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"Castellano, Simone"
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The Annual Modulation Signature for Dark Matter : DAMA/LIBRA-Phase1 Results and Perspectives
2014
The results obtained with the total exposure of 1.04 ton × yr collected by DAMA/LIBRA-phase1 deep underground at the Gran Sasso National Laboratory (LNGS) of the I.N.F.N. during 7 annual cycles are summarized. The DAMA/LIBRA-phase1 and the former DAMA/NaI data (cumulative exposure 1.33 ton × yr, corresponding to 14 annual cycles) give evidence at 9.3 σ C.L. for the presence of Dark Matter (DM) particles in the galactic halo, on the basis of the exploited model independent DM annual modulation signature by using highly radiopure NaI(Tl) target. The modulation amplitude of the single-hit events in the (2–6) keV energy interval is 0.0112±0.0012 cpd/kg/keV; the measured phase is 144±7 days and the measured period is 0.998±0.002 yr; values are in a good well in agreement with those expected for DM particles. No systematic or side reactions able to mimic the exploited DM signature have been found or suggested by anyone over more than a decade. Some of the perspectives of the presently running DAMA/LIBRA-phase2 are outlined.
Journal Article
Discovery of X-ray polarization angle rotation in the jet from blazar Mrk 421
2023
The magnetic-field conditions in astrophysical relativistic jets can be probed by multiwavelength polarimetry, which has been recently extended to X-rays. For example, one can track how the magnetic field changes in the flow of the radiating particles by observing rotations of the electric vector position angle Ψ. Here we report the discovery of a ΨX rotation in the X-ray band in the blazar Markarian 421 at an average flux state. Across the 5 days of Imaging X-ray Polarimetry Explorer observations on 4–6 and 7–9 June 2022, ΨX rotated in total by ≥360°. Over the two respective date ranges, we find constant, within uncertainties, rotation rates (80 ± 9° per day and 91 ± 8° per day) and polarization degrees (ΠX = 10% ± 1%). Simulations of a random walk of the polarization vector indicate that it is unlikely that such rotation(s) are produced by a stochastic process. The X-ray-emitting site does not completely overlap the radio, infrared and optical emission sites, as no similar rotation of Ψ was observed in quasi-simultaneous data at longer wavelengths. We propose that the observed rotation was caused by a helical magnetic structure in the jet, illuminated in the X-rays by a localized shock propagating along this helix. The optically emitting region probably lies in a sheath surrounding an inner spine where the X-ray radiation is released.In June 2022, the IXPE satellite observed a shock passing through the jet of active galaxy Markarian 421. The rotation of the X-ray-polarized radiation over a 5-day period revealed that the jet contains a helical magnetic field.
Journal Article
GINGER Status Report
by
Ciampini, Donatella
,
Giovinetti, Francesco
,
Maccioni, Enrico
in
Angular velocity
,
Earth
,
Geodesy
2025
The GINGER project is based on ring lasers and is under construction at the underground Gran Sasso laboratories, as part of the underground geophysical observatory of Gran Sasso (UGGS). Large frame ring lasers are top sensitivity instruments to measure angular rotation rate, in particular when attached to the Earth crust they can measure with very high precision the Earth angular velocity. This kind of measurements when the precision is of the order of 1 part in 10 9 , are certainly relevant for geophysics and geodesy, for instance to measure the fast variation of the length of Day (LoD), but are also relevant for fundamental physics, since are affected by de Sitter and Lense-Thirring effects and can be used to investigate Lorentz’s violations. Ring lasers ensure long-term continuous operation with record sensitivity. The limit of 1 part in 10 9 of the Earth’s rotation rate has already been demonstrated, and recent sensitivity study has shown that the ring laser shot noise limit is at least a factor 10 better than expected. GINGER and its status report will be described.
Journal Article
Comparative analysis of local angular rotation between the ring laser gyroscope GINGERINO and GNSS stations
by
Devoti, Roberto
,
Di Virgilio, Angela D. V.
,
Maccioni, Enrico
in
Amplitudes
,
Applied and Technical Physics
,
Atomic
2024
The study of local deformations is a hot topic in geodesy. Local rotations of the crust around the vertical axis can be caused by deformations. In the Gran Sasso area, the ring laser gyroscope GINGERINO and the GNSS array are operative. One year of data of GINGERINO is compared with the ones from the GNSS stations, homogeneously selected around the position of GINGERINO, aiming at looking for rotational signals with period of days common to both systems. At that purpose the rotational component of the area circumscribed by the GNSS stations has been evaluated and compared with the GINGERINO data. The coherences between the signals show structures that even exceed 60% coherence over the 6–60 days period; this unprecedented analysis is validated by two different methods that evaluate the local rotation using the GNSS stations. The analysis reveals that the shared rotational signal’s amplitude in both instruments is approximately 10
−13
rad/s, an order of magnitude lower than the amplitudes of the signals examined. The comparison of the ring laser data with GNSS antennas provides evidence of the validity of the ring laser data for very low frequency investigation, essential for fundamental physics test.
Journal Article
High-Density Pixel Imaging Sensor Readout Electronics for Space Applications: A Design Overview
by
Orsini, Leonardo
,
Bachetti, Matteo
,
Pieraccini, Stefano
in
Application-specific integrated circuits
,
Communication
,
Custom integrated circuits
2023
With the specialization of VLSI ASICs for front-end signal processing electronics, the customization of the control back-end electronics (BEE) has become critical to fully deploy the ASIC performance. In the context of space operations, with typical constraints on power and reliability, the design and qualification of such integrated systems present significant challenges. In this paper, we review the design and performance of the BEE systems after two years of operations in low Earth orbit (LEO); these systems read out the custom ASICs inside the gas pixel detectors, which are located at the heart of the imaging X-ray polarimetry explorer (IXPE), a NASA-ASI small explorer mission designed to measure X-ray polarization in the 2–8 keV energy range.
Journal Article
Atividade física e estado nutricional: fator de proteção para Doenças Crônicas Não Transmissíveis (DCNT) em idosas?
by
Conterato Gomes, Igor
,
Castellano, Simone Maria
,
Fortes Freitas Júnior, Ismael
in
Atividade Física
,
Doença Crônica
,
Idoso
2014
Objetivo: Analisar a relação da prática de atividade física e do estado nutricional com as doenças crônicas não transmissíveis (DCNT) em mulheres idosas. Métodos: Estudo observacional, analítico, transversal, amostra por conveniência, amostra de 367 mulheres idosas (60 anos ou mais) das cidades de Presidente Prudente-SP e Uberaba-MG, entre outubro/2010 e agosto/2012. Para identificação das DCNT, utilizou-se um questionário baseado no Standard Health Questionnaire (SHQ), o Questionário Internacional de Atividade Física (IPAQ), para avaliar o nível de atividade física e as variáveis antropométricas para o estado nutricional. Na análise estatística, utilizou-se o teste qui-quadrado para verificar a associação entre o nível de atividade física, segundo estado nutricional e presença de doenças cardiometabólicas, e regressão logística binária para testar a magnitude dessas associações. Resultados: Houve fator de proteção contra a hipertensão para as mulheres consideradas eutróficas ativas (p=0,024) e eutróficas sedentárias (p=0,032) quando comparadas ao grupo de risco (sedentárias e com sobrepeso/obesidade), porém o mesmo não foi observado nas com excesso de peso e consideradas ativas fisicamente (p=0,734). Houve associação positiva entre as idosas eutróficas sedentárias (p=0,047) em relação ao risco para colesterol. Quando observado, o diabetes não obteve associação em nenhum dos grupos. Conclusão: A atividade física não foi considerada como fator de proteção para hipercolesterolemia, diabetes e hipertensão, possivelmente por causa da causalidade reversa, pois, a partir do diagnóstico da doença, essas mulheres, antes sedentárias, iniciaram a prática de atividade física, contribuindo para esses resultados.
Journal Article
DO PHYSICAL ACTIVITY AND NUTRITIONAL STATUS ACT AS PROTECTIVE FACTORS AGAINST NONCOMMUNICABLE CHRONIC DISEASES IN ELDERLY WOMEN?
by
Paulo, Thais Reis Silva
,
Júnior, Ismael Fortes Freitas
,
Gomes, Igor Conterato
in
Actividad Motora
,
Anciano
,
Atividade Física
2015
Objective: To analyze the association of regular physical activity and
nutritional status with chronic noncommunicable diseases (NCDs) in
elderly women. Methods: This is an observational and analytical
cross-sectional study conducted with a convenience sample of 367
elderly women (60 and over) from the cities of Presidente Prudente, SP
and Uberaba, MG, between October/2010 and August/2012. NCDs were
identified using a questionnaire based on the Standard Health
Questionnaire (SHQ). The International Physical Activity Questionnaire
(IPAQ) was used to assess the level of physical activity and
anthropometric variables were used to assess the nutritional status.
Statistical analysis included the chi-square test to verify
associations between physical activity level, according to nutritional
status, and the presence of cardiometabolic diseases, and binary
logistic regression to test the magnitude of these associations.
Results: There was a protective factor against hypertension in active
eutrophic women (p=0.024) and sedentary eutrophic women (p=0.032) when
compared to the risk group (sedentary and overweight/obese women);
however, this was not observed in physically active women with excess
weight (p=0.734). There was a positive association between sedentary
eutrophic elderly women (p=0.047) and the risk of cholesterol. None of
the groups were associated with diabetes. Conclusion: Physical activity
was not considered a protective factor for hypercholesterolemia,
diabetes or hypertension, possibly due to reverse causality given that
sedentary women started the physical activity after the diagnosis of
the disease, which contributed to these results.
Objetivo:Analisar a relação da prática de atividade
física e do estado nutricional com as doenças crônicas
não transmissíveis (DCNT) em mulheres idosas. Métodos:
Estudo observacional, analítico, transversal, amostra por
conveniência, amostra de 367 mulheres idosas (60 anos ou mais) das
cidades de Presidente Prudente-SP e Uberaba-MG, entre outubro/2010 e
agosto/2012. Para identificação das DCNT, utilizou-se um
questionário baseado no Standard Health Questionnaire (SHQ), o
Questionário Internacional de Atividade Física (IPAQ), para
avaliar o nível de atividade física e as variáveis
antropométricas para o estado nutricional. Na análise
estatística, utilizou-se o teste qui-quadrado para verificar a
associação entre o nível de atividade física,
segundo estado nutricional e presença de doenças
cardiometabólicas, e regressão logística binária
para testar a magnitude dessas associações. Resultados:Houve
fator de proteção contra a hipertensão para as mulheres
consideradas eutróficas ativas (p=0,024) e eutróficas
sedentárias (p=0,032) quando comparadas ao grupo de risco
(sedentárias e com sobrepeso/obesidade), porém o mesmo
não foi observado nas com excesso de peso e consideradas ativas
fisicamente (p=0,734). Houve associação positiva entre as
idosas eutróficas sedentárias (p=0,047) em relação
ao risco para colesterol. Quando observado, o diabetes não obteve
associação em nenhum dos grupos.Conclusão:A atividade
física não foi considerada como fator de proteção
para hipercolesterolemia, diabetes e hipertensão, possivelmente
por causa da causalidade reversa, pois, a partir do diagnóstico da
doença, essas mulheres, antes sedentárias, iniciaram a
prática de atividade física, contribuindo para esses
resultados.
Objetivo:Analizar la relación de la práctica de actividad
física y el estado nutricional con las enfermedades crónicas
no transmisibles (ECNT) en mujeres mayores. Métodos:Estudio
observacional, analítico, transversal de muestreo por conveniencia
y muestra de 367 mujeres mayores (60 años o más) de las
ciudades de Presidente Prudente-SP y Uberaba-MG, entre octubre/2010 y
agosto/2012. Se utilizó un cuestionario basado en el Standard
Health Questionnaire (SHQ) para la identificación de las ECNT, el
Cuestionario Internacional de Actividad Física (IPAQ) para evaluar
el nivel de actividad física y las variables antropométricas
para evaluar el estado nutricional. En el análisis
estadístico se utilizó la prueba de Chi-cuadrado para
verificar la asociación del nivel de actividad física
según el estado nutricional y la presencia de enfermedades
cardiometabolicas y la regresión logística binaria para
testar la magnitud de estas asociaciones. Resultados: Se encontró
un factor de protección contra la hipertensión para las
mujeres consideradas eutróficas activas (p=0,024) y
eutróficas sedentarias (p=0,032) al comparar con el grupo de
riesgo (sedentarias y con sobrepeso/obesidad), sin embargo lo mismo no
se ha observado en aquellas con exceso de peso consideradas
físicamente activas (p=0,734). Hubo asociación positiva entre
las mujeres mayores eutróficas sedentarias (p=0,047) y el riesgo
de colesterol. No hubo asociación de la diabetes en ningún de
los grupos.Conclusión:La actividad física no ha sido
considerada como factor de protección para la hipercolesterolemia,
la diabetes y la hipertensión, posiblemente debido la causalidad
reversa, pues a partir del diagnóstico de la enfermedad estas
mujeres, que antes eran sedentarias, empezaron la práctica de
actividad física, contribuyendo con estos resultados.
Journal Article
ATIVIDADE FÍSICA E ESTADO NUTRICIONAL: FATOR DE PROTEÇÃO PARA DOENÇAS CRÔNICAS NÃ;O TRANSMISSÍVEIS (DCNT) EM IDOSAS?
by
Paulo, Thais Reis Silva
,
Júnior, Ismael Fortes Freitas
,
Gomes, Igor Conterato
in
Actividad Motora
,
Anciano
,
Atividade Física
2015
Objective: To analyze the association of regular physical activity and
nutritional status with chronic noncommunicable diseases (NCDs) in
elderly women. Methods: Observational and analytical cross-sectional
study conducted with a convenience sample of 367 elderly women (60 and
over) from the cities of Presidente Prudente, SP and Uberaba, MG,
between October/2010 and August/2012. NCDs were identified using a
questionnaire based on the Standard Health Questionnaire (SHQ). The
International Physical Activity Questionnaire (IPAQ) was used to assess
the level of physical activity and anthropometric variables were used
to assess the nutritional status. Statistical analysis included the
chi-squared test to check for association between physical activity
level, according to nutritional status, and the presence of
cardiometabolic diseases, and binary logistic regression to test the
magnitude of these associations. Results: There was a protective factor
against hypertension in active eutrophic women (p=0.024) and sedentary
eutrophic women (p=0.032) when compared to the risk group (sedentary
and overweight/obesity women); however, this was not observed in
physically active overweight women (p=0.734). There was a positive
association between sedentary eutrophic elderly women (p=0.047) and the
risk for cholesterol. None of the groups were associated with diabetes.
Conclusion:Physical activity was not considered a protective factor for
hypercholesterolemia, diabetes and hypertension, possibly because of
reverse causality given that sedentary women started physical activity
after the diagnosis of the disease, which contributed to these results.
Objetivo: Analisar a relação da prática de atividade
física e do estado nutricional com as doenças crônicas
não transmissíveis (DCNT) em mulheres idosas. Métodos:
Estudo observacional, analítico, transversal, amostra por
conveniência, amostra de 367 mulheres idosas (60 anos ou mais) das
cidades de Presidente Prudente-SP e Uberaba-MG, entre outubro/2010 e
agosto/2012. Para identificação das DCNT, utilizou-se um
questionário baseado no Standard Health Questionnaire (SHQ), o
Questionário Internacional de Atividade Física (IPAQ), para
avaliar o nível de atividade física e as variáveis
antropométricas para o estado nutricional. Na análise
estatística, utilizou-se o teste qui-quadrado para verificar a
associação entre o nível de atividade física,
segundo estado nutricional e presença de doenças
cardiometabólicas, e regressão logística binária
para testar a magnitude dessas associações. Resultados: Houve
fator de proteção contra a hipertensão para as mulheres
consideradas eutróficas ativas (p=0,024) e eutróficas
sedentárias (p=0,032) quando comparadas ao grupo de risco
(sedentárias e com sobrepeso/obesidade), porém o mesmo
não foi observado nas com excesso de peso e consideradas ativas
fisicamente (p=0,734). Houve associação positiva entre as
idosas eutróficas sedentárias (p=0,047) em relação
ao risco para colesterol. Quando observado, o diabetes não obteve
associação em nenhum dos grupos. Conclusão: A atividade
física não foi considerada como fator de proteção
para hipercolesterolemia, diabetes e hipertensão, possivelmente
por causa da causalidade reversa, pois, a partir do diagnóstico da
doença, essas mulheres, antes sedentárias, iniciaram a
prática de atividade física, contribuindo para esses
resultados.
Objetivo: Analizar la relación de la práctica de actividad
física y el estado nutricional con las enfermedades crónicas
no transmisibles (ECNT) en mujeres mayores. Métodos:Estudio
observacional, analítico, transversal de muestreo por conveniencia
y muestra de 367 mujeres mayores (60 años o más) de las
ciudades de Presidente Prudente-SP y Uberaba-MG, entre octubre/2010 y
agosto/2012. Se utilizó un cuestionario basado en el Standard
Health Questionnaire (SHQ) para la identificación de las ECNT, el
Cuestionario Internacional de Actividad Física (IPAQ) para evaluar
el nivel de actividad física y las variables antropométricas
para evaluar el estado nutricional. En el análisis
estadístico se utilizó la prueba de Chi-cuadrado para
verificar la asociación del nivel de actividad física
según el estado nutricional y la presencia de enfermedades
cardiometabolicas y la regresión logística binaria para
testar la magnitud de estas asociaciones. Resultados: Se encontró
un factor de protección contra la hipertensión para las
mujeres consideradas eutróficas activas (p=0,024) y
eutróficas sedentarias (p=0,032) al comparar con el grupo de
riesgo (sedentarias y con sobrepeso/obesidad), sin embargo lo mismo no
se ha observado en aquellas con exceso de peso consideradas
físicamente activas (p=0,734). Hubo asociación positiva entre
las mujeres mayores eutróficas sedentarias (p=0,047) y el riesgo
de colesterol. No hubo asociación de la diabetes en ningún de
los grupos. Conclusión: La actividad física no ha sido
considerada como factor de protección para la hipercolesterolemia,
la diabetes y la hipertensión, posiblemente debido la causalidad
reversa, pues a partir del diagnóstico de la enfermedad estas
mujeres, que antes eran sedentarias, empezaron la práctica de
actividad física, contribuyendo con estos resultados.
Journal Article
Physical activity and nutritional status influence in the rise of chronic noncommunicable diseases in old women?
by
Ismael Fortes Freitas Júnior
,
Thais Reis Silva Paulo
,
Diego Giulliano Destro Christofaro
in
Anthropometry
,
Cholesterol
,
Diabetes
2014
Objective: To analyze the association of regular physical activity and nutritional status with chronic noncommunicable diseases (NCDs) in elderly women. Methods: Observational and analytical cross-sectional study conducted with a convenience sample of 367 elderly women (60 and over) from the cities of Presidente Prudente, SP and Uberaba, MG, between October/2010 and August/2012. NCDs were identified using a questionnaire based on the Standard Health Questionnaire (SHQ). The International Physical Activity Questionnaire (IPAQ) was used to assess the level of physical activity and anthropometric variables were used to assess the nutritional status. Statistical analysis included the chi-squared test to check for association between physical activity level, according to nutritional status, and the presence of cardiometabolic diseases, and binary logistic regression to test the magnitude of these associations. Results: There was a protective factor against hypertension in active eutrophic women (p=0.024) and sedentary eutrophic women (p=0.032) when compared to the risk group (sedentary and overweight/obesity women); however, this was not observed in physically active overweight women (p=0.734). There was a positive association between sedentary eutrophic elderly women (p=0.047) and the risk for cholesterol. None of the groups were associated with diabetes. Conclusion: Physical activity was not considered a protective factor for hypercholesterolemia, diabetes and hypertension, possibly because of reverse causality given that sedentary women started physical activity after the diagnosis of the disease, which contributed to these results.
Journal Article
Comparative analysis of local angular rotation between the Ring Laser Gyroscope GINGERINO and GNSS stations
2023
The study of local deformations is a hot topic in geodesy. Local rotations of the crust around the vertical axis can be caused by deformations. In the Gran Sasso area the ring laser gyroscope GINGERINO and the GNSS array are operative. One year of data of GINGERINO is compared with the ones from the GNSS stations, homogeneously selected around the position of GINGERINO, aiming at looking for rotational signals with period of days common to both systems. At that purpose the rotational component of the area circumscribed by the GNSS stations has been evaluated and compared with the GINGERINO data. The coherences between the signals show structures that even exceed 60\\(\\%\\) coherence over the 6-60 days period; this unprecedented analysis is validated by two different methods that evaluate the local rotation using the GNSS stations. The analysis reveals that the shared rotational signal's amplitude in both instruments is approximately \\(10^{-13} rad/s\\), an order of magnitude lower than the amplitudes of the signals examined using the coherence method. The comparison of the ring laser data with GNSS antennas provides evidence of the validity of the ring laser data for very low frequency investigation, essential for fundamental physics test.