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The complexity of the slewing superstructure (SS) balancing problem derives from the changeability of its geometric configuration, the complexity of working conditions as well as multiple limitations of the possible set of solutions. Having in mind the fact that the existing reference literature does not fully specify the procedure of static stability proof, the aforementioned procedure is presented in detail for the first time in this paper. A major contribution is represented in the classification of the slewing superstructure models into two groups which were named: the ‘a priori’ model (designed image of the SS) and the ‘a posteriori’ model (actual image of the SS). The fundamental stages of the ‘a posteriori’ model development method are presented in the paper. The transformation and validation of the calculation model ‘a priori’ to the calculation model ‘a posteriori’ was conducted on the basis of weighing results. A calculation of the basic parameters of the bucket wheel excavator (BWE) superstructure was conducted for both analyzed models by using the in-house developed software. The ‘a posteriori’ models provide a reliable calculation of the SS static stability and may be used not only for static stability proof of the machine as a whole, but also for load analysis of substructures and elements of BWE and related surface mining machines, such as spreaders. Besides that, the previously mentioned models are of extreme importance for a successful and reliable exploitation and maintenence of the machine since they present the basis for adjustment and control of limiting winch rope forces values, periodic control of mass and center of gravity position, as well as for a possible reconstruction which would be conducted in order to realize better customization of the machine versus operating conditions

There are inadequate numbers of anesthesia providers in many parts of the world. Good quality educational programs are needed to increase provider numbers, train leaders and teachers, and increase knowledge and skills. In some countries, considerable external support may be required to develop self-sustaining programs. There are some key themes related to educational programs in low- and middle-income countries:(1) Programs must be appropriate for the local environment-there is no "one-size-fits-all" program. In some countries, nonuniversity programs may be appropriate for training providers.(2) It is essential to train local teachers-a number of short courses provide teacher training. Overseas attachments may also play an important role in developing leadership and teaching capacity.(3) Interactive teaching techniques, such as small-group discussions and simulation, have been incorporated into many educational programs. Computer learning and videoconferencing offer additional educational possibilities.(4) Subspecialty education in areas such as obstetric anesthesia, pediatric anesthesia, and pain management are needed to develop leadership and increase capacity in subspecialty areas of practice. Examples include short subspecialty courses and clinical fellowships.(5) Collaboration and coordination are vital. Anesthesiologists need to work with ministries of health and other organizations to develop plans that are matched to need. External organizations can play an important role.(6) Excellent education is required at all levels. Training guidelines could help to standardize and improve training. Resources should be available for research, as well as monitoring and evaluation of educational programs.

Buckets are a vital substructure of all digging machines, and are intended for the realisation of the fundamental machine function - soil excavation. This paper presents the results of the experimental-numerical investigation of the cause of the bucket wheel excavator SRs 470 buckets failure. The chemical composition and mechanical properties, the impact toughness, hardness, tendency to cracks and the microstructure were determined using appropriate tests. Experimental examinations of working and residual stresses were performed using strain gauges. The superposition of the experimentally determined working and residual stresses and the calculation of the total principal stresses were conducted using the originally developed procedure presented in this paper. The bucket working stress state was calculated by applying the linear finite element method. Conclusions based on the investigation results show that the main reasons for the buckets failure were the ‘design-in defects’ - oversights made during the procedures of geometrical shaping and material selection. Furthermore, high values of residual stresses, as well as the cold cracking observed on the welded joint of the knife and the bucket body, suggest that the ‘manufacturing-in defects’ also played a significant role in the failure. The superposition of influences of the ‘design-in defects’ and the ‘manufacturing-in defects’ has conditioned the appearance and propagation of long-term fatigue cracks, leading to the total destruction of the buckets. The fact that buckets' failure appeared due to oversights made during geometrical shaping, material selection and manufacturing further points to the importance of the critical approach implementation during the design phase of the earthmoving machines working devices.

The term 'disaster' denotes a low-probability but high-impact event that causes a large number of individuals to become ill or injured. Hospitals are required to have an Emergency Operations Plan (EOP) which describes how a facility will respond to and recover from all hazards. It is inclusive of the six critical elements: communications, resources and assets, safety and security, staff responsibilities, utilities, clinical support activities. The 'all hazards' approach allows ability to respond to a range of emergencies varying in scale, duration, and cause. The EOP addresses response procedures, capabilities and procedures when the hospital cannot be supported by the community, recovery strategies, initiating and terminating response and recovery phases, activating authority and identifies alternate sites for care, treatment and services. The initial response to an emergency begins with recognition that an incident may, or has occurred. In cases where the incident is likely to impact or disrupt routine operations, and may require coordination of efforts and response involvement among hospitals, health care coalition partners, EMS, public health, and environmental health. Key management issues involving situational status, incident characteristics and resource capabilities must be quickly determined and communicated amongst response partners in order to establish a common operating picture. The hospital plays maybe a small but crucial role in this larger picture. It is the epicenter of medical care delivered to those who are injured. Each type of threat presents different challenges to hospitals, which must able to respond to each in some capacity. Given finite resources, however, hospitals must attempt to focus their resources on the most likely and potentially serious scenarios.

Introduction Critically ill patients are at risk of GI hemorrhage from acute mucosal lesion or primarily gastric or duodenal ulcers. Increased gastric acidity and a decrease in gastric mucosal barrier is believed to be the cause. The longer the gastric pH remains below 4 the greater the risk of hemorrhage. Patients most at risk include critically ill (sepsis, burn, trauma including neuro-trauma) patients requiring >48 hours of mechanical ventilation, patients with a coagulopathy, prior history of GI hemorrhage, organ dysfunction (renal, hepatic, cardiac), or with hypotension/shock. Zinner et al defined an Illness Severity Index Score for patients in the Intensive Care Unit (ICU). This can help identify a patient at risk for upper gastrointestinal hemorrhage and who may benefit from interventions to reduce that risk. Overall, we know that there is a good relationship between severity of illness (as determined by, for example, Apache II scores, SIRS score) and incidence of ulceration. Moreover, the longer a patient is in ICU, the more likely they are to have a GI bleeding. As many as 20% of patients may develop clinical GI hemorrhage and if surgery is required mortality can approach 80%. The aim of our study was to evaluate the relationship between Zinner score and bleeding from SRMD in severe trauma and critically ill patients. Methodology The series included 954 patients with severe trauma and critical illnesses, 124 among them with acute bleeding stress ulcers of the stomach and duodenum seen at the Intesive care unit of Clinic for Emergency Surgery, Emergency center, Clinical center of Belgrade, during a 10-year period. Results The incidence of bleeding is low and bleeding develops usually after 7 days of Intensive care unit stay. All of patients received prophylaxis. Thirteen patients underwent operation for control of massive bleeding that was unresponsive to intensive medical therapy. All ulcers were superficial and occurred during clinically stressful circumstances. Overall operative mortality was 54%, and this rate seemed to be related to multiple factors acting together. All patients with clinical significant bleeding were in the group of high Zinner score. Conclusion Zinner score appears to be a good predictor of bleeding in patients with severe trauma and criticall illnesses in Intensive care units.

researches of religious education are becoming more and more complex. Curricula of religious education, its educational efficiency, competence of teachers, possible pros and cons of religious education etc., are only some of problems which attract researcher's attention from different scientific fields dealing with the study of religious education. Based on the mentioned researches a lot of publications were issued, and there were more scientific papers in magazines on religious education which were getting more importance. The key problem of its insufficient efficiency has been connected with realization in school. The research problem in this paper is the contribution of the lecturing of the Orthodox Catechism in the education of the pupils from primary schools for peace and democracy. In the research we started from the hypothesis that the lecturing of the Orthodox Catechism besides the contributions in the development of morale and human qualities of pupil's personality, it can also contribute to the education for peace and democracy. In order to determine that, a research on the sample of 126 teachers of primary schools in the area of Pcinjski District was conducted in January 2018, which was shown in this paper. Data gathered by the Scaler PNOS-DVOUOSDGD (α = 0,81) were processed by Factual analysis and t-test. By the factual analysis three components which indicate to the most frequent contribution of the lecturing of the Orthodox Catechism in the education of pupils for peace and democracy were singled out: 1) morale education, 2) education for democracy and 3) education for peace (KMO = 0,73, common variance = 63,03%, p = 0,000). The results given by t-test shown that there were a significant difference in the assessments of teachers having experience in lecturing of the Orthodox Catechism comparing with other teachers: t = 2, 24, p = 0,014, η = 0, 04 and in the assessments of teachers by Scaler PNOS of the subject and class lecturing: t = 2, 86, p = 0,009, η = 0, 06 on the contribution of the lecturing of the Orthodox Catechism for peace and democracy. Based on the research result didactic implications for quality of lecturing improvement of the Orthodox Catechism were given so as to be in the function of the education of pupils for peace, democracy and mutual understanding of different cultures in multicultural civic society. In order to implement it in the practice, it is necessary the lecturing of the Orthodox Catechism to be designed, prepared, planned, and realized as per the needs of pupils and society, and contents of religious education. Contents of religious education should be of practical character. It is necessary to introduce a curriculum in schools through which pupils will be able to learn on different religious customs. In that way, pupils will be more familiar with their and religious education of others, which will be very useful in the quests of common points for giving incentives to understanding and co-operation. Due to that, duty of democratic society is to make available knowledge on religious, ethnical, and social organization of other minority communities to pupils (Table 7; Chart 1).

Summary In the pediatric age group, most cases of syncope represent benign, neutrally-mediated alterations in vasomotor tone. Due to the global cerebral hypoperfusion, syncope is defined as a transient loss of consciousness followed by spontaneous recovery and/or a state of presyncope, including dizziness, lightheadedness, pallor, diaphoresis and palpitations which may precede the loss of consciousness. These symptoms could be a sign of a life-threatening event in a small subset of patients, even though most causes of syncope in childhood are benign, and life-threatening causes of syncope generally have cardiac etiology. In all these cases, routine evaluation includes history, physical examination and a 12-lead standard electrocardiogram which should be performed. Further investigation is indicated by worrying features which include syncope that occurs without warning, syncope during exercise, history of familial sudden death, and abnormalities on clinical exam or electrocardiography. The fact is that syncope generates great fear of injury or sudden death among parents and doctors, and the main aim of the present paper is to help the physician involved in the care of children to differentiate the life-threatening causes of syncope from the common, more benign neutrally-mediated syncope.

Results are presented for an extraction of the top quark Yukawa coupling from top quark-antiquark (tt) kinematic distributions in the lepton plus jets final state in proton-proton collisions, based on data collected by the CMS experiment at the LHC at s=13 TeV, corresponding to an integrated luminosity of 35.8 fb-1. Corrections from weak boson exchange, including Higgs bosons, between the top quarks can produce large distortions of differential distributions near the energy threshold of tt production. Therefore, precise measurements of these distributions are sensitive to the Yukawa coupling. Top quark events are reconstructed with at least three jets in the final state, and a novel technique is introduced to reconstruct the tt system for events with one missing jet. This technique enhances the experimental sensitivity in the low invariant mass region, Mtt. The data yields in Mtt, the rapidity difference |yt-yt|, and the number of reconstructed jets are compared with distributions representing different Yukawa couplings. These comparisons are used to measure the ratio of the top quark Yukawa coupling to its standard model predicted value to be 1.07-0.43+0.34 with an upper limit of 1.67 at the 95% confidence level. © 2019 CERN.

A measurement of the top quark–antiquark pair production cross section σ t t ¯ in proton–proton collisions at a centre-of-mass energy of 13Te is presented. The data correspond to an integrated luminosity of 35.9fb-1, recorded by the CMS experiment at the CERN LHC in 2016. Dilepton events (e ± μ ∓ , μ + μ - , e + e - ) are selected and the cross section is measured from a likelihood fit. For a top quark mass parameter in the simulation of mtMC=172.5Ge the fit yields a measured cross section σtt¯=803±2(stat)±25(syst)±20(lumi)pb, in agreement with the expectation from the standard model calculation at next-to-next-to-leading order. A simultaneous fit of the cross section and the top quark mass parameter in the powheg simulation is performed. The measured value of mtMC=172.33±0.14(stat)-0.72+0.66(syst)Ge is in good agreement with previous measurements. The resulting cross section is used, together with the theoretical prediction, to determine the top quark mass and to extract a value of the strong coupling constant with different sets of parton distribution functions. © 2019, CERN for the benefit of the CMS collaboration.

Mining is a branch of industry with a high number of occupational injuries, including light, heavy and fatal injuries. In this study, we examined whether socio-demographic characteristics of employees have impact on the type of occupational injuries. The survey was conducted on a sample of 108 employees at the mine "Lece", who differed in terms of their age, the overall length of service, work experience in the mine, the level of education and the position. The results demonstrated that the group of factors such as the age, the overall length of service, and work experience in the mine, showed significant differences when it comes to occupational to injuries, unlike the factors such as education level and the position (workplace).

A search is performed for neutral non-standard-model Higgs bosons decaying to two muons in the context of the minimal supersymmetric standard model (MSSM). Proton-proton collision data recorded by the CMS experiment at the CERN Large Hadron Collider at a center-of-mass energy of 13TeVwere used, corresponding to an integrated luminosity of 35.9fb-1. The search is sensitive to neutral Higgs bosons produced via the gluon fusion process or in association with a bbquark pair. No significant deviations from the standard model expectation are observed. Upper limits at 95% confidence level are set in the context of the mmod+hand phenomenological MSSM scenarios on the parameter tanβas a function of the mass of the pseudoscalar Aboson, in the range from 130 to 600GeV. The results are also used to set a model-independent limit on the product of the branching fraction for the decay into a muon pair and the cross section for the production of a scalar neutral boson, either via gluon fusion, or in association with bquarks, in the mass range from 130 to 1000GeV.

A study is presented of anomalous HVV interactions of the Higgs boson, including its CP properties. The study uses Higgs boson candidates produced mainly in vector boson fusion and gluon fusion that subsequently decay to a pair of τ leptons. The data were recorded by the CMS experiment at the LHC in 2016 at a center-of-mass energy of 13 TeV and correspond to an integrated luminosity of 35.9 fb−1. A matrix element technique is employed for the analysis of anomalous interactions. The results are combined with those from the H→4ℓ decay channel presented earlier, yielding the most stringent constraints on anomalous Higgs boson couplings to electroweak vector bosons expressed as effective cross section fractions and phases: the CP-violating parameter fa3cos(ϕa3)=(0.00±0.27)×10−3 and the CP-conserving parameters fa2cos(ϕa2)=(0.08−0.21+1.04)×10−3, fΛ1cos(ϕΛ1)=(0.00−0.09+0.53)×10−3, and fΛ1Zγcos(ϕΛ1Zγ)=(0.0−1.3+1.1)×10−3. The current dataset does not allow for precise constraints on CP properties in the gluon fusion process. The results are consistent with standard model expectations.

A top quark mass measurement is performed using 35.9fb-1 of LHC proton–proton collision data collected with the CMS detector at s=13TeV. The measurement uses the t t ¯ all-jets final state. A kinematic fit is performed to reconstruct the decay of the t t ¯ system and suppress the multijet background. Using the ideogram method, the top quark mass (m t ) is determined, simultaneously constraining an additional jet energy scale factor (JSF). The resulting value of mt=172.34±0.20(stat+JSF)±0.70(syst)GeV is in good agreement with previous measurements. In addition, a combined measurement that uses the t t ¯ lepton+jets and all-jets final states is presented, using the same mass extraction method, and provides an m t measurement of 172.26±0.07(stat+JSF)±0.61(syst)GeV. This is the first combined m t extraction from the lepton+jets and all-jets channels through a single likelihood function. © 2019, CERN for the benefit of the CMS collaboration.

The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb-1. The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is σ(pp→tZq→t?+?-q)=111±13(stat)-9+11(syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation. © 2019 CERN.

A search for new physics in top quark production is performed in proton-proton collisions at 13TeV. The data set corresponds to an integrated luminosity of 35.9fb-1 collected in 2016 with the CMS detector. Events with two opposite-sign isolated leptons (electrons or muons), and b quark jets in the final state are selected. The search is sensitive to new physics in top quark pair production and in single top quark production in association with a W boson. No significant deviation from the standard model expectation is observed. Results are interpreted in the framework of effective field theory and constraints on the relevant effective couplings are set, one at a time, using a dedicated multivariate analysis. This analysis differs from previous searches for new physics in the top quark sector by explicitly separating t W from t t ¯ events and exploiting the specific sensitivity of the t W process to new physics. © 2019, CERN for the benefit of the CMS collaboration.

Results are reported of a search for supersymmetry in final states with photons and missing transverse momentum in proton-proton collisions at the LHC. The data sample corresponds to an integrated luminosity of 35.9 fb−1 collected at a center-of-mass energy of 13 TeV using the CMS detector. The results are interpreted in the context of models of gauge-mediated supersymmetry breaking. Production cross section limits are set on gluino and squark pair production in this framework. Gluino masses below 1.86 TeV and squark masses below 1.59 TeV are excluded at 95% confidence level.[Figure not available: see fulltext.]. © 2019, The Author(s).

A search for the production of events containing three W bosons predicted by the standard model is reported. The search is based on a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the CMS experiment at the CERN LHC and corresponding to a total integrated luminosity of 35.9 fb-1. The search is performed in final states with three leptons (electrons or muons), or with two same-charge leptons plus two jets. The observed (expected) significance of the signal for W±W±W production is 0.60 (1.78) standard deviations, and the ratio of the measured signal yield to that expected from the standard model is 0.34-0.34+0.62. Limits are placed on three anomalous quartic gauge couplings and on the production of massive axionlike particles.

This paper presents the combinations of single-top-quark production cross-section measurements by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at s = 7 and 8 TeV corresponding to integrated luminosities of 1.17 to 5.1 fb−1 at s = 7 TeV and 12.2 to 20.3 fb−1 at s = 8 TeV. These combinations are performed per centre-of-mass energy and for each production mode: t-channel, tW, and s-channel. The combined t-channel cross-sections are 67.5 ± 5.7 pb and 87.7 ± 5.8 pb at s = 7 and 8 TeV respectively. The combined tW cross-sections are 16.3 ± 4.1 pb and 23.1 ± 3.6 pb at s = 7 and 8 TeV respectively. For the s-channel cross-section, the combination yields 4.9 ± 1.4 pb at s = 8 TeV. The square of the magnitude of the CKM matrix element Vtb multiplied by a form factor fLV is determined for each production mode and centre-of-mass energy, using the ratio of the measured cross-section to its theoretical prediction. It is assumed that the top-quark-related CKM matrix elements obey the relation |Vtd|, |Vts| ≪ |Vtb|. All the |fLVVtb|2 determinations, extracted from individual ratios at s = 7 and 8 TeV, are combined, resulting in |fLVVtb| = 1.02 ± 0.04 (meas.) ± 0.02 (theo.). All combined measurements are consistent with their corresponding Standard Model predictions.[Figure not available: see fulltext.]. © 2019, The Author(s).

A study of the B +→ J / ψ Λ ¯ p decay using proton-proton collision data collected at s = 8 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 19.6 fb−1, is presented. The ratio of branching fractions B(B+→J/ψΛ¯p)/B(B+→J/ψK∗(892)+) is measured to be (1.054 ± 0.057(stat) ± 0.035(syst) ± 0.011(B))%, where the last uncertainty reflects the uncertainties in the world-average branching fractions of Λ ¯ and K*(892) + decays to reconstructed final states. The invariant mass distributions of the J / ψ Λ ¯ , J/ψp, and Λ ¯ p systems produced in the B +→ J / ψ Λ¯ p decay are investigated and found to be inconsistent with the pure phase space hypothesis. The analysis is extended by using a model-independent angular amplitude analysis, which shows that the observed invariant mass distributions are consistent with the contributions from excited kaons decaying to the Λ ¯ p system.