Multicriteria Optimization of a Dynamic System by Methods of the Theories of Similarity and Criteria Importance

The problem of multicriteria optimization of a dynamic model is solved using the methods of the similarity theory and the criteria importance theory. The authors propose the original model of a positional system with two hydraulic actuators, synchronously moving a heavy object with a given accuracy. In order to reduce the number of optimizing parameters, the mathematical model of the system is presented in a dimensionless form. Three dimensionless optimization criteria that characterize the accuracy, size, and quality of the dynamic positioning process are considered. It is shown that the application of the criteria importance method significantly reduces the Pareto set (the set of the best solutions). This opens up the possibility of reducing many optimal solutions to one solution, which greatly facilitates the choice of parameters when designing a mechanical object.

Simulation, Fetishism and World Domination

According to Jean Baudrillard, in a totally functional world people become irrational and subjective, given to projecting their fantasies of power into the efficiency of the system, a state of ‘spectacular alienation’. I argue that Americans as a society have accommodated themselves to such a system to the detriment of their ability to make sense in their public discourse. Baudrillard finds pathology in the system of objects as it determines social relations. In one symptom, people may obsess over a fetish object. For American society, the magical mechanical object is the gun. I show evidence for this weapons fetish in American fiction, cinema, television and serious journalism. Then, using Baudrillard and other analysts, I show how the American obsession with the superior functionality of weapons joins its myth of exceptionality and preference for simulation over reality to create a profound American dream state that protects a very deep sleep.

APPLICATION OF VIBRATION EFFECTS IN BIOFUEL PRODUCTION

The considered effective way of processing by-products of biofuel production. The increase in the productivity of the technological line is achieved through the introduction of new vibration equipment for the primary purification of raw glycerin. This study proposes a new approach to determine the efficient operation of a new machine, which is useful for the purification of glycerol based on the combinatorial process of centrifugation and vibration separation. The mathematical mechanical-rheological evaluations are developed based on the experimental results. Has been proposed to evaluate the rheological characteristics of raw glycerin purification based on the experimental testing. A compression device has been used to determine the value of the unilateral deformation of this material, which allows simulating a condition of a material at various technological modes of processing. In this study, the changes of material properties under centrifugation and vibration separation processes in a vibrocentric machine have been investigated. At a choice of optimum technological parameters of processing of food masses by means of vibration methods of rheology are widely applied. In particular, the interaction of the working body of the machine with the treated environment. In order to find the optimal parameters of the technological regime, the process was considered comprehensively from the standpoint of mechanics and rheology. The methods of mechanics describe the interaction of the working body with the treated environment as a mechanical object; rheology, in turn, allows you to reveal the internal processes in the environment. The system under study can be attributed to the elastic-viscous medium, which is described by a phenomenological model consisting of interconnected elastic and viscous elements.

Approaching the motional ground state of a 10-kg object

The motion of a mechanical object, even a human-sized object, should be governed by the rules of quantum mechanics. Coaxing them into a quantum state is, however, difficult because the thermal environment masks any quantum signature of the object’s motion. The thermal environment also masks the effects of proposed modifications of quantum mechanics at large mass scales. We prepared the center-of-mass motion of a 10-kilogram mechanical oscillator in a state with an average phonon occupation of 10.8. The reduction in temperature, from room temperature to 77 nanokelvin, is commensurate with an 11 orders-of-magnitude suppression of quantum back-action by feedback and a 13 orders-of-magnitude increase in the mass of an object prepared close to its motional ground state. Our approach will enable the possibility of probing gravity on massive quantum systems.

Do newborn boys really tend to prefer a ‘mechanical object’ to a human face? Failure to assess the confounding effect of an exceptionally high caesarean section rate

We review a twenty year old paper on sex differences in human neonatal social perception, and identify a serious issue: a failure to assess whether the results were distorted by an exceptionally high Caesarean Section rate. This is in addition to a number of other methodological weaknesses, which together mean that there is too much ‘noise’ in the data to draw clear conclusions from the results. The paper’s stark conclusion to have ‘demonstrated’ biological sex differences is unsubstantiated and misleading, and it should no longer be considered a reliable reference point.

Logarithms through their history in mathematics education

Over the first century and a half of their discovery, logarithms were seen and understood in a variety of ways. Depending on the mathematical beliefs of an author, they could choose to introduce logarithms as a geometric-mechanical object, or as an index of a geometric progression, or through an exponential equation. The choice of introduction then influenced how their reader viewed and used logarithms, and has implications for teachers today as they attempt to explain this topic. In looking over the works of three authors, Colin MacLaurin, William Frend, and George Peacock, we can see logarithms displayed in three different ways. In combining these presentations with our modern understanding of logarithms as a number, an operation, and a function, we can choose parts of the text that could help current students make sense of a difficult concept. Keywords: history, mathematicians, Cambridge, logarithms, textbook analysis

APPROXIMATION MODEL OF A T TION MODEL OF A TYPICAL MECH YPICAL MECHANICAL OBJEC ANICAL OBJECT WITH DISTRIBUTED PARAMETERS

. The article discusses the method of approximation transformations for the study of a typical mechanical object with distributed parameters. A mathematical description of an object with distributed parameters, which is given in the form of a partial differential equation, and their structural models are considered. An approximation model has been obtained with a number of unique properties that have proven useful in the construction of structural models of electromechanical systems.

Woman as A Dirty Machine: A Question Of Objectification On E.E. Cummings

<p>The pervasiveness of female objectification in the treatment of women by men has been called out as a manifestation of gender hierarchy and domination. This research analyzed the figurative languages used in E.E. Cummings’ poem first she like a piece of ill-oiled to identify his treatment of women seen through the illustration of the persona’s actions, thoughts and feelings. Dynamics of the personas’ sexual relationships are then identified to analyze how aspects of objectification appear in the relation between men and women. In order to reinforce the notion of objectification, dehumanization as its extension is utilized as a supporting theory. It is found that practices of female objectification occur in the poem with varying degrees of intensity and ways that it is conducted. However, the objectification is concealed by the poem’s presentation of women as a sexually liberated being, yet in practice, her sexuality is still being objectified. The objectification extends up to the conduct of dehumanization which reduces the women into a dirty mechanical object.</p>

Words or Images: Insights on How Engineering Students and Engineers Communicate in Practice

This paper examines the use of language (text and verbal communication) across school and work settings. The participants of the study are from two distinct pools — 380 first-year engineering students and 355 industry professionals. To test the study predictions and interpret the results the individual data sets from both studies were reviewed and analyzed. Data suggests that for the professional engineering population, face to face communication was the preferred communication mode for sharing engineering evaluation, communicating difficult concepts, and describing their work product. Email and file sharing were also utilized communication options, but to a lesser extent. Data from students facing a simulated professional assignment (produce a fabrication instruction for assembling a mechanical object) indicated that 94% of the students’ chose to use language to produce fabrication instructions, compared to only 6% of students who used another tool of engineering representation in the form of sketches. Data investigation and outcomes are discussed in terms of prevalence and importance of language in engineering education.