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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
Urgent carotid endarterectomy in patients with acute neurological ischemic events in progression
Get PDFCilj: Analizirati uspešnost neurološkog oporavka ispitanika nakon urgentne karotidne
endarterektomije (UKE), u zavisnosti od vrste akutnog preoperativnog neurološkog
deficita, kao i analiza ranih i udaljenih rezultata UKE u odnosu na rezultate elektivne
karotidne endarterektomije.
Metodologija: U periodu od januara 1998. do decembra 2012. godine, u Institutu za
kardiovaskularne bolesti “Dedinje” učinjeno je 8244 endarterektomije karotidne arterije
everzionom tehnikom. Kod 76 bolesnika, koji su podeljeni u dve grupe, je učinjena
UKE zbog akutnog neurološkog deficita u razvoju. Prvu grupu čini 61 ispitanik koji je
imao krešendo TIA, dok II grupu čine 15 pacijenata sa slikom moždanog udara (MU) u
razvoju. UKE je učinjena u roku do šest sati od početka akutnog neurološkog događaja.
CT endokaranijuma je učinjen pre, kao i postoperativno. Radi procene preoperativnog
neurološkog poremećaja, kao i postoperativnog neurološkog stanja, korišćena je
modifikovana skala Rankin skora (mRS).
Rezultati: Prosečni period praćenja iznosio je 96,3±53,9 meseci za I grupu, odnosno
94,4±51,3 meseca za II grupu. U ranom postoperativnom periodu, svi pacijenti "krešendo
TIA" grupe kao i 11 bolesnika (73,3%) grupe "MU u razvoju" imali su odličan neurološki
oporavak, dok je kod 4 pacijenta (26,7%) druge grupe postoperativni CT mozga bio
pozitivan na ishemiju, ali uz značajan neurološki oporavak kod tri. U ranom
postoperativnom periodu nije registrovan smrtni ishod. Tokom perida praćenja, jedan
bolesnik (1,6%) I grupe imao je manji MU sa uspešnim oporavkom, a kod dva bolesnika
zabeležena je restenoza (>50%) unutrašnje karotidne arterije. Jedan pacijent (6,7%) grupe "MU u razvoju" imao je masivni MU praćen smrtnim ishodom.
Zaključak: UKE je metoda izbora hirurškog lečenja kod bolesnika sa krešendo TIA i
verifikovanom karotidnom stenozom. MU u razvoju je prihvatljiva indikacija za UKE.
Rani i udaljeni rezultati hirurškog lečenja ispitanika kod kojih je učinjena UKE zbog
krešendo TIA, se ne razlikuju od rezultate lečenja pacijenata kod kojih je učinjena
elektivna karotidna endarterektomija.Objective: The aim of this study was to analyze the outcome of urgent carotid
endarterectomy (CEA) with respect to the type of preoperative acute neurogical deficit,
and an analysis of early and late results urgent CEA from the results of elective CEA.
Methods: From January 1998 to December 2012, 8244 eversion CEAs were done at
„Dedinje“ Cardiovascular Institute. In 76 patients urgent CEA was performed for acute
neurologival ischemic events- 61 patients with crescendo TIA (group I) and 15 patients
with stroke in progression (group II). All procedures were performed within 6 hours after
symptoms appeared. Brain CT was done prior and after the surgery. Disability level was
assessed prior to and after urgent CEA using modified Rankin scale (mRS).
Results: Median follow up was 96.3±53.9 months for group I and 94.4±51.3 months for
group II. In the early postoperative period all patients in crescendo TIA group and eleven
patients (73.3%) in stroke in progression group had excellent recovery while in patients
with stroke in progression group 4 patients (26.7%) had brain CT positive for ishemia,
yet neurological status significantly improved in 3 patients. In the early postoperative
period there no lethal outcomes. During the follow-up, on patient (1.6%) of first group
had minor stroke and fully fecovered and in two patients was observed restenosis (>
50%) internal carotid artery. In stroke in progression group one patient (6.7%) had major
stroke followed by lethal outcome.
Conclusions: Based on our results urgent CEA is a safe and effective treatment option
for patients with crescendo TIA. Stroke in evolution is acceptable indication for urgent
CEA. Early and late results of surgical treatment of patients who underwent urgent CEA
for crescendo TIA, do not differ from the results of treatment of patients who underwent
elective CEA
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
Urgent carotid endarterectomy in patients with acute neurological ischemic events in progression
No full textCilj: Analizirati uspešnost neurološkog oporavka ispitanika nakon urgentne karotidne
endarterektomije (UKE), u zavisnosti od vrste akutnog preoperativnog neurološkog
deficita, kao i analiza ranih i udaljenih rezultata UKE u odnosu na rezultate elektivne
karotidne endarterektomije.
Metodologija: U periodu od januara 1998. do decembra 2012. godine, u Institutu za
kardiovaskularne bolesti “Dedinje” učinjeno je 8244 endarterektomije karotidne arterije
everzionom tehnikom. Kod 76 bolesnika, koji su podeljeni u dve grupe, je učinjena
UKE zbog akutnog neurološkog deficita u razvoju. Prvu grupu čini 61 ispitanik koji je
imao krešendo TIA, dok II grupu čine 15 pacijenata sa slikom moždanog udara (MU) u
razvoju. UKE je učinjena u roku do šest sati od početka akutnog neurološkog događaja.
CT endokaranijuma je učinjen pre, kao i postoperativno. Radi procene preoperativnog
neurološkog poremećaja, kao i postoperativnog neurološkog stanja, korišćena je
modifikovana skala Rankin skora (mRS).
Rezultati: Prosečni period praćenja iznosio je 96,3±53,9 meseci za I grupu, odnosno
94,4±51,3 meseca za II grupu. U ranom postoperativnom periodu, svi pacijenti "krešendo
TIA" grupe kao i 11 bolesnika (73,3%) grupe "MU u razvoju" imali su odličan neurološki
oporavak, dok je kod 4 pacijenta (26,7%) druge grupe postoperativni CT mozga bio
pozitivan na ishemiju, ali uz značajan neurološki oporavak kod tri. U ranom
postoperativnom periodu nije registrovan smrtni ishod. Tokom perida praćenja, jedan
bolesnik (1,6%) I grupe imao je manji MU sa uspešnim oporavkom, a kod dva bolesnika
zabeležena je restenoza (>50%) unutrašnje karotidne arterije. Jedan pacijent (6,7%) grupe "MU u razvoju" imao je masivni MU praćen smrtnim ishodom.
Zaključak: UKE je metoda izbora hirurškog lečenja kod bolesnika sa krešendo TIA i
verifikovanom karotidnom stenozom. MU u razvoju je prihvatljiva indikacija za UKE.
Rani i udaljeni rezultati hirurškog lečenja ispitanika kod kojih je učinjena UKE zbog
krešendo TIA, se ne razlikuju od rezultate lečenja pacijenata kod kojih je učinjena
elektivna karotidna endarterektomija.Objective: The aim of this study was to analyze the outcome of urgent carotid
endarterectomy (CEA) with respect to the type of preoperative acute neurogical deficit,
and an analysis of early and late results urgent CEA from the results of elective CEA.
Methods: From January 1998 to December 2012, 8244 eversion CEAs were done at
„Dedinje“ Cardiovascular Institute. In 76 patients urgent CEA was performed for acute
neurologival ischemic events- 61 patients with crescendo TIA (group I) and 15 patients
with stroke in progression (group II). All procedures were performed within 6 hours after
symptoms appeared. Brain CT was done prior and after the surgery. Disability level was
assessed prior to and after urgent CEA using modified Rankin scale (mRS).
Results: Median follow up was 96.3±53.9 months for group I and 94.4±51.3 months for
group II. In the early postoperative period all patients in crescendo TIA group and eleven
patients (73.3%) in stroke in progression group had excellent recovery while in patients
with stroke in progression group 4 patients (26.7%) had brain CT positive for ishemia,
yet neurological status significantly improved in 3 patients. In the early postoperative
period there no lethal outcomes. During the follow-up, on patient (1.6%) of first group
had minor stroke and fully fecovered and in two patients was observed restenosis (>
50%) internal carotid artery. In stroke in progression group one patient (6.7%) had major
stroke followed by lethal outcome.
Conclusions: Based on our results urgent CEA is a safe and effective treatment option
for patients with crescendo TIA. Stroke in evolution is acceptable indication for urgent
CEA. Early and late results of surgical treatment of patients who underwent urgent CEA
for crescendo TIA, do not differ from the results of treatment of patients who underwent
elective CEA
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
Association of obesity and diabetes mellitus with early and late outcomes after carotid endarterectomy
No full textUvod: Podaci o povezanosti dijabetesa melitusa (DM) i gojaznosti sa ishodima karotidne endarterektomije (KEA) nisu konzistentni, a uticaj njihovog istovremenog prisustva na rezultate KEA je nedovoljno ispitan. Cilj: Ispitivanje pojedinačnog i zajedničkog uticaja DM i gojaznosti, kao i drugih potencijalnih faktora rizika, na pojavu ranih i kasnih nepovoljnih ishoda KEA. Metod: Kohortnom studijom je obuhvaćeno 1597 KEA urađenih kod 1533 pacijenta Klinike za vaskularnu hirurgiju Instituta za kardiovaskularne bolesti „Dedinje“ u Beogradu, u periodu 2012-2017. Pacijenti su praćeni 4 godine od operacije.
Rezultati: Tip 1 DM (T1DM) nije bio povezan sa ranim nepovoljnim ishodima KEA. Od kasnih nepovoljnih ishoda, pacijenti sa T1DM su češće imali infarkt miokarda, smrtni ishod i restenozu. Pacijenti sa tipom 2 DM (T2DM) su češće imali TIA/moždani udar, smrtni ishod, respiratorne komplikacije i reoperacije od ranih nepovoljnih ishoda, kao i sve kasne nepovoljne ishode izuzev infarkta miokarda. Predgojaznost i gojaznost nisu bili povezani sa ranim i kasnim nepovoljnim ishodima KEA. Jedini izuzetak su bila perioperativna krvarenja koja su bila ređa kod predgojaznih. Gojazni pacijenti sa DM su, u odnosu na pacijente bez DM, češće imali TIA/moždani udar, smrtni ishod i respiratorne komplikacije od ranih nepovoljnih ishoda, kao i moždani udar i restenozu od kasnih. Između gojaznih i negojaznih pacijenata sa DM nije bilo razlike u učestalosti ni ranih ni kasnih komplikacija posle KEA. Prediktori glavnih ranih nepovoljnih ishoda KEA bili su prethodna perkutana koronarna intervencija i povišeni trigliceridi, dok su aspirin i ACEI u terapiji na otpustu bili protektivni. Prediktori glavnih kasnih nepovoljnih ishoda KEA bili su T1DM, uzrast, periferna arterijska bolest, kontralateralna karotidna stenoza i OAK u terapiji na otpustu. Rekreativna fizička aktivnost pre operacije identifikovana je kao protektivni faktor za pojavu kasnog infarkta miokarda/moždanog udara.
Zaključak: Identifikovani prediktori nepovoljnih ishoda KEA ukazuju na potrebu korekcije životnih navika i precizniji odabir medikamentne terapije.Introduction: Data on the association of diabetes mellitus (DM) and obesity with carotid endarterectomy (CEA) outcomes are inconsistent, and the effect of their simultaneous presence on the results of CEA is insufficiently investigated.
Aim: To investigate the individual and simultaneous effect of DM and obesity, as well as the effect of other potential risk factors on the occurrence of early and late adverse outcomes of CEA.
Method: The cohort study included 1597 CEA performed in 1533 patients at the Clinic for Vascular Surgery, Institute for Cardiovascular Diseases "Dedinje" in Belgrade, from 2012-2017. Patients were followed for 4 years after surgery.
Results: Type 1 DM (T1DM) was not associated with early adverse outcomes of CEA. Regarding the late adverse outcomes, patients with T1DM had myocardial infarction, death and restenosis more frequently. Patients with type 2 DM (T2DM) had more freaquently TIA/stroke, death, respiratory complications and reoperations as early adverse outcomes, as well as all late adverse outcomes except myocardial infarction. Overweight and obesity were not associated with early and late adverse outcomes of CEA. The only exception was perioperative bleeding, which was less frequent in overweight patients. Obese patients with DM, compared to patients without DM, had more freaquently TIA/stroke, death and respiratory complications as early adverse outcomes, as well as stroke and restenosis as late adverse outcomes. Between obese and non-obese patients with DM there were no differences in the frequency of neither early nor late complications after CEA. Predictors of the early major adverse outcomes of CEA were previous percutaneous coronary intervention and higher triglyceride levels, while aspirin and ACEI in discharge therapy were protective. Predictors of the late major adverse outcomes of CEA were T1DM, age, peripheral arterial disease, contralateral carotid stenosis and OAK in discharge therapy. Preoperative recreational physical activity has been identified as a protective factor for the occurrence of late myocardial infarction/stroke.
Conclusion: Identified predictors of adverse CEA outcomes indicate the need for correction of lifestyle habits and more precise selection of medical therapy
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