bluuebunny/crossref_metadata_2025_split huggingface dataset:
Removal of Organic Phase in Alumina Parts by Thermal Treatment
Authors: Coronel-Hernández José J. , Arellano-Badillo Víctor M. , Santos-Cruz José , Mayén-Hernández Sandra A. , Quintanar-Hernández Rocío 
Published: October 2015

ABSTRACTIn this work it was conducted a pre heat treatment of a number of samples of alumina with organic binder in order to remove most of the organic phase. The treatment showed no effect on the physical properties of test specimens; green bodies remained stable during sintering process. Preheating at 100 °C for 4 h followed by heating at 300 °C for 4 h were the most favorable conditions to avoid formation of defects in the sintered pieces.
Building of Protective Coating Against Corrosion by Flame Spraying of Mechanofused Composite Particles
Authors: Molina-Díaz A. , Delgado-Venegas J. , Juárez-López F. , Velázquez-García G. , Cuenca-Álvarez R. 
Published: October 2015

ABSTRACTA protective coating was built and assessed in order to reduce the degradation of metallic substrates caused by corrosion damage. Hence, a set of coatings with different configurations, in terms of layer arrangement, was produced by flame-spraying of composite powder (AISI 316L stainless steel coated with an α-alumina layer) onto an AISI 1018 steel substrate. In order to ensure a homogeneous dispersion of phases, a correlation was established between the operating parameters of thermal spraying (roughness and surface temperature of substrate, spraying distance, passing speed) and the splat formation. Then, corrosion damage caused in the coated samples by exposure to a salt spray was monitored through weight measurements and observations with optical and scanning electron microscopy. The results show that corrosion still remains in all cases; however, it proceeds at lower rates for coatings made with composite particles plus an α-alumina layer. The weight loss due to corrosion damage was reduced in approximately 94% as compared with the substrate without protection. Coating adhesion was also improved by an increased substrate roughness, with no need for an intermediate layer.
Influence of Boron on the Precipitation Kinetics in Advanced Ultra-High Strength Steels
Authors: Altamirano G. , Mejía I. , Hernández-Expósito A. , Cabrera J.M. 
Published: October 2015

ABSTRACTIn the present work, the stress relaxation method was employed to determine the influence of B addition on the kinetics of strain-induced precipitation and its interaction with the static austenite recrystallization. For this purpose, the behavior of two low carbon advanced ultra-high strength steels was analyzed during stress relaxation tests at different temperatures and constant pre-strain rate. The precipitation start (Ps) and finish (Pf) times were determined from the relaxation curves and then the corresponding precipitation-time-temperature diagrams were constructed for each steel. Transmission Electron Microscopy was used to determine the chemical nature and evolution of precipitation. In general, the results show that the addition of B retards the austenite recrystallization, tends to accelerate the precipitation kinetics of carbonitrides and leads to a finer and denser distribution of precipitates. These results are discussed in terms of the driving force for the nucleation of precipitation, which in turn is controlled by the degree of supersaturation of microalloying element and as a function of B segregation and B-vacancy complexes to dislocations and grain boundaries.
Boron Effect on the Softening Parameter (Ω) of Advanced Ultra-High Strength Steels (A-UHSS) under Uniaxial Hot-Compression Conditions
Authors: García-Mora E. , Mejía I. , Cabrera J.M. 
Published: October 2015

ABSTRACTAdvanced ultra-high strength steels (A-UHSS) are revolutionizing both the steel and automotive industries, therefore it is imperative to study their hot plastic deformation behavior and modeling. The flow characteristics of all hot forming processes consist basically of two competitive phenomena: strain hardening and softening due to dynamic mechanisms (recovery and/or recrystallization). In this research work, the softening parameter was determined in a low carbon A-UHSS microalloyed steel with different amounts of boron (0, 14 and 214 ppm). Experimental stress–strain data of uniaxial hot-compression tests at different temperatures (950, 1000, 1050 and 1100 °C) and strain rates (10–3, 10–2 and 10–1 s–1) were used. The stress–strain relationships as a function of temperature and strain rate were described on the basis of the Estrin, Mecking, and Bergström model. The experimental values of the softening parameter Ω were adjusted using the least-squares method. In general, the results reveal that the softening parameter increases with increasing boron content.
INCUBAÇÃO DO VERDETE COM DIFERENTES FONTES DE ÁCIDOS PARA DISPONIBILIZAÇÃO DE POTÁSSIO, CÁLCIO, MAGNÉSIO DO SOLO.
Authors: Silva Adriane de Andrade , Lana Regina Maria Quintão 
Published: October 2015

A rocha verdete é uma fonte possível de utilização como fertilizante potássico. Porém há uma limitação para melhorar sua disponibilização, sendo assim objetivou-se caracterizar o verdete quanto ao potencial de utilização agrícola, observar se ocorrerá aumento da disponibilidade de potássio, cálcio, magnésio quando o verdete for submetido a diferentes doses de ácido húmico e ácido fosfórico. Os testes de incubação foram realizados em potes de poliuretano com uso de LATOSSOLO VERMELHO de textura argilosa, o qual foram incubados tratamentos de diferentes doses de acido fosfórico; acido fosfórico+ acido húmico; acido humico. O ensaio foi conduzido por 90 dias, foram realizadas 2 coletas, aos 45 dias e 90 dias após a incubação. Realizou-se a determinação dos teores de potássio Houve efeito na disponibilização de potássio nos diferentes tratamentos e dosagens dos ácidos. A liberação de potássio foi maior quando se utilizou o ácido húmico de forma exclusiva. Porém houve efeito da utilização do acido fosfórico e do acido fosfórico + acído húmico. O cálcio, em relação ao tratamento controle observou-se um incremento de 53 a 75%. E o magnésio apresentou comportamento similar ao cálcio. Sendo assim concluiu-se que o verdete apresentou-se uma fonte de potássio com aumento da solubilização quando submetido a ataque dos ácidos testados. O ácido húmico foi a fonte de ácido que melhor disponibilizou o K. Há efeito das doses de ácido na disponibilização do K, Ca e Mg pela Rocha verdete.
Thirty-day readmission rates in spine surgery: systematic review and meta-analysis
Authors: Bernatz James T. , Anderson Paul A. 
Published: October 2015

OBJECT
The rate of 30-day readmissions is rapidly gaining significance as a quality metric and is increasingly used to evaluate performance. An analysis of the present 30-day readmission rate in the spine literature is needed to aid the development of policies to decrease the frequency of readmissions. The authors examine 2 questions: 1) What is the 30-day readmission rate as reported in the spine literature? 2) What study factors impact the rate of 30-day readmissions?

METHODS
This study was registered with Prospera (CRD42014015319), and 4 electronic databases (PubMed, Cochrane Library, Web of Science, and Google Scholar) were searched for articles. A systematic review and meta-analysis was performed to assess the current 30-day readmission rate in spine surgery. Thirteen studies met inclusion criteria. The readmission rate as well as data source, time from enrollment, sample size, demographics, procedure type and spine level, risk factors for readmission, and causes of readmission were extrapolated from each study.

RESULTS
The pooled 30-day readmission rate was 5.5% (95% CI 4.2%–7.4%). Studies from single institutions reported the highest 30-day readmission rate at 6.6% (95% CI 3.8%–11.1%), while multicenter studies reported the lowest at 4.7% (95% CI 2.3%–9.7%). Time from enrollment had no statistically significant effect on the 30-day readmission rate. Studies including all spinal levels had a higher 30-day readmission rate (6.1%, 95% CI 4.1%–8.9%) than exclusively lumbar studies (4.6%, 95% CI 2.5%–8.2%); however, the difference between the 2 rates was not statistically significant (p = 0.43). The most frequently reported risk factors associated with an increased odds of 30-day readmission on multivariate analysis were an American Society of Anesthesiology score of 4+, operative duration, and Medicare/Medicaid insurance. The most common cause of readmission was wound complication (39.3%).

CONCLUSIONS
The 30-day readmission rate following spinal surgery is between 4.2% and 7.4%. The range, rather than the exact result, should be considered given the significant heterogeneity among studies, which indicates that there are factors such as demographics, procedure types, and individual institutional factors that are important and affect this outcome variable. The pooled analysis of risk factors and causes of readmission is limited by the lack of reporting in most of the spine literature.
L'atelier de potiers gallo-romain de Puyloubier (B.-du-Rh.). Prospections et étude du matériel.
Authors: Laubenheimer Fanette , Gruel Katherine , Naciri Abdellah , Pasquier Michel , Widemann François 
Published: October 2015

The Gallo-Roman pottery workshop in Puyloubier (B.-du-Rh.). Site survey and study of the material.
On a site previously known, magnetic prospection revealed a group of kilns. Systematic surface collection in the surrounding fields yielded kiln wastes, such as fragments of amphoras, tiles, and common pottery. This was a pottery workshop of medium importance (less than 2,5 acres), containing three or four kilns.
The study of the material collected has revealed the particularities of the different productions. Among the amphoras a group stands out that is not well known, called "variant B" of the "Gauloise 1" form. Analysis by neutronic activation clusters all the productions from this pottery workshop into one single fairly homogeneous group.
The workshop functioned throughout the first century A.D. and was abandoned during the second century.
Le quartier sud de l'agglomération antique de Lunel-Viel (Hérault)
Authors: Raynaud Claude 
Published: October 2015

Dans le cadre des recherches systématiques sur l'agglomération gallo-romaine de Lunel-Viel, l'étude du quartier sud apporte les premières données sur la chronologie de cet habitat rural. Les niveaux de l'Antiquité tardive, les plus nombreux, donnent un abondant mobilier qui permet de réaliser l'inventaire statistique précis des différentes catégories, et de sérier l'évolution des céramiques languedociennes du IIIème au VIème s. de n. è.
Les couches d'incendie d'une habitation du IIIème s. constituent un remarquable ensemble clos qui favorise l'approche ethnographique d'un espace de vie domestique à la fin de l'Antiquité.
L'oppidum du Baou-des-Noirs à Vence (A. -M.)
Authors: Latour Jean 
Published: October 2015

The Baou-des-Noirs hill- fort at Vence (A.-M.)
The fortified settlement of Baou-des-Noirs, near Vence covers a surface of a little less than four acres. It was explored between 1972 and 1976, which permited a general survey of the site and of its principal defensive walls. From several prospect excavations it was possible to establish the stratigraphie sequences from the Late Bronze Age to the second century B. C. The main fortifications belong to the end of the sixth century, and they seem to have been obsolete by the time the hill-fort was abandoned. During the third century or the beginning of the second the summit of the mountain was reoccupied, including the construction of a monumental quadrangular tower. Carefully carved tufa blocks could permit a partial restoration of its walls. The tower brings to mind a relationship with the one at the Mauressip site (Gard).
L'étude des cadastres antiques : à propos d'Olbia de Provence
Authors: Benoit Jean 
Published: October 2015

La connaissance des modes de l'occupation des sols, tant urbaine que rurale, prend de plus en plus d'importance dans l'approche actuelle des sociétés antiques. L'étude des cadastrations grecques et romaines du pourtour méditerranéen concerne également le Midi gaulois, non sans poser plusieurs problèmes de méthode pour leur identification, leur restitution et leur datation. Partant de ses récentes analyses sur la cadastration du territoire alentour de la fondation massaliote d'Olbia, J. Benoit s'interroge, en premier lieu, sur la fiabilité, les limites, voire les dangers des diverses techniques d'investigation généralement usitées.
A l'intérieur d'une zone cadastrée au Nord d'Olbia, J. Benoit dissocie celle située au Nord-Nord-Est de l'agglomération antique. Après une interprétation critique et des comparaisons méditerranéennes, l'auteur délimite une aire relativement réduite (305 ha), s'étalant entre mer et montagne, rythmée selon un module rectangulaire de 105 x 52,5 m. Ce cadastre, très probablement édifié sur la mesure d'un pied de 29,6 cm, pourrait se rapporter à l'époque de colonisation grecque (milieu du IVème - début du Ier s. av. J.-C).
Monnaies étrangères aux émissions massaliètes découvertes sur l'oppidum de La Cloche, aux Pennes-Mirabeau (B.-du-Rh.)
Authors: Chabot Louis 
Published: October 2015

Coins foreign to Marseilles mint discovered at the hill-fort of La Cloche, in Les Pennes-Mirabeau (B.-du-Rh.)
The La Cloche hill-fort, situated near Marseilles has yielded since the beginning of the discoveries in 1967, close to a thousand coins essentially produced in the Greek city. Through this article L. Chabot gives a complete inventory of the coins that are foreign to the Marseilles mint. This amounts to 82 specimens which are carefully described and illustrated. The coins are presented according to their region of origine (Italy, Cyrenaica, Ibiza, Narbonnaise Gaul, Gallia Comata, Celtic Gaul). Their presence in this settlement violently destroyed about 50 B. C, and never reoccupied, enables interesting associations and chronological precisions concerning their date of appearance throughout the first century B. C.
L'analyse pétrographique des céramiques et le problème de la provenance des amphores massaliètes (VIème-IIème s. av. J.-C) [L'origine des amphores massaliètes (I)]
Authors: Reille Jean-Louis 
Published: October 2015

Petrographie pottery analysis and the problem of the origine of Massaliote amphoras.
From a selection of samples of Marseilles type amphoras found in a site of the lower Rhône valley, but convering a chronological scale of four centuries, the author renews the question about the original center of production of the containers. A critical pétrographie analysis of the dégraissant (scouring agent) allows to claim with certitude that its origine is the Maures Massif (as it was proposed before), and more precisely the coastal area between the Levant He and Cavalaire. However the presumption of a local fabrication of these vessels, using a natural unadulterated clay is invalidated by the analyses of alluvial soil of the middle and the lower Argens valley.
The study does not clarify the exact origine of the amphoras, but it eliminates the idea of a systematic fabrication center on the Var coast, leaving a wide range open to all possibilities, includind the one of regrouping the workshops... near Marseilles !
L'habitat de hauteur de Sainte-Propice (Velaux, B.-du-Rh.). L'occupation de l'Antiquité tardive
Authors: Boixadera Michel , Bonifay Michel , Pelletier Jean-Pierre , Rigoir Jacqueline , Rigoir Yves , Rivet Lucien 
Published: October 2015

The Sainte-Propice hilltop settlement at Velaux (B.-du-Rh.). The Late Antiquity occupation.
In the lower Arc valley, the Sainte-Propice plateau revealed a pre-Roman settlement, where later structures were built during the Late Antiquity period, and mainly in the northwestern extremity of the site. A limited excavation in this last zone enabled to unearth the stone foundations of a single dwelling. The article is mainly concerned with the analysis of the different types of pottery brought to light in the strata related to this habitation : clear Terra Sigillata D ceramic, sigillata -derived Early Christian ware, common pottery made of dark clay (local or imported). The explored house seem to have lasted a relatively short period, between the middle of the 5th to, at the latest, the middle of the 6th century A. D.
L'habitat F des Sausses (Séguret, Vaucluse). Aspects de la petite exploitation paysanne sous le Haut-Empire autour de Vaison-la-Romaine
Authors: Meffre Joël-Claude 
Published: October 2015

Conjointement à une enquête sur l'occupation antique des terroirs dans la région de Séguret, la fouille récente de structures d'habitat dans le vallon des Sausses nous permet désormais d'appréhender une petite exploitation paysanne d'une superficie d'environ 250 m2. Fondée autour du changement d'ère, cette unité d'habitation paraît avoir existé jusque vers 150-170. Son analyse architecturale détaillée montre un agrandissement du corps principal par l'ajouts successifs d'autres espaces annexes et souligne le caractère essentiellement agricole de l'ensemble. Les technologies mises en œuvre s'inscrivent globalement dans la continuité des pratiques protohistoriques tout en assimilant les nouveaux apports contemporains. La "ferme" étudiée est incluse dans un ensemble de dix autres relativement proches.
Cette publication (qui en annonce d'autres) pose une série d'interrogations sur la composition et la variété des modes d'implantation dans les terroirs de la région de Vaison-la-Romaine au début du Haut-Empire.
Le hameau fortifié du Puig Castellet à Lloret de Mar (Girona, Espagne). Un bilan des recherches.
Authors: Pons i Brun Enriqueta , Llorens i Rams Josep Maria , Toledo i Mur Assumpció 
Published: October 2015

Résumé - La petite agglomération fortifiée du Puig Castellet couvre une superficie de 650m2. Sa fonction essentielle paraît liée à la surveillance des côtes et du territoire avoisinant. Ce petit hameau de hauteur, encore peu connu des archéologues français, présente l'intérêt majeur d'être aujourd'hui fouillé dans sa totalité. A l'intérieur du mur d'enceinte (dont une des portes est renforcée par une tour), les espaces de vie répartis latéralement déterminent une aire centrale collective. Trois principales phases d'évolution ont été déterminées durant une période d'existence relativement courte comprise entre 275 et 225 av. J.-C.
Cet article est la première synthèse de ces fouilles publiée en langue française ; il insiste particulièrement sur le contexte naturel, l'organisation de l'habitat, les technologies mises en œuvre, les structures domestiques ou collectives.
Le village protohistorique du quartier de l'Ile à Martigues (B.-du-Rh.). Les espaces domestiques de la phase primitive (début du Ve s. — début du IIe s. av. J.—C). I - Les aménagements domestiques.
Authors: Chausserie-Laprée Jean , Nin Núria 
Published: October 2015

De 1978 à 1989, d'importantes recherches archéologiques liées à la revalorisation urbaine du quartier de l'Ile à Martigues ont révélé de vastes portions de deux villages protohistoriques successifs, urbanisés et fortifiés. A la suite des travaux portant sur l'urbanisme, la fortification et l'architecture de l'agglomération primitive (articles parus dans les tomes 7, 1984, pp. 27-52 et 10, 1987, pp. 31-89), les auteurs achèvent ici leur enquête sur les structures bâties par l'étude des espaces domestiques.
Après une définition précise du cadre spatial et chronologique de la recherche, un inventaire détaillé décrit les différents dispositifs rencontrés (structures de combustion et de stockage, banquettes et murets, etc.). Pour chaque ensemble, l'analyse des données permet de dégager une typologie morphologique et fonctionnelle pour les aménagements du site mais également pour ceux des autres habitats du Midi de la Gaule. Dans un second temps, une approche diachronique met en valeur les évolutions et les permanences entrevues au cours des trois siècles de l'occupation du village (du Ve à la fin du IIIe s. av. J.-C).
Pratiques cultuelles et funéraires en milieu domestique sur les oppidums languedociens.
Authors: Dedet Bernard , Schwaller Martine 
Published: October 2015

This synthetic approach to the familt cultand burial practices in the Iron Age habitats of the languedoc is the first of its kind in Southern Gaul. The reflexions are based on a complete analysis of the existing documentation and stress its limitations caused by difficulties in interpretation and attribution. The documents selected by the authors are listed, commented and placed in a wider socio-cultural context, arranged in several series established according to their probable significance. A first groupe consists of human remains found in a homogeneous context. It is completed by an analysis of isolated remains of the same nature. A third group includes specific objects deposited in graves and objects with a possible ritual function.
Cautiously and fully conscious of the dangers of over-interpretation, the authors attempt to discover the nature of the actions revealing the mentalities and beliefs of thre Iron Age, stressing the regional traditions and, in contrast, the out- sides influences, in this case Hellenic. Some documents suggest collective practices (e.g. graves of prominent persons). Most, however, point to family (infant burial) or individual (amulets, etc.) practices. The distribution of practices over space and time is also discussed.
Les tombes protohistoriques de Gros-Ped, Les Arcs-sur-Argens (Var)
Authors: Bérato Jacques , Dugas Franck , Dutour Olivier 
Published: October 2015

The accidental discovery of two cremations burial places in the central Var department has revived the knowledge of the funeral practices of the Early Iron Age in this region. The well-preserved burial places are presented in their structural lay-out (in plain earth, whitout any particular protection or marking) and ritual arrangement (bones collected from the pyre, relation to the personal objects of the deceased, accompanying offerings or libations). Besides pottery, part of which is finely decorated, some metal or bone objects (ornaments, arms, plaques) strike us because of their technical quality and their close relation to the products of the Hallstatt cultures in the Northern Alps. Lastly, a built-up ustrinum has been excavated.
The burial places can be to dated to the VIth c. ; the cremation area, however, is somewhat more recent (between the end of the VIth and the end of the Vth c. B.C.).
Béziers au Ve s. av. J.-C. : étude d'un ensemble de mobilier représentatif et essai de caractérisation du site
Authors: Ugolini Daniela , Olive Christian 
Published: October 2015

Excavations carried out in the centre of Béziers in recent years allowed the archaeological exploration of the levels Vth and IVth c. B. C. In this paper the authors present a collection of objects from a thick preparatory core for a road, representative of the last three quarters of the Vth c. The complete analysis of the collected objects, mainly pottery and metal objects, plus some fauna, is very detailed and abundantly illustrated. In addition, regional and Mediterranean comparisons bring the authors to stress the distinctives features of this large protohistoric agglomeration in the context of Southern France (concerning town-planning and private architecture, only touched upon here, but mainly table and kitchen crockery). Precise counts of almost 9 000 fragments provide a new reference basis for the Languedoc, but also for the far-west Mediterranean.
The extent of the Mediterranean factors, the specificities noted and the remarkable scarcity of local indigenous features induce the authors to stress the particular relations of this habitat with the Western Greek world and its strongly Hellenised character and to consider the presence of Phocaeans.