bluuebunny/crossref_metadata_2025_split huggingface dataset:
Twisted Alexander Invariants Detect Trivial Links
Authors: Friedl Stefan , Vidussi Stefano 
Published: December 2016

AbstractIt follows fromearlier work of Silver andWilliams and the authors that twisted Alexander polynomials detect the unknot and theHopf link. We now show that twisted Alexander polynomials also detect the trefoil and the ûgure-Ç knot, that twisted Alexander polynomials detect whether a link is split and that twisted Alexander modules detect trivial links. We use this result to provide algorithms for detecting whether a link is the unlink, whether it is split, and whether it is totally split.
Influence of the Number of Bleaching Sessions on Fracture Resistance and Dentin Microhardness of Endodontically Treated Teeth
Authors: Bandeca Matheus Coelho , Kuga Milton C , Jordão-Basso Keren CF , Tonetto Mateus R , Lima Suellen L , Garrido Lorena DMA , Kalatzis-Sousa Natália G , Dantas Andrea AR , Leonardo Renato DT 
Published: December 2016

ABSTRACT

Objectives
To evaluate the effects of number of bleaching sessions on fracture resistance and dentin microhardness in endodontically treated teeth using 15% hydrogen peroxide with titanium dioxide nanoparticles (15HPTiO2) associated to light emitting diode (LED)—laser system.

Materials and methods
Forty human incisors were endodontically treated and divided according to the number of bleaching sessions (n = 10, each group): G1 — no treatment G2 — one; G3 — two; and G4 — three sessions. The 15HPTiO2 was applied within the pulp chamber and on the buccal surface, then photoactivated using LED—laser. All experimental specimens were restored with ionomer glass cement between each session and in the final treatment. Specimens were then subjected to the fracture resistance test (kN), using an electromechanical machine. To the dentin microhardness evaluation, 40 crown extracted endodontically treated human teeth were longitudinally sectioned, divided into groups as previously described (n = 10), and submitted to similar bleaching protocol. Dentin microhardness was evaluated before and after the final dental bleaching session in each group using Knoop indentator. Data were analyzed by analysis of variance (ANOVA) and Tukey tests (p = 0.05).

Results
The fracture resistance values were similar among all groups (p > 0.05). The number of dental bleaching sessions had a negative influence on the microhardness dentin, because G4 > G3 > G2 > G1 (p < 0.05).

Conclusion
The number of bleaching sessions using 15% hydrogen peroxide with titanium dioxide nanoparticles associated to LED—laser system had no influence on the fracture resistance of the endodontically treated teeth crowns, but promoted a reduction in dentin microhardness.

How to cite this article
Garrido LDMA, Kuga MC, Kalatzis- Sousa NG, Dantas AAR, Tonetto MR, Leonardo RDT, Jordão- Basso KCF, Lima SL, Borges AH, Bandeca MC. Influence of the Number of Bleaching Sessions on Fracture Resistance and Dentin Microhardness of Endodontically Treated Teeth. World J Dent 2017;8(1):5-9.
Compliance with Statutory Tobacco Guidelines in and around Schools in Mangaluru, India: An Observational Study
Authors: Rajesh G , Priyanka Ravi , Rao Ashwini , Ramya Shenoy , Mithun Pai BH 
Published: December 2016

ABSTRACT

Context
Tobacco is the foremost cause of preventable death and disease in the world today, and India is the second largest consumer of tobacco products in the world. The Cigarettes and Other Tobacco Products Act (COTPA) promulgated in 2003 by the Government of India, not only mandates ban on the sale of tobacco within a 100-yard radius around schools, but also provides guidelines for tobacco-free schools.

Aim
To determine if the provisions of the COTPA are being complied with, in Mangaluru, India.

Materials and methods
A cross-sectional study was conducted among 30 randomly selected schools in Mangaluru, India. Information was collected regarding sale of tobacco at vendor locations within 100-yard radius of these schools. An interview schedule was administered to the representative of the school, pertaining to the guidelines for tobacco-free schools.

Statistical analysis used
The data were coded and analyzed using the Statistical Package for Social Sciences (SPSS) version 11.5. The level of statistical significance was kept at p < 0.05.

Results
There were 48 shops located within 100-yard radius of the schools, out of which 46 (95.8%) sold single cigarettes but only one shop displayed surrogate advertisement. Among the 30 schools surveyed, only 3 (10%) displayed signages prohibiting smoking. Although the guidelines for tobacco-free schools explicitly state that all schools must have a copy of the COTPA, only 3 (10.0%) schools maintained a copy.

Conclusion
This study showed that there was a widespread violation of Section 6 of the COTPA 2003 in Mangaluru, India.

How to cite this article
Priyanka R, Rao A, Rajesh G, Ramya S, Mithun PBH. Compliance with Statutory Tobacco Guidelines in and around Schools in Mangaluru, India: An Observational Study. World J Dent 2017;8(1):10-13.
Factors determining Radiation Protection Practices among Indian General Dental Practitioners: An Explorative Study
Authors: Binnal Almas , Rajesh Gururaghavendran 
Published: December 2016

ABSTRACT

Introduction
Radiation exposure encountered in dentistry is minimal; however, their harmful effects cannot be ruled out. Though there are several guidelines established to minimize exposure to X-rays in dentistry, earlier studies have reported that practitioners are not entirely compliant with the same. There is, therefore, a definite need to identify factors that influence compliance with radiation protection practices among general dental practitioners (GDPs).

Objective
The objective is to assess various factors influencing radiation protection practices among Indian GDPs.

Materials and methods
A cross-sectional study design using a pretested, self-administered, structured questionnaire comprising of 37 items was employed in the present study. Information pertaining to demographics and radiation protection practices among GDPs was collected.

Results
A total of 66.7 and 49.4% did not follow position and distance rule respectively; overall, 88.5 and 94.3% did not use lead apron and thyroid collar respectively, for their patients. It was observed that 60.9% did not adjust exposure parameters according to tooth position; a total of 94.2% did not use personal dosimeters, while 63.2% disposed radiographic waste in common drain. Correlation analysis revealed significant association of awareness about governing bodies with educational course, distance rule with years of practice, personal dosimeter usage with gender, and other patients’ exposure to radiation with type of practice of the participants (p < 0.05).

Conclusion
The present study revealed poor radiation protection practices among GDPs. Low compliance with personnel- and patient-related protection measures was observed. A majority of the respondents were not familiar with radiation protection guidelines. Correlation analysis revealed important demographics that were influencing radiation protection practices among the respondents. The present study highlights crucial policy implications to ensure greater compliance with appropriate radiation protection guidelines among GDPs in India.

How to cite this article
Binnal A, Rajesh G, Ahmed J, Denny C. Factors determining Radiation Protection Practices among Indian General Dental Practitioners: An Explorative Study. World J Dent 2017;8(1):14-20.
Persistence of Residues after Endodontic Retreatment related to the Obturation Technique and to the Solvent
Authors: Bandéca Matheus Coelho , Kuga Milton C , Jordão-Basso Keren CF , Tonetto Mateus R , Aranda-Garcia Arturo J , Vázquez-Garcia Fernando A , Lima Suellen NL , Monteiro Jardel C do Carmo 
Published: December 2016

ABSTRACT

Objective
To quantify the persistence of residues after endodontic retreatment related to the root canal obturation technique (lateral compaction or single cone) previously performed and the solvent used (xylol or Endosolv-R) in the cervical and root apical segment using digital radiograph.

Materials and methods
Forty root canals were prepared using the F2 instrument and filled with gutta-percha and AH Plus, 20 canals using #25 point by lateral compaction and the other 20 using F2 point by single cone. The root canals were transversely sectioned, and two segments (cervical and apical) were obtained. Radiographs were taken from the segment in buccolingual and mesiodistal direction, as well as the area that was originally filled with the root canal obturation was measured using ImageJ. After the specimens were set on special devices, the obturations were removed using the rotary system and divided into four groups (n = 10): G1 — lateral compaction and xylol; G2 — lateral compaction and Endosolv-R; G3 — single cone and xylol; and G4 — single cone and Endosolv-R. A new radiograph was taken and the area occupied by residues was measured. The persistence of residues was obtained from the obturation remaining in the root canal in percentage. The data were analyzed using Kruskal—Wallis test (p = 0.05).

Results
There was no difference among the examined groups, regardless of the radicular segment or the radiograph direction (p > 0.05).

Conclusion
The endodontic retreatment using xylol or Endosolv-R in the obturations previously performed by lateral compaction or single cone technique presented similar persistence of residues in the root canal, regardless of the radicular segment.

How to cite this article
Aranda-Garcia AJ, Kuga MC, Vázquez-Garcia FA, Tonetto MR, Bandeca MC, Lima SNL, Freitas J, Borges AH, Jordão-Basso KCF, do Carmo Monteiro JC. Persistence of Residues after Endodontic Retreatment related to the Obturation Technique and to the Solvent. World J Dent 2017;8(1):41-44.
Smoking influences the Occurrence of Radiodermatitis in Head and Neck-irradiated Patients
Authors: Kuga Milton C , Tonetto Mateus R , Caetano Rafael DS , Castro Paulo HDS , Soares Ana C 
Published: December 2016

ABSTRACT

Introduction
This study aimed to evaluate the occurrence of radiodermatitis in patients undergoing radiotherapy in the head and neck.

Materials and methods
Thirty-eight patients were evaluated 6 months after the end of radiotherapy to treat cancer in the head and neck region. The radiodermatitis was clinically classified as absent, acute, or chronic. Data, such as age, sex, race/ color, drinking and smoking habits, number of radiotherapy sessions, and conduction of adjuvant chemotherapy were also obtained. Fisher's exact test and Pearson's test were used to analyze the correlation of the independent variables and the presence of radiodermatitis.

Results
The mean age of the patients was 59.71 (± 10.67), and 29 (76.3%) were men, 24 (63.2%) were non-white race/ color, 28 (63.7%) were alcohol consumers, and 33 (86.8%) were smokers. The average number of radiotherapy sessions was 37.26 (± 7.66); 30 (78.9%) patients underwent chemotherapy; and 26 (68.4%) had chronic radiodermatitis. The only variable statistically related to the occurrence of radiodermatitis in the patients was smoking.

Conclusion
Radiodermatite was quite prevalent among the studied patients and was directly related to the smoking habit.

How to cite this article
Caetano RDS, Volpato LER, Castro PHDS, Borba AM, Aranha AMF, Kuga MC, Tonetto MR, Soares AC, Bandeca MC, Borges ÁH. Smoking influences the Occurrence of Radiodermatitis in Head and Neck-irradiated Patients. World J Dent 2017;8(1):55-58.
Graffiti for science – erosion painting reveals spatially variable erosivity of sediment-laden flows
Authors: Beer Alexander R. , Kirchner James W. , Turowski Jens M. 
Published: December 2016

Abstract. Spatially distributed detection of bedrock erosion is a long-standing challenge. Here we show how the spatial distribution of surface erosion can be visualized and analysed by observing the erosion of paint from natural bedrock surfaces. If the paint is evenly applied, it creates a surface with relatively uniform erodibility, such that spatial variability in the erosion of the paint reflects variations in the erosivity of the flow and its entrained sediment. In a proof-of-concept study, this approach provided direct visual verification that sediment impacts were focused on upstream-facing surfaces in a natural bedrock gorge. Further, erosion painting demonstrated strong cross-stream variations in bedrock erosion, even in the relatively narrow (5 m wide) gorge that we studied. The left side of the gorge experienced high sediment throughput with abundant lateral erosion on the painted wall up to 80 cm above the bed, but the right side of the gorge only showed a narrow erosion band 15–40 cm above the bed, likely due to deposited sediment shielding the lower part of the wall. This erosion pattern therefore reveals spatial stream bed aggradation that occurs during flood events in this channel. The erosion painting method provides a simple technique for mapping sediment impact intensities and qualitatively observing spatially distributed erosion in bedrock stream reaches. It can potentially find wide application in both laboratory and field studies.
Life Skill Development of Youth Participants of the Tennessee 4-H Beef Skillathon
Authors: Harris Josey M. , Stripling Christopher T. , Stephens Carrie A. , Loveday H. Dwight 
Published: December 2016

The purpose of this study was to examine youth leadership life skill development among Tennessee beef skillathon participants and determine factors influencing their motivation to participate. Youth perceived the skillathon to have a moderate impact on their leadership life skill development. As a result, we recommend the skillathon continue to be an integral part of the overall livestock program in Tennessee. The reasons for participating in the skillathon mainly focused on testing knowledge, future careers, winning an award, fun, friends, 4-H agent or school-based agricultural education teacher, and personal development. Thus, utilizing both short-term and long-term influences during recruitment may increase skillathon participation. Future research should be conducted on a national level to determine youth leadership life skill development and reasons for participating in the skillathon competition.
Choose Health Action Teens: A Review of a Teens as Teachers Nutritional Education Training Curriculum
Authors: Flesch Jeffrey M. , Lile Joy R. , Arnold Mary E. 
Published: December 2016

This review draws from published research related to the best practices for the utilization of teens as teachers to examine Choose Health Action Teens (CHAT), a teen’s as teachers (TAT) training curriculum. Research shows that there are various components necessary to build a high quality TAT program. Most of these components fall under four areas in which training is necessary for teens and adults: Teaching strategies, youth/child development, subject matter to be taught, and youth-adult partnerships. These four areas provide a framework to review the Choose Health Action Teens (CHAT) (Crosiar & Wolfe, 2013) teens as teachers training program curriculum.
Can 4-H Involvement Have a Positive Impact on 4-H Youth’s Bullying Beliefs and Behaviors?
Authors: Duncan Dennis W. , Johnson Brittany , Fuhrman Nicholas E. , Ryles Bo 
Published: December 2016

Bullying has negative emotional and physical effects on youth which often continues into adulthood. Bullying can contribute to emotional distress which is often more difficult to detect in victims. Documented effects of bullying include depression, anxiety, bitterness, elevated levels of stress, as well as negative feelings of self-image and low self-esteem. The purpose of this study was to examine the impact that involvement in the state 4-H program has on bullying beliefs and behaviors. This study found that 94% of the participants (senior high students) agreed that 4-H helped them to shape their belief towards bullying; 84% either agreed or strongly agreed that 4-H has helped them be more confident around strangers; and 93% indicated that 4-H helped them to gain confidence in situations so they could speak up for themselves.
“Yet” ~ A Brief School-Based Program for Fourth Graders
Authors: Rogelberg Sandra L. , Uhrich Benjamin , Caudill Leann E. , Gur Shahar , Moffit Miles , Williams Eleanor B. , Rogelberg Steven G. 
Published: December 2016

“Yet” is a school-based youth development program intended to introduce elementarygrade students to concepts of growth mindset, self-leadership, resilience and self-talk to promote healthy coping strategies to persist in tasks toward more positive educational outcomes. Drawing from psychology, education, and management literature focusing on self-leadership, the “Yet” program encourages interaction and internalization of concepts such as “growing the brain,” and “stinkin’ thinking,” while modeling how to reframe set-backs to things students have not mastered…”yet,” and practicing adaptive self-talk to promote coping and persistence. This unique program holds promise because it is approximately 30 minutes long, occurs within the context of a regular school day, and can be implemented with a high measure of fidelity because it is script-based. The success of the program may be augmented by principal and teacher support along with online videos.
Youth and Adult Perceptions of a New Technology in California 4-H: The Online Record Book
Authors: Lewis Kendra M. , Steven M. Worker Steven M. 
Published: December 2016

Youth development research suggests that adult volunteers have the potential to influence the how and when youth engage with technology as a legitimate form of program participation. The adults’ comfort levels with technology, coupled with the historical structure of the youth development organization itself, shapes which technologies are made available to, adopted by, or perceived as relevant or useful to youth. This study explores how adults and youth members of California 4-H perceived the 4-H Online Record Book (ORB), an electronic version of the traditional 4-H record book. Survey data from 236 self-identified users and non-users of ORB provided feedback about their use of and feelings towards ORB, with youth expressing more positive feelings towards ORB and adults feeling more negative about the system. Youth however, felt supported by adults to use ORB.
AVALIAÇÃO REPRODUTIVA E DESEMPENHO DA PROGÊNIE NA FASE INICIAL DE GALOS SEMIPESADOS COM DIFERENTES PESOS CORPORAIS
Authors: Feijó Julmar Da Costa , Cruz Frank George Guimarães , Melo Ramon Duque , Rufino João Paulo Ferreira , Dias Emanuela Cristina De Souza , Brandão Augusto Bruno Trindade 
Published: December 2016

O objetivo deste estudo foi avaliar a capacidade reprodutiva e o desempenho da progênie (durante a fase inicial) de galos de duas linhagens semipesadas com diferentes faixas de peso. O delineamento experimental utilizado foi o inteiramente casualisado em esquema fatorial (3 x 2) constituído de dois fatores: três pesos corporais (2,5 kg, 2,75 kg e 3 kg) e duas linhagens semipesadas (Rhode Island Red e Plymouth Rock Barred), totalizando 6 tratamentos onde cada um possuía 5 galos analisados em três períodos de quatorze dias cada. Os dados coletados foram submetidos a análise de variância pelo teste de Tukey a 5% de significância. Galos mais pesados apresentaram melhores índices reprodutivos após a análise seminal, tendo a linhagem Rhode Island Red se sobressaído neste aspecto. Pintos oriundos de galos mais pesados apresentam maior peso ao nascer, sobressaindo novamente as aves da linhagem Rhode Island Red. Reprodutores machos mais pesados apresentam melhores índices reprodutivos seminais e de desempenho na sua progênie do que aves mais leves desde a análise da qualidade do sêmen, na relação entre o peso do ovo/peso do pinto e no desempenho da progênie na fase inicial do manejo. A linhagem Rhode Island Red apresentou melhores resultados para qualidade do sêmen do reprodutor e na relação peso do ovo de origem/peso do pinto, enquanto os pintos oriundos de galos da linhagem Plymouth Rock Barred apresentaram melhor desempenho durante a fase inicial.
CONTAGEM BACTERIANA TOTAL EM AMOSTRAS DE LEITE DE TANQUE NO ESTADO DO PARANÁ
Authors: Ribas Newton Pohl , Horst José Augusto , Cotarelli de Andrade Uriel Vinicius , Regonato Andressa , Pacheco Hendyel Aparecida , Sermann Kamila Chaves 
Published: December 2016

Avaliou-se os efeitos de meio sobre a contagem bacteriana total (CBT) e logarítmico da contagem bacteriana total (logCBT) de amostras de tanque individuais, comunitário e latões coletadas pelas indústrias, analisadas pelo Laboratório da Qualidade do Leite (LQL) da Associação Paranaense dos Criadores de Bovinos da Raça Holandesa (APCBRH) – Curitiba, PR. Foram analisadas 680.102 amostras de leite no período de janeiro de 2012 a maio de 2014 em dez regiões. As médias estimadas, desvios-padrão e coeficiente de variação para CBT, logCBT e idade da amostra foram: 1.307.000 ± 1.859.000 (UFC/mL), 136,7%; 5,89 ± 1,93 (log10UFCxmL-1), 29,5% e 2,95 ± 1,48 dias, respectivamente. Os efeitos incluídos no modelo matemático influenciaram significativamente (P<0,01) as variáveis estudadas. Menores valores para logCBT ocorreram no final do inverno e primavera (variando de 5,36 e 5,47 (log10UFCxmL-1)). Com o passar dos anos, observou-se uma diminuição dos valores, (5,66 para 5,51 (log10UFCxmL-1)). A região influenciou significativamente o logCBT (P<0,01), registrando a menor média de 3,64 em Campo Mourão e a maior de 6,44 (log10UFCxmL-1) na Metropolitana de Curitiba, justificadas por diferentes níveis de tecnologias adotadas nas diferentes regiões. Quando a idade da amostra variou de zero a dois dias o logCBT aumentou de 5,46 para 5,66 (log10 UFC x mL-1) e de três para sete dias, diminuíram de 5,66 para 5,57 (log10 UFC x mL-1). Resultados evidenciam a necessidade pelos produtores, técnicos e indústrias de reavaliarem seus procedimentos de higiene dos equipamentos de ordenha, resfriamento, temperatura e tempo de armazenagem do leite, melhorando a qualidade microbiológica do leite.
LDH SÉRICA EM CÃES COM NEOPLASIAS MALIGNAS E BENIGNAS
Authors: SEIXAS SANDRA VOGEL , DITTRICH ROSANGELA LOCATELLI , KRÜGER DANIELE VON , LASKOSKI LUCIANE , SIERAKOWSKI SHERON , CRISTO THIERRY GRIMA 
Published: December 2016

A lactato desidrogenase (LDH) é uma enzima citossólica, presente no músculo esquelético, coração, hemácias, pulmões, rim, fígado. Na medicina veterinária a LDH sérica é mensurada em pacientes com suspeita de lesões musculares. Porém, atualmente há poucos estudos verificando a sua importância no auxilio prognóstico de pacientes oncológicos. Foram analisados os resultados da LDH sérica em 40 amostras, sendo 32 com neoplasias malignas: adenocarcinoma (21), mastocitoma (7) e linfoma (4) e oito pacientes com neoplasias benignas: tumor venéreo transmissível-TVT (3), adenoma (5). Os níveis de LDH tiveram um comportamento diferenciado em cada tipo de neoplasia, demonstrando maior elevação em pacientes portadores de neoplasias malignas com metástase que foram a óbito. A LDH é indicada para auxiliar na rotina clínica de pacientes oncológicos com metástase para avaliação de prognóstico.
New Findings on Rock Engravings in the Oukaïmeden Valley (High Atlas, Morocco) and Their Implications to the Local Transhumance
Authors: Půtová Barbora 
Published: December 2016

Předmětem studie je skalní umění v údolí Oukaïmeden, které se nachází v centrální části Vysokého Atlasu na území Maroka. Studie se zaměřuje na konkrétní archeologické lokality, užité výtvarné techniky, stylové charakteristiky a další specifika místního skalního umění. Zvláštní pozornost je věnována motivům, vývojovým proměnám a datování skalního umění v údolí Oukaïmeden. Skalní umění se zde poprvé objevuje v pozdním neolitu, poté je rozvíjeno v pozdní době bronzové a přetrvává až do libyjsko-berberského období. V další části studie je představena interpretace motivů skalního umění včetně analýzy funkce a smyslu jejich umístění v krajině. V této souvislosti je popsán blízký vztah skalního umění k transhumanci, která přetrvává v oblasti Vysokého Atlasu až do současnosti. Cílem studie je popis a interpretace skalního umění v údolí Oukaïmeden s důrazem na sezónní užití vysokohorských pastvin berberskými pastevci.