429 research outputs found
First simultaneous measurement of single and pair production of top quarks in association with a Z boson at the LHC
No full textIn this work, for the first time, single and pair production of top quarks in association with a Z boson (tZq, tWZ and ttZ) are measured simultaneously and differentially. A multiclass neural network is used to separate the signal and the backgrounds. Compared to previous studies, the simultaneous measurement is less dependent on the signal modeling assumptions and improves the sensitivity to new physics scenarios, as it enables to constrain possible deviations from the standard model across different processes
Precision measurement of the tt production cross section
No full textMeasurement of the top quark pair production cross-section at 13.0 TeV based on 59.8 fb-1 of 2018 CMS data is presented. New method combining both dilepton and lepton+jets channels is used to constraint lepton and b-tag scale factors
First simultaneous measurement of single and pair production of top quarks in association with a Z boson at the LHC
No full textThe first simultaneous measurement of single and pair production of top quarks in association with a Z boson (tZq, tWZ and ttZ) is presented, including both inclusive anddifferential cross sections. A multiclass neural network is used to separate the signal and the backgrounds. Compared to previous studies, the simultaneous measurement is less dependent on the signal modeling assumptions and improves the sensitivity to new physics scenarios, as it enables to constrain possible deviations from the standard model across different processes.The first simultaneous measurement of single and pair production of top quarks in association with a Z boson (Zq, WZ and Z) is presented, including both inclusive and differential cross sections. A multiclass neural network is used to separate the signal and the backgrounds. Compared to previous studies, the simultaneous measurement is less dependent on the signal modeling assumptions and improves the sensitivity to new physics scenarios, as it enables to constrain possible deviations from the standard model across different processes
Estimation of the van-der-Meer factorization bias using the Beam Imaging Method
No full textAt the CMS Experiment at the LHC, van-der-Meer (vdM) scans are used to calibrate the luminosity measurement. The beam imaging (BI) data, a special type of vdM-scan data, are used to estimate and correct biases coming from the assumption of transverse factorization of the proton-bunch densities. In BI scans one of the beams is kept at rest while the other one moves along the x- or y-axis.In this analysis, the four scans, one for each of the two transverse orientations and two beams, are fit using combinations of Gaussian functions to extract the van-der-Meer factorization bias for LHC Run-2 and Run-3 data
Enzootic ataxia and caprine arthritis/encephalitis virus infection in a New England goat herd
No full textAtaxia was diagnosed in kids from a New England goat herd. Concurrent infection with the caprine arthritis/encephalitis (CAE) virus contributed to the development of hind limb ataxia and weakness in one of the kids. Six kids from this herd had signs of hind limb ataxia and paralysis. Detailed evaluation of 2 of the affected kids revealed low liver and serum copper concentrations and spinal cord demyelination. One kid also had histologic changes in the CNS and lungs, compatible with a diagnosis of CAE. Serum copper concentration was determined in affected goat kids and their dams and was compared with serum copper concentration in clinically normal kids and their dams from the same herd. Serum copper concentration also was measured in dams and kids in a control herd that had no history of ataxia. The mean serum copper concentration in affected kids was 0.125 microgram/ml, compared with 0.45 microgram/ml in unaffected kid herdmates. Kids from the control herd had mean serum copper concentration of 0.6 microgram/ml. Mean serum copper concentration in dams of kids with neurologic signs also was low (0.25 microgram/ml), compared with that (0.5 microgram/ml) in dams of clinically normal kids of the affected herd and that (0.95 microgram/ml) in dams of kids of the control herd. Results of a serologic survey (by use of agar gel immunodiffusion) of the affected herd for CAE indicated that 69.5% of the goats were seropositive. Dietary copper intake was determined to be adequate in this goat herd; therefore, copper deficiency appeared to be conditioned by an interfering substance. However, a search for interfering substances was unrewarding.LR: 20031114; PUBM: Print; JID: 7503067; EIN: J Am Vet Med Assoc 1989 Feb 1;194(3):394; ppublis
INVOLVING STUDENTS IN DESTINING AND DEVELOPING OF ELECTRONIC EDUCATIONAL ENVIRONMENTS IN PHYSICS AS A WAY OF THEIR PERSONALITYORIENTED TRAINING FOR METHODICAL ACTIVITY
No full textThe article reveals the possibilities of training of future teachers of Physics for methodical activity by involving them in destining and developing of electronic information&communication educational environments (EICEE) in school course in Physics.The author defines priority trends of teacher’s activity in teaching of Physics from the standpoint of the competence approach to measuring of physical education quality. They are characterized according to modern requirements. The main types of learners’ activities in Physics(theoretical material acquisition, solving various types of physical problems, making physical experiment confuction, the research carryng out) are represented in the context of the competence approach to organization of educational process. The author reveals the essence and structure of the notion “electronic information&communication educational environment” according to normative and didactic requirements. Integrated model of technology of personality-oriented training of future teachers of Physics for methodical activity is suggested. An algorithm of teacher’s and student’s actions for destining and developing of electronic information&communication educational environment as a type of teacher’s methodical activity is given. The advantages of personality-oriented technology of professional training of future teachers of Physics from the standpoint of individual, activity and competence approaches are defined.</jats:p
INVOLVING STUDENTS IN PROJECTING AND CREATING ELECTRONIC EDUCATIONAL ENVIRONMENTS IN PHYSICS AS A WAY OF THEIR PERSONALITY-ORIENTED TRAINING FOR METHODICAL ACTIVITY
No full textThe article reveals the possibilities of training future teachers of Physics for methodical activity by involving them in projecting and creating electronic information&communicationeducational environments (EICEE) in the school course in Physics.
The author defines priority directions of teacher’s activity in teaching Physics from the standpoint of the competence approach to measuring quality of physical education.They are characterized according to modern requirements. The main types of learners’ activities in Physics (theoretical material acquisition, solving various types of physical problems, making physical experiments, carrying out research)are represented in the context of the competence approach to organization of educational process.
The author reveals the essence and structure of the notion of “electronic information&communicationeducational environment”according to normative and didactic requirements.Integrated model of technology of personality-oriented training of future teachers of Physics for methodical activity is suggested. An algorithm of teacher’s and student’s actions for projecting and creating electronic information&communicationeducational environment as a type of teacher’s methodical activity is given. The advantages of personality-oriented technology of professional training of future teachers of Physics from the standpoint of individual, activity and competence approaches are defined
Explicit real algebraic functions which may have both compact and non-compact preimages
No full textAs a pioneering work we construct explicit real algebraic functions which may
have both compact and non-compact preimages.
The author has obtained explicit real algebraic functions with preimages
satisfying some nice conditions. More precisely, we have given answers to a
considerably revised version of Sharko's question. Sharko originally asked
whether we can have nice smooth functions whose Reeb graphs are as desired. The
Reeb graph of a smooth function of a certain nice class is a natural graph
whose underlying space is the space of all connected components. Such graphs
can have some important topological information of the manifolds.
Our answers are new in having real algebraic functions on non-compact
manifolds with no boundaries. We also avoid using so-called existence theory
and approximation theory whereas we also avoid in our previous studies.Comment: 11 pages, 2 figures, errors corrected whereas main results do not
change, several exposition added, this version is submitted to a refereed
journa
Notes on Reeb graphs of real algebraic functions which may not be planar
No full textThe Reeb graph of a smooth function is a graph being a natural quotient space
of the manifold of the domain and the space of all connected components of
preimages. Such a combinatorial and topological object roughly and compactly
represents the manifold. Since the proposal by Sharko in 2006, reconstructing
nice smooth functions and the manifolds from finite graphs in such a way that
the Reeb graphs are the graphs has been important. The author has launched new
studies on this, discussing construction of real algebraic functions. We
concentrate on Reeb graphs we cannot realize as (natural) planar graphs here.
Previously the graphs were planar and embedded in the plane naturally.Comment: 16 pages, 2 figures, an error in Main Theorem 1 corrected, Example 2
is also an example for this, some proofs such as the proof of Main Theorem 1
etc. revise
Diagnosis of personal results of training in “Professional Ethics”: Problem statement
No full textIntroduction.The article considers the possibility and necessity of diagnosing personal results of training in professional ethics at the level of higher education. The author identifi es special aspects of penitentiary staff performance which determine professionally signifi cant qualities directly related to ethical standards. The role of professional ethics is noted as a factor that can minimize unfavorable circumstances of service, and prevent professional deformation and personal degradation. Theoretical analysis. Attention is drawn to the specifi cs of measuring personal training results and to the given characteristics of diagnostic materials and search experiment data. The possibility of setting a task that requires a detailed substantiated answer for the qualitative diagnosis of personal training results is justifi ed. Conclusions. Analysis of the works showed that cadets (full-time students) and correctional offi cers (extra-mural students) have formed a personal attitude to the main categories of professional ethics. The diff erences lie in the ranking of ethics functions in performance and the nature of reasoning. These diff erences may be due to diff erences in life and professional experience. It is advisable to take into account the data of the search experiment, while preparing the materials of the recording section and organizing training activities of students of subsequent years of recruitment
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