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Banca dati tossicologica delle sostanze rinvenibili nel suolo, schede tossicologiche: finalità e applicazioni
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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
Self-Administration of Anesthetic (Propofol and Midazolam) and Psychotropic (Amitriptyline and Zolpidem) Drugs: Recreational Abuse and Suicidal Manner in an Anesthetist
No full textAfter attending this presentation, attendees will understand that
forensic investigations are based on a multidisciplinary approach in
which autopsy findings and toxicological results often result in
association with circumstances and crime scene investigations.
This presentation will impact the forensic science community by
demonstrating how recreational abuse of anesthetic and sedative agents
in health care practitioners, especially anesthesiologists is an increasing
event. This presentation will also show an unusual case of suicide in
which the manner and means of suicide was dependent upon the
occupation of the victim.
Presented is a case of a 50-year-old man, anesthetist at the main
local hospital, who was found dead in the house where he lived alone
since separating from his wife. On the previous evening he was found
on the landing’s floor with an occipital bruise injury and treated in the
Emergency Department. The next day his brother, alerted by his
colleagues that tried in vain to contact him, went to his house. He found
that the front door had been left ajar, with a piece of furniture behind it. When he entered the flat, he noticed the corpse of the brother, supine on
the living room’s floor near a piece of furniture. There were two drips
with intravenous tubes almost empty (approximately 1 ml). One drip
was still inserted in the dorsum of the victim’s right hand with tube for
intravenous drip totally open. On the glass of this drip there was written
“Miclela Caput” (meaning “Caput Mixture,” written incorrectly). On the
glass of the other drip there was written “500 TPS+200 DIPR” (meaning
Sodium Thiopental+Diprivan). In the house there were some empty
blisters of Zolpidem, more than 20 packs of different drugs (some of
them empty), an ash-tray containing white liquid, several empty
ampoules of Propofol, Midazolam and Thiopental, and several new and
used syringes. In the bedroom there were two knapsacks containing
pornographic materials and four plastic phalli.
External examination revealed abundant livor mortis, numerous
recent needle marks with fresh and older hemorrhages in both arms, and
a sutured occipital injury.
Autopsy and histological findings were pulmonary and brain
oedema, moderate fatty liver, acute poly-visceral congestion,
hemorrhagic pancreatitis.
Systematic toxicological analysis was performed on biological and
non biological samples for alcohol, drugs of abuse and pharmaceuticals.
Blood toxicological examination by GC/MS revealed lethal
concentration of Zolpidem (0.86 μg/ml) and high therapeutic blood
concentrations of Propofol (0.30 μg/ml), Midazolam (0.08 μg/ml),
Amitriptyline (0.07 μg/ml), and low concentration of Thiopental (0.03
μg/ml). Zolpidem was also found in gastric content while Thiopental
was found in urine. Hair segment analysis (0 – 2 cm) revealed Propofol
(4,7 μg/mg) and the presence of Zolpidem, Amitriptyline
and Ketoprofen.
Residual’s toxicological analysis of the inserted drip (“Caput
mixture”) revealed Propofol and Midazolam (approximately 1,9 and
0,08 mg/ml). Analysis of the non-inserted drip, showed Propofol and
Thiopental (approximately 2 and 5 mg/ml). The low blood concentration
of Thiopental suggests a self administration of the non-inserted drip at
least 12 hours before death.
The blood Propofol level was lower than or within the commonly
accepted therapeutic range of 1.3– 6.8 μg/ml after a standard anesthetic
induction dose. Published reports indicate that in most cases, the
postmortem Propofol concentrations were at therapeutic levels. It should
be pointed out that especially for those agents used in anesthesia; the
therapeutic concentrations refer to patients being supported respiratorywise,
while in non-supported or non-intubated patients such
concentrations may be lethal. Most of those deaths are thought to have
occurred because of the rapidity of Propofol’s injection which led to
apnea and death. A mere interpretation of the blood and tissue
concentrations of Propofol in the toxicological analysis may be of
limited diagnostic significance without taking into account the before
mentioned reports. Toxicological analysis of hair confirmed the
recreational abuse of Propofol.
These anesthetic and sedative drugs are often used in combination
for anesthesia’s induction. All of these act synergistically in combination
and may induce respiratory depression. This effect depends on
individual susceptibility, on dose used and, especially for Propofol and
Midazolam, infusion’s rapidity.
In conclusion, the victim was administered a solution of anesthetic
drugs, rapidly infused in a lethal combination and simultaneously a
hypnotic drug in lethal dose
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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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