scholarly journals Fairness of Task Allocation in Crowdsourcing Workflows

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Donglai Fu ◽  
Yanhua Liu
Keyword(s):  
Task Allocation ◽  
Vital Role ◽  
Current Status ◽  
Two Phase ◽  
Allocation Model ◽  
Workflow Execution ◽  
Heuristic Strategies ◽  
Important Challenge ◽  
The Cost

Fairness plays a vital role in crowd computing by attracting its workers. The power of crowd computing stems from a large number of workers potentially available to provide high quality of service and reduce costs. An important challenge in the crowdsourcing market today is the task allocation of crowdsourcing workflows. Requester-centric task allocation algorithms aim to maximize the completion quality of the entire workflow and minimize its total cost, which are discriminatory for workers. The crowdsourcing workflow needs to balance two objectives, namely, fairness and cost. In this study, we propose an alternative greedy approach with four heuristic strategies to address such an issue. In particular, the proposed approach aims to monitor the current status of workflow execution and use heuristic strategies to adjust the parameters of task allocation. We design a two-phase allocation model to accurately match the tasks with workers. The F-Aware allocates each task to the worker that maximizes the fairness and minimizes the cost. We conduct extensive experiments to quantitatively evaluate the proposed algorithms in terms of running time, fairness, and cost by using a customer objective function on the WorkflowSim, a well-known cloud simulation tool. Experimental results based on real-world workflows show that the F-Aware, which is 1% better than the best competitor algorithm, outperforms other optimal solutions in finding the tradeoff between fairness and cost.

scholarly journals RESULTS OF THE NUTRITIONAL PRESERVATION RESEARCH OF THE ALFALFA LAYING ON STORAGE WITH TWO-PHASE COMPACTION

2020 ◽  
Vol 60 (1) ◽  
pp. 264-274
Author(s):  
D.O. Milko ◽  
O.H. Sclyar ◽  
R.V. Sclyar ◽  
G.P. Pedchenкo ◽  
D.P. Zhuravel ◽  
...  
Keyword(s):  
Food Supply ◽  
Nutrient Content ◽  
Livestock Production ◽  
Storage Process ◽  
Main Criterion ◽  
Milk Productivity ◽  
Two Phase ◽  
Modern Manufacturing ◽  
The Cost

In modern manufacturing of livestock production, the outstanding value is allocated for a food supply. The main criterion for evaluating the quality of feed components is the nutrient content of the feed ration. However, in the process of the storage, the maintenance of the nutritious substances decreases for various reasons that are leading to decreasing livestock efficiency and increasing the cost. The results of the use of a two-phase compaction of the forage vegetable components on the example of the alfalfa are given in the article. The dependence coefficient of the nutritional preservation on density of the alfalfa put on storage are also presented in this article. The applied method and the results obtained can be used in the development and design offices to create new equipment based on the two-phase compaction of the fodder vegetable component mixes by preparing them for storage. The application of this method brings to decreasing losses of nutrients in the storage process which reduces the components cost in total with increasing additional weights and the milk productivity.

scholarly journals Assessment of the work conditions of small slaughterhouses in the Thi-Qar governorate in Iraq

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Smeeha Naser Abed ◽  
Rusul Abdulhameed Kadhim ◽  
Dhakam Mohammed Abbas
Keyword(s):  
Water Supply ◽  
Fire Safety ◽  
Cold Water ◽  
Work Conditions ◽  
Vital Role ◽  
Security Requirements ◽  
Current Status ◽  
Cross Sectional ◽  
Safety Measures

Background: Working conditions have a vital role to play in determining health and disability. So, the objective of this study was to assess the work conditions of small slaughterhouses in the Thi-Qar governorate in Iraq.Design and methods: This study is a cross-sectional field survey. A total of twenty-six (26) small slaughterhouses were included as a sample size from the Thi-Qar governorate. The data collection was done by observations of the authors using a questionnaire and specific questions were also directed to the slaughterhouse workers if needed. It was conducted between February and April 2018. The study was planned to demonstrate the current status of small slaughterhouses in terms of water supply facilities, quality of small slaughterhouses building, sanitation practices.Results: All of the small slaughterhouses had a water supply and all they had hot and cold water. Most of the small slaughterhouses had water tanks and put water pipes away from slaughter sites. The proportions ranged from 76.9 to 96.0 for the quality of small slaughterhouses building. With regard to fire safety measures, 96.2% of buildings are supplied with mobile fire extinguishing equipment according to safety and security requirements. Concerning rodent and insects’ control, sixteen (61.5%) of small slaughterhouses use insecticides and pesticides and only six (23.1%) of them use traps for rodents. Most of the small slaughterhouses’ windows (88.5%) were covered with a thin net to prevent the insects from entering.Conclusions: The finding of this study indicated that work conditions of small slaughterhouses were generally adequate in terms of water supply facilities, sanitation practices, ventilation, fire safety measures, and rodents and insects’ control. 

scholarly journals A TWO‐PHASE METHOD FOR THE CAPACITATED FACILITY PROBLEM OF COMPACT CUSTOMER SUB‐SETS

Transport ◽  
2009 ◽  
Vol 24 (4) ◽  
pp. 274-282 ◽  
Author(s):  
Jaroslav Janáček ◽  
Lýdia Gábrišová
Keyword(s):  
Mathematical Model ◽  
Optimal Design ◽  
Facility Location ◽  
Phase Method ◽  
Limited Capacity ◽  
Two Phase ◽  
Capacitated Facility Location ◽  
Compound Method ◽  
The Cost

The cost optimal design of the majority of distribution and servicing systems consists of decisions on a number and on the locations of facilities from which customers’ demands are satisfied; however, there are severe difficulties in solving exact procedures because the underlying mathematical model is NP‐hard. These decisions should respect some additional conditions as a limited capacity of located facilities. The objective is to minimize the overall costs of the system and to satisfy all customers’ demands. In this paper, we enrich the set of constraints by a new requirement called sub‐pool compactness. This property of customer subset influences the quality of vehicle routes subsequently formed in a sub‐set of customers served by the same facility. This paper formulates the problem of the enriched capacitated facility location considering compactness condition, formalizes and studies the property of compactness and suggests the compound method solving this problem.

A Study on Influence of Shape of Aggregate on Strength and Quality of Concrete for Buildings and Pavements

2014 ◽  
Vol 941-944 ◽  
pp. 776-779 ◽  
Author(s):  
Kumar Molugaram ◽  
Jaya S. Shanker ◽  
Adepu Ramesh
Keyword(s):  
Flexural Strength ◽  
Vital Role ◽  
Hardened Concrete ◽  
Cement Concrete ◽  
Strength Tests ◽  
Hardened State ◽  
Different Shapes ◽  
And Performance ◽  
The Cost

Aggregate characteristics of shape, texture and grading influence on workability, finishability, bleeding, pumpability and segregation of fresh concrete and affects the strength, shrinkage, density, and durability of hardened concrete. About 80% of total volume of concrete consists of aggregate. Construction and durability problems have been reported due to poor mixture proportioning and variation on grading. Aggregate characteristics significantly affect the performance of Quality Concrete (QC) both in fresh and hardened state and have an impact on the cost effectiveness. Flaky and elongated particles lead to higher voids than cubical, rounded and well graded particles. The shape factor of aggregate plays a vital role in the design and performance of QC mix and it is mainly depends on the rock formation and type of crusher being used for crushing the aggregates. Flaky and elongated particles have larger specific surface area which results in higher demand of cement paste in cement concrete mix. These particles impede compaction or break during rolling and decrease the strength of the concrete structures. An attempt is made to study the effect of shape of aggregate on quality of the concrete used for the buildings and pavements. Initially an aggregate samples were collected from the stone crusher (two types) and prepared with different proportions of Flakiness and Elongation indices to conduct tests on properties of aggregates and compressive strength and flexural strength tests on concrete. The effect of different percentages from 0 to 50% of combined Flaky and Elongation Aggregates (CFEA) for quality concrete on the compressive and flexural strength of cement concrete is studied. The other properties of aggregate such as bulk density, impact value, water absorption have been studied for different shapes of aggregates. The cost analysis has been carried out with an optimum value of 30% CFEA in 1:3 proportions of flaky and elongated particles.

scholarly journals Inspection of Materials by Laser Based 3D Scanning

2019 ◽  
Vol 9 (2S2) ◽  
pp. 577-579
Keyword(s):  
3D Scanning ◽  
Vital Role ◽  
Scanning System ◽  
Engineering Process ◽  
3D Scanner ◽  
Compact Size ◽  
The Cost ◽  
Production Industry ◽  
World Image

3D Scanning system plays a vital role in the field of engineering as well as for engineering purposes. The 3D Scanner is capable of capturing the real world image and converting it into digitalized form and sends the digitalized form of information to the computer for the further procedures. It aims at the reverse engineering process in a variety of industries like production industry to pertain the existing components for the inspection of quality components and for the simulation engineering to replica the nature from the authentic world. It may also leads to decrease in the manufacturing costs and also it creates much ease for the inspection of the materials. The application of 3D scanning is improved by reducing the cost of 3D scanning device. In this manuscript we dealt with the preparation or making of the 3D scanner system in a compact size with reduced cost in order to be effectively available to everyone and also to amplify the quality of the 3D scanning system.

QBARM: A Queue Theory-Based Adaptive Resource Usage Model

2013 ◽  
Vol 756-759 ◽  
pp. 2523-2527
Author(s):  
Shi Feng Shang ◽  
Jing He Huo ◽  
Zeng Zhang
Keyword(s):  
Cloud Computing ◽  
Allocation Model ◽  
Cloud Computing Environment ◽  
Workflow Execution ◽  
Business Operations ◽  
Efficient Resource ◽  
Cost Efficient ◽  
The Cost ◽  
Adaptive Resource ◽  
Cloud Resources

Workflow is becoming a more and more important tool for business operations, scientific research and engineering. Cloud computing provides an elastic, on-demand and high cost-efficient resource allocation model for workflow executions. During workflow execution, the load will change from time to time and therefore, it becomes an interesting topic to optimize resource utilization of workflows in the cloud computing environment. In this paper, a workflow framework is proposed that can adaptively use cloud resources. In detail, after users specify the desired goal to achieve, the proposed workflow framework then monitors the workflow execution, and utilizes different pricing models to acquire cloud resources according to the change of workflow load. In this way, the cost of workflow execution is reduced. .

Pengaruh Kompetensi Coder terhadap Keakuratan dan Ketepatan Pengkodean Menggunakan ICD 10 di Rumah Sakit X Pekanbaru Tahun 2016

2018 ◽  
Vol 1 (1) ◽  
pp. 31-43
Author(s):  
Nur Maimun ◽  
Jihan Natassa ◽  
Wen Via Trisna ◽  
Yeye Supriatin
Keyword(s):  
Medical Record ◽  
Human Error ◽  
Medical Personnel ◽  
Quality Of Data ◽  
Accuracy And Precision ◽  
Result Show ◽  
Study Implementation ◽  
Icd 10 ◽  
The Cost

The accuracy in administering the diagnosis code was the important matter for medical recorder, quality of data was the most important thing for health information management of medical recorder. This study aims to know the coder competency for accuracy and precision of using ICD 10 at X Hospital in Pekanbaru. This study was a qualitative method with case study implementation from five informan. The result show that medical personnel (doctor) have never received a training about coding, doctors writing that hard and difficult to read, failure for making diagnoses code or procedures, doctor used an usual abbreviations that are not standard, theres still an officer who are not understand about the nomenclature and mastering anatomy phatology, facilities and infrastructure were supported for accuracy and precision of the existing code. The errors of coding always happen because there is a human error. The accuracy and precision in coding very influence against the cost of INA CBGs, medical and the committee did most of the work in the case of severity level III, while medical record had a role in monitoring or evaluation of coding implementation. If there are resumes that is not clearly case mix team check file needed medical record the result the diagnoses or coding for conformity. Keywords: coder competency, accuracy and precision of coding, ICD 10

ABOUT NECESSITY OF MATHEMATICAL MODELING OF THE BUSINESS PROCESS OF COST ESTIMATE CALCULATIONS IN THE CONSTRUCTION OF OIL AND GAS FACILITIES

2017 ◽  
pp. 139-145
Author(s):  
R. I. Hamidullin ◽  
L. B. Senkevich
Keyword(s):  
Mathematical Modeling ◽  
Quality Assessment ◽  
Business Process ◽  
Oil And Gas ◽  
Oil And Gas Industry ◽  
Gas Industry ◽  
Construction Organizations ◽  
The Cost ◽  
Cost Of Construction

A study of the quality of the development of estimate documentation on the cost of construction at all stages of the implementation of large projects in the oil and gas industry is conducted. The main problems that arise in construction organizations are indicated. The analysis of the choice of the perfect methodology of mathematical modeling of the investigated business process for improving the activity of budget calculations, conducting quality assessment of estimates and criteria for automation of design estimates is performed.

Sign in / Sign up

Export Citation Format

Share Document