1,720,991 research outputs found
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
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
INFLUENCE OF METEOROLOGICAL ELEMENTS ON THE INCIDENCE OF ACUTE ISCHEMIC STROKE AND ON THE INICIAL NEUROLOGICAL STATUS IN PATIENTS TREATED WITH THE METHOD OF MECHANICAL THROMBECTOMY AT THE CLINICAL HOSPITAL CENTER RIJEKA
No full textPrema Svjetskoj zdravstvenoj organizaciji, moždani udar podrazumijeva klinički sindrom kod kojeg dolazi do naglog nastanka neurološkog deficita što često dovodi i do smrti. Prema podacima iz Hrvatskog zdravstveno-statističkog ljetopisa za 2021. godinu smrtnost od cerebrovaskularnih bolesti treći je uzrok smrtnosti i ima udio od 8 % u ukupnom mortalitetu. Najbolji pristup moždanom udaru je prevencija. Opaženo je da na pojavnost moždanog udara imaju utjecaj i klimatske promjene. Povezanost meteoroloških elemenata s incidencijom moždanog udara iziskuje dodatna istraživanja kako bi se mogla predvidjeti vjerojatnost pojave moždanog udara u budućnosti i isti prevenirati. Retrospektivno se ispitao utjecaj meteoroloških elemenata na pojavnost
moždanog udara i na inicijalni neurološki status. Neurološki status se procjenjivao s nacionalnom ljestvicom za procjenu moždanog udara. Istraživanjem su obuhvaćeni bolesnici s akutnim ishemijskim moždanim udarom liječeni metodom mehaničke trombektomije u periodu od 1. siječnja do 31. prosinca 2022. godine, te bolesnici koji su hospitalizirani na Klinici za neurologiju
u isto vrijeme, a nisu bili kandidati za mehaničku trombektomiju. Od meteoroloških elementa analizirale su se vrijednosti tlaka, temperature i vlažnosti zraka za područje grada Rijeke, a prema izvješću Državnoga hidrometeorološkog zavoda. Uspoređujući promatrane meteorološke podatke u odnosu na učinjene trombektomije tijekom 2022. godine utvrđena je slaba pozitivna povezanost s tlakom zraka te negativna povezanost s temperaturom i s količinom oborina. Pri usporedbi promatranih meteoroloških podataka na dan pojave simptoma, a u odnosu na inicijalni neurološki status kod bolesnika kod kojih se učinila mehanička trombektomija postoji negativna povezanost sa sva tri meteorološka elementa.According to the World Health Organization, stroke implies a clinical syndrome in which there is a sudden onset of a neurological deficit, which often leads to death. Ac cording to data from the Croatian Health and Statistical Yearbook for 2021, mortality from cerebrovascular diseases is the third cause of mortality and has a share of 8% in total mortality. The best approach to stroke is prevention. It has been observed that the incidence of stroke is also influenced by climate change. The association of meteorological elements with the incidence of stroke requires additional research in order to predict the likelihood of stroke in the future and prevention. Materials and methods: Retrospectively examined the influence of meteorological elements on the incidence of stroke and on the initial neurological status. Neurological status was assessed with the national stroke assessment scale. The study included patients with acute ischemic stroke treated with the method of mechanical thrombectomy in the period from January 1 to December 31,2022, and patients who were hospitalized at the Department of Neurology at the same time and were not candidates for mechanical thrombectomy. From meteorological elements, the values of pressure, temperature and humidity in the area of the city of Rijeka were analyzed, according to the report of the Meteorological and Hydrological Service. Comparing the observed meteorological data in relation to thrombectomies performed during 2022, there was a weak positive association with air pressure and a negative association with temperature and precipitation. When comparing observed meteorological data on the day of symptoms, and in relation to the initial neurological status in patients who had a mechanical thrombectomy, there is a negative association with all three meteorological elements. By analyzing the data, the impact of meteorological elements of acute ischemic stroke as well as on the initial neurological status was observed, as well as the need for more extensive research in this area
Clinical characteristics, diagnostics and treatment of cervical artery dissections
No full textUvod: Disekcija krvnih žila vrata karakterizirana je naglim istezanjem, edemom te razdorom
stijenke arterije i pojavom krvarenja unutar stijenke arterije što može rezltirati infarktom
mozga. Uobičajena pojavnost je u mlađoj i populaciji srednjih godina s vrhom incidencije 50-
ih godina. Lokalizacije disekcije najčešće su u području najveće mobilnosti.
Svrha rada: Cilj istraživanja 23 pacijenta zahvaćenih disekcijom krvnih žila vrata jest spoznati
učestalost pojave nastalih disekcija, uzroke i predisponirajuće faktore. Opisati najčešću
simptomatologiju, pojavu infarkta mozga, provedenu dijagnostiku te način liječenja. Rezultati
su se usporedili s drugim provednim istraživanjima.
Ispitanici i metode: Istraživanje se odnosilo na analizu 23 pacijenta disekcije krvnih žila vrata
u trogodišnjem razdoblju od 1.1.2021. do 31.12.2023. na Klinici za neurologiju Kliničkog
bolničkog centra Rijeka. 13 pacijenata imalo je disekciju vertebralne arterije, a 10 pacijenata
disekciju karotidne arterije vrata.
Rezultati: S obzirom na dob i spol učestalost disekcija češća je u muškog spola (78,26%).
Prosječna starosna dob svih pacijenata zahvaćenih disekcijom iznosi 59 godina i 2 mjeseca.
Ukupno gledajući, 20 pacijenata od ukupno 23 imalo je spontani nastanak disekcije (86,96%),
a 3 pacijenta traumatsku podlogu nastanka (13,04%). Jedanaest pacijenata s disekcijom
vertebralne arterije rezultiralo je infarktom mozga, a 8 pacijenta s disekcijom karotidne arterije,
pri čemu je jedan pacijent preminuo. Vodeći simptomi disekcije vertebralne arterije su
vrtoglavica priustna u 5 pacijenata (38,46%) i hemipareza u 5 (38,46%). Pacijenti s disekcijom
karotidne arterije također pokazuju prevalenciju hemipareze prisutnu u 5 pacijenata (50%).
Najčešće korištena dijagnostička metoda je CTA. Kod disekcije vertebralne arterije korištena
je u 12 pacijenata (92,30%), a kod disekcije karotidne arterije u 9 pacijenata (90%). Analizom
pacijenata disekcije vertebralne arterije antiagregacijski lijekovi (84,61%) prednjače u malom
postotku u odnosu na antikoagulacijsku terapiju (76,92%). Svim pacijentima s disekcijom
karotidne arterije primijenjena je kombinirana antikoagulacijska i antiagregacijska terapija
(100%).
Zaključak: Istraživanje obuhvaća 23 pacijenta s disekcijom krvnih žila vrata. Prevalencija
disekcija odnosi se na muški spol (78,26%). 20 pacijenata je imalo spontani nastanak disekcije
(86,96%). 11 pacijenata imalo je hipertenziju kao vodeći čimbenik rizika (47,83%). Vodeća
simptomatologija obje skupine pacijenata je hemipareza, 5 pacijenata (38,46%) skupine
disekcija vertebralne arterije i 5 pacijenata disekcije unutarnje karotidne arterije (50%). Osim
hemipareze, pacijenti s disekcijom vertebralne arterije imaju vrtoglavicu kao vodeći simptom s
jednakom učestalošću (38,46%). 19 pacijenata rezultiralo razvojem infarkta (82,61%), a jedan
pacijent iz skupine disekcija unutarnje karotidne arterije je preminuo (4,35%). Dijagnostika
CTA korištena je u 21 pacijenta (91,30%), a MRA druga je po zastupljenosti primijenjena u 10
pacijenata (43,48%). Liječenje obje skupine disekcija većinom je provedeno sukladno
smjernicama dvojnom antiagregacijskom terapijom koja je slijedila kombinacije
antikoagulacijskih i antiagregacijskih lijekova uz dvoje bolesnika u kojih je prethodno učinjena
mehanička trombektomija sukladno smjernicama za liječenje moždanog udara.Introduction: Dissection is characterized by the rupture of the first layer in contact with the
blood and the entry of blood between the layers of the artery wall, visible in the form of a
hematoma. In most cases, it results in brain infarction. The usual occurrence is in the younger
and middle-aged population with the peak incidence in the 50s. Localization of dissections are
most common in the area of greatest mobility.
Purpose: The aim of the study of 23 patients affected by dissection of blood vessels in the neck
is to find out the frequency of occurrence of dissections and their previous causes. Describe the
most common symptomatology, occurrence of brain infarction, performed diagnostics and
method of treatment. The results were compared with other conducted researches.
Subjects and methods: The research referred to the analysis of 23 patients with dissection of
blood vessels of the neck in a three-year period from January 1, 2021. until 31.12.2023. at the
Neurology Clinic of the Rijeka Clinical Hospital Center. 13 patients had dissection of the
vertebral artery, and 10 patients had dissection of the carotid artery of the neck.
Results: With regard to age and sex, the frequency of dissections is more common in men
(78.26%). The average age of all patients affected by dissection is 59 years and 2 months.
Overall, 20 patients out of a total of 23 had a spontaneous onset of dissection (86.96%), and 3
patients had a traumatic origin (13.04%). 11 patients with vertebral artery dissection resulted in
brain infarction. 8 patients with carotid artery dissection resulted in brain infarction, with one
patient dying. The leading symptoms of vertebral artery dissections are dizziness (38.46%) and
unilateral weakness (38.46%), the carotid artery also shows unilateral weakness (50%) as
leading. The most frequently used diagnostic method is CTA. In vertebral artery dissection, it
was used in 12 patients (92.30%), and in carotid artery dissection in 9 patients (90%). Analyzing
patients with vertebral artery dissection, antiplatelet drugs (84.61%) lead in a small percentage
compared to anticoagulation therapy (76.92%). All patients with carotid artery dissection
received anticoagulation and antiplatelet therapy (100%).
Conclusion: The research includes 23 patients with dissection of blood vessels of the neck. The
prevalence of dissections refers to the male gender (78.26%). 20 patients had spontaneous onset
of dissection (86.96%). 11 patients had hypertension as the leading risk factor (47.83%). The
leading symptomatology of both groups of patients is hemiparesis, 5 patients (38.46%) of the
vertebral artery dissection group and 5 patients of internal carotid carotid artery dissection
(50%). In addition to hemiparesis, patients with vertebral artery dissection have dizziness as the
leading symptom with equal frequency (38.46%). 19 patients resulted in the development of a
heart attack (82.61%), and one patient from the internal carotid artery dissection group died
(4.35%). Diagnostic CTA was used in 21 patients (91.30%), and MRA was the second most
frequently used in 10 patients (43.48%). The treatment of both groups of dissections mostly
focused on the use of a common combination of anticoagulation and antiplatelet drugs, of which
a small number of patients were previously exposed to the mechanical thrombectomy
procedure
INFLUENCE OF METEOROLOGICAL ELEMENTS ON THE INCIDENCE OF ACUTE ISCHEMIC STROKE AND ON THE INICIAL NEUROLOGICAL STATUS IN PATIENTS TREATED WITH THE METHOD OF MECHANICAL THROMBECTOMY AT THE CLINICAL HOSPITAL CENTER RIJEKA
No full textPrema Svjetskoj zdravstvenoj organizaciji, moždani udar podrazumijeva klinički sindrom kod kojeg dolazi do naglog nastanka neurološkog deficita što često dovodi i do smrti. Prema podacima iz Hrvatskog zdravstveno-statističkog ljetopisa za 2021. godinu smrtnost od cerebrovaskularnih bolesti treći je uzrok smrtnosti i ima udio od 8 % u ukupnom mortalitetu. Najbolji pristup moždanom udaru je prevencija. Opaženo je da na pojavnost moždanog udara imaju utjecaj i klimatske promjene. Povezanost meteoroloških elemenata s incidencijom moždanog udara iziskuje dodatna istraživanja kako bi se mogla predvidjeti vjerojatnost pojave moždanog udara u budućnosti i isti prevenirati. Retrospektivno se ispitao utjecaj meteoroloških elemenata na pojavnost
moždanog udara i na inicijalni neurološki status. Neurološki status se procjenjivao s nacionalnom ljestvicom za procjenu moždanog udara. Istraživanjem su obuhvaćeni bolesnici s akutnim ishemijskim moždanim udarom liječeni metodom mehaničke trombektomije u periodu od 1. siječnja do 31. prosinca 2022. godine, te bolesnici koji su hospitalizirani na Klinici za neurologiju
u isto vrijeme, a nisu bili kandidati za mehaničku trombektomiju. Od meteoroloških elementa analizirale su se vrijednosti tlaka, temperature i vlažnosti zraka za područje grada Rijeke, a prema izvješću Državnoga hidrometeorološkog zavoda. Uspoređujući promatrane meteorološke podatke u odnosu na učinjene trombektomije tijekom 2022. godine utvrđena je slaba pozitivna povezanost s tlakom zraka te negativna povezanost s temperaturom i s količinom oborina. Pri usporedbi promatranih meteoroloških podataka na dan pojave simptoma, a u odnosu na inicijalni neurološki status kod bolesnika kod kojih se učinila mehanička trombektomija postoji negativna povezanost sa sva tri meteorološka elementa.According to the World Health Organization, stroke implies a clinical syndrome in which there is a sudden onset of a neurological deficit, which often leads to death. Ac cording to data from the Croatian Health and Statistical Yearbook for 2021, mortality from cerebrovascular diseases is the third cause of mortality and has a share of 8% in total mortality. The best approach to stroke is prevention. It has been observed that the incidence of stroke is also influenced by climate change. The association of meteorological elements with the incidence of stroke requires additional research in order to predict the likelihood of stroke in the future and prevention. Materials and methods: Retrospectively examined the influence of meteorological elements on the incidence of stroke and on the initial neurological status. Neurological status was assessed with the national stroke assessment scale. The study included patients with acute ischemic stroke treated with the method of mechanical thrombectomy in the period from January 1 to December 31,2022, and patients who were hospitalized at the Department of Neurology at the same time and were not candidates for mechanical thrombectomy. From meteorological elements, the values of pressure, temperature and humidity in the area of the city of Rijeka were analyzed, according to the report of the Meteorological and Hydrological Service. Comparing the observed meteorological data in relation to thrombectomies performed during 2022, there was a weak positive association with air pressure and a negative association with temperature and precipitation. When comparing observed meteorological data on the day of symptoms, and in relation to the initial neurological status in patients who had a mechanical thrombectomy, there is a negative association with all three meteorological elements. By analyzing the data, the impact of meteorological elements of acute ischemic stroke as well as on the initial neurological status was observed, as well as the need for more extensive research in this area
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