Probing the hadronic phase with resonances of different lifetimes in Pb-Pb collisions with ALICE

The ALICE experiment has measured the production of a rich set of hadronic resonances, such as $\rho(770)^{0}$, ${\rm K}^{\ast}(892)^{0}$, $\phi$(1020), $\Sigma^{\pm}$(1385), $\Lambda(1520)$ and $\Xi^{\ast 0}$ in pp, p-Pb and Pb-Pb collisions at various energies at the LHC. A comprehensive overview and the latest results are presented in this paper. Special focus is given to the role of hadronic resonances for the study of final-state effects in high-energy collisions. In particular, the measurement of resonance production in heavy-ion collisions has the capability to provide insight into the existence of a prolonged hadronic phase after hadronisation. The observation of the suppression of the production of $\Lambda(1520)$ resonance in central Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV adds further support to the existence of such a dense hadronic phase, as already evidenced by the ratios ${\rm K}^{\ast}(892)^{0}$/${\rm K}$ and $\rho(770)^{0}$/$\pi$.Comment: 4 pages, 3 figures, 17th International Conference on Strangeness in Quark Matter (SQM 2017

Object-Proposal Evaluation Protocol is 'Gameable'

Object proposals have quickly become the de-facto pre-processing step in a number of vision pipelines (for object detection, object discovery, and other tasks). Their performance is usually evaluated on partially annotated datasets. In this paper, we argue that the choice of using a partially annotated dataset for evaluation of object proposals is problematic -- as we demonstrate via a thought experiment, the evaluation protocol is 'gameable', in the sense that progress under this protocol does not necessarily correspond to a "better" category independent object proposal algorithm. To alleviate this problem, we: (1) Introduce a nearly-fully annotated version of PASCAL VOC dataset, which serves as a test-bed to check if object proposal techniques are overfitting to a particular list of categories. (2) Perform an exhaustive evaluation of object proposal methods on our introduced nearly-fully annotated PASCAL dataset and perform cross-dataset generalization experiments; and (3) Introduce a diagnostic experiment to detect the bias capacity in an object proposal algorithm. This tool circumvents the need to collect a densely annotated dataset, which can be expensive and cumbersome to collect. Finally, we plan to release an easy-to-use toolbox which combines various publicly available implementations of object proposal algorithms which standardizes the proposal generation and evaluation so that new methods can be added and evaluated on different datasets. We hope that the results presented in the paper will motivate the community to test the category independence of various object proposal methods by carefully choosing the evaluation protocol.Comment: 15 pages, 11 figures, 4 table

Probing the hadronic phase of large hadronizing system through the study of the Λ(1520) resonance with ALICE at the LHC*

The measurement of hadronic resonance production in heavy-ion col- lisions at the LHC has led to observing a prolonged hadronic phase after hadronization. Due to their short lifetimes, resonances experience the competing effects of re-generation and rescattering of their decay products in the hadronic medium. Studying how these processes affect the experimentally measured yields can extend the current understanding of the properties of the hadronic phase and the mechanisms that determine the shape of particle pT spectra. This contribution presents new preliminary results on the production of Λ(1520) resonance measured in Pb-Pb col- lisions at √ sNN = 5.02 TeV with the ALICE detector at the LHC. These results on Λ(1520) (lifetime, τ = 12.6 fm/c) are compared with a set of hadronic reso- nances with a lifetime span of 1 to 46 fm/c such as ρ(770)0, K∗(892)0, Σ(1385)±, Ξ(1530)0 and φ(1020) measured by the ALICE experiment. The shape of particle transverse momentum (pT), mean pT and particle ratios are compared with those predicted from the Blast-Wave, MUSIC with SMASH afterburner and statistical hadronization model predictions

Identification of factors determining the initiation of breastfeeding in postnatal women in a tertiary care centre: an observational study

Background: The WHO recommends that mothers worldwide to initiate breastfeeding within an hour of delivery to achieve optimal growth, development and health but the breastfeeding rates remain far below the recommended standards. The aim of this study was to find the prevalence of delay in initiation of breast feeding, to identify various factors which determine the initiation of breastfeeding and to correlate their association with delayed onset of breast feeding.Methods: Hundred and thirty six postnatal women, who delivered in Santosh Medical College and Hospital, Ghaziabad, were recruited in the study. They were interviewed after their informed consent using a pretested structured questionnaire. Socio-demographic and obstetric factors were compared between subjects who initiated breast feeding in less than and more than 1 hours. Frequencies were calculated for different variables. Data was statistically analyzed and p value of <0.05 was taken significant.Results: The prevalence of delay in initiation of breast feeding in our study was found to be 74.2% (n=101).The mean time of initiation of breast feeding was 18.43 hours. Significant association (p <0.05) was found in various sociodemographic, obstetrical and social factors.Conclusions: Identifying mothers at risk of delayed breastfeeding initiation should be the target for breastfeeding promotion during prenatal, antenatal as well as postnatal period. Public health officials and health care providers should consider interventions to promote and support early initiation of breast feeding

Role of cytology, colposcopy and colposcopic directed biopsy in the evaluation of unhealthy cervix

Background: The objective was to find out the magnitude of precancerous lesions and evaluate the performance of colposcopy in estimating the presence and grade of cervical disease vs conventional Pap smear testing of women with unhealthy cervix.Methods: This was a prospective observational study. All the women were subjected to Pap smear and colposcopy, whereas histopathology was done in patients having abnormal findings on colposcopy. Biopsies were taken from the abnormal areas.Results: Out of 110 women who completed the study 60 (54.5%) had changes in their cervical epithelium on colposcopy. These 60 women with unhealthy cervix underwent cervical biopsy, and 20 (33.3%) had histologically proven chronic cervicitis, 6 (10%) had chronic cervicitis with condylomatous change followed by 17 (28.3%) with CIN 1 lesion, 8 (13.3%) with CIN 2, 4 (6.7%) with CIN 3 lesion and only one (1.7%) had histologically proven malignancy. Cytology alone identified the population at risk with a high sensitivity [70.00% (95% CI: 50.60 % to 85.24 %)] but low specificity [60.00% (95% CI: 40.61 % to 77.32 %)] rate. Colposcopy showed a high sensitivity rate [93.33 % (95% CI: 77.19 % to 98.99 %)] but a limited specificity [70.00% (95% CI: 50.60% to 85.24%)].Conclusions: It is very important to diagnose the CIN lesions with accuracy once a woman comes to a tertiary care hospital with symptoms or is referred for a suspicious looking cervix. All these women must be screened by colposcopy and directed biopsy must be taken if indicated in the same sitting

Comparative evaluation of colposcopy, cytology and histopathology for diagnosis of cervical lesions

Background: Cervical cancer is the fourth most frequent cancer globally in women with an estimated 570,000 new cases and 311,000 deaths in 2018 representing 6.6% of all female cancers. To correlate the cytology, colposcopy and histopathology of cervical lesions in patients attending gynaecology OPD in a tertiary care centre, Ghaziabad.Methods: 208 women were enrolled from Gynaecology OPD of Santosh Medical College and Hospital, Ghaziabad, irrespective of their chief complaints. Women aged 19-80 years were included in the study group. Those with pregnancy and already diagnosed or treated with CIN, Cervical cancer or Cervical HPV infection were excluded from the study. PAP-smear was taken for all the patients followed by colposcopy without waiting for PAP-smear report. Cervical biopsy was taken from patients with abnormal colposcopic findings (90 patients).Results: Majority of women were in age group 30-39 years. 37.5% had unhealthy, 21.6% had hypertrophied cervix and only 9.1% had normal cervix. It was found that PAP -smear has a sensitivity of 33.33%, specificity of 92.59%, accuracy of 68.89%, positive predictive value of 75% and negative predictive value of 67.57%. Test parameters calculated for colposcopy revealed that it has sensitivity of 73.33%, specificity of 92%, PPV of 64.7%, NPV of 94.52% and accuracy of 88.89%.Conclusions: The results from the current study conclude that it is better to use cytology and colposcopy together as part of routine screening for cervical cancer rather than pap smear alone in order to detect maximum number of lesions

Spin alignment measurements using vector mesons with ALICE detector at the LHC

We present new measurements related to spin alignment of K*0 vector mesons at mid-rapidity for Pb–Pb collisions at √sNN = 2.76 and 5.02 TeV. The spin alignment measurements are carried out with respect to production plane and 2nd order event plane. At low pT the spin density matrix element ρ00 for K*0 is found to have values slightly below 1/3, while it is consistent with 1/3, i.e. no spin alignment, at high pT. Similar values of ρ00 are observed with respect to both production plane and event plane. Within statistical and systematic uncertainties, ρ00 values are also found to be independent of √sNN. ρ00 also shows centrality dependence with maximum deviation from 1/3 for mid-central collisions with respect to both the kinematic planes. The measurements for K*0 in pp collisions at √s = 13 TeV and for K0S (a spin 0 hadron) in 20-40% central Pb–Pb collisions at √sNN = 2.76 TeV are consistent with no spin alignment.publishedVersio

Mid-Staffordshire:a case study of failed governance and leadership?

Hadronic resonances are unique tools to investigate the interplay of re-scattering and regeneration effects during the hadronization phase in heavy-ion collisions. Measurements in small collision systems provide a necessary baseline for heavy-ion data, help to tune pQCD inspired event generators and give insight into the search for the onset of collective effects. As the ϕ meson has a longer lifetime compared to other resonances, it is expected that its production would be much less affected by regeneration and re-scattering processes. We report on measurements of ϕ meson production in minimum bias pp collisions at different beam energies and as a function of charged particle multiplicity with the ALICE detector at the LHC. The results include the transverse momentum (pT) distributions of ϕ as well as the particle yield ratios. Finally, we have also studied the ϕ effective strangeness content by comparing our results to theoretical calculations

Global, regional, and national cancer incidence, mortality, years of life lost, years lived with disability, and disability-Adjusted life-years for 29 cancer groups, 1990 to 2017 : A systematic analysis for the global burden of disease study

Importance: Cancer and other noncommunicable diseases (NCDs) are now widely recognized as a threat to global development. The latest United Nations high-level meeting on NCDs reaffirmed this observation and also highlighted the slow progress in meeting the 2011 Political Declaration on the Prevention and Control of Noncommunicable Diseases and the third Sustainable Development Goal. Lack of situational analyses, priority setting, and budgeting have been identified as major obstacles in achieving these goals. All of these have in common that they require information on the local cancer epidemiology. The Global Burden of Disease (GBD) study is uniquely poised to provide these crucial data. Objective: To describe cancer burden for 29 cancer groups in 195 countries from 1990 through 2017 to provide data needed for cancer control planning. Evidence Review: We used the GBD study estimation methods to describe cancer incidence, mortality, years lived with disability, years of life lost, and disability-Adjusted life-years (DALYs). Results are presented at the national level as well as by Socio-demographic Index (SDI), a composite indicator of income, educational attainment, and total fertility rate. We also analyzed the influence of the epidemiological vs the demographic transition on cancer incidence. Findings: In 2017, there were 24.5 million incident cancer cases worldwide (16.8 million without nonmelanoma skin cancer [NMSC]) and 9.6 million cancer deaths. The majority of cancer DALYs came from years of life lost (97%), and only 3% came from years lived with disability. The odds of developing cancer were the lowest in the low SDI quintile (1 in 7) and the highest in the high SDI quintile (1 in 2) for both sexes. In 2017, the most common incident cancers in men were NMSC (4.3 million incident cases); tracheal, bronchus, and lung (TBL) cancer (1.5 million incident cases); and prostate cancer (1.3 million incident cases). The most common causes of cancer deaths and DALYs for men were TBL cancer (1.3 million deaths and 28.4 million DALYs), liver cancer (572000 deaths and 15.2 million DALYs), and stomach cancer (542000 deaths and 12.2 million DALYs). For women in 2017, the most common incident cancers were NMSC (3.3 million incident cases), breast cancer (1.9 million incident cases), and colorectal cancer (819000 incident cases). The leading causes of cancer deaths and DALYs for women were breast cancer (601000 deaths and 17.4 million DALYs), TBL cancer (596000 deaths and 12.6 million DALYs), and colorectal cancer (414000 deaths and 8.3 million DALYs). Conclusions and Relevance: The national epidemiological profiles of cancer burden in the GBD study show large heterogeneities, which are a reflection of different exposures to risk factors, economic settings, lifestyles, and access to care and screening. The GBD study can be used by policy makers and other stakeholders to develop and improve national and local cancer control in order to achieve the global targets and improve equity in cancer care. © 2019 American Medical Association. All rights reserved.Peer reviewe

Azimuthal anisotropy of charged jet production in root s(NN)=2.76 TeV Pb-Pb collisions

We present measurements of the azimuthal dependence of charged jet production in central and semi-central root s(NN) = 2.76 TeV Pb-Pb collisions with respect to the second harmonic event plane, quantified as nu(ch)(2) (jet). Jet finding is performed employing the anti-k(T) algorithm with a resolution parameter R = 0.2 using charged tracks from the ALICE tracking system. The contribution of the azimuthal anisotropy of the underlying event is taken into account event-by-event. The remaining (statistical) region-to-region fluctuations are removed on an ensemble basis by unfolding the jet spectra for different event plane orientations independently. Significant non-zero nu(ch)(2) (jet) is observed in semi-central collisions (30-50% centrality) for 20 <p(T)(ch) (jet) <90 GeV/c. The azimuthal dependence of the charged jet production is similar to the dependence observed for jets comprising both charged and neutral fragments, and compatible with measurements of the nu(2) of single charged particles at high p(T). Good agreement between the data and predictions from JEWEL, an event generator simulating parton shower evolution in the presence of a dense QCD medium, is found in semi-central collisions. (C) 2015 CERN for the benefit of the ALICE Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).Peer reviewe