Forest Machinery Crane Compound Scheme Synthesis: Optimization of Hydraulic Cylinder Operating Mechanisms

Previously we published some results of the procedure for the improvement of intermediate technology and machinery performance criteria. The aim of the present paper is to describe the model of the middle level of hierarchy - the optimization of the hydraulic cylinder operating mechanisms. Drive and transmission mechanisms for forest machinery crane synthesis are discussed as optimizations for boom operating mechanisms and outboom operating mechanisms. Concentration is on the static part of this problem. Although the speed of movement of the crane elements affects productivity, it is not taken into account in this study. Future studies will take into consideration a dynamic analysis and output of machinery. The results of this study show the necessity to separate the design of different types of forest machine cranes. For example, for the parallel crane type, a modification of the proposed algorithms is necessary. This paper may be useful for forest machine designers as well as university students, who take courses in forest machine design

Photopion reactions on deltas preexisting in nuclei

Reactions A(\gamma, pi^+p) are considered to proceed through the formation of pion-proton pairs on delta constituents in nuclei. We develop the nonrelativistic operator for \Delta^{++}(\gamma, pi^+)p process in an arbitrary frame. The calculated cross section for C12(\gamma, \pi^+p) reaction is compared to the existing experimental data.Comment: 8 pages, 3 figure

An Infinite Number of Commuting Quantum W^∞\hat{W}_{\infty} Charges in the SL(2,R)/U(1)SL(2,R)/U(1) Coset Model

The conformal non-compact $SL(2,R)/U(1)$ coset model in two dimensions has been recently shown to embody a nonlinear $\hat{W}_\infty$ current algebra, consisting of currents of spin $\geq 2$ including the energy-momentum tensor. In this letter we explicitly construct an infinite set of commuting quantum $\hat{W}_\infty$ charges in the model with $k=1$. These commuting quantum charges generate a set of infinitely many compatible flows (quantum KP flows), which maintain the nonlinear $\hat{W}_\infty$ current algebra invariant.Comment: 15

KAIZEN RESERVES FOR PRODUCTS AND SERVICES QUALITY IMPROVEMENT

Abstract: The paper presents Kaizen analysis and the estimation of the reserves of the quality of functioning of a modern credit organization as an open dynamic self-organizing system. The sphere of bank services (BS) is winning new and new positions in Russian market economy. Its structural and institutional progress has generated the «start quality» of BS within the framework of the systematic and informational quality paradigm: extensive and intensive (qualitative) BS development with the purpose of getting the competitive advantage. The latter is displayed in BS market through the totality of economic relations concerning the satisfaction of consumer BS needs. As a whole the quality of a commercial bank (CB) as a BS producer may appear inefficient only in case of its productivity restriction. Therefore functioning condition which does not limit the productivity is effective under any circumstances and should not be limited by institutional management. Otherwise such regulation will inevitably lead to the suppression of a producer freedom concerning the satisfaction of the needs of a BS consumer whereas the latter quite agrees with any activity which in a pointed manner does not limit BS productivity and thus is quite competitive. As the efficiency criterion the restriction of CB productivity connected with BS production of better quality and in shorter terms is most frequently used Ensuring the BS competitiveness in the market is achieved due to Kaizen reserves allowing the bank to obtain strategic evolution thanks to its ability to constantly and dynamically improve the quality of services and processes with the help of which the CB functions and also to the opportunity to raise the degree of consumer satisfaction. Kaizen theory was formed on the basis of ten key principles (focus on clients, improve constantly, openly acknowledge problems, promote openness, form work groups, manage projects on the inter-functional basis, stimulate the processes of mutual support, develop self-discipline, inform each worker, create Сюй Юй Лун -аспирант кафедры «Экономический анализ и качество»; Герасимов Б.И. -доктор экономических наук, профессор

Bjorken Sum Rule and pQCD frontier on the move

The reasonableness of the use of perturbative QCD notions in the region close to the scale of hadronization, i.e., below \lesssim 1 \GeV is under study. First, the interplay between higher orders of pQCD expansion and higher twist contributions in the analysis of recent Jefferson Lab (JLab) data on the Generalized Bjorken Sum Rule function $\Gamma_1^{p-n} (Q^2)$ at $0.1<Q^2< 3 {\rm GeV}^2$ is studied. It is shown that the inclusion of the higher-order pQCD corrections could be absorbed, with good numerical accuracy, by change of the normalization of the higher-twist terms. Second, to avoid the issue of unphysical singularity (Landau pole at Q=\Lambda\sim 400 \MeV ), we deal with the ghost-free Analytic Perturbation Theory (APT) that recently proved to be an intriguing candidate for a quantitative description of light quarkonia spectra within the Bethe-Salpeter approach. The values of the twist coefficients $\mu_{2k}$ extracted from the mentioned data by using the APT approach provide a better convergence of the higher-twist series than with the common pQCD. As the main result, a good quantitative description of the JLab data down to $Q\simeq$ 350 MeV is achieved.Comment: 10 pages, 3 figures, minor change

Let’s groove : Attachment techniques of Eurasian elk (Alces alces) tooth pendants at the Late Mesolithic cemetery Yuzhniy Oleniy Ostrov (Lake Onega, Russia)

More than 4300 Eurasian elk (Alces alces) incisors, most of them pendants, were found in 84 burials in the Late Mesolithic cemetery of Yuzhniy Oleniy Ostrov, Northwest Russia. We analysed the manufacture techniques of elk teeth (4014), in the collection of the Peter the Great Museum of Anthropology and Ethnography, St Petersburg. A striking observation is that the manufacture of these pendants is similar in all burials. Teeth were worked by carving one or several grooves around the root tip. In addition to grooved ones, a number of teeth were not worked at all. The uniformity of the chosen species, tooth and techniques indicates that strict norms prevailed in the pendant industry. Despite the overall similarity, our study shows some variation in making pendants. A groove can cut the whole circumference of the root, or several distinct grooves can mark opposite sides of the root. Sometimes the grooves are deep and made carefully, and sometimes they are weak and made hastily. A typology of various groove types was created. In many graves, one groove type dominates. We interpret that this inter-burial variation and domination of one type resulted from personal choice and taste based on practicality. Such variation could also be associated with kin identifiers, but we did not find clear support for that in our study. Our study indicates that the groove types as such had no connection with particular ornaments, garments or hanging positions.Peer reviewe

On zero-divisors in group rings of groups with torsion

Nontrivial pairs of zero-divisors in group rings are introduced and discussed. A problem on the existence of nontrivial pairs of zero-divisors in group rings of free Burnside groups of odd exponent $n \gg 1$ is solved in the affirmative. Nontrivial pairs of zero-divisors are also found in group rings of free products of groups with torsion.Comment: 8 pages, to appear in Canadian Math. Bul

M-Theory of Matrix Models

Small M-theories unify various models of a given family in the same way as the M-theory unifies a variety of superstring models. We consider this idea in application to the family of eigenvalue matrix models: their M-theory unifies various branches of Hermitean matrix model (including Dijkgraaf-Vafa partition functions) with Kontsevich tau-function. Moreover, the corresponding duality relations look like direct analogues of instanton and meron decompositions, familiar from Yang-Mills theory.Comment: 12 pages, contribution to the Proceedings of the Workshop "Classical and Quantum Integrable Systems", Protvino, Russia, January, 200

Forecasting the career growth potential of university graduates

This article aims to determine which employability skills best predict career potential. The regression analysis method was used to process the results of a survey of HR managers and it allowed to identify the employability skills that show the highest relationship with promotion. The results of the regression formed models of structural equations. The authors note that job-required leadership skills and information technology skills contribute significantly to the career growth potential of recent graduates. In addition, the authors found that the managerial skills, leadership qualities, and basic literacy skills identified in recent graduates by their employers are the strongest determinants of graduate career potential. The practical implications of the study show that it is important for trainees to develop basic employment skills prior to entering a job, as remedial on-the-job training can hinder career progression