scholarly journals Cost Analysis of Queuing System of Postal Office

2019 ◽  
Vol 7 (1) ◽  
pp. 10-13
Author(s):  
Silvia Ďutková ◽  
◽  
Dominika Hoštáková ◽  
Stanislava Turská ◽  
Jana Kurotová ◽  
...  
Keyword(s):  
Cost Analysis ◽  
Calculation Method ◽  
Simulation Method ◽  
Queuing System ◽  
System Capacity ◽  
Post Office ◽  
Primary Research ◽  
Additional Costs ◽  
The Individual

The paper displays cost analysis of queuing system of particular post office. The selected Post Office is Zilina 1 Post Office in Slovakia. Post office Zilina 1 provides service to almost 4 000 companies and 13 559 households. [1] This paper considers two types of costs. There are costs of services which are associated with increasing or decreasing system capacity. Additional costs are the costs of rejected customers which are costs associated with deciding customers to leave the post office. Aim of this article to indicate the methodology of costs allocation of queuing system of post office and display the costs calculation method of rejected customers. Primary research using the questionnaire and the simulation method proved to be an appropriate tool in this analysis. The results of this paper show the need to take into account the substitutability of the individual services provided at the post office and the repeated arrival of the rejected customer. In the case that a rejected customer requests a service provided also by other postal operators, the post office can deal with loss of customer.

SIMULATION OF A SEA CARGO PORT AS A QUEUING SYSTEM IN ANYLOGIC

2020 ◽  
Vol 4 (26) ◽  
pp. 59-66
Author(s):  
A. G. Morozkov ◽  
◽  
M. R. Yazvenko ◽  
Keyword(s):  
Simulation Model ◽  
Key Words ◽  
Simulation Modeling ◽  
Queue Length ◽  
System Simulation ◽  
Queuing System ◽  
System Model ◽  
System Capacity ◽  
Mathematical Solution ◽  
Structure Simulation

The article presents simplified queuing system model of freight marine port. The article discusses the basic elements of queuing system, its mathematical solution and structure. Simulation model was created using AnyLogic to analyze an effect of system capacity on queue length. The results were analyzed and the solution for queue optimization was proposed. Key words: queuing system, simulation modeling, AnyLogic, marine port, servers, queue.

The Method Research of Production Enterprise Logistics System Integration

2013 ◽  
Vol 734-737 ◽  
pp. 3320-3323
Author(s):  
Kai Wang
Keyword(s):  
System Integration ◽  
Point Of View ◽  
System Capacity ◽  
Enterprise Management ◽  
Logistics System ◽  
Production Scale ◽  
Operation Process ◽  
Enterprise Logistics ◽  
The Individual ◽  
Integrated Logistics

With the expansion of consumer market and production scale, the effect of logistics in the enterprise management is also becoming increasingly prominent. But the individual enterprise's logistics system capacity is limited, can not meet the needs of production and consumption timely and the waste of resources in the operation process are the prominent problems in logistics management. This paper explored the logistics system integration ideas and workable solutions of production enterprise from integrated logistics system point of view.

scholarly journals Demographic and Risk Factor Differences between Children with “One-Time” and “Repeat” Visits to the Emergency Department for Asthma

2021 ◽  
Vol 18 (2) ◽  
pp. 486
Author(s):  
Pavani Rangachari ◽  
Jie Chen ◽  
Nishtha Ahuja ◽  
Anjeli Patel ◽  
Renuka Mehta
Keyword(s):  
Risk Factors ◽  
Emergency Department ◽  
Risk Factor ◽  
Childhood Asthma ◽  
Medical Center ◽  
Academic Medical Center ◽  
Retrospective Chart Review ◽  
Primary Research ◽  
Ed Visits ◽  
The Individual

This retrospective study examines demographic and risk factor differences between children who visited the emergency department (ED) for asthma once (“one-time”) and more than once (“repeat”) over an 18-month period at an academic medical center. The purpose is to contribute to the literature on ED utilization for asthma and provide a foundation for future primary research on self-management effectiveness (SME) of childhood asthma. For the first round of analysis, an 18-month retrospective chart review was conducted on 252 children (0–17 years) who visited the ED for asthma in 2019–2020, to obtain data on demographics, risk factors, and ED visits for each child. Of these, 160 (63%) were “one-time” and 92 (37%) were “repeat” ED patients. Demographic and risk factor differences between “one-time” and “repeat” ED patients were assessed using contingency table and logistic regression analyses. A second round of analysis was conducted on patients in the age-group 8–17 years to match another retrospective asthma study recently completed in the outpatient clinics at the same (study) institution. The first-round analysis indicated that except age, none of the individual demographic or risk factors were statistically significant in predicting of “repeat” ED visits. More unequivocally, the second-round analysis revealed that none of the individual factors examined (including age, race, gender, insurance, and asthma severity, among others) were statistically significant in predicting “repeat” ED visits for childhood asthma. A key implication of the results therefore is that something other than the factors examined is driving “repeat” ED visits in children with asthma. In addition to contributing to the ED utilization literature, the results serve to corroborate findings from the recent outpatient study and bolster the impetus for future primary research on SME of childhood asthma.

scholarly journals Simulation of Queuing System of Post Office

2019 ◽  
Vol 40 ◽  
pp. 1037-1044
Author(s):  
Silvia Ďutková ◽  
Karol Achimský ◽  
Dominika Hoštáková
Keyword(s):  
Queuing System ◽  
Post Office

Pulse Radiolysis and Simulation Computation Studies on Acridine Orange in Aqueous Solutions

1982 ◽  
Vol 37 (1) ◽  
pp. 78-86 ◽  
Author(s):  
Sonja Solar ◽  
Wolfgang Solar ◽  
Nikola Getoff
Keyword(s):  
Aqueous Solutions ◽  
Acridine Orange ◽  
Pulse Radiolysis ◽  
Simulation Method ◽  
Energy Utilization ◽  
Simultaneous Formation ◽  
Chromophore Group ◽  
Extinction Coefficients ◽  
Solar Energy Utilization ◽  
The Individual

Abstract A combined pulse radiolysis-computer simulation method was applied for the elucidation of the complicated multiple H-attack on acridine orange in aqueous solutions at pH = 1 to 3. The simultaneous formation of three intermediates was established: semiquinone (H-addition on the N-atom of the chromophore group), R--species (reaction on the meso-C-atom) and H-adducts on the aromatic ring carbon. Their superimposed spectra were resolved, the individual extinction coefficients and the rate constants for their formation and decay were determined. The results are of importance in particular for understanding the decomposition of acridine orange applied as sensitizer in various devices for solar energy utilization.

The Spectrometric Determination of the Individual Exposure Rate for Gamma Nuclides From an Environmental Radiation Detector

2013 ◽  
Author(s):  
Young-Yong Ji ◽  
Kun Ho Chung ◽  
Wanno Lee ◽  
Doo-Won Park ◽  
Mun-Ja Kang
Keyword(s):  
Calculation Method ◽  
Radiation Detector ◽  
Calibration Procedure ◽  
Radioactive Material ◽  
Exposure Rate ◽  
Environmental Radiation ◽  
Individual Exposure ◽  
The Individual ◽  
Total Ratio

For making the spectrometric determination of the exposure rate from the environment as well as the radioactive material more practical, an accurate calculation method of the individual exposure rate for the detected gamma nuclides from that spectrum should be suggested without the sophisticated calibration procedure. In this study, the calculation method for the individual exposure rate for detected gamma nuclides from a 3″×3″ NaI(Tl) detector was suggested by introducing the concept of the dose rate spectroscopy and the peak-to-total ratio in the energy spectrum for the exposure rate, which means just a form of multiplied counts and the value of a G-factor in the spectrum.

scholarly journals Switching between parathormone (PTH) assays: the impact on the diagnosis of renal osteodystrophy

2013 ◽  
Vol 51 (6) ◽  
Author(s):  
Gabriella Bekő ◽  
Henriett Butz ◽  
Klára Berta ◽  
András Tislér ◽  
Ferenc Olajos ◽  
...  
Keyword(s):  
Calculation Method ◽  
Target Range ◽  
Maintenance Hemodialysis ◽  
Plasma Samples ◽  
Kdigo Guidelines ◽  
Everyday Situation ◽  
The Individual ◽  
The Impact ◽  
Current Guidelines

AbstractClinical guidelines for decision-making in chronic kidney disease (CKD) consider parathormone (PTH) levels. The measured PTH values differ if novel full length PTH(1-84) assays are used instead of earlier intact iPTH assays. In this study we analyzed how the classification of CKD patients alters when iPTH assays are switched to PTH(1-84) assays.Plasma samples were collected prior to dialysis sessions from 110 consecutive CKD patients on maintenance hemodialysis. PTH levels were determined with iPTH assays (Elecsys, Architect and DiaSorin Liaison N-tact) and PTH(1-84) assays (Elecsys and Liaison). Using KDIGO guidelines patients were classified as being below, above and in the recommended target range (RTR) of PTH. The results of classification with different assays were evaluated and, a novel calculation method of RTR was implemented.The prevalence of patients with PTH in RTR is comparable with each assay, but the individual patients differed. PTH(1-84) Elecsys and Liaison assays classified more patients as being below RTR than iPTH Elecsys and Architect but not Liaison N-tact assay (27.3%, 22.7% vs. 41%, 31.8%, and 36.4%, respectively). In turn, PTH(1-84) Elecsys and Liaison assays identified less CKD patients with PTH above the RTR than iPTH except N-tact assays (6.4%, 10% vs. 16.3%, 19%, and 6.3%, respectively). Using our calculation method, our discrimination values for PTH(1-84) assays to achieve classification identical to that with iPTH Elecsys were lower than those recommended by the manufacturer.Current guidelines for the treatment of secondary hyperparathyroidism in CKD should consider the type of assays used for PTH measurement. Each laboratory should assess its own RTR for PTH tests to achieve comparable classification. The presented calculation is simple, it mimics an everyday situation, switching from one assay to another one, and provides useful RTR values for PTH tests.

scholarly journals Economic Assessment of Methods of Coal and Gas Outburst Prevention in the Extraction of Coalfaces

2020 ◽  
Vol 3 (1) ◽  
pp. 379-393
Author(s):  
Vlastimil Hudeček ◽  
Michal Vaněk ◽  
Igor Černý
Keyword(s):  
Economic Assessment ◽  
Simulation Method ◽  
Coal And Gas Outburst ◽  
Optimal Method ◽  
Gas Outburst ◽  
Drift Length ◽  
Mutual Comparison ◽  
Coal And Gas Outbursts ◽  
The Individual ◽  
Prevention Methods

AbstractIn this paper, the authors focused on the assessment of the individual methods to prevent coal and gas outbursts. The first part deals with a characteristic of this anomalous phenomenon and some basic methods of coal and gas outburst prevention. The second part presents the economic assessment of the costs necessary to ensure the possible prevention methods in the coalface 080 211 in the locality of the Paskov Mine, Mining Plant 3, OKD as, Czech Republic. In this coalface, a simulation method was used for calculating costs for the drift length of 100 m for the use of various prevention methods (irrigation, relief boreholes, relief blasting). The results show the cost of preventive measures during mining intended to eliminate and protect against the formation of coal and gas outbursts. The measures are compared applying the principle of the decision analysis. Four criteria are used for the mutual comparison of the methods (costs, effort, efficiency, time consumption). The comparison has shown that the optimal method to prevent coal and gas outbursts is irrigation.

scholarly journals Simulation of a Queuing System of a Post Office in Anylogic Software

2020 ◽  
Vol 22 (2) ◽  
pp. 15-22
Author(s):  
Silvia Dutkova ◽  
Karol Achimsky ◽  
Pawel Drozdziel
Keyword(s):  
Probability Distribution ◽  
Service Time ◽  
Simulation Software ◽  
Queuing System ◽  
System Model ◽  
Cost Calculation ◽  
Post Office ◽  
Input Flow ◽  
Starting Point ◽  
Exponential Probability

This paper displays the design and application of a model that simulates the queuing system of a fictional post office. Starting point for solving more complicated optimization tasks is to create a system model that consists of elements of reality and the relationships between these elements. The key part of the paper includes the model of a queuing system of a post office created in Anylogic simulation software. The model of the post office displays post office with 5 postal counters, a certain input flow and a certain service time with an exponential probability distribution. The model also includes statistics and cost calculation.

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