scholarly journals A Two-Steps-Ahead Estimator for Bubble Entropy

Entropy ◽  
2021 ◽  
Vol 23 (6) ◽  
pp. 761
Author(s):  
George Manis ◽  
Matteo Bodini ◽  
Massimo W. Rivolta ◽  
Roberto Sassi
Keyword(s):  
Statistical Significance ◽  
Conditional Entropy ◽  
Normalization Factor ◽  
Discriminating Power ◽  
Investigation Methods ◽  
Simulated Series ◽  
Hrv Analysis ◽  
Definition Of ◽  
The Cost ◽  
Theoretical Considerations

Aims: Bubble entropy (bEn) is an entropy metric with a limited dependence on parameters. bEn does not directly quantify the conditional entropy of the series, but it assesses the change in entropy of the ordering of portions of its samples of length m, when adding an extra element. The analytical formulation of bEn for autoregressive (AR) processes shows that, for this class of processes, the relation between the first autocorrelation coefficient and bEn changes for odd and even values of m. While this is not an issue, per se, it triggered ideas for further investigation. Methods: Using theoretical considerations on the expected values for AR processes, we examined a two-steps-ahead estimator of bEn, which considered the cost of ordering two additional samples. We first compared it with the original bEn estimator on a simulated series. Then, we tested it on real heart rate variability (HRV) data. Results: The experiments showed that both examined alternatives showed comparable discriminating power. However, for values of 10<m<20, where the statistical significance of the method was increased and improved as m increased, the two-steps-ahead estimator presented slightly higher statistical significance and more regular behavior, even if the dependence on parameter m was still minimal. We also investigated a new normalization factor for bEn, which ensures that bEn=1 when white Gaussian noise (WGN) is given as the input. Conclusions: The research improved our understanding of bubble entropy, in particular in the context of HRV analysis, and we investigated interesting details regarding the definition of the estimator.

Constructing Images of Deviance: A Look at State Intervention into the Problem of Wife-Battery

1983 ◽  
Vol 31 (1_suppl) ◽  
pp. 60-76
Author(s):  
Patricia A. Morgan
Keyword(s):  
Social Problem ◽  
State Intervention ◽  
The United States ◽  
The State ◽  
Structural Position ◽  
Wife Battering ◽  
The Social ◽  
Class Context ◽  
Definition Of ◽  
The Cost

Patricia Morgan's paper describes what happens when the state intervenes in the social problem of wife-battering. Her analysis refers to the United States, but there are clear implications for other countries, including Britain. The author argues that the state, through its social problem apparatus, manages the image of the problem by a process of bureaucratization, professionalization and individualization. This serves to narrow the definition of the problem, and to depoliticize it by removing it from its class context and viewing it in terms of individual pathology rather than structure. Thus refuges were initially run by small feminist collectives which had a dual objective of providing a service and promoting among the women an understanding of their structural position in society. The need for funds forced the groups to turn to the state for financial aid. This was given, but at the cost to the refuges of losing their political aims. Many refuges became larger, much more service-orientated and more diversified in providing therapy for the batterers and dealing with other problems such as alcoholism and drug abuse. This transformed not only the refuges but also the image of the problem of wife-battering.

scholarly journals HRV analysis: undependability of approximate entropy at locating optimum complexity in malnourished children

2021 ◽  
pp. 1-6
Author(s):  
David M. Garner ◽  
Gláucia S. Barreto ◽  
Vitor E. Valenti ◽  
Franciele M. Vanderlei ◽  
Andrey A. Porto ◽  
...  
Keyword(s):  
Statistical Significance ◽  
Accurate Determination ◽  
Approximate Entropy ◽  
Effect Sizes ◽  
Potential Hazard ◽  
Autonomic Modulation ◽  
Embedding Dimension ◽  
Malnourished Children ◽  
Hrv Analysis

Abstract Introduction: Approximate Entropy is an extensively enforced metric to evaluate chaotic responses and irregularities of RR intervals sourced from an eletrocardiogram. However, to estimate their responses, it has one major problem – the accurate determination of tolerances and embedding dimensions. So, we aimed to overt this potential hazard by calculating numerous alternatives to detect their optimality in malnourished children. Materials and methods: We evaluated 70 subjects split equally: malnourished children and controls. To estimate autonomic modulation, the heart rate was measured lacking any physical, sensory or pharmacologic stimuli. In the time series attained, Approximate Entropy was computed for tolerance (0.1→0.5 in intervals of 0.1) and embedding dimension (1→5 in intervals of 1) and the statistical significances between the groups by their Cohen’s ds and Hedges’s gs were totalled. Results: The uppermost value of statistical significance accomplished for the effect sizes for any of the combinations was −0.2897 (Cohen’s ds) and −0.2865 (Hedges’s gs). This was achieved with embedding dimension = 5 and tolerance = 0.3. Conclusions: Approximate Entropy was able to identify a reduction in chaotic response via malnourished children. The best values of embedding dimension and tolerance of the Approximate Entropy to identify malnourished children were, respectively, embedding dimension = 5 and embedding tolerance = 0.3. Nevertheless, Approximate Entropy is still an unreliable mathematical marker to regulate this.

scholarly journals Application Of The Work Breakdown Structure In Determining Cost Buffers In Construction Schedules

2015 ◽  
Vol 61 (1) ◽  
pp. 147-161 ◽  
Author(s):  
M. Połoński
Keyword(s):  
Construction Projects ◽  
Work Breakdown Structure ◽  
Initial Task ◽  
The Common ◽  
Definition Of ◽  
The Cost ◽  
Construction Schedules

AbstractThe paper presents methods of determining the location of cost buffers and corresponding contingency costs in the CPM schedule based on its work breakdown structure. Application of correctly located cost buffers with appropriately established reserve costs is justified by the common overrunning of scheduled costs in construction projects. Interpolated cost buffers (CB) as separate tasks have been combined with relevant summary tasks by the start–to–start (SS) relationship, whereas the time of their execution has been dynamically connected with the time of accomplishment of particular summary tasks using the “paste connection” option. Besides cost buffers linked with the group of tasks assigned to summary tasks, a definition of the cost buffer for the entire project (PCB) has been proposed, i.e. as one initial task of the entire project. Contingency costs corresponding to these buffers, depending on the data that the planner has at his disposal, can be determined using different methods, but always depend on the costs of all tasks protected by each buffer. The paper presents an exemplary schedule for a facility and the method of determining locations and cost for buffers CB and PCB, as well as their influence on the course of the curve illustrating the budgeted cost of work scheduled (BCWS). The proposed solution has been adjusted and presented with consideration of the possibilities created by the scheduling software MS Project, though its general assumptions may be implemented with application of other similar specialist tools.

Analisis Pembiayaan Dana Talangan Haji untuk  Biaya Perjalan Ibadah Haji

2018 ◽  
Vol 1 (2) ◽  
pp. 228-244
Author(s):  
Asmawarna Sinaga ◽  
Anjur Perkasa Alam ◽  
Fariz Arkan ◽  
Sri Wahyuni Hasibuan
Keyword(s):  
Islamic Law ◽  
Field Research ◽  
Interactive Methods ◽  
Islamic Banks ◽  
Data Presentation ◽  
Analysis Techniques ◽  
Collection Data ◽  
Definition Of ◽  
The Cost

  Analysis of the amount of financing the hajj bailout for the cost of the pilgrimage (Case Study of Bank Sumut Syariah Sub-Branch Stabat).Asmawarna Sinaga and Anjur Perkasa Alam. Hajj financing is a loan from a sharia bank to customers to cover the shortage of funds to obtain a seat (seat) Hajj at the time of repayment BPIH (Hajj Travel Expenses). This financing product uses the Qardh Wal Ijarah principle. The purpose of this research is to know the view of Islamic law against financing of Hajj bailout fund and to know the view of Islamic law about ujrah fee on akad of bailout fund of Hajj. This research is field research. The definition of the Hajj bailout is a bailout fund from a bank to a special customer to cover kekurangandana to cover the lack of funds to obtain a portion number at the time to pay the cost of organizing the pilgrimage. The research design uses a qualitative approach with non-statistical analysis While the data analysis techniques use content analysis and interactive methods consisting of data reduction, data collection, data presentation and conclusion. The results of this study note that the akad bailout funds in Islamic banks contain multi-akad, where the contract used qardh and ijarah is allowed. While the view of Islamic law regarding the taking of ujrah fee on hajj bailout fund is not in accordance with sharia due to the percentage of ujrah fee based on qardh fund.

Influence of inter-organizational relations on methods of calculating the cost of production of agricultural organizations

2020 ◽  
pp. 13-20 ◽  
Author(s):  
Anastasiya Alekseevna Romanova
Keyword(s):  
Theoretical Analysis ◽  
Cost Calculation ◽  
Interorganizational Cooperation ◽  
Organizational Relations ◽  
Interorganizational Management ◽  
Calculation System ◽  
Analytical System ◽  
Definition Of ◽  
The Cost ◽  
Organizational Cooperation

The author’s definition of inter-organizational cooperation, interorganizational management accounting and inter-organizational accounting and analytical system and cost calculation system in the framework of inter-organizational relations is given in the article on the basis of theoretical analysis. The features of calculating the cost of interorganizational cooperation are defined, new accounting practices are described, the advantages of implementing this type of accounting are identified, and possible problem areas are identified.

ProQuest Historical Newspapers: Leftist Newspapers and Periodicals

2021 ◽  
Vol 23 (2) ◽  
pp. 34-37
Author(s):  
Thomas J. Beck
Keyword(s):  
Twentieth Century ◽  
Price Information ◽  
Social Democrats ◽  
Search Function ◽  
Advanced Search ◽  
Definition Of ◽  
The Cost ◽  
Pdf Format ◽  
Database Content ◽  
Insight Into

ProQuest Historical Newspapers: Leftist Newspapers and Periodicals is a source for leftist publications (mostly newspapers), largely published in the twentieth century. Here, the user can access articles in PDF format from 156 national and international publications. Navigating this database and the documents therein can be easily done, but articles cannot be magnified or reduced, which may prove problematic with PDFs of old newspapers. Database content can be found through browsing or by using a basic and/or advanced search. The browse and basic search options here are understandable, but the advanced search is not self-explanatory and can possibly confuse the user. As a consequence, a new user of this database will probably benefit from instruction in its use from either the vendor or someone else familiar with this resource. However, when this search function is used properly it can produce numerous, on-point results for any query. The same is true of the basic search and browsing features, though they tend to produce larger lists of results that are less on-point than the advanced search. The vendor did not provide specific price information for this review, only indicating that pricing is determined by an institution's size and number of users. As this provides potential subscribers with very little insight into the cost of acquiring this resource, its advised that they contact ProQuest for a price quote tailored to their own institution. Its licensing agreement is the same as those used for all ProQuest databases and is average in its composition (though somewhat longer than average). The quality and quantity of content in this resource is notable, and it will certainly be of use to those looking for articles from leftist newspapers and periodicals. However, the definition of “leftist” here may be problematic for some users! Communist and Socialist publications are certainly available in this database, but those for Anarchists, Social Democrats, and other leftists are not.

Recurrent Instability after Arthroscopic Glenoid Labral Repair with a Minimum of Three Points of Fixation: Do the Number of Anchors or Fixation Points Correlate to Outcomes?

2021 ◽  
Author(s):  
Sean Mc Millan ◽  
Brian Fliegel ◽  
Michael Stark ◽  
Elizabeth Ford ◽  
Manuel Pontes ◽  
...  
Keyword(s):  
Shoulder Instability ◽  
Statistical Significance ◽  
Labral Repair ◽  
Secondary Outcome ◽  
Consecutive Series ◽  
Recurrent Instability ◽  
Significant Difference ◽  
Fixation Points ◽  
Definition Of ◽  
Shoulder Score

Introduction: The goal of this study was to evaluate the recurrence rate of instability following arthroscopic Bankart repairs in regard to the number and types of fixation utilized. A Bankart lesion is a tear in the anteroinferior capsulolabral complex within the shoulder, occurring in association with an anterior shoulder dislocation. These injuries can result in glenoid bone loss, decreased range of motion, and recurrent shoulder instability. Successful repair of these lesions has been reported in the literature with repair constructs that have three points of fixation. However, the definition of “one point of fixation” is yet to be fully elucidated. Materials and Methods: A consecutive series of arthroscopically repaired Bankart lesions were evaluated pertaining to the points of fixation required to achieve shoulder stability. This included the number, position, and types of anchors used. Patients consented to complete a series of surveys at a minimum of two years postoperatively. The primary outcome was to determine recurrent instability via the UCLA Shoulder Score, the ROWE Shoulder Instability Score, and the Oxford Shoulder Score. A secondary outcome included pain on a Visual Analog Scale (VAS). Results: There were 116 patients reviewed, 46 patients achieved three points of fixation in their surgical repair via two anchors and 70 patients achieved a similar fixation with three or more anchors. There was no significant difference in the mean age, gender, or body mass index (BMI). Patients receiving two anchors demonstrated recurrent instability 8.7% of the time (4 of 46 patients). Patients who received three or more anchors demonstrated recurrent instability 8.6% of the time (6 of 70 patients). Overall, there was no statistical significance between the number/types of anchors used. Between the two cohorts, there was no statistically significant difference found between VAS, ROWE, UCLA, and Oxford Scores. There was a significant difference in pain reported on the VAS scale with an average VAS score of 0.43 versus 2.5 in those without and with recurrent instability respectively. Conclusion: Contention still exists surrounding the exact definition of “a point of fixation” in arthroscopic Bankart repairs. Three-point constructs can be created through a variety of combinations including anchors and sutures, ultimately achieving the goal of a stable shoulder.

Plan, Projection, Policy—Mathematical Programming and Planning Theory

1974 ◽  
Vol 6 (4) ◽  
pp. 419-429 ◽  
Author(s):  
L D Hopkins
Keyword(s):  
Optimal Choice ◽  
Planning Theory ◽  
Public Agency ◽  
Indirect Determination ◽  
Mathematical Programs ◽  
Planning Models ◽  
Definition Of ◽  
The Individual ◽  
The Cost ◽  
Programming Analysis

The purpose of planning models is to help determine how best to change the controllable variables of a system so that the system will move toward desired goals. In the case of public planning, the welfare criterion or planning objective is not likely to be the same as the objective function driving the behavior of the individual elements of the system. A rigorous definition of a theory of planning is provided through extensions to the linear-programming analysis of the decentralized firm in order to handle (1) the distinction between the planning objectives and behavioral objectives, and (2) the indirect determination of prices by a public agency through policies which modify existing prices sufficiently to achieve a prescribed allocation of resources. A set of three related mathematical programs is identified which yield respectively a target plan, a projection, and an optimal choice of policies. A combination of these programs defines the best solution in terms of the value of the target plan minus the cost of altering the system to achieve that target.

scholarly journals ESTIMATION OF VEHICLE OPERATING TIME TAKING INTO ACCOUNT THE INFLUENCE OF A NUMBER OF FACTORS

2021 ◽  
Vol 1 (37) ◽  
pp. 76-85
Author(s):  
A. Krasheninin
Keyword(s):  
Service Life ◽  
Operating Time ◽  
Material Resources ◽  
Number Of Factors ◽  
Additional Costs ◽  
Definition Of ◽  
Optimal Average ◽  
The Cost ◽  
The Impact ◽  
Standard Service

Modern vehicles operated on the railways of Ukraine have almost exhausted or exceeded their resource. The overuse of financial and material resources for their maintenance continues. The standard service life of vehicles was calculated on stable economic conditions of use of vehicles and their timely updating in process of aging. The service life of modern vehicles is determined by the influence of many factors, the disregard of which can lead to significant costs, even in compliance with the standard service life. For railway transport, these factors need modern clarification, as in operation their service life often exceeds the standard or, as for intermodal transport, the service life does not have a strict justification. Accordingly, the article analyzes the issues of assessing the impact on the service life of vehicles of the components of the cost of its maintenance and average daily mileage. It is shown that, firstly, the definition of the service life of vehicles must be linked to the cost of vehicle development, its creation, testing and production, the cost of operation and storage, as well as additional costs, and secondly , with the optimal average daily mileage, at which all the costs are minimal.

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