1,720,974 research outputs found
Influences of various factors on cows’ entrance order into the milking parlour
No full textThis study investigates the stability of the milking order of cows entering into the milking parlour of a commercial dairy herd, and changes to this order consequent to a change in health status and a change in the membership of the group of cows being milked. In large herds it is difficult for stockmen to monitor all cows closely. If changes in the milking order are indicative of health or other problems, the monitoring of any changes in the order could alert stockmen to such problems. This could therefore be a tool to add to the parameters collected routinely in precision livestock farming (PLF). The milking process of 692 cows, in seven different feeding groups, over a period of six months, was monitored. The milking order was found to be stable within days, and across days, but was more variable within milking sessions. Cows with mastitis (P < 0.001) entered the parlour later than when they were healthy. Cows with metritis entered into the milking parlour earlier than usually(P < 0.05). When new cows entered a group they fitted into a stable position within the parlour entrance order within two days. There were no effects found of parity, age, days in milk, milk production or milking duration on the milking order. It is concluded that theregular monitoring of milking order, and flagging of changes in this order could be a useful tool in the early identification of the presence of disease in cow
Relationships between milk coagulation property traits analyzed with different methodologies
No full textMilk coagulation properties (MCP) analysis is performed
using a wide range of methodologies in different
countries and laboratories, using different instruments,
coagulant activity in the milk, and type of coagulant.
This makes it difficult to compare results and data
from different research. The aims of this study were to
propose a method for the transformation of values of
rennet coagulation time (RCT) and curd firmness (a30)
and to predict the noncoagulation (NC) probability of
milk samples analyzed using different methodologies.
Individual milk samples were collected during the
morning milking in October 2010 from each of 165
Holstein-Friesian dairy cows in 2 freestall barns in Italy,
and sent to 3 laboratories for MCP analysis. For each
laboratory, MCP analysis was performed using a different
methodology: A, with a computerized renneting
meter instrument using 0.051 international milk clotting
units (IMCU)/mL of coagulant activity; B, with
a Lattodinamografo (Foss-Italia, Padova, Italy) using
0.051 IMCU/mL of coagulant activity; and C, with an
Optigraph (Ysebaert, Frépillon, France) using 0.120
IMCU/mL of coagulant activity. The relationships
between MCP traits were analyzed with correlation
and regression analyses for each pair of methodologies.
For each MCP trait, 2 regression models were applied:
model 1 was a single regression model, where the dependent
and independent variables were the same MCP
trait determined by 2 different methodologies; in model
2, both a30 and RCT were included as independent variables.
The NC probabilities for laboratories with the
highest number of NC samples were predicted based on
the RCT and a30 values measured in the laboratories
with lower number of NC samples using logistic regression
and receiver operating characteristic analysis. The
percentages of NC samples were 4.2, 11.5, and 0.6% for
A, B, and C, respectively. The transformation of MCP
traits was more precise with model 1 for RCT (R2:
0.77–0.82) than for a30 (R2: 0.28–0.63). The application
of model 2 was needed when the C measurements were
transformed into the other scales. The analyses of NC
probabilities of milk samples showed that NC samples
from one methodology were well distinguishable (with
an accuracy of 0.972–0.996) based on the rennet coagulation
time measured with the other methodology. A
standard definition for MCP traits analysis is needed
to enable reliable comparisons between MCP traits recorded
in different laboratories and in different animal
populations and breeds
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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