bluuebunny/crossref_metadata_2025 huggingface dataset:
Five-year outcome of proximal femoral endoprosthetic arthroplasty for non-tumour indications
Authors: Grammatopoulos G. , Alvand A. , Martin H. , Whitwell D. , Taylor A. , Gibbons C. L. M. H.
Published: November 2016

Objectives

A possible solution for the management of proximal femoral bone loss is a modular femoral endoprosthesis (EPR). Although the outcome of EPRs in tumour surgery has been well described, the outcome of their use in revision hip surgery has received less attention. The aim of this study was to describe the outcome of using EPR for non-neoplastic indications.

Methods

A retrospective review of 79 patients who underwent 80 EPRs for non-neoplastic indications was performed, including the rates of complication and survival and the mean Oxford Hip Scores (OHS), at a mean of five years post-operatively. The mean age at the time of surgery was 69 years (28 to 93) and the mean number of previous operations on the hip was 2.4 (0 to 17). The most common indications for EPR implantation were periprosthetic joint infection (PJI) (n = 40), periprosthetic fracture (n = 12) and failed osteosynthesis of a proximal femoral fracture or complex trauma (n = 11).

Results

Salvage was achieved in all patients. A total of 25 patients (25 EPRs, 31.6%) had a complication, the most common being infection (n = 9) and dislocation (n = 3). Further surgery was required for 18 EPRs (22%), nine of which were revision procedures. The five year survival of the EPR was 87% (95%CI: 76% to 98%). The mean OHS was 28 (4 to 48). Inferior survival and outcomes were seen in EPRs which were performed for the treatment of infection. However, the eradication of infection was achieved in 33 of the 40 (82.5%) which were undertaken for this indication.

Conclusion

We recommend the continued use of proximal femoral EPRs for non-neoplastic indications, including PJI. Cite this article: Bone Joint J 2016;98-B:1463–70.
A randomised feasibility study comparing total hip arthroplasty with and without dual mobility acetabular component in the treatment of displaced intracapsular fractures of the proximal femur
Authors: Griffin X. L. , Parsons N. , Achten J. , Costa M. L.
Published: November 2016

Aims

The optimal treatment for independent patients with a displaced intracapsular fracture of the hip remains controversial. The recognised alternatives are hemiarthroplasty and total hip arthroplasty. At present there is no established standard of care, with both types of arthroplasty being used in many centres.

Patients and Methods

We conducted a feasibility study comparing the clinical effectiveness of a dual mobility acetabular component compared with standard polyethylene component in total hip arthroplasty for independent patients with a displaced intracapsular fracture of the hip, for a 12-month period beginning in June 2013. The primary outcome was the risk of dislocation one year post-operatively. Secondary outcome measures were EuroQol 5 Dimensions, ICEpop CAPability measure for Older people, Oxford hip score, mortality and re-operation.

Results

Only 20 patients were recruited during this time. The baseline demographics were similar in the two groups and no patient suffered a dislocation. Differences in secondary outcomes were not analysed due to the small sample.

Conclusion

This feasibility study suggests that any trial investigating the effectiveness of total hip arthroplasty for fracture of the hip might not be deliverable within the constraints of current systems of care in the United Kingdom. Cite this article: Bone Joint J 2016;98-B:1431–5.
Not just yet – the ‘R’ word
Authors: Mortensen Neil
Published: November 2016

We need to talk about leaving the profession. Just how old is too old?
Influencing policy
Authors: Marx Clare
Published: November 2016

The RCS reports back from the party conference season.
Covert treatment
Authors: Wheeler Robert
Published: November 2016

Each month we take a close look at a recent legal case with implications for the surgical profession.
Mr Slop refutes the pessimism of age
Authors: Slop
Published: November 2016

An encounter with an even grumpier old man renews our curmudgeon’s enthusiasm.
La construcción de una agenda regional para la Didáctica Específica del inglés: ¿Que nos informan las primeras prácticas de enseñanza de los estudiantes residentes?
Authors: Bonadeo Flavia S.
Published: November 2016

Si bien el inglés como lengua extranjeraes un espacio curricular en la educación secundariaargentina desde los años sesenta (Barboni, 2011),y más recientemente la Ley de Educación Nacional(2006) se propone entre sus objetivos que todos losjóvenes en nuestro país puedan comprender y expre-sarse en una lengua extranjera, escasas son lasindagaciones en el contexto nacional y regional queabordan la enseñanza de esta lengua en situación deescolarización (Baraldi, 2006; Klett, 2005 y 2009)y que podrían informar la agenda de la didáctica deesta disciplina. El presente trabajo se propone socia-lizar las primeras aproximaciones teóricas y empíricasen el marco de un proyecto de tesis cuya mirada estápuesta, precisamente, en la definición de una agendalocalmente relevante para la Didáctica Específica en laformación docente inicial de los profesores de inglés.Nos proponemos, por un lado, revisar los desarro-llos teóricos en el campo de la enseñanza del inglésy además adelantar algunas posibles líneas de inda-gación que aparecen como emergentes a partir delanálisis provisional de las narrativas de experiencia delos estudiantes residentes en las escuelas secundarias.
Enseñar con tecnologías. La maqueta como herramienta con valor didáctico–disciplinar y los modos de aproximación al conocimiento en la enseñanza del proyecto arquitectónico
Authors: Cubalo Marisa
Published: November 2016

Este artículo intenta exponer algunasreflexiones sobre los aportes del saber didáctico alas modalidades —tradicionales e innovadoras—que conviven en el taller de proyecto arquitectónico,vinculando el rol de los materiales de enseñanza, entérminos de tecnología, y la práctica educativa.En ese sentido, se avanzará, en primer lugar, sobrealgunas nociones epistemológicas de la disciplina, laenseñanza del proyecto arquitectónico, como modo deproducir y construir conocimiento y las herramientaspara la propuesta didáctica. En particular, se procurareconsiderar la función cognoscitiva de la maqueta,haciendo hincapié en la doble experticia didáctico–disciplinar y las transformaciones que se han introdu-cido en este escenario educativo con la incorporaciónde las TIC.
La música… entre el jardín y el hogar
Authors: Orlando María Laura
Published: November 2016

El arte es un derecho de todos, inclusodesde edades muy tempranas. Por ello, como docentesde niños y niñas pequeños, nos encontramos compro-metidos en este proceso, que requiere nutrirnos de«arte» en todas sus manifestaciones, de modo de poderbrindar a nuestros alumnos/as experiencias ricas paraser vividas en torno al hecho artístico. El trabajo queaquí se presenta es una propuesta áulica destinada auna sala del primer ciclo del Nivel Inicial, específica-mente sala de un año, donde se ofrecen experienciasen torno al lenguaje musical. A través de ella se buscaacercar a los niños y niñas al disfrute de la escuchamusical, a la exploración sonora de diferentes objetos,del movimiento como respuesta a estímulos sonoros,así como abrir las puertas del arte a las familias, hacién-dolas partícipes de las propuestas de la sala.
Una experiencia de educación plástico visual en la sala de un año
Authors: Martín Stella Maris
Published: November 2016

El siguiente artículo presenta una expe-riencia áulica cuyo eje central es el lenguaje plás-tico visual. A través del abordaje del mismo, y de suinclusión en la sala de un año, se intenta resignificaralgunas concepciones y prácticas tradicionales fuerte-mente arraigadas en el Nivel Inicial.Con ello se pretende superar la inadecuada imple-mentación de las llamadas técnicas grafoplásticas,haciendo especial hincapié en las posibilidades de losniños sin subestimarlos tomando en cuenta sus nece-sidades, intereses y el contexto en el que se encuen-tran insertos.De esta forma, a través de la observación de repro-ducciones de las obras del artista Juan Arancio y dela exploración gráfica con diferentes herramientas, sepropone un trabajo integrado, secuenciado, con unafinalidad propia que incluye los dominios descritospor Elliot Eisner. Se intenta trabajar con este tipo delenguaje que, como cualquier otro, necesita ser ense-ñado incluso desde edades muy tempranas, y resultamuy beneficioso en muchos aspectos para los niños.
Notes from the Editors, November 2016
Authors: The Editors -
Published: November 2016

buy this issueU.S. presidential elections, if nothing else, throw considerable light on the ideology and imperatives of the system. This is particularly the case with respect to imperialism, where one sees signs of a declining and increasingly desperate U.S. empire. Hillary Clinton has been calling for a no-fly zone in Syria (which would include Russian planes!), thereby threatening a confrontation with Russia on a level not seen since the Cuban Missile Crisis.… Trump, for his part, while appearing to suggest a kind of détente with Russia, is ready to intervene directly and massively in Iraq against the Islamic State (ISIS, ISIL, Daesh), including the use of ground troops. He supports the extension of torture and the slaughter of whole families of suspected terrorists. He claims that he would raise Israel from being a second-level power…. In short, the presidential nominees for the two major political parties are each posturing over who is the most aggressive and bellicose upholder of U.S. militarism and imperialism—and in ways that threaten further escalation of war in the Middle East and in opposition to Russia.Click here to purchase a PDF version of this article at the Monthly Review website.
Memories of a U.S. Political Prisoner
Authors: Gilbert David
Published: November 2016

"We will fight from one generation to the next." In the 1960s and 1970s we anti-imperialists in the U.S. were inspired not only by that slogan from Vietnam but even more by how they lived it with their 2000-year history of defeating a series of mighty invaders. At the same time we felt that we just might be on the cusp of world revolution in our lifetimes. Vietnam's ability to stand up to and eventually defeat the most lethal military machine in world history was the spearhead. Dozens of revolutionary national liberation struggles were sweeping what was then called the "Third World," today referred to as the "global South." There was a strategy to win, as articulated by Che Guevara: to overextend and defeat the powerful imperial beast by creating "two, three, many Vietnams." A range of radical and even revolutionary movements erupted within the U.S. and also in Europe and Japan.… Tragically, the revolutionary potential that felt so palpable then has not been realized.… Today, fighting from one generation to the next takes on new relevance and intense urgency.Click here to purchase a PDF version of this article at the Monthly Review website.
Mitología, cultura popular y juegos de rol
Authors: Pérez Miranda Iván , Acosta Del Río Severiano
Published: November 2016

Desde sus orígenes, los juegos de rol han estado vinculados con la literatura fantástica, que a su vez reelabora el material mítico. Juegos de rol y literatura fantástica establecerán un diálogo ejerciéndose una influencia recíproca y entrando en contacto con otros medios como el cine, los cómics o los videojuegos. En este diálogo, la mitología estará bien presente. Este artículo pretende indagar en las diversas relaciones que se establecen entre la mitología, la cultura popular y los juegos de rol, desde sus influencias y fuentes de inspiración, hasta las propias estructuras de las historias narradas en los juegos de rol, donde los jugadores toman el papel de héroes que interpretan en sus viajes iniciáticos, un viaje con un gran potencial educativo en el que tanto los jugadores como los personajes madurarán a través de sus propias historias interminables.
Mito e Historia: la rivalidad de dos hermanos
Authors: López Saco Julio
Published: November 2016

El pensamiento occidental se ha orientado hacia destacar la pasión por el conocimiento y no por hacer relevante el conocimiento de las pasiones, obviando o despreciando esos saberes tradicionales en los que los seres humanos estamos sumergidos desde nuestro nacimiento como género y como individuos. Como la historia no ha de estudiar únicamente lo que ocurrió, sino cómo se sintió o pensó quién participó en lo que acontecía, pues los seres humanos, agentes de la historia, actúan conducidos por pasiones, el mito es un producto de la misma. El discurso narrativo de la historia, por otra parte, no es un medio neutral para representar acontecimientos y procesos históricos, sino que es materia de una concepción mítica de la realidad. Se comprende la atracción del discurso histórico si se reconoce en qué medida hace deseable lo que es real. El vocablo historia proclama ambigüedad, uniendo aspectos objetivos y subjetivos. Denota las res gestae, pero también la historia rerum gestarum, incluyendo lo que ha sucedido y también la narración de lo que ha ocurrido. El concepto de historia reproduce, por consiguiente, la ambigüedad que existe en la falta de distinción apropiada entre el objeto de estudio, que es el pasado humano, y la trama del discurso que sobre tal objeto se despliega. La representación histórica emplea la imaginación y permite que el potencial lector deje que su imaginación contribuya a focalizar dicho pasado. El mito influye, además, en las realidades sociales, ejerciendo un papel legitimador, o no, como ocurre con la realidad política de una ciudad o la prestigiosa de una familia nobiliaria. Es por eso que hoy ya no se debe aludir a una separación evidente entre mito e historia, pues toda concepción histórica posee elementos míticos. En definitiva, sin acciones que bordeen el mito, sin algunos resabios del mismo, no se hace historia, sin que ello la descalifique, sino que la enriquece.
La industria de la muñeca en España a través de sus invenciones, 1883-1914
Authors: Capellà Simó Pere
Published: November 2016

Durante las últimas décadas, la historia de la muñeca se ha convertido en un tema de interés reciente en el mundo académico, tanto desde la historia de la educación como desde la historia industrial y del diseño. El presente artículo es una primera aproximación histórica a la industria de la muñeca a través de las invenciones patentadas en España antes de la Primera Guerra Mundial. El vaciado exhaustivo de los expedientes conservados en el Archivo Histórico de la Oficina Española de Patentes y Marcas se ha completado con la identificación de los inventores en las fuentes propias de la historia del juguete y con la documentación de buena parte de los modelos patentados tras la consulta de 20 colecciones especializadas.
Institucionalización del fútbol en el ejército español (1919-1920)
Authors: Torrebadella-Flix Xavier , Olivera Betrán Javier
Published: November 2016

El objeto de estudio se centra en analizar cómo, cuándo y por qué se incorporó e institucionalizó el fútbol en el ejército español y cuál fue su incidencia en su posterior desarrollo y masificación. A partir de los textos originales y un análisis crítico del discurso se ofrece una interpretación original de este proceso desde la histórica social, cuando el fútbol se convierte en un sutil instrumento al servicio de los poderes subyacentes del Estado. En el contexto de una coyuntura bélica nacional (Guerra de Marruecos, 1909-1927) e internacional (Primera Guerra Mundial, 1914-1918), el movimiento regeneracionista elaboró un discurso de fomento del fútbol por sus notables valores y condiciones en el proceso de preparación físico-militar de la tropa española, que generó un intenso debate que discutía sobre su introducción en el estamento militar español. Los ecos de la práctica y difusión del fútbol en la Primera Guerra Mundial y el triunfo aliado con la imposición de su modelo (también el deportivo), la implantación creciente del fútbol en el territorio español con un alto crecimiento de practicantes y la creación de nuevos clubes, el éxito del fútbol español en la Olimpiada de Amberes en 1920 que trajo el nacimiento de la ‘furia española’, y la estrecha analogía en la terminología y el léxico deportivo-militar del fútbol contribuyeron a su institucionalización en el ejército español entre 1919 y 1920. Tras estas circunstancias se arraigan las raíces de lo que se puede llamar el patrioterismo futbolístico español, una construcción simbólica que ha llegado hasta nuestros días como dispositivo identitario y propagandístico promovido por los distintos poderes del Estado para ejercer el dominio social de las masas y promover la cohesión nacional.
Violence faced by nursing students in clinical practicals and its effects: A questionnaire survey
Authors: Dikmen Yurdanur , Yılmaz Dilek , Yıldırım Usta Yasemin
Published: November 2016

Nursing students may be exposed to all the kinds of violence in clinical practice areas. Purpose: This study was conducted in order to determine the violence faced by nursing students in clinical practice areas, its effect on the gender factor and the feelings and behavior of students after the violence.Methods: The study took place at a Foundation University in Bolu, Turkey over the period 2013-2014. The students' levels of voilence were assessed second, third and fourth years of the program. The research population consisted of the 256 students in the nursing department at the school. The sample group of the study consisted of a total of 220 students. Data were collected with a Student Information Form prepared by the researchers.Results: 69.1% of students were exposed to violence during their practicals, and this mostly (70.5%) took the form of verbal violence. 83.4% of female students reported that they were exposed to physical violence, 53.3% of them reported verbal violence and 60% reported that they were exposed to sexual violence, while 70.6% of the male students reported that they were exposed to gender discrimination. Among the forms of violence experienced, it was found that there was a statistically significant relationship (p<0.05) to gender.Conclusions: These results showed that students were frequently exposed to violence in clinical areas, the form of violence was mostly verbal violence, the majority of male students were exposed to gender discrimination.
Pembuatan Antarmuka Sistem Pemantau Ruangan Berbasis Web
Authors: Handrio Ruli , Isnanto R. Rizal , Widianto Eko Didik
Published: November 2016

As the advancement of technology, there are a lot of things that could be efficiently done by technology. technology of surveillance system is necessary and highly demanded by many people at the current momment. The interface of room surveillance system using PHP programming language and MySQL as a database management system which can generate video and other information as an output in web based browser.The results of this research is an interfaces of surveillance systems that can be used as room monitoring. The result of the Black box testing from this interface of surveillance system indicates that all of the system function has been successfully operated. Hopefully this research can be used to help for further research. Keywords – Interface; PHP; MySQL; Web; VideoAbstrak – Seiring dengan perkembangan teknologi, banyak hal yang dapat diselesaikan secara mudah oleh teknologi tersebut. Teknologi sistem pemantauan juga sangat diperlukan dan diminati oleh banyak orang saat ini. Pembuatan antarmuka sistem pemantau ruang ini menggunakan bahasa pemrograman PHP dan MySQL sebagai manajemen basisdata yang dapat menghasilkan video dan juga informasi sebagai keluaranya melalui web browser. Hasil dari pengujian Black box dari antarmuka sistem pemantau ruang ini menunjukan bahwa semua fungsi dari sistem sudah berhasil berjalan. Diharapkan penelitian ini dapat digunakan untuk membantu penelitian – penelitian kedepanya.
Not for the timid
Authors: Lang Willis , Ramachandra Karthik , DeWitt David J. , Xu Shize , Guo Qun , Kalhan Ajay , Carlin Peter
Published: November 2016

To lower hosting costs and service prices, database-as-a-service (DBaaS) providers strive to maximize cluster utilization without negatively affecting their users' service experience. Some of the most effective approaches for increasing service efficiency result in the over-booking of the cluster with user databases. For instance, one approach is to reclaim cluster capacity from a database when it is idle, temporarily re-using the capacity for some other purpose, and over-booking the cluster's resources. Such approaches are largely driven by policies that determine when it is prudent to temporarily reclaim capacity from an idle database. In this paper, we examine policies that inherently tune the system's idle sensitivity. Increased sensitivity to idleness leads to aggressive over-booking while the converse leads to conservative reclamation and lower utilization levels. Aggressive over-booking also incurs a "reserve" capacity cost (for when we suddenly "owe" capacity to previously idle databases.) We answer these key questions in this paper: (1) how to find a "good" resource reclamation policy for a given DBaaS cluster of users; and (2) how to forecast the needed near-term reserve capacity. To help us answer these questions, we used production user activity traces from Azure SQL DB and built models of an over-booking mechanism. We show that choosing the right policy can substantially boost the efficiency of the service, facilitating lower service prices via lower amortized infrastructure costs.
Kodiak
Authors: Liu Shaosu , Song Bin , Gangam Sriharsha , Lo Lawrence , Elmeleegy Khaled
Published: November 2016

Turn's online advertising campaigns produce petabytes of data. This data is composed of trillions of events, e.g. impressions, clicks, etc., spanning multiple years. In addition to a timestamp, each event includes hundreds of fields describing the user's attributes, campaign's attributes, attributes of where the ad was served, etc.

Advertisers need advanced analytics to monitor their running campaigns' performance, as well as to optimize future campaigns. This involves slicing and dicing the data over tens of dimensions over arbitrary time ranges. Many of these queries need to power the web portal to provide reports and dashboards. For an interactive response time, they have to have tens of milliseconds latency. At Turn's scale of operations, no existing system was able to deliver this performance in a cost effective manner.

Kodiak, a distributed analytical data platform for web-scale high-dimensional data, was built to serve this need. It relies on pre-computations to materialize thousands of views to serve these advanced queries. These views are partitioned and replicated across Kodiak's storage nodes for scalability and reliability. They are system maintained as new events arrive. At query time, the system auto-selects the most suitable view to serve each query.

Kodiak has been used in production for over a year. It hosts 2490 views for over three petabytes of raw data serving over 200K queries daily. It has median and 99% query latencies of 8 ms and 252 ms respectively. Our experiments show that its query latency is 3 orders of magnitude faster than leading big data platforms on head-to-head comparisons using Turn's query workload. Moreover, Kodiak uses 4 orders of magnitude less resources to run the same workload.
GraphJet
Authors: Sharma Aneesh , Jiang Jerry , Bommannavar Praveen , Larson Brian , Lin Jimmy
Published: November 2016

This paper presents GraphJet, a new graph-based system for generating content recommendations at Twitter. As motivation, we trace the evolution of our formulation and approach to the graph recommendation problem, embodied in successive generations of systems. Two trends can be identified: supplementing batch with real-time processing and a broadening of the scope of recommendations from users to content. Both of these trends come together in Graph-Jet, an in-memory graph processing engine that maintains a real-time bipartite interaction graph between users and tweets. The storage engine implements a simple API, but one that is sufficiently expressive to support a range of recommendation algorithms based on random walks that we have refined over the years. Similar to Cassovary, a previous graph recommendation engine developed at Twitter, GraphJet assumes that the entire graph can be held in memory on a single server. The system organizes the interaction graph into temporally-partitioned index segments that hold adjacency lists. GraphJet is able to support rapid ingestion of edges while concurrently serving lookup queries through a combination of compact edge encoding and a dynamic memory allocation scheme that exploits power-law characteristics of the graph. Each GraphJet server ingests up to one million graph edges per second, and in steady state, computes up to 500 recommendations per second, which translates into several million edge read operations per second.
Database system support of simulation data
Authors: Lustosa Hermano , Porto Fabio , Valduriez Patrick , Blanco Pablo
Published: November 2016

Supported by increasingly efficient HPC infra-structure, numerical simulations are rapidly expanding to fields such as oil and gas, medicine and meteorology. As simulations become more precise and cover longer periods of time, they may produce files with terabytes of data that need to be efficiently analyzed. In this paper, we investigate techniques for managing such data using an array DBMS. We take advantage of multidimensional arrays that nicely models the dimensions and variables used in numerical simulations. However, a naive approach to map simulation data files may lead to sparse arrays, impacting query response time, in particular, when the simulation uses irregular meshes to model its physical domain. We propose efficient techniques to map coordinate values in numerical simulations to evenly distributed cells in array chunks with the use of equi-depth histograms and space-filling curves. We implemented our techniques in SciDB and, through experiments over real-world data, compared them with two other approaches: row-store and column-store DBMS. The results indicate that multidimensional arrays and column-stores are much faster than a traditional row-store system for queries over a larger amount of simulation data. They also help identifying the scenarios where array DBMSs are most efficient, and those where they are outperformed by column-stores.
TrafficDB
Authors: Fernandes Ricardo , Zaczkowski Piotr , Göttler Bernd , Ettinoffe Conor , Moussa Anis
Published: November 2016

HERE's traffic-aware services enable route planning and traffic visualisation on web, mobile and connected car applications. These services process thousands of requests per second and require efficient ways to access the information needed to provide a timely response to end-users. The characteristics of road traffic information and these traffic-aware services require storage solutions with specific performance features. A route planning application utilising traffic congestion information to calculate the optimal route from an origin to a destination might hit a database with millions of queries per second. However, existing storage solutions are not prepared to handle such volumes of concurrent read operations, as well as to provide the desired vertical scalability. This paper presents TrafficDB, a shared-memory data store, designed to provide high rates of read operations, enabling applications to directly access the data from memory. Our evaluation demonstrates that TrafficDB handles millions of read operations and provides near-linear scalability on multi-core machines, where additional processes can be spawned to increase the systems' throughput without a noticeable impact on the latency of querying the data store. The paper concludes with a description of how TrafficDB improved the performance of our traffic-aware services running in production.
Comdb2 bloomberg's highly available relational database system
Authors: Scotti Alex , Hannum Mark , Ponomarenko Michael , Hogea Dorin , Sikarwar Akshat , Khullar Mohit , Zaimi Adi , Leddy James , Zhang Rivers , Angius Fabio , Deng Lingzhi
Published: November 2016

Comdb2 is a distributed database system designed for geographical replication and high availability. In contrast with the latest trends in this field, Comdb2 offers full transactional support, a standard relational model, and the expressivity of SQL. Moreover, the system allows for rich stored procedures using a dialect of Lua. Comdb2 implements a serializable system in which reads from any node always return current values. Comdb2 provides transparent High Availability through built-in service discovery and sophisticated retry logic embedded in the standard API.

In addition to the relational data model, Comdb2 implements queues for publisher-to-subscriber message delivery. Queues can be combined with table triggers for time-consistent log distribution, providing functionality commonly needed in modern OLTP.

In this paper we give an overview of our last twelve years of work. We focus on the design choices that have made Comdb2 the primary database solution within our company, Bloomberg LP (BLP).
GARUDA
Authors: Bhadange Satyajit , Arora Akhil , Bhattacharya Arnab
Published: November 2016

Unraveling "interesting" subgraphs corresponding to disease/crime hotspots or characterizing habitation shift patterns is an important graph mining task. With the availability and growth of large-scale real-world graphs, mining for such subgraphs has become the need of the hour for graph miners as well as non-technical end-users. In this demo, we present GARUDA, a system capable of mining large-scale graphs for statistically significant subgraphs in a scalable manner, and provide: (1) a detailed description of the various features and user-friendly GUI of GARUDA; (2) a brief description of the system architecture; and (3) a demonstration scenario for the audience. The demonstration showcases one real graph mining task as well as its ability to scale to large real graphs, portraying speed-ups of upto 8--10 times over the state-of-the-art MSCS algorithm.
Graph databases in the browser
Authors: Maccioni Antonio , Collina Matteo
Published: November 2016

The pervasiveness of graphs on the Web is growing; however, the difficulty of managing complex graph structures curbs the development of web-oriented applications that embed network data. The open source project, L
evel
G
raph
, aims to overcome the obstacles that web developers face with graph data management. L
evel
G
raph
is an easy-to-use graph database layer for web applications.

To demonstrate various capabilities of the system, we developed a web-based application that utilizes a graph database of a tourist network in New Delhi. The application allows users to move around the city while L
evel
G
raph
executes graph queries on the underlying database. In this demonstration, we show how L
evel
G
raph
's features facilitate development and maintainance of web applications that embed graph data.
AutoG
Authors: Yi Peipei , Choi Byron , Bhowmick Sourav S , Xu Jianliang
Published: November 2016

Composing queries is evidently a tedious task. This is particularly true of graph queries as they are typically complex and prone to errors, compounded by the fact that graph schemas can be missing or too loose to be helpful for query formulation. Despite the great success of query formulation aids, in particular,
automatic query completion
, graph query autocompletion has received much less research attention. In this demonstration, we present a novel interactive visual subgraph query autocompletion framework called A
uto
G which alleviates the potentially painstaking task of graph query formulation. Specifically, given a large collection of small or medium-sized graphs and a visual query fragment
q
formulated by a user, A
uto
G returns top-
k
query suggestions
Q
′ as output at interactive time. Users may choose a query from
Q
′ and iteratively apply A
uto
G to compose their queries. We demonstrate various features of A
uto
G and its superior ability to generate high quality suggestions to aid visual subgraph query formulation.
ExRank
Authors: Bespinyowong Ramon , Chen Wei , Jagadish H. V. , Ma Yuxin
Published: November 2016

Even with simple everyday tasks like online shopping or choosing a restaurant, users are easily overwhelmed with the large number of choices available today, each with a large number of inter-related attributes. We present ExRank, an interactive interface for exploring data that helps users understand the relationship between attribute values and find interesting items in the dataset. Based on a kNN graph and a PageRank algorithm, ExRank suggests which attributes the user should look at, and how expressed choices in particular attributes affect the distribution of values in other attributes for candidate objects. It solves the problem of empty result by showing similar items and when there are too many results, it ranks the data for the user. This demo consists of 1) the description of the software architecture and the user interface 2) the logic and reason behind our solution and 3) a list of demonstration scenarios for showing to the audience.
SPARQLByE
Authors: Diaz Gonzalo , Arenas Marcelo , Benedikt Michael
Published: November 2016

Semantic Web technologies such as RDF and its query language, SPARQL, offer the possibility of opening up the use of public datasets to a great variety of ordinary users. But a key obstacle to the use of open data is the unfamiliarity of users with the structure of data or with SPARQL. To deal with these issues, we introduce a system for querying RDF data by example. At its core is a technique for reverse-engineering SPARQL queries by example. We demonstrate how reverse engineering along with other techniques, such as query relaxation, enables our system, SPARQLByE, to guide users who are unfamiliar with both the dataset and with SPARQL to the desired query and result set.
Graph-based exploration of non-graph datasets
Authors: Khurana Udayan , Parthasarathy Srinivasan , Turaga Deepak
Published: November 2016

Graphs or networks provide a powerful abstraction to view and analyze relationships among different entities present in a dataset. However, much of the data of interest to analysts and data scientists resides in non-graph forms such as relational databases, JSON, XML, CSV and text. The effort and skill required in identifying and extracting the relevant graph representation from data is often the prohibitive and limits a wider adoption of graph-based analysis of non-graph data. In this paper, we demonstrate our system calledGraphViewer, for accelerated graph-based exploration and analysis. It automatically discovers relevant graphs implicit within a given non-graph dataset using a set of novel rule-based and data-driven techniques, and optimizes their extraction and storage. It computes several node and graph level metrics and detects anomalous entities in data. Finally, it summarizes the results to support interpretation by a human analyst. While the system automates the computationally intensive aspects of the process, it is engineered to leverage human domain expertise and instincts to fine tune the data exploration process.
Machine learning in the real world
Authors: Chaoji Vineet , Rastogi Rajeev , Roy Gourav
Published: November 2016

Machine Learning (ML) has become a mature technology that is being applied to a wide range of business problems such as web search, online advertising, product recommendations, object recognition, and so on. As a result, it has become imperative for researchers and practitioners to have a fundamental understanding of ML concepts and practical knowledge of end-to-end modeling. This tutorial takes a hands-on approach to introducing the audience to machine learning. The first part of the tutorial gives a broad overview and discusses some of the key concepts within machine learning. The second part of the tutorial takes the audience through the end-to-end modeling pipeline for a real-world income prediction problem.
Modern main-memory database systems
Authors: Larson Per-Åke , Levandoski Justin
Published: November 2016

This tutorial provides an overview of recent developments in main-memory database systems. With growing memory sizes and memory prices dropping by a factor of 10 every 5 years, data having a "primary home" in memory is now a reality. Main-memory databases eschew many of the traditional architectural tenets of relational database systems that optimized for disk-resident data. Innovative approaches to fundamental issues such as concurrency control and query processing are required to unleash the full performance potential of main-memory databases. The tutorial is focused around design issues and architectural choices that must be made when building a high performance database system optimized for main-memory: data storage and indexing, concurrency control, durability and recovery techniques, query processing and compilation, support for high availability, and ability to support hybrid transactional and analytics workloads. This will be illustrated by example solutions drawn from four state-of-the-art systems: H-Store/VoltDB, Hekaton, HyPeR, and SAP HANA. The tutorial will also cover current and future research trends.
Data-driven disruption
Authors: Rajaraman Anand
Published: November 2016

We live in an era where software is transforming industries, the sciences, and society as a whole. This exciting phenomenon has been described by the phrase "software is eating the world." It is becoming increasingly apparent that data is the fuel powering software's conquests. Data is the new disruptor.

It's hard to believe that the first decade of the Big Data era is already behind us. Silicon Valley has been at the forefront of developing and applying data-driven approaches to create disruption at many levels: infrastructure (e.g., Hadoop and Spark), capabilities (e.g., image recognition and machine translation), and killer apps (e.g., self-driving cars and messaging bots).

In this talk, we first look back on the past decade and share learnings from the frontlines of data-driven disruption. Looking ahead, we then describe challenges and opportunities for the next decade. Since this has also been a personal journey, we will use examples drawn from personal experience to illustrate each point.
Location data management
Authors: Mokbel Mohamed , Chow Chi-Yin , Aref Walid
Published: November 2016

In early 2000, we had the vision of ubiquitous location services, where each object is aware of its location, and continuously sends its location to a designated database server. This flood of location data opened the door for a myriad of location-based services that were considered visionary at that time, yet today they are a reality and have become ubiquitous. To realize our early vision, we identified two main challenges that needed to be addressed, namely, scalability and privacy. We have addressed these challenges through two main systems, PLACE and Casper. PLACE, developed at Purdue University from 2000 to 2005, set up the environment for built-in database support of scalable and continuous location-based services. The Casper system, developed at University of Minnesota from 2005 to 2010, was built inside the PLACE server allowing it to provide its high quality scalable service, while maintaining the privacy of its users' locations. This talk will take you through a time journey of location services from 2000 until today, and beyond, highlighting the development efforts of the PLACE and Casper systems, along with their impact on current and future research initiatives in both academia and industry.
Perturbation analysis of database queries
Authors: Walenz Brett , Yang Jun
Published: November 2016

We present a system,
Perada
, for parallel
perturbation analysis
of database queries. Perturbation analysis considers the results of a query evaluated with (a typically large number of) different parameter settings, to help discover leads and evaluate claims from data. Perada simplifies the development of general, ad hoc perturbation analysis by providing a flexible API to support a variety of optimizations such as grouping, memoization, and pruning; by automatically optimizing performance through run-time observation, learning, and adaptation; and by hiding the complexity of concurrency and failures from its developers. We demonstrate Perada's efficacy and efficiency with real workloads applying perturbation analysis to computational journalism.
The Influence of Mg(II) and Ca(II) Ions on Rutin Autoxidation in Weakly Alkaline Aqueous Solutions
Authors: Živanović Slavoljub C. , Nikolić Ružica S. , Nikolić Goran M.
Published: November 2016

Rutin (quercetin-3-O-rutinoside) is one of the most abundant bioflavonoids with various biological and pharmacological activities. Considering the ubiquitous presence of Mg(II) and Ca(II) ions in biological systems we decided to investigate their influence on the autoxidation of rutin in weakly alkaline aqueous solutions. Changes in UV-Vis spectra recorded during the rutin autoxidation in aqueous solution at pH 8.4 revealed that this process was very slow in the absence of metal ions. The presence of Mg(II) and, especially Ca(II) ion, increased the transformation rate of rutin. UV-Vis spectra recorded after prolonged autoxidation indicated the formation of humic acidlike products in the presence of Mg(II) and Ca(II) ions. Four new compounds formed during the initial stage of rutin autoxidation in the presence of Mg(II) and Ca(II) ions were detected by HPLCDAD. Based on the analysis of their DAD UV-Vis spectra and comparison of their retention times with the retention time value for rutin, we concluded that the initial rutin transformation products were formed by the water addition on double bond in ring C and hydroxylation of ring B. A very small decrease of the initial rutin concentration (4%) was observed by HPLC-DAD in the absence of metal ions for the period of 90 minutes. However, rutin concentration decrease was much larger in the presence of Mg(II) and Ca(II) ions (14% and 24%, respectively). The more pronounced effect of Ca(II) ion on the rutin autoxidation may be explained by the stronger binding of Mg(II) ion to rutin and thus greater stabilizing effect on reaction intermediates caused by its higher ionic potential (charge/ionic radius ratio) in comparison to Ca(II) ion. The results of this study may contribute to the better understanding of interactions of Mg(II) and Ca(II) ions with natural phenolic antioxidants which are important for their various biological activities.
Teacher Education in English for Special Purposes
Authors: Antić Zorica
Published: November 2016

This paper establishes a basic framework for addressing the issue of teacher’s role and education in English for Special Purposes (ESP) with an overview of English for Medical Purposes (EMP).

The content of an ESP/EMP syllabus is determined by the learners’ reasons for learning English. This has led to a change in the role that teachers have in specialized English classes compared to general English. They are required to work actively with the learners and medical subject teachers in order to create a syllabus that would promote effective learning.

Teacher education encompasses adequate knowledge, teaching and professional skills, interests and attitudes towards teaching.
Ameloblastoma of the Lower Jaw: A Case Report
Authors: Trajković Miloš , Krasić Dragan , Spasić Milan , Krstić Miljan , Stojanović Miloš , Lazić Vojkan
Published: November 2016

Ameloblastoma, a semi-benign odontogenic tumor, is divided into four subtypes based on the clinical presentation, radiological manifestations and histological characteristics. Radiologically, it manifests itself in the form of uni- or multicystic intrabony expansive lesions, with destruction of the medullary zone of the existing bone, resorption and possible perforation of the buccal and lingual cortex.

The patient, a 62-year-old woman, came to the Clinic for Maxillofacial Surgery in Niš with an anamnestically present painless tumefaction in the anterior segment of the mandible present for the past three years. In the course of an intraoral examination in the region of symphysis and parasymphysis of the lower jaw on the left side, an oval-shaped tumor was spotted, 5x3 cm in size; palpation showed that it was hard, painless and motionless. Multislice computed tomography (MSCT) of the oro - and hypopharynx and neck showed an extensive tumor formation of the soft tissue density in the anterior segments of the lower jaw, with the signs of destruction of bone tissue of the buccal and lingual cortex of the lower jaw.

The frequency of recurrence depends on the histological type of ameloblastoma and the degree of radicalism of the performed surgical intervention. Ameloblastoma in most cases is definitely diagnosed in the advanced stage of the disease due to the absence of symptoms and very slow tumor progression.
Antioxidant defences of Norway spruce bark against bark beetles and its associated blue-stain fungus
Authors: Felicijan Mateja , Novak Metka , Kraševec Nada , Urbanek Krajnc Andreja
Published: November 2016

Bark beetles and their fungal associates are integral parts of forest ecosystems, the European spruce bark beetle (Ips typographus Linnaeus, 1758) and the associated pathogenic blue stain fungus Ceratocystis polonica (SIEM.) C. MOREAU, are the most devastating pests regarding Norway spruce [Picea abies (L.) H. KARST.]. Bark beetles commonly inhabit weakened and felled trees as well as vital trees. They cause physiological disorders in trees by destroying a phloem and cambium or interrupt the transpiration -ow in the xylem. Conifers have a wide range of effective defence mechanisms that are based on the inner bark anatomy and physiological state of the tree. The basic function of bark defences is to protect the nutrient-and energy-rich phloem, the vital meristematic region of the vascular cambium, and the transpiration -ow in the sapwood. The main area of defence mechanisms is secondary phloem, which is physically and chemically protected by polyphenolic parenchyma (PP) cells, sclerenchyma, calcium oxalate crystals and resin ducts. Conifer trunk pest resistance includes constitutive, inducible defences and acquired resistance. Both constitutive and inducible defences may deter beetle invasion, impede fungal growth and close entrance wounds. During a successful attack, systemic acquired resistance (SAR) becomes effective and represents a third defence strategy. It gradually develops throughout the plant and provides a systemic change within the whole tree’s metabolism, which is maintained over a longer period of time. The broad range of defence mechanisms that contribute to the activation and utilisation of SAR, includes antioxidants and antioxidant enzymes, which are generally linked to the actions of reactive oxygen species (ROS). The presented review discusses the current knowledge on the antioxidant defence strategies of spruce inner bark against the bark beetle (Ips typographus) and associated blue stain fungus (Ceratocystis polonica).