1,720,988 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
EQUIPMENT AND MACHINES FOR THE MAINTENANCE OF PLANTATIONS IN THE VINEYARD SOLDO WINERY
No full textU ovom završnom radu dajemo pregled uređaja i strojeva koji se koriste za održavanje vinograda vinarije Soldo. Poseban naglasak dan je na utjecaj modernih strojeva na povećanje produktivnosti na gospodarstvuIn this final paper, we provide an overview of the devices and machines used to maintain the vineyards of the Soldo winery. Particular emphasis is given to the impact of modern machines on increasing productivity in the Soldo winery
Digital evaluation of the difference in color of natural teeth measured with a spectrophotometer and a smartphone using Smile Lite Mobile Dental Photography illuminator
No full textSvrha istraživanja bila je usporediti razlike u vrijednostima triju parametara boje gornjih desnih
središnjih sjekutića izmjerenih spektrofotometrom, te kalibriranih i nekalibriranih RAW i JPEG
formata fotografija snimljenih trima pametnim telefonima koristeći Smile Lite MDP uređaj.
U istraživanju je sudjelovalo ukupno 45 ispitanika. CIE L*a*b* vrijednosti na središnjoj trećini
gornjih desnih središnjih sjekutića izmjerene su spektrofotometrom i na RAW i JPEG
kalibiranim i nekalibriranim fotografijama snimljenima trima različitim pametnim telefonima
u različitim uvjetima osvjetljenja te sivom kalibrirajućom karticom. Boja zuba na fotografijama
mjerena je u kompjuterskom programu Adobe Lightroom 6. Dobiveni rezultati su međusobno
uspoređeni. Većina CIE L*a*b* vrijednosti na RAW i JPEG fotografijama na sva tri testirana
pametna telefona u različitim uvjetima osvjetljenja statistički su se značajno razlikovale
(p<0,05). Razlika u većini CIE L*a*b* vrijednosti boje između kalibriranih i nekalibriranih
fotografija na sva tri pametna telefona bila je statistički značajna (p<0,05). CIE L*a*b*
vrijednosti kalibriranih i nekalibriranih RAW i JPEG fotografija svih triju testiranih pametnih
telefona statistički su se značajno razlikovale (F=29.780; p=0.000). CIE L*a*b* vrijednosti na
nekalibriranim RAW fotografijama snimljenima iPhone 11 Pro pametnim telefonom uz
uporabu polarizacijskog filtera potpuno su se poklapale s istim vrijednostima izmjerenima
spektrofotometrom (p>0.05).
Različiti uvjeti osvjetljenja, postupci mjerenja, format fotografije i vrsta pametnog telefona u
ovom su istraživanju utjecali na CIE L*a*b* vrijednosti na fotografijama snimljenima
pametnim telefonom. Uz ograničenja ovog istraživanja moguće je zaključiti da bi se
nekalibrirana RAW fotografija snimljena iPhone 11 Pro pametnim telefonom, s polarizirajućim
filterom na prednjem diodnom svjetlu u standardiziranim uvjetima, mogla koristiti pri
digitalnom određivanju boje zuba.Introduction: For many years dental professionals have been using dental photography for
diagnostic and treatment planning, documentation, publishing, education, marketing and
communication with patients, dental technicians and colleagues. More recently, dental
photography became very important for detecting facial pattern changes after orthodontic
treatment, maxillofacial surgery, prosthetic oral rehabilitation and digital smile planning.
Digital Single Lens Reflex (DSLR) cameras are considered as the “golden standard” cameras
used to take high quality dental photographs. Past few years smartphone cameras have advanced
in terms of sensor quality, resolution and lens sophistication and mobile dental photography is
becoming more and more popular among dentists. Digital shade measurement determining
tooth color was developed in order to reduce and overcome the inaccuracies and inconsistencies
of traditional methods of tooth shade determination. Studies have shown that
spectrophotometers are among the most accurate instruments for tooth color matching.
Spectrophotometer Vita Easyshade V has become a reference device for determining tooth
color in numerous clinical studies and has been used to determine the color of various dental
materials. Numerous studies have confirmed the accuracy and repeatability of color
measurements of these devices.
Aim: The purpose of the study was to compare the differences in the values of the three color
parameters of the upper right central incisors measured by a spectrophotometer, and calibrated
and uncalibrated RAW and JPEG digital photos taken with three smartphones using a Smile
Lite MDP device.
Participants and methods:
The study was conducted on 45 subjects. This study included those subjects with intact
permanent upper central incisor without fillings and caries, endodontic procedures and
prosthetic replacements, the presence of periodontal disease or any form of discoloration, and
those who do not have fixed orthodontic retainers and have not undergone teeth whitening
therapy for a year. The measurement took place in the research room without the natural light
source (no windows), with fluorescent lighting (4 x 120 cm, 36 W, color 765, Philips, Hamburg,
Germany), light temperature of 5080 K and illuminance of 500 lux measured using colorimeter
Chroma-2. At each measurement infection control shield was placed over the probe tip when
using Easyshade V spectrophotometer set in “tooth single” mode. The probe tip was positioned
on the surface of the central area of the middle third of each right maxillary central incisor and
this position was marked using a red waterproof marker to ensure later accurate positioning of
the digital probe. Before each measurement the device was calibrated according to the
manufacturer's instructions.
All subjects were photographed in a standing upright position leaning against a wall with a
retractor placed in their mouth. Subjects held a grey card under the upper front teeth when
photographing, which serves as a color calibrator in digital image analysis. All photographs in
this study were taken using a Smile Lite Mobile Dental Photography device. The Smile Lite
MDP device was equipped with three different smartphones for photographing front teeth. Each
time the smartphones in the device were replaced, the subjects had their retractor removed from
their mouths to prevent dehydration. A total of 30 different photos in two formats (RAW and
JPEG) were made for each participante, 15 for each photo format.
All photos were imported to the computer program Adobe Photoshop Lightroom 6. All the
photos were measured two times, once with and once without special calibration using gray
card on the picture. For calibration white balance of each photo had to be carried out using the
measurement probe placed on one of four gray segments on the card while adjusting image
exposure balance by setting lightness (L*) at 75*, and a* and b* values at 0* on histogram.
Then the measurement of CIE L*a*b* values on the tooth were conducted setting the
measurement probe right in the middle of the red circle marked previously on each maxillary
right central incisor. When measuring with no calibration the measurement of CIE L*a*b*
values on the tooth were conducting immediately on the tooth, avoiding previous calibration of
the grey scale.
Results: Most CIE L*a*b* values on RAW and JPEG photographs on all three tested
smartphones in different lighting conditions were statistically significantly different (p<0.05).
The difference in most CIE L*a*b* color values between calibrated and uncalibrated
photographs on all three smartphones was statistically significant (p<0.05). CIE L*a*b* values
of calibrated and uncalibrated RAW and JPEG photos between all three tested smartphones
differed statistically significantly (F=29.780;p= 0.000). The CIE L*a*b* values on uncalibrated
RAW photos taken with an iPhone 11 Pro smartphone using a polarizing filter completely
matched the same values measured by the spectrophotometer (p>0.05).
Conclusions: Different lighting conditions, measurement procedures, and photo format in this
study influenced the CIE L*a*b* values on smartphone photos. With the limitations of this
research, it can be concluded that an uncalibrated RAW photo taken by an iPhone 11 Pro
smartphone taken with a polarizing filter on the front LED light could be used in digitally
determined tooth color under standardized conditions
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