disorders associated with streptococcal infections (PANDAS, a recently described disorder attributed to bacterium Streptococcus pyogenes of group A beta-hemolytic streptococcus in which neurologic tics and obsessive-compulsive disorders are sequelae of the infection. In the current overview, LD and PANDAS are juxtaposed through a review of their respective infectious etiologies, clinical presentations, mechanisms of disease development, courses of illness, and treatment options. Future directions related to immunoneuropsychiatry are also discussed.Keywords: neuroborreliosis, infection, obsessive-compulsive disorder, tic disorder, Borrelia burgdorferi, strep throat

  16. Anthropology of music: Paradigms and perspectives

    Directory of Open Access Journals (Sweden)

    Rašić Miloš

    2016-01-01

    Full Text Available Music represents a relational category, in the sense that people write meaning into it, and later by the means of the same music they write the meaning into other people. Therefore, I regard music as a cultural construct. Music does not possess universal meanings, but it forms its numerous meanings in different cultural environments, as well as in different individual perceptions. In anthropology, music is not studied in relation to its musical characteristics or aesthetical values. Anthropologists study its role in a wider social system, and strive to understand, by analysing the role of music in a society, the social and cultural system it belongs to - musical structure is less important here. The goal of the paper is to give an overview of the paradigms in ethnology and anthropology which have been used in studying music. In addition, a hypothetical-theoretical framework for studying music in institutions is set. Although the theory of hubs, which is presented here as a potential framework for studying music in institutions, is exemplified by traditional music, it can be applied to any genre of music. The basic theoretical framework offered by the authors Nadia Kiwan and Hanna Mainhof has been supplemented by certain parts which the author thought appropriate for studying music in institutions, both in ethnological and anthropological discourse.

  17. „La Movida Madrilena” kā brīvības simbols 80. gadu Spānijā

    OpenAIRE

    Jesajana, Elmīra

    2013-01-01

    Bakalaura darbā tiek pētīts “Movida Madrileña” fenomens un tā ietekme uz sociokulturālajām izmaiņām Spānijā 20.gs. 80. gados. Tā mērķis ir analizēt “Movida Madrileña” kustību kā brīvības izpausmes veidu Spānijā 20.gs. 80. gados. Darbu veido trīs daļas. Teorētiskajā daļā tiek skaidroti tādi abstrakti jēdzieni kā brīvība un simbols. Praktiskajā daļā tiek pielietota Hannas Arendas brīvības teorija, lai izpētītu “Movida Madrileña” kustības izcelsmi un analizētu tās nozīmi sabiedrībā. Darb...

  18. The Struggle of Integration: James Baldwin and Melanie Klein in the Context of Black Lives Matter

    Directory of Open Access Journals (Sweden)

    David W McIvor

    2016-12-01

    Full Text Available Recent killings of unarmed black citizens are a fresh reminder of the troubled state of racial integration in the United States. At the same time, the unfolding Black Lives Matter protest movements and the responses by federal agencies each testify to a not insignificant capacity for addressing social pathologies surrounding the color line. In order to respond to this ambivalent situation, this article suggests a pairing between the work of James Baldwin and that of the psychoanalyst Melanie Klein. I will argue that we cannot fully appreciate the depths of what Baldwin called the “savage paradox” of race without the insights provided by Klein and object relations psychoanalysis. Conversely, Baldwin helps us to sound out the political significance of object relations approaches, including the work of Klein and those influenced by her such as Hanna Segal and Wilfred Bion. In conversation with the work of Baldwin, object relations theory can help to identify particular social settings and institutions that might allow concrete efforts toward racial justice to take root.

  19. Goldstar 2016 Interim Report: Brief Introduction to Urban Dispersion

    Energy Technology Data Exchange (ETDEWEB)

    Neuscamman, Stephanie J. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States). National Atmospheric Release Advisory Center (NARAC)

    2017-05-07

    This section describes ways in which an urban environment can affect the distribution of airborne radiological material. In an urban area, winds at street level are significantly more variable and complex than the prevailing winds above the buildings. Elevated winds may be uniform and representative of the general flow over the surrounding area, but buildings influence the local flow such that the winds below the building heights vary significantly in location and time (Hanna et al 2006). For a release of material near an individual building, the complex effect of the building on the airflow may locally enhance the air concentration of released material in some regions near the building and reduce it in others compared to a release in open terrain. However, the overall effect of an individual building is to induce a rapid enlargement and dilution of an incident plume from an isolated source upwind of the building (Hosker 1984). A plume spreading through an urban environment of multiple buildings will experience enhanced mixing and greater spreading of the contaminant plume in both the vertical and horizontal directions, compared to the same release in open terrain.

  20. The World of Insect Metaphors in Zofia Nałkowska’s Dzienniki czasu wojny [Diaries of Wartime

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    Piotr Krupiński

    2013-01-01

    Full Text Available The main aim of the article is an analysis of entomological motifs in the Nałkowska’s wartime diary. The surprising frequency of these motifs gives an opportunity for a more general discussion: the key context for an explanation of insect metaphors seems to be the tendency, common for modernist authors, to place the concept of humanity in a widely un­derstood philosophy of nature. The rule would also apply for the war, or more generally, for mechanisms of human violence, which Nałkowska subjects in her diary to a peculiar darwinistic representation. Understanding the war as a “naturalistic fact” (Hanna Kirchner’s description results in a gradual blurring of the differences between the violence of nature and the violence of history. The author of the article has identified a similar procedure in Czesław Miłosz’s work, which constitutes a specific counterpoint for Nałkowska’s wartime diary.

  1. The strategic offense initiative? The Soviets and Star Wars

    Energy Technology Data Exchange (ETDEWEB)

    Westwick, Peter J. [History Department, University of Southern California, Los Angles, California (United States)

    2014-05-09

    Historians of the Cold War have paid too little attention to Soviet fears of 'space-strike weapons' - that is, possible offensive uses of President Ronald Reagan's Strategic Defense Initiative. In fifteen years or so, soldiers will no longer shoot rifles but will use some kind of lightning, some sort of a machine emitting a holocaustal electrical beam. Tell me, what can we invent in this line so as to surprise our neighbors?... Alas, we are only capable of imitating and purchasing weapons from others, and we do well if we manage to repair them ourselves. --Fyodor Dostoevsky, A Writer's Diary, 1873. [Khlinov, a physicist]: 'I know that he has made an important discovery concerning the transmission of infra-red rays over a distance.... Heat waves at a temperature of a thousand degrees centigrade transmitted parallel to each other constitute a monstrous weapon of destruction and defense in time of war. The whole secret lies in the transmission of a ray that does not disperse. So far nobody has been able to do this. Judging by your story, Garin has constructed a machine that will do it. If so it is an extremely important discovery.' 'I've been thinking for a long time that this invention smells of higher politics,' said Shelga. --Aleksei Tolstoy, The Garin Death Ray, 1927 (translated by George Hanna)

  2. CICLO DE VIDA ORGANIZACIONAL E CONTROLE GERENCIAL: UMA ANÁLISE DOS ARTIGOS EM PERIÓDICOS INTERNACIONAIS DE CONTABILIDADE

    Directory of Open Access Journals (Sweden)

    Paulo Roberto da Cunha

    2013-12-01

    Full Text Available O objetivo deste estudo é analisar os artigos sobre a abordagem do ciclo de vida organizacional em nível internacional, levantando os principais tópicos associados com os controles gerenciais. Em pesquisa a 67 periódicos, chegou-se a uma amostra inicial de 39 artigos. Após a leitura dos resumos para identificação dos artigos que relacionassem ciclo de vida organizacional com controles gerenciais, a amostra ficou em sete artigos. O periódico internacional de contabilidade que mais publicou artigos relacionados a ciclo de vida organizacional foi o Management Accounting Research. As publicações são recentes, dois artigos em 2005 e três artigos em 2008. Destaca-se que nos artigos publicados em 2008, todos são de autoria ou co-autoria de Hanna Silvola. O pequeno número de estudos encontrados permite que o tema possa ser objeto de mais pesquisas, contribuindo com as organizações, gestores e outros interessados a entender melhor como esses controles são utilizados e se modificam com a evolução da empresa. 

  3. Evidence for accretion of fine-grained rims in a turbulent nebula for CM Murchison

    Science.gov (United States)

    Hanna, Romy D.; Ketcham, Richard A.

    2018-01-01

    We use X-ray computed tomography (XCT) to examine the 3D morphology and spatial relationship of fine-grained rims (FGRs) of Type I chondrules in the CM carbonaceous chondrite Murchison to investigate the formation setting (nebular vs. parent body) of the FGRs. We quantify the sizes, shapes, and orientations of the chondrules and FGRs and develop a new algorithm to examine the 3D variation of FGR thickness around each chondrule. We find that the average proportion of chondrule volume contained in the rim for Murchison chondrules is 35.9%. The FGR volume in relation to the interior chondrule radius is well described by a power law function as proposed for accretion of FGRs in a weakly turbulent nebula by Cuzzi (2004). The power law exponent indicates that the rimmed chondrules behaved as Stokes number Stη > 1 nebular particles in Kolmogorov η scale turbulence. FGR composition as inferred from XCT number appears essentially uniform across interior chondrule types and compositions, making formation by chondrule alteration unlikely. We determine that the FGRs were compressed by the impact event(s) that deformed Murchison (Hanna et al., 2015), resulting in rims that are thicker in the plane of foliation but that still preserve their nebular morphological signature. Finally, we propose that the irregular shape of some chondrules in Murchison is a primary feature resulting from chondrule formation and that chondrules with a high degree of surface roughness accreted a relatively larger amount of nebular dust compared to smoother chondrules.

  4. Paradoxes of ideological privilege – a case study

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    Kaja Kaźmierska

    2014-01-01

    Full Text Available The paper discusses a case study based on Lodz as an industrial city and a biography of a female textile worker who worked in one of textile factories in Lodz between 1975 -1998. In order to analyse the case I have also used other materials – works of historians and sociological research carried out by Hanna Świda-Ziemba in late 1940′s in Lodz. I place the analysed biography in both chronological and social context in order to reconstruct a complete image of Lodz and the world of female textile workers. Lodz, as the industrial city which had not been damaged during World War two became – from the point of view of authorities – the place where main assumptions of the new political deal could come true. Conversely the analyses of empirical data disclose the paradoxes of the system related to the asymmetry between the powerful ideological definition of workers as a leading class and the reality of their lives represented in analysed material.

  5. Coal Technology Program progress report for April 1976

    Energy Technology Data Exchange (ETDEWEB)

    1976-06-01

    In the Hydrocarbonization Research program, two successful experiments were completed in the bench-scale hydrocarbonizer. A settling test at a lower temperature (390/sup 0/F) using 20 percent toluene in Solvent Refined Coal (SRC) Unfiltered Oil (UFO) produced a 30 percent clarified product in 2 hr. Characterization tests include distillation curves for Wilsonville's SRC-UFO and a particle size distribution of Pittsburg and Midway Coal Mining Company's (PAMCO) SRC-UFO. Studies of intermediate-temperature pyrolysis of large blocks have been maintained with char samples continuing to demonstrate pyrophoricity, even after heating to 700/sup 0/C. Simulated distillation analysis of tars produced by the last eight experiments are being compared with those performed at Laramie upon tars produced by the Hanna No. 2 experiment. In Coal-Fueled MIUS, stainless steel tubing to be used in one of the furnace tube bundles was ordered and the bid package for the furnace completed. Tests continued on the coal feed system and with the cold flow fluidized bed model. For the Synthoil process, flow diagrams, material balances, and utilities requirements were completed for the entire facility. For the Hydrocarbonization process, flowsheets were reviewed for compatibility; equipment lists were brought up to date; and utilities requirements were compiled from the individual flowsheets. The char recovery and storage subsystem flowsheet was completed. (auth)

  6. Evaluating controls on fluvial sand-body clustering in the Ferris Formation (Cretaceous/Paleogene, Wyoming, USA)

    Science.gov (United States)

    Hajek, E. A.; Heller, P.

    2009-12-01

    A primary goal of sedimentary geologists is to interpret past tectonic, climatic, and eustatic conditions from the stratigraphic record. Stratigraphic changes in alluvial-basin fills are routinely interpreted as the result of past tectonic movements or changes in climate or sea level. Recent physical and numerical models have shown that sedimentary systems can exhibit self-organization on basin-filling time scales, suggesting that structured stratigraphic patterns can form spontaneously rather than as the result of changing boundary conditions. The Ferris Formation (Upper Cretaceous/Paleogene, Hanna Basin, Wyoming) exhibits stratigraphic organization where clusters of closely-spaced channel deposits are separated from other clusters by intervals dominated by overbank material. In order to evaluate the role of basinal controls on deposition and ascertain the potential for self-organization in this ancient deposit, the spatial patterns of key channel properties (including sand-body dimensions, paleoflow depth, maximum clast size, paleocurrent direction, and sediment provenance) are analyzed. Overall the study area lacks strong trends sand-body properties through the stratigraphic succession and in cluster groups. Consequently there is no indication that the stratigraphic pattern observed in the Ferris Formation was driven by systematic changes in climate or tectonics.

  7. Suffering Daughters and Wives. Sentimental Themes in Finnish and Nordic Realism

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    Saija Isomaa

    2010-10-01

    Full Text Available This article examines sentimental themes and scenarios in Nordic nineteenthcentury literature, focusing on Finnish realism. The main claim of the article is that the treatment of the Woman Question in Nordic literature is thematically connected to French sentimentalism that depicted upper-class women caught in the conflict between personal freedom and familial duties. Typical scenarios were family barrier to marriage and love triangle, in which an unhappily married woman fell in love with another man. French sentimental social novels took a stance on the position of women. Similar themes and scenarios can be found in Nordic nineteenth-century novels and plays. The ‘daughter novel’ tradition from Fredrika Bremer’s The President’s Daughters (1834 to Minna Canth’s Hanna (1886 depict the sufferings of upper-class girls in patriarchal family and society. A Doll’s House (1879 by Henrik Ibsen centers on the theme of conflicting duties, depicting the moral awakening of a doll-like wife, and Papin rouva (1893, ‘The Wife of a Clergyman’ by Juhani Aho concentrates on the sufferings and moral considerations of the unhappily married Elli. The article suggests that the sentimentalist legacy informs the Nordic nineteenth-century literature and should be taken into account in the scholarship.

  8. THE INFLUENCE OF SLOW THAWING ON EVOLUTION OF SOME BIOCHEMICAL COMPOUNDS IN FROZEN FISHES

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    Marcel AVRAMIUC

    2017-06-01

    Full Text Available The aim of this work was to study the evolution of pH, amino nitrogen and nitrogen from aminoacids in four fish species, during 48 hours of slow thawing, in order to assess the fish spoilage speed in these keeping conditions. The biological material was represented by frozen fishes (carp, catfish, mackerel and hake which were subjected to slow thawing at room temperature (+20..+22°C, by analysing, at certain time intervals, pH, amino nitrogen - AN (mg %, and nitrogen from aminoacids - NAA (g %. The pH was determined with a digital pH-meter type Hanna, and the nitrogen from aminoacids according to Sörensen method. The amino nitrogen was determined by the difference between the nitrogen content of volatile bases and the nitrogen content of the ammonia and primary amines. As compared to frozen samples, both pH and the amino nitrogen values of all fish samples showed constant and significant increases up to the end of the analyzed period, while the nitrogen from aminoacids only in the first 30 hours of thawing. The amino nitrogen and the nitrogen from amino acids values have indicated the highest spoilage speed in catfish and hake, and the least speed in mackerel.

  9. Using social media for disaster emergency management

    Science.gov (United States)

    Wang, Y. D.; Wang, T.; Ye, X. Y.; Zhu, J. Q.; Lee, J.

    2016-06-01

    Social media have become a universal phenomenon in our society (Wang et al., 2012). As a new data source, social media have been widely used in knowledge discovery in fields related to health (Jackson et al., 2014), human behaviour (Lee, 2014), social influence (Hong, 2013), and market analysis (Hanna et al., 2011). In this paper, we report a case study of the 2012 Beijing Rainstorm to investigate how emergency information was timely distributed using social media during emergency events. We present a classification and location model for social media text streams during emergency events. This model classifies social media text streams based on their topical contents. Integrated with a trend analysis, we show how Sina-Weibo fluctuated during emergency events. Using a spatial statistical analysis method, we found that the distribution patterns of Sina-Weibo were related to the emergency events but varied among different topics. This study helps us to better understand emergency events so that decision-makers can act on emergencies in a timely manner. In addition, this paper presents the tools, methods, and models developed in this study that can be used to work with text streams from social media in the context of disaster management.

  10. Homo faber or homo credente? What defines humans, and what could Homo naledi contribute to this debate?

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    Detlev L. Tönsing

    2017-10-01

    Full Text Available The transition from pre-human to human has, for a long time, been associated with tool use and construction. The implicit self-definition of humans in this is that of planned control over life world. This is reflected on in the work of Hanna Arendt on the homo faber and the novel by Max Frisch of that name. However, this definition has become problematic in a number of ways: Planned tool use has been seen to occur outside the human species, and the focus on control of the environment has become suspect because of the environmental crisis. The burial practices of Homo naledi indicate high-level self-awareness and social communication, with little tool use being evident. This article asks whether this might be an occasion to redefine our conception of what it means to be human away from the focus on mastery and control and towards including trust, also religious trust, as the true mark of humanity.

  11. Assessment of Vaccination with Schistosomules Attenuated by Using Different Doses of γ-Radiation on Experimental Schistosomiasis Mansoni

    International Nuclear Information System (INIS)

    Mohamed, E.N.H.

    2009-01-01

    Schistosomiasis is a major public health problem that affects mainly developing countries. There are 200 million people worldwide infected with schistosomes resulting in more than 250,000 deaths per year (Pacifico et al., 2006). Approximately 85% of the 200 million people infected with schistosomiasis inhabit sub-Saharan Africa (Mungadi and Malami, 2007). It is one of the most important human diseases causing damage for economy and man power in the area where it prevails (Pyrrho et al., 2004). In Egypt, it is one of the major public health problems (El-Khoby et al., 2000). In 1998 El-Khoby et al., reported that at mid 1996 about six million Egyptians infected with a prevalence rate of 11.9% and 5.5% for Schistosoma mansoni and Schistosoma haematobium respectively. It was estimated by the ministry of health in 2002 to be below 5% although some independent researchers were still insisting prevalence was higher in hot villages (Hanna et al., 2005). In human, the nature of the disease is largely immunological and only indirectly due to the parasitic worm itself. The pathological lesions emanate from inflammatory reactions to the large number of parasite eggs which are retained in host tissues rather than excreted with the faeces or urine to infect the snail (Yang, 2008). Its pathology is to create a granulomatous reaction towards the egg that failed to be excreted by the host. The resulting fibrosis can cause hepatomegally in the liver (Moawad, 2003)

  12. Understanding socio-economic impacts of geohazards aided by cyber-enabled systems

    Science.gov (United States)

    Klose, C. D.; Webersik, C.

    2008-12-01

    Due to an increase in the volume of geohazards worldwide, not only are impoverished regions in less developed countries such as Haiti, vulnerable to risk but also low income regions in industrialized countries, e.g. USA, as well. This has been exemplified once again by Hurricanes Gustav, Hanna and Ike and the impact on the Caribbean countries during the summer of 2008. To date, extensive research has been conducted to improve the monitoring of human-nature coupled systems. However, there is little emphasis on improving and developing methodologies to a) interpret multi-dimensional and complex data and b) validate prediction and modeling results. This presentation tries to motivate more research initiatives to address the aforementioned issues, bringing together two academic disciplines, earth and social sciences, to research the relationship between natural and socio-economic processes. Results are presented where cyber-enabled methods based on artificial intelligence are applied to different geohazards and regions in the world. They include 1) modeling of public health risks associated with volcanic gas hazards, 2) prediction and validation of potential areas of mining-triggered earthquakes, and 3) modeling of socio-economic risks associated with tropical storms in Haiti and the Dominican Republic.

  13. The strategic offense initiative? The Soviets and Star Wars

    International Nuclear Information System (INIS)

    Westwick, Peter J.

    2014-01-01

    Historians of the Cold War have paid too little attention to Soviet fears of 'space-strike weapons' - that is, possible offensive uses of President Ronald Reagan's Strategic Defense Initiative. In fifteen years or so, soldiers will no longer shoot rifles but will use some kind of lightning, some sort of a machine emitting a holocaustal electrical beam. Tell me, what can we invent in this line so as to surprise our neighbors?... Alas, we are only capable of imitating and purchasing weapons from others, and we do well if we manage to repair them ourselves. --Fyodor Dostoevsky, A Writer's Diary, 1873. [Khlinov, a physicist]: 'I know that he has made an important discovery concerning the transmission of infra-red rays over a distance.... Heat waves at a temperature of a thousand degrees centigrade transmitted parallel to each other constitute a monstrous weapon of destruction and defense in time of war. The whole secret lies in the transmission of a ray that does not disperse. So far nobody has been able to do this. Judging by your story, Garin has constructed a machine that will do it. If so it is an extremely important discovery.' 'I've been thinking for a long time that this invention smells of higher politics,' said Shelga. --Aleksei Tolstoy, The Garin Death Ray, 1927 (translated by George Hanna)

  14. The use of transcatheter aortic valve replacement vs surgical aortic valve replacement for the treatment of aortic stenosis

    Directory of Open Access Journals (Sweden)

    Jensen HA

    2015-08-01

    Full Text Available Hanna A Jensen, Lillian L Tsai, Vinod H Thourani Division of Cardiothoracic Surgery, Joseph B Whitehead Department of Surgery, Structural Heart and Valve Center, Emory University School of Medicine, Atlanta, GA, USA Abstract: Severe aortic stenosis (AS is associated with considerable morbidity and mortality and is increasing in prevalence as the global population increases. Since AS primarily affects the elderly, many of these patients have comorbidities that make them poor candidates for the gold standard treatment for AS, surgical aortic valve replacement. Transcatheter aortic valve replacement has emerged as a novel technology for the management of AS in higher risk patients over the past decade. Randomized trials have established the safety and efficacy of transcatheter aortic valve replacement, and the medical community has rallied to identify the patients who are most suitable for this transformative treatment. This review focuses on outlining the key procedural differences, describing the unique challenges of both operations, and finally assessing and comparing outcomes both on a general level and in challenging patient subgroups. Keywords: aortic valve replacement, transcatheter aortic valve replacement, surgical aortic valve replacement 

  15. The strategic offense initiative? The Soviets and Star Wars

    Science.gov (United States)

    Westwick, Peter J.

    2014-05-01

    Historians of the Cold War have paid too little attention to Soviet fears of "space-strike weapons" - that is, possible offensive uses of President Ronald Reagan's Strategic Defense Initiative. In fifteen years or so, soldiers will no longer shoot rifles but will use some kind of lightning, some sort of a machine emitting a holocaustal electrical beam. Tell me, what can we invent in this line so as to surprise our neighbors?... Alas, we are only capable of imitating and purchasing weapons from others, and we do well if we manage to repair them ourselves. --Fyodor Dostoevsky, A Writer's Diary, 1873. [Khlinov, a physicist]: "I know that he has made an important discovery concerning the transmission of infra-red rays over a distance.... Heat waves at a temperature of a thousand degrees centigrade transmitted parallel to each other constitute a monstrous weapon of destruction and defense in time of war. The whole secret lies in the transmission of a ray that does not disperse. So far nobody has been able to do this. Judging by your story, Garin has constructed a machine that will do it. If so it is an extremely important discovery." "I've been thinking for a long time that this invention smells of higher politics," said Shelga. --Aleksei Tolstoy, The Garin Death Ray, 1927 (translated by George Hanna)

  16. Germination behavior of Albizia Lebbeck (L. Benth in weakly saline soils in Río Cauto

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    Giosvany Yuriet Oliva Arias

    2013-06-01

    Full Text Available The present study aimed to evaluate the behavior of nursery germination of Albizia lebbeck (L Benth weakly saline soils in the municipality of Río Cauto, Granma Province. The research was conducted in the period from March to June 2012 in the forest nursery Cauto Embarcadero belonging to Río Cauto silvicultural UEB. To determine the germination of the seeds, the germination test performed which consisted in putting to germinate 25 seeds per treatment at 5 for plates with filter paper petris as Treatment 1: added 10 mL of chloride solution sodium (NaCl, adjusted to an electric conductivity of 2 dS m-1 and as treatment 2: a sample pattern with deionized water having an electrical conductivity of 0, 02 dS.m-1 counts were performed daily until the 30 days. The electrical conductivity was measured with the brand portable conductivity meter HANNA HI 9033 multi-range model. Four treatments were studied: a standard with no saline growing medium and three growing media evaluated as weakly saline in a range of 1 to 2 dS m-1. Statistical analysis showed that there were no significant differences between treatments.

  17. The impact of pelvic floor muscle training on the quality of life of women with urinary incontinence: a systematic literature review

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    Radzimińska A

    2018-05-01

    Full Text Available Agnieszka Radzimińska, Agnieszka Strączyńska, Magdalena Weber-Rajek, Hanna Styczyńska, Katarzyna Strojek, Zuzanna Piekorz Department of Physiotherapy, Nicolaus Copernicus University Collegium Medicum in Bydgoszcz, Bydgoszcz, Poland Purpose: The purpose of this review was to assess the effectiveness of pelvic floor muscle training (PFMT in the treatment of urinary incontinence (UI in women, with a particular focus on the impact of this form of therapy on the patients’ quality of life (QoL. Methods: The following electronic databases were searched: PubMed, Embase, and Cochrane Library (articles only in English, 1990–2017. Search terms were as follows: urinary incontinence, pelvic floor muscle training, pelvic floor exercises, quality of life. Systematic review methods were based on the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. Results: The assessment of the impact of PFMT on the QoL of women with UI was conducted among 2,394 women in 24 selected studies. After the end of treatment, the majority of patients in the experimental groups noted a statistically significant improvement in QoL. Conclusion: The results of this literature review demonstrate that PFMT is an effective treatment for UI in women. PFMT significantly improves the QoL of women with UI, which is an important determinant of their physical, mental, and social functioning. Keywords: urinary incontinence, pelvic floor muscle training, quality of life

  18. Children with autism spectrum disorders and selective mutism

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    Steffenburg H

    2018-05-01

    Full Text Available Hanna Steffenburg, Suzanne Steffenburg, Christopher Gillberg, Eva Billstedt Gillberg Neuropsychiatry Centre, Institute of Neuroscience and Physiology, University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden Background: It has been suggested that autism spectrum disorder (ASD might be a “comorbid” condition in selective mutism (SM. Methods: In this retrospective study, we examined medical records of children with SM diagnosis (n=97 at a medical center specializing in assessment of ASD. Results: Mean age for onset of SM symptoms was 4.5 years and mean age at SM diagnosis was 8.8 years. SM was more common among girls (boy:girl ratio=2.7:1. We found that 63% of the study group had an ASD (no gender difference. The SM group with combined ASD had later onset of symptoms, higher age at diagnosis, more often a history of speech delay, and a higher proportion of borderline IQ or intellectual disability.Conclusion: The results highlight the risk of overlap between ASD and SM. Keywords: selective mutism, autism spectrum disorders, Asperger syndrome, autistic disorder

  19. PROMETEUS 17, ANO 8

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    Os Editores da Prometeus

    2015-04-01

    Full Text Available A Prometeus chega ao seu número 17 e seu oitavo ano. Nessa edição, temos uma excelente seleção de artigos.Focalizando a filosofia antiga, temos Lethícia Ouro, Bruno Karl, Irley Franco, Leonidas Konstantakos, Helena Maronna, Miguel Ángel Rossi.Em artigo especial, Rodrigo Brito lida com a filosofia judaica de Abrahan Cohen.A filosofia contemporânea é abordada por Antonio Baptista Gonçalves, que trata de Deleuze, e Paulo Sérgio Calvet, que  trata de Hanna Arendt.Nossa edição se encerra com três traduções: uma de Boécio (William Piauí, uma de Tomás de Aquino (Húdson Canuto e uma de Eurídepdes (Evandro Luis SalvadorDesejamos que os pesquisadores se beneficiem com os trabalhos que selecionamos.Os Editores 

  20. democrático

    Directory of Open Access Journals (Sweden)

    Adelia Maria Miglievich Ribeiro

    2006-01-01

    Full Text Available Starting from Hanna Arendt’s concept of action as freedom that makes possible the construction of the public space, the article discusses the dignity of politics expressed in the exercise of power as an inherent element of the human condition. In this sense, it distinguishes power from coercion and relates it to the idea of participation in community life, of which nobody should be deprived if they are to be able to fulfill themselves as human beings. The degradation of politics is expressed in the suppression of action and thus of power. In the view of Boaventura de Souza Santos, this jeopardizes the “modern social contract”, demanding its renewal through the public power’s commitment to the consolidation of processes of social inclusion. The author argues that such a redefinition of the public agenda implies the recognition of the “other” as a human being and that this perception, according to Charles Taylor, is not as obvious as it seems because of the socially made moral classifications. To promote citizenship is to provide the totality of individuals with the human condition. This assumption suggests a perception of the dignity of human life in any circumstances. The recognition of the “generic other” in their relevance is, however, inseparable from the strengthening of public power in terms of coordinating the market and distributive democracy. Key words: social theory, postmodern critique, social movements.