bluuebunny/crossref_metadata_2025_split huggingface dataset:
Dentin hypersensitivity: Pre-hybridization as an alternative treatment
Authors: Pagani Clóvis , Feitosa Fernanda Alves , Esteves Stella Renata Machado Silva , De Miranda Geraldo Marques , Antunes Débora Pinto , De Carvalho Rodrigo Furtado 
Published: May 2015

A hipersensibilidade dentinária pode ocorrer quando há exposição da dentina após preparos dentários para restaurações indiretas. Para evitar ou minimizar desconfortos pós-operatórios, os adesivos dentinários têm sido utilizados para proteger a dentina exposta. Esta técnica é denominada pré-hibridização. Apesar da utilização clínica, ainda existem controvérsias sobre a eficácia, o material e o protocolo mais adequado para realizá-la. Esta revisão tem como objetivo discutir os conceitos que envolvem a pré-hibridização, baseando-se nos artigos mais relevantes publicados (2002 até a data atual), indexados nas bases de dados da SciELO, MEDLINE e Pubmed. Para a pesquisa foram utilizadas as seguintes palavras-chave: pré-hibridização, hipersensibilidade dental e variáveis (ex.: pré-hibridização dentinária, hipersensibilidade dentinária, tratamento de hipersensibilidade). Foram selecionadas as referências do tipo revisão e artigos de pesquisa originais. Foram feitos esforços para identificar estudos sobre tratamentos clínicos comparativos, controlados e estudos de meta-análise sobre a hipersensibilidade e a pré-hibridização dentinária. Baseado na revisão realizada é possível destacar os adesivos autocondicionantes como a primeira escolha para os procedimentos de pré-hibridização. Porém, a literatura ainda não apresenta um protocolo consolidado e as pesquisas clínicas que estudam a eficiência desta técnica são limitadas.
Pleomorphic Adenoma versus Basal Cell Adenoma: An immunohistochemical analysis with b-catenin
Authors: Prado Renata Falchete do , Cardoso Camila Lopes , Consolaro Alberto , Taveira Antonio Luis Assis 
Published: May 2015

The objective of this study was to investigate the distribution of b-catenin in pleomorphic adenomas and the basal cell adenomas to clarify its possible role in the etiopathogenesis of these two lesions. The expression of b-catenin (BD Transduction Laboratories) was analyzed by immunohistochemistry in formalin-fixed, paraffin-embedded specimens by the avidin-biotin-peroxidase complex method in 10 pleomorphic adenomas and 2 basal cell adenomas. The specimens were analyzed taking into account intensity, distribution and association with myoepithelial cells. The results showed that all cases of pleomorphic adenomas exhibited membranous and cytoplasmic immunostaining and the 2 cases of basal cell adenomas displayed nuclear staining. Higher b-catenin index rates were seen mainly in ductal structures of pleomorphic adenomas and in the nuclei of myoepithelial stromal and myoepithelial cells of solid clusters in basal cell adenomas. In conclusion, this immunohistochemical study may suggests the different degree of differentiation of the myoepithelial cells in these two tumors.
Effect of different light-curing techniques on hardness of a microhybrid dental composite resin
Authors: Rastelli Alessandra Nara de Souza , Navarro Ricardo Scarparo , Saad José Roberto Cury , De Andrade Marcelo Ferrarezi , Bagnato Vanderlei Salvador 
Published: May 2015

Objective: This study assessed the Vickers hardness provided by two LCUs when using (1) direct and indirect light-curing techniques, (2) 40 and 60 seconds and (3) top and bottom surfaces. Material and Methods: One halogen Curing Light 2500 (3M Espe) and one LED (MM Optics) were used by direct and indirect (0, 1.0, 2.0 and 3.0 mm of dental structure) techniques during 40 and 60 seconds. The samples were made with FiltekTM Z250 in a metallic mould with a central orifice (4 mm in diameter, 2 mm in thickness). The samples were stored in dry mean by ± 24 hours and the hardness measurements were performed in a testing machine (Buehler MMT-3 digital microhardness tester Lake Bluff, Illinois USA). A 50 gf load was used and the indenter with a dwell time of 30 seconds. The data were submitted to multiple ANOVA and Newman-Keuls‘s test (p<0.05). Results: Halogen LCU exhibited higher Vickers hardness values than LED mainly because of the power density used. Hardness values were influenced by LCUs, light-curing techniques, irradiation times and surfaces. For both LCUs, hardness values were found to decrease with indirect light-curing technique, mainly for the bottom surface. Samples irradiated for 60 s exhibited higher hardness values when the halogen LCU was used. For 60 seconds, the VHN values were statistically significant greater than 40 seconds. Significant differences in top and bottom surfaces Vickers hardness number (VHN) values were observed among different LCUs used 40 and 60 seconds. Conclusion: The LCUs, light-curing techniques, variations of irradiation times, and surfaces (top and bottom) influence the composite hardness. Keywords: Composite resin, LED, Halogen lamp, Hardness, Photo-activation.
Time and sequence of eruption of primary teeth in relation to breastfeeding in sudanese children
Authors: Affan Amal Abu , Eid Enaam A. 
Published: May 2015

Background: The eruption age at which the deciduous teeth start appearing in the oral cavity has been of great significance and interest to investigators and parents mainly due to its relation to the growth and development of the child. Objectives: To determine the mean eruption time and sequence of primary dentition among a sample of Sudanese children in Khartoum localities and to investigate the effect of gender and breastfeeding pattern on the timing and sequence of eruption. Materials and Methods: Random sample of 563 Sudanese children (283 boys and 280 girls) age 4-40 months were clinically examined and inspected for the eruption of primary teeth. The age of eruption of the teeth was estimated using Probit regression. Results: All the primary teeth erupted earlier in boys than in girls except the first primary molars. The first primary teeth to erupt were the mandibular central incisors at the mean age of 8.02 ± 3.28 months. No significant difference was found in the eruption time between right and left sides of jaws as well as between children with exclusive breastfeeding and non exclusive breastfeeding.Keywords: Eruption time; Primary teeth; Lower incisors; Deciduous molars.
A descriptive study to determine the knowledge and practices related to tobacco cessation among clinicians attached to dental colleges in Bangalore City, India
Authors: Murthy Naveen Narasimha , Vanishree N. 
Published: May 2015

Objective: Tobacco use cessation is critical in reducing the effect of a major factor for both oral & systemic diseases. Its use continues to be the leading cause of preventable death worldwide with India accounting for probably a large chunk of these, due to its acceptance, both culturally and traditionally. Smoke and smokeless form of tobacco has become steady companion of today’s youth in India. Material and Methods: A descriptive cross-sectional study was conducted to assess the knowledge and practices related to tobacco cessation among practicing dentists a sample size of 366 with inclusion and exclusion criteria attached to various dental colleges in Bangalore city. Results: Comparison of knowledge and practice among qualifications revealed that the knowledge score was more among the MDS professionals with a mean value of 78.3±7.9 and the practice score was also higher among the same with a mean value of 33.3±9. Comparison based on duration of practice revealed that the knowledge score was higher in dentists with experience of 0-5 years by a mean value of 78.4±7.5 and a higher practice score was found in dentists with an experience of 6-8 years with a mean value of 33.5±8.4. Conclusion: Physicians and health care providers in association with their national medical and health professional associations must play a leading role in advocating for the implementation of a comprehensive tobacco control policy and implementation of tobacco cessation methods should be included in the dental curriculum.
Cephalometric evaluation of preoperative incisor inclination in patients with class ii dentofacial deformities treated with mandibular advancement
Authors: Gonçalves Gabriela Mayrink , Moreira Roger William Fernandes , Marotta Araujo Marcelo 
Published: May 2015

ABSTRACTObjective: To evaluate cephalometrically the preoperative incisor inclination of 30 patients with Class II malocclusion, who were treated with mandibular advancement. Materials and Methods: Thirty immediate preoperative lateral cephalograms were photographed to be used in Dolphin Imaging Software. Linear and angular measurements were traced and analyzed. Each tracing was repeated twice with 1-week interval by the same operator. The measures were tabulated at Microsoft Excel and submitted to Student’s-t test and mean measures were compared with the normal values. The intraclass correlator coefficient was used to test the intraexaminer reliability. Results: The intraclass correlation coefficient was >0.9 and it featured a high reliability. Mean values of lower incisors differed from normal values, presenting labial inclination compared to normal values. Conclusion: In this study, the results showed that Class II patients that will be submitted a mandibular advancement (orthognathic surgery) had dental compensations and the lower incisors are more proclined comparing to the standard values. Keywords: Orthognathic surgery; Orthodontics; Cephalometry.
“Talk of contracts”: Gift-giving vs. Reciprocity in James Joyce’s “A Mother”
Authors: Raghinaru Camelia 
Published: May 2015

Abstract
This essay measures the extent to which gift-giving fails in an economy of reciprocity. Reading James Joyce’s story “A Mother” in terms of Derrida’s notion of the gift as “absolute loss,” I consider the implications of an economy of loss for Joyce’s notion of sacrifice. Thus, I argue that the absence of an economy of sacrifice integrating “absolute loss” engenders the zero-sum game at the heart of Dubliners. I depart from other readings of the short story in the context of an economy based on the ideal of balanced reciprocity, since these versions deny the pure gratuity of gift in its connotations of sacrifice and loss. While such theories form a good starting point for analyzing the “moral economy” of Dubliners, they tend to overlook the fact that the only means to counteract the paralysis resulting from reciprocity is through the suspension of the economy of exchange.
Performing Arabness in Arab American Stand-up Comedy
Authors: Fouad Selim Yasser 
Published: May 2015

Abstract
This article deals with the dramatic art of stand-up comedy. It locates Arab American stand-up comedy within a broader American humorous tradition and investigates the way Arab American performers use this art to negotiate and (re)construct their identity. The main question in this article is the way Arab American stand-up comedians define their relationship to the Arab and the western worlds in the process of establishing their Arab American identity. Three humor theories - the relief theory, the incongruity theory, and the superiority theory - are deployed in the study to examine the representation of Arabness in selected Arab American performances. The study argues that Arab American comics minstrelize their own diasporic origin through reinscribing a range of orientalizing practices in order to claim their Americanness.
Changes in Heart Rate Variability and Complexity in Young Patients with Type 1 Diabetes Mellitus after A 17 Month Follow-Up
Authors: Lazarova Z. , Turianikova Z. , Tonhajzerova I. , Chromá O. , Javorka K. , Javorka M. 
Published: May 2015

Abstract
The objective of this study was to investigate short-term changes in cardiovascular autonomic dysregulation in young patients with Type 1 diabetes mellitus (DM).
Repeated analysis of spontaneous heart rate oscillations (heart rate variability - HRV) was conducted at baseline and after a follow-up period of 17 month. R-R intervals were recorded over 1h in the supine position and heart rate signal was quantified using standard time and frequency domain and short-term complexity measures.
During the follow-up measurement the low frequency oscillations of heart rate were significantly elevated (p = 0.03) and sample entropy values reduced (p = 0.03) compared with the baseline measurement. HRV measures were significantly negatively correlated with the duration of DM.
In conclusion, the data indicate that cardiovascular autonomic neuropathy progresses in relatively short time frames and depends on the duration of DM. Its progression is associated with glycemic control. Complexity and variability analyses of heart rate provide a sensitive tool for the detection and follow-up of cardiovascular autonomic dysregulation in patients with Type 1 diabetes mellitus.
Generalized control with compact support for systems with distributed parameters
Authors: Khurshudyan Asatur ZH. 
Published: May 2015

Abstract
We propose a generalization of the Butkovskiy's method of control with compact support [1] allowing to derive exact controllability conditions and construct explicit solutions in control problems for systems with distributed parameters. The idea is the introduction of a new state function which is supported in considered bounded time interval and coincides with the original one therein. By means of techniques of the distributions theory the problem is reduced to an interpolation problem for Fourier image of unknown function or to corresponding system of integral equalities. Treating it as infinite dimensional problem of moments, its L1, L2 and L∞-optimal solutions are constructed explicitly. The technique is explained for semilinear wave equation with distributed and boundary controls. Particular cases are discussed.
Application of descriptor approaches in design of PD observer-based actuator fault estimation
Authors: Filasová Anna , Krokavec Dušan , Serbák Vladimír 
Published: May 2015

Abstract
Stability analysis and design for continuous-time proportional plus derivative state observers is presented in the paper with the goal to establish the system state and actuator fault estimation. Design problem accounts a descriptor principle formulation for non-descriptor systems, guaranteing asymptotic convergence both the state observer error as fault estimate error. Presented in the sense of the second Lyapunov method, an associated structure of linear matrix inequalities is outlined to possess parameter existence of the proposed estimator structure. The obtained design conditions are verified by simulation using a numerical illustrative example.
FPGA-based Accelerators for Parallel Data Sort
Authors: Sklyarov Valery , Skliarova Iouliia , Sudnitson Alexander 
Published: May 2015

Abstract
The paper is dedicated to parallel data sort based on sorting networks. The proposed methods and circuits have the following characteristics: 1) using two-level parallel comparators in even-odd transition networks with feedback to a register keeping input/intermediate data; 2) parallel merging of many sorted sequences; 3) using even-odd transition networks built from other sorting networks; 4) rational reuse of comparators in different types of networks, namely even-odd transition and for discovering maximum/minimum values. The experiments in FPGA, which were done for up to 16×220 32-bit data items, demonstrate very good results (as fast as 3-5 ns per data item).
Analysis of the Usage of Magnetic Force-directed Approach and Visual Techniques for Interactive Context-based Drawing of Multi-attributed Graphs
Authors: Zabiniako Vitaly , Rusakov Pavel 
Published: May 2015

Abstract
In this article, the authors perform an analysis in order to assess adaptation of magnetic force-directed algorithms for context-based information extraction from multi-attributed graphs during visualization sessions. Theoretic standings behind magnetic force-directed approach are stated together with review on how particular features of respective algorithms in combination with appropriate visual techniques are especially suitable for improved processing and presenting of knowledge that is captured in form of graphs. The complexity of retrieving multi-attributed information within the proposed approach is handled with dedicated tools, such as selective attraction of nodes to MFE (Magnetic Force Emitter) based on search criteria, localization of POI (Point of Interest) regions, graph node anchoring, etc. Implicit compatibility of aforementioned tools with interactive nature of data exploration is distinguished. Description of case study, based on bibliometric network analysis is given, which is followed by the review of existing related works in this field. Conclusions are made and further studies in the field of visualization of multi-attributed graphs are defined.
Modelling and performance analysis of dual-channel switched reluctance motor
Authors: Bogusz Piotr , Korkosz Mariusz , Prokop Jan 
Published: May 2015

Abstract
The paper is a presentation of an analysis concerning performance of a 12/8 dual-channel switched reluctance motor (DCSRM). Formulas constituting a base for a non-linear mathematical model of DCSRM are presented. Simulation and laboratory tests were carried out for the motor operating in the dual-channel and single-channel mode. The results of the field theory-based calculations are presented in the form of fluxes in individual phases expressed as functions of currents and a rotor position angle. The results of the computer simulations are shown as the static characteristics of fluxes and the torque as well as voltage, current, and torque waveforms. The results of the laboratory tests are also presented.
Corrosion Behaviour of Low-Alloyed Cast Steel in Diverse State
Authors: Kondracki M. , Studnicki A. , Szajnar J. 
Published: May 2015

Abstract
In the paper the results and analysis of corrosion tests were presented for low-alloyed cast steel in as-cast state and after heat treatment operations. Such alloys are applied for heavy loaded parts manufacturing, especially for mining industry. The corrosion test were performed in conditions of high salinity, similar to those occurring during the coal mining. The results have shown, that small changes in chemical composition and the heat treatment influence significantly the corrosion behaviour of studied low-alloyed cast steels.
Characteristics of Graphite Precipitates in Aluminium Cast Iron Treated with Cerium Mixture
Authors: Soiński M. S. , Jakubus A. , Skurka K. 
Published: May 2015

Abstract
The work determined the influence of aluminium in the amount from about 1% to about 7% on the graphite precipitates in cast iron with relatively high silicon content (3.4% to 3.90%) and low manganese content (about 0.1%). The cast iron was spheroidized with cerium mixture and graphitized with ferrosilicon. The performed treatment resulted in occurring of compact graphite precipitates, mainly nodular and vermicular, of various size. The following parameters were determined: the area percentage occupied by graphite, perimeters of graphite precipitates per unit area, and the number of graphite precipitates per unit area. The examinations were performed by means of computer image analyser, taking into account four classes of shape factor. It was found that as the aluminium content in cast iron increases from about 1.1% to about 3.4%, the number of graphite precipitates rises from about 700 to about 1000 per square mm. For higher Al content (4.2% to 6.8%) this number falls within the range of 1300 - 1500 precipitates/mm2. The degree of cast iron spheroidization increases with an increase in aluminium content within the examined range, though when Al content exceeds about 2.8%, the area occupied by graphite decreases. The average size of graphite precipitates is equal to 11-15 μm in cast iron containing aluminium in the quantity from about 1.1% to about 3.4%, and for higher Al content it decreases to about 6 μm.
Structure of AlSi20 Alloy in Heat Treated Die Casting
Authors: Władysiak R. , Kozuń A. 
Published: May 2015

Abstract
The work is a continuation of research on the use of water mist cooling in order to increase efficiency of die-casting aluminum alloys using multipoint water mist cooling system. The paper presents results of investigation on crystallization process and microstructure of synthetic hypereutectic AlSi20 alloy. Casts were made in permanent mold cooled a with water mist stream. The study was conducted for unmodified AlSi20 alloy and a modified one with phosphorus, titanium and boron on the research station allowing sequential multipoint cooling using a dedicated program of computer control. The study demonstrated that the use of mold cooled with water mist stream and solution heat treatment allows in wide range for the formation of the microstructure of hypereutectic silumins. It leads to the growth of microstructure refinement and spheroidizing of phases in the casting.
Wybrane Aspekty Zużywania Się Połączeń Wpustowych I Wielowypustowych W Procesie Eksploatacji
Authors: Gębura Andrzej , Szymczak Janusz 
Published: May 2015

Abstract
W artykule przedstawiono wybrane wady połączeń wielowypustowych: mimośrodowości, przekoszenia, zwiększonych luzów. Przedstawiono znaczenie tych wad dla poprawności funkcjonowania całego zespołu napędowego. Zaprezentowano swoisty katalog tych wad w formie: wizualnego zużycia, pomiarów mechanicznych płaszczyzn przyporu, opisu matematycznego przebiegów dynamiki ruchu takiego połączenia, zobrazowań dla metod FAM-C i FDM-A. Zaznaczono skutki długotrwałej eksploatacji połączeń wielowypustowych o nadmiernym zużyciu dla bezpieczeństwa latania
Signatures of Late Neoproterozoic Gondwana assembly and Maronian glaciation in Lesser Himalaya: a palaeogeographical and stratigraphical approach
Authors: Umar Muhammad , Betts Peter , Saud Khan Malik Muhammad , Amjad Sabir Muhammad , Farooq Muhammad , Zeb Asif , Khan Jadoon Umair , Ali Shoaib 
Published: May 2015

Abstract
Stratigraphical and sedimentological analyses of Late Neoproterozoic successions in Lesser Himalaya are combined herein with palaeogeographical considerations and comparisons with equivalent successions in India and South China. The succession starts with the Hazara Formation, which contains complete and incomplete Bouma sequences suggesting its deposition in deep marine turbidite settings. The overlying Tanawal Formation, rich in massive sandstone, shale and siltstone, was deposited in shallow marine conditions, as indicated by the presence of parallel lamination, large scale tabular, trough cross- and hummocky cross-stratifications. The Tanawal Formation facies shift laterally from proximal (south-southeast) to distal (north-northwest). The glaciogenic Tanaki Boulder Bed, overlying the Tanawal Formation, was deposited during the Maronian glaciation. It is equivalent to the Blaini Formation of India, and to the Sinian diamictites of South China. The Abbottabad Formation of Cambrian age overlies the Tanaki Boulder Bed, and is composed of dolomite, chert nodules and phosphate-rich packages; similar successions are documented in India and South China at the same stratigraphical interval. The similarities of the Neoproterozoic successions of Lesser Himalaya (both in Pakistan and India) and South China suggests their possible proximity during the break-up of Rodinia and the assembly of the Gondwana Supercontinent.