Comparing the Predictive Ability of T-Method and Cobb-Douglas Production Function for Warranty Data

2009 ◽  
Author(s):  
Protyusha DasNeogi ◽  
Elizabeth Cudney ◽  
Akim Adekpedjou ◽  
Rodney Kestle
Keyword(s):  
Production Function ◽  
Signal To Noise Ratio ◽  
High Reliability ◽  
Market Competition ◽  
Predictive Ability ◽  
True Value ◽  
Quality Of Products ◽  
Relationship Of ◽  
The Relationship ◽  
Douglas Production Function

Predictive models are used in an attempt to anticipate future transitions, mitigate losses, and maximize economic gains. In today’s market, companies look for high reliability and quality of products due to great market competition. Hence warranty data is of considerable interest to companies. Warranty shows the ability of a system or component to perform its functions within a given customer usage. Many statistical and data mining methods are available to predict the warranty data. This study focuses on analyzing the predictive efficiency of the T-method and Cobb-Douglas production function on warranty data by comparing their prediction capability. The T-method, developed by Genichi Taguchi, is founded upon the fundamentals of the Taguchi System of Quality Engineering which is used to calculate an overall prediction based on signal-to-noise ratio. Using this method, the required parameters are calculated to obtain an overall estimate of the true value of the output for each signal member. The Cobb-Douglas production function is then applied on the same dataset. In economics, the Cobb-Douglas functional form of production function is widely used to represent the relationship of the output to inputs. The strength of the relationship is then assessed using the R-squared and adjusted R-squared values.

The Fairbanks earthquakes of June 21, 1967; aftershock distribution, focal mechanisms, and crustal parameters

1969 ◽  
Vol 59 (1) ◽  
pp. 73-100
Author(s):  
Larry Gedney ◽  
Eduard Berg
Keyword(s):  
P Wave ◽  
Fault System ◽  
Crustal Layer ◽  
Near Surface ◽  
Fault Surface ◽  
True Value ◽  
Regional Tectonic ◽  
Tectonic System ◽  
Relationship Of ◽  
The Relationship

Abstract A series of moderately severe earthquakes occurred in the vicinity of Fairbanks, Alaska, on the morning of June 21, 1967. During the following months, many thousands of aftershocks were recorded in order to outline the aftershock zone and to resolve the focal mechanism and its relation to the regional tectonic system. No fault is visible at the surface in this area. Foci were found to occupy a relatively small volume in the shape of an ablate cylinder tilted about 30° from the vertical. The center of the zone lay about 12 kilometers southeast of Fairbanks. Focal depths ranged from near-surface to 25 kilometers, although most were in the range 9-16 km. In the course of the investigation, it was found that the Jeffreys and Bullen velocity of 5.56 km/sec for the P wave in the upper crustal layer is very near the true value for this arec, and that the use of 1.69 for the Vp/Vs ratio gives good results in most cases. The proposed faulting mechanism involves nearly equal components of right-lateral strike slip, and normal faulting with northeast side downthrown on a system of sub-parallel faults striking N40°W. The fault surface appears to be curved—dipping from near vertical close to the surface to less steep northeast dips at greater depths. The relationship of this fault system with the grosser aspects of regional tectonism is not clear.

scholarly journals Anthropometric indices obesity and cardiometabolic risk: is there a link?

2021 ◽  
Vol 20 (4) ◽  
pp. 2746
Author(s):  
A. V. Svarovskaya ◽  
A. A. Garganeeva
Keyword(s):  
Cardiometabolic Risk ◽  
Predictive Ability ◽  
Dietary Lipids ◽  
The Body ◽  
Prognostic Models ◽  
Metabolic Phenotype ◽  
Visceral Adiposity Index ◽  
Obesity Indices ◽  
Relationship Of ◽  
The Relationship

Adipose tissue is currently regarded as a key organ for excess dietary lipids, which determine whether the body will maintain normal homeostasis or whether inflammation and insulin resistance will develop. In recent years, there is more information about novel prognostic models — the visceral adiposity index and the lipid accumulation product. The aim of this review was to analyze the results of studies examining the relationship between various indices of obesity and cardiometabolic risk. We analyzed 105 literature sources, 53 of which were ruled out, becausethe processes of interest were not described in detail or included anassessment of the relationship of various obesity indices with metabolic parameters. The results obtained indicate the advisability of using novel obesity indices, which have a good predictive ability and are simple and convenient to use. It is necessary to use additional methods of anthropometric and clinical examination in order to assess the metabolic phenotype of obesity, which will make it possible to stratify patients by the level of cardiometabolic risk.

Research on the Frequency Spectrum Management Method of VLF Based on the Propagation Prediction Technology

2014 ◽  
Vol 543-547 ◽  
pp. 2180-2183 ◽  
Author(s):  
Jian Ping Zhou ◽  
Guang Ming Li
Keyword(s):  
Signal To Noise Ratio ◽  
Effective Means ◽  
Spectrum Management ◽  
Predicting Model ◽  
Atmospheric Noise ◽  
Communication Frequency ◽  
Propagation Prediction ◽  
Noise Statistics ◽  
Relationship Of ◽  
The Relationship

VLF communication is one of the most effective means to command underwater platform. The spectrum resource of vlf communication is limited, so it is very important for enhance the reliability of vlf communication to strengthen the vlf communication spectrum management. It makes use of the well prediction of the vlf frequency band, to establish the signal field predicting model and atmospheric noise statistics predicting model respectively, predicts the field of signal and noise level, and then calculated the signal-to-noise ratio (SNR). According to the SNR distribution we can determine the relationship of the optimal communication frequency, time and location of receiver. So the efficiency of spectrum management for vlf communication can be enhanced.

scholarly journals Unraveling the relationship of loneliness and isolation in schizophrenia: Polygenic dissection and causal inference

2020 ◽  
Author(s):  
A. Andreu-Bernabeu ◽  
C.M. Díaz-Caneja ◽  
J. Costas ◽  
L. de Hoyos ◽  
C. Stella ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Control Sample ◽  
Predictive Ability ◽  
Obsessive Compulsive ◽  
Correlation Pattern ◽  
Independent Case ◽  
Obsessive Compulsive Disorders ◽  
Relationship Of ◽  
The Relationship ◽  
Compulsive Disorders

ABSTRACTThere is increasing recognition of the association between loneliness and social isolation (LNL-ISO) with schizophrenia. Here, we demonstrate significant LNL-ISO polygenic score prediction on schizophrenia in an independent case-control sample (N=3,488). We then dissect schizophrenia predisposing variation into subsets of variants based on their effect on LNL-ISO. Genetic variation with concordant effects in both phenotypes show significant SNP-based heritability enrichment, higher polygenic predictive ability in females and positive covariance with other mental disorders such as depression, anxiety, attention-deficit hyperactivity, alcohol use disorder, and autism. Conversely, genetic variation with discordant effects is only predictive in males and negatively correlated with those disorders. This correlation pattern is not observed for bipolar and obsessive-compulsive disorders. Mendelian randomization analyses demonstrate a plausible bi-directional causal relationship between LNL-ISO and schizophrenia, with a greater effect of LNL-ISO liability on schizophrenia. These results illustrate the genetic footprint of LNL-ISO on schizophrenia and suggest its role as a potential target for early intervention.

scholarly journals The moderating effect of corporate governance to the relationship of corporate social responsibility and product market competition to company value

2021 ◽  
Vol 24 ◽  
pp. 317-323
Author(s):  
Elyzabet Indrawati Marpaung ◽  
Yvonne Augustine
Keyword(s):  
Corporate Governance ◽  
Corporate Social Responsibility ◽  
Social Responsibility ◽  
Market Competition ◽  
Product Market ◽  
Product Market Competition ◽  
Company Value ◽  
Corporate Social ◽  
Relationship Of ◽  
The Relationship

The objective of this research is to find out the moderating effect of corporate governance on the relationship of corporate social responsibility and product market competition to company value. The control variable in this study is company size. The sample of this study was 216 observations consisting of 54 manufacturing companies listed in the Indonesia Stock Exchange from 2016 until 2019. Moreover, the simple random sampling method is employed to grab them. To analyze the data, we use the multiple regression model with polling data. The findings of this research are product market competition negatively affects company value. In opposition, corporate social responsibility and  corporate governance positively affect company value. Meanwhile, corporate governance only moderates the effect of product market competition on the company value. The implication of this study is that good corporate governance practices can reduce the negative effects of PMC on company value.    

A Note on the Relationship among the Shape of the Production Possibility Frontier, ‘Returns to Scale’ and ‘Returns to Factors’ under Cobb–Douglas Production Function

2016 ◽  
Vol 4 (2) ◽  
pp. 173-184 ◽  
Author(s):  
Merter Mert
Keyword(s):  
Production Function ◽  
Economies Of Scale ◽  
Returns To Scale ◽  
Scale Economies ◽  
Production Possibility ◽  
Production Possibility Frontier ◽  
The Relationship ◽  
Douglas Production Function

The purpose of this study is to examine relationship among returns to scale, returns to factors and the shape of the production possibility frontier under Cobb–Douglas production function. The study asks the following question: How can production possibility frontier be drawn (a) if returns to scale are constant, increasing and decreasing and (b) if returns to factors are constant, increasing and decreasing? The main finding of the study is as follows: When (a) returns to factors are constant or increasing or decreasing and (b) returns to scale (economies of scale internal to the firm) are constant or increasing or decreasing, the production possibility frontier can be bowed in or bowed out or be linear under certain conditions.

ASSESSMENT OF THE ACOUSTICS OF TEMPLE BUILDINGS AND STRUCTURES BASED ON THE PARAMETER MEASURE OF HEIGHT

2021 ◽  
Vol 97 (5) ◽  
pp. 115-121
Author(s):  
Ch.A. Ch.A. SCHIRJETSKY1
Keyword(s):  
Signal To Noise Ratio ◽  
Objective Assessment ◽  
Signal To Noise ◽  
Field Surveys ◽  
Noise Ratio ◽  
Relationship Of ◽  
Specific Sense ◽  
The Relationship ◽  
The Temple ◽  
The Church

In this paper, based on the analysis of the results of field surveys of the acoustics of canonical prayer halls of the Orthodox and Muslim confessions, a proposal for an objective assessment of the specific sense of sacredness of religious events is developed. A new parameter for assessing this feeling is presented-the so - called "height measure" of the perception of the sound of the temple, with the method of its calculation and measurement. The relationship of this parameter with the known volume criteria of echo formations is estimated, depending on the geometry of the church (first of all, on the height of the main dome) and the signal-to-noise ratio for the characteristic areas of the parishioners 'accommodation.

Effect of Mean Wind Speed Variations on Power Generation of Wind Farm

2012 ◽  
Vol 215-216 ◽  
pp. 1298-1307
Author(s):  
Chen Guo ◽  
Yan He
Keyword(s):  
Power Generation ◽  
Wind Speed ◽  
Wind Farm ◽  
High Reliability ◽  
Wind Farms ◽  
Measured Data ◽  
Data Sets ◽  
Mean Wind Speed ◽  
Relationship Of ◽  
The Relationship

Through two methods, wind speed data sets sequence, the elements of which increased in Mean Wind Speed (MWS) orderly, are introduced first, and a numerical integration method depending on Weibull fitting result and power curve data to calculate Power Generation (PG) is proposed in this paper. Then, with measured data of 3 wind farms, PG with different heights are calculated and contrastive studies are made, employing the proposed data sets processing and PG calculating methods. Research results indicate that the PG calculating method has high reliability, and Equivalent Available Duration (EAD) increases about 50-60h when MWS increased by 0.1m/s. The results provide important basis for studies on the relationship of PG variation and measured data correction methods.

scholarly journals Relationship Workloads with Work Satisfactionlabor Contract on The Tomkins Shoes Company

2020 ◽  
Vol 4 (1) ◽  
pp. 6-14
Author(s):  
R. Rina Novianty Ariawaty ◽  
Siti Noni Evita
Keyword(s):  
Job Satisfaction ◽  
Market Competition ◽  
Rank Correlation ◽  
Global Market ◽  
Spearman Rank Correlation ◽  
Contract Workers ◽  
Relationship Of ◽  
Contract Labor ◽  
The Relationship ◽  
Descriptive Method

In facing global market competition, every company has different production standards. To meet work targets, the company imposes work on both low and high workloads. The workload was allegedly able to affect the satisfaction felt by the workforce. This study aims to determine the relationship of workload with contract labor satisfaction. The method used in this research uses the descriptive method by taking a sample of 86 contract workers. Analyze the correlation between variables, namely workload and job satisfaction, using the Spearman Rank Correlation formula. The results of this study indicate that there is a relationship between workload and job satisfaction of contract workers found that there is a relationship with a percentage of 21.6%.  

Sign in / Sign up

Export Citation Format

Share Document