A beam–beam monitoring detector for the MPD experiment at NICA Alvarado, Mauricio; Ayala, Alejandro; Ayala-Torres, Marco Alberto ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
02/2020, Letnik:
953
Journal Article
Recenzirano
Odprti dostop
The Multi-Purpose Detector (MPD) is to be installed at the Nuclotron Ion Collider fAcility (NICA) of the Joint Institute for Nuclear Research (JINR). Its main goal is to study the phase diagram of ...the strongly interacting matter produced in heavy-ion collisions. These studies, while providing insight into the physics of heavy-ion collisions, are relevant for improving our understanding of the evolution of the early Universe and the formation of neutron stars. In order to extend the MPD trigger capabilities, we propose to include a high granularity beam–beam monitoring detector (BE–BE) to provide a level-0 trigger signal with an expected time resolution of 30 ps. This new detector will improve the determination of the reaction plane by the MPD experiment, a key measurement for flow studies that provides physics insight into the early stages of the reaction.
In this work, we use simulated Au+Au collisions at NICA energies to show the potential of such a detector to determine the event plane resolution, providing further redundancy to the detectors originally considered for this purpose namely, the Fast Forward Detector (FFD) and the Hadron Calorimeter (HCAL). We also show our results for the time resolution studies of two prototype cells carried out at the T10 beam line at the CERN PS complex.
The NA61/SHINE experiment at the CERN Super Proton Synchrotron studies the onset of deconfinement in strongly interacting matter through a beam energy scan of particle production in collisions of ...nuclei of varied sizes. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions and mean multiplicities of
π
±
,
K
±
,
p
and
p
¯
produced in
40
Ar+
45
Sc
collisions at beam momenta of 13
A
, 19
A
, 30
A
, 40
A
, 75
A
and 150
A
Ge
V
/
c
. The analysis uses the 10% most central collisions, where the observed forward energy defines centrality. The energy dependence of the
K
±
/
π
±
ratios as well as of inverse slope parameters of the
K
±
transverse mass distributions are placed in between those found in inelastic
p
+
p
and central Pb + Pb collisions. The results obtained here establish a system-size dependence of hadron production properties that so far cannot be explained either within statistical or dynamical models.
Recent calls to action have been made for Implementation Science to attend to health inequities at the intersections of race, gender, and social injustice in the United States. Transgender people, ...particularly Black and Latina transgender women, experience a range of health inequities and social injustices. In this study, we compared two processes of transgender community engagement in Los Angeles and in Chicago as an implementation strategy to address inequitable access to care; we adapted and extended the Exploration Planning Implementation and Sustainment (EPIS) framework for transgender health equity. A comparative case method and the EPIS framework were used to examine parallel implementation strategies of transgender community engagement to expand access to care. To foster conceptual development and adaptation of EPIS for trans health equity, the comparative case method required detailed description, exploration, and analyses of the community-engagement processes that led to different interventions to expand access. In both cities, the unit of analysis was a steering committee made up of local transgender and cisgender stakeholders. Both steering committees initiated their exploration processes with World Café-style, transgender community-engaged events in order to assess community needs and structural barriers to healthcare. The steering committees curated activities that amplified the voices of transgender community members among stakeholders, encouraging more effective and collaborative ways to advance transgender health equity. Based on analysis and findings from the Los Angeles town hall, the steering committee worked with a local medical school, extending the transgender medicine curriculum, and incorporating elements of transgender community-engagement. The Chicago steering committee determined from their findings that the most impactful intervention on structural racism and barriers to healthcare access would be to design and pilot an employment program for Black and Latina transgender women. In Los Angeles and Chicago, transgender community engagement guided implementation processes and led to critical insights regarding specific, local barriers to healthcare. The steering committee itself represented an important vehicle for individual-, organizational-, and community-level relationship and capacity building. This comparative case study highlights key adaptations of EPIS toward the formation of an implementation science framework for transgender health equity.
Imprints of clustering in multiplicity fluctuations Bazgir, A.; Reyna Ortiz, V. Z.; Rybczynski, M. ...
The European physical journal. A, Hadrons and nuclei,
03/2023, Letnik:
59, Številka:
3
Journal Article
Recenzirano
Odprti dostop
In this paper, we investigate the multiplicity fluctuations of charged particles observed in high-energy nuclear collisions and relate them to the size of hadronizing systems which happen during such ...processes. We use the average multiplicities
⟨
N
⟩
and variances
V
a
r
N
of multiplicity distributions of charged particles produced in centrality selected collisions of relativistic heavy-ion nuclei to evaluate the dynamic variance
Ω
and study its dependence on the size of colliding systems. We connect the observed system-size dependence of multiplicity fluctuations with the clustering phenomena and the finiteness of the hadronizing sources and the thermal bath.
The critical point of dense, strongly interacting matter is searched for at the CERN SPS in
40
Ar +
45
Sc collisions at 150
A
Ge V /
c
. The dependence of second-order scaled factorial moments of ...proton multiplicity distribution on the number of subdivisions of transverse momentum space is measured. The intermittency analysis is performed using both transverse momentum and cumulative transverse momentum. For the first time, statistically independent data sets are used for each subdivision number. The obtained results do not indicate any statistically significant intermittency pattern. An upper limit on the fraction of correlated proton pairs and the power of the correlation function is obtained based on a comparison with the Power-law Model developed for this purpose.
The mechanical ventilator support (MVS) it is a procedure which improves survival of critically ill newborns (NB), but is not risk free one of them is tracheal damage reintubations by extubation ...failure. Knowledge that there is the medical literature is about preterm infant and there is not information about term NB.
To establish that factors are associated to the unsuccessful extubation in the term NB from 37 to 42 weeks of gestational age.
Retrospective study, of case-control in cohort including all the files and/or patient term NB that were interned in the Neonatal Intensive Care Unit of a Neonatology Service during the period of January from the 2004 to December of 2008 that they fulfilled the selection criteria. They were formed two groups: group A of cases (extubation failure) and group B of controls (successful extubation). Extubation failure was considered when there was need for the patient reintubate during first 72 hrs. We take into account to patient of term NB of one to 28 days of extrauterine life that remained with MVS at least 24 hrs and that to extubate was achieved with or without success, previous step for tracheal continuous positive airway pressure (CPAP), and that they were not more than 28 days with MVS. The statistical analysis was carried out by means of the descriptive and the inferential statistic. It was considered area of significance with p < 0.05.
Fourty one patients were included divided in two groups: group A (cases) of 17 patients, and group B (controls) with 24 patients. The population's characteristics studied among the two groups didn't show significant differences. Of the variables studied between the two groups showed significant differences of age at start of ventilation, calories and the hemoglobin for controls and the time spent with MVS, reintubations number, and the peak inspiratory pressure (PIP) prior to the passage of the CPAP for cases, all with p < 0.05. In the multivariate analysis they were significant association as factor of risk for the extubation failure when the PIP was > 18 cm H2O, cycles > 15x' and hemoglobin < 13 g/dL.
Based on the above we conclude that in the term NB with MVS before placing in tracheal CPAP for the extubation should have a PIP < or = 18 cm H2O, cycles < or = 15x' and a hemoglobin not smaller than 13 g/dL to avoid this way as much as possible the extubation failure and with it to improve the prognosis.
The primary aim is to assess the implementation of an eight-session, group therapy pilot for Black and Latina transgender women in Chicago in terms of implementation outcomes regarding intervention ...effectiveness, acceptability, appropriateness, and feasibility. The Exploration Preparation Implementation Sustainment (EPIS) framework guided implementation processes, including community engagement as an implementation strategy, and an implementation taxonomy was used to evaluate outcomes of acceptability, appropriateness, and feasibility, in addition to intervention effectiveness regarding anxiety and community connectedness. Two rounds of the pilot were completed in 2020, during the COVID-19 pandemic, at a community-based organization serving LGBTQ+ (lesbian, gay, bisexual, transgender, queer/questioning) youth on Chicago’s West Side. Participants (N = 14) completed a baseline and postintervention assessment and evaluations after each of eight intervention modules. Descriptive statistics show improvement across measures of anxiety and community connectedness, and high mean scores across domains of acceptability, appropriateness, and feasibility. Pilot findings indicate intervention effectiveness, acceptability, appropriateness, and feasibility to address mental health and social support of Black and Latina transgender women. Additional resources are needed for transgender community-engaged mental health programs and research to establish core and adaptable intervention elements, scaled-up evidence for clinical effectiveness, and, most importantly, to improve mental health outcomes and the sustainability of such interventions.
It has been demonstrated that intermittency, a self-similar correlation regarding the size of the phase space volume, exhibits sensitivity to particle bunching within a system situated in the ...two-dimensional cell. Based on recent findings concerning fluctuations in charge particle density observed in central Au + Au collisions at various energies ranging from \(\sqrt{s_{NN}}\) = 7.7 to 200 GeV at RHIC/STAR, it is proposed that analyzing intermittency in relativistic heavy-ion collisions could serve as a method to investigate density fluctuations linked to correlation phenomena. Our understanding of particle production mechanisms may be enriched by using intermittency analysis to gain new information contained in them that was previously unavailable.
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