bluuebunny/crossref_metadata_2025_split huggingface dataset:
Cardiac Geometry in Children Receiving Chronic Peritoneal Dialysis
Authors: Bakkaloglu Sevcan A. , Borzych Dagmara , Soo Ha Il , Serdaroglu Erkin , Büscher Rainer , Salas Paulina , Patel Hiren , Drozdz Dorota , Vondrak Karel , Watanabe Andreia , Villagra Jorge , Yavascan Onder , Valenzuela Maria , Gipson Deborah , Ng K.H. , Warady Bradley A. , Schaefer Franz 
Published: July 2011

Summary

Background and objectives
Left ventricular hypertrophy (LVH) is an independent risk factor and an intermediate end point of dialysis-associated cardiovascular comorbidity. We utilized a global pediatric registry to assess the prevalence, incidence, and predictors of LVH as well as its evolution in the longitudinal follow-up in dialyzed children.

Design, setting, participants, & measurements
Cross-sectional echocardiographic, clinical, and biochemical data were evaluated in 507 children on peritoneal dialysis (PD), and longitudinal data were evaluated in 128 patients. The 95th percentile of LV mass index relative to height age was used to define LVH.

Results
The overall LVH prevalence was 48.1%. In the prospective analysis, the incidence of LVH developing de novo in patients with normal baseline LV mass was 29%, and the incidence of regression from LVH to normal LV mass 40% per year on PD. Transformation to and regression from concentric LV geometry occurred in 36% and 28% of the patients, respectively. Hypertension, high body mass index, use of continuous ambulatory peritoneal dialysis, renal disease other than hypo/dysplasia, and hyperparathyroidism were identified as independent predictors of LVH. The use of renin-angiotensin system (RAS) antagonists and high total fluid output (sum of urine and ultrafiltration) were protective from concentric geometry. The risk of LVH at 1 year was increased by higher systolic BP standard deviation score and reduced in children with renal hypo/dysplasia.

Conclusions
Using height-adjusted left ventricular mass index reference data, LVH is highly prevalent but less common than previously diagnosed in children on PD. Renal hypo/dysplasia is protective from LVH, likely because of lower BP and polyuria. Hypertension, fluid overload, and hyperparathyroidism are modifiable determinants of LVH.
Geographic and Educational Factors and Risk of the First Peritonitis Episode in Brazilian Peritoneal Dialysis Study (BRAZPD) Patients
Authors: Martin Luis C. , Caramori Jacqueline C.T. , Fernandes Natalia , Divino-Filho Jose C. , Pecoits-Filho Roberto , Barretti Pasqual 
Published: July 2011

Summary

Background and objectives
Peritonitis remains as the most frequent cause of peritoneal dialysis (PD) failure, impairing patient's outcome. No large multicenter study has addressed socioeconomic, educational, and geographic issues as peritonitis risk factors in countries with a large geographic area and diverse socioeconomic conditions, such as Brazil.

Design, setting, participants, & measurements
Incident PD patients recruited from 114 dialysis centers and reporting to BRAZPD, a multicenter observational study, from December 2004 through October 2007 were included. Clinical, dialysis-related, demographic, and socioeconomic variables were analyzed. Patients were followed up until their first peritonitis. Cox proportional model was used to determine independent factors associated with peritonitis.

Results
In a cumulative follow-up of 2032 patients during 22.026 patient-months, 474 (23.3%) presented a first peritonitis episode. In contrast to earlier findings, PD modality, previous hemodialysis, diabetes, gender, age, and family income were not risk predictors. Factors independently associated with increased hazard risk were lower educational level, non-white race, region where patients live, shorter distance from dialysis center, and lower number of patients per center.

Conclusions
Educational level and geographic factors as well as race and center size are associated with risk for the first peritonitis, independent of socioeconomic status, PD modality, and comorbidities.
Physical concept of shear fracture mesomechanism and its applications
Authors: Dzidowski Edward 
Published: July 2011

AbstractThe key objective of the present paper is an attempt to create an interface between the existing inconsistent views on the microscopic and macroscopic aspects of the mechanism of plastic deformation and shear fracture. This will be enabled by a focus on the course and effects of the evolution of dislocation structure, and will consist in considering an indirect, i.e. a mesoscopic scale of the discussed phenomena. Thanks to this, a synergy between the mechanisms of deformation and fracture of materials will be proven, which will provide an opportunity for a smooth transfer from the microscopic, through mesoscopic, to macroscopic scale of the analysed phenomena. This in turn will offer an opportunity to define and use the new criteria for controlling the mechanism of shear fracture. These criteria will be applicable to the complete range of temperatures and strain rates which are typical of metal working processes. Some examples of how these criteria may be applied in order to optimise the parameters of metal working will also be provided. These examples have made it possible to prove that the physical approach to shear fracture mesomechanism offers much broader cognitive and utilitarian opportunities than the existing purely mathematical methods. This is due to the fact that the physical approach allows for a deeper understanding of shear fracture meso- and macromechanism, and generates new criteria controlling this mechanism.
Catalogue of the J-Q trajectories for CC(T) and SEN(T) specimens in tension
Authors: Graba Marcin 
Published: July 2011

AbstractIn this paper a short theoretical background about elastic-plastic fracture mechanics is presented and the O’Dowd-Shih theory is discussed. Using FEM, the values of the Q-stress determined for various elastic-plastic materials for two specimens in tension — SEN(T) specimen and CC(T) specimen are presented. The influence of geometry of the specimen, crack length and material properties (work-hardening exponent and yield stress) on the Q-parameter are tested. The numerical results were approximated by closed form formulas. The results are summarized in a catalogue of the Q-stress value, which may be used in engineering analysis for calculation of the real fracture toughness and the stress distribution near crack tip.
Numerical analysis of composite STEEL-CONCRETE SECTIONS using integral equation of Volterra
Authors: Partov Doncho , Kantchev Vesselin 
Published: July 2011

AbstractThe paper presents analysis of the stress and deflections changes due to creep in statically determinate composite steel-concrete beam. The mathematical model involves the equation of equilibrium, compatibility and constitutive relationship, i.e. an elastic law for the steel part and an integral-type creep law of Boltzmann — Volterra for the concrete part. On the basis of the theory of the viscoelastic body of Arutyunian-Trost-Bažant for determining the redistribution of stresses in beam section between concrete plate and steel beam with respect to time “t”, two independent Volterra integral equations of the second kind have been derived. Numerical method based on linear approximation of the singular kernal function in the integral equation is presented. Example with the model proposed is investigated.The creep functions is suggested by the model CEB MC90-99 and the “ACI 209R-92 model. The elastic modulus of concrete Ec(t) is assumed to be constant in time ‘t’. The obtained results from the both models are compared.
Views and Reviews
Authors: Alvarez Natalie 
Published: July 2011

Introduction to Views and Reviews, by Natalie AlvarezUnclassified and Controvertible: The Edward Curtis Project and Beyond Eden in Vancouver, 2010, by Beverly YhapMany Stories, Many Voices: Alberta Aboriginal Arts, by Scott SharplinHumanizing Strangers Near and Far: Ethics and Irony in The Middle Place and A Taste of Empire, by Barry FreemanThe Politics of Distraction: Spectatorial Freedom and (dis)Enfranchisement in Toneelgroep's Roman Tragedies, by Natalie Corbett and Keren ZaiontzDancing in the Dark: Tu vois ce que je veux dire?, by Natalie Rewa
Surgical management of coccidioidomycosis of the spine
Authors: Kakarla Udaya K. , Kalani M. Yashar S. , Sharma Giriraj K. , Sonntag Volker K. H. , Theodore Nicholas 
Published: July 2011

Object
Coccidioides immitis is a dimorphous fungus endemic in the southwestern US and northern Mexico. While its primary presentation is pulmonary, it can have devastating neurological sequelae.

Methods
The authors provide a retrospective review with long-term follow-up between 1986 and 2008 at a single institution.

Results
The authors identified 27 patients between 13 and 81 years old (mean 41.4 years) with spinal coccidioides who were treated surgically at the Barrow Neurological Institute between 1986 and 2008. There were 24 males (89%) and 3 females (11%). Eleven patients (41%) had cervical spine involvement, 15 (56%) had thoracic involvement, 7 (26%) had lumbar involvement, and 2 (7%) had sacral involvement. All 27 patients presented with localized or radiating pain. Nine patients (33%) had myelopathic symptoms at presentation, 5 (19%) had radiculopathy, 4 (15%) had fever, and 12 (44%) had progressive kyphosis. The disease was most frequently seen among African American patients (14 patients [52%]), followed by Caucasians (5 patients [19%]), Asians (3 patients [11%]), and Hispanics (3 patients [11%]). Ten patients (37%) required multiple operations at the same level. Follow-up was available in 19 patients (70%) (mean 9.8 months, range 1–39 months). Sixteen (84%) of these 19 patients improved from their preoperative baseline states, 1 (5%) was stable on examination, 1 patient's condition (5%) deteriorated compared with the preoperative examination, and 1 patient (5%) died in the postoperative period.

Conclusions
Although spinal involvement of coccidioidomycosis is relatively uncommon, a high index of suspicion and aggressive therapy are warranted to prevent devastating neurological injury, and lifelong antifungal therapy is often warranted.
Chronic cerebellar hemorrhage in spontaneous intracranial hypotension: association with ventral spinal cerebrospinal fluid leaks
Authors: Schievink Wouter I. , Maya M. Marcel , Nuño Miriam 
Published: July 2011

Object
Spontaneous intracranial hypotension is an important cause of new-onset daily persistent headache. Cerebellar hemorrhage has been identified as a possible feature of spontaneous intracranial hypotension. The authors reviewed the MR imaging studies from a group of patients with spontaneous intracranial hypotension to assess the presence of cerebellar hemorrhage.

Methods
Medical records and radiological images were reviewed in 262 cases involving patients with spontaneous intracranial hypotension who had undergone MR imaging of the brain as well as spinal imaging.

Results
Chronic cerebellar hemorrhages were found in 7 (2.7%) of the 262 patients with spontaneous intracranial hypotension. These hemorrhages were found in 7 (19.4%) of the 36 patients with a ventral spinal CSF leak and in none of the 226 patients who did not have such a CSF leak (p < 0.0001). The degree of hemosiderin deposits was variable, ranging from mild involvement of the cerebellar folia to widespread superficial siderosis. Only the 1 patient with superficial siderosis had symptoms due to the hemorrhages. The time period between the onset of symptoms due to spontaneous intracranial hypotension and MR imaging examination was significantly longer in those patients with cerebellar hemorrhage than in those with a ventral spinal CSF leak and no evidence for cerebellar hemorrhage (mean 19.6 years vs 2.3 months, p < 0.0001).

Conclusions
Chronic cerebellar hemorrhage should be included among the manifestations of spontaneous intracranial hypotension. The severity is variable, but the hemorrhage generally is asymptomatic. The underlying spinal CSF leak is ventral and mostly of long duration.
Trends in the treatment of lumbar spine fractures in the United States: a socioeconomics perspective
Authors: Baaj Ali A. , Downes Katheryne , Vaccaro Alexander R. , Uribe Juan S. , Vale Fernando L. 
Published: July 2011

Object
The objective of this study was to investigate a national health care database and analyze demographics, hospital charges, and treatment trends of patients diagnosed with lumbar spine fractures in the US over a 5-year period.

Methods
Clinical data were derived from the Nationwide Inpatient Sample (NIS) for the years 2003 through 2007. The NIS is maintained by the Agency for Healthcare Research and Quality and represents a 20% random stratified sample of all discharges from nonfederal hospitals within the US. Patients with lumbar spine fractures were identified using the appropriate ICD-9-CM code. Data on the number of vertebral body augmentation procedures were also retrieved. National estimates of discharges, hospital charges, discharge patterns, and treatment with spinal fusion trends were retrieved and analyzed.

Results
More than 190,000 records of patients with lumbar spine fractures were abstracted from the database. During the 5-year period, there was a 17% increase in hospitalizations for lumbar spine fractures. This was associated with a 27% increase in hospital charges and a 55% increase in total national charges (both adjusted for inflation). The total health care bill associated with lumbar spine fractures in 2007 exceeded 1 billion US dollars. During this same time period, there was a 24% increase in spinal fusions for lumbar fractures, which was associated with a 15% increase in hospital charges. The ratio of spinal fusions to hospitalizations (surgical rate) during this period, however, was stable with an average of 7.4% over the 5-year period. There were an estimated 13,000 vertebral body augmentation procedures for nonpathological fractures performed in 2007 with a total national bill of 450 million US dollars.

Conclusions
An increasing trend of hospitalizations, surgical treatment, and charges associated with lumbar spine fractures was observed between 2003 and 2007 on a national level. This trend, however, does not appear to be as steep as that of surgical utilization in degenerative spine disease. Furthermore, the ratio of spinal fusions to hospitalizations for lumbar fractures appears to be stable, possibly indicating no significant changes in indications for surgical intervention over the time period studied.
Outcomes of fusion surgery for ossification of the posterior longitudinal ligament of the thoracic spine: a multicenter retrospective survey
Authors: Matsumoto Morio , Toyama Yoshiaki , Chikuda Hirotaka , Takeshita Katsushi , Kato Tsuyoshi , Shindo Shigeo , Abumi Kuniyoshi , Takahata Masahiko , Nohara Yutaka , Taneichi Hiroshi , Tomita Katsuro , Kawahara Norio , Imagama Shiro , Matsuyama Yukihiro , Yamazaki Masashi , Okawa Akihiko 
Published: July 2011

ObjectThe aim of this study was to evaluate the outcomes of fusion surgery in patients with ossification of the posterior longitudinal ligament in the thoracic spine (T-OPLL) and to identify factors significantly related to surgical outcomes.MethodsThe study included 76 patients (34 men and 42 women with a mean age of 56.3 years) who underwent fusion surgery for T-OPLL at 7 spine centers during the 5-year period from 2003 to 2007. The authors evaluated the patient demographic data, underlying disease, preoperative comorbidities, history of spinal surgery, radiological findings, surgical methods, surgical outcomes, and complications. Surgical outcomes were assessed using the Japanese Orthopaedic Association (JOA) scale score for thoracic myelopathy (11 points) and the recovery rate.ResultsThe mean JOA scale score was 4.6 ± 2.1 points preoperatively and 7.7 ± 2.5 points at the time of the final follow-up examination, yielding a mean recovery rate of 45.4% ± 39.1%. The recovery rates by surgical method were 38.5% ± 37.8% for posterior decompression and fusion, 65.0% ± 35.6% for anterior decompression and fusion via an anterior approach, 28.8% ± 41.2% for anterior decompression via a posterior approach, and 57.5% ± 41.1% for circumferential decompression and fusion. The recovery rate was significantly higher in patients without diabetes mellitus (DM) than in those with DM. One or more complications were experienced by 31 patients (40.8%), including 20 patients with postoperative neurological deterioration, 7 with dural tears, 5 with epidural hematomas, 4 with respiratory complications, and 10 with other complications.ConclusionsThe outcomes of fusion surgery for T-OPLL were favorable. The absence of DM correlated with better outcomes. However, a high rate of complications was associated with the fusion surgery.
Paysages agraires et centuriations dans le bassin de l'oued Tine (Tunisie du Nord)
Authors: Peyras Jean 
Published: July 2011

L'auteur étudie, dans le cadre de ce bassin situé à une soixantaine de kilomètres de Carthage, les relations qui existaient entre les paysages agraires antiques et la centuriation du Nord tunisien. Dans la première partie, il montre, à l'aide de cartes, de photographies aériennes et de relevés archéologiques, que le parcellaire régulier couvrait 48 centuries, que les lots allaient de un heredium à quatre heredia, qu'ils étaient limités par des ruisseaux, des murettes ou marqués par le défoncement de la croûte calcaire sous-jacente.
La seconde partie est consacrée à la confrontation du cadastre antique et de diverses variables : les parcelles régulières n'existent que sur les pentes de 3 à 10 % ; elles occupent seulement des sols rouges, peu profonds, limoneux, bien structurés, bien drainés, reposant sur une croûte calcaire ; les enclos portaient des plantes annuelles aussi bien que des vignes, des oliviers ou des arbres fruitiers. La houe et l'araire simple ont été les principaux instruments de mise en valeur de terrains qui ne connaissaient pas de véritable irrigation ; les exploitations, de dimension moyenne, pouvaient être détenues par des possessores indépendants, mais aussi par des colons inclus dans un grand domaine.
Dans la troisième partie, J. Peyras avance que le parcellaire régulier et dense issu de la centuriation nord que nous avons sous les yeux n'est pas un fragment de celui qui existait dans l'Antiquité. Il correspond à ce qui a été mis en place au lendemain de la conquête romaine. Par contre, les dépressions marécageuses, la réserve du Fundus Aufidianus et, peut-être, une part des lots irréguliers, n'ont été réellement cultivées qu'à partir de la 2e moitié du IIe siècle de notre ère.
Les exploitants de cette époque ont négligé la trame ancienne et ont organisé le terrain à leur guise. Il faut donc mettre en évidence deux grands moments dans la constitution des paysages agraires antiques :
1) La formation d'un agrosystème basé sur la complémentarité des montagnes, des versants et des plaines. Il est créé par une société agropastorale dès le néolithique. Le parcellaire régulier républicain s'insère dans ce système sans le bouleverser.
2) L'occupation de toutes les terres disponibles aux IIe et IIIe siècles ap. J.-C. Elle correspond à l'urbanisation, à l'autonomie municipale, au grand réseau routier.
Chemin faisant, l'auteur est amené à réexaminer diverses questions, en particulier celles qui concernent le Fundus Aufidianus et les populi leiberi de la lex agraria de 111 av. J.-C.
A propos du cavalier de Simitthus (Chemtou)
Authors: Bertrandy François 
Published: July 2011

Une stèle anépigraphe, découverte en Tunisie, près de Chemtou (Simitthus) présente un cavalier qui en raison de sa chevelure calamistrée a une origine numide indiscutable. Cependant on est frappé par le fait qu'il monte sur une selle aux arçons bien marqués et que son cheval est bridé. Cela va en rencontre des figurations connues de cavaliers numides et africains. Ceux-ci ont, en effet, la particularité de monter à cru ainsi que le mentionnent tous les textes anciens et qu'on le voit encore, au début du IIe siècle après J.C., avec la cavalerie maure de Lusius Quiétus sur la colonne trajane.
Mais ce cavalier porte un diadème, ce qui interdit de l'identifier comme un simple cavalier recruté en Afrique pour faire partie, par exemple, d'une aîle de cavalerie auxiliaire. En raison de comparaisons possibles avec des monnaies et une tête du Musée du Louvre le représentant, on avancera que ce relief figure le roi Iuba Ier. Tout en étant jaloux de l'indépendance de la Numidie, ce roi a pourtant ouvert son pays à l'influence romaine (monnayage, organisation et équipement de son armée). Il aurait pu adopter pour lui-même selle et harnachement étrangers. La stèle serait donc datée de la fin de son règne, entre 50 et 46 avant J.C.
Figurines et lampes africaines
Authors: Deneauve Jean 
Published: July 2011

Parmi les diverses productions de terres cuites et de céramique de l'Afrique romaine, un groupe de figurines paraît remarquable tant par ses qualités techniques que par la diversité des sujets puisés dans la mythologie, les scènes de genre, les festins, les divers genres de spectacle, les animaux.
Plusieurs marques de fabrique rattachent ces figurines à la production des lampes du IIP siècle. Cette datation est encore confirmée par la représentation de coiffures féminines reproduisant la mode de l'époque de Julia Domna.
Certaines de ces figurines ont été traitées dès l'origine de manière à pouvoir servir de lampe, d'autres ont été transformées en lampe par le percement des orifices nécessaires à leur fonctionnement comme luminaire.
La diffusion de ces figurines paraît beaucoup plus limitée que celle des lampes issues des mêmes ateliers.
Pour une nouvelle lecture de l'elogium de Masties
Authors: Morizot Pierre 
Published: July 2011

Der Dux Masties hat wohl den Titel von Imperator getragen, jedoch zehn und nicht vierzig Jahre lang. Es ist wohl Vartaia, der die Kosten des zu deren Ehre in dem Aures errichteten Monumenten getragen hat ; dieses hat 100 Siliquen und nicht 100 Denaren gekostet, ein für seine Zeit durchaus üblicher Preis.
Diese sind die Schlüsse, die sich dem Verfasser beim Betrachten der neuesten photographischen Bilder der Arris- Inschrift aufgedrängt haben. Das « Reich » des Masties ist wahrscheinlich in den allerletzten Jahren des vandalischen Königreiches anzusetzen. Die paleographische Analyse, der Stil der Inschrift, der historische Kontext und insbesondere die von J. Carcopino vorgeschlagene und von C. Courtois anerkannte Identifikation des Vartaia mit dem Ortaias von Procop erlauben diesen Gedanken. Dieser Masties, wahrscheinlich kurz nach der byzantinischen Rückenoberung gestorben, ähnelt sehr dem Mastigas, der zu dieser Zeit eine quasi uneingeschränkte Macht über Mauretanien ausübte ; wie der in Arris gelobte Imperator hat Mastigas, den man nicht mit Mastinas, Herr der Barbaren von Mauretanien, verwechseln darf, sein den Byzantinern gegebene Wort nicht verletzt und es gibt keinen Anhaltspunkt dafür, daß er sich an den zwischen den maurischen Häuptlinge häufigen Zänkereien beteiligt hätte. Auf der anderen Seite, wenn man die heutige Aussprache in den berberischen Dialekten der Küste (der Kabyle) und des Inneren (der Chauia) für gleichlautende Wörter heranzieht, gibt es kaum ein phonetischer Unterschied zwischen Mastigas und Masties. Letztlich, wenn diese zwei Gestalten die gleiche Person wären, würde man das Schweigen von Procop, dem wir unsere Kenntnis von Mastigas danken, über den quasi-gleichnamigen Imperator Masties verstehen.