103 research outputs found
Schever, Albert (Death, 1898-10-17)
No full textAddress: 1400 Main St.Age at death: 32 yrs.Pg 92/1898/222/M W M/Ind./Dr. L. A. Turner/Isadore Wormus/German Protestant Cem.Original record filed in drawer labeled 'SCHAW-SCHILLEN'
Schever, Nicholine (Birth, 1878-11-20)
No full textAddress: 117 Front St.6402/Pg 174/1878/M W/Ger./Ger./Jane Miller, Mid.Original record filed in drawer labeled 'SCHAW-SCHILLEN'
Shedding light on the taxonomic diversity of the south american miocene caimans: the status of Melanosuchus fisheri (Crocodylia, Alligatoroidea)
No full textMelanosuchus niger Spix is distributed throughout the Amazon River basin today. The extinct Melanosuchus fisheri Medina from the late Miocene of Venezuela was erected based on two almost complete, but heavily deformed skulls (the holotype MCNC 243 and the referred specimen MCZ 4336), which show morphological differences from each other. The comparison indicates that only the holotype can be referred to Melanosuchus Gray. We propose MCZ 4336 is a representative of the caimanine Globidentosuchus brachyrostris Scheyer, Aguilera, Delfino, Fortier, Carlini, Sánchez, Carrillo-Briceño, Quiroz and Sãnchez-Villagra. Although the taxonomy of M. fisheri is taken into question herein, the classification of the holotype still sustains the hypothesis that the genus is registered in South America since the late Miocene
Muon reconstruction with a geometrical model in JUNO
No full textThe Jiangmen Neutrino Underground Observatory (JUNO) is a 20 kton liquid scintillator detector currently under construction near Kaiping in China. The physics program focuses on the determination of the neutrino mass hierarchy with reactor anti-neutrinos. For this purpose, JUNO is located 650 m underground with a distance of 53 km to two nuclear power plants. As a result, it is exposed to a muon flux that requires a precise muon reconstruction to make a veto of cosmogenic backgrounds viable. Established muon tracking algorithms use time residuals to a track hypothesis. We developed an alternative muon tracking algorithm that utilizes the geometrical shape of the fastest light. It models the full shape of the first, direct light produced along the muon track. From the intersection with the spherical PMT array, the track parameters are extracted with a likelihood fit. The algorithm finds a selection of PMTs based on their first hit times and charges. Subsequently, it fits on timing information only. On a sample of through-going muons with a full simulation of readout electronics, we report a spatial resolution of 20 cm of distance from the detector's center and an angular resolution of 1.6o over the whole detector. Additionally, a dead time estimation is performed to measure the impact of the muon veto. Including the step of waveform reconstruction on top of the track reconstruction, a loss in exposure of only 4% can be achieved compared to the case of a perfect tracking algorithm. When including only the PMT time resolution, but no further electronics simulation and waveform reconstruction, the exposure loss is only 1%
Sub-percent Precision Measurement of Neutrino Oscillation Parameters with JUNO
No full textJUNO is a multi-purpose neutrino observatory under construction in the south of China. This publication presents new sensitivity estimates for the measurement of the ∆m, ∆m, sin, and sin oscillation parameters using reactor antineutrinos, which is one of the primary physics goals of the experiment. The sensitivities are obtained using the best knowledge available to date on the location and overburden of the experimental site, the nuclear reactors in the surrounding area and beyond, the detector response uncertainties, and the reactor antineutrino spectral shape constraints expected from the TAO satellite detector. It is found that the ∆m and sin oscillation parameters will be determined to better than 0.5% precision in six years of data collection. In the same period, the ∆m parameter willbe determined to about 0.2% precision for each mass ordering hypothesis. The new precision represents approximately an order of magnitude improvement over existing constraints for these three parameters
JUNO physics and detector
No full textThe Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector in a laboratory at 700-m underground. An excellent energy resolution and a large fiducial volume offer exciting opportunities for addressing many important topics in neutrino and astro-particle physics. With six years of data, the neutrino mass ordering can be determined at a 3-4 significance and the neutrino oscillation parameters , , and can be measured to a precision of 0.6% or better, by detecting reactor antineutrinos from the Taishan and Yangjiang nuclear power plants. With ten years of data, neutrinos from all past core-collapse supernovae could be observed at a 3 significance; a lower limit of the proton lifetime, years (90% C.L.), can be set by searching for ; detection of solar neutrinos would shed new light on the solar metallicity problem and examine the vacuum-matter transition region. A typical core-collapse supernova at a distance of 10 kpc would lead to inverse-beta-decay events and (300) all-flavor neutrino-proton (electron) elastic scattering events in JUNO. Geo-neutrinos can be detected with a rate of events per year. Construction of the detector is very challenging. In this review, we summarize the final design of the JUNO detector and the key R&D achievements, following the Conceptual Design Report in 2015 (Djurcic et al., 2015). All 20-inch PMTs have been procured and tested. The average photon detection efficiency is 28.9% for the 15,000 MCP PMTs and 28.1% for the 5,000 dynode PMTs, higher than the JUNO requirement of 27%. Together with the m attenuation length of the liquid scintillator achieved in a 20-ton pilot purification test and the transparency of the acrylic panel, we expect a yield of 1345 photoelectrons per MeV and an effective relative energy resolution of in simulations (Abusleme et al., 2021). To maintain the high performance, the underwater electronics is designed to have a loss rate in six years. With degassing membranes and a micro-bubble system, the radon concentration in the 35 kton water pool could be lowered to mBq/m. Acrylic panels of radiopurity ppt U/Th for the 35.4-m diameter liquid scintillator vessel are produced with a dedicated production line. The 20 kton liquid scintillator will be purified onsite with Alumina filtration, distillation, water extraction, and gas stripping. Together with other low background handling, singles in the fiducial volume can be controlled to . The JUNO experiment also features a double calorimeter system with 25,600 3-inch PMTs, a liquid scintillator testing facility OSIRIS, and a near detector TAO
Essays on the Indian Economy: Competitive Pressure, Productivity and Performance.
No full textIndia undertook a drastic economic reform program in 1991, with the significant objectives of removing existing inefficiencies and enhancing global competitiveness. A competitive environment is a prerequisite condition for gaining higher productivity. The main desired role of economic liberalization is to enhance the efficient utilization of inputs with relaxing constraints input use and technology choices and gains from international trade by bringing global competitive pressure to the economy. The dissertation proposes a macro productivity-efficiency analysis while taking care of the inter-linkages in the economy. This is extended to address to a few important issues of the Indian economy, viz. income distribution, poverty, wage inequality between skilled and unskilled labour, returns to education and performance of formal and informal sectors. These above-mentioned issues are captured with the help of three independent essays. The analytical tool is based on a general equilibrium-activity analysis where welfare maximization subject to input and trade constraints results in competitive equilibrium. Competitive input prices reflect factor productivity. Incorporation of input-output framework captures the inter-sectoral linkages. The social accounting matrix (SAM), which plays an important role in establishing inter-linkages in the economy by combining input-output analysis and household income distribution, provides the basic data set for our model.
De onderkant van de arbeidsmarkt vanuit werkgeversperspectief: de rol van percepties bij de selectie van laagopgeleide sollicitatnten
No full textLaagopgeleide Nederlanders hebben moeite om werk te vinden. Het aandeel ongeschoold werk in de totale werkgelegenheid is veel kleiner dan het aandeel laaggeschoolden in de totale beroepsbevolking. Bovendien zullen internationalisering en technologische ontwikkeling er naar verwachting toe leiden dat de vraag- en aanbodverhoudingen op de arbeidsmarkt nog schever worden (Nahuis en De Groot, 2003). RWI (2005a) en CWI (2005) concluderen dat de vraag naar hoogopgeleiden zal toenemen en die naar laagopgeleiden zal afnemen. Minister De Geus waarschuwt voor het gevaar dat een grote groep Nederlanders in de toekomst langdurig langs de kant van de arbeidsmarkt staat Klein Hesselink en Smulders (2005) concluderen dat de situatie thuis, de gezondheid, het welbevinden, de sociale contacten en de vrije tijd van niet-werkenden slechts in geringe mate zijn gerelateerd aan de werkwens en het werkzoekgedrag. Belangrijker is het demotiverende effect dat uitgaat van het behoren tot een kansarme groep op de arbeidsmarkt. Als de kans op een baan te klein is, daalt de werkwens en het werkzoekgedrag. Deze factoren zijn vervolgens weer van invloed op de kans om een baan te vinden. Er is sprake van een vicieuze cirkel. Klein Hesselink en Smulders concluderen op basis hiervan dat het beleid zich vooral moet richten op het motiveren van arbeidsorganisaties om kansarmen op de arbeidsmarkt aan te nemen. De vraagzijde van de markt zou dus meer centraal moeten komen te staan. Dit rapport doet verslag van een onderzoek naar de vraagzijde van de arbeidsmarkt. Centraal staan de percepties van werkgevers bij de selectie van laagopgeleide werknemers. Wat bepaalt of een werkgever een kandidaat wel of juist niet aantrekkelijk vindt voor zijn vacature? Hierbij maken we onderscheid tussen de beslissing om iemand uit te nodigen voor een gesprek en de beslissing om iemand aan te nemen. Het onderzoek is erop gericht om de rol van objectieve factoren zoals leeftijd, werkervaring en opleidingsniveau te scheiden van meer subjectieve kenmerken zoals het uiterlijk van de sollicitant en het gedrag tijdens het sollicitatiegesprek. De invloed van beleidsinstrumenten zoals loonkostensubsidies, ‘no-risk’ polissen voor loondoorbetaling bij ziekte en ‘niet goed geld terug’ garanties wordt ook gemeten
JUNO physics and detector
No full textThe Jiangmen Underground Neutrino Observatory (JUNO) is a 20 kton liquid scintillator detector in a laboratory at 700-m underground. An excellent energy resolution and a large fiducial volume offer exciting opportunities for addressing many important topics in neutrino and astro-particle physics. With six years of data, the neutrino mass ordering can be determined at a 3-4 sigma significance and the neutrino oscillation parameters sin(2 )theta(12), Delta m(21)(2), and vertical bar Delta m(32)(2)vertical bar can be measured to a precision of 0.6% or better, by detecting reactor antineutrinos from the Taishan and Yangjiang nuclear power plants. With ten years of data, neutrinos from all past core-collapse supernovae could be observed at a 3 sigma significance; a lower limit of the proton lifetime, 8.34 x 10(33) years (90% C.L.), can be set by searching for p -> (nu) over barK(+); detection of solar neutrinos would shed new light on the solar metallicity problem and examine the vacuum-matter transition region. A typical core-collapse supernova at a distance of 10 kpc would lead to similar to 5000 inverse-beta-decay events and similar to 2000 (300) all-flavor neutrino-proton (electron) elastic scattering events in JUNO. Geo-neutrinos can be detected with a rate of similar to 400 events per year. Construction of the detector is very challenging. In this review, we summarize the final design of the JUNO detector and the key R&D achievements, following the Conceptual Design Report in 2015 (Djurcic et al., 2015). All 20-inch PMTS have been procured and tested. The average photon detection efficiency is 28.9% for the 15,000 MCP PMTS and 28.1% for the 5000 dynode PMTS, higher than the JUNO requirement of 27%. Together with the >20 m attenuation length of the liquid scintillator achieved in a 20-ton pilot purification test and the >96% transparency of the acrylic panel, we expect a yield of 1345 photoelectrons per MeV and an effective relative energy resolution of 3.02%/root E(MeV) in simulations (Abusleme et al., 2021). To maintain the high performance, the underwater electronics is designed to have a loss rate <0.5% in six years. With degassing membranes and a micro-bubble system, the radon concentration in the 35 kton water pool could be lowered to <10 mBq/m(3). Acrylic panels of radiopurity <0.5 ppt U/Th for the 35.4-m diameter liquid scintillator vessel are produced with a dedicated production line. The 20 kton liquid scintillator will be purified onsite with Alumina filtration, distillation, water extraction, and gas stripping. Together with other low background handling, singles in the fiducial volume can be controlled to similar to 10 Hz. The JUNO experiment also features a double calorimeter system with 25,600 3-inch PMTS, a liquid scintillator testing facility OSIRIS, and a near detector TAO. (JUNO Collaboration
- …
