Crowding perception: A case study of developed systematic literature review procedure with multiple software programs as management and synthesis tools

The aim of this paper is to presents a case study that implements a proposed procedure for conducting a systematic literature review (SLR). The case study is in the field of crowding perception. Following the traditional data processing model, the proposed procedure consists of seven stages: 1) planning the review, 2) conducting the review, 3), organization and preparation for synthesis, 4) actual coding, 5) data extraction & organization, 6) data synthesis, and 7) reporting the review. In addition, the proposed procedure includes the usage of four software programs as supporting tools. The paper includes detailed steps on how each stage has been implemented to systemati-cally review the crowding perception literature. The proposed SLR procedure and the case study presented in this paper offer an effective process of literature review. A specific contribution of this study to SLR is expanding the tools usage to include other software programs

Structural equation modelling assessment of personal and social factors on Hajj crowding among African pilgrims in Mina

African pilgrimage to the Mecca date back to the early years of Islam through the Sahara desert. The perception of this group of pilgrims as they embark on the sacred Mina prayer rituals directly translates to how they perceived crowding in Mina. Hajj rituals are carried out at Mina for a minimum of three days. The optimum provision and continuous improvements of the facilities for pilgrims determines how this group reacts to the crowded environment which invariably affects their psychology. This paper assesses the impacts of personal fac-tors (control, expectation, mood and sociability) and social factors (interpersonal similarity, provision of information and activities) on crowding levels perception among pilgrim groups from African origins. A self-administered survey instrument was used in the collection of data from the African origin Hajj group totaling 156 in number. Data analysis was carried out utilizing SPSS on the descriptive data and AMOS for multivariate Structural Equation Modeling (SEM). The survey instruments internal consistency, sample adequacy Kaiser-Meyer-Olkin measure and exploratory factor analysis (EFA) found that the validity was within acceptable thresholds. The pilgrim groups from African origins measurement model revealed that sociability and interpersonal similarity had the highest correlation while level of perceived crowing and activities had the lowest correlation. Furthermore, for personal factors, sociability had the highest inverse impact and for social factors, interpersonal similarity. The authorities formulating policies to managing crowd levels and perception will invari-ably be affected by adapting these research findings to improve the Hajj experience. Subsequently, assessing several other factors, which effect Hajj pilgrims such as physical factors, provides an avenue for future research

Assessing the effects of crowding perception and gender among Southeast Asia pilgrims in Mina, Saudi Arabia

This study gives a better understanding of the effect of crowding on pilgrims at the Hajj. It explores the levels of perceived crowding of Southeastern Asian pilgrims and investigates the effects of gender on their perceived crowding. Questionnaire in both Bahasa Melayu and English languages were administered for data collections from randomly selected pilgrims, (n=128), from the Southeast Asia Hajj group at Mina for three days (10th, 11th and 12th of Dhul-Hijjah). Results revealed that pilgrims witness high levels of crowd perception within their stay at Mina. In addition also, differences between the overall perceived crowding, perceived human crowding and perceived spatial crowding among pilgrims were revealed. Perceived human crowding was found as an indicator to the overall perceived crowding at Mina. Future research could be carried out to assess the effects of other factors such as education and cultural backgrounds and these findings can help authorities in charge of formulating policies manage crowd levels and perception

Whole-genome sequencing of chronic lymphocytic leukemia identifies subgroups with distinct biological and clinical features.

The value of genome-wide over targeted driver analyses for predicting clinical outcomes of cancer patients is debated. Here, we report the whole-genome sequencing of 485 chronic lymphocytic leukemia patients enrolled in clinical trials as part of the United Kingdom's 100,000 Genomes Project. We identify an extended catalog of recurrent coding and noncoding genetic mutations that represents a source for future studies and provide the most complete high-resolution map of structural variants, copy number changes and global genome features including telomere length, mutational signatures and genomic complexity. We demonstrate the relationship of these features with clinical outcome and show that integration of 186 distinct recurrent genomic alterations defines five genomic subgroups that associate with response to therapy, refining conventional outcome prediction. While requiring independent validation, our findings highlight the potential of whole-genome sequencing to inform future risk stratification in chronic lymphocytic leukemia

Search for a new pseudoscalar decaying into a pair of bottom and antibottom quarks in top-associated production in s=13\sqrt{s}=13 TeV proton–proton collisions with the ATLAS detector

Abstract A search for a pseudoscalar a produced in association with a top-quark pair, or in association with a single top quark plus a W boson, with the pseudoscalar decaying into b -quarks ( $$a\rightarrow b\bar{b}$$ a → b b ¯ ), is performed using the full Run 2 data sample using a dileptonic decay mode signature. The search covers pseudoscalar boson masses between 12 and 100 GeV and involves both the kinematic regime where the decay products of the pseudoscalar are reconstructed as two standard b -tagged small-radius jets, or merged into a large-radius jet due to its Lorentz boost. No significant excess relative to expectations is observed. Assuming a branching ratio $$\text {BR}(a\rightarrow b\bar{b})=100\%$$ BR ( a → b b ¯ ) = 100 % , the range of pseudoscalar masses between 50 and 80 GeV is excluded at 95% confidence level for a coupling of the pseudoscalar to the top quark of 0.5, while a coupling of 1.0 is excluded at 95% confidence level for the masses considered, with the coupling defined as the strength modifier of the Standard Model Yukawa coupling

Differential cross-section measurements of Higgs boson production in the H → τ+τ− decay channel in pp collisions at s = 13 TeV with the ATLAS detector

Abstract : Differential measurements of Higgs boson production in the τ-lepton-pair decay channel are presented in the gluon fusion, vector-boson fusion (VBF), VH and $$t\overline{t}H$$ t t ¯ H associated production modes, with particular focus on the VBF production mode. The data used to perform the measurements correspond to 140 fb −1 of proton-proton collisions collected by the ATLAS experiment at the LHC. Two methods are used to perform the measurements: the Simplified Template Cross-Section (STXS) approach and an Unfolded Fiducial Differential measurement considering only the VBF phase space. For the STXS measurement, events are categorized by their production mode and kinematic properties such as the Higgs boson’s transverse momentum ( $${p}_{\textrm{T}}^{\textrm{H}}$$ p T H ), the number of jets produced in association with the Higgs boson, or the invariant mass of the two leading jets (m jj ). For the VBF production mode, the ratio of the measured cross-section to the Standard Model prediction for m jj > 1.5 TeV and $${p}_{\textrm{T}}^{\textrm{H}}$$ p T H > 200 GeV ( $${p}_{\textrm{T}}^{\textrm{H}}$$ p T H < 200 GeV) is $${1.29}_{-0.34}^{+0.39}$$ 1.29 − 0.34 + 0.39 ( $${0.12}_{-0.33}^{+0.34}$$ 0.12 − 0.33 + 0.34 ). This is the first VBF measurement for the higher- $${p}_{\textrm{T}}^{\textrm{H}}$$ p T H criteria, and the most precise for the lower- $${p}_{\textrm{T}}^{\textrm{H}}$$ p T H criteria. The fiducial cross-section measurements, which only consider the kinematic properties of the event, are performed as functions of variables characterizing the VBF topology, such as the signed ∆ϕ jj between the two leading jets. The measurements have a precision of 30%–50% and agree well with the Standard Model predictions. These results are interpreted in the SMEFT framework, and place the strongest constraints to date on the CP-odd Wilson coefficient $${c}_{H\overset{\sim }{W}}$$ c H W ~

A precise measurement of the jet energy scale derived from single-particle measurements and in situ techniques in proton–proton collisions at s=\sqrt{s}= 13 TeV with the ATLAS detector

Abstract The jet energy calibration and its uncertainties are derived from measurements of the calorimeter response to single particles in both data and Monte Carlo simulation using proton–proton collisions at $$\sqrt{s} = 13$$ s = 13 TeV collected with the ATLAS detector during Run 2 at the Large Hadron Collider. The jet calibration uncertainty for anti- $$k_T$$ k T jets with a jet radius parameter of R $$_\textrm{jet} = 0.4$$ jet = 0.4 and in the central jet rapidity region is about 2.5% for transverse momenta ( $$p_{\text {T}}$$ p T ) of 20 $$\text {GeV}$$ GeV , about $$0.5\%$$ 0.5 % for $$p_{\text {T}} =300$$ p T = 300 $$\text {GeV}$$ GeV and $$0.7\%$$ 0.7 % for $$p_{\text {T}} =4$$ p T = 4 $$\text {TeV}$$ TeV . Excellent agreement is found with earlier determinations obtained from $$p_\textrm{T}$$ p T -balance based in situ methods ( $$Z/\gamma$$ Z / γ +jets). The combination of these two independent methods results in the most precise jet energy measurement achieved so far with the ATLAS detector with a relative uncertainty of $$0.3\%$$ 0.3 % at $$p_\textrm{T}=300$$ p T = 300 GeV and $$0.6\%$$ 0.6 % at 4 TeV. The jet energy calibration is also derived with the single-particle calorimeter response measurements separately for quark- and gluon-induced jets and furthermore for jets with R $$_\textrm{jet}$$ jet varying from 0.2 to 1.0 retaining the correlations between these measurements. Differences between inclusive jets and jets from boosted top-quark decays, with and without grooming the soft jet constituents, are also studied

Search for the associated production of charm quarks and a Higgs boson decaying into a photon pair with the ATLAS detector

Abstract : A search for the production of a Higgs boson and one or more charm quarks, in which the Higgs boson decays into a photon pair, is presented. This search uses proton-proton collision data with a centre-of-mass energy of $$\sqrt{s}$$ s = 13 TeV and an integrated luminosity of 140 fb −1 recorded by the ATLAS detector at the Large Hadron Collider. The analysis relies on the identification of charm-quark-containing jets, and adopts an approach based on Gaussian process regression to model the non-resonant di-photon background. The observed (expected, assuming the Standard Model signal) upper limit at the 95% confidence level on the cross-section for producing a Higgs boson and at least one charm-quark-containing jet that passes a fiducial selection is found to be 10.6 pb (8.8 pb). The observed (expected) measured cross-section for this process is 5.3 ± 3.2 pb (2.9 ± 3.1 pb)

Combination of searches for Higgs boson decays into a photon and a massless dark photon using pp collisions at s= 13 TeV with the ATLAS detector

A combination of searches for Higgs boson decays into a visible photon and a massless dark photon (H → γγd) is presented using 139 fb−1 of proton-proton collision data at a centre-of-mass energy of s = 13 TeV recorded by the ATLAS detector at the Large Hadron Collider. The observed (expected) 95% confidence level upper limit on the Standard Model Higgs boson decay branching ratio is determined to be B(H → γγd) < 1.3% (1.5)%. The search is also sensitive to higher-mass Higgs bosons decaying into the same final state. The observed (expected) 95% confidence level limit on the cross-section times branching ratio ranges from 16 fb (20 fb) for mH = 400 GeV to 1.0 fb (1.5 fb) for mH = 3 TeV. Results are also interpreted in the context of a minimal simplified model

Search for a light CP-odd Higgs boson decaying into a pair of τ-leptons in proton-proton collisions at s = 13 TeV with the ATLAS detector

Abstract : This paper reports a search for a light CP-odd scalar resonance with a mass of 20 GeV to 90 GeV in 13 TeV proton-proton collision data with an integrated luminosity of 140 fb−1 collected with the ATLAS detector at the Large Hadron Collider. The analysis assumes the resonance is produced via gluon-gluon fusion and decays into a τ+τ− pair which subsequently decays into a fully leptonic $${\mu}^{+}{ u}_{\mu }{\overline{ u}}_{\tau }{e}^{-}{\overline{ u}}_e{ u}_{\tau }$$ μ + ν μ ν ¯ τ e − ν ¯ e ν τ or $${e}^{+}{ u}_e{\overline{ u}}_{\tau }{\mu}^{-}{\overline{ u}}_{\mu }{ u}_{\tau }$$ e + ν e ν ¯ τ μ − ν ¯ μ ν τ final state. No significant excess of events above the predicted Standard Model background is observed. The results are interpreted within a flavour-aligned two-Higgs-doublet model, and a model-independent cross-section interpretation is also given. Upper limits at 95% confidence level between 3.0 pb and 68 pb are set on the cross-section for producing a CP-odd Higgs boson that decays into a τ+τ− pair