1,720,964 research outputs found
Canine Detection and Discrimination of Cadaveric Human Blood.
No full textAfter attending this presentation, attendees will have a better understanding of how a well-trained detection dog team can maximize the collection of evidence from crime scene and improve investigative efforts This presentation will impact the forensic science community by providing a variety of benefits to law enforcement regarding the need to improve the performance, reliability, and courtroom defensibility of detection dog teams and their optimized combination with both medical and forensic operators
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Cani da cadavere: “dispositivo biologico specializzato” nell’individuazione di tracce ematiche latenti sulla scena del crimine. Da mito a prova scientifica.
No full textAim. The canis lupus familiaris, due to his
particular olfactory characteristics, is used
by the police to detect a wide range of substances
(explosives, gunpowder, narcotics,
etc.). Trained dogs to the discovery and reporting
human remains or not visible cadaveric
blood, can be of great help. This study
set out to investigate and validate with scientific
method, a training protocol of dogs
specialized for research, tracking and reporting
of cadaveric latent blood traces of blood.
Methods. We used two Labrador Retriever.
The study was conducted for sixteen months,
with about 200 hours of simulation and 6240
surveys, within a room suitably equipped.
We used blood of four patients who died due
to trauma, collected in sterile and VOCs free
tubes. The first phase of the training focused
on the ability of the two dogs to hold the
smell target and signal their presence at concentrations
always decreasing. In the second
phase confounding factors were introduced.
Results. The study found the real effectiveness
of dogs trained to identify human cadaveric
blood in very low concentrations. Tests
conducted have shown a good ability to discriminate
human cadaveric blood in combination
with confounding factors in high concentrations
(olfactory accuracy). Conclusion. The use of dogs in this area necessarily
requires standardization of training procedures in order to achieve “certified” for
this specialized biological device the same
rigorous level of reliability and reproducibility
required for all methods of investigation in
the forensic field, through an optimized and
tightly controlled training, through the evaluation
of olfactory sensitivity, the ability of olfactory
discrimination and olfactory accuracy
Volatile Organic Compounds — From Science to Victim Recovery Canine Training: A Method to Aid in Determining the Location of Human Remains
No full text
Volatile Organic Compounds — From Science to Victim Recovery Canine Training: A Method to Aid in Determining the Location of Human Remains
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