Processing of Seismic-While-Drilling Data from the DrillCAM System Acquired with Wireless Geophones, Top-Drive, and Downhole Vibrations Sensors

We present processing details of seismic-while-drilling data recently acquired on one of the onshore wells by a prototype DrillCAM system with wireless geophones, top-drive, and downhole vibration sensors. The general flow follows an established practice and consists of correlation with a drillbit pilot signal, vertical stacking, and pilot deconvolution. This work's novelty is the usage of the memory-based near-bit sensor with a significant time drift reaching 30-40 minutes at the end of each drilling run. A data-driven automatic time alignment procedure is developed to accurately eliminate time drift error by utilizing the top-drive acceleration sensor as a reference. After the alignment, the processing flow can utilize the top-drive or the near-bit pilots similarly. We show each processing step's effect on the final data quality and discuss some implementation details.

GA-BASED IMPROVEMENT HEURISTIC FOR MINIMIZING MAKESPAN IN A GENERAL FLOW-SHOP SCHEDULING PROBLEM

The study proposes an evolutionary algorithm-based improvement heuristic for the permutation flow-shop problem. The method uses a constructive heuristic to arrive at a good first solution. The GA-based improvement heuristic is used in conjunction with CDS, Gupta's algorithm, and Palmer's Slope Index, which are all well-known constructive heuristics. The method is put to the test on a series of ten issues that vary from 4 to 25 tasks and 4 to 30 machines. The outcomes are also compared to some of the most well-known lower-bound options

SOLUTION OF THE PROBLEM OF FREE FLOW OF ROUGH TWO-DIMENSIONAL WATER FLOW WHEN FLOWING OUT OF A PRESSURE-FREE PIPE

The authors improved the solution of the problem of free spreading of two-dimensional in terms of turbulent potential uniform flows obtained by I.A. Sherenkov. To obtain an analytical solution, the concept of a general flow is used. The conjugation of the solution in the physical plane and in the plane of the velocity hodograph (virtual plane) is used. This made it possible to determine the coordinates of the points of the extreme current line and determine the current parameters leading to an unambiguous analytical solution of the flow geometry.

The Phenomenology of “Nothingness” by Martin Heidegger and Jean-Paul Sartre

This article is devoted to the analysis of the phenomenology “Nothingness” by Martin Heidegger and Jean-Paul Sartre. Through research of existential phe­nomenology, the article also touches on the topic of “mood” as philosophical in­tentionality. Various kinds of “moods”, such as faintness (Verstimmung), ennui (Langeweile), burden (Geworden), inquisitiveness (Neugier), care (Sorge) and conscience (Gewissen), by Martin Heidegger’s and nausea (la nausée), anxiety (l’anxiété), dizziness (le vertige) by Jean-Paul Sartre, is considered in the context of what they may matter in an ontological sense. The phenomenologically under­stood “mood” as a general intentionality towards something is connected with the way in which the existing is able to ask about its own self. In addition, the ar­ticle forms the concept of the original ontological and phenomenological “in­completeness” of any existential experience. It is this incompleteness, this “al­ways-still-not” that provides an existential opportunity to realize oneself not only thrown into the world, but also different from the general flow of being. This “elusive emptiness” is interpreted in the article in accordance with the psychoan­alytic category of “real” (Jacques Lacan).

Simulation of the process of free spreading of a two-dimensional water flow behind pressure-free holes

Introduction. Construction of hydraulic structures must meet high reliability requirements applicable to water supply channels, free-flow pipes, and open spillways. Any analysis of hydraulic structures must take account of the dynamic properties of flows that the structures accommodate. The theory of one-dimensional free flows, used in practice, has a number of general guidelines, but lack any details. The co-authors take advantage of the theory of two-dimensional free flows, namely, the method of characteristics proposed and developed in the works of I.A. Sherenkov. Materials and methods. In her works, B.T. Emtseva suggests that a uniform flow can be coupled with a general flow only with the help of an intermediate “simple wave” flow, but this statement has no proof. We identified and analyzed a general flow in the plane of the hodograph. Thereafter, characteristics of the first family of the flow were determined. A transition to the physical plane of the flow allowed to determine the coordinates of the points of characteristics of the second family. This allowed to find the coordinates of the points of the extreme streamline and to determine its geometry. Results. The proposed mathematical model complied with the system of equations, describing the flow, and the boundary conditions when it was applied to the boundary problem of the free spreading of a stormy, potential, two-dimensional in plan, free, stationary water flow and its free inflow into a wide horizontal smooth channel. Conclusions. The concept of a general flow (previously unknown) and equations of motion in the plane of the velocity hodograph made it possible to theoretically prove its applicability to the problem of free flow spreading. A simple analytical solution is obtained in the plane of the velocity hodograph. The theoretical significance of this mathematical model consists in the possibility of its step-by-step application to practical problems and its complication from the identification of the main regularities of a simplified model of a potential flow to the practical use of simulation results. The implementation of the methodology in the form of software will make it usable by designers of hydraulic structures. This is the first stage of problem solving, and at further stages resistance will be taken into account.

HYDRAULIC JUSTIFICATION FOR THE OPERATION OF THE DEVICE FOR ALLUVIATION OFNARROW-PROFILEDAMS

The construction of protective dams is the most effective means of combating flooding. There are various ways to build protective dams. The alluvial method of constructing protective dams can significantly reduce the cost of their construction. The article describes a method and device for alluvial narrow-profile dams that allows the use of bottom sediments as a building material. The method includes clearing the riverbed from bottom sediments with dredging operations,improving the fl ow capacity during floods. The work is carried out by a dredger and the developed soil in the form of pulp is delivered to the alluvial device. The alluvial device ensures the separation of large fractions of soil from the general flow of pulp and allows the formation of a narrow-profile dam with stable slopes and an antifiltration core. The article offers hydraulic calculations that allow us to justify the design and technological parameters of the method and device for alluvial narrow-profile dams: the values of the fl ow rate and the average speed of the pulp movement in the distribution unit of the device are determined; the dimensions of the inlet opening of the bell are justified; the time of alluvium of one map is determined; the number of outlet openings in the distribution slurry pipelines is justified and their location is specified. Nomograms are constructed that allow us to determine the optimal modes of alluvial dams – the length of the pulp pipeline, the height of the pulp rise, and the time of fi lling the alluvial map.

Feminization of emigration

The subject of study is the Bulgarian women, who for different, mainly economic, reasons emigrate to other countries and how this affects their social and psychological status. During the transition, immigration processes in Bulgaria accelerated. A special feature is the feminization of emigration. With this peculiarity, we get into the general flow of feminization of emigration around the world. Similar are some consequences of this feminization - breaking down families; keeping the children in the hands of spouses and parents who too often fail to cope with the challenge; bribery of children with dry money, which accustom them to laziness and to unacceptable and criminal activities; staying with the status of a non-married woman; loneliness etc.

METHOD FOR SOLVING THE PROBLEM OF FREE SPREADING OF A TURBULENT POTENTIAL FLOW BEHIND A PRESSURE-FREE PIPE

The paper substantiates the design scheme and General formulation of the method for solving the problem of coupling various flows necessary in the practice of hydraulic engineering construction of GTS. In the scheme given in the article, when solving the problem of free spreading of a turbulent two-dimensional water flow with a uniform flow, a simple wave borders, and not a General flow, such as a radial flow. The analysis of the three characteristic zones of the flow. It is proved that a turbulent flow under free spreading transforms into a radial one, and the elements of the radial expansion of the flow are determined. The equations for determining the geometric shape and flow parameters for all three sections of the flow with its free spreading are obtained. The research results in this paper are obtained for the first time and complete the research started in the works of other authors.