TECHNOLOGY OF PERMANENT MONITORING PARAMETERS OF THE SEA BASE DURING OPERATION OF DRILLING PLATFORMS

Forecasting the process of interaction of the platform - offshore system includes calculations of the base stability. The process of immersing the supports of Jack-up drilling rigs into the bottom ground is accompanied by developing areas of plastic deformation, ground flowing, compaction zones and decomposition zones. This causes significant changes in soil parameters. In the context of this task, it is necessary to ensure the reliability of determining strength characteristics of the underlying grounds of bottom sediments at any given time. For this purpose, it is proposed to carry out geotechnical monitoring of the base of Jack-up using geophysical methods. The application of the geophysical method makes it possible to quickly perform predictive calculations based on actual information. According to the results of geomonitoring, it is possible to fulfil calculations reflecting the actual state of the soils underlying the platform. The interpretation of the results obtained is influenced by the multifactorial nature of the changes in the reflected signal. The environment under study in this case can be considered as a determinate system, which makes it possible to apply asymptotic methods for further research.

Discourse. Dialectical Approach to the Definition of Concept

The article advocates the need of dialectical approach to the definition of concept discourse in the communicative paradigm. As a methodological framework for such approach is proposed a determinate system of structural- semantic models of creation of communicative meaning based on categories, predicates and Aristotle’s topic-dialectic. Dialectic approach allows you to learn the language in a dynamic aspect, i.e. in the natural process of communication, as well as to organize the formed in research practice terminology definitions.

PEMIDANAAN TERHADAP PENGEDAR DAN PENGGUNA NARKOBA : Penelitian Asas, Teori, Norma dan Praktik Peradilan

Formulation types of criminal sanctions (strafsoort) is considered the most appropriate, appropriate and fair for appropriate drugdealers Narcotics Act (Act No. 35of 2009) and Psychotropic Substances Act (Act No. 22 of 1997) andjudicial practicebe assessedfrom the perspective of the principles, theories, norms andjudicial practiceis a system of cumulative-alternative formulation (mixed /combined) between the death penalty, life imprisonment or imprisonment, or a fine, while the length of the formulation of criminals anctions (straafmaat) is considered the most appropriate, appropriateand fair sentenceis a determinate system in the form prescrib edlimit minimum and maximum criminal threats. Punishment for drug user alyzed from the perspective of the principles, theories, norms and practices of its application to the dealers to berelatively severe punishment metedranging from the death penalty, life imprisonment and criminal casesover the past 15-20 years. The nthenature of drug users a sactors (daders) and a victim (victims) in addition to drug crimeshould bedropped also dropped criminal sentencing rehabilitationas stipulated in Article 127 of LawNo. 35 of 2009 for narcoticaddicts. Keywords: Formulation types of criminal sanctions, formulation of criminals anctions (straafmaat)

On the prediction of passive contact forces of workpiece-fixture systems

The prediction of passive forces in a frictional workpiece-fixture system is an important problem, since the contact forces have a strong influence on clamp design and on workpiece accuracy during machining. This paper presents a general method for the computation of passive contact forces. Firstly, an indeterminate system of static equilibrium is defined, in which the passive, frictional contact forces cannot be determined arbitrarily as in an actively controlled robotic multifinger grasp. Then, a locally elastic contact model is used to describe the non-linear coupling between the contact forces and elastic deformations at the contact point. This model captures the essence of the passive contact. Further, a set of ‘compatibility’ equations is given so that the relationship can be developed between the elastic deformations at all contacts and the displacement of the workpiece. Finally, combining the force equilibrium, the locally elastic contact model and the ‘compatibility’ conditions, the passive force computation problem is transformed into a determinate system of non-linear equations governing all of the elastic deformations at all of the passive contacts. By solving the resulting non-linear equations, all passive contact forces can be accurately predicted in the frictional workpiece-fixture system. This method is illustrated with example cases. The method presented here may also have an application to other passive, indeterminate problems such as power grasps in robotics.

On Prediction of Passive Contact Forces of Workpiece-Fixture Systems

Prediction of passive forces in a frictional workpiece-fixture system is an important problem, since the contact forces have a strong influence on clamp design and on workpiece accuracy during machining. This paper presents a general method for the computation of the contact forces. First, based on the rigid-body kinematics, an indeterminate system of static equilibrium is defined, in which the passive, frictional contact forces cannot be determined arbitrarily as in an actively controlled robotic multi-finger grasp. Then, we define a locally elastic contact model to describe the nonlinear coupling between the contact forces and elastic deformations at the contact point. This model captures the essence of the passive contact. Further, a set of “compatibility” equations are given so that the elastic deformations among all passive contacts in the workpiece-fixture system result in a consistent set of rigid-body displacement of the workpiece in its global system. Finally, combining the locally elastic contact model and the “compatibility” conditions, we transform the force computation problem into a determinate system of nonlinear equations governing all of the elastic deformations at all of the passive contacts. By solving the resulting nonlinear equations with frictional constraints, we can accurately predict all contact forces in the frictional workpiece-fixtures system. This method is illustrated with example cases. The method presented here may also have an application to other passive, indeterminate problems such as power grasps in robotics.

Shaft Alignment Using Strain Gages

A detailed description of the strain-gage shaft alignment procedure is presented, including a comparison between bearing reactions obtained using strain gages and hydraulic jacking. The various gage configurations available for measuring bending moments are discussed and estimates of the resulting error in bending moment are given. A simplified procedure is presented to calculate bearing reactions from the measured moments. Gage site requirements to produce a determinate system are established and a method is outlined to establish bearing reaction error bounds for a combination of gage configurations and sites.

Mathematical Model of a Three-Dimensional Non-Isothermal Glacier

A mathematical model is constructed for land glaciers with the thickness much less than the horizontal dimensions and radii of curvature of large bottom irregularities by means of the method of a thin boundary layer in dimensionless orthogonal coordinates. The dynamics are described by a statically determinate system of equations, so the solution for stresses is found. For the general non-isothermal case the interrelated velocity and temperature distributions are calculated by means of the iteration of solutions for velocity and for temperature. Temperature distribution is determined by a parabolic equation with a small parameter at the senior derivative. Its solution is reduced to the solution of a system of recurrent non-uniform differential equations of the first order by means of a series expansion of the small parameter. A relatively thin conducting boundary layer adjoins the upper and lower surfaces of a glacier, playing the role of a temperature damper in the ablation area. For ice divides, the statically indeterminate problem is solved, so the result for stresses depends on the temperature distribution.