bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evidence for a Till Layer Beneath Storglaciären, Sweden, Based on Electrical Resistivity Measurements
Authors: Brand Geoff , Pohjola Veijo , Hooke Roger Leb. 
Published: September 2017

AbstractElectrical resistivity measurements were made in a series of closely spaced holes drilled to the base of Storglaciären. Electrodes were lowered to the bottoms of the holes where they made contact with the substrate beneath the glacier. The measurements show that a layer of till, ~0.4–0.7 m thick, is present at the base of the glacier. The low resistivity of the layer indicates that it has a high water content, compared with tills of similar composition in the pro-glacial environment. A marked reduction in resistivity after a heavy rain storm demonstrates that the water content is sensitive to variations in water input at the surface.
The Ward Hunt Ice Shelf: Recent Changes of the Ice Front
Authors: Hattersley-Smith G. 
Published: September 2017

AbstractMassive calving of the Ward Hunt Ice Shelf, northern Ellesmere Island, occurred between August 1961 and April 1962. An estimated 596 km.2 of ice shelf with a volume of 18 to 24 km.3 became detached to form ice islands, five of which are very large with areas ranging from 70 to 140 km.2. The fracture pattern and the subsequent drift of these ice islands are discussed.
Light and Heavy Element Abundance Variations in the Outer Halo Globular Cluster NGC 6229
Authors: Johnson Christian I. , Caldwell Nelson , Michael Rich R. , Walker Matthew G. 
Published: September 2017

Abstract
NGC 6229 is a relatively massive outer halo globular cluster that is primarily known for exhibiting a peculiar bimodal horizontal branch morphology. Given the paucity of spectroscopic data on this cluster, we present a detailed chemical composition analysis of 11 red giant branch members based on high resolution (R ≈ 38,000), high S/N (>100) spectra obtained with the MMT-Hectochelle instrument. We find the cluster to have a mean heliocentric radial velocity of

, a small dispersion of

, and a relatively low

. The cluster is moderately metal-poor with

dex and a modest dispersion of 0.06 dex. However, 18% (2/11) of the stars in our sample have strongly enhanced [La, Nd/Fe] ratios that are correlated with a small (∼0.05 dex) increase in [Fe/H]. NGC 6229 shares several chemical signatures with M75, NGC 1851, and the intermediate metallicity populations of ω Cen, which lead us to conclude that NGC 6229 is a lower mass iron-complex cluster. The light elements exhibit the classical (anti-)correlations that extend up to Si, but the cluster possesses a large gap in the O–Na plane that separates first and second generation stars. NGC 6229 also has unusually low [Na, Al/Fe] abundances that are consistent with an accretion origin. A comparison with M54 and other Sagittarius clusters suggests that NGC 6229 could also be the remnant core of a former dwarf spheroidal galaxy.
CARMA λ = 1 cm Spectral Line Survey of Orion-KL
Authors: Friedel Douglas N. , Looney Leslie W. 
Published: September 2017

Abstract
Orion-KL is a well-known high-mass star-forming region that has long been the target of spectral line surveys and searches for complex molecules. One spectral window where the region had never been surveyed is around wavelengths of λ = 1 cm. This is an important window to observe, due to the fundamental and low energy transitions of numerous complex molecules that indicate the maximum spatial extent of the molecular species; knowing the spatial distribution of a molecule aids in determining the formation mechanism(s) of that molecule. Additionally, there are fewer transitions in this window, reducing confusion caused by blended lines that can be very problematic at shorter wavelengths (

mm). In this work, we present the first spectral line survey at λ = 1 cm of the Orion-KL region. A total of 89 transitions were detected from 14 molecular species and isotopologues, and two atomic species. The observations were conducted with the Combined Array for Research in Millimeter-wave Astronomy in both interferometric and single dish modes.
Critical successful factors for innovation in vietnamese firms
Authors: Hoai Nam Tran , Phong Tuan Nham , Van Minh Nguyen 
Published: September 2017

Purpose: Innovation is considered as a core element of sustainable competitive advantage in the rapidly changing environment. However, in Vietnam, researches on innovation are very rare, which are mostly general reports without underlying analyses of innovation in firms, especially determinants for innovation. Therefore, this paper focuses on analyzing critical successful factors for innovation in Vietnamese firms. Design/methodology/approach: This study used primary data through questionnaire survey from November 2015 to February 2016. Respondents were senior managers of firms located mostly at Hanoi (Northern), Hochiminh (Southern) and Danang city (Central). The questionnaire included multi-items designed to measure factors. Each item was measured by 5 point Likert scale: 1 (strongly disagree) to 5 (strongly agree). Questionnaires were administerd to 500 firms belonging to list of Vietnam Chamber of Commerce and Industry (VCCI) in these three cities with rate of 40% (Hochiminh city), 40% (Hanoi city) and Danang (20%). However, there were 360 returned questionnaires and valid to next analyses. Analysis methodologies of reliability, factor analysis and regression are utilized in this paper. Findings: We developed and tested a model of determinants for Innovation in Vietnamese firms. The major contribution of this study is testing six determinants for innovation in Vietnamese companies. The results showed that awareness of innovation, innovation strategy and policy, organization for innovation, HR for innovation and building capabilities have positive impact on innovation. Originality/value: This study makes a contribution for both academics and practitioners. For academics, this study provided one more empirical evidence of the determinants for innovation. Regarding practical implications, this study suggests that Vietnamese companies have to strengthen capabilities for employees through training, encourage generation of new ideas, rule breaking, and innovative behaviors by organizational members. Together, having high awareness of innovation, building rational innovation strategy and policy is essential factors that firms should possess and develop to enhance innovation performance. Although there is no confirmation for impact of finance on innovation level, firms should understand that increasing innovation investment can bring favorable condition to create innovation especially in SMEs.
Collaboration entre chercheurs et praticiens dans le cadre du projet Saines habitudes de vie – éducation physique et à la santé
Authors: Borges Cecília , Bengoechea Enrique García , Gray Shirley , Bush Paula , Guay Suzanne , Lefebvre Alain , Farr Katherine Baker et Sandy , Mélinge Thierry , Amos Margaret , Mercier Anne Sophie-Aubin et Joli-Anne 
Published: September 2017

La collaboration entre chercheurs et praticiens semble de plus en plus sollicitée dans une visée de développement professionnel des enseignants, tandis que la recherche-action apparait comme une voie privilégiée pour la mise en œuvre de dispositifs d’accompagnement visant l’émergence de communautés d’apprentissage (Savoie-Zajc, 2010). Cet article a trait aux enjeux de la collaboration entre chercheurs et praticiens dans le cadre du projet SHV-EPS1, visant la consolidation du rôle des éducateurs physiques quant à la promotion d’un mode de vie sain et actif chez les jeunes. Nous présentons les grandes lignes d’un dispositif inspiré de l’arrimage entre la formation, la recherche-action et la collaboration, auquel ont participé des enseignants chevronnés et débutants de commissions scolaires francophones et anglophones de Montréal. En nous appuyant sur des données issues de l’évaluation de huit ateliers impliquant douze enseignants, nous faisons part des quatre enjeux à la base de ce projet : le rôle respectif des praticiens et des chercheurs, leur collaboration, les savoirs qu’ils coconstruisent et la temporalité en jeu dans ce processus.
Une recherche collaborative menée auprès de professionnels des métiers de « l’aide à autrui » en région Nord pas de Calais
Authors: Niewiadomski Christophe 
Published: September 2017

La recherche décrite dans ces pages focalise son attention sur les « acteurs de première ligne » que représentent aujourd’hui les professionnels des métiers du soin et du travail social. Les transformations des réglementations, sous l’impulsion de nouvelles législations, et les conditions de vie de publics affectés par la montée de la précarité ont créé de nouveaux cadres d’exercice qui obligent les professionnels à repenser les modalités de leurs interventions. En effet, le contexte de l’ébranlement de la société salariale (Castel, 1995) confronte désormais certaines catégories sociologiques à une vulnérabilité structurelle, qui n’est pas sans conséquences en matière d’accompagnement sanitaire et social. Face à ces constats, où il apparaît que la parole des professionnels est souvent ignorée, méconnue, voire dévalorisée, cette contribution vise à présenter les premiers résultats d’une recherche collaborative menée en région Nord-Pas de Calais auprès des professionnels des métiers de la santé et du travail social, domaines où les tensions vécues au travail résonnent fréquemment avec celles des publics auxquels les professionnels ont à faire.
Root Canal Morphologies of Mesiobuccal Roots of Maxillary Molars using Cone beam Computed Tomography and Periapical Radiographic Techniques in an Iranian Population
Authors: Zand Vahid , Mokhtari Hadi , Zonouzi Hamid RM , Shojaei Sahand N 
Published: September 2017

ABSTRACT

Aim
The aim of this study was to evaluate the accuracy of the results of cone beam computed tomography (CBCT) examinations, confirm the presence or absence of the second mesiobuccal (MB2) root canal in maxillary first and second molars, estimate the distance between the root canal orifices, observe the root types based on Vertucci classification system, and make comparisons between CBCT and periapical techniques in relation to the identification of the root canal form and the second root canal of the MB root.

Materials and methods
The CBCT and periapical radiographic data from the Department of Maxillofacial Radiology were used to select 156 individuals (78 females and 78 males) for the evaluation of the anatomy of maxillary first and second molars.

Results
The prevalence rate of the second root canal in the MB root in the maxillary first molars was 55.1%, with 44.1 and 63.3% in females and males respectively. The prevalence rate in maxillary second molars was 23.7%, with 15.7 and 30.2% in females and males respectively. In addition, the longest and shortest distances between the root canal orifices were 2.4 and 0.3 mm respectively, with a mean of 1.3 mm.

Conclusion
There was a significant difference between the results of periapical and CBCT radiographic techniques in relation to the presence or absence of the second root canal in the MB roots of maxillary first and second molars (p < 0.01), with better results being provided by the CBCT technique.

Clinical significance
The results of CBCT images about the existence of the second root canal in the MB roots of maxillary first and second molars are more reliable, and we can use this technique in the finding of additional canals in the clinic.

How to cite this article
Zand V, Mokhtari H, Zonouzi HRM, Shojaei SN. Root Canal Morphologies of Mesiobuccal Roots of Maxillary Molars using Cone beam Computed Tomography and Periapical Radiographic Techniques in an Iranian Population. J Contemp Dent Pract 2017;18(9):745-749.
Comparative Evaluation of Two Different Flap Designs and Postoperative Outcome in the Surgical Removal of Impacted Mandibular Third Molar
Authors: Ahamed Shabeer , Rabi A , Haris PM Mohamed , Panickal Deepu M , Pulikkottil Venith J , Haris KT Muhamed 
Published: September 2017

ABSTRACT

Aim
The aim of this study is to compare triangular and envelope flap designs and the postoperative outcome in the surgical removal of impacted mandibular third molar.

Materials and methods
A total of 50 participants were assessed clinically and were divided randomly into two groups. Group I (participants operated by triangular flap) and group II (participants operated by envelope flap), with 25 participants each between the age group of 20 and 30 years. Patient satisfaction was assessed subjectively using a graded scale from very satisfied to very unsatisfied. The degree of pain was recorded for 7 days with reference to predefined values on visual analog scale (VAS). Trismus was evaluated on the day 3, day 5, and day 7 of the postoperative period in millimeters. Quantitative data were analyzed by unpaired t-test and qualitative data were by Fischer's exact test.

Results
The mean overall age is 25.5 years. There was no statistically significant difference between the study groups with respect to age. There was no significant association between the patient satisfaction and flap type (p = 0.684). A significant difference between the study groups on 4th, 5th, and 6th days with respect to pain was observed, wherein fewer subjects operated with triangular flap reported pain. A highly significant difference in mouth opening was observed, with triangular flap group participants having a higher mouth opening than envelope flap subjects on day 7.

Conclusion
The present study indicated that participants operated by triangular flap had a better mouth opening postoperatively compared with envelope flap participants, whereas there were no significant differences in patient satisfaction and pain scores at the end of the 7th day after third molar surgery.

Clinical significance
Flap design is a significant factor in the surgical removal of impacted third molar, and it influences the severity of complications. Furthermore, it is important for allowing optimal visibility and access to the impacted tooth and also for subsequent healing of the surgically created defect.

How to cite this article
Rabi A, Haris PMM, Panickal DM, Ahamed S, Pulikkottil VJ, Haris KTM. Comparative Evaluation of Two Different Flap Designs and Postoperative Outcome in the Surgical Removal of Impacted Mandibular Third Molar. J Contemp Dent Pract 2017;18(9):807-811.
Incidence of Prosthetic Complications associated with Implant-borne Prosthesis in a Sleep Disorder Center
Authors: Grover Shekhar , Suneel Venkatesh B , Kotian Santhosh , Jujare Ravikanth H , Shetty Adarsh K , Nidhi Sneh 
Published: September 2017

ABSTRACT

Background
Obstructive sleep apnea (OSA) is one of the common prevalent conditions present worldwide. The process of abnormal habits related to clenching and grinding of teeth is referred to as bruxism and is characterized under the heading of parafunctional activity of the masticatory system. Osseointegrated dental implants represent advancements in the field of odontology. Despite its high success rate, failure and complications are often associated with dental implant treatment due to a number of factors. Hence, we aimed for the present study to assess the incidence of prosthetic complications in patients rehabilitated with implant-borne prosthesis in a sleep disorder unit.

Materials and methods
The present study included the assessment of all the patients who underwent prosthetic rehabilitation by dental implants. An experienced registered prosthodontist was given duty for examination of all the cases from the record file data. Prosthetic complications in the patients were identified using photographs, radiographs, and all other relevant data of the patients obtained from the record files. All types of complications and other factors were recorded separately and analyzed.

Results
While correlating the prosthetic complications in OSA patients grouped based on number of dental implants, nonsignificant results were obtained. Significant correlation was observed while comparing the prosthetic complications divided based on type of prosthesis. Fracture of the porcelain was observed in four and eight cases respectively, of screwed and cemented dental implant cases.

Conclusion
Some amount of significant correlation existed between the incidences of prosthetic complications and OSA.

Clinical significance
Proper history of the patients undergoing dental implant procedures should be taken to avoid failure.

How to cite this article
Suneel VB, Kotian S, Jujare RH, Shetty AK, Nidhi S, Grover S. Incidence of Prosthetic Complications associated with Implant-borne Prosthesis in a Sleep Disorder Center. J Contemp Dent Pract 2017;18(9):821-825.
Evaluation of the Effect of recasting Nickel–chromium Base Metal Alloy on the Metal–ceramic Bond Strength: An in vitro Study
Authors: Meenakshi T , Bharathi Munagapati , Komala Jayasree 
Published: September 2017

ABSTRACT

Aim
The aim of this study was to evaluate the effect of recasting base metal alloy on the metal–ceramic bond strength.

Materials and methods
A total of 60 test samples were prepared from new and recast nickel–chromium alloy and divided into six groups. In group A0, test samples were prepared from 100% new alloy. Groups A1, A2, A3, A4, and A5 were prepared from 50% new alloy and 50% casting remnants (sprue and buttons) of the previous group by weight. All these samples were coated with ceramic (IPS d.SIGN and Ivoclar-Vivadent), and samples were then subjected to three-point bending test to evaluate metal–ceramic bond strength.

Results
The values were analyzed using one-way analysis of variance and Tukey's post hoc test. The mean bond strength of group A0 was higher than that of groups A1, A2, A3, A4, and A5.

Conclusion
Metal–ceramic bond strength decreased significantly with multiple recastings.

Clinical significance
Bond strength between metal and ceramic is a crucial factor for the clinical performance of metal–ceramic restorations. Recasting of alloys may affect the metal oxide layer composition and thickness of metal–ceramic interface, and thereby the metal–ceramic bond.

How to cite this article
Meenakshi T, Bharathi M, Komala J. Evaluation of the Effect of recasting Nickel–chromium Base Metal Alloy on the Metal–ceramic Bond Strength: An in vitro Study. J Contemp Dent Pract 2017;18(9):837-841.
Three-year Prospective Evaluation of Immediately Loaded Mandibular Implant Overdentures retained with Locator Attachments
Authors: Al-Dharrab Ayman 
Published: September 2017

ABSTRACT

Introduction
Immediate implant-loading protocol has progressed because of various clinical advantages offered by this treatment approach. However, available studies on edentulous patients are still few compared to those in which delayed implantloading protocol was applied.

Aim
This prospective study was to evaluate the implant survival rate and the peri-implant tissue response in a group of patients who received two unsplinted immediately loaded dental implants in the mandibular anterior region to retain a complete overdenture using locator attachments.

Materials and methods
A total of 24 edentulous patients with a mean age of 63.4 years were involved in this study following certain inclusion criteria. All patients received a new set of complete dentures before implant positioning. Two Prima Connex tapered implants were put in the interforaminal area of the mandible with a flapless surgical procedure, and the prefabricated dentures were immediately retained with a zest locator attachment. Clinical and radiographic records of the patients were reviewed immediately after placement of the implant, at 3 months, and at 1, 2, and 3 years following fixture installation. The obtained data were analyzed using paired samples t-test and the Wilcoxon signed-rank test at 0.05 significance level.

Results
At 3 years, all implants had osseointegrated with a 100% survival rate. In addition, the total mean marginal bone change was −0.89 ± 0.14 mm, and the mean periotest value was −7.631 ± 0.921.

Conclusion
Results of this study propose that immediate loading of mandibular implant overdentures that are retained with locator attachments was a feasible treatment alternative for this particular group of patients.

Clinical significance
Immediate implant- loading of mandibular implant overdentures that are retained with locator attachments is a reliable treatment option

How to cite this article
Al-Dharrab A. Three-year Prospective Evaluation of Immediately Loaded Mandibular Implant Overdentures retained with Locator Attachments. J Contemp Dent Pract 2017;18(9):842-850.
Bluetooth for White Tooth
Authors: Sundar Sathish , Mahendran Kavitha , Shekar Shobana , Kumarasamy Baskaran , Raj Aruna 
Published: September 2017

ABSTRACT
Dental caries is caused by a complex interplay of factors, with pH of the saliva playing a crucial role in initiating the carious process in the presence of cariogenic bacteria. It is the second most common infection in the world next only to common cold. So its prevention becomes very important and we have to devise newer effective strategies for the same. This article enlightens a proof of concept and working model of an indigenously developed wireless pH monitoring device which will be converted into a miniaturized version in future.
The micro pH meter facilitates long-term tooth surface pH monitoring and providing real-time feedback to the patients and dental experts. The pH meter sends signals to an external monitoring equipment via Bluetooth facility and warns the subject about the pH status of his saliva. After the reception of the warning, the subjects should use routine brushing and flossing or use a medicated chewing gum or rinse with a mouthwash. Extrapolating to the clinical environment, this novel dental device can control a global disease called caries, which causes a lot of financial burden and time-consuming restorative dental treatment to patients worldwide.

Clinical significance
Real-time devices that monitor the pH changes in the oral environment and alert the patient prompting them to adopt preventive measures will help in executing oral care services on a day-to-day basis, thereby averting the need for comprehensive oral procedures.

How to cite this article
Mahendran K, Sundar S, Shekar S, Kumarasamy B, Raj A. Bluetooth for White Tooth. J Oper Dent Endod 2017;2(2):61-64.
Effects of Bleaching Agents, Neutral Fluoride Gels, and Surface Sealants on Enamel Surface Roughness
Authors: Gümüştaş Burak , Gürbüz Özge , Efes Begüm G 
Published: September 2017

ABSTRACT

Aim
The aim of this in vitro study was to evaluate the surface roughness of enamel after the application of different bleaching agents and to determine the effect of fluoride and bonding agent application on the roughness of bleached enamel.

Materials and methods
Forty-two dental slice polished enamel surfaces were randomly assigned to six groups. The surfaces of the slices were treated with 30% carbamide peroxide (CP) (groups I to III), or 38% hydrogen peroxide (HP) (groups IV to VI). Groups I and IV were only bleached. Topical fluoride was applied to the bleached surface of groups II and V. Groups III and VI were covered with a bonding agent. The surface roughness was analyzed with a profilometer. Data were subjected to analysis of one-way analysis of variance, Kruskal-Wallis, and Mann-Whitney U tests (p > 0.05).

Results
There were no statistically significant differences between the surface roughness of the untreated control specimens and the specimens treated with the bleaching materials, fluoride gel, and dental bonding agent (p > 0.05).

Conclusion
Bleaching treatment with 38% HP and 30% CP does not alter enamel surface roughness.

Clinical significance
The application of topical neutral sodium fluoride agents and dental bonding agents does not have any influence on enamel surface roughness.

How to cite this article
Gümüştaş B, Gürbüz Ö, Efes BG. Effects of Bleaching Agents, Neutral Fluoride Gels, and Surface Sealants on Enamel Surface Roughness. J Oper Dent Endod 2017;2(2):74-78.