bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of a Strict ‘No-Talking’ Policy During Intravitreal Injection on Post-Injection Endophthalmitis
Authors: Garg Sunir J. , Dollin Michael , Hsu Jason , Storey Philip , Vander James F.
Published: November 2015

BACKGROUND AND OBJECTIVE:

To report the effect of a “no-talking” policy during intravitreal injection (IVI) on post-injection endophthalmitis.

PATIENTS AND METHODS:

Retrospective, comparative, consecutive case series of patients receiving IVI between Jan. 1, 2009, and Dec. 31, 2012. A 24-month “usual care” period was compared to a 24-month no-talking period, during which a strategy to further minimize speech during IVI was implemented.

RESULTS:

During the usual care period, 47,155 IVIs were performed, with nine culture-positive cases (0.019%), including seven due to oral pathogens (0.015%). During the no-talking period, 82,658 IVIs were performed, with eight culture-positive cases (0.010%), including two due to oral pathogens (0.002%). The no-talking policy was associated with a decreased endophthalmitis risk (
P
= .004), including oral pathogen-associated endophthalmitis (
P
= .02).

CONCLUSION:

This study demonstrates that a more stringent no-talking policy during IVI may reduce the risk of post-injection endophthalmitis.

[
Ophthalmic Surg Lasers Imaging Retina
. 2015;46:1028–1034.]
Optical Coherence Tomography Angiography Compared to Fluorescein Angiography in Branch Retinal Artery Occlusion
Authors: de Castro-Abeger Alexander H. , de Carlo Talisa E. , Duker Jay S. , Baumal Caroline R.
Published: November 2015

A case of embolic branch retinal artery occlusion (BRAO) was evaluated utilizing both fluorescein angiography (FA) and novel optical coherence topography angiography (OCTA). OCTA demonstrated a well-demarcated area of flow interruption secondary to the retinal artery embolus, as well as capillary nonperfusion in the involved region corresponding to FA findings. Therefore, OCTA can demonstrate vascular features of embolic BRAO correlating to FA findings. In this case, OCTA also revealed an increased perfusion defect in the superficial vascular capillary plexus that was not seen on FA.

[
Ophthalmic Surg Lasers Imaging Retina
. 2015;46:1052–1054.]
Synopsis of Acalypha L. (Euphorbiaceae) of Peru and Bolivia, with description of a new species
Authors: Cardiel José María , Nee Michael , Muñoz Rodríguez Pablo
Published: November 2015

A critical review of the Peruvian and Bolivian species of Acalypha L. (Euphorbiaceae) is presented. As a result 41 species (42 taxa) are accepted, 31 from Peru and 28 from Bolivia, and 94 names are considered synonyms. A new species is described and illustrated, A. psamofila, based on Bolivian material. Comprehensive nomenclatural information is supplied and 36 lectotypes and one neotype are designated. An identification key is also provided, as well as original illustrations of six species and distribution maps of all the accepted species.
Diatom species composition and indices for determining the ecological status of coastal Mediterranean Spanish lakes
Authors: Antón-Garrido Beatriz , Romo Susana , Villena María José
Published: November 2015

Diatom indices have been used and tested mainly for assessing the ecological status of rivers and deep lakes, but there are scarce studies that determine their effectiveness in shallow lakes and in coastal Mediterranean lakes. This study evaluates the validity of several common diatom indices (SPI, BDI, CEC and TDIL) for the determination of the ecological quality of three coastal lakes (Valencia, Spain) and presents descriptions and ecological data of the main diatom species recorded. Diatom samples were collected from phytobenthos, both from epiphyton of the dominant submerged macrophytes and the sediment. The ecological status of the systems was determined according to different physico-chemical variables and was compared with the results obtained from epiphytic diatom communities. The results showed discrepancies among diatom indices and also with the state determined by the environmental variables. The effectiveness of the indices depended on the number of species assessed for each index with respect to the total species recorded and the suitability of the weight assigned to each species. The results reveal the need to gather more information about the composition and ecology of the diatoms and microalgae characteristic of coastal Mediterranean standing waters. This work contributes to their better knowledge.
Fronteras de aire. Portugal, León y Castilla en el siglo XIII
Authors: Romero  Portilla Paz
Published: November 2015

La documentación estudiada refl eja una estrecha vinculación del reino de Portugal con León y Castilla en el siglo XIII. Nos muestra una trayectoria diplomática que tiende a garantizar el equilibrio entre los reinos peninsulares, a pesar de acontecimientos que lo rompen, como la unión de Castilla y León. Difícil siglo para los tres reinos debido a guerras, minorías de edad, problemas con la nobleza, afianzamiento territorial y fronterizo, etc. Pero aspectos históricos, geográficos, sociales, familiares, económicos y eclesiásticos, bien reflejados en los documentos, motivaron, sin duda, una especial relación entre los reinos. Un primer acercamiento a la documentación nos ha evidenciado cuáles fueron los asuntos que vincularon y separaron a Portugal de León y Castilla en la plenitud medieval.

[gl] A documentación estudada reflicte unha estreita vinculación do reino de Portugal con León e Castela no século XIII. Móstranos unha traxectoria diplomática que tende a garantir o equilibrio entre os reinos peninsulares, a pesar de acontecementos que o rompen, como a unión de Castela e León. Difícil século para os tres reinos debido a guerras, minorías de idade, problemas coa nobreza, afianzamento territorial e fronteirizo, etc. Pero aspectos históricos, xeográficos, sociais, familiares, económicos e eclesiásticos, ben reflectidos nos documentos, motivaron, sen dúbida, unha especial relación entre os reinos. Un primeiro achegamento á documentación evidenciounos cales foron os asuntos que vincularon e separaron Portugal de León e Castela na plenitude medieval.
La Capilla Real en el reinado de Juan I de Portugal (1385-1433): el papel de sus clérigos
Authors: Da  Cruz  Coelho Maria Helena
Published: November 2015

A lo largo de estas páginas se estudia a los eclesiásticos al servicio de la Capilla Real de don Juan I de Portugal. En primer lugar, se da a conocer una lista que representa el número y categoría de clérigos que la componían, así como sus respectivos salarios; se detallan las funciones de sus principales miembros, tales como capellán mayor, cantores o limosnero; y se presta especial atención a los confesores del rey reclutados entre los mendicantes, los cuales tenían un papel fundamental tanto en la adopción de las líneas de espiritualidad y devoción de la corte, como también por su proximidad con el rey y la familia real en la política del reino. A continuación, se profundiza en la dimensión político-religiosa de este órgano, poniendo de relieve el peso de estos religiosos próximos al rey, tanto a nivel personal, consiguiendo bienes, cargos, beneficios y privilegios, como en su contribución para la definición y concreción de la política del reino.

[gl] Ao longo destas páxinas estúdase os eclesiásticos ao servizo da Capela Real de don Xoán I de Portugal. En primeiro lugar, dáse a coñecer unha lista que representa o número e categoría de clérigos que a compoñían, así como os seus respectivos salarios; detállanse as funcións dos seus principais membros, tales como capelán maior, cantores ou esmoleiro; e préstase especial atención aos confesores do rei recrutados entre os mendicantes, os cales tiñan un papel fundamental tanto na adopción das liñas de espiritualidade e devoción da corte, coma tamén pola súa proximidade co rei e a familia real na política do reino. A continuación, afóndase na dimensión político-relixiosa deste órgano, poñendo de relevo o peso destes relixiosos próximos ao rei, tanto a nivel persoal, conseguindo bens, cargos, beneficios e privilexios, como na súa contribución para a definición e concreción da política do reino.
Los gallegos en el Perú: la migración de los malpicáns al puerto de Chimbote
Authors: Valverde  Elera José A.
Published: November 2015

El objetivo de este artículo es presentar un breve trabajo histórico con aportes bibliográficos y etnográficos, respecto a la migración de la población del Concello de Malpica de Bergantiños hacia el puerto peruano de Chimbote, en la segunda mitad del siglo anterior, durante los años de bonanza pesquera en este país. Este trabajo es parte de una tesis doctoral en vías de realización denominada Perú y Galicia: la migración antes y ahora. La recopilación de la información se inició a mediados de 2012 en el puerto de Malpica de Bergantiños y continúa a la fecha en Perú. Para este artículo, nos hemos basado en investigaciones previas y en los datos obtenidos de nuestras entrevistas con los mismos actores, quienes han narrado sus experiencias migratorias. Creemos que rescatar la memoria de este proceso migratorio, pone de relevancia una realidad actual y pasada: el desplazamiento de las personas fuera de sus países para buscar mejorar sus condiciones de vida. Pues actualmente en este puerto gallego confluyen dos generaciones de inmigrados, los peruanos que actualmente viven allí y trabajan en la pesca y los malpicáns que años atrás migraron al Perú, donde se les brindó acogida y trabajo.

[gl] O obxectivo deste artigo é presentar un breve traballo histórico con achegas bibliográficas e etnográficas, respecto á migración da poboación do Concello de Malpica de Bergantiños cara ao porto peruano de Chimbote, na segunda metade do século anterior, durante os anos de bonanza pesqueira neste país. Este traballo é parte dunha tese doutoral en vías de realización denominada Perú e Galicia: a migración antes e agora. A recompilación da información iniciouse a mediados de 2012 no porto de Malpica de Bergantiños e continúa á data en Perú. Para este artigo, baseámonos en investigacións previas e nos datos obtidos das nosas entrevistas cos mesmos actores, os cales narraron as súas experiencias migratorias. Cremos que rescatar a memoria deste proceso migratorio, pon de relevancia unha realidade actual e pasada: o desprazamento das persoas fose dos seus países para buscar mellorar as súas condicións de vida. Pois actualmente neste porto galego confl úen dúas xeracións de inmigrados, os peruanos que actualmente viven alí e traballan na pesca e os malpicáns que anos atrás migraron ao Perú, onde se lles brindou acollida e traballo.
Tras la huella del desconocido maestro ciego del Colegio de Sordomudos y Ciegos de Santiago: Juan Lorenzo González (finales del siglo XIX)
Authors: Rodríguez  Díaz Ana , Gavari  Starkie Elisa
Published: November 2015

La difusión del sistema Braille como un medio de comunicación alternativo al visual ha supuesto un factor determinante en la integración de las personas ciegas. El sistema Braille se introdujo en Argentina mediante la enseñanza de Juan Lorenzo González. Este artículo pretende contribuir al conocimiento de este ignorado maestro ciego. A pesar de que en España permaneció eclipsado por otros pedagogos, su personalidad altruista le llevó a instalarse en la ciudad de Buenos Aires, donde desarrolló su mayor obra pedagógica. El 1 de marzo de 1887, recién llegado a dicha ciudad, la dirigente de la Sociedad de Beneficencia de Buenos Aires propuso al pedagogo español como profesor de ciegos en el Asilo de Huérfanos. La propuesta se aceptó con una rápida respuesta, y unos meses después de su nombramiento comenzó su tarea. Fue entonces cuando se inició la atención institucional y profesional de los ciegos en Argentina; hasta aquella fecha los ciegos solo habían recibido sustento material y amparo caritativo. En este estudio, abordado desde una perspectiva histórica y fundamentado en fuentes archivísticas, prensa y publicaciones históricas y actuales (principalmente argentinas), se aportan datos significativos que permiten desvelar algunas de las incógnitas sobre la biografía de esta destacada personalidad.

[gl A difusión do sistema Braille como un medio de comunicación alternativo ao visual supuxo un factor determinante na integración das persoas cegas. O sistema Braille introduciuse en Arxentina mediante o ensino de Juan Lorenzo González. Este artigo pretende contribuír ao coñecemento deste ignorado mestre cego. A pesar de que en España permaneceu eclipsado por outros pedagogos, a súa personalidade altruísta levouno a instalarse na cidade de Bos Aires, onde desenvolveu a súa maior obra pedagóxica. O 1. º de marzo de 1887, recén chegado á devandita cidade, a dirixente da Sociedade de Beneficencia de Bos Aires propuxo o pedagogo español como profesor de cegos no Asilo de Orfos. A proposta foi aceptada cunha rápida resposta e, uns meses despois do seu nomeamento, comezou a súa tarefa. Foi neste momento cando se iniciou a atención institucional e profesional dos cegos en Arxentina; ata entón os cegos só recibiran sustento material e amparo caritativo. Neste estudo, abordado dende unha perspectiva histórica fundamentado en fontes arquivísticas, prensa e publicacións históricas e actuais, principalmente arxentinas, achéganse datos significativos que permiten desvelar algunhas das incógnitas sobre a biografía desta destacada personalidade.
Toda historia lleva implícita una antropología. Una indagación en la historia del pensamiento occidental
Authors: Cardesín  Díaz José María
Published: November 2015

¿Por qué constituyen antropología e historia dos disciplinas separadas, de cuándo data esa separación, cuál es el grado de permeabilidad que se registra entre ambas? Estas son las preguntas que intentaré responder en este artículo. Centraré mi argumentación en tres cuestiones. La primera, que dado que la antropología es un “logos” acerca del “anthropos”, podemos argumentar que no puede existir historia carente de antropología: es lo que intentaremos mostrar en un breve recorrido por la historia del pensamiento occidental, desde la Grecia Clásica a la Ilustración. A continuación analizaremos cómo antropología e historia se enfrentaron al problema del cambio social en el siglo XIX, se diferenciaron como disciplinas académicas a finales de siglo y parecieron “cortar amarras” en el periodo de entreguerras, en las décadas de 1920 y 1930. Pero, aún en esas difíciles circunstancias, algún tipo de comunicación siempre se mantuvo entre ambas. De los dos primeros puntos se deduce un tercero: que es importante llegar a entender la antropología que subyace, siempre, en los escritos de los grandes historiadores que han sido nuestros maestros. Buscaremos ejemplos en sendas tradiciones historiográficas: la francesa Escuela de los Annales y la historiografía británica.

[gl] Por qué constitúen antropoloxía e historia dúas disciplinas separadas, de cando data esa separación, cal é o grao de permeabilidade que se rexistra entre ambas as dúas? Estas son as preguntas as que intentarei buscar resposta neste artigo. Centrarei a miña argumentación en tres cuestións. A primeira, que dado que a antropoloxía é un “logos” acerca do “anthropos”, podemos argumentar que non pode existir unha historia carente de antropoloxía: é o que intentaremos amosar nun breve percorrido pola historia do pensamento occidental, dende a Grecia Clásica á Ilustración. A continuación analizaremos como antropoloxía e historia enfrontáronse ao problema do cambio social no século XIX, diferenciáronse como disciplinas académicas a finais de século e pareceron “cortar amarras” no período de entreguerras, nas décadas de 1920 e 1930. Mais, aínda nesas difíciles circunstancias, algún tipo de comunicación sempre se mantivo entre elas. Dos primeiros puntos dedúcese un terceiro: que resulta importante chegar a entender a antropoloxía que está agachada, sempre, nos escritos daqueles grandes historiadores que teñen sido os nosos mestres. Buscaremos exemplos en sendas tradicións historiográficas: a francesa Escola dos Annales e a historiografía británica.
Confirmación de la reproducción de Rivetina baetica (Rambur, 1838) (Mantodea), una especie termófila, en áreas continentales del centro de España
Authors: Sánchez-Vialas Alberto , Rodríguez-Flores Paula C. , García-París Mario
Published: November 2015

La presencia de una población de Rivetina baetica baetica, un taxon típicamente litoral endémico de las regiones más meridionales de España y Portugal, fue estudiada durante dos periodos de reproducción consecutivos en un área esteparia continental de España Central. La reproducción tuvo éxito, lo que representa una extensión considerable del área de distribución conocida. Adicionalmente, se revisó la colección entomológica del Museo Nacional de Ciencias Naturales (MNCN, Madrid) y los registros bibliográficos disponibles. Recuperamos el único registro publicado de R. baetica en Portugal elevando a 12 el número de especies conocidas en la lista actual de especies portuguesas. Nuestras observaciones demuestran que la especie es capaz de sobrevivir a las bajas temperaturas invernales de la meseta manchega (Ciudad Real).
Carbones pobres. Estado de los estudios experimentales sobre la llama
Authors: Editorial Equipo
Published: November 2015

Not available
Cementos y cales hidráulicas del Norte, S.A., en Haubourdin. Diagramas de cocción
Authors: Editorial Equipo
Published: November 2015

Not available
Carbones pobres. Resumen sobre los diferentes problemas relacionados con los anillos. Conferencia pronunciada en el Instituto Técnico de la Construcción y del Cemento el día 30 de Abril de 1959
Authors: Dussossoy P.
Published: November 2015

Not available
Prensa automática para moldear azulejos
Authors: Harding R. S. , Gilson A. N.
Published: November 2015

Not available
Mortars for jointing
Authors: Editorial Equipo
Published: November 2015

Not available
Forma de apreciar la importancia de una fisura
Authors: Editorial Equipo
Published: November 2015

Not available
Un nuevo tipo de horno para cocción rápida
Authors: Editorial Equipo
Published: November 2015

Not available
Los álcalis en la estructura del clínker de cemento portland
Authors: Calleja J.
Published: November 2015

Not available
¿Por qué deben conservarse bajas las temperaturas de la molienda?
Authors: Takemoto K. , Ito I. , Hirayama K.
Published: November 2015

Not available
Valoración del radical lignin-sulfónico en los plastificantes comerciales
Authors: Francadi M. T.
Published: November 2015

Not available
Dispositivos de descarga de cisternas para inodoros
Authors: Laorden José , Muñoz Rafael
Published: November 2015

Not available
Factores a tener en cuenta en la granulación de crudos para la fabricación de cemento
Authors: Tonry J. Richard
Published: November 2015

Not available
Los recubrimientos de plásticos como defensa de los tubos de hormigón frente a la corrosión ejercida por suelos y aguas agresivas
Authors: Editorial Equipo
Published: November 2015

Not available
Aspecto económico financiero del momento actual en relación con la industria del cemento
Authors: Vizoso A.
Published: November 2015

Not available
Aspectos de la evolución de la industria italiana del cemento durante el último quinquenio (1955-1959)
Authors: Malquori Giovanni
Published: November 2015

Not available
Sugerencias al pliego de condiciones
Authors: Uría López Juan José
Published: November 2015

Not available
Tendencias actuales en la construcción de maquinaria para la fabricación de cemento
Authors: Bellwinkel A.
Published: November 2015

Not available
Contribución al análisis rápido en la industria del cemento
Authors: Buzzi Sandro
Published: November 2015

Not available
Efecto del polvo de los hornos de cementos sobre plantas y animales
Authors: Pajenkamp H.
Published: November 2015

Not available
Examen sobre la compactación del hormigón sobre mesas de sacudidas en moldes fijos y móviles
Authors: Walz K.
Published: November 2015

Not available
La composición de los cementos puzolánicos y su resistencia a las aguas sulfatadas
Authors: Río A. , Celani A. , Angeletti L.
Published: November 2015

Not available
Los problemas del polvo y del desempolvado en los hornos verticales de cemento
Authors: Funke G.
Published: November 2015

Not available
Un método rápido para determinar la resistencia a los sulfatos de los cementos
Authors: Koch A. , Steinegger H.
Published: November 2015

Not available
Medidas de la estabilidad de la carcasa de los hornos de rotación "shell"
Authors: Hilber H.
Published: November 2015

Not available
Principios de la termofísica del horno vertical de cemento
Authors: Eigen H.
Published: November 2015

Not available
Conferencia de R. Blachère en el Instituto Eduardo Torroja de la Construcción y del Cemento
Authors: Blachère R.
Published: November 2015

Not available
Nuevas interpretaciones de antiguos conceptos sobre el terreno como soporte de firmes blancos
Authors: Rocci Sandro
Published: November 2015

Not available
La mayor fábrica de cemento del mundo
Authors: Editorial Equipo
Published: November 2015

Not available
El revestimiento refractario en la industria del cemento
Authors: Sarabia Antonio
Published: November 2015

Not available
Aclaraciones sobre compactación, compactibilidad y los ensayos de proctor
Authors: Rocci Sandro
Published: November 2015

Not available
Elaboración y posterior tratamiento del hormigón a bajas temperaturas
Authors: Meyer A.
Published: November 2015

Not available
Hormigón en aguas y terrenos agresivos
Authors: García de Paredes y Gaibrois Pablo
Published: November 2015

Not available
Perforadora de suelos
Authors: Chinchilla M.
Published: November 2015

Not available
Nuevo calentador de rayos infrarrojos para juntas
Authors: Chinchilla M.
Published: November 2015

Not available
Una clasificación de suelos, basada en la granulometría, en relación con su aptitud para la mezcla con cemento
Authors: Rocci Sandro
Published: November 2015

Not available
Fabricación de mallazo electrosoldado para armaduras de hormigón armado
Authors: Chinchilla M.
Published: November 2015

Not available
La producción de árido ligero hueco por precalentamiento controlado
Authors: Stamboliev Hristo
Published: November 2015

Not available
Acabadora A. B. G. tipo (H. F.)
Authors: Chinchilla M.
Published: November 2015

Not available
Desarrollo tecnológico de la industria del cemento
Authors: Bogui R. H.
Published: November 2015

Not available
Mortero para reparaciones rápidas en suelos de talleres y escaleras
Authors: Editorial Equipo
Published: November 2015

Not available
Problemas de construcción y de explotación· de los grandes hornos rotatorios por vía seca
Authors: Münk R.
Published: November 2015

Not available
Influencia del polvo del horno de cemento sobre plantas y animales
Authors: Pajenkamp H.
Published: November 2015

Not available
Case history: integrated geophysical survey at Katarínka Monastery (Slovakia)
Authors: Wilken D. , Wunderlich T. , Stümpel H. , Rabbel W. , Pašteka R. , Erkul E. , Papčo J. , Putiška R. , Krajňák M. , Kušnirák D.
Published: November 2015

Katarínka (St. Catherine) is the ruin of an abandoned Franciscan monastery from the early 17th century located in the western Small Carpathians in Slovakia. Historical sources and paintings suggest that, beside the remains of the monastery that are still visible, a circle of eight chapels, a pilgrim’s hospice, a cemetery, and garden terraces originally surrounded the main building of the monastery. From 2009 to 2012, geophysical campaigns were performed to find evidences and positions of remains of these buildings of the monastery campus. An initial magnetic overview survey revealed multiple local accumulations of disordered dipole anomalies. Since these accumulations did not allow a structural interpretation, ground penetrating radar measurements were conducted. The ground penetrating radar results clearly showed wall structures beneath almost all magnetic anomaly accumulations. In between the remains of the monastery main building, ground penetrating radar and electrical resistivity tomography were performed at different areas that were difficult to access because of a strong cover of vegetation and steep topography.
Evaluation of Stability in Railway Vehicles on Basis of Bogie Lateral Acceleration
Authors: Dumitriu Mădălina , Crăciun Camil
Published: November 2015

The paper focuses on evaluating the stability of the railway vehicle during running on a track horizontal irregularities and investigating the possibilities to improve the dynamic behavior on a lateral direction. The evaluation method for the stability relies on the homologation specifications of the railway vehicles from the perspective of the dynamic behavior included in the UIC 518 Leaflet, where the lateral accelerations of the bogies represent evaluation units for the stability. The lateral accelerations are derived from numerical simulations, developed on a non-linear complex model of the vehicle/track system, where the vehicle is described by a mechanical system with 21 degrees of freedom. The results thus presented outline the possibilities of improving the vehicle stability by adopting the best values of the lateral damping of the secondary suspension or of the lateral stiffness of the primary suspension that will lead to the minimizing of the lateral acceleration in a bogie.
Effect of Chemical Exploitation Preparation on the Tribological Properties of CuSn10 Bronze within the Friction Process
Authors: Adamczuk Krzysztof , Legutko Stanislaw , Krolczyk Grzegorz M. , Maruda Radoslaw W.
Published: November 2015

The paper presents results of tribological properties of the kinematic pair: X210Cr12 steel / CuSn10 bronze, lubricated within the friction process by engine oil SAE 20W/40, and by the same lubricant modified by chemical exploitation preparation. Research of tribological properties were carried out using the tester T-05 (type tester roll - block). Tests have been carried out in two stages. In the first order - friction force, wear of the kinematic pair and the temperature of the friction area have been determined. The objective of the second phase was to micro roentgen spectral analysis of the surface friction zone. On the basis of these studies, the analysis of the elemental composition of the surface layer in the track wear have been made. The modification purposefulness of lubricant SAE 20W/40 by chemical exploitation preparation has been shown.
The Influence of the Suspension on the Phenomena of Wheel-Rail Contact
Authors: Sebeşan Ioan , Ştefan Valeriu
Published: November 2015

Efficient use of adhesion between wheels and rails involves a good knowledge of this phenomenon, in order to equip the vehicle with adequate facilities and systems that protect the vehicle and the rail. The loading of the vehicle's axle with dynamic loads in vertical and horizontal planes, are to be developed in the area of contact, both normal stress and shear distributed stress, their sum giving the friction force and the moment of pivoting friction (spin). This makes the wheel-rail contact problems take the two aspects of the study, namely the problem of normal and tangential contact issue. The normal contact problem involves regular geometric shape bodies, determining the size of the resulting contact surface, the distribution of the normal contact pressures and the relationship between the proximity of the bodies and the normal contact force. Solving the problem of the tangential wheel-rail contact is about to establish the correlation between the creepage, normal contact forces and friction forces, and also the ratio between the adherent contact surface and the nominal contact surface where the creepage ocurs.
The Vertical Forces Introduced by Wind on the Active Pantograph from Bodywork of Locomotive LE 060 EA of 5100 kW
Authors: Arsene Sorin
Published: November 2015

Gusts of wind with high speed can adversely affect the operation of the electric railway vehicles. These vehicles are able to move and to obtain a high performance, as long as the power supply is ensured. The variation of the vertical forces for maintaining contact between pantograph and catenary may cause interruption of the power supply of the electric railway traction vehicles. The placement of the capture equipment on the vehicle body determines appearance of aerodynamic forces acting on it. To see which are the vertical forces introduced by wind on active capture equipment, used at locomotives LE 060 EA of 5100 kW, we considered the EP3 type of pantograph as model. This was modelled at scale 1:1 taking into account the placement on the body of the locomotive. For the simulation of wind we considered three point values of its speed (10 m/s, 20 m/s, 30 m/s) and angle of eight values that are within the range of 0 deg – 180 deg. With the results of the simulation we have done a comparative analysis on the additional vertical forces introduced by wind for the cases analyzed.
Static Analysis on Computer for Requests that Appear at Elements of the Pantograph of Type EP3
Authors: Arsene Sorin , Sebeşan Ioan , Popa Gabriel
Published: November 2015

Currently much of the specialized programs in computer aided design (CAD) have incorporated into their structure a module of simulation and analysis. With these modules it can be simulated the operation of the various drawings equipment in the 3D format and to analyze critical areas of its. Using these modules allows a quick assessment of design to equipment’s. This paper presents a finite element static analysis on current collector components used on the locomotive LE 060 EA used in Romania. It’s considered the situation given by EP3 pantograph located at maximum height.
Wear Behavior of Polyester – Carbon Nanotubes Composites under Dry Sliding Ball-on-Flat Reciprocating Test
Authors: Cotet Adrian , Ciupagea Luminita , Dima Dumitru , Andrei Gabriel
Published: November 2015

Friction coefficient and linear wear rate of polyester-carbon nanotubes composites were investigated through ball-on-flat reciprocating test, under dry sliding contact. Three types of nanoscopic fillers were used: multiwall carbon nanotubes (MWCNT), functionalized multiwall carbon nanotubes (MWCNT-COOH) and singlewall carbon nanotubes (SWCNT), with three values of weight content 0.1, 0.15 and 0.2 wt%. Comparative analysis was done for polyester and its composites tested over 14 m sliding distance, under three values of load, 30 N, 40 N and 50 N. Composites containing MWCNT underwent a decrease in friction coefficient and linear wear rate only in case of 50N loading. An improvement of wear behavior under 50N loading was obtained for the composite with 0.10 wt% functionalized carbon nanotubes. Generally, better values of wear rate at 50 N loading were recorded in case of composites with 0.15 wt% and 0.20 wt% MWCNT and SWCNT, respectively. Optical and electronic investigation of the worn surfaces revealed the occurrence of abrasive, adhesive and fatigue wear. Abrasive wear is due to the hard particles detached from the counterpart which produce scratches and furrows on sliding track. Adhesive wear results when soft particle of polymer are caught and blocked among the asperities of counterpart, and it develops over a local area, being influenced by temperature rise. Fatigue and abrasive wear are responsible for the formation of the 3rd body between contacting parts which affects the friction and wear behavior. Morphological analysis of worn surface showed the rise of transfer film that induces instability of wear parameters.
Application of the Method Based on Knowledge and Experience for Adding the Cutting Tools and Parameters Selection
Authors: Ociepka Piotr , Herbuś Krzysztof
Published: November 2015

The paper presents the method basing on engineering knowledge and experience for adding selection of cutting tools and parameters in a turning process. In this method, the system is built basing on a hybrid architecture that combines an advisory system and the CBR (Case Based Reasoning) method. It is presented the structure of the advisory system, and the functioning of the CBR method. Attention has been paid to the problem of an “empty database” in relation to systems basing on the CBR method. The paper also presents the possibility of integrating the developed method with a CAM system.
The Study of Applying a Quality Management Tool for Solving Non-Conformities in a Automotive
Authors: Luca Liliana
Published: November 2015

The paper presents the results of a study concerning the use of the Ishikawa diagram in analyzing the causes that determine a non-quality problem in the operation of a automotive. The studied problem was “the pressure loss on the high pressure branch in the diesel supply system of the COMMON RAIL motor”. All the possible, main and secondary causes that could generate the studied problem were identified. We determined many possible causes and potential sub-causes and we grouped them into three main causes of the defect: a) causes determined by errors of fabrication/ manufacturing of system components; b) causes determined by faulty exploitation of the automotive; c) causes determined by inappropriate service. We regrouped all the secondary causes in categories of M type and there resulted: 5 categories of secondary causes of repairs in Service which included the use of spare parts with manufacturing errors, conventionally noted MS (Man-service, Methods-service, Materials-service, Machines-service, Environment-service);2 categories of secondary causes due to the operating mode of the motor car, conventionally noted ME (Materials-exploitation, Man-exploitation). All causes and secondary causes described a new Ishikawa diagram, model named in the paper 5MS + 2ME. This diagram performed in a detailed form is presented in the paper.
Unit Package Opening Design for the Elderly by Applying the Principles of Universal Design
Authors: Butlewski Marcin
Published: November 2015

The elderly suffer considerable discomfort due to inadequate adaptation of everyday objects to their needs. This problem will grow in the future due to demographic changes and the increasing proportion of elderly people in society. Because of weakening with age muscle strength, as well as a decline in psychomotor coordination, activities such as opening bottles or handling keys become problematic. The problem is exacerbated in particular in the case of packages which need to safeguard against leakage or unauthorized opening e.g., by children, as they must have a high level of difficulty in opening (through considerable strength or manual dexterity). In turn, due to the cohort problem existing data cannot be directly used and an apparatus for the collection of relevant data must be constructed. To solve the problem, a method of biomechanical modeling enriched with the heuristic approach in the field of developing solutions to facilitate the opening of packaging is assumed, and the development of which is grounded in the principles of universal design. The article contains a summary of the existing solutions facilitating the opening of packages as well as allowing to obtain data in this respect for the elderly. As a result, a universal design enriched with principles of solving technical conflicts is presented.
Study of the Influence of Measurement Uncertainty on the Sorting of Machined Parts
Authors: Toteva Pavlina , Vasileva Dimka
Published: November 2015

The basis of effective and efficient production are the measurements. Manufacturing processes should meet the accuracy requirements to produce fit products. Processes capabilities are determined (estimated) and managed by measurements and not at least the suitability of the products are also found by measurements.
The measurement technique is considered as a factor associated with costs without taking part in the creation of added value. As a logical consequence is offered to reduce the measurements in order to reduce costs, according to the possibilities, but this leads to increasing of defects in production. This expensive and sometimes fatal consequences of this mentality are not reported. Processes and products are evaluated incorrectly. The number of errors and the expenses increase.
A Generic Ontology for Product Structuring
Authors: Petrovan Adrian , Lobonţiu Gabriela , Ravai-Nagy Sandor
Published: November 2015

Product development requires certain activities which are based on reasoning, logic, structure, etc. and which is using large quantities of knowledge. Transiting successive well-defined stages is transforming market requirements into products or merchantable services. New product development requires the creation and evaluation of product development strategy, the organization and product concept generation, designing, testing and validation of product design, its manufacture, marketing and ensuring the product warranty and post-warranty service. The interest of an ontological approach is now well documented in the literature, especially related to clarifying, formalizing and standardizing the conceptual entities within a domain of discourse. The work presented here aims at designing a generic ontological model of the product structuring models’ domain, suitable to be easily extended to cover the many sub-domains of PD, thus facilitating the design of such application ontologies in the future, and their implementation in CAx platforms and data management systems.
Investigating the Effect of Cutting Speed Variation on Surface Roughness of 7136 Aluminum Alloy in End Milling
Authors: Bonţiu Pop Alina Bianca , Lobonţiu Mircea
Published: November 2015

Surface quality is affected by various processing parameters and inherent uncertainties of the metal cutting process. Therefore, the surface roughness anticipation becomes a real challenge for engineers and researchers. In previous researches [1] I have investigated the feed rate influence on surface roughness and manufacturing time reduction. The 7136 aluminum alloy was machined by end milling operation using standard tools for aluminum machining. The purpose of this paper is to identify by experiments the influence of cutting speed variation on surface roughness. The scientific contribution brought by this research is the improvement of the end milling process of 7136 aluminum alloy. This material is an aluminum alloy developed by Universal Alloy Corporation and is used in the aircraft industry to manufacture parts from extruded profiles. The research method used to solve the problem is experiment. A range of cutting speeds was used while the cutting depth and the feed per tooth were constrained per minimum and maximum requirements defined for the given cutting tool. The experiment was performed by using a 16 mm End milling cutter, holding two indexable cutting inserts. The machine used for the milling tests was a HAAS VF2 CNC. The surface roughness (response) was measured by using a portable surface roughness tester (TESA RUGOSURF 20 Portable Surface Finish Instrument). Following the experimental research, results were obtained which highlight the cutting speed influence on surface roughness. Based on these results we created roughness variation diagrams according to the cutting speed for each value of feed per tooth and cutting depth. The final results will be used as data for future research.
The Influence of Manufacturing and Material Quality on Space Maintainers Longevity
Authors: Mârţu Ioana , Luchian Ionuţ , Dănilă Cătălina , Mârțu Cristian , Bârcă Eduard , Beldiman Maria Antonela
Published: November 2015

Premature loss of temporary teeth, both the lateral and the frontal area can have unfavorable consequences on the development of permanent dentition, the support serving to maintain space for permanent teeth eruption in the dental arches. The aim of the study was assessment of different types of fixed and removable space maintainers in terms of their longevity in the dental arches that were applied as interceptive orthodontic treatment for edentulous space management transiently due to premature loss of deciduous teeth. The study followed the evolution of space maintainers properly applied to clinical cases that required these therapeutic options, and appreciated the success rate and the failure of these devices, important being the time at which the assessments were made. Findings failure rate of applied space maintainers was reported to the main causes that could lead to remove the devices: loss of space maintainers, especially those removable, fracturing both fixed and removable devices, loosening orthodontic rings and of course, taking into account the absence of some subjects at periodic reassessment meetings. The space maintainer was considered a success when it fulfill the main role for which it was applied - transitional management of edentulous space, and then being removed when the permanent succession tooth eruption occurred.
Applying Quality Tools for Managing the Production of Automotive Parts
Authors: Mihail Laurentiu Aurel
Published: November 2015

The paper presents a frame for applying the core tools for managing the production of automotive parts, supplied to the Original Equipment Manufacturers (OEM). Those core tools and another quality management tools and procedures are required to be applied by the automotive customers, according with the OEM’s requirements. The requirements in discussion are condensed within the PPAP (Production Part Approval Process) documentation. The study presents a way for starting the design and implementation of such a procedure for a tier 1 automotive supplier, according with the appropriate various Customer Specific Requirements (CSR). The study is useful especially for those ones that supply simultaneous for several global automotive OEM (BMW, Chrysler, Fiat Group Automobili, Ford Motor, General Motors, PSA Peugeot Citroen, Renault).
Quality Assurance as Major Process of Quality Management in Projects
Authors: Cîrţînă Liviu Marius , Cîrţînă Daniela , Davaris Angelo
Published: November 2015

Quality management in projects includes the processes necessary for providing the fact that the project satisfies the necessities it had been accomplished for. The quality planning function must remain present throughout the project life cycle. The quality assurance in the projects can be defined as part of quality management in projects that provide confidence that the requirements relating to the quality of the activities carried out in the project will be met. We propose a model in the work for the implementation of the quality assurance process at every stage of a project, from project idea to project results. The proposed model, called PDP/PIP (project definition process/ project implementation process) is described as an application for a project machinery industry standard tools. The outcome of the project quality assurance is a quality improvement plan. This represents a document which is specified actions designed to raise the efficiency of quality management processes in projects and quality of results of the project.
Comparison of the Assembly Line and Cell Assembly - A Case Study in Mechanical Engineering Company
Authors: Grobelny Paweł , Furmanski Lukasz , Krolczyk Jolanta B. , Legutko Stanisław
Published: November 2015

The paper compares the assembly process of milling machine using two systems: cell system and production line which was introduced after the changes in the machine assembly system of the company. Assembly in both systems takes place in the SKD (semi-knocked-down) system, which consists of assembly finished, large parts of the machine (higher completeness units) imported into the country of installation. The illustrated example presents advantages and disadvantages of assembly of milling machines in two systems: cell assembly and on the assembly line. In this example, the employees in each cells conducted assembly of machines divided into stages, which was dependent on the supply of items in the designated field by warehouse workers. Warehouse department receives a signal at what stage the assembly process is and whether the delivery of certain items is necessary. The assembly system was reorganized and replaced by the assembly line. This assembly, as previously cell assembly, is carried out in SKD system, which is a partially exploded into components. Previously assembly method took place in three stages. After the change to the assembly line this process takes 14 steps.
Group Processing of Screws in Tool Modules during Transportation
Authors: Bulenkov Yevhen , Mikhailov Alexander
Published: November 2015

This work is devoted to the development of design methods for flexible rotor lines that will combine several large-scale productions of products of different sizes in the mass diversified flow of goods by processing several sizes of goods in each group tool module. Performed work provides an opportunity to increase productivity of flexible rotor lines in 3-4 times by increasing the number of goods in 2-8 times by processing several sizes of products in each group tool module. The developed design methods for flexible rotary machines and group tool modules allows you to create high-performance systems based on combining a group-volume production of products of several sizes in the mass diversified flow of goods. Organizational and technological bases of flexible rotary machines creation are first developed in this paper. Every tool module handles multiple sizes products in these new machines. New links have been established between the structural elements of flexible rotary line with the group tool module and a combination of flow characteristics. That allows us to determine the structure of the flow of goods by combining several large-scale productions of products of several sizes in the mass diversified flow of goods.
The Impact of Cooling System on Surface Quality in Milling
Authors: Chirita Bogdan Alexandru , Tampu Nicolae Catalin
Published: November 2015

In the last years there has been an increased demand to lower the impact of industrial activities on environment quality. Cutting fluids, among other products, are an important pollutant but they have often been associated with the need for a higher productivity of machining processes. Cutting fluids are a mean of reducing temperature in the cutting area, friction and tool wear but they also represent 7% to 17% of the production costs. Other problems raised by cutting fluids are: microorganism infestation, which can cause pulmonary and dermatological diseases and poor lubrication or corrosion caused by some of the chemicals. Dry cutting is regarded as the cleanest cooling method, but it has a reduced heat dissipation efficiency and practically there is no lubrication. Other relatively new green solutions concern the use of minimum quantity lubrication (MQL) and cryogenic machining.
The Optimal Allocation of Unloading/Loading Ramps in Distribution Centers
Authors: Olteanu Sergiu , Rusca Florin Valentin , Rosca Mircea Augustin , Rosca Eugen
Published: November 2015

Warehousing enables the consolidation of shipments to clients by assembling full truck loads from goods stored in warehouse or distribution center. Storage can be efficiently replenished by ordering full truck loads from suppliers. In order to reduce freight storage and handling costs from distribution centers, cross-docking technique represents a logistic solution which is more and more used. Thus, the optimization of simultaneous unloading/loading operations constitutes an important issue for the distribution center owner/administrator. This paper presents a model based on genetic algorithms optimization techniques for solving the problem of unloading/loading ramps allocation. The efficiency of a cross-docking center is conditioned practically by finding an allocation and an optimal arrangement of ramps. This implies the allocation of destinations to unloading/loading ramps of distribution centers to minimize the total distance performed by the the cargo handling equipment. The case study presents a cross-docking platform with single handling equipment which is assigned to 10 unloading/loading ramps. By applying the solution of the ramp allocation generated through simulation, the total distance performed by the handling equipment is reduced which means lower handling cost for the distribution center owner/administrator.