Laser Cooling in the Center-of-Mass System: A Proposal for the Creation of a Monoenergetic Atomic Beam

Optimization of the activities of medical organizations providing primary health care requires the development of new organizational and functional models. The introduction of new approaches to organizing the activities of medical organizations is primarily a step towards patients. The new model is a patient-oriented medical organization, the management of which is based on the use of a process-oriented approach and «lean» technologies. Since 2019, within the framework of the federal project «Development of a primary health care system,» a project has been launched to introduce the «New Model of a Medical Organization Providing Primary Health Care». The implementation of the project is scheduled for 2019-2024 inclusive. The creation and replication of the «new model» is planned for the participation of all subjects of the Russian Federation. The introduction of lean technology methods in the work of medical organizations has reduced the waiting time for doctors, optimized the burden on doctors, reduced the time for obtaining research results, streamlining the process of moving a patient within a medical organization. The creation of an effective quality management system in medical organizations is achieved through the phased implementation of lean-technology.

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Efficient Treatment of Gyroscopic Bodies in the Recursive Solution of Multibody Dynamics Equations

Journal of Computational and Nonlinear Dynamics ◽

10.1115/1.2960470 ◽

2008 ◽

Vol 3 (4) ◽

Cited By ~ 2

Author(s):

Martin M. Tong

Keyword(s):

Center Of Mass ◽

Solution Process ◽

Body System ◽

Efficient Treatment ◽

Composite Body ◽

Recursive Solution ◽

System A ◽

Principal Axes ◽

Solution Methods ◽

The Moment

This paper presents an efficient treatment of gyroscopic bodies in the recursive solution of the dynamics of an N-body system. The bodies of interest include the reaction wheels in satellites, wheels on a car, and flywheels in machines. More specifically, these bodies have diagonal inertia tensors. They spin about one of its principal axes, with the moment of inertia along the transverse axes identical. Their center of mass lies on the spin axis. Current recursive solution methods treat these bodies identically as any other body in the system. The proposition here is that a body with gyroscopic children can be collectively treated as a composite body in the recursive solution process. It will be shown that this proposition improves the recursive solution speed to the order(N−m) where m is the number of gyroscopic bodies in the system. A satellite with three reaction wheels is used to illustrate the proposition.

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HELICITY AMPLITUDES FOR COLLIDING BEAM SCATTERING OF TWO SPIN 1/2 PARTICLES

International Journal of Modern Physics A ◽

10.1142/s0217751x93002149 ◽

1993 ◽

Vol 08 (30) ◽

pp. 5383-5407

Author(s):

T.B. ANDERS ◽

A.O. BARUT ◽

W. JACHMANN

Keyword(s):

Center Of Mass ◽

Mass System ◽

Intermediate Transformation ◽

Beam System ◽

Pair Annihilation ◽

Helicity Amplitudes ◽

Reaction Channels ◽

Invariant Coupling ◽

Exchange Scattering ◽

The One

As a generalization and extension of the extensive tables of polarization asymmetries given in a previous work,1 we present here tables of helicity amplitudes for the scattering of two spin 1/2 particles in the colliding beam system (i.e. two incoming particles with opposite directions but not necessarily of equal momenta). The particles belonging to the same current may have different masses in order to describe particle excitations. The amplitudes are given for six different basic couplings connecting two vector vertices, a vector vertex at the one current and a derivative vector vertex at the other current, two derivative vector vertices, two tensor vertices, and two scalar vertices. The vertices include axial couplings by factors of type 1+cγ5. The amplitudes are written as expressions with 16 components in the six different reaction channels, namely the scattering of two fermions, of two antifermions, and of a fermion and an antifermion, the pair creation by pair annihilation, as well as the exchange scattering for two identical fermions or antifermions. The formulas may be used for an analysis which extracts the invariant coupling functions from the experimental data obtained in the colliding beam system directly without an intermediate transformation to the center of mass system.

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Mahindra First Choice

Putting Purpose Into Practice ◽

10.1093/oso/9780198870708.003.0032 ◽

2021 ◽

pp. 354-362

Author(s):

Ben Jackson ◽

Genevieve Joy

Keyword(s):

Third Party ◽

Repair System ◽

Market Failures ◽

System A ◽

Car Market ◽

System P ◽

First Choice ◽

Used Car ◽

The Creation ◽

Trust Information

Mahindra Firstchoice illustrates the process of ecosystem orchestration in the context of the second-hand car market in India. It describes how Mahindra Firstchoice mapped the ecosystem in relation to six key parties—consumers who were buyers, consumers who were sellers, car manufacturers, independent used-car dealers, independent car service workshops, and banks. It then identified the bottlenecks and ‘pain points’ that afflicted the six parties. The used-car market did not function properly because of lack of trust, information, and transparency and Mahindra Firstchoice worked with the parties to identify solutions to the market failures. These involved, amongst other things, the creation of third-party car inspection services, the establishment of a multi-brand car-dealer franchise, a warranty system, a bluebook of second-hand prices and transactions, and a car diagnosis and repair system.

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LASER COOLING OF AN ATOMIC BEAM WITH HIGH EFFICIENCY

Acta Physica Sinica ◽

10.7498/aps.42.1762 ◽

1993 ◽

Vol 42 (11) ◽

pp. 1762

Author(s):

LIU LIANG ◽

CHEN HONG-XIN ◽

WANG YU-ZHU

Keyword(s):

Laser Cooling ◽

Atomic Beam ◽

High Efficiency

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Inclusive Single-Particle Production at 90° in the Center-of-Mass System for Nuclear Targets and 28.5-GeV/cIncident Protons

Physical Review Letters ◽

10.1103/physrevlett.37.1731 ◽

1976 ◽

Vol 37 (26) ◽

pp. 1731-1734 ◽

Cited By ~ 45

Author(s):

U. Becker ◽

J. Burger ◽

M. Chen ◽

G. Everhart ◽

F. H. Heimlich ◽

...

Keyword(s):

Single Particle ◽

Particle Production ◽

Center Of Mass ◽

Mass System ◽

Nuclear Targets

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Testing Compound Nucleus Hypothesis Across the 17O Nucleus Excitation

EPJ Web of Conferences ◽

10.1051/epjconf/201921102001 ◽

2019 ◽

Vol 211 ◽

pp. 02001 ◽

Cited By ~ 1

Author(s):

Aloys Nizigama ◽

Pierre Tamagno ◽

Olivier Bouland

Keyword(s):

Cross Section ◽

Compound Nucleus ◽

Cross Sections ◽

Center Of Mass ◽

Ground States ◽

Mass System ◽

Resonance Parameters ◽

Second Stage ◽

Reference Framework ◽

Kinetic Transformation

The excited compound nucleus 17O* has been studied over (n,α) and (α,n) cross sections modelling, respectively for 16O and 13C targets in their ground states. The modelling is fulfilled within the Reich-Moore formalism. We were able to calculate the (α,n) cross section by two separate ways: the direct kinematic standard route and by inversion of the (n,α) cross section using the compound nucleus hypothesis. Resonance parameters of the resolved resonance range (0 to 6 MeV) were borrowed from the CIELO project. In a first stage, the modelling is carried out in the referential of the incident particle (either way neutron or α) requesting conversion of the CIELO neutron-type resonance parameters to the α-type. In a second stage, the implementation is uniquely designed in the center of mass system of the excited compound nucleus. The resonance parameters are thus converted in that unique reference framework. The present investigation shows the consistency of the kinetic transformation that relies on the compound nucleus hypothesis.

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K±→π±π0e+e−decay width calculation in the lepton center-of-mass system

EPJ Web of Conferences ◽

10.1051/epjconf/20148105014 ◽

2014 ◽

Vol 81 ◽

pp. 05014

Author(s):

S. R. Gevorkyan ◽

M. H. Misheva

Keyword(s):

Decay Width ◽

Center Of Mass ◽

Mass System

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A Parametric Absorber for Friction-Induced Vibrations

Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C ◽

10.1115/detc2003/vib-48474 ◽

2003 ◽

Cited By ~ 3

Author(s):

Horst Ecker

Keyword(s):

Numerical Methods ◽

Harmonic Function ◽

Stability Limit ◽

Conventional System ◽

Mass System ◽

Main Mass ◽

System A ◽

Excited System ◽

Excitation Force ◽

The Stability

This contribution deals with the suppression of friction-induced vibrations of a mechanical system. A two-mass system is considered, with the main mass excited by a friction-generated self-excitation force and a smaller second mass attached to the main mass. The parameter of the connecting stiffness between the main mass and the absorber mass is a harmonic function of time and represents a parametric excitation. The purpose of the second mass is to act as a “parametric absorber” and to cancel vibrations. Critical values for the damping parameters of the conventional system are calculated, where the system operates on the stability limit. Analytical and numerical methods are employed to determine the stability of the parameter-excited system. A study for selected parameters shows within which limits friction-induced vibrations can be suppressed effectively by a parametric absorber.

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Estimation of leg stiffness using an approximation to the planar spring–mass system in high-speed running

International Journal of Advanced Robotic Systems ◽

10.1177/1729881419890713 ◽

2020 ◽

Vol 17 (1) ◽

pp. 172988141989071

Author(s):

Wei Guo ◽

Changrong Cai ◽

Mantian Li ◽

Fusheng Zha ◽

Pengfei Wang ◽

...

Keyword(s):

Analytical Solution ◽

High Speed ◽

Stance Phase ◽

Center Of Mass ◽

Critical Role ◽

Line Center ◽

Motion Model ◽

Mass System ◽

Leg Stiffness ◽

Wide Range

Leg stiffness plays a critical role in legged robots’ speed regulation. However, the analytic solutions to the differential equations of the stance phase do not exist, of course not for the exact analytical solution of stiffness. In view of the challenge in dealing with every circumstance by numerical methods, which have been adopted to tabulate approximate answers, the “harmonic motion model” was used as approximation of the stance phase. However, the wide range leg sweep angles and small fluctuations of the “center of mass” in fast movement were overlooked. In this article, we raise a “triangle motion model” with uniform forward speed, symmetric movement, and straight-line center of mass trajectory. The characters are then shifted to a quadratic equation by Taylor expansion and obtain an approximate analytical solution. Both the numerical simulation and ADAMS-Matlab co-simulation of the control system show the accuracy of the triangle motion model method in predicting leg stiffness even in the ultra-high-speed case, and it is also adaptable to low-speed cases. The study illuminates the relationship between leg stiffness and speed, and the approximation model of the planar spring–mass system may serve as an analytical tool for leg stiffness estimation in high-speed locomotion.

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