scholarly journals Using community photography to investigate phenology: A case study of coat molt in the mountain goat ( Oreamnos americanus ) with missing data

2020 ◽  
Vol 10 (23) ◽  
pp. 13488-13499
Author(s):  
Katarzyna Nowak ◽  
Joel Berger ◽  
Amy Panikowski ◽  
Donald G. Reid ◽  
Aerin L. Jacob ◽  
...  
2020 ◽  
Author(s):  
Katarzyna Nowak ◽  
Shane Richards ◽  
Amy Panikowski ◽  
Donald Reid ◽  
Aerin Jacob ◽  
...  

2003 ◽  
Vol 1836 (1) ◽  
pp. 132-142 ◽  
Author(s):  
Brian L. Smith ◽  
William T. Scherer ◽  
James H. Conklin

Many states have implemented large-scale transportation management systems to improve mobility in urban areas. These systems are highly prone to missing and erroneous data, which results in drastically reduced data sets for analysis and real-time operations. Imputation is the practice of filling in missing data with estimated values. Currently, the transportation industry generally does not use imputation as a means for handling missing data. Other disciplines have recognized the importance of addressing missing data and, as a result, methods and software for imputing missing data are becoming widely available. The feasibility and applicability of imputing missing traffic data are addressed, and a preliminary analysis of several heuristic and statistical imputation techniques is performed. Preliminary results produced excellent performance in the case study and indicate that the statistical techniques are more accurate while maintaining the natural characteristics of the data.


Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1691
Author(s):  
Nikesh Patel ◽  
Kavitha Sivanathan ◽  
Prashant Mhaskar

This paper addresses the problem of quality modeling in polymethyl methacrylate (PMMA) production. The key challenge is handling the large amounts of missing quality measurements in each batch due to the time and cost sensitive nature of the measurements. To this end, a missing data subspace algorithm that adapts nonlinear iterative partial least squares (NIPALS) algorithms from both partial least squares (PLS) and principal component analysis (PCA) is utilized to build a data driven dynamic model. The use of NIPALS algorithms allows for the correlation structure of the input–output data to minimize the impact of the large amounts of missing quality measurements. These techniques are utilized in a simulated case study to successfully model the PMMA process in particular, and demonstrate the efficacy of the algorithm to handle the quality prediction problem in general.


2019 ◽  
Vol 96 ◽  
pp. 297-308 ◽  
Author(s):  
Iman Azimi ◽  
Tapio Pahikkala ◽  
Amir M. Rahmani ◽  
Hannakaisa Niela-Vilén ◽  
Anna Axelin ◽  
...  

1934 ◽  
Vol 10 (5) ◽  
pp. 527-531
Author(s):  
W. E. Swales

An oxyurid nematode of the genus Skrjabinema Wereschtschagin, 1926 is recorded from the Columbian mountain goat and mountain caribou in Canada. This parasite is the first Canadian and second North American record for the genus and is described as a new species. A key to the species of Skrjabinema is included.


Mammalia ◽  
2016 ◽  
Vol 80 (4) ◽  
Author(s):  
Samuel I. Zeveloff ◽  
Christopher R. Schulze

AbstractWe report the unprecedented occurrence of the virtually complete loss of cheek teeth on the cranium of an adult male mountain goat (


1969 ◽  
Vol 47 (1) ◽  
pp. 5-8 ◽  
Author(s):  
B. H. Lauer ◽  
D. A. Blood ◽  
A. M. Pearson ◽  
B. E. Baker

Milk was obtained from a mountain goat that was killed near Haines Junction, Yukon, and from another that was killed near Taseko Lake, B.C. The gross composition of the milks and the fatty acid constitution of the milk fats were determined.


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