Nabks and Acacias Plants Existences in the Valleys and Plain Lands and their Proportional Rates' Existences in Every 400 M

2009 ◽  
Author(s):  
Zaher Saif Alhshami
Keyword(s):  
Proportional Rates

Analysis of Risk Factors for Psoriasis Recurrence Using Proportional Rates Model

2014 ◽  
Vol 1 (3) ◽  
Author(s):  
Parvin Mansouri ◽  
Ebrahim Hajizadeh ◽  
Freshteh Osmani
Keyword(s):  
Risk Factors ◽  
Proportional Rates

An alternative approach to relapse analysis: Using Monte Carlo methods and proportional rates of response

2018 ◽  
Vol 111 (2) ◽  
pp. 289-308 ◽  
Author(s):  
Jonathan E. Friedel ◽  
Ann Galizio ◽  
Meredith S. Berry ◽  
Mary M. Sweeney ◽  
Amy L. Odum
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Methods ◽  
Alternative Approach ◽  
Proportional Rates

A new approach to the mathematical formulation of lactation curves

1989 ◽  
Vol 49 (2) ◽  
pp. 151-162 ◽  
Author(s):  
S. V. Morant ◽  
A. Gnanasakthy
Keyword(s):  
Experimental Data ◽  
Milk Yield ◽  
Milk Fat ◽  
Mathematical Formulation ◽  
Second Derivative ◽  
New Approach ◽  
Rates Of Change ◽  
Lack Of Fit ◽  
Horizontal Asymptote ◽  
Proportional Rates

ABSTRACTSix alternative lactation curves were derived by considering the proportional rates of change in milk yield during lactation. Experimental data showed that rates of change do not necessarily fall to a constant value in mid and late lactation. This accounts for the systematic lack of fit reported by several authors using the derivative of the incomplete gamma function, whose second derivative has a horizontal asymptote. Curves whose derivatives are not restricted in this way described patterns of milk yield in first to third lactation animals more closely. Some statistical properties of their parameters have been examined. The curve loge (y) = a - bt'(1 + kt') + ct'2 + d/t, where t is days since calving, t' = t – 150, A: is a constnat and a, b, c and d are parameters to be estimated, is recommended. This curve was also fitted to yields of milk fat, protein and lactose.

scholarly journals Behavior of Business Investment in the USA Under Variable and Proportional Rates of Replacement

2017 ◽  
Author(s):  
Georgios (George) C. Bitros ◽  
M. Ishaq Nadiri
Keyword(s):  
Business Investment ◽  
The Usa ◽  
Proportional Rates

scholarly journals Semiparametric estimation of the proportional rates model for recurrent events data with missing event category

2021 ◽  
pp. 096228022110239
Author(s):  
Feng-Chang Lin ◽  
Jianwen Cai ◽  
Jason P Fine ◽  
Elisabeth P Dellon ◽  
Charles R Esther
Keyword(s):  
Recurrent Events ◽  
Case Analysis ◽  
Recurrent Event ◽  
Complete Case Analysis ◽  
Recurrent Event Data ◽  
Event Type ◽  
Complete Case ◽  
Semiparametric Method ◽  
Proportional Rates ◽  
Improved Performance

Proportional rates models are frequently used for the analysis of recurrent event data with multiple event categories. When some of the event categories are missing, a conventional approach is to either exclude the missing data for a complete-case analysis or employ a parametric model for the missing event type. It is well known that the complete-case analysis is inconsistent when the missingness depends on covariates, and the parametric approach may incur bias when the model is misspecified. In this paper, we aim to provide a more robust approach using a rate proportion method for the imputation of missing event types. We show that the log-odds of the event type can be written as a semiparametric generalized linear model, facilitating a theoretically justified estimation framework. Comprehensive simulation studies were conducted demonstrating the improved performance of the semiparametric method over parametric procedures. Multiple types of Pseudomonas aeruginosa infections of young cystic fibrosis patients were analyzed to demonstrate the feasibility of our proposed approach.

scholarly journals Degradation of the nucleic acids in mixed rumen bacteria on incubation with different media

1977 ◽  
Vol 37 (3) ◽  
pp. 389-394 ◽  
Author(s):  
R. C. Smith ◽  
R. H. Smith
Keyword(s):  
Carbon Dioxide ◽  
Nucleic Acids ◽  
Rumen Bacteria ◽  
Free Medium ◽  
Slow Speed ◽  
Other Information ◽  
Proportional Rates ◽  
Turn Over ◽  
Free Media

1. Mixed rumen bacteria were grown in vitro in a medium containing [U-14C]adenine. Radioactivity was incorporated into the purine bases of the nucleic acids.2. Labelled bacteria were incubated with a nitrogen-deficient cell-free medium (medium A), a protozoa-free supernatant suspension from a slow-speed centrifuging of a steer's rumen contents (medium B) and whole rumen contents of a steer (medium C). Mean (six experiments) proportional rates of release of radioactivity(/h) were significantly greater for medium A (0.140) than for media B or C (0.055 and 0.043 respectively). Some of the radioactivity accumulated in the cell-free media; some was lost, partially as carbon dioxide.3. Calculation from this and other information indicated that about 30% of bacterial nucleic acids may turn over in the rumen even in the absence of protozoa.

scholarly journals Regression analysis of incomplete data from event history studies with the proportional rates model

2018 ◽  
Vol 11 (1) ◽  
pp. 91-97 ◽  
Author(s):  
Guanglei Yu ◽  
Liang Zhu ◽  
Jianguo Sun ◽  
Leslie L. Robison
Keyword(s):  
Regression Analysis ◽  
Incomplete Data ◽  
Event History ◽  
Proportional Rates
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