51 research outputs found
Primena informaciono-komunikacionih tehnologija u Biblioteci Arhitektonskog fakulteta u Beogradu - Danica Radovanovic
No full textAccelerating developement of Information-Communication Technologies (ICTs) in the last decade, has been influencing on the usage of some internet services (www, mailing lists, discussion groups) and has broaden their scope from academic surroundings on educational-information centers - libraries. Library of Faculty of Architecture has started from the May 2000, to apply and use some of the internet services in purpose of education and animation of their users. This paper describes experience of one academic library in bringing in and applying modern technologies through selective structuring and difusion of information, as well as action of animation users with aim of expanding, inducing digital and information literacy. Therefore, coordinator and author of the project ArchiWeb has put in a small questionnaire , a poll among the users in purpose to understand their need and improving the work of the service
with histological assessment
No full textOBJECTIVE
To assess the peri-implant soft tissue profiles between argon plasma treatment (PT) and non-treated (NPT) healing abutments by comparing clinical and histological parameters 2 months following abutment placement.
MATERIALS AND METHODS
Thirty participants were randomly assigned to argon-plasma treatment abutments group (PT) or non-treated abutments (NPT) group. Two months after healing abutment placement, soft peri-implant tissues and abutment were harvested, and histological and clinical parameters including plaque index, bleeding on probing, and keratinized mucosa diameter (KM) were assessed. Specialized stainings (hematoxylin-eosin and picrocirious red) coupled with immunohistochemistry (vimentin, collagen, and CK10) were performed to assess soft tissue inflammation and healing, and the collagen content keratinization. In addition to standard statistical methods, machine learning algorithms were applied for advanced soft tissue profiling between the test and control groups.
RESULTS
PT group showed lower plaque accumulation and inflammation grade (6.71% vs. 13.25%, respectively; p-value 0.02), and more advanced connective tissue healing and integration compared to NPT (31.77% vs. 23.3%, respectively; p = 0.009). In the control group, more expressed keratinization was found compared to the PT group, showing significantly higher CK10 (>47.5%). No differences in KM were found between the groups.
SIGNIFICANCE
PT seems to be a promising protocol for guided peri-implant soft tissue morphogenesis reducing plaque accumulation and inflammation, and stimulating collagen and soft tissue but without effects on epithelial tissues and keratinization
Effect of argon plasma abutment activation on soft tissue healing: RCT with histological assessment
No full textFine Art of Blogging - Belgrade and Beyond
No full textAs information management professional, and person that beside everyday work is involved into blogging, human-computer interaction, online communities, blogosphere, web activism, this is my short para-blog essay.
Why am I blogging? Not only because of great freedom of creative expression, but also because of the concept of hyperlinking with other professionals in my own pool and with others in blogosphere, communication, commenting, learning about new things (educational role), exchanging ideas, data.
Author of Belgrade and Beyond (in English)- http://danicar.wordpress.com
Author of science blog (in Serbian) for eConsortia KoBSON-
http://kobson.wordpress.co
Diagnostic value of VEGF in peri-implantitis and its correlation with titanium particles: A controlled clinical study
No full textOBJECTIVES
VEGF is prototypic marker of neovascularization, repeatedly proposed as intrinsic characteristic of peri-implantitis. This study aimed to assess pattern of VEGF in peri-implantitis, its correlation with titanium particles (TPs) and capacity as respective biomarker.
MATERIAL AND METHODS
Pathological specificity of VEGF was assessed in peri-implant granulations using immunohistochemistry, periodontal granulations represented Ti-free positive controls. VEGF was correlated to TPs, identified using scanning electron microscopy coupled with dispersive x-ray spectrometry. Diagnostic accuracy, sensitivity and specificity of VEGF were estimated in PICF specimens from peri-implantitis, peri-implant mucositis (PIM) and healthy peri-implant tissues (HI) using machine learning algorithms.
RESULTS
Peri-implantitis exhibited rich neovascular network with expressed density in contact zones toward neutrophil infiltrates without specific pattern variations around TPs, identified in all peri-implantitis specimens (mean particle size 8.9 ± 24.8 µm2; Ti-mass (%) 0.380 ± 0.163). VEGF was significantly more expressed in peri-implantitis (47,065 ± 24.2) compared to periodontitis (31,14 ± 9.15), and positively correlated with its soluble concentrations in PICF (p = 0.01). VEGF was positively correlated to all clinical endpoints and significantly increased in peri-implantitis compared to both PIM and HI, but despite high specificity (96%), its overall diagnostic capacity was average. Two patient clusters were identified in peri-implantitis, one with 8-fold higher VEGF values compared to HI, and second with lower values comparable to PIM.
SIGNIFICANCE
VEGF accurately reflects neovascularization in peri-implantitis that was expressed in contact zones toward implant surface without specific histopathological patter variation around TPs. VEGF answered requests for biomarker of peri-implantitis but further research is necessary to decrypt its exact underlying cause
Internet paradigma, struktura i dinamika onlajn društvenih mreža: Fejsbuk i mladi u Srbiji
No full textThis research presents an overview of social networking sites as a connecting tool for communication and collaboration, as well as their influence in the networked public sphere in everyday life. By considerating the definition, history and structure of selected Web 2.0 social media services, the author gives a preview for understanding why these sites, especially Facebook, are so popular among Serbian young adults. Finally, using Web sphere analysis and desktop based methodology, Web observations, numerous interviews with young adults in Serbia, and semi-structured interviews, some relevant conclusions have been drawn for better understanding of the dynamics of the usage social network sites in the Balkan region
Open knowledge and education at the new level of web paradigm
No full textAs www, and now web 2.0 is growing by the second, it gives us new possibilities of pedagogical forms, and the main following outcomes: resources, implementation, usage, practice. We will re-evaluate and examine new forms of social networking - theoretical and practical knowledge in academia and science: from implemetation of web roots practice, listservs, eBoards, eZines (alternative art and education forms –then), the usage of eResources in academia, education profession to the wider audience: using larger online open archives, Consortias, digital libraries, repositories, to online social networking applications, science and education blogs.
Author uses and presents data from her Master research paper with relevant results about the usage of the precious online resources, electronic publishing materials within Consortia (that are available in science institutions, academia and libraries). More than thousands and thousands available resources are not used because of many factors that the author explained in one of the chapters in master paper. As indicated in outlines, e-tensions play themselves differently in various institutional geographies. Author took empirical research on three geographic points: USA, Europe (UK and Nederlands) and Serbia.
The Scopes are two paradigms: human factor and digital media educational tools (human-computer interaction and its social impacts), that we use in education systems and professional practice. For the first one is indicated open source educational software, applications and tools for giving information and knowledge. We will also give a short notice on the interest and the usage of the aimed groups of those possiblities (at classes, lectures). For the second, in professional practice we will see how those social knowledge tools have impact on larger science commnity groups (science, educational institutes and institutions) as well as the outcome-feedback.
The point will be given on interaction in open knowledge and education, as well as the notice to the audience of the recent exemplar of implementation of social, interactive knowledge into professional practice and educational system - the concept of web of science which founder is the father of World Wide Web Tim Berners- Lee
Decision making with fair ranking
No full textAbstract and Figures
Ranking is a responsible process because it involves working with sensitive attributes that can discriminate alternatives. Due to the availability of a large amount of data for automated processing, ranking is increasingly in use in decision making. Therefore, concepts of algorithmic fairness in the field of classification in machine learning find their place in fair ranking methods. This paper provides an overview of fair ranking terms, fair ranking challenges, and fair ranking algorithms from the state-of-the-art literature
How frequent does peri-implantitis occur? A systematic review and meta-analysis
No full textInternational audienceObjectives : The objective of this study is to estimate the overall prevalence of peri-implantitis (PI) and the effect of different study designs, function times, and implant surfaces on prevalence rate reported by the studies adhering to the case definition of Sanz & Chapple 2012.Material and methods: Following electronic and manual searches of the literature published up to February 2016, data wereextracted from the studies fitting the study criteria. Meta-analysis was performed for estimation of overall prevalence of PI while the effects of the study design, function time, and implant surface type on prevalence rate were investigated using meta-regression method.Results : Twenty-nine articles were included in this study. The prevalence rate in all subset meta-analyses was always higher at patient level when compared to the prevalence rate at the implant level. Prevalence of PI was 18.5% at the patient level and 12.8% at the implant level. Meta-regression analysis did not identify any association for different study designs and function times while it was demonstrated the significant association between moderately rough surfaces with lower prevalence rate of PI (p=0.011).Conclusions : The prevalence rate of PI remains highly variable even following restriction to the clinical case definition and itseems to be affected by local factors such as implant surface characteristics. The identification of adjuvant diagnostic markers seems necessary for more accurate disease classification.Clinical relevance : The occurrence of PI is affected by local factors such as implant surface characteristics hence the carefulassessment of the local factors should be performed within treatment planning
Distinguishing predictive profiles for patient-based risk assessment and diagnostics of plaque induced, surgically and prosthetically triggered peri-implantitis
No full textObjective: To investigate whether specific predictive profiles for patient-based risk assessment/diagnostics can be applied in different subtypes of peri-implantitis. Materials and methods: This study included patients with at least two implants (one or more presenting signs of peri-implantitis). Anamnestic, clinical, and implant-related parameters were collected and scored into a single database. Dental implant was chosen as the unit of analysis, and a complete screening protocol was established. The implants affected by peri-implantitis were then clustered into three subtypes in relation to the identified triggering factor: purely plaque-induced or prosthetically or surgically triggered peri-implantitis. Statistical analyses were performed to compare the characteristics and risk factors between peri-implantitis and healthy implants, as well as to compare clinical parameters and distribution of risk factors between plaque, prosthetically and surgically triggered peri-implantitis. The predictive profiles for subtypes of peri-implantitis were estimated using data mining tools including regression methods and C4.5 decision trees. Results: A total of 926 patients previously treated with 2812 dental implants were screened for eligibility. Fifty-six patients (6.04%) with 332 implants (4.44%) met the study criteria. Data from 125 peri-implantitis and 207 healthy implants were therefore analyzed and included in the statistical analysis. Within peri-implantitis group, 51 were classified as surgically triggered (40.8%), 38 as prosthetically triggered (30.4%), and 36 as plaque-induced (28.8%) peri-implantitis. For peri-implantitis, 51 were associated with surgical risk factor (40.8%), 38 with prosthetic risk factor (30.4%), 36 with purely plaque-induced risk factor (28.8%). The variables identified as predictors of peri-implantitis were female sex (OR = 1.60), malpositioning (OR = 48.2), overloading (OR = 18.70), and bone reconstruction (OR = 2.35). The predictive model showed 82.35% of accuracy and identified distinguishing predictive profiles for plaque, prosthetically and surgically triggered peri-implantitis. The model was in accordance with the results of risk analysis being the external validation for model accuracy. Conclusions: It can be concluded that plaque induced and prosthetically and surgically triggered peri-implantitis are different entities associated with distinguishing predictive profiles; hence, the appropriate causal treatment approach remains necessary. The advanced data mining model developed in this study seems to be a promising tool for diagnostics of peri-implantitis subtypes
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