ОСОБЛИВОСТІ ПРОВЕДЕННЯ БАГАТООБ’ЄКТНИХ СУДОВО-ПОЧЕРКОЗНАВЧИХ ЕКСПЕРТИЗ

The specifics of multiobject forensic handwriting examination is considered. Urgency of their performing and the importance for making decisions on the case are underlined. Attention is drawn to the solution of specific problems that require different approaches, depending on the nature of research objects. Multistage character of research on a multitude of handwriting objects is singled out and features of a separate stage, namely preliminary research are considered. Importance of this stage for the further research planning, selection of the corresponding separate techniques by expert, construction of expert versions is revealed. It is pointed out that methods of performing multiobject handwriting examination at the stage of preliminary research has features that distinguish it from other handwriting methods. Issues related to familiarization with the submitted materials, verification of comparability of samples and establishment of comparative material sufficiency are touched upon. Importance of resolving the issue regarding the need to send an application by a expert is noted. Also, the completion of the preliminary research stage by the formulation of general and private versions per se of the tasks assigned to expert is noted. Recently expert practice requires from experts not only to update methodological approaches in solving handwriting tasks when granting a large number of objects, but also to improve methods of performing relevant research. Above mentioned sequence of research stages can be one of the types of guarantee for full and comprehensive objective research on a large number of objects, an serve the basis for a correct expert decision. Consideration of the issues of features on the stage of preliminary research in carrying out a multiobject handwriting examination is important for handwriting experts, both beginners and with great experience.Рассмотрена специфика многообъектной судебно-почерковедческой экспертизы. Подчеркнута актуальность их проведения и значение для принятия решений по делу. Обращено внимание на решение конкретных задач, которые требуют разных подходов, в зависимости от характера объектов исследования. Выделен многоступенчатый характер исследования множества почерковых объектов и рассмотрены особенности отдельной стадии – предварительного исследования. Раскрыта важность проведения этого этапа для дальнейшего планирования исследования, выбора экспертом соответствующих отдельных методик, построения экспертных версий. Указано, что методика проведения многообъектных почерковедеских экспертиз уже на стадии предварительного исследования имеет особенности, которые отличают ее от других почерковедческих методик. Затронуты вопросы, касающиеся ознакомления с представленными материалами, проверки сопоставимости образцов и установления достаточности сравнительного материала. Отмечена важность решения вопроса о необходимости направления ходатайства экспертом, а также завершения этапа предварительного исследования формулированием общих и частных версий по сути поставленных эксперту задач. Экспертная практика в последнее время требует от экспертов не только обновления методических подходов к решению почерковедческих задач при предоставлении большого количества объектов, но и усовершенствования методов проведения соответствующих исследований. Приведенная последовательность этапов исследования может быть одним из видов гарантии полного и всестороннего объективного проведения исследования большого количества объектов, служить почвой для принятия правильного экспертного решения. Рассмотрение вопросов особенностей стадии предварительного исследования при проведении многообъектной почерковедческой экспертизы имеет важное значение для экспертов-почерковедов как начинающих, так и с большим опытом работы.Розглянуто специфіку багатооб’єктної судово-почеркознавчої експертизи та особливості її окремої стадії – попереднього дослідження. Наведена послідовність етапів дослідження може бути одним із видів гарантії повного й усебічного об’єктивного проведення дослідження значної кількості об’єктів, слугувати підґрунтям для прийняття вірного експертного рішення

Cryogenic controls for Fermilab's SRF cavities and test facility

A new superconducting radio frequency (SRF) cavities test facility is now operational at Fermilab's Meson Detector Building (MDB). The facility is supplied cryogens from the Cryogenic Test Facility (CTF) located in a separate building 500-m away. The design incorporates ambient temperature pumping for super-fluid helium production, as well as three 0.6-kW at 4.5-K refrigerators, five screw compressors, a helium purifier, helium and nitrogen inventory, cryogenic distribution system, and a variety of test cryostats. To control and monitor the vastly distributed cryogenic system, a flexible scheme has been developed. Both commercial and experimental physics tools are used. APACS+{trademark}, a process automation control system from Siemens-Moore, is at the heart of the design. APACS+{trademark} allows engineers to configure an ever evolving test facility while maintaining control over the plant and distribution system. APACS+{trademark} nodes at CTF and MDB are coupled by a fiber optic network. DirectLogic205 PLC's by KOYO{reg_sign} are used as the field level interface to most I/O. The top layer of this system uses EPICS (Experimental Physics and Industrial Control System) as a SCADA/HMI. Utilities for graphical display, control loop setting, real time/historical plotting and alarming have been implemented by using the world-wide library of applications for EPICS. OPC client/server technology is used to bridge across each different platform. This paper presents this design and its successful implementation

The A‐dependenc of ψ production in π− nucleus collisions at 530 GeV/c

The E672/E706 Spectrometer, located in the MW beam at Fermilab, was used to collect data on events containing a pair of muons in the final state with large effective mass. The momentum of incident pions and protons was 530 GeV/c. Nuclear targets included Be, C, Al, Cu and Pb. We report on a preliminary measurement of the A‐dependence of the per nucleus cross section for forward J/ψ production. The apparatus also detected charged particles and γ’s produced in association with the muon pair. The expected physics results on the hadroproduction of χ states and beauty particles are discussed.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/87663/2/624_1.pd

Charged current events with neutral strange particles in high-energy antineutrino interactions

The results of a study of strange particle production in charged current interactions in the Fermilab 15 ft bubble chamber filled with a heavy Ne---H2 mixture are presented. Production rates and average multiplicities of K0's and [Lambda]'s as functions of W2 and Q2 are given. The experimental data agree well with the quark-parton model predictions if a yield of 0.06 +/- 0.02 of K0's and [Lambda]'s from charm production is included. Upper limits for D-meson production are given and the shape of the charmed quark fragmentation function is discussed. Inclusive production of the K*(890) and [Sigma](1385) resonances is measured and it is shown that only about 5% of the K0 mesons and [Lambda] hyperons results from resonance decays. Relative production rates of neutral strange particles on proton and neutron targets are studied.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/24478/1/0000753.pd

Azolo[1,5-a]pyrimidines and Their Condensed Analogs with Anticoagulant Activity

Hypercytokinemia, or cytokine storm, is one of the severe complications of viral and bacterial infections, involving the release of abnormal amounts of cytokines, resulting in a massive inflammatory response. Cytokine storm is associated with COVID-19 and sepsis high mortality rate by developing epithelial dysfunction and coagulopathy, leading to thromboembolism and multiple organ dysfunction syndrome. Anticoagulant therapy is an important tactic to prevent thrombosis in sepsis and COVID-19, but recent data show the incompatibility of modern direct oral anticoagulants and antiviral agents. It seems relevant to develop dual-action drugs with antiviral and anticoagulant properties. At the same time, it was shown that azolo[1,5-a]pyrimidines are heterocycles with a broad spectrum of antiviral activity. We have synthesized a new family of azolo[1,5-a]pyrimidines and their condensed polycyclic analogs by cyclocondensation reactions and direct CH-functionalization and studied their anticoagulant properties. Five compounds among 1,2,4-triazolo[1,5-a]pyrimidin-7-ones and 5-alkyl-1,3,4-thiadiazolo[3,2-a]purin-8-ones demonstrated higher anticoagulant activity than the reference drug, dabigatran etexilate. Antithrombin activity of most active compounds was confirmed using lipopolysaccharide (LPS)-treated blood to mimic the conditions of cytokine release syndrome. The studied compounds affected only the thrombin time value, reliably increasing it 6.5–15.2 times as compared to LPS-treated blood. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.Funding: This research was funded within the framework of the grant agreement as government subsidies from the federal budget in accordance with paragraph 4 of article 78.1 of the Budget Code of the Russian Federation (Moscow, 1 October 2020, No. 075-15-2020-777)

A Quasi-Model-Independent Search for New Physics at Large Transverse Momentum

We apply a quasi-model-independent strategy ("Sleuth") to search for new high p_T physics in approximately 100 pb^-1 of ppbar collisions at sqrt(s) = 1.8 TeV collected by the DZero experiment during 1992-1996 at the Fermilab Tevatron. Over thirty-two e mu X, W+jets-like, Z+jets-like, and 3(lepton/photon)X exclusive final states are systematically analyzed for hints of physics beyond the standard model. Simultaneous sensitivity to a variety of models predicting new phenomena at the electroweak scale is demonstrated by testing the method on a particular signature in each set of final states. No evidence of new high p_T physics is observed in the course of this search, and we find that 89% of an ensemble of hypothetical similar experimental runs would have produced a final state with a candidate signal more interesting than the most interesting observed in these data.Comment: 28 pages, 17 figures. Submitted to Physical Review

Search for Electroweak Production of Single Top Quarks in ppbar Collisions

We present a search for electroweak production of single top quarks in the electron+jets and muon+jets decay channels. The measurements use ~90 pb^-1 of data from Run 1 of the Fermilab Tevatron collider, collected at 1.8 TeV with the DZero detector between 1992 and 1995. We use events that include a tagging muon, implying the presence of a b jet, to set an upper limit at the 95% confidence level on the cross section for the s-channel process ppbar->tb+X of 39 pb. The upper limit for the t-channel process ppbar->tqb+X is 58 pb.Comment: 11 pages, 2 figures. This is the published versio

Probing BFKL Dynamics in the Dijet Cross Section at Large Rapidity Intervals in ppbar Collisions at sqrt{s}=1800 and 630 GeV

Inclusive dijet production at large pseudorapidity intervals (delta_eta) between the two jets has been suggested as a regime for observing BFKL dynamics. We have measured the dijet cross section for large delta_eta in ppbar collisions at sqrt{s}=1800 and 630 GeV using the DO detector. The partonic cross section increases strongly with the size of delta_eta. The observed growth is even stronger than expected on the basis of BFKL resummation in the leading logarithmic approximation. The growth of the partonic cross section can be accommodated with an effective BFKL intercept of a_{BFKL}(20GeV)=1.65+/-0.07.Comment: Published in Physical Review Letter

GEANT4 : a simulation toolkit

Abstract Geant4 is a toolkit for simulating the passage of particles through matter. It includes a complete range of functionality including tracking, geometry, physics models and hits. The physics processes offered cover a comprehensive range, including electromagnetic, hadronic and optical processes, a large set of long-lived particles, materials and elements, over a wide energy range starting, in some cases, from 250 eV and extending in others to the TeV energy range. It has been designed and constructed to expose the physics models utilised, to handle complex geometries, and to enable its easy adaptation for optimal use in different sets of applications. The toolkit is the result of a worldwide collaboration of physicists and software engineers. It has been created exploiting software engineering and object-oriented technology and implemented in the C++ programming language. It has been used in applications in particle physics, nuclear physics, accelerator design, space engineering and medical physics. PACS: 07.05.Tp; 13; 2

Search for bottom squarks in pbarp collisions at sqrt(s)=1.8 TeV

We report on a search for bottom squarks produced in pbarp collisions at sqrt(s) = 1.8 TeV using the D0 detector at Fermilab. Bottom squarks are assumed to be produced in pairs and to decay to the lightest supersymmetric particle (LSP) and a b quark with branching fraction of 100%. The LSP is assumed to be the lightest neutralino and stable. We set limits on the production cross section as a function of bottom squark mass and LSP mass.Comment: 5 pages, Latex. submitted 3-12-1999 to PRD - Rapid Communicatio