46 research outputs found
Strategies for Deeper Integration: Case Study of the Baltics
When we talk about international integration, trade and investment, the itâs-all-about-geographic-proximity is a tempting argument to make. While the importance of geographic closeness cannot be denied, empirical evidence suggests existence of other, perhaps equally significant factors that bring countries closer together. The aim of this paper is to sketch some light on an often overlooked aspect of international integration, recently introduced as the ânew regionalismâ paradigm. Based on the proposed âmentoringâ and âthe training groundâ concepts we analyze such integration within the Baltic Sea region, suggesting an alternative approach to international economic convergence
The Power Board of the KM3NeT Digital Optical Module: design, upgrade, and production
The KM3NeT Collaboration is building an underwater neutrino observatory at
the bottom of the Mediterranean Sea consisting of two neutrino telescopes, both
composed of a three-dimensional array of light detectors, known as digital
optical modules. Each digital optical module contains a set of 31 three inch
photomultiplier tubes distributed over the surface of a 0.44 m diameter
pressure-resistant glass sphere. The module includes also calibration
instruments and electronics for power, readout and data acquisition. The power
board was developed to supply power to all the elements of the digital optical
module. The design of the power board began in 2013, and several prototypes
were produced and tested. After an exhaustive validation process in various
laboratories within the KM3NeT Collaboration, a mass production batch began,
resulting in the construction of over 1200 power boards so far. These boards
were integrated in the digital optical modules that have already been produced
and deployed, 828 until October 2023. In 2017, an upgrade of the power board,
to increase reliability and efficiency, was initiated. After the validation of
a pre-production series, a production batch of 800 upgraded boards is currently
underway. This paper describes the design, architecture, upgrade, validation,
and production of the power board, including the reliability studies and tests
conducted to ensure the safe operation at the bottom of the Mediterranean Sea
throughout the observatory's lifespa
Toxicidade de antibiĂłticos no cultivo in vitro da batata em meios semi-sĂłlido e lĂquido Antibiotics toxicity on the in vitro potato cultivation in semi-solid and liquid media
O objetivo deste trabalho foi avaliar os efeitos fitotĂłxicos de antibiĂłticos no crescimento e na taxa de multiplicação in vitro da batata. BrotaçÔes da cultivar Baronesa foram cultivadas em meio de multiplicação de consistĂȘncia semi-sĂłlida e lĂquida. O meio de multiplicação foi formado pelos sais e vitaminas de MS ao qual adicionou-se um dos seguintes antibiĂłticos: ampicilina, cloranfenicol, estreptomicina e tetraciclina, previamente selecionados em razĂŁo da ação bactericida sobre contaminantes da cultura, nas concentraçÔes de 0, 32, 64, 128, 256, 512 e 1.024 mg L-1. Por 21 dias os materiais foram mantidos em sala de crescimento a 25±2°C, 16 horas de luz e fluxo de radiação de 35 ”mol m-2 s-1. Nos tratamentos em que se utilizou meio de cultura lĂquido, os frascos foram mantidos sob constante agitação em mesa agitadora do tipo orbital. A ampicilina foi o Ășnico antibiĂłtico que nĂŁo afetou a sobrevivĂȘncia e o desenvolvimento dos explantes de batata em meio de multiplicação, podendo ser indicada para trabalhos de descontaminação in vitro dessa espĂ©cie. O aumento das concentraçÔes de cloranfenicol, estreptomicina e tetraciclina no meio de cultura apresentou efeitos fitotĂłxicos severos sobre o crescimento e taxa de multiplicação do material vegetal.<br>The objective of this work was to evaluate the effects of antibiotics on the in vitro growth and multiplication rate of potato. Potato explants, cv. Baronesa, were cultivated in semi-solid and liquid multiplication culture medium. The medium was formed by MS salts, vitamins and one of the following antibiotics: ampicillin, chloramphenicol, streptomycin or tetracycline, previously selected by the bactericidal action on some culture contaminants, at 0, 32, 64, 128, 256, 512 and 1,024 mg L-1. Each treatment had three replicates of ten explants. The materials were incubated for 21 days in a growth room at 25±2°C temperature, 16-hour-light and 35 ”mol m-2 s-1 radiation. The flasks with liquid culture medium were kept under continuous agitation in an orbital shaker. Only ampicillin has not affected the survival and the normal development of potato explants in the culture medium, thereby being indicated for decontamination works in vitro of this specie. The increase of the concentrations of chloramphenicol, tetracycline and streptomycin presented severe phytotoxic effects on the growth and multiplication rate of potato explants
Searches for neutrino counterparts of gravitational waves from the LIGO/Virgo third observing run with KM3NeT
International audienceThe KM3NeT neutrino telescope is currently being deployed at two different sites in the Mediterranean Sea. First searches for astrophysical neutrinos have been performed using data taken with the partial detector configuration already in operation. The paper presents the results of two independent searches for neutrinos from compact binary mergers detected during the third observing run of the LIGO and Virgo gravitational wave interferometers. The first search looks for a global increase in the detector counting rates that could be associated with inverse beta decay events generated by MeV-scale electron anti-neutrinos. The second one focuses on upgoing track-like events mainly induced by muon (anti-)neutrinos in the GeV--TeV energy range. Both searches yield no significant excess for the sources in the gravitational wave catalogs. For each source, upper limits on the neutrino flux and on the total energy emitted in neutrinos in the respective energy ranges have been set. Stacking analyses of binary black hole mergers and neutron star-black hole mergers have also been performed to constrain the characteristic neutrino emission from these categories
Searches for neutrino counterparts of gravitational waves from the LIGO/Virgo third observing run with KM3NeT
International audienceThe KM3NeT neutrino telescope is currently being deployed at two different sites in the Mediterranean Sea. First searches for astrophysical neutrinos have been performed using data taken with the partial detector configuration already in operation. The paper presents the results of two independent searches for neutrinos from compact binary mergers detected during the third observing run of the LIGO and Virgo gravitational wave interferometers. The first search looks for a global increase in the detector counting rates that could be associated with inverse beta decay events generated by MeV-scale electron anti-neutrinos. The second one focuses on upgoing track-like events mainly induced by muon (anti-)neutrinos in the GeV--TeV energy range. Both searches yield no significant excess for the sources in the gravitational wave catalogs. For each source, upper limits on the neutrino flux and on the total energy emitted in neutrinos in the respective energy ranges have been set. Stacking analyses of binary black hole mergers and neutron star-black hole mergers have also been performed to constrain the characteristic neutrino emission from these categories
Searches for neutrino counterparts of gravitational waves from the LIGO/Virgo third observing run with KM3NeT
International audienceThe KM3NeT neutrino telescope is currently being deployed at two different sites in the Mediterranean Sea. First searches for astrophysical neutrinos have been performed using data taken with the partial detector configuration already in operation. The paper presents the results of two independent searches for neutrinos from compact binary mergers detected during the third observing run of the LIGO and Virgo gravitational wave interferometers. The first search looks for a global increase in the detector counting rates that could be associated with inverse beta decay events generated by MeV-scale electron anti-neutrinos. The second one focuses on upgoing track-like events mainly induced by muon (anti-)neutrinos in the GeV--TeV energy range. Both searches yield no significant excess for the sources in the gravitational wave catalogs. For each source, upper limits on the neutrino flux and on the total energy emitted in neutrinos in the respective energy ranges have been set. Stacking analyses of binary black hole mergers and neutron star-black hole mergers have also been performed to constrain the characteristic neutrino emission from these categories