Relevant bibliographies by topics / Labor turnover Mathematical models

Academic literature on the topic 'Labor turnover Mathematical models'

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Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Labor turnover Mathematical models"

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Gemmell, Neil J., Aidin Jalilzadeh, Raphael K. Didham, Tanya Soboleva, and Daniel M. Tompkins. "The Trojan female technique: a novel, effective and humane approach for pest population control." Proceedings of the Royal Society B: Biological Sciences 280, no. 1773 (December 22, 2013): 20132549. http://dx.doi.org/10.1098/rspb.2013.2549.

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Humankind's ongoing battle with pest species spans millennia. Pests cause or carry disease, damage or consume food crops and other resources, and drive global environmental change. Conventional approaches to pest management usually involve lethal control, but such approaches are costly, of varying efficiency and often have ethical issues. Thus, pest management via control of reproductive output is increasingly considered an optimal solution. One of the most successful such ‘fertility control’ strategies developed to date is the sterile male technique (SMT), in which large numbers of sterile males are released into a population each generation. However, this approach is time-consuming, labour-intensive and costly. We use mathematical models to test a new twist on the SMT, using maternally inherited mitochondrial (mtDNA) mutations that affect male, but not female reproductive fitness. ‘Trojan females’ carrying such mutations, and their female descendants, produce ‘sterile-male’-equivalents under natural conditions over multiple generations. We find that the Trojan female technique (TFT) has the potential to be a novel humane approach for pest control. Single large releases and relatively few small repeat releases of Trojan females both provided effective and persistent control within relatively few generations. Although greatest efficacy was predicted for high-turnover species, the additive nature of multiple releases made the TFT applicable to the full range of life histories modelled. The extensive conservation of mtDNA among eukaryotes suggests this approach could have broad utility for pest control.
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Mishchenko, V., L. Taraniuk, and I. Domnina. "PREVENTIVE ASSESSMENT OF THE FINANCIAL CONDITION OF THE ENTERPRISE FROM THE POSITION OF POSSIBLE BANKRUPTCY RELEVANCE OF RESEARCH." Vìsnik Sumsʹkogo deržavnogo unìversitetu, no. 3 (2020): 45–53. http://dx.doi.org/10.21272/1817-9215.2020.3-5.

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Relevance of research. The actualization of the assessment of the financial condition of the enterprise from the standpoint of possible bankruptcy is indisputable, taking into account the impact of both external and internal factors on the work of the enterprise. The purpose of the study: to develop a methodological approach to preventive assessment of the financial condition of the enterprise, taking into account internal and external factors influencing its economic activity from the standpoint of possible bankruptcy. Methodology and scientific methods: methods of comparative analysis, economic-mathematical modeling, system approach are used. Research results: the article considers scientific trends and problems of assessing the financial condition of enterprises using different methodological approaches. The most well-known formed discriminant models of foreign and domestic scientists are characterized, taking into account their advantages and disadvantages in conducting economic assessment of the financial condition of enterprises. Features and possibilities of application of these models at the domestic enterprises of a machine-building complex are stated. The necessity to develop a dynamic operational model of preventive management is substantiated, which makes it possible to take into account both internal and external national factors and foreign indicators. Unlike the existing ones, this model considers not only financial indicators (profitability ratio, current liquidity ratio, asset turnover, autonomy ratio), but also their importance in the dynamics, as well as taking into account external factors of the country in which the company operates. A new methodological approach for assessing the financial condition of the enterprise with the inclusion of national factors of enterprises and performance indicators of foreign economic entities is proposed. The proposed method of assessing the company in the dynamics in relation to each time to the previous year in terms of bankruptcy characterizes the effectiveness of management and is a signal to take precautions regardless of the stage of the life cycle of the enterprise or its products. The information support of this model serves as a basis for the formation of the company's self-management system. Research framework / possibility of using the results: the proposed methodological approach has an international character and can be used by single-industry enterprises of different countries to assess their financial and economic, marketing, organizational, production, logistics activities, especially when looking for business partners. Practical significance: assessment of the bankruptcy probability index at 12 machine-building enterprises of Ukraine was carried out, conclusions were made on the location of enterprises in the bankruptcy zone. Social consequences: the results of this assessment lead to management decisions by the management of machine-building enterprises on the optimization of jobs, labor movement, internal and external staff rotation.
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Rogerson, Richard, Robert Shimer, and Randall Wright. "Search-Theoretic Models of the Labor Market: A Survey." Journal of Economic Literature 43, no. 4 (November 1, 2005): 959–88. http://dx.doi.org/10.1257/002205105775362014.

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We survey the literature on search-theoretic models of the labor market. We show how this approach addresses many issues, including the following: Why do workers sometimes choose to remain unemployed? What determines the lengths of employment and unemployment spells? How can there simultaneously exist unemployed workers and unfilled vacancies? What determines aggregate unemployment and vacancies? How can homogeneous workers earn different wages? What are the tradeoffs firms face from different wages? How do wages and turnover interact? What determines efficient turnover? We discuss various modeling choices concerning wage determination and the meeting process, including recent models of directed search.
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Tashpulatov, A., and A. Fozilov. "Models of Labor Supply and Demand in the Rural Labor Market." Bulletin of Science and Practice 7, no. 11 (November 15, 2021): 254–61. http://dx.doi.org/10.33619/2414-2948/72/31.

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The article discusses the effective use of economic and mathematical methods in the field of rural employment in labor-surplus regions. A large place in the work belongs to the development of a criterion for the optimality of the labor market and limitations in the model. The main focus is on optimizing the supply and demand of labor in rural areas.
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Sadeghi, Azadeh, Roohollah Younes Sinaki, and Gürsel A. Süer. ""Bi-objective Fuzzy Mathematical Models in a Labor-Intensive Cell"." Procedia Manufacturing 17 (2018): 222–29. http://dx.doi.org/10.1016/j.promfg.2018.10.040.

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Merkle, Lucie, and Klaus F. Zimmermann. "The Demographics of Labour Turnover: A Comparison of Ordinal Probit and Censored Count Data Models." Recherches économiques de Louvain 58, no. 3-4 (1992): 283–306. http://dx.doi.org/10.1017/s0770451800044080.

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SummaryAs has been found in previous studies, the labor market performance of individuals is often affected by demographic determinants like cohort size, age, marriage status and family size. While most of this analysis was studied for earnings, the paper investigates the issue for labor mobility. Mobility is measured here by the number of new employers and the frequency of unemployment of an individual in a particular period. Given the discrete nature of the data, the ordinal probit model and the censored Poisson as the censored negative binomial model was estimated. Since the choice of the statistical model is not clear a priori, various model comparisons are carried out and some new pseudo-R2 measures are proposed and used in the analysis. Results indicate that demographic determinants matter for labor mobility.
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GLASS, JENNIFER L., and SARAH BETH ESTES. "Workplace Support, Child Care, and Turnover Intentions among Employed Mothers of Infants." Journal of Family Issues 17, no. 3 (May 1996): 317–35. http://dx.doi.org/10.1177/019251396017003002.

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This article looks at the determinants of job turnover among mothers of infants, using intentions to change jobs or exit the labor force assessed at 1 year postpartum among a sample of 246 employed mothers. Hypotheses were that exit intentions should be more influenced by household factors determining labor supply and other personal characteristics indicating job attachment. Additionally, whereas both types of turnover intentions should decrease as workplace supports for mothers increase, child care satisfaction should affect exit intentions more than intentions to change jobs. Results showed support for the notion that labor force exits are more strongly influenced by child care problems and measures of job attachment than are job changes, though models correcting for selectivity reveal that the child care problems are not directly influencing exit intentions. Supervisor and co-worker support impede intentions to both exit the labor force and change jobs. However, other dimensions of workplace support affected intentions to exit and intentions to change jobs differently.
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Baron, James N., Michael T. Hannan, and M. Diane Burton. "Labor Pains: Change in Organizational Models and Employee Turnover in Young, High‐Tech Firms." American Journal of Sociology 106, no. 4 (January 2001): 960–1012. http://dx.doi.org/10.1086/320296.

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Debiec, Jozef, Jessamyn Conell-Price, Jennifer Evansmith, Steven L. Shafer, and Pamela Flood. "Mathematical Modeling of the Pain and Progress of the First Stage of Nulliparous Labor." Anesthesiology 111, no. 5 (November 1, 2009): 1093–110. http://dx.doi.org/10.1097/aln.0b013e3181ba3f28.

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Background Patient characteristics may contribute to the progress and pain of labor. Quantitative evaluation of the effects of patient characteristics requires robust mathematical models of labor progress and labor pain. Methods The authors retrospectively studied 100 sequential deliveries from each of five self-reported ethnic groups (Asian, Black, Hispanic, Other, and White). Demographic variables, cervical dilation, and numerical rating scores for pain before analgesia and cervical dilation were abstracted from the automated medical record. Labor progress was modeled with a biexponential function describing the latent and active phases of labor. Labor pain was modeled as a sigmoid function of cervical dilation by using a previously validated mathematical model. The covariates, including self-described ethnicity, were analyzed with NONMEM. Results The biexponential function described the time course of labor progress better than several alternative functions, including the sigmoidal function introduced by Friedman. The sigmoidal function of labor pain described its dynamic nature well, with substantial intersubject variability. Asian women had slower active labor than other ethnicities (P < 0.01). Asian women also reported less pain during their labor compared to all other patients (P < 0.001). Slower labor progress was associated with less rapid progression of pain, but this did not obviate the effect of Asian ethnicity on pain. Neuraxial analgesia is strongly associated with slower labor (P < 0.0001). Greater maternal weight was associated with slower active labor (P < 0.0001). Conclusions Mathematical models can be used to detect subtle effects of patient covariates on the progress and pain of the first stage of labor. Asian women and heavier women had slower labor and slower onset of labor pain than others. These effects were modest compared with the substantial remaining unexplained subject-to-subject variability in labor progress and labor pain.
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Kostyuchenko, Mikhail, Volodymyr Gogo, Boris Kobilyansky, Oleg Kruzhilko, Ihor Yefremov, Kyrylo Hriadushchyi, and Oleksandr Tkachuk. "ANALYSIS OF PRODUCTION RISK ON EXAMPLES OF MINERS ‘LABOR." JOURNAL of Donetsk Mining Institute, no. 2 (2021): 159–75. http://dx.doi.org/10.31474/1999-981x-2021-2-159-175.

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Objective: Based on the review of the array of publications to analyze the methods and models of general risk assessment, the nature of industrial risks and management processes on the examples of labor of coal miners. Propose a classification of mathematical models of industrial risk and identify the most appropriate model for the work of miners in the stochastic system “man-machine-environment”. Methodology: Applied to the use of situational analysis, qualimetry, probability theory and risk theory, methods of classification of occupational risks. Results: Based on a systematic analysis of multifactorial risks of emergency situations, the essence of industrial risks and management processes on the examples of coal miners, the dominant causes of industrial risk in the ergatic system (“man – machine – environment”), models and methods of risk research. Scientific novelty: For the first time on the basis of the analysis of the reasons, dynamics and consequences of industrial risks the classification of mathematical models of risks which are adapted to ergatic systems of mine production is offered. Practical value: The need for adequate practical application of risk methods and models for the assessment and measurement of industrial hazards has been proven.
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Dissertations / Theses on the topic "Labor turnover Mathematical models"

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Besich, John. "Job embeddedness versus traditional models of voluntary turnover: A test of voluntary turnover prediction." Thesis, University of North Texas, 2005. https://digital.library.unt.edu/ark:/67531/metadc4977/.

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Voluntary turnover has historically been a problem for today's organizations. Traditional models of turnover continue to be utilized in a number of ways in both academia and industry. A newer model of turnover, job embeddedness, has recently been developed in an attempt to better predict voluntary turnover than existing models. Job embeddedness consists of organizational fit, organizational sacrifice, and organizational links. The purpose of this study is to two fold. First, psychometric analyses were conducted on the job embeddedness model. Exploratory factor analyses were conducted on the dimensions of job embeddedness, which revealed a combined model consisting of five factors. This structure was then analyzed using confirmatory factor analysis, assessing a 1, 3, and 5 factor model structure. The confirmatory factor analysis established the use of the 5 factor model structure in subsequent analysis in this study. The second purpose of this study is to compare the predictive power of the job embeddedness model versus that of the traditional models of turnover. The traditional model of turnover is comprised of job satisfaction, organizational commitment, and perceived job alternatives. In order to compare the predictive power of the job embeddedness and traditional model of voluntary turnover, a series of structural equation model analyses were conducting using LISREL. The job embeddedness model, alone, was found to be the best fit with the sample data. This fit was improved over the other two models tested (traditional model and the combination of the traditional and job embeddedness model). In addition to assessing which model better predicts voluntary turnover, it was tested which age group and gender is a better fit with the job embeddedness model. It was found that the job embeddedness model better predicts turnover intention for older respondents and males.
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Guedes, Maria do Carmo Vaz de Miranda. "Mathematical models in capital investment appraisal." Thesis, University of Warwick, 1988. http://wrap.warwick.ac.uk/107492/.

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Kiess-Moser, Paul Michael. "Labor union objectives under a multi-contract period time horizon." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26854.

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Most microeconomic models of Labor unions take the union's membership size as exogenous, and limit union members' time horizons to a single contract period. Particularly for unions allocating employment by means of a seniority system, and for unions facing stochastic demand for labor conditions, these limitations in current union models lead to unsatisfactory predictions of union behavior. In this thesis, an n-period majority voting model of a monopoly union facing a fixed demand for labor schedule and allocating employment by seniority is developed to show the interdependence between the union's present wage choice, the size of the union's future voter pool and its future wage choices. Union members are assumed to predict the union's future voting behavior, and to account for the consequences of the retirement of senior union members. The optimal contract wage is shown analytically to be not lower than that wage which causes the layoff of twice the number of retiring workers per contract period in each contract period, and not to exceed the wage level at which half of the union's present voter pool would lose its union employment. Computer simulation solutions for various demand conditions suggest that after a potential sharp first-period increase in the contract wage, the union's contract wage path follows its analytically derived lower limit - with each contract, union employment declines by twice the number of retirees per contract period. The time path of union employment is shown to be largely independent of anticipated changes in demand for labor. A similar two-period model is developed for stochastic demand for labor conditions. For some cases, the union's wage choice can be shown to be lower when the consequences of this period's wage choice on next period's voter pool are taken into account. Majority voting instability problems cannot be ruled out for this type of model, and are interpreted as a potential cause for a union-internal political process. These seniority-based models are then compared with models where union employment is allocated by a random draw among union members. With nonstochastic demand for labor, this allows for the analysis of discrete changes in union rules, and yields the principal prediction that the union will eventually replace an employment by random draw rule with employment according to seniority. The economic approach to the analysis of union behavior is assessed critically, and put in some perspective by an informal discussion of other union-internal determinants of union behavior. In conclusion, it is suggested that the formal prediction of an ongoing gradual decline in union employment may be usefully amended by considering potential benefits from union size maintenance and union membership rejuvenation.
Arts, Faculty of
Vancouver School of Economics
Graduate
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Summers, Deborah A. "Use of optimization models to solve labor planning and scheduling problems for the service industry." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/24107.

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Kamat, Kuldip U. "Minimizing total tardiness and crew size in labor intensive cells using mathematical models." Ohio : Ohio University, 2007. http://www.ohiolink.edu/etd/view.cgi?ohiou1181108441.

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Beach, Robert R. "Essays in social security: net of benefits tax rates, labor supply, savings and welfare." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54489.

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In the standard case in which the interest rate is assumed to be greater than the rate of population growth, implementation of a social security program leads to a reduction in capital formation and a loss of welfare of the representative individual. This dissertation asks whether the parameters of a stylized social security program can be manipulated to reduce this welfare loss. By attaching weights to the earnings used in computing the average monthly earnings, an instrument is created which the social security administrator can use to manipulate the net marginal tax rates and the relative cost of leisure between years. If, as a result, aggregate savings increase, then steady-state welfare may also increase. The effect of changing the weights in the benefit formula is considered first in a simple three-period partial equilibrium model. Individuals work for two periods and are retired in the third. It is shown, under assumptions of separability, that first-period labor supply must go up and second-period labor supply must go down in response to an increase in the earnings weight attached to the first period. Furthermore, although there is an element of ambiguity, a strong case can be made that aggregate savings must increase. It is also shown that, contrary to intuition, a zero net tax is not neutral and in fact must lead to a reduction in capital formation and welfare. These same issues are then considered in a many-period model in which interest rates and wage rates are allowed to respond to changes in aggregate savings. It is found that alternatives to the current program that provide more weight to earnings of younger workers can reduce the welfare loss by a small amount. Because of the intractability of the many-periods case a computer simulation is used to perform the analysis. In addition, the adjustment costs of a public savings program are considered. (Feldstein, among others, has suggested that social security be used as a vehicle for a public savings program to increase private investment in the economy.) It is shown that while such a program would adversely affect that welfare of a number of generations, these welfare losses are quite small: less than 0.05% for all the cases considered.
Ph. D.
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Macias, Miguel S. "The returns to human capital migration within the Department of Defense civilian internal labor market." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Sep%5FMacias.pdf.

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Chan, Cheuk-ho, and 陳卓豪. "Decomposed network and heuristic approach for rail transport crew scheduling system." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B4257464X.

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Jitsuchon, Somchai. "Three applications of market incompleteness and market imperfection." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0026/NQ38906.pdf.

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Cristini, Annalisa. "OECD activity and commodity prices." Thesis, University of Oxford, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670315.

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Books on the topic "Labor turnover Mathematical models"

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Bertola, Giuseppe. Labor turnover costs and average labor demand. Cambridge, MA: National Bureau of Economic Research, 1991.

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Bertola, Giuseppe. Labour turnover costs and average labour demand. London: Centre for Economic Policy Research, 1991.

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I, Terekhov A., ed. Matematicheskoe modelirovanie dvizhenii͡a︡ kadrov v organizat͡s︡ii͡a︡kh. Moskva: Otdel vychislitelʹnoĭ matematiki AN SSSR, 1986.

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Bertola, Giuseppe. Institutions and labor reallocation. Cambridge, MA: National Bureau of Economic Research, 1996.

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Bertola, Giuseppe. Institutions and labor reallocation. Roma: Banca d'Italia, 1996.

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Abowd, John M. The entry and exit of workers and the growth of employment: An analysis of French establishments. Cambridge, MA: National Bureau of Economic Research, 1996.

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Lazear, Edward P. Firm-specific human capital: A skill-weights approach. Cambridge, Mass: National Bureau of Economic Research, 2003.

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Amadi, Amir A. Understanding international portfolio diversification and turnover rates. Cambridge, Mass: National Bureau of Economic Research, 2006.

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Simmons, R. A dynamic efficiency wage model with shirking and turnover effects. Salford: Department of Economics, University of Salford, 1989.

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Simmons, R. A dynamic efficiency wage model with shirking and turnover effects. Salford: University of Salford, Department of Economics, 1989.

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Book chapters on the topic "Labor turnover Mathematical models"

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Ferri, Piero, and Edward Greenberg. "The Analytical Role of the Labor Market in Long-and Short-Run Models." In Lecture Notes in Economics and Mathematical Systems, 27–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-00831-7_3.

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Theorell, Axel, and Jörg Stelling. "Microbial Community Decision Making Models in Batch and Chemostat Cultures." In Computational Methods in Systems Biology, 141–58. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-85633-5_9.

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AbstractMicrobial community simulations using genome scale metabolic networks (GSMs) are relevant for many application areas, such as the analysis of the human microbiome. Such simulations rely on assumptions about the culturing environment, affecting if the culture may reach a metabolically stationary state with constant microbial concentrations. They also require assumptions on decision making by the microbes: metabolic strategies can be in the interest of individual community members or of the whole community. However, the impact of such common assumptions on community simulation results has not been investigated systematically. Here, we investigate four combinations of assumptions, elucidate how they are applied in literature, provide novel mathematical formulations for their simulation, and show how the resulting predictions differ qualitatively. Crucially, our results stress that different assumption combinations give qualitatively different predictions on microbial coexistence by differential substrate utilization. This fundamental mechanism is critically under explored in the steady state GSM literature with its strong focus on coexistence states due to crossfeeding (division of labor).
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Hurst, Michael E. "Models of Labor Turnover and Unemployment." In The Assimilation of Immigrants in the U.S. Labor Market, 21–37. Routledge, 2018. http://dx.doi.org/10.4324/9781315805085-3.

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"Layoffs and duration dependence in a model of turnover." In Search Models and Applied Labor Economics, 139–60. Cambridge University Press, 1989. http://dx.doi.org/10.1017/cbo9780511572098.008.

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Pokrovskaia, Nadezhda Nikolaevna. "Leisure and Entertainment as a Creative Space-Time Manifold in a Post-Modern World." In Advances in Media, Entertainment, and the Arts, 21–38. IGI Global, 2014. http://dx.doi.org/10.4018/978-1-4666-6190-5.ch002.

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The postmodern overcoming of linear rational reasoning of the modernity creates a new world of deeper understanding and better implementing myth and fairy tale. Today, neither the labor behavior nor the consumer preferences are determined with the classical economic and mathematical models of price. The money (wage for labor or costs for goods and services) is no more able to play the key role in motivating a choice or an effort. The essential factor is the impression, feeling, miracle, and their contribution for defining the identity of the actor, his or her personality. The virtual space is a tool to discover the real internal universe of human beings, including the creative competence, novelty, and innovation. Leisure and entertainment are necessary for this seeking of the human being essence – as actor, creator, and consumer. The chapter is designed to help one understand the real motivation of actors in a post-industrial sector.
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Newman, M. E. J., and R. G. Palmer. "Extinction In The Fossil Record." In Modeling Extinction. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195159455.003.0006.

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Of the estimated one to four billion species that have existed on the Earth since life first appeared here (Simpson 1952), less than 50 million are still alive today (May 1990). All the others became extinct, typically within about ten million years (My) of their first appearance. It is clearly a question of some interest what the causes are of this high turnover, and much research has been devoted to the topic (see, for example, Raup (1991a) and Glen (1994) and references therein). Most of this work has focussed on the causes of extinction of individual species, or on the causes of identifiable mass extinction events, such as the end-Cretaceous event. However, a recent body of work has examined instead the statistical features of the history of extinction, using mathematical models of extinction processes and comparing their predictions with global properties of the fossil record. In this book we will study these models, describing their mathematical basis, the extinction mechanisms that they incorporate, and their predictions. Before we start looking at the models however, we need to learn something about the trends in fossil and other data which they attempt to model. This is the topic of this introductory chapter. Those well versed in the large-scale patterns seen in the Phanerozoic fossil record may wish to skip or merely browse this chapter, passing on to chapter 2, where the discussion of the models begins. There are two primary colleges of thought about the causes of extinction. The traditional view, still held by most palaeontologists as well as many in other disciplines, is that extinction is the result of external stresses imposed on the ecosystem by the environment (Benton 1991; Hoffmann and Parsons 1991; Parsons 1993). There are indeed excellent arguments in favor of this viewpoint, since we have good evidence for particular exogenous causes for a number of major extinction events in the Earth's history, such as marine regression (sealevel drop) for the late-Permian event (Jablonski 1985; Hallam 1989), and bolide impact for the end-Cretaceous (Alvarez et al. 1980; Alvarez 1983, 1987).
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Kruglov, Vladimir Nikolaevich. "Problemy povysheniia konkurentosposobnosti otechestvennoi ekonomiki: ugrozy i vyzovy." In Strategic Directions of the Development of Russian Regions: Issues of Economy, Accountance, Taxification, Economic Security, Theoretical and Applied Finance. Publishing house Sreda, 2022. http://dx.doi.org/10.31483/r-104284.

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The relevance of the material lies in its demand due to changes in the domestic economy under the pressure of various force majeure circumstances (COVID-19, various anti-Russian sanctions from unfriendly countries) and the search for ways out of the current difficult situation. In this way, the author sees the improvement of the project personnel management system to preserve the "human capital" and all its components as one of the target indicators. There is a search for new tools and models for "stitching bottlenecks" in the personnel direction. New vectors of development in the most promising areas are predicted. The methods of empirical research are defined: system analysis, comparative analysis, economic and mathematical methods, observation method and others. One of the main research methods is also the normative method, which allows calculating the main indicators of the use of labor resources in project activities on the basis of appropriate methods.
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Poznyak, Sergiy, and Yurii Kolyada. "FORECASTING THE POTENTIAL OF THE ECONOMIC SYSTEM ON THE BASIS OF THE EXOGENIC GROWTH MODEL." In Integration of traditional and innovation processes of development of modern science. Publishing House “Baltija Publishing”, 2020. http://dx.doi.org/10.30525/978-9934-26-021-6-20.

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The paper considers models of economic growth and the possibility of modifying a suitable model to find the potential for economic growth for the economy of society. The world global economy is studied, presented in terms of societies of the world, in monetary terms and the growth potential of gross domestic product in relation to capital, labor, technological progress, population and other macroeconomic indicators that affect it. Theoretical and methodological significance lies in the description of a fundamentally new method of modeling, which can be used to assess the potential of economic development, proving the dynamics of the coefficients of elasticity of production factors, and proving the hypothesis of declining economic growth. The developed model effectively estimates the potential for economic growth for any country and can be used as a basis for forecasting indicators of potential capital intensity of production and potential gross domestic product. Regarding the practical significance of the obtained results, it should be noted that all changes and numerical values are supported by real data and are a consequence of economic, political or social phenomena in the economy of the country under consideration. In the further research it is possible to develop this model, adding to it new variables which influence economic growth, to update methodology of finding of coefficients as a result of actions of economic agents, instead of only their exogenous influence on economy. The work has three main sections. The first section contains theoretical aspects of estimating the evolutionary economy in the one-dimensional case, it describes the basic theoretical information about the Solow model and other neoclassical and endogenous models of economic growth. The second section describes the possibilities of the Solow model for estimating economic growth potential and theoretical aspects and derives the mathematical basis for estimating economic growth potential. Also in this section describes the implementation of the mathematical base. The third section comments on the results of modeling, based on which detailed conclusions are formed, which summarize the economic, mathematical, analytical and technical work. The simulation results well illustrate the degree of use of economic potential, as well as the impact of capital, technological progress, investment, natural population movement on the efficiency of the economy in terms of many countries. The developed software (as a product of the digital economy) can be used to further improve the model, taking into account more factors.
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Conference papers on the topic "Labor turnover Mathematical models"

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Danylyuk, Iryna, and Lyudmyla Duma. "ECONOMIC - MATHEMATICAL MODELS OF MANAGEMENT OF LABOR RESOURCES OF THE ENTERPRISE." In THEORETICAL AND EMPIRICAL SCIENTIFIC RESEARCH: CONCEPT AND TRENDS. European Scientific Platform, 2020. http://dx.doi.org/10.36074/24.07.2020.v1.02.

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2

Dashko, Y. V., O. V. Vitchenko, and M. I. Kadomtsev. "MATHEMATICAL MODEL OF FUZZY MULTIPARAMETRIC ASSESSMENT OF COMPETENCIES." In INNOVATIVE TECHNOLOGIES IN SCIENCE AND EDUCATION. DSTU-Print, 2020. http://dx.doi.org/10.23947/itno.2020.428-432.

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The article describes one of the possible models of fuzzy multiparametric assessment of students' competencies. The mathematical apparatus of the model is described, taking into account the requirements of fuzzy logic. The concept of competence indicators as generalized characteristics of competencies and as learning outcomes is specified; their comparability with labor functions and (or) labor actions and with the set of KS (Knowledge skills) is taken into account. This model is considered in the synthesis of the "discipline" - "project" categories in the education system.
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Ivanovna Kozlova, Elena, Maxim Andreevich Novak, and Margarita Yuryevna Karlova. "Using Nonlinear Multiple Regression Models to Assess the Impact of Labor Resources and Employment on the Gross Regional Product." In 2020 2nd International Conference on Control Systems, Mathematical Modeling, Automation and Energy Efficiency (SUMMA). IEEE, 2020. http://dx.doi.org/10.1109/summa50634.2020.9280722.

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Zeinali-Davarani, S., A. Sheidaei, and S. Baek. "Towards Patient-Specific Modeling of an Enlarging Abdominal Aortic Aneurysm." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-205488.

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There has been a clear need for better understanding of the progression of abdominal aortic aneurysm (AAA) and obtaining reliable prediction of the AAA rupture. Finite element analysis (FEA) using non-axisymmetric models of AAAs provides better estimation of stress distribution in the aneurysmal wall with complex shapes [1]. However, FEA alone does not provide a mathematical description for the evolution of an AAA through growth and remodeling (G&R). A computational framework for modeling stress-mediated growth and structural remodeling of the arterial wall under physiological and pathological conditions has been suggested using a constrained mixture assumption [2]. Stress-mediated enlargement of intracranial aneurysms has been investigated using idealized axisymmetric geometries [3,4]. The kinetics of stress-mediated turnover of collagen fiber families and degradation of elastin were found to have particular importance in the G&R of aneurysmal wall.
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Wan, William, Laura Hansen, and Rudolph L. Gleason. "A 3-D Constrained Mixture Model for Vascular Growth and Remodeling." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206778.

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It is known that arteries adapt and remodel to changes in their loading conditions. Evolution of mechanical properties of blood vessels is associated with numerous chronic and acute conditions such as hypertension and coronary thrombosis. In addition, treatments such as bypass surgery create loading conditions not seen in normal arteries. Blood vessels used in coronary bypass grafts experience abnormal loading conditions in both circumferential and axial directions. Blood vessels remodel by altering structural components to restore homeostatic values of stress. Such changes may include smooth muscle cell proliferation, migration and collagen synthesis, degradation, and remodeling. While biaxial mechanical tests and organ culture experiments provide values for global variables such as mean stresses and total thickness, mathematical models can help describe local mechanical properties at locations throughout the vessel wall. Experimental observations suggest that constituents of arteries turnover at different rates; thus, it is important that models are able to track individual constituents of the artery separately. Here, we present a 3D constrained mixture model for growth and remodeling of arteries exposed to large changes in flow, pressure, and axial stretch -induced.
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Alves, Tiago, and António R. Andrade. "Scheduling Maintenance Technicians in a Railway Depot." In 2021 Joint Rail Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/jrc2021-60425.

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Abstract This paper presents a mathematical programming model that optimizes the daily schedule of maintenance technicians in a railway depot. The aim of the model is the minimization of the associated labor costs, while assigning the different technicians and skills required for each maintenance task. A case study of a Portuguese train operating company is explored, including many technical constraints imposed by the company. A mixed-integer linear programming model is formulated and applied to the case study, while observing the rolling stock schedule and the maintenance tactical plan. The optimized solution shows that the maintenance team could be shortened, as some workers are not necessary to carry out all maintenance actions, suggesting the need for more flexible maintenance crew scheduling and associated labor conditions. The present model is integrated within a tactical maintenance planning model, which finds a feasible annual maintenance plan for the entire fleet, and an operational maintenance scheduling model, which assigns train units to service tasks and schedules the maintenance tasks within the rolling stock. Together, the three models provide a decision framework that can support maintenance planning and scheduling decisions. Finally, the present maintenance crew scheduling model adds a key aspect to the literature: the skills of maintenance technicians.
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Di, Lei, Gaurav Manish Shah, Yiran Yang, and Cuicui Wei. "Greenhouse Gas Emission Analysis of Integrated Production-Inventory-Transportation Supply Chain Enabled by Additive Manufacturing." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-63822.

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Abstract The manufacturing industry is a major source of greenhouse gas emissions (GHG). Additive manufacturing, owing to its multiple advantages, plays a critical role in innovating the current manufacturing industry, especially from a supply chain perspective. Currently, the majority of research on GHG emissions in the manufacturing industry is focused on traditional manufacturing, either single processes in the supply chain or specific case studies, indicating the lack of models on GHG emissions in additive manufacturing-enabled supply chain structures. In this work, a mathematical model is established to estimate the GHG emissions in both traditional manufacturing and additive manufacturing-enabled supply chains. To explore the advantages of additive manufacturing in terms of fast production and reduced or even eliminated the need for assembly and labor involvement, a unique integrated production-inventory-transportation structure is investigated in additive manufacturing case studies. The results indicate that a potential reduction of 26.43% of GHG emissions can be achieved by adopting the additive manufacturing technique in the supply chain. Also, the impacts of rush order rate, emission intensity, and vehicle GHG emission constant rate on the overall GHG emissions are investigated in the sensitivity analysis. Results indicate that a 20% variation in GHG emission intensity (the amount of CO2eq emissions caused by generating a unit of electricity) can lead to a 6.26% change in the total GHG emissions in additive manufacturing.
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Salnikov, Anton, and Maxim Danilov. "A Centrifugal Compressor Impeller: A Multidisciplinary Optimization to Improve its Mass, Strength, and Gas-Dynamic Characteristics." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-64123.

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The high-loaded centrifugal compressor blisk-type impeller, one of the main low-sized gas-turbine engine components, strongly affects engine efficiency. However, its design is a time-consuming and complex task for several reasons, including its high loading, the large number of structural and technological constraints, and the variety of requirements needed for application to a gas-turbine engine centrifugal compressor impeller (e.g., increased efficiency and strength, minimized weight requirements, etc.). The imposition of several constraints for structure modification of the centrifugal wheels can improve one characteristic but can worsen others. The standard solution for this problem is to use an iterative approach, whereby the design process is reduced to a consistent set of impeller element design problem statements and decisions; these are separate for different analysis disciplines. The main drawbacks to this approach are that it is labor intensive and can cause deterioration of the design quality because this procedure does not consider the design object as a unit. The present work considers a centrifugal compressor wheel design approach based on the use of an integrated multidisciplinary parameterized 3D model. This model includes a number of specialized sub-models that describe the necessary design areas as well as physical process features and phenomena occurring in the designed object. The model also realizes the integration and interaction of sub-models used in an integrated computing space. The proposed approach allows the optimization of the structure based on several criteria, such as the mass of the wheel, stage efficiency, strength, economic indicators, etc. The result of multi-criteria optimization is not a single product design, but a set of optimal Pareto points, which describes a number of centrifugal wheel models. The optimal configuration is selected from this set, based on what is considered the most important criterion. Optimization criteria may vary depending on the problem formulation, but the design technology, parameterization scheme, and choice of multidisciplinary integrated mathematical model are retained. Therefore, in the case of a product requirement correction, a new optimal design will require less time. In aggregate, with the nonlinear constrained optimization application, this approach reduces the total time of the design cycle, decreases development costs, and improves quality.
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Munguia, Maria, Gabriella Shibata, Osvaldo Castro, Spencer Miesner, Sufi Asadi, Anthony De Leon, Allan Hernandez, et al. "Design, Modeling, Simulation, and Testing of Flexible Joint." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-70558.

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Abstract Metal materials are used widely in industry for piping, as they provide desirable material properties for use in harsh environments. In this work, we explore different flexible pipe joint designs that enable fluid transport in flexible heat transfer devices. Flexible joints would allow heat transfer devices to fit in variable cooling areas. The proposed flexible joints will be 3D printed in metal with the goal of maximizing their bending angles, while minimizing volume. The objective of this research is to develop flexible pipes to connect parts involving fluid flow, and we propose three types of flexible joint designs: 1) helical coil spring, 2) torsional coil spring, and 3) serpentine structure. Then, we introduce a low-cost design process to improve these joint designs. Metal 3D printing offers increased design flexibility in comparison to traditional metal manufacturing methods. However, metal 3D printing can be labor intensive and costly, thus the number of design iterations using metal printing should be minimized during the design process. To reduce the frequency of metal prototyping, we used plastic 3D prints for rapid prototyping and evaluation. The flexible joint design considered the effects of pipe shape, pipe size, pipe diameter, free length, and total pipe length. Although mathematical models exist for the three types of flexible designs, they tend to be complex, difficult to implement, and specific to certain types of boundary conditions. In our experience, it is faster and more meaningful to perform experimental parametric studies using plastic prints due to accessibility and cost-effectiveness of plastic 3D printers. However, analytical models do offer significant insights during the design process. Thus, we developed simple analytical models for each of the three types of flexible joint designs which can be used in the initial design phase. Tests were performed to characterize the designs. Then, finite element simulations were performed for plastic prints and these simulations were validated against experimental data. We show that the results from analytical models, finite element simulations, and testing results for plastic prints are consistent, and these tools can be used to predict performance. In this paper, we discuss the following findings: 1) development of simple analytical models, including successes, limitations, and challenges; 2) the role of finite element simulations in the design process; 3) testing results from the three types of joint design; 4) quantification, interpretation, and discussion of testing results.
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