scholarly journals MODERN STRUCTURAL-DYNAMIC ORGANIZATION OF PHYTOCOENOSES AT ENVIRONMENTAL CONTACTS UNDER THE IMPACT OF ANTHROPOGENIC (FIRES, CUTTING, PASTURAGE) FACTORS (South-Western Trans-Baikal, Russia)

2021 ◽  
Vol 11 (3) ◽  
pp. 403-414
Author(s):  
Alexander Sizykh ◽  
◽  
Tatyana Konovalova ◽  
Information ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 109 ◽  
Author(s):  
Nestor Shpak ◽  
Oleh Kuzmin ◽  
Zoriana Dvulit ◽  
Tetiana Onysenko ◽  
Włodzimierz Sroka

The pace and scale of the digitalization of today’s global information society open up new opportunities for business. At the same time, they set new challenges for business owners and managers in the field of marketing. Given this fact, the purpose of the study was to present the impact of digitalization on the marketing activity of the enterprise in the field of services by promoting the use of online sales via electronic distribution channels, social networks, and mobile applications. A comparative system of estimating the parameters of the influence of digitalization on the marketing activity of the enterprise was proposed as a confirmation of this impact. Based on the developed “tree of goals,” the dynamics of the digitalization of services were projected and the prospects of development of this sphere of activity were outlined. For testing the proposed methodology, the railway passenger transportation company (JSC “Ukrzaliznytsia”) was chosen as the object of the research. Research methods used in the study include: (1) statistical; (2) SWOT analysis; (3) systematization, comparative, and structural-dynamic analysis; and (4) an expert survey. As a result of revealing the impact of individual elements of digitalization on the level of marketing activity, the number of recommendations regarding the development of digitalization of electronic ticket sales services and their accounting for enterprises dealing with railway passenger transportation were proposed.


2017 ◽  
Vol 44 (12) ◽  
pp. 1957-1972
Author(s):  
Donald D. Hackney ◽  
Daniel Friesner ◽  
Erica H. Johnson

Purpose The purpose of this paper is to examine whether the timing associated with the implementation of the health insurance-related provisions of the Patient Protection and Affordable Care Act (ACA) altered the presence and distribution of medical/non-medical debts accumulated by different types of bankruptcy filers. Design/methodology/approach Data were drawn from the US Bankruptcy Court’s Eastern Washington District over the years 2009, 2011 and 2014 using interval random sampling. Binary probit and Tobit analyses were used to model the existence, and distribution, of medical debts and total debts, respectively, at the time of filing. The impact of the time frame associated with the ACA was operationalized via a Chow test for structural dynamic change. Findings Chapter 13 filers in 2014 (post-ACA-based health exchange implementation) were more likely to report medical debts than Chapter 7 filers in the pre-intervention period, and were also more likely to report a larger proportion of outstanding debts owed to a single creditor. Filers claiming health insurance premium expenses in 2011 were (at the 10 percent significance level) more likely to report a more skewed distribution of medical debts. Originality/value The time frame associated with the implementation of the ACA impacts the distribution of medical debts among filers who have sufficient net disposable income to fund a Chapter 13 plan. The polarization of outstanding medical debts may indicate coverage gaps in existing health insurance policies, whose costs would be disproportionately borne by patients operating on thin financial margins.


Author(s):  
Zenghu Han ◽  
Vikram N. Shah ◽  
Jeries Abou-Hanna ◽  
Yung Y. Liu

This paper presents the structural dynamic analysis of the 9516 package subjected to two hypothetical accidents in sequence: (1) the 30-ft drop test and (2) the puncture test. The analysis is performed with the general-purpose finite element analysis computer code, ABAQUS, using explicit integration. The 9516 package consists of a containment vessel placed inside a cask mounted inside a steel cage, which acts as the impact limiter and the personnel shield. The cask has a bolted closure that provides the confinement to the containment vessel. The closure bolts initially were modeled with one-dimensional elastic connector elements bearing only the axial loads, which was adequate for the analysis of the drop test. However, the closure lid experienced significant bending during the puncture test, implying bending load acting on the closure bolts. Therefore, the closure bolts were modeled by using solid elements in a refined model so that the response to the bending load during the puncture test can be simulated. The results of the analysis showed that the closure bolts experience significant bending during the puncture test. For model validation, a comparison between the analysis results and the test results for rigid body accelerations of the package is presented. The results of the analysis based on the refined model show that the maximum stress intensities in the closure bolts, containment vessel, and cask are lower than the corresponding allowable stresses specified in the American Society of Mechanical Engineering Boiler and Pressure Vessel Code.


2005 ◽  
Vol 26 (1) ◽  
pp. 37-61 ◽  
Author(s):  
Monty L. Lynn

Organizations generally are more innovative, relevant, and responsive when they are exposed to market influences, yet they must regulate or limit the impact of outside influences to operate efficiently. This dynamic organization-environment tension has inspired the creation of several models of organizational buffering which delineate the systematic exposure and insulation of organizations from environmental uncertainty. We review three buffering paradigms — core, minimalist, and dispersed — and attempt to synthesize a model which weaves these perspectives together. The key to understanding functional and dysfunctional buffering lies with the organization’s requisite variety and continuous or discontinuous environmental change.


2008 ◽  
Vol 45 (5) ◽  
pp. 535-549 ◽  
Author(s):  
Michael Lewis

Major League Baseball and other professional sports leagues have long been concerned with competitive imbalances caused by differences in local revenues. The fear is that in the absence of salary caps or other regulatory mechanisms, smaller-market teams will be unable to remain competitive. This research uses a structural dynamic programming model to analyze ownership's payroll investment decisions. This model estimates the relationship between optimal payrolls and local-market populations and the influence of long-term customer equity dynamics on payroll investments. In addition, the author analyzes the impact of a recent policy intervention that implemented revenue transfers from high-local-revenue markets to low-local-revenue markets. The statistical results indicate that market population has a significant impact on the value of a team's payroll investments. For example, optimal payrolls double as the population increases from 2.5 million to 7.5 million. Furthermore, rather than improving competitive balance, the adoption of revenue sharing has decreased the incentives for small-market teams to remain competitive. The author uses the estimation results to evaluate alternative approaches to managing competitive balance. Specifically, the results suggest that basing revenue-sharing payments on local-market population and (higher) attendance rates reduces payroll dispersion.


2021 ◽  
Vol 20 (2) ◽  
pp. 251-277
Author(s):  
Evgenii L. TOROPTSEV ◽  
Aleksandr S. MARAKHOVSKII

Subject. We address the structure of the economy, its structural defects and distortions. Objectives. The purpose is to introduce the concepts of structural defects and distortions of the economy. These properties of the economic system structure make it difficult to realize the chances of its rapid development. Methods. The theoretical and practical basis of the systems, inter-industry and structural dynamic analysis serve as the components of the study’s methodology. Results. Based on official statistics and our own statistical research base for the digitization of the dynamic model of inter-industry balance, we solved the problem of identification of structural defects and deformations of the economy. The scope of the study's results is the macroeconomic modeling, structural sustainability, assessment of the impact of structural reforms (national projects) on economic growth, and analysis of internal dynamic properties of economic systems at the macro level. Conclusions. We developed principles of identification of structural defects and deformations of macro systems that affect the economic dynamics. Understanding the ‘structural deformation’ as the degradation of inter-industry ties, and the ‘structural defects’ as the manifestations of technological unpreparedness for growth, we can conclude that the Russian economy of 2015, had these two negative properties.


2013 ◽  
Vol 639-640 ◽  
pp. 859-865
Author(s):  
Qiao Yun Wu ◽  
Hong Ping Zhu

The orthogonal polynomial expansion method expression of stochastic structure was deduced. Then, based on orthogonal polynomial expansion method, taking a 20-storey reinforced concrete frame structure as an example, the impact of the randomness of structural parameters on time history response was researched. Meanwhile, in order to verify the correctness of analysis program, the calculation results of orthogonal polynomial expansion method were compared with the Monte-Carlo method which based on Newmark integral. The results show that it can get relatively accurate results when the number of terms of the orthogonal polynomial is 5. Structural mass and stiffness have a greater impact on the structural dynamic response. And the greater number of random parameters, the greater the impact on structural dynamic response.


Author(s):  
Pawel Woelke ◽  
Eric Hansen ◽  
Chad McArthur ◽  
Najib Abboud ◽  
Darren Tennant ◽  
...  

Ship impact is an important loading scenario for analysis and design of bridges, oil platforms, and other marine structures. Ships collision is also a very important design consideration for ship hulls. Designing structures to resist both accidental and intentional ship impact requires characterization of the impact loading history. Standard design practice relies on simplified methods to determine the impact loads, which typically consider only speed and mass of the vessel. However, ship impact is a complicated non-linear structural dynamic event that depends not just on the size and mass of the vessel, but also local stiffening pattern, location and function of the bulkheads, possible ice-strengthening classification, draft, presence of the bulbous bow, and many other factors. Neglecting these factors can lead to overestimation or underestimation of the loads, depending on a specific scenario. The discrepancies between simplified load estimates and detailed finite element analyses are investigated in this paper.


2011 ◽  
Vol 199-200 ◽  
pp. 811-818
Author(s):  
Hua Gu ◽  
Gen Hua Yan

This essay reveals that on the basis of fluid-structure interaction having appreciable impact on auto-vibration of gate structure, analysis and calculation on dynamic response characteristics of gate structural fluid-structure interaction have been conducted. The results indicate that under the same dynamic load the structural dynamic response value with fluid-structure interaction effect considered is remarkably larger than vibration response with fluid-structure interaction effect considering. The calculating results indicate that the largest response increase of typical parts of gate structure is from 50% to 60%. Therefore, as to making calculations on structural dynamic response with fluid-structure interaction effect, the impact flow field exerting on structural response should be taken into consideration.


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