bluuebunny/crossref_metadata_2025 huggingface dataset:
About scarce resources allocation in conditions of incomplete information
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Dodonova Natalya L. , Kuznetsova Olga A. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

The article examines the problem of the efficient allocation of resources in conditions of incomplete information concerning the parameters of agents’ utility functions. Through business game the results are modeled and compared in conditions of incomplete information concerning the agents’ utility functions.We experimentally prove the inexpediency of information distortion of the agents’ effectiveness when using a nonmanipulative distribution mechanism in a multi-step game.
A model of milling process based on Morlet wavelets decomposition of vibroacoustic signals
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Khaymovich Alexandr I. , Prokhorov Sergey А. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Stolbova Anastasia А. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Kondratyev Alexandr I. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

The paper considers the problem of online monitoring the condition of cutting tools to avoid its unexpected failure. To approach this problem we proposed a model of milling process based on Morlet decomposition of vibroacoustic signals. In addition, using the wavelets scalogram, we imposed a new condition that helps to improve early wear detection of the cutting tool. The findings of this research reveal the advantages of the proposed model compared to the previously reported models that rely on Haar wavelets and Short-time Fourier transform.
A discrete phase problem in reconstruction of signals in space-rocket hardware
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Kuleshova Antonina А. , Shchelokov Evgeny A. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

Reconstruction of information hidden in vector signal phases does not lose its relevance. Sets of vectors, called frames, in a space can be used for theoretical research of phase retrieval. The article shows that phase retrieval is equivalent to phaseless reconstruction. Examples are considered in for which sets of vectors that simultaneously carry out phase retrieval and phaseless reconstruction are constructed.
Calculation of critical conditions for the filtration combustion model
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Vidilina Olga , Shchepakina Elena ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

The paper is devoted to the study of the dynamic model of the autocatalytic combustion reaction in an inert medium with partial heat removal from the reaction phase to the environment. We pay particular attention to modelling of the critical regime, which is a kind of a watershed between the slow burning regimes and explosion modes. New algorithm for computing a critical value of the control parameter is presented.
Mathematical modeling radio tomographic ionospheric parameters reconstruction via nanosatellites constellation for conditions of incomplete source data
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Phylonin Oleg V. , Nikolaev Peter N. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

The results of mathematical simulation of the formation of initial projection data for the problems of radio-tomography of the ionosphere using navigation satellites GPS and constellation of low earth orbit nanosatellites are presented. It is shown that for ring carriers (spherical layers), in the incompleteness of chordal data, the problems of reconstructing the electron density can be reduced to problems of low-angle tomography and the use of high-speed FBP algorithms.
Server hardware resources optimization for virtual desktop infrastructure implementation
Authors:   Voronezh State Technical University, 20 let Oktyabrya str., 84, 394006, Voronezh, Russia, Makoviy Katerina , Proskurin Dmitry ,   Voronezh State Technical University, 20 let Oktyabrya str., 84, 394006, Voronezh, Russia, Khitskova Yulija ,   Voronezh State Technical University, 20 let Oktyabrya str., 84, 394006, Voronezh, Russia, Metelkin Yaroslav ,   Voronezh State Technical University, 20 let Oktyabrya str., 84, 394006, Voronezh, Russia
Published: September 2017

A new model of capacity planning problem applied to Virtual Desktop Infrastructure implementation is proposed. The possibility of applying the methods of integer mathematical programming to the problem of optimizing server set providing the predetermined number of virtual machines operating.
On delayed loss of stability in one mechanical problem
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Shchetinina Ekaterina V.
Published: September 2017

Consider a double pendulum under the external force. This model can be described by the multi-speed systems of ordinary differential equations. We study the existence of stable motions depending on the parameters of the system and on the value of the external force. Critical values of the parameters are defined.
Characteristics comparison of DTN networks routing protocols using hybrid model of nodes’ mobility
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Tsarev Aleksandr A. , Privalov Alexander Yu. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

The results of simulation of popular routing protocols in DTN wireless networks with the hybrid mobility model of DTN’s nodes are presented. The purpose was to evaluate the message delivery probability and the average time of message delivery. The simulation model is implemented in the OMNeT ++ simulation system. From the simulation experiments it has been found that the daily periodic repeatability of node’s movements has a sufficient influence on the performance of routing protocols with different principles of route determination.
Cellular automata-based model of group motion of agents with memory and related continuous model
Authors:   Voronezh State University, 1 Universitetskaya pl., Voronezh, 394018, Russia, Kuznetsov Alexander V.
Published: September 2017

The paper describes the construction of the motion and interaction model for agents with memory. Agents move on the landscape consisting of squares with different passability. We briefly characterize the cellular automata-based model with one common to all agents layer corresponding to the landscape and many agent-specific layers corresponding to an agent’s memory. Also, we develop methods for the random landscape generation and the simulation of a communication system. Finally, we study a connection between the discrete agent motion model and the continuous concentration law for the system of agents.
Stochastic Non-Markovian Schroedinger equation for a three-level quantum system
Authors:   Samara National Research University, 34, Moskovskoye shosse, 443086, Samara, Russia, Semin Vitalii , Pavelev Andrei ,   Samara National Research University, 34, Moskovskoye shosse, 443086, Samara, Russia
Published: September 2017

Non-Markovian dynamics of a three-level system is studied with the help of stochastic Schrodinger equation (SSE). We derive a new form of SSE for a three-level system driven by four independent Ornstein-Uhlenbeck stochastic noises. The main advantage of the suggested SSE is the ensuring of the complete positivity of the reduced density operator. We demonstrate significant influence of the non-Markovian noises on the dynamics of the three-level quantum system.
Numerical simulations of the quantum systems dynamics in the path integral approach
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Biryukov Alexander , Shleenkov Mark ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

We study the dynamics of quantum system interacting with electromagnetic field. We present density matrix and transition probability as a path integrals in energy state space without resonance and rotating wave approxinations. By the use of obrained equations we develop an algorithm for numerical simulations of the dynamics of quantum system interacting with electromagnetic field. Using this approach we consider rotational dynamics of nitrogen molecules 14N2 and 15N2 which interact with a sequence of ultrashort laser pulses. Our computer simulations indicate the complex dependency of the high rotation states excitation probability upon ultrashort laser pulses sequence periods. We observe pronounced resonances, which correspond to the results of some experiments.
Nonlinear eigenvalue problems in fracture mechanics: eigenspectra and eigenfunctions
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Peksheva Anastasia A. , Stepanova Larisa V. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

The study is aimed at analytical determination of eigenfunctions of the nonlinear eigenvlaue problems following from the crack problems in power law materials under mode III loading and mixed mode (mode I and mode II) loading. The study is based on the perturbation theory technique (the small artificial parameter method) allowing us to find the analytical solution for the eigenfunctions in the closed form in the case of mode III crack problems and to derive the analytical approximations for mixed mode (Mode I and Mode II) crack problems. The method of analytical determination of eigenfunctions of the nonlinear eigenvalue problem is presented.
Probability-theoretical model for product assembly parameters assessment
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Ruzanov Nikolay V. , Bolotov Mikhil A. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Pechenin Vadim A. ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

The proposed work provides a model for estimating the assembly parameters of the products by the example of the cone ring assembly process. There was carried out the simulation of the process of parts mating along the surfaces with form deviation. As a result of Monte Carlo simulation, there were obtained statistical characteristics of the parameters of the assembled units depending on various initial positions of the parts being assembled. The proposed model could be used to assess the accuracy of the products assembled in the aircraft industry.
Reconstruction of realistic three-dimensional models of biological objects from MR-images for the radiation therapy purposes
Authors:   Saint Petersburg State University, 7/9 Universitetskaya emb., 199034, St. Petersburg, Russia, Lebedeva Anna V. , Mamontova Veronika V. ,   Saint Petersburg State University, 7/9 Universitetskaya emb., 199034, St. Petersburg, Russia, Nemnyugin Sergey A. ,   Saint Petersburg State University, 7/9 Universitetskaya emb., 199034, St. Petersburg, Russia, Komolkin Andrei V. ,   Saint Petersburg State University, 7/9 Universitetskaya emb., 199034, St. Petersburg, Russia
Published: September 2017

Magnetic Resonance Imaging (MRI) is one of the most widely used medical diagnostic techniques. Digital Imaging and COmmunications in Medicine (DICOM) is standard format to store results of MRI. In the paper methods of visualization of three-dimensional voxel models of human organs from data obtained using MRI are considered. These models may be used both in medical research and for planning of the radiation therapy treatment. The result of the work is a software package developed for medical physics research.
The method of augmented regularized normal equations for systems with sparse matrices
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Gogoleva Sofia Y.
Published: September 2017

A new approach for solving ill-posed problems is proposed. The approach makes it possible to effectively calculate normal pseudosolutions for ill-conditioned systems of linear algebraic equations and to find an acceptable solution with a minimum filling of sparse matrices.
One approach to control of a neural network with variable signal conductivity
Authors:   Railway Signalling Institute JSCo, 27 bld. 1 Nizhegorodskaya str., 109029, Moscow, Russia, Olshansky Alexey , Ignatenkov Alexander ,   Samara State Transport University, 2 V Svobody str., 443066, Samara, Russia
Published: September 2017

The article focuses on a new extent to synthesize a control strategy of learning of a special artificial neural network with variable signal conductivity and on features of neural networks with variable signal conductivity. The purpose of the research is to create a new control strategy based on analysis of the neural network error signal. Also the article contains an approach how to compute the control strategy. The main result is contained in the necessity to realize the control strategy on the basis of preliminary training of the neural network with specific techniques. Authors also suggest a technique of computing the crucial trajectory of the network’s error decreasing. The trajectory may be computed using signal processing methods.
Modeling and analysis of motion of a spacecraft with a tether aerodynamic stabilizer
Authors:   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia, Elenev Dmitrii , Zabolotnov Yuriy ,   Samara National Research University, 34 Moskovskoe Shosse, 443086, Samara, Russia
Published: September 2017

Space tether system consists of two solid bodies connected by a tether. The deployment of this system is produced mainly by aerodynamic forces which act on the bodies. One of these bodies has higher ballistic coefficient thus acting as an aerodynamic stabilizer on low orbit. Such tether systems allow to lower the requirements for characteristics of a spacecraft and can be used for purposes of stabilization in higher layers of the atmosphere, for utilization of space debris. For mathematical modeling purposes the tether is represented as a set of mathematical points with elastic connections.
Development of algorithms for diagnosing forms of lichen planus and predicting of the disease’s course
Authors:   Voronezh State Medical University, Studencheskaya, 10, 394000, Voronezh, Russia, Serikova Olga V. , Kalaev Vladislav N. ,   Voronezh State University, Universitetskaya PL. 1, 394000, Voronezh, Russia, Soboleva Natalya A. ,   Voronezh State Medical University, Studencheskaya, 10, 394000, Voronezh, Russia
Published: September 2017

The work is devoted to application of mathematical methods and development of algorithms for diagnostics of the lichen planus forms that located at mucous membrane of the mouth and lips, the differential diagnosis of severe forms of other diseases and its prediction in difficult cases through the use of expert knowledge base, the results of the selection of the most informative features and micronucleus test’s interpretation in buccal epithelium.
UMA ANÁLISE DA INTERDISCIPLINARIDADE NA DOCÊNCIA UNIVERSITÁRIA: A PERCEPÇÃO DOS PROFESSORES DA UESB
Authors: Rodrigues Andrêssa Silva , Pires Ennia Débora Passos Braga
Published: September 2017

O artigo apresenta os resultados de uma pesquisa teve como objetivo analisar a perspectiva docente sobre a contribuição da interdisciplinaridade na prática docente e na construção do conhecimento. Procurou-se averiguar o que pensam os docentes, sobre a interdisciplinaridade como fomentadora do desenvolvimento e competência docente tanto no campo do ensino quanto no campo da pesquisa; identificar a concepção dos docentes sobre a abordagem do conhecimento científico, a contextualização entre as ideias estudadas com a realidade dos discentes e a interação entre educador e educando, teoria e ação. O estudo fundamentou-se em autores contemporâneos, dentre os quais: Anastasiou (2006), Fazenda (2001; 2011), Masetto (2008), Pimenta (2000; 2008), Severino (2008) e Veiga (2006) que discutem a docência universitária. Foram entrevistados 10 (dez) professores dos cursos de Biologia, Química e Pedagogia de uma Instituição de Ensino Superior do Sudoeste da Bahia. Constatou-se que os docentes das distintas áreas do conhecimento percebem a interdisciplinaridade como uma abordagem que proporciona um ensino mais próximo da complexidade dos fatos sociais vivenciados pelos alunos, e que promove a dialogicidade entre os pares. Contudo, a pesquisa evidencia que, apesar dos docentes reconhecerem esses aspectos, a interdisciplinaridade é pouco pensada e exercida na instituição estudada. Os resultados do trabalho apontam para a necessidade de iniciativas tanto institucionais quanto pessoais quanto à formação continuada dos docentes que atuam no Ensino Superior.Palavras-chave: Formação continuada. Interdisciplinaridade. Docência Universitária.
Licenciatura em Educação do Campo com Habilitação em Artes e Música: Trajetória e Desafios na Região do Bico do Papagaio, Brasil
Authors: Silva Cícero Da , Miranda Cássia Ferreira , Cover Maciel , Bonilla Marcus Facchin , Oliveira Ubiratan Francisco de
Published: September 2017

A expansão dos Cursos Superiores de Licenciatura em Educação do Campo no Brasil teve um salto significante com a abertura do Edital 02/2012 pelo Ministério da Educação (BRASIL, 2012). Com a finalidade de formar educadores do campo nas diversas comunidades rurais do país, entre eles, professores de escolas do campo, quilombolas, pescadores, ribeirinhos, assentados/acampados da reforma agrária e lideranças dos movimentos sociais do campo, cerca de 42 (quarenta e dois) cursos de Licenciatura em Educação do Campo estão sendo implantados desde 2013 em todas as regiões do país. Este artigo objetiva apresentar um painel de informações e experiências pedagógicas do curso de Licenciatura em Educação do Campo com habilitação em Artes e Música, da Universidade Federal do Tocantins (UFT), campus de Tocantinópolis. O trabalho está dividido em três partes principais: o processo de constituição do Curso focalizado, a caracterização do mesmo, a descrição e reflexões sobre algumas das experiências pedagógicas desenvolvidas entre os anos de 2014 e 2015. Trata-se de um primeiro esforço de sistematização do grupo de docentes do curso e que compõem a pesquisa do Observatório da Educação do Campo – do Centro Transdisciplinar de Educação do Campo (CETEC), da Universidade de Brasília (UnB), cujo enfoque é a expansão dessa modalidade de ensino no Brasil.Palavras-chave: Educação do Campo. Artes. Música.
Valuación actuarial de bonos catastróficos para desastres naturales en México
Authors: Fernández-Durán Juan José , Gregorio-Domínguez M. Mercedes
Published: September 2017

México es un país donde ocurren distintos fenómenos naturales, como inundaciones, huracanes y terremotos, que pueden convertirse en desastres que requieren grandes sumas de dinero para mitigar su efecto económico en la población afectada. Generalmente, estas grandes sumas de dinero suelen ser aportadas por el gobierno federal y/o local. El objetivo del presente trabajo es el desarrollo de una metodología actuarial para el cálculo de bonos catastróficos para desastres naturales en México, de manera que, en caso de que el evento catastrófico ocurra durante la vigencia del bono, el gobierno cuente con fondos adicionales y, en caso de que no ocurra, los inversionistas que hayan comprado el bono obtengan tasas de interés superiores a la tasa libre de riesgo del mercado. Los bonos tienen la particularidad, a diferencia de bonos similares emitidos en otros países, que en caso de que ocurra el evento catastrófico el inversionista no pierde el total de su inversión sino sólo una parte o se le difiere su capital total o parte de éste a una fecha posterior a la de la finalización del contrato del bono catastrófico, esto con el fin de hacerlos más atractivos para el inversionista.
GUSTAVO A. DEL ANGEL-MOBARAK, CARLOS BAZDRESCH PARADA, FRANCISCO SUÁREZ DÁVILA (comps). Cuando el Estado se hizo banquero. Consecuencias de la nacionalización bancaria en México, Lecturas de El Trimestre Económico No. 96. Fondo de Cultura Económica, 2005, 344 pp.
Authors: Cordera Campos Rolando
Published: September 2017

El libro que presentamos contiene, aparte de una detallada introducción, que más bien es otro polémico ensayo del volumen, 21 trabajos y testimonios, un apéndice estadístico y otro documental, destinados a estudiar las causas y motivos de la nacionalización de la banca mexicana de 1982, así como sus consecuencias macro y micro económicas.
Baclofen‐induced Tourette‐like Syndrome: tics and echolalia
Authors: Yu Jessica , Ooi E‐Lin
Published: September 2017

We describe an elderly patient who developed a “Tourette like” syndrome after baclofen was administered. A total of 40 mg baclofen was administered over thirty‐six hours to relieve pain following a fall. She became unconscious and subsequently developed muscle tics and echolalia. Two days later she recovered fully and was discharged from hospital after two weeks of rehabilitation.
Employing social media websites and its role in determining the targeted audience for marketing within cloth manufacturing sector in Jordan
Authors: Allan Mahmoud , Nimer Ali Nafez
Published: September 2017

Technology and internet is taking a huge chunk of our lives. Nowadays almost every activity we do can be done through the internet. Organizations are running their business through the means of technology and internet, many successful organization are running their business and managing their marketing plans through the social media website. The current research study seeks to examine the role of employing social media in marketing to reach the targeted audience within cloth manufacturing sector in Jordan. Through employing a questionnaire and distributing it on (444) consumers from different markets, malls and commercial complexes; the results of the study indicated that trust and content are the most influential factors which enable the organization to reach its target audience. However, the study recommends to carry out a research on how an organization can increase the equity of its brand through social media.
Anodic oxidation of slaughterhouse wastewater on boron-doped diamond: process variables effect
Authors: Abdelhay Arwa , Jum'h Inshad , Abdulhay Enas , Al-Kazwini Akeel , Alzubi Mashael
Published: September 2017

A non-sacrificial boron-doped diamond electrode was prepared in the laboratory and used as a novel anode for electrochemical oxidation of poultry slaughterhouse wastewater. This wastewater poses environmental threats as it is characterized by a high content of recalcitrant organics. The influence of several process variables, applied current density, initial pH, supporting electrolyte nature, and concentration of electrocoagulant, on chemical oxygen demand (COD) removal, color removal, and turbidity removal was investigated. Results showed that raising the applied current density to 3.83 mA/cm2 has a positive effect on COD removal, color removal, and turbidity removal. These parameters increased to 100%, 90%, and 80% respectively. A low pH of 5 favored oxidants generation and consequently increased the COD removal percentage to reach 100%. Complete removal of COD had occurred in the presence of NaCl (1%) as supporting electrolyte. Na2SO4 demonstrated lower efficiency than NaCl in terms of COD removal. The COD decay kinetics follows the pseudo-first-order reaction. The simultaneous use of Na2SO4 and FeCl3 decreased the turbidity in wastewater by 98% due to electrocoagulation.
Denitrification processes and microbial communities in a sequencing batch reactor treating nanofiltration (NF) concentrate from coking wastewater
Authors: Li Enchao , Lu Shuguang
Published: September 2017

A biological denitrifying process was employed for the treatment of nanofiltration (NF) concentrate with high conductivity, which was generated from coking wastewater in a sequencing batch reactor (SBR). The results showed that the average removal efficiencies of chemical oxygen demand (COD), total nitrogen (TN) and nitrate were 47.6%, 61.1% and 94.6%, respectively. Different microbial communities were identified by sequencing the V1-V3 region of the 16S rRNA gene using the MiSeq platform, showing that the most abundant bacterial phylum in the SBR system was Proteobacteria, with the subclasses β-Proteobacteria and α-Proteobacteria being dominant. The key microorganisms responsible for denitrification belonged to the genera Thauera, Hyphomicrobium, Methyloversatilis, Hydrogenophaga, Ignavibacterium, Rubrivivax and Parvibaculum. Quantitative real-time polymerase chain reaction was used to assess the absolute abundance of microbial genera, using 16S rRNAs and denitrifying genes such as narG, nirS, nirK, nosZ, in both SBR start-up and stable operation. The abundances of narG, nirK and nosZ were lower during stable operation than those during the start-up period. The abundance of nirS at a level of 104–105copies/ng in DNA was much higher than that of nirK, thus being the dominant functional gene in nitrite reduction.
CAPOEIRA GOING GLOBAL: THE APPROPRIATION OF THE AFRO-BRAZILIAN PRACTICE THROUGH TV ADVERTISEMENTS IN FRANCE AND THE UNITED KINGDOM
Authors: Granada da Silva Ferreira Daniel
Published: September 2017

This article analyze two advertisements using capoeira narratives and seek to understand how they are constructed to sell products or ‘images’ in different national contexts. The objective is to understand the processes of adaptation of the practice of capoeira to the local market. The methodology employed was the exploratory research, with the analyses of visual narratives, research in local newspapers, multisited ethnography and free flowing interviews with capoeira practitioners in France and in the UK. The first part introduces the debate about the globalization and glocalization in the case of the capoeira. Then, are presented the studies about the transnationalization of capoeira practice and the emigration of Brazilians. Further is analyzed the advertisement of the deodorant ‘Ushuaia’ in France and the way it shows the representations of capoeira, ‘Brazil’,  ‘Brazilianess’, followed by the analyze of the BBC ‘idents’ and the debate generated by this campaign in the national medias. Through articles published in the British press, we will discuss the insertion of capoeira in British society in a context of debate regarding local multiculturalism. The conclusions point to the understanding that to be used by advertisers in different national contexts, capoeira needs to be transformed in local versions, far from its original meanings.
Implantology and Periodontal Disease: The Panacea to Problem Solving?
Authors: Matarese Giovanni , Ramaglia Luca , Fiorillo Luca , Cervino Gabriele , Lauritano Floriana , Isola Gaetano
Published: September 2017

Introduction:

The specialty of periodontology has changed dramatically in recent years. With the long-standing goal of retaining teeth in a functional and esthetical state, the periodontology has developed a high level of expertise in the regeneration of bone and connective tissues that support the teeth. However, periodontists have also joined maxillofacial surgeons as the primary providers of implant surgery.

Methods:

The tremendous innovations of periodontists induced also by the marketplace resulted in predictable periodontal treatment outcomes for most patients by the implants led to a dramatically different marketplace in which many patients with periodontitis can be treated by the implants rather than the traditional periodontal treatment.

Results:

The aim of this article is to focus on the innovator’s dilemma for periodontists today is that key elements of our rewarding contributions to dentistry in recent decades are unlikely to be part of a strong and rewarding future for the profession.

Conclusions:

With the intriguing role of the personalized medicine approach that integrates genomic and clinical information to predict a possible predisposition, we do not suggest a reduced role for periodontists in dental implant surgery but rather a more prominent role in complex cases to achieve surgical implant needs and proper reconstruction and long-term maintenance of the patient’s health.
Effect of 10% Strontium Chloride and 5% Potassium Nitrate with Fluoride on Bleached Bovine Enamel
Authors: Alencar Cristiane de Melo , Pedrinha Victor Feliz , Araújo Jesuína Lamartine Nogueira , Esteves Renata Antunes , Silva da Silveira Ana Daniela , Silva Cecy Martins
Published: September 2017

Background:

Dental whitening has been increasingly sought out to improve dental aesthetics, but may cause chemical and morphological changes in dental enamel surfaces.

Objective:

This study evaluated in vitro the effect of 10% strontium chloride and 5% potassium nitrate with fluoride on bovine enamel, through tristimulus colorimetry, Knoop microhardness (KHN), and roughness after bleaching with 35% hydrogen peroxide (HP).

Methods:

The specimens were divided into three groups (n=15): GControl received bleaching treatment with 35% HP; GNitrate received bleaching with 35% HP followed by the application of 5% potassium nitrate with 2% sodium fluoride; and GStrontium received bleaching with 35% HP followed by the application of 10% strontium chloride on the enamel. Next, five specimens of each experimental group were subjected to KHN and tristimulus colorimetry tests, and 10 specimens were subjected to surface roughness (SR) tests. The values obtained for the different groups were compared through analysis of variance (ANOVA) followed by a post-hoc Tukey-Kramer test in addition to Student’s T-test for paired data.

Results:

In the intergroup comparison, KHN final differed statistically (p<0.05). The mean SR final of the experimental groups differed statistically from the GControl group (p<0.05). In addition, the groups did not differ in color variation (p>0.05).

Conclusion:

10% strontium chloride and 5% potassium nitrate combined with 2% fluoride downplayed morphological changes to the enamel, without interfering with the effectiveness of the bleaching process.
Methodologies in Orthodontic Pain Management: A Review
Authors: Hussain Asra Sabir , Al Toubity Meteib Joraib , Elias Wael Y.
Published: September 2017

Introduction:

Patients experience pain and discomfort during active orthodontic treatment with fixed appliances. Pain is considered a subjective response to noxious stimuli. It can vary from person to person and is influenced by certain factors such as age, gender, previous pain experiences, stress or anxiety, and type of appliance.

Objective:

The objective of this literature review was to discuss conventional versus recently introduced treatment modalities used in pain management for orthodontic patients.

Discussion:

According to the reviewed articles, both pharmacological and non-pharmacological methods were introduced in orthodontic pain management. However, orthodontists must use their best professional judgment to assess each case individually and select an appropriate treatment modality based on pain threshold level of an individual.

Conclusion:

Nevertheless, further investigations are required in this field.
Physical Exam and Evaluation of the Unstable Shoulder
Authors: Valencia Mora María , Ibán Miguel Ángel Ruiz , Heredia Jorge Diaz , Gutiérrez-Gómez Juan Carlos , Diaz Raquel Ruiz , Aramberri Mikel , Cobiella Carlos
Published: September 2017

Background:

The clinical evaluation of the patient with shoulder instability can be challenging. The pathological spectrum ranges from the straightforward “recurrent anterior dislocation” patient to the overhead athlete with a painful shoulder but not clear instability episodes. Advances in shoulder arthroscopy and imaging have helped in understanding the anatomy and physiopathology of the symptoms. The aim of this general article is to summarize the main examination manoeuvres that could be included in an overall approach to a patient with a suspicion of instability.

Material and Methods:

In order to achieve the above-mentioned objective, a thorough review of the literature has been performed. Data regarding sensibility and specificity of each test have been included as well as a detailed description of the indications to perform them. Also, the most frequent and recent variations of these diagnostic tests are included.

Results:

Laxity and instability should be considered separately. For anterior instability, a combination of apprehension, relocation and release tests provide great specificity. On the other hand, multidirectional or posterior instability can be difficult to diagnose especially when the main complain is pain.

Conclusion:

A detailed interview and clinical examination of the patient are mandatory in order to identify a shoulder instability problem. Range of motion of both shoulders, clicking of catching sensations as well as pain, should be considered together with dislocation and subluxation episodes. Specific instability and hyperlaxity tests should be also performed to obtain an accurate diagnosis.
Rehabilitation for Shoulder Instability – Current Approaches
Authors: Jaggi Anju , Alexander Susan
Published: September 2017

Background:

The shoulder relies predominantly on dynamic muscular control to provide stability. Successful treatment is highly dependent upon the correct clinical diagnosis, identification of anatomical structural defects and abnormal movement patterns so that rehabilitation programs can be designed accordingly and individualised to the patient.

Method:

A systematic outline is provided to guide the clinician on how to identify muscular insufficiencies both local to the shoulder joint and global muscles that can influence shoulder instability. Management is based on expert experience and current literature.

Results:

The Stanmore classification helps to correctly diagnose the type of instability and prioritise management. Symptom modification tests can help to guide management, however assessing individual muscle groups local to glenohumeral control is also recommended.

Conclusion:

Physical and psychosocial factors can influence motor control in the presence of pain and injury. A multi-disciplinary approach is required to avoid recurrence of symptoms with rehabilitation focusing on kinetic chain, scapular and gleno-humeral control.
Rationale of Cruciate Retaining Design in Rheumatoid Arthritis: A Review of Clinical Analysis and its Role in Rheumatoid Arthritis
Authors: Ashraf Munis , Sharma Om Prakash , Priyavadhana Sruthi , Sambandam Senthil Nathan , Mounasamy Varatharaj
Published: September 2017

Background:

Over the years, proponents of total knee designs (cruciate retaining and posterior stabilised) have conducted several long-term
studies to claim the potential of these designs in several subsets of patients. Total knee arthroplasty (TKA)
in patients with rheumatoid arthritis has also been one such domain where numerous studies were conducted in the past.
A general perception among majority of arthroplasty surgeons is that, posterior stabilised (PS) is the implanted design
of choice among patients with Rheumatoid arthritis (RA). However, with the available literature there is a significant
disparity related to the selection of implants in patients with rheumatoid RA. In this review of literature, an attempt is made
to identify the clinical performance and role of one such implant design, the cruciate retaining (CR) prosthesis in rheumatoid arthritis.

Method:

The review was conducted after a series of advanced search in the following medical databases; Pub med, Biomed central, Cochrane
and Google scholar for articles related to long term follow up studies of cruciate retaining total knee arthroplasty in rheumatoid
arthritis using the keywords cruciate retaining prosthesis, total knee arthroplasty, rheumatoid arthritis.

Results:

The
available data demonstrate that the CR design is attributed with an excellent long term survivorship and functional outcome even in
follow up studies up to twenty-five years.

Conclusion:

The advantages of using a CR design are long term survivorship, controlled
femoral roll back and preservation of bone stock. Thus, the data gathered in this review lead to a consideration that the CR design is an implant
design on par with PS design in patients with RA.
The Meaning of Flowers: A Cultural and Perceptual Exploration of Ornamental Flowers
Authors: Huss Efrat , Yosef Kfir Bar , Zaccai Michele
Published: September 2017

Background:

Since ancient times people have been attracted by flowers and have invested precious energy to cultivate them even though there is no known reward for this costly behavior- in all cultures. How can this attraction be understood? To what extend is this relationship between people and flowers made up of evolutionary, cognitive, perceptual, emotional or socio-cultural components? Does it shift within different cultures? How can we better understand the attraction of people to flowers on both a cultural and universal level? Many questions in this field remain open.

Objective:

To understand culturally constructed versus universal-perceptual components of the attraction of people to flowers. To explore how different types of cultivated flowers (with different perceptual elements) are conceptualized within a specific culture.

Methods:

Using mixed methods, we investigated the comparative preference of 150 participants for four visually different flowers. We explored the reasons for the preferred choice of flower. Based on the above first phase, we investigated participants' perceptions of the concept of a generic 'flower' and compared this to a mandala. Based on this second phase, we moved into cultural, perceptual and psychological theories using a concept-map, to access cultural understandings of specific flowers.

Results:

All four different flowers were equally chosen as first choice and therefore we introduced the generic or universal concept of 'floweriness' that was characterized by enhancing calmness and happiness.

On this level, the concept of the flower ranked higher for inducing happiness as compared to a mandala shape that induced more interest. The other three flowers were ranked and differentiated in terms of the cultural connotations that their different visual components aroused, within the context of Israeli culture.

Conclusion:

The results illustrate the interactive synergetic interplay between universal perceptual and specific cultural elements in relation to specific flowers. Together with this differentiation, the results also point to a central concept of “floweriness” that transcends the specific cultural connotations of specific flowers.
EFFECT OF LEARNING WITH ABDUCTIVE-DEDUCTIVE STRATEGY TOWARDS THE ACHIEVEMENT OF REASONING ABILITY OF HIGH SCHOOL STUDENTS
Authors: Shodikin Ali
Published: September 2017

The purpose of this study was to investigate the effect of learning with abductive-deductive strategy towards the achievement of mathematical reasoning abilities of high school students. Research carried out an experimental pretest-posttest design and the control group was not randomized in class XI student at one high school in Pati, Central Java, Indonesia. Data analysis was conducted quantitative research based on early mathematical ability categories (KAM) and overall. The results showed that the achievement of mathematical reasoning abilities that students acquire learning abductive-deductive strategy better than students who received the expository learning. In more detail of KAM categories, only middle category that show achievement of mathematical reasoning abilities better. While in upper and under categories have the same reasoning abilities achievements. This research is expected teachers can encourage students to do abduction and deduction in the learning achievement of students’ mathematical reasoning abilities.
ANALYSIS OF STUDENTS’ LEARNING OBSTACLES ON LEARNING INVERS FUNCTION MATERIAL
Authors: Perbowo Krisna Satrio , Anjarwati Restu
Published: September 2017

This research is based on the presence of obstacle in learning mathematics on inverse function. This research aims to analyze the learning obstacle, to know the types of error that is suffered by the students in learning inverse function. Kind of this kualitative research descriptive with data triangulation. The research subjects are high school students which is contained of 74 students and was taken 6 students to be main sample. The data of students’ error is obtained from the writen test result, the students’ false answers are identified into the type of error. Then it was chosen several students to be interviewed. Which the analysis result finding data in this research showed there are 4 types of errors, which are concept error, procedure error, counting error and concluding error. An obstacle which appear in learning inverse function is influenced by two factors, i.e internal factor and eksternal factor. Internal factor is showed by the students’ motivation in following learning and students’ skill in receiving learning material. While the eksternal factor is showed by the curriculum which applied in school with acceleration class caused many narrow learning time, teaching materials that is less complete with the discussion of question sample.
index65
Authors: Suen Vivian Marques Miguel
Published: September 2017

index65
Sequência de intervenção: uma alternativa para o processo de ensino e aprendizagem de Estatística para os anos iniciais de escolarização
 Sequence of intervention: an alternative to the process of teaching and learning Statistics for the initial years of schooling
Authors: Fernandes Rúbia Juliana Gomes , Dos Santos Junior Guataçara , Pereira Rudolph Dos Santos Gomes
Published: September 2017

ResumoO objetivo deste trabalho é divulgar um fragmento de uma pesquisa de mestrado sobre as contribuições de uma Sequência de Intervenção (SI) para o processo de ensino e aprendizagem da Estatística para os anos iniciais de escolarização. Com o intuito de atingir o objetivo apresentado, foi desenvolvida uma pesquisa numa turma de alunos do 4º Ano do Ensino Fundamental de uma escola da Rede Municipal de Curitiba. Para tal, foi trabalhada uma sequência de intervenção direcionada aos conteúdos básicos de Estatística. A metodologia utilizada na pesquisa é aplicada, descritiva e os resultados foram analisados na perspectiva qualitativa. Ao analisar os resultados advindos do desempenho dos alunos durante a execução dessa proposta pedagógica, percebeu-se um avanço significativo quanto à aquisição dos conteúdos, conhecimentos e saberes envolvendo Estatística.AbstractThe purpose of this paper is to disseminate a fragment of a master's research on the contributions of a sequence of intervention (IS) to the teaching and learning process of statistics for the initial years of schooling. In order to reach the objective presented, a research was developed in a class of students of the 4th Year of Elementary Education of a school of the Curitiba Municipal Network. For this, a sequence of intervention directed to the basic contents of Statistics was worked out. The methodology used in the research is applied, descriptive and the results were analyzed in the qualitative perspective. In analyzing the results of students' performance during the execution of this pedagogical proposal, a significant advance was made in the acquisition of contents, knowledge and knowledge involving Statistics.
Is New Zealand a World Leader in Early Childhood Education? An Examination of the Empirical Evidence in Recent Reports
Authors: Blaiklock Ken
Published: September 2017

NEW ZEALAND HAS A reputation for being a world leader in early childhood education (ECE); a reputation built on the development of innovative policies, high participation rates, high levels of teacher education, and the implementation of a national curriculum, Te Whāriki. A number of national and international reports have been used to support statements about the high quality of ECE in New Zealand. A closer examination of these reports, however, shows they provide insufficient attention to empirical information about children's learning and in some cases appear to be based on opinion rather than evidence. This article suggests that a downside of the belief that New Zealand is a world leader in ECE is that it may lead to complacency and a lack of willingness towards making evidence-based changes that could improve the wellbeing and learning of young children.
Food marketing to children in Canada: a settings-based scoping review on exposure, power and impact
Authors: Prowse Rachel
Published: September 2017

Introduction

Food marketing impacts children’s food knowledge, behaviours and
health. Current regulations in Canada focus on restricting promotional aspects of food
marketing with little-to-no consideration of the places where children experience food.
Understanding food marketing in children’s everyday settings is necessary to protect
children. This scoping review describes the current literature on food marketing to children
in Canada by setting.

Methods

The author searched databases for Canadian research on children’s exposure
to food marketing, and the power and impact of food marketing to children (2-17 years)
across settings, and on how current regulations may mediate the effect of food marketing
on children. Peer-reviewed studies in English, published between 2000 and 2016,
were included.

Results

Twenty-five studies documented children’s exposure to food marketing and its
power and/or impact on them in homes (via television, or online) (n = 12), public
schools (n = 1), grocery stores (n = 8), fast food restaurants (n = 2), and in general
(n = 2). Research trends suggest that unhealthy foods are targeted at children using
multiple promotional techniques that overlap across settings. Several research gaps
exist in this area, leading to an incomplete, and potentially underestimated, picture of
food marketing to children in Canada. Available evidence suggests that current Canadian
approaches have not reduced children’s exposure to or the power of food marketing in
these settings, with the exception of some positive influences from Quebec’s statutory
regulations.

Conclusion

The settings where children eat, buy or learn about food expose them to
powerful, often unhealthy food marketing. The current evidence suggests that “place”
may be an important marketing component to be included in public policy in order to
broadly protect children from unhealthy food marketing. Organizations and communities
can engage in settings-based health promotion interventions by developing their
own marketing policies that address the promotion and place of unhealthy food and
beverages.