WorldWideScience

Sample records for surgery open source

  1. Open heart surgery

    Science.gov (United States)

    Heart surgery - open ... lung machine is used in most cases during open heart surgery. While the surgeon works on the ... with these procedures, the surgeon may have to open the chest to do the surgery.

  2. The Image-Guided Surgery ToolKit IGSTK: an open source C++ software toolkit

    Science.gov (United States)

    Cheng, Peng; Ibanez, Luis; Gobbi, David; Gary, Kevin; Aylward, Stephen; Jomier, Julien; Enquobahrie, Andinet; Zhang, Hui; Kim, Hee-su; Blake, M. Brian; Cleary, Kevin

    2007-03-01

    The Image-Guided Surgery Toolkit (IGSTK) is an open source C++ software library that provides the basic components needed to develop image-guided surgery applications. The focus of the toolkit is on robustness using a state machine architecture. This paper presents an overview of the project based on a recent book which can be downloaded from igstk.org. The paper includes an introduction to open source projects, a discussion of our software development process and the best practices that were developed, and an overview of requirements. The paper also presents the architecture framework and main components. This presentation is followed by a discussion of the state machine model that was incorporated and the associated rationale. The paper concludes with an example application.

  3. Towards open-source, low-cost haptics for surgery simulation.

    Science.gov (United States)

    Suwelack, Stefan; Sander, Christian; Schill, Julian; Serf, Manuel; Danz, Marcel; Asfour, Tamim; Burger, Wolfgang; Dillmann, Rüdiger; Speidel, Stefanie

    2014-01-01

    In minimally invasive surgery (MIS), virtual reality (VR) training systems have become a promising education tool. However, the adoption of these systems in research and clinical settings is still limited by the high costs of dedicated haptics hardware for MIS. In this paper, we present ongoing research towards an open-source, low-cost haptic interface for MIS simulation. We demonstrate the basic mechanical design of the device, the sensor setup as well as its software integration.

  4. Open Source

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    一场秋雨一场凉,开源社区的气温却丝毫没有降。刚在北京闭幕的“2006中国开源世界高峰论坛”足以让世界侧目。国际大师云集是最大的亮点,很多熟悉的名字:Andrew Morton(Linux内核开发大师及2.6版本监护人)、Brian Behlendorf(Apache创始人)、David Axmark(MySQL创始人)、Marc Fleury(JBoss创始人)、Larry Augustin(Source Forge创始人)等;其次是中国政府、学术界的支持,包括国家信产部陈英司长和中国工程院倪光南院士、沈昌祥院士等;当然.少不了诸多跨国公司和国内知名企业的参与。

  5. Electronic data capture for registries and clinical trials in orthopaedic surgery: open source versus commercial systems.

    Science.gov (United States)

    Shah, Jatin; Rajgor, Dimple; Pradhan, Shreyasee; McCready, Mariana; Zaveri, Amrapali; Pietrobon, Ricardo

    2010-10-01

    Collection and analysis of clinical data can help orthopaedic surgeons to practice evidence based medicine. Spreadsheets and offline relational databases are prevalent, but not flexible, secure, workflow friendly and do not support the generation of standardized and interoperable data. Additionally these data collection applications usually do not follow a structured and planned approach which may result in failure to achieve the intended goal. Our purposes are (1) to provide a brief overview of EDC systems, their types, and related pros and cons as well as to describe commonly used EDC platforms and their features; and (2) describe simple steps involved in designing a registry/clinical study in DADOS P, an open source EDC system. WHERE ARE WE NOW?: Electronic data capture systems aimed at addressing these issues are widely being adopted at an institutional/national/international level but are lacking at an individual level. A wide array of features, relative pros and cons and different business models cause confusion and indecision among orthopaedic surgeons interested in implementing EDC systems. WHERE DO WE NEED TO GO?: To answer clinical questions and actively participate in clinical studies, orthopaedic surgeons should collect data in parallel to their clinical activities. Adopting a simple, user-friendly, and robust EDC system can facilitate the data collection process. HOW DO WE GET THERE?: Conducting a balanced evaluation of available options and comparing them with intended goals and requirements can help orthopaedic surgeons to make an informed choice.

  6. Open Source and Open Standards

    NARCIS (Netherlands)

    Koper, Rob

    2006-01-01

    Publication reference: Koper, R. (2008). Open Source and Open Standards. In J. M. Spector, M. Merrill, J. van Merriënboer & M. P. Driscol (Eds.), Handbook of Research on Educational Communications and Technology (3rd ed., pp. 355-368). New York: Routledge.

  7. Open Source Business Solutions

    Directory of Open Access Journals (Sweden)

    Ion IVAN

    2008-01-01

    Full Text Available This analyses the Open source movement. Open source development process and management is seen different from the classical point of view. This focuses on characteristics and software market tendencies for the main Open source initiatives. It also points out the labor market future evolution for the software developers.

  8. Duke Surgery Patient Safety: an open-source application for anonymous reporting of adverse and near-miss surgical events

    Directory of Open Access Journals (Sweden)

    McCready Mariana

    2007-05-01

    Full Text Available Abstract Background Studies have shown that 4% of hospitalized patients suffer from an adverse event caused by the medical treatment administered. Some institutions have created systems to encourage medical workers to report these adverse events. However, these systems often prove to be inadequate and/or ineffective for reviewing the data collected and improving the outcomes in patient safety. Objective To describe the Web-application Duke Surgery Patient Safety, designed for the anonymous reporting of adverse and near-miss events as well as scheduled reporting to surgeons and hospital administration. Software architecture DSPS was developed primarily using Java language running on a Tomcat server and with MySQL database as its backend. Results Formal and field usability tests were used to aid in development of DSPS. Extensive experience with DSPS at our institution indicate that DSPS is easy to learn and use, has good speed, provides needed functionality, and is well received by both adverse-event reporters and administrators. Discussion This is the first description of an open-source application for reporting patient safety, which allows the distribution of the application to other institutions in addition for its ability to adapt to the needs of different departments. DSPS provides a mechanism for anonymous reporting of adverse events and helps to administer Patient Safety initiatives. Conclusion The modifiable framework of DSPS allows adherence to evolving national data standards. The open-source design of DSPS permits surgical departments with existing reporting mechanisms to integrate them with DSPS. The DSPS application is distributed under the GNU General Public License.

  9. Mitral valve surgery - open

    Science.gov (United States)

    ... Saunders; 2012:chap 61. Otto CM, Bonow RO. Valvular heart disease. In: Mann DL, Zipes DP, Libby P, Bonow ... Editorial team. Related MedlinePlus Health Topics Heart Surgery Heart Valve Diseases Mitral Valve Prolapse Browse the Encyclopedia A.D. ...

  10. Aortic valve surgery - open

    Science.gov (United States)

    ... Saunders; 2012:chap 61. Otton CM, Bowow RO. Valvular heart disease. In: Mann DL, Zipes DP, Libby P, Bonow ... Editorial team. Related MedlinePlus Health Topics Heart Surgery Heart Valve Diseases Browse the Encyclopedia A.D.A.M., Inc. ...

  11. Infections in open heart surgery.

    Science.gov (United States)

    Baddour, L M; Kluge, R M

    1989-01-01

    More than 250,000 open heart surgical procedures are performed annually in the United States. The majority of these procedures are coronary artery bypass grafts (CABG) and valve replacements. In this forum our authors discuss the kinds of infections that occur in patients following open heart surgery, as well as the documented risk factors and microbiology of these infections. We also asked each author to outline the criteria used to diagnose post open heart surgery infections, and to address associated consequences and complications. Finally, we were interested in each author's definition of the infection control practitioner's role in the prevention of this particular subset of nosocomial infections.

  12. Duke Surgery Research Central: an open-source Web application for the improvement of compliance with research regulation

    Directory of Open Access Journals (Sweden)

    Martins Henrique

    2006-07-01

    release as an open-source application will promote improved and streamlined regulatory processes for individual academic centers as well as larger research networks.

  13. Creating Open Source Conversation

    Science.gov (United States)

    Sheehan, Kate

    2009-01-01

    Darien Library, where the author serves as head of knowledge and learning services, launched a new website on September 1, 2008. The website is built with Drupal, an open source content management system (CMS). In this article, the author describes how she and her colleagues overhauled the library's website to provide an open source content…

  14. Open source community organization

    CSIR Research Space (South Africa)

    Molefe, Onkgopotse M

    2009-05-01

    Full Text Available Open Source communities (OSCs), sometimes referred to as virtual or online communities play a significant role in terms of the contribution they continue to make in producing user-friendly Open Source Software (OSS) solutions. Many projects have...

  15. Creating Open Source Conversation

    Science.gov (United States)

    Sheehan, Kate

    2009-01-01

    Darien Library, where the author serves as head of knowledge and learning services, launched a new website on September 1, 2008. The website is built with Drupal, an open source content management system (CMS). In this article, the author describes how she and her colleagues overhauled the library's website to provide an open source content…

  16. Open source molecular modeling.

    Science.gov (United States)

    Pirhadi, Somayeh; Sunseri, Jocelyn; Koes, David Ryan

    2016-09-01

    The success of molecular modeling and computational chemistry efforts are, by definition, dependent on quality software applications. Open source software development provides many advantages to users of modeling applications, not the least of which is that the software is free and completely extendable. In this review we categorize, enumerate, and describe available open source software packages for molecular modeling and computational chemistry. An updated online version of this catalog can be found at https://opensourcemolecularmodeling.github.io.

  17. Open Source Telecommunication Companies

    Directory of Open Access Journals (Sweden)

    Peter Liu

    2007-08-01

    Full Text Available Little is known about companies whose core business is selling telecommunications products that lever open source projects. Open source telecommunications (OST companies operate in markets that are very different from typical software product markets. The telecommunications market is regulated, vertically integrated, and proprietary designs and special chips are widely used. For a telecommunications product to be useful, it must interact with both access network products and core network products. Due to specifications in Service Agreements Levels, penalties for failures of telecommunications products are very high. This article shares information that is not widely known, including a list of OST companies and the open source projects on which they depend, the size and diversity of venture capital investment in OST companies, the nature of the commercial product-open source software and company-project relationships, ways in which OST companies make money, benefits and risks of OST companies, and competition between OST companies. Analysis of this information provides insights into the ways in which companies can build business models around open source software. These findings will be of interest to entrepreneurs, top management teams of incumbent companies that sell telecommunications products, and those who care about Ontario's ability to compete globally.

  18. Open Source Software Acquisition

    DEFF Research Database (Denmark)

    Holck, Jesper; Kühn Pedersen, Mogens; Holm Larsen, Michael

    2005-01-01

    Lately we have seen a growing interest from both public and private organisations to adopt OpenSource Software (OSS), not only for a few, specific applications but also on a more general levelthroughout the organisation. As a consequence, the organisations' decisions on adoption of OSS arebecoming...

  19. Open source development

    DEFF Research Database (Denmark)

    Ulhøi, John Parm

    2004-01-01

    This paper addresses innovations based on open source or non-proprietary knowledge. Viewed through the lens of private property theory, such agency appears to be a true anomaly. However, by a further turn of the theoretical kaleidoscope, we will show that there may be perfectly justifiable reason...

  20. Evaluating Open Source Portals

    Science.gov (United States)

    Goh, Dion; Luyt, Brendan; Chua, Alton; Yee, See-Yong; Poh, Kia-Ngoh; Ng, How-Yeu

    2008-01-01

    Portals have become indispensable for organizations of all types trying to establish themselves on the Web. Unfortunately, there have only been a few evaluative studies of portal software and even fewer of open source portal software. This study aims to add to the available literature in this important area by proposing and testing a checklist for…

  1. Open Source in Education

    Science.gov (United States)

    Lakhan, Shaheen E.; Jhunjhunwala, Kavita

    2008-01-01

    Educational institutions have rushed to put their academic resources and services online, beginning the global community onto a common platform and awakening the interest of investors. Despite continuing technical challenges, online education shows great promise. Open source software offers one approach to addressing the technical problems in…

  2. Open-Source Colorimeter

    Science.gov (United States)

    Anzalone, Gerald C.; Glover, Alexandra G.; Pearce, Joshua M.

    2013-01-01

    The high cost of what have historically been sophisticated research-related sensors and tools has limited their adoption to a relatively small group of well-funded researchers. This paper provides a methodology for applying an open-source approach to design and development of a colorimeter. A 3-D printable, open-source colorimeter utilizing only open-source hardware and software solutions and readily available discrete components is discussed and its performance compared to a commercial portable colorimeter. Performance is evaluated with commercial vials prepared for the closed reflux chemical oxygen demand (COD) method. This approach reduced the cost of reliable closed reflux COD by two orders of magnitude making it an economic alternative for the vast majority of potential users. The open-source colorimeter demonstrated good reproducibility and serves as a platform for further development and derivation of the design for other, similar purposes such as nephelometry. This approach promises unprecedented access to sophisticated instrumentation based on low-cost sensors by those most in need of it, under-developed and developing world laboratories. PMID:23604032

  3. Open source posturography.

    Science.gov (United States)

    Rey-Martinez, Jorge; Pérez-Fernández, Nicolás

    2016-12-01

    The proposed validation goal of 0.9 in intra-class correlation coefficient was reached with the results of this study. With the obtained results we consider that the developed software (RombergLab) is a validated balance assessment software. The reliability of this software is dependent of the used force platform technical specifications. Develop and validate a posturography software and share its source code in open source terms. Prospective non-randomized validation study: 20 consecutive adults underwent two balance assessment tests, six condition posturography was performed using a clinical approved software and force platform and the same conditions were measured using the new developed open source software using a low cost force platform. Intra-class correlation index of the sway area obtained from the center of pressure variations in both devices for the six conditions was the main variable used for validation. Excellent concordance between RombergLab and clinical approved force platform was obtained (intra-class correlation coefficient =0.94). A Bland and Altman graphic concordance plot was also obtained. The source code used to develop RombergLab was published in open source terms.

  4. Towards an open-source semantic data infrastructure for integrating clinical and scientific data in cognition-guided surgery

    Science.gov (United States)

    Fetzer, Andreas; Metzger, Jasmin; Katic, Darko; März, Keno; Wagner, Martin; Philipp, Patrick; Engelhardt, Sandy; Weller, Tobias; Zelzer, Sascha; Franz, Alfred M.; Schoch, Nicolai; Heuveline, Vincent; Maleshkova, Maria; Rettinger, Achim; Speidel, Stefanie; Wolf, Ivo; Kenngott, Hannes; Mehrabi, Arianeb; Müller-Stich, Beat P.; Maier-Hein, Lena; Meinzer, Hans-Peter; Nolden, Marco

    2016-03-01

    In the surgical domain, individual clinical experience, which is derived in large part from past clinical cases, plays an important role in the treatment decision process. Simultaneously the surgeon has to keep track of a large amount of clinical data, emerging from a number of heterogeneous systems during all phases of surgical treatment. This is complemented with the constantly growing knowledge derived from clinical studies and literature. To recall this vast amount of information at the right moment poses a growing challenge that should be supported by adequate technology. While many tools and projects aim at sharing or integrating data from various sources or even provide knowledge-based decision support - to our knowledge - no concept has been proposed that addresses the entire surgical pathway by accessing the entire information in order to provide context-aware cognitive assistance. Therefore a semantic representation and central storage of data and knowledge is a fundamental requirement. We present a semantic data infrastructure for integrating heterogeneous surgical data sources based on a common knowledge representation. A combination of the Extensible Neuroimaging Archive Toolkit (XNAT) with semantic web technologies, standardized interfaces and a common application platform enables applications to access and semantically annotate data, perform semantic reasoning and eventually create individual context-aware surgical assistance. The infrastructure meets the requirements of a cognitive surgical assistant system and has been successfully applied in various use cases. The system is based completely on free technologies and is available to the community as an open-source package.

  5. Open Source Physics

    CERN Document Server

    Wee, Loo Kang

    2013-01-01

    Open Source Physics (Brown, 2012; Christian, 2010; Esquembre, 2012; Hwang, 2010) empowers teachers and students to create and use these free tools with the associated intellectual property rights given to customise (Wee & Mak, 2009) the computer models/tools to suit their teaching and learning needs. Open Source Physics (OSP) focuses on design of computer models, such as Easy Java Simulations (EJS) and the use of video modeling and analysis (Tracker). They allow students to investigate, explore and analyse data which is either real or simulated. The OSP approach helps users overcome barriers in creating, using and scaling up meaningful ICT use in education. In Singapore, teachers and students have created or customised existing computer models to design and re-purpose EJS models to suit their context and learning needs. Tracker tools allow students to analyse different aspects of a physics phenomena to deepen their understanding of abstract physics concepts. Using Tracker, students record the motion of ob...

  6. Open-Source GIS

    Energy Technology Data Exchange (ETDEWEB)

    Vatsavai, Raju [ORNL; Burk, Thomas E [University of Minnesota; Lime, Steve [Minnesota Department of Natural Resources

    2012-01-01

    The components making up an Open Source GIS are explained in this chapter. A map server (Sect. 30.1) can broadly be defined as a software platform for dynamically generating spatially referenced digital map products. The University of Minnesota MapServer (UMN Map Server) is one such system. Its basic features are visualization, overlay, and query. Section 30.2 names and explains many of the geospatial open source libraries, such as GDAL and OGR. The other libraries are FDO, JTS, GEOS, JCS, MetaCRS, and GPSBabel. The application examples include derived GIS-software and data format conversions. Quantum GIS, its origin and its applications explained in detail in Sect. 30.3. The features include a rich GUI, attribute tables, vector symbols, labeling, editing functions, projections, georeferencing, GPS support, analysis, and Web Map Server functionality. Future developments will address mobile applications, 3-D, and multithreading. The origins of PostgreSQL are outlined and PostGIS discussed in detail in Sect. 30.4. It extends PostgreSQL by implementing the Simple Feature standard. Section 30.5 details the most important open source licenses such as the GPL, the LGPL, the MIT License, and the BSD License, as well as the role of the Creative Commons.

  7. Open Source Software Acquisition

    DEFF Research Database (Denmark)

    Holck, Jesper; Kühn Pedersen, Mogens; Holm Larsen, Michael

    2005-01-01

    Lately we have seen a growing interest from both public and private organisations to adopt OpenSource Software (OSS), not only for a few, specific applications but also on a more general levelthroughout the organisation. As a consequence, the organisations' decisions on adoption of OSS arebecoming......, in smaller organisations and in small-scale adoption of OSS, the cheapprice of OSS is a major enabler, as it provides a good opportunity for experiments and short-termeconomic benefits. For small organisations these experiments can lead to development of a commonIT-architecture, and in larger organisations...

  8. Een boekje open over Open Source ERP

    NARCIS (Netherlands)

    Sneller, A.C.W.(L.)

    2009-01-01

    Er zijn vele ERP-systemen die met behulp van open source worden ontwikkeld. Organisaties die open source ERP willen implementeren staan voor twee strategische keuzes: hoe zit het met de continuïteit en wie gaat het systeem onderhouden?

  9. SOFTWARE OPEN SOURCE, SOFTWARE GRATIS?

    Directory of Open Access Journals (Sweden)

    Nur Aini Rakhmawati

    2006-01-01

    Full Text Available Normal 0 false false false IN X-NONE X-NONE MicrosoftInternetExplorer4 Berlakunya Undang – undang Hak Atas Kekayaan Intelektual (HAKI, memunculkan suatu alternatif baru untuk menggunakan software open source. Penggunaan software open source menyebar seiring dengan isu global pada Information Communication Technology (ICT saat ini. Beberapa organisasi dan perusahaan mulai menjadikan software open source sebagai pertimbangan. Banyak konsep mengenai software open source ini. Mulai dari software yang gratis sampai software tidak berlisensi. Tidak sepenuhnya isu software open source benar, untuk itu perlu dikenalkan konsep software open source mulai dari sejarah, lisensi dan bagaimana cara memilih lisensi, serta pertimbangan dalam memilih software open source yang ada. Kata kunci :Lisensi, Open Source, HAKI

  10. Open access and open source in chemistry

    Directory of Open Access Journals (Sweden)

    Todd Matthew H

    2007-02-01

    Full Text Available Abstract Scientific data are being generated and shared at ever-increasing rates. Two new mechanisms for doing this have developed: open access publishing and open source research. We discuss both, with recent examples, highlighting the differences between the two, and the strengths of both.

  11. Defining Open Source

    Directory of Open Access Journals (Sweden)

    Russ Nelson

    2007-09-01

    Full Text Available The Open Source Initiative and the Free Software Foundation share a common goal: that everyone should be free to modify and redistribute the software they commonly use. 'Should' is of course a normative word. For the FSF, 'should' is a moral imperative. Anything else is an immoral restriction on people's activities, just as are restrictions on speech, press, movement, and religion. For the OSI, freedom is a necessary precondition for a world where "software doesn't suck", in the words of a founder of the OSI. The FSF started from its founder's GNU Manifesto widely published in 1985. Given the manifesto's hostility to copyright, and given the failure of the Free Software Foundation to gain any traction amongst commercial users of software even with a 13-year head start, a group of people gathered together in 1998 to talk about a new strategy to get the corporate world to listen to hackers. They were impressed by Eric Raymond's Cathedral and the Bazaar's take-up among business leaders.

  12. Editorial: Open Source in Government

    Directory of Open Access Journals (Sweden)

    Dru Lavigne

    2009-04-01

    Full Text Available Last summer, the Center for Strategic and International Studies published the sixth update to their Open Source Policy survey. The survey "tracks governmental policies on the use of open source software as reported in the press or other media." The report lists 275 open source policy initiatives. It also breaks down by country and by government level whether the policy on the use of open source is considered to be advisory, preferential, or mandatory. The editorial theme for the May issue of the OSBR is "open source in government" and we are pleased that the authors have drawn upon their experiences to provide insight into public policy regarding open source for many parts of the world.

  13. Open Source, Open Access, Open Review, Open Data. Initiativen zu mehr Offenheit in der digitalen Welt

    OpenAIRE

    Herb, Ulrich

    2011-01-01

    The article discusses the principles of openess, open access and open availability of information based on the examples of open access to scientific information, open government data, open geographical data and open source software.

  14. Open Source, Open Access, Open Review, Open Data. Initiativen zu mehr Offenheit in der digitalen Welt

    OpenAIRE

    Herb, Ulrich

    2011-01-01

    The article discusses the principles of openess, open access and open availability of information based on the examples of open access to scientific information, open government data, open geographical data and open source software.

  15. Handbook of Open Source Tools

    CERN Document Server

    Koranne, Sandeep

    2011-01-01

    Handbook of Open Source Tools introduces a comprehensive collection of advanced open source tools useful in developing software applications. The book contains information on more than 200 open-source tools which include software construction utilities for compilers, virtual-machines, database, graphics, high-performance computing, OpenGL, geometry, algebra, graph theory , GUIs and more. Special highlights for software construction utilities and application libraries are included. Each tool is covered in the context of a real like application development setting. This unique handbook presents

  16. Open Source Vulnerability Database Project

    Directory of Open Access Journals (Sweden)

    Jake Kouns

    2008-06-01

    Full Text Available This article introduces the Open Source Vulnerability Database (OSVDB project which manages a global collection of computer security vulnerabilities, available for free use by the information security community. This collection contains information on known security weaknesses in operating systems, software products, protocols, hardware devices, and other infrastructure elements of information technology. The OSVDB project is intended to be the centralized global open source vulnerability collection on the Internet.

  17. Laparoscopic surgery compared with open surgery decreases surgical site infection in obese patients

    DEFF Research Database (Denmark)

    Shabanzadeh, Daniel M; Sørensen, Lars T

    2012-01-01

    : To compare surgical site infections rate in obese patients after laparoscopic surgery with open general abdominal surgery.......: To compare surgical site infections rate in obese patients after laparoscopic surgery with open general abdominal surgery....

  18. Rapid and efficient localization of depth electrodes and cortical labeling using free and open source medical software in epilepsy surgery candidates

    Science.gov (United States)

    Princich, Juan Pablo; Wassermann, Demian; Latini, Facundo; Oddo, Silvia; Blenkmann, Alejandro Omar; Seifer, Gustavo; Kochen, Silvia

    2013-01-01

    Depth intracranial electrodes (IEs) placement is one of the most used procedures to identify the epileptogenic zone (EZ) in surgical treatment of drug resistant epilepsy patients, about 20–30% of this population. IEs localization is therefore a critical issue defining the EZ and its relation with eloquent functional areas. That information is then used to target the resective surgery and has great potential to affect outcome. We designed a methodological procedure intended to avoid the need for highly specialized medical resources and reduce time to identify the anatomical location of IEs, during the first instances of intracranial EEG recordings. This workflow is based on established open source software; 3D Slicer and Freesurfer that uses MRI and Post-implant CT fusion for the localization of IEs and its relation with automatic labeled surrounding cortex. To test this hypothesis we assessed the time elapsed between the surgical implantation process and the final anatomical localization of IEs by means of our proposed method compared against traditional visual analysis of raw post-implant imaging in two groups of patients. All IEs were identified in the first 24 H (6–24 H) of implantation using our method in 4 patients of the first group. For the control group; all IEs were identified by experts with an overall time range of 36 h to 3 days using traditional visual analysis. It included (7 patients), 3 patients implanted with IEs and the same 4 patients from the first group. Time to localization was restrained in this group by the specialized personnel and the image quality available. To validate our method; we trained two inexperienced operators to assess the position of IEs contacts on four patients (5 IEs) using the proposed method. We quantified the discrepancies between operators and we also assessed the efficiency of our method to define the EZ comparing the findings against the results of traditional analysis. PMID:24427112

  19. Rapid and efficient localization of depth electrodes and cortical labeling using free and open source medical software in epilepsy surgery candidates.

    Science.gov (United States)

    Princich, Juan Pablo; Wassermann, Demian; Latini, Facundo; Oddo, Silvia; Blenkmann, Alejandro Omar; Seifer, Gustavo; Kochen, Silvia

    2013-01-01

    Depth intracranial electrodes (IEs) placement is one of the most used procedures to identify the epileptogenic zone (EZ) in surgical treatment of drug resistant epilepsy patients, about 20-30% of this population. IEs localization is therefore a critical issue defining the EZ and its relation with eloquent functional areas. That information is then used to target the resective surgery and has great potential to affect outcome. We designed a methodological procedure intended to avoid the need for highly specialized medical resources and reduce time to identify the anatomical location of IEs, during the first instances of intracranial EEG recordings. This workflow is based on established open source software; 3D Slicer and Freesurfer that uses MRI and Post-implant CT fusion for the localization of IEs and its relation with automatic labeled surrounding cortex. To test this hypothesis we assessed the time elapsed between the surgical implantation process and the final anatomical localization of IEs by means of our proposed method compared against traditional visual analysis of raw post-implant imaging in two groups of patients. All IEs were identified in the first 24 H (6-24 H) of implantation using our method in 4 patients of the first group. For the control group; all IEs were identified by experts with an overall time range of 36 h to 3 days using traditional visual analysis. It included (7 patients), 3 patients implanted with IEs and the same 4 patients from the first group. Time to localization was restrained in this group by the specialized personnel and the image quality available. To validate our method; we trained two inexperienced operators to assess the position of IEs contacts on four patients (5 IEs) using the proposed method. We quantified the discrepancies between operators and we also assessed the efficiency of our method to define the EZ comparing the findings against the results of traditional analysis.

  20. Rapid and efficient localization of depth electrodes and cortical labeling using free and open source medical software in epilepsy surgery candidates

    Directory of Open Access Journals (Sweden)

    Juan Pablo Princich

    2013-12-01

    Full Text Available Depth intracranial electrodes (IEs placement is one of the most used procedures to identify the epileptogenic zone (EZ in surgical treatment of drug resistant epilepsy patients, about 20-30% of this population. IEs localization is therefore a critical issue defining the EZ and its relation with eloquent functional areas. That information is then used to target the resective surgery and has great potential to affect outcome.We designed a methodological procedure intended to avoid the need for highly specialized medical resources and reduce time to identify the anatomical location of IEs, during the first instances of intracranial EEG recordings. This workflow is based on established open source software; 3D Slicer and Freesurfer that uses MRI and Post-implant CT fusion for the localization of IEs and its relation with automatic labeled surrounding cortex. To test this hypothesis we assessed the time elapsed between the surgical implantation process and the final anatomical localization of IEs by means of our proposed method compared against traditional visual analysis of raw post-implant imaging in two groups of patients.All IEs were identified in the first 24 Hs (6-24 Hs of implantation using our method in 4 patients of the first group. For the control group; all IEs were identified by experts with an overall time range of 36 h to 3 days using traditional visual analysis. It included (7 patients, 3 patients implanted with IEs and the same 4 patients from the first group. Time to localization was restrained in this group by the specialized personnel and the image quality available.To validate our method; we trained two inexperienced operators to assess the position of IEs contacts on four patients (5 intracranial electrodes using the proposed method. We quantified the discrepancies between operators and we also assessed the efficiency of our method to define the EZ comparing the findings against the results of traditional analysis.

  1. Open Source Fundamental Industry Classification

    OpenAIRE

    Kakushadze, Zura; Yu, Willie

    2017-01-01

    We provide complete source code for building a fundamental industry classification based on publically available and freely downloadable data. We compare various fundamental industry classifications by running a horserace of short-horizon trading signals (alphas) utilizing open source heterotic risk models (https://ssrn.com/abstract=2600798) built using such industry classifications. Our source code includes various stand-alone and portable modules, e.g., for downloading/parsing web data, etc.

  2. Refurbishment and open source software

    CSIR Research Space (South Africa)

    Mabuza, S

    2006-11-01

    Full Text Available  & Open Source Software Electronic Waste Management Conference 2006 Sibongile Mabuza 2 Presentation Outline  About Meraka Institute Open Source Centre  Background to OSS  Extending life span using OSS  Different choices for different situations  Examples... Linux  Thin Client   LTSP (Linux Terminal Server Project)  12 Linux Applications for Old  computers  Linux LiveCD Router  FreeS/WAN  Print Server 13 Examples of OSS use on  Refurbished computers Open Source Centre – Soweto Tux...

  3. Validation of open-surgery VR trainer

    NARCIS (Netherlands)

    Sanders, A.J.B.; Luursema, J.M.; Warntjes, P.; Mastboom, W.J.B.; Geelkerken, R.H.; Klaase, J.M.; Rödel, S.G.J.; ten Cate Hoedemaker, H.O.; Kommers, P.A.M.; Verwey, W.B.; Kunst, E.E.; Westwood, James D.

    2006-01-01

    VREST (Virtual Reality Educational Surgical Tools) is developing a universal and autonomous simulation platform which can be used for training and assessment of medical students and for continuing education of physicians. With the VREST - Virtual Lichtenstein Trainer, simulating the open surgery

  4. Validation of open-surgery VR trainer

    NARCIS (Netherlands)

    Sanders, A.J.B.; Luursema, J.-M.; Warntjes, P.; Mastboom, W.J.B.; Geelkerken, R.H.; Klaase, J.M.; Rodel, S.G.J.; Cate Hoedemaker, ten H.O.; Kommers, P.A.M.; Verwey, W.B.; Kunst, E.E.; Westwood, J.D.

    2006-01-01

    VREST (Virtual Reality Educational Surgical Tools) is developing a universal and autonomous simulation platform which can be used for training and assessment of medical students and for continuing education of physicians. With the VREST - Virtual Lichtenstein Trainer, simulating the open surgery pro

  5. Penetration Tester's Open Source Toolkit

    CERN Document Server

    Faircloth, Jeremy

    2011-01-01

    Great commercial penetration testing tools can be very expensive and sometimes hard to use or of questionable accuracy. This book helps solve both of these problems. The open source, no-cost penetration testing tools presented do a great job and can be modified by the user for each situation. Many tools, even ones that cost thousands of dollars, do not come with any type of instruction on how and in which situations the penetration tester can best use them. Penetration Tester's Open Source Toolkit, Third Edition, expands upon existing instructions so that a professional can get the most accura

  6. Open source systems security certification

    CERN Document Server

    Damiani, Ernesto; El Ioini, Nabil

    2009-01-01

    Open Source Advances in Computer Applications book series provides timely technological and business information for: Enabling Open Source Systems (OSS) to become an integral part of systems and devices produced by technology companies; Inserting OSS in the critical path of complex network development and embedded products, including methodologies and tools for domain-specific OSS testing (lab code available), plus certification of security, dependability and safety properties for complex systems; Ensuring integrated systems, including OSS, meet performance and security requirements as well as achieving the necessary certifications, according to the overall strategy of OSS usage on the part of the adopter

  7. Spontaneous bleeding from liver after open heart surgery.

    Science.gov (United States)

    Mir, Najeeb H; Shah, Mian T; Obeid, Mahmoud Ali; Gallo, Ricardo; Aliter, Hashem

    2013-01-01

    Intra-abdominal hemorrhage after open heart surgery is very uncommon in routine clinical practice. There are case reports of having bleeding from spleen or liver after starting low molecular weight heparin (LMWH) postoperatively. Our patient is a 58-year-old man with mitral valve regurgitation, who underwent mitral valve repair and developed intra-abdominal hemorrhage 8h after open heart surgery. The exploratory laparotomy revealed the source of bleeding from ruptured sub-capsular liver hematoma and oozing from raw areas of the liver surface. Liver packing was done to control the bleeding. The gastrointestinal complications after open heart surgery are rare and spontaneous bleeding from spleen has been reported. This is the first case from our hospital to have intra-abdominal hemorrhage after open heart surgery. Spontaneous bleeding from liver is a possible complication after open heart surgery. We submit the case for the academic interest and to discuss the possible cause of hemorrhage. Copyright © 2013 The Authors. Published by Elsevier Ltd.. All rights reserved.

  8. THE OPEN SOURCING OF EPANET

    Science.gov (United States)

    A proposal was made at the 2009 EWRI Congress in Kansas City, MO to establish an Open Source Project (OSP) for the widely used EPANET pipe network analysis program. This would be an ongoing collaborative effort among a group of geographically dispersed advisors and developers, wo...

  9. Open Source Wifi Hotspot Implementation

    Directory of Open Access Journals (Sweden)

    Tyler Sondag

    2007-06-01

    Full Text Available The goal of this paper is to describe a design—including the hardware, software, and configuration––for an open source wireless network. The network designed will require authentication. While care will be taken to keep the authentication exchange secure, the network will otherwise transmit data without encryption.

  10. Open Standards, Open Source, and Open Innovation: Harnessing the Benefits of Openness

    Science.gov (United States)

    Committee for Economic Development, 2006

    2006-01-01

    Digitization of information and the Internet have profoundly expanded the capacity for openness. This report details the benefits of openness in three areas--open standards, open-source software, and open innovation--and examines the major issues in the debate over whether openness should be encouraged or not. The report explains each of these…

  11. Laparoscopic and open surgery for pheochromocytoma

    Directory of Open Access Journals (Sweden)

    Mala Tom

    2001-08-01

    Full Text Available Abstract Backround Laparoscopic adrenalectomy is a promising alternative to open surgery although concerns exist in regard to laparoscopic treatment of pheocromocytoma. This report compares the outcome of laparoscopic and conventional (open resection for pheocromocytoma particular in regard to intraoperative hemodynamic stability and postoperative patient comfort. Methods Seven patients laparoscopically treated (1997–2000 and nine patients treated by open resection (1990–1996 at the National Hospital (Rikshospitalet, Oslo. Peroperative hemodynamic stability including need of vasoactive drugs was studied. Postoperative analgesic medication, complications and hospital stay were recorded. Results No laparoscopic resections were converted to open procedure. Patients laparoscopically treated had fewer hypertensive episodes (median 1 vs. 2 and less need of vasoactive drugs peroperatively than patients conventionally operated. There was no difference in operative time between the two groups (median 110 min vs. 125 min for adrenal pheochromocytoma and 235 vs. 210 min for paraganglioma. Postoperative need of analgesic medication (1 vs. 9 patients and hospital stay (median 3 vs. 6 days were significantly reduced in patients laparoscopically operated compared to patients treated by the open technique. Conclusion Surgery for pheochromocytoma can be performed laparoscopically with a safety comparable to open resection. However, improved hemodynamic stability peroperatively and less need of postoperative analgesics favour the laparoscopic approach. In experienced hands the laparoscopic technique is concluded to be the method of choice also for pheocromocytoma.

  12. Power sources in endoscopic surgery.

    Science.gov (United States)

    Sutton, C

    1995-08-01

    The power sources used in endoscopic surgery are varied and numerous, and will continue to improve as technology progresses. Early attempts at operative laparoscopy were crude, limited by the available instrumentation, and tended to be frustrating: scissors that had to be frequently sharpened and endocoagulators that took a seemingly interminable time to achieve their tissue effect. New developements in ultrasonic energy and different wavelengths of laser energy are used alongside increasingly sophisticated electrosurgical tools, employing both monopolar and bipolar systems, and innovative delivery systems such as the argon beam coagulator and the Helica Thermal Coagulator. All of these systems have their advocates and their detractors, but in the end the choice of power source is determined by the type of equipment that the operator feels most comfortable with. The surgeon must have a detailed knowledge of the physical concepts required to generate the power source, and be able to understand the complications that can be created by the energy, how to avoid them, how and to deal with them if they occur. Although there are subtle differences in the reaction of the different energy sources with human tissue, the clinical outcome appears to be much the same, and depends more on the skill of the individual surgeon than the power source employed.

  13. LAPAROSCOPIC VS. OPEN SURGERY FOR CHOLECYSTECTOMY

    Directory of Open Access Journals (Sweden)

    Preetham

    2016-03-01

    Full Text Available INTRODUCTION Cholecystectomy in a layman language is the surgical removal of the bile duct. There is a plethora of pathologies of gall bladder in which the main mode of treatment is cholecystectomy. In an economy like India the Laparoscopic surgery may not be economic taking into consideration of the cost factor. The main aim of the study is to find out the pros and cons for each method used in cholecystectomy. The best way to operate is the laparoscopic. But the conventional open access surgery has to be used whenever the need arises. The cost effectiveness of the laparoscopic surgery has to be worked out for the better usage of the procedure

  14. An 'open source' networked identity

    DEFF Research Database (Denmark)

    Larsen, Malene Charlotte

    2013-01-01

    , but also an important part of their self-presentation online. It is discussed why these emotional statements are almost always publically available – or even strategically, intentionally placed on the young people's profiles. In relation to this, it is argued that young people – through their emotional...... communicative actions – are not only performing their own identity, but are becoming co-constructors of each other's identities, which the author characterizes as an 'open source' networked identity....

  15. The Open Source Hardening Project

    Science.gov (United States)

    2009-07-01

    code on a recurring basis from more than 250 open popular source projects such as Firefox, Linux, and PHP . This represents 14,238 individual project...gcc) greatly simplifies debugging and error reporting. For exam- ple, all COREUTILS bugs were confirmed and fixed within two days and versions of the...making system calls fail outside of KLEE — we built a simple utility that uses the ptrace debugging interface to skip the system calls that were

  16. Laparoscopic versus open surgery for rectal cancer (COLOR II)

    DEFF Research Database (Denmark)

    van der Pas, Martijn Hgm; Haglind, Eva; Cuesta, Miguel A

    2013-01-01

    Laparoscopic surgery as an alternative to open surgery in patients with rectal cancer has not yet been shown to be oncologically safe. The aim in the COlorectal cancer Laparoscopic or Open Resection (COLOR II) trial was to compare laparoscopic and open surgery in patients with rectal cancer....

  17. Practical open source software for libraries

    CERN Document Server

    Engard, Nicole

    2010-01-01

    Open source refers to an application whose source code is made available for use or modification as users see fit. This means libraries gain more flexibility and freedom than with software purchased with license restrictions. Both the open source community and the library world live by the same rules and principles. Practical Open Source Software for Libraries explains the facts and dispels myths about open source. Chapters introduce librarians to open source and what it means for libraries. The reader is provided with links to a toolbox full of freely available open source products to use in

  18. When to make proprietary software open source

    NARCIS (Netherlands)

    Caulkins, J.P.; Feichtinger, G.; Grass, D.; Hartl, R.F.; Kort, P.M.; Seidl, A.

    2013-01-01

    Software can be distributed closed source (proprietary) or open source (developed collaboratively). While a firm cannot sell open source software, and so loses potential sales revenue, the open source software development process can have a substantial positive impact on the quality of a software, i

  19. Upper gastrointestinal bleeding after open heart surgery

    Directory of Open Access Journals (Sweden)

    Aithoussa Mahdi

    2014-01-01

    Full Text Available Objective: The occurrence of digestive complications especially upper gastrointestinal bleeding (UGIB has increased after cardiac surgery. The aim of this study was to determine the incidence of UGIB and identify the independent risk factors. Materials and Methods: We retrospectively analyzed data of 1077 patients undergoing cardiopulmonary bypass (CPB from 1994 to 2012 The group of patients with UGIB (n1 = 20 was compared with the population group (n2 = 1057. Demographic characteristics, therapeutic management, endoscopic findings, and outcomes were analyzed. Through a regression analysis we identified independent risk factors of UGIB. Results: The mean age of the group n1 was 58.2 ± 12.4 years and 50.18 ± 13.5 years in the group n2 . UGIB occurred about 13 ± 5.5 days after cardiac surgery. Gastroduodenal ulcer was the most common etiology of hemorrhage (n = 13, 65%. Renal insufficiency, previous gastric ulcer, increased lactate concentration during CPB, prolonged mechanical ventilation, use of vasopressor drug and pulmonary infection was likely contributing factors in UGIB. Conclusion: UGIB following open cardiac surgery is most frequently secondary to gastroduodenal ulceration. Many determinant factors of bleeding are incriminated. Surgeons must be aware of these factors to avoid fatal complications.

  20. Contribution to Asterisk Open Source Project

    OpenAIRE

    González Martín, Sergio

    2009-01-01

    With this final master thesis we are going to contribute to the Asterisk open source project. Asterisk is an open source project that started with the main objective of develop an IP telephony platform, completely based on Software (so not hardware dependent) and under an open license like GPL. This project was started on 1999 by the software engineer Mark Spencer at Digium. The main motivation of that open source project was that the telecommunications sector is lack of open solutions, and m...

  1. Evolution of open source networks in industry

    NARCIS (Netherlands)

    de Laat, P.B.

    2004-01-01

    The open source software movement has become a threat to corporate software development. In response, companies started to develop products and services related to open source software. Subsequently, they also tried to come to terms with the processes that are characteristic of open source software

  2. Future of Open Source systems

    Directory of Open Access Journals (Sweden)

    Karel Charvát

    2010-02-01

    Full Text Available Software distribution strategies have many aspects and can be analysed by reviewing different incisions of a strategy. The focus of this paper is on Licensing aspect involves licensing strategy, licensing risks, licensing enforcement costs. Furthermore, by formulating licensing strategy main technical and logistical aspects are predicted also. The key issues of this paper are different business modes for FOSS software and also SWOT analysis of usage and development of FOSS software from point of view of different user groups. This analysis was provided as part of work of Humboldt IP and collaborative@rural IP. Currently this strategy are important issue of members of Czech Centre for Science and Society and WirelessInfo Living Lab, where the models based on dual licensing are key strategy.Keywords: Open Source, Licensing, FOSS base business models. SWOT analysis, Knowledge society, Knowledge economy

  3. Open Source Seismic Hazard Analysis Software Framework (OpenSHA)

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — OpenSHA is an effort to develop object-oriented, web- & GUI-enabled, open-source, and freely available code for conducting Seismic Hazard Analyses (SHA). Our...

  4. [Complicated acute apendicitis. Open versus laparoscopic surgery].

    Science.gov (United States)

    Gil Piedra, Francisco; Morales García, Dieter; Bernal Marco, José Manuel; Llorca Díaz, Javier; Marton Bedia, Paula; Naranjo Gómez, Angel

    2008-06-01

    Although laparoscopy has become the standard approach in other procedures, this technique is not generally accepted for acute appendicitis, especially if it is complicated due reports on the increase in intra-abdominal abscesses. The purpose of this study was to evaluate the morbidity in a group of patients diagnosed with complicated apendicitis (gangrenous or perforated) who had undergone open or laparoscopic appendectomy. We prospectively studied 107 patients who had undergone appendectomy for complicated appendicitis over a two year period. Mean operation time, mean hospital stay and morbidity, such as wound infection and intra-abdominal abscess were evaluated. In the group with gangrenous appendicitis morbidity was significantly lower in laparoscopic appendectomy group (p = 0.014). Wound infection was significantly higher in the open appendectomy group (p = 0.041), and there were no significant differences in intra-abdominal abscesses (p = 0.471). In the perforated appendicitis group overall morbidity (p = 0.046) and wound infection (p = 0.004) was significantly higher in the open appendectomy group. There were no significant differences in intra-abdominal abscesses (p = 0.612). These results suggest that laparoscopic appendectomy for complicated appendicitis is a safe procedure that may prove to have significant clinical advantages over conventional surgery.

  5. The Commercial Open Source Business Model

    Science.gov (United States)

    Riehle, Dirk

    Commercial open source software projects are open source software projects that are owned by a single firm that derives a direct and significant revenue stream from the software. Commercial open source at first glance represents an economic paradox: How can a firm earn money if it is making its product available for free as open source? This paper presents the core properties of com mercial open source business models and discusses how they work. Using a commercial open source approach, firms can get to market faster with a superior product at lower cost than possible for traditional competitors. The paper shows how these benefits accrue from an engaged and self-supporting user community. Lacking any prior comprehensive reference, this paper is based on an analysis of public statements by practitioners of commercial open source. It forges the various anecdotes into a coherent description of revenue generation strategies and relevant business functions.

  6. Mechanical bowel preparation in elective open colon surgery

    OpenAIRE

    Fa-Si-Oen, Patrick Regnier

    2006-01-01

    Mechanical bowel preparation is a long standing practice in elective open colon surgery dating from the 1970's. It has always been believed to reduce the rate of postoperative complications in the form of anastomotic leakage and wound infection. In this thesis we broadly and thoroughly examine the various aspects and the value of mechanical bowel preparation in elective open colon surgery. - Mechanical bowel preparation in elective open colon surgery does not reduce the rate of anastomotic le...

  7. Open Genetic Code: on open source in the life sciences

    NARCIS (Netherlands)

    Deibel, E.

    2014-01-01

    The introduction of open source in the life sciences is increasingly being suggested as an alternative to patenting. This is an alternative, however, that takes its shape at the intersection of the life sciences and informatics. Numerous examples can be identified wherein open source in the life

  8. Decreased risk of surgery for small bowel obstruction after laparoscopic colon cancer surgery compared with open surgery

    DEFF Research Database (Denmark)

    Jensen, Kristian Kiim; Erichsen, Rune; Scheike, Thomas

    2016-01-01

    . The HR for mortality after colonic resection was 2.54 (CI 1.91 to 3.38, P surgery as compared to those who did not. CONCLUSIONS: Laparoscopic surgery for colonic cancer was associated with a decreased risk of subsequent SBO surgery compared with open...... surgery. Further, subsequent SBO surgery was associated with increased mortality after colonic cancer resection.......BACKGROUND: The impact of surgical approach on the incidence of small bowel obstruction (SBO) is unclear. The aim of the current study was to analyze the long-term risk of surgery for SBO after open and laparoscopic surgery and to assess how subsequent SBO surgery impacts on mortality after colonic...

  9. [Osirix: free and open-source software for medical imagery].

    Science.gov (United States)

    Jalbert, F; Paoli, J R

    2008-02-01

    Osirix is a tool for diagnostic imagery, teaching and research tasks, which presents many possible applications in maxillofacial and oral surgery. It is a free and open-source software developed on Mac OS X (Apple) by Dr Antoine Rosset and Dr Osman Ratib, in the department of radiology and medical computing of Geneva (Switzerland).

  10. Open source MySQL Browser for Open Innovation

    Directory of Open Access Journals (Sweden)

    Radu Bucea-Manea-Tonis

    2014-07-01

    Full Text Available Abstract. Our purpose is to cross-compile MySQL driver source code for Linux on Windows architecture using a tool chain in order to build a neutral valid graphic interface on 32 bits. Once achieving this goal we could say that every possible Open source application can be built and run on Windows with maximum efficiency concerning costs and resource. This browser is an example of open innovation because its source code is free for anybody willing to develop new software apps for business and uses only Open source tools.

  11. Phenomena of Open Source and Slovenia's Adaption

    Directory of Open Access Journals (Sweden)

    Matej Mertik

    2011-06-01

    Full Text Available Although free open source libre (FLOSS software is increasing its presence in the media and in debates between IT professionals, and although even citizens in general are starting to talk about it, FLOSS is still in general quite an unknown quantity. But this is changing. There is more and more interest in open source software by general users and also its influence on the public and business sector is undeniable. What is open source? Where did it all start? How is Slovenia using open source? What have we learned? Where are the opportunities for FLOSS? These are the sort of questions we will try to answer in this document. Slovenia implemented some of the important steps in introducing open source, however we are still far behind in terms of open source adoption and great opportunities exist for its better use in future.

  12. Open source innovation phenomenon, participant behaviour, impact

    CERN Document Server

    Herstatt, Cornelius

    2015-01-01

    Open Source Innovation (OSI) has gained considerable momentum within the last years. Academic and management practice interest grows as more and more end-users consider and even participate in Open Source product development like Linux, Android, or Wikipedia. Open Source Innovation: Phenomenon, Participant Behaviour, Impact brings together rigorous academic research and business importance in scrutinizing OCI from three perspectives: The Phenomenon, Participants' Behavior, and Business Implications. The first section introduces OCI artefacts, including who is participating and why, and provide

  13. Free for All: Open Source Software

    Science.gov (United States)

    Schneider, Karen

    2008-01-01

    Open source software has become a catchword in libraryland. Yet many remain unclear about open source's benefits--or even what it is. So what is open source software (OSS)? It's software that is free in every sense of the word: free to download, free to use, and free to view or modify. Most OSS is distributed on the Web and one doesn't need to…

  14. Free for All: Open Source Software

    Science.gov (United States)

    Schneider, Karen

    2008-01-01

    Open source software has become a catchword in libraryland. Yet many remain unclear about open source's benefits--or even what it is. So what is open source software (OSS)? It's software that is free in every sense of the word: free to download, free to use, and free to view or modify. Most OSS is distributed on the Web and one doesn't need to…

  15. Deep Learning in Open Source Learning Streams

    DEFF Research Database (Denmark)

    Kjærgaard, Thomas

    2016-01-01

    and contrasted to the notion of functionalistic learning in a digital context. The mechanism that enables deep learning in this context is ‘The Open Source Learning Stream’. ‘The Open Source Learning Stream’ is the notion of sharing ‘learning instances’ in a digital space (discussion board, Facebook group......, unistructural, multistructural or relational learning. The research concludes that ‘The Open Source Learning Stream’ can catalyze deep learning and that there are four types of ‘Open Source Learning streams’; individual/ asynchronous, individual/synchronous, shared/asynchronous and shared...

  16. Open-source hardware for medical devices.

    Science.gov (United States)

    Niezen, Gerrit; Eslambolchilar, Parisa; Thimbleby, Harold

    2016-04-01

    Open-source hardware is hardware whose design is made publicly available so anyone can study, modify, distribute, make and sell the design or the hardware based on that design. Some open-source hardware projects can potentially be used as active medical devices. The open-source approach offers a unique combination of advantages, including reducing costs and faster innovation. This article compares 10 of open-source healthcare projects in terms of how easy it is to obtain the required components and build the device.

  17. Free software and open source databases

    Directory of Open Access Journals (Sweden)

    Napoleon Alexandru SIRITEANU

    2006-01-01

    Full Text Available The emergence of free/open source software -FS/OSS- enterprises seeks to push software development out of the academic stream into the commercial mainstream, and as a result, end-user applications such as open source database management systems (PostgreSQL, MySQL, Firebird are becoming more popular. Companies like Sybase, Oracle, Sun, IBM are increasingly implementing open source strategies and porting programs/applications into the Linux environment. Open source software is redefining the software industry in general and database development in particular.

  18. Open Source Data Warehousing and Business Intelligence

    CERN Document Server

    Bulusu, Lakshman

    2012-01-01

    Open Source Data Warehousing and Business Intelligence is an all-in-one reference for developing open source based data warehousing (DW) and business intelligence (BI) solutions that are business-centric, cross-customer viable, cross-functional, cross-technology based, and enterprise-wide. Considering the entire lifecycle of an open source DW & BI implementation, its comprehensive coverage spans from basic concepts all the way through to customization. Highlighting the key differences between open source and vendor DW and BI technologies, the book identifies end-to-end solutions that are scala

  19. Open Genetic Code: on open source in the life sciences.

    Science.gov (United States)

    Deibel, Eric

    2014-01-01

    The introduction of open source in the life sciences is increasingly being suggested as an alternative to patenting. This is an alternative, however, that takes its shape at the intersection of the life sciences and informatics. Numerous examples can be identified wherein open source in the life sciences refers to access, sharing and collaboration as informatic practices. This includes open source as an experimental model and as a more sophisticated approach of genetic engineering. The first section discusses the greater flexibly in regard of patenting and the relationship to the introduction of open source in the life sciences. The main argument is that the ownership of knowledge in the life sciences should be reconsidered in the context of the centrality of DNA in informatic formats. This is illustrated by discussing a range of examples of open source models. The second part focuses on open source in synthetic biology as exemplary for the re-materialization of information into food, energy, medicine and so forth. The paper ends by raising the question whether another kind of alternative might be possible: one that looks at open source as a model for an alternative to the commodification of life that is understood as an attempt to comprehensively remove the restrictions from the usage of DNA in any of its formats.

  20. OpenADR Open Source Toolkit: Developing Open Source Software for the Smart Grid

    Energy Technology Data Exchange (ETDEWEB)

    McParland, Charles

    2011-02-01

    Demand response (DR) is becoming an increasingly important part of power grid planning and operation. The advent of the Smart Grid, which mandates its use, further motivates selection and development of suitable software protocols to enable DR functionality. The OpenADR protocol has been developed and is being standardized to serve this goal. We believe that the development of a distributable, open source implementation of OpenADR will benefit this effort and motivate critical evaluation of its capabilities, by the wider community, for providing wide-scale DR services

  1. A STUDY OF CONVERSIONS OF LAPAROSOCOPIC SURGERIES INTO OPEN SURGERIES: A ANALYTICAL STUDY

    Directory of Open Access Journals (Sweden)

    Venkata Reddy

    2015-12-01

    Full Text Available INTRODUCTION: The aim of present study is to know the Conversions in Laparoscopic surgery to Open surgery in The patients of all the surgical units in the Department of General Surgery, Government General Hospital, Rangaraya Medical College, Kakinada over a period of 2 years from July 2013 to July 2015. The Objectives of present study is to compare the Conversion Rates of Laparoscopic Surgery to Open Surgery and the factors causing Conversion to Open Surgery in our institution. PATIENTS AND METHODS The protocol is approved by institution ethics committee and written informed consent was taken from each patient. Present clinical Study is an Analytical study conducted over period of 2 years from July 2013 to July 2015 in the Department of General Surgery, Government General Hospital, Rangaraya Medical College, Kakinada, Andhra Pradesh. RESULTS Total number of 536 laparoscopic surgeries were attempted in elective operation theatres with 21 cases out of 536 cases were converted from laparoscopy to open surgery. Total conversion rate in present study is 4%. Most of conversions occurred in laparoscopic chelecystectomy 5.73% cases in comparison to laparoscopic appendectomy 2.26% and laparoscopic hernia repair with 0%. CONCLUSIONS Over all conversion rates of laparoscopic procedure into open surgery is low when compared to other international studies. Most common causes of conversion in present study is altered anatomy, adhesions and intra operative bleed. Conversion of laparoscopic surgery into open surgery resulted in decreased morbidity, complications and increase in duration of hospital stay

  2. Intrusion Detection using Open Source Tools

    Directory of Open Access Journals (Sweden)

    Jack TIMOFTE

    2008-01-01

    Full Text Available We have witnessed in the recent years that open source tools have gained popularity among all types of users, from individuals or small businesses to large organizations and enterprises. In this paper we will present three open source IDS tools: OSSEC, Prelude and SNORT.

  3. Usability in open source software development

    DEFF Research Database (Denmark)

    Andreasen, M. S.; Nielsen, H. V.; Schrøder, S. O.

    2006-01-01

    Open Source Software (OSS) development has gained significant importance in the production of soft-ware products. Open Source Software developers have produced systems with a functionality that is competitive with similar proprietary software developed by commercial software organizations. Yet OSS...

  4. 7 Questions to Ask Open Source Vendors

    Science.gov (United States)

    Raths, David

    2012-01-01

    With their budgets under increasing pressure, many campus IT directors are considering open source projects for the first time. On the face of it, the savings can be significant. Commercial emergency-planning software can cost upward of six figures, for example, whereas the open source Kuali Ready might run as little as $15,000 per year when…

  5. Scalable Open Source Smart Grid Simulator (SGSim)

    DEFF Research Database (Denmark)

    Ebeid, Emad Samuel Malki; Jacobsen, Rune Hylsberg; Quaglia, Davide

    2017-01-01

    . This paper presents an open source smart grid simulator (SGSim). The simulator is based on open source SystemC Network Simulation Library (SCNSL) and aims to model scalable smart grid applications. SGSim has been tested under different smart grid scenarios that contain hundreds of thousands of households...

  6. Open source and open standards in e-learning research

    NARCIS (Netherlands)

    Koper, Rob

    2007-01-01

    Presentation at the TENCompetence Winterschool directed at Ph.D. students to position e-learning research and the role of open source and open standards to facilitate the research process in a methodological sense. The presentation is based on the paper: http://hdl.handle.net/1820/780

  7. Open source and open standards in e-learning research

    NARCIS (Netherlands)

    Koper, Rob

    2007-01-01

    Presentation at the TENCompetence Winterschool directed at Ph.D. students to position e-learning research and the role of open source and open standards to facilitate the research process in a methodological sense. The presentation is based on the paper: http://hdl.handle.net/1820/780

  8. "Open-Sourcing" Personal Learning

    Science.gov (United States)

    Fiedler, Sebastian H.D.

    2014-01-01

    This article offers a critical reflection on the contemporary Open Educational Resource (OER) movement, its unquestioned investment in a collective "content fetish" and an educational "problem description" that focuses on issues of scarcity, access, and availability of quality materials. It also argues that OER proponents fail…

  9. Inflammatory response in laparoscopic vs. open surgery for gastric cancer

    DEFF Research Database (Denmark)

    Okholm, Cecilie; Goetze, Jens Peter; Svendsen, Lars Bo

    2014-01-01

    lead to an increased susceptibility to complications and morbidity. The aim of this review was to investigate if laparoscopic surgery reduces the immunological response compared to open surgery in gastric cancer. METHODS: We conducted a literature search identifying relevant studies comparing......OBJECTIVE: Laparoscopic surgery may offer advantages compared to open surgery, such as earlier mobilization, less pain and lower post-surgical morbidity. Surgical stress is thought to be associated with the postoperative immunological changes in the body as an impaired immune function, which may...... laparoscopy or laparoscopic-assisted surgery with open gastric surgery. The main outcome was postoperative immunological status defined as surgical stress parameters, including inflammatory cytokines and blood parameters. RESULTS: We identified seven studies that addressed the immunological status in patients...

  10. Open Source And New Media Artists

    Directory of Open Access Journals (Sweden)

    Katri Halonen

    2007-01-01

    Full Text Available This paper deals with the open source method practiced within the new media art context. I present a case study on an international festival, PixelACHE 2005, which was organized by and for new media artists and served as a platform for demonstrations of new media projects and as a meeting place for experimental new media artists. In this article I discuss how new media artists adapted the open source ideology. Open source is seen both as a more liberal method of distribution and as an open joint creative process. I was particularly interested in what kind of motives the new media artists had for taking part in the PixelACHE festival and the joint artistic creative process. In my analysis, I found four different groups that have diverse motives for participating in open source art projects. One group contains the key persons who use the open source network as an important reference in their professional image. Members of the second and third group are new media artists who earn their main income in either the public or corporate sector and use open source projects as a learning platform. The fourth group comprises young enthusiasts who are seeking jobs and professional networking opportunities in the open source network.

  11. The Efficient Utilization of Open Source Information

    Energy Technology Data Exchange (ETDEWEB)

    Baty, Samuel R. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Intelligence and Systems Analysis

    2016-08-11

    These are a set of slides on the efficient utilization of open source information. Open source information consists of a vast set of information from a variety of sources. Not only does the quantity of open source information pose a problem, the quality of such information can hinder efforts. To show this, two case studies are mentioned: Iran and North Korea, in order to see how open source information can be utilized. The huge breadth and depth of open source information can complicate an analysis, especially because open information has no guarantee of accuracy. Open source information can provide key insights either directly or indirectly: looking at supporting factors (flow of scientists, products and waste from mines, government budgets, etc.); direct factors (statements, tests, deployments). Fundamentally, it is the independent verification of information that allows for a more complete picture to be formed. Overlapping sources allow for more precise bounds on times, weights, temperatures, yields or other issues of interest in order to determine capability. Ultimately, a "good" answer almost never comes from an individual, but rather requires the utilization of a wide range of skill sets held by a team of people.

  12. 'Open-sourcing' personal learning

    OpenAIRE

    Fiedler, Sebastian H. D.

    2014-01-01

    This article offers a critical reflection on the contemporary Open Educational Resource (OER) movement, its unquestioned investment in a collective 'content fetish' and an educational 'problem description' that focuses on issues of scarcity, access, and availability of quality materials. It also argues that OER proponents fail to take notice of historically new forms of learning activity emerging within the unfolding digital transformation of our global society. The article reviews some descr...

  13. Weather forecasting with open source software

    Science.gov (United States)

    Rautenhaus, Marc; Dörnbrack, Andreas

    2013-04-01

    To forecast the weather situation during aircraft-based atmospheric field campaigns, we employ a tool chain of existing and self-developed open source software tools and open standards. Of particular value are the Python programming language with its extension libraries NumPy, SciPy, PyQt4, Matplotlib and the basemap toolkit, the NetCDF standard with the Climate and Forecast (CF) Metadata conventions, and the Open Geospatial Consortium Web Map Service standard. These open source libraries and open standards helped to implement the "Mission Support System", a Web Map Service based tool to support weather forecasting and flight planning during field campaigns. The tool has been implemented in Python and has also been released as open source (Rautenhaus et al., Geosci. Model Dev., 5, 55-71, 2012). In this presentation we discuss the usage of free and open source software for weather forecasting in the context of research flight planning, and highlight how the field campaign work benefits from using open source tools and open standards.

  14. An 'open source' networked identity

    DEFF Research Database (Denmark)

    Larsen, Malene Charlotte

    2016-01-01

    friendship, but also an important part of their self-presentation online. It examines why these emotional statements are almost always publicly available – or even strategically and intentionally placed on the young people’s profiles. In relation to this, it is argued that young people – through...... their emotional communicative actions – are not only staging their own identity, but are co-constructors of each other’s identities, which the author characterises as an “open source”, networked identity....

  15. Lessons from an Open Source Business

    Directory of Open Access Journals (Sweden)

    Fred Dixon

    2011-04-01

    Full Text Available Creating a successful company is difficult; but creating a successful company, a successful open source project, and a successful ecosystem all at the same time is much more difficult. This article takes a retrospective look at some of the lessons we have learned in building BigBlueButton, an open source web conferencing system for distance education, and in building Blindside Networks, a company following the traditional business model of providing support and services to paying customers. Our main message is that the focus must be on creating a successful open source project first, for without it, no company in the ecosystem can flourish.

  16. Freeing Worldview's development process: Open source everything!

    Science.gov (United States)

    Gunnoe, T.

    2016-12-01

    Freeing your code and your project are important steps for creating an inviting environment for collaboration, with the added side effect of keeping a good relationship with your users. NASA Worldview's codebase was released with the open source NOSA (NASA Open Source Agreement) license in 2014, but this is only the first step. We also have to free our ideas, empower our users by involving them in the development process, and open channels that lead to the creation of a community project. There are many highly successful examples of Free and Open Source Software (FOSS) projects of which we can take note: the Linux kernel, Debian, GNOME, etc. These projects owe much of their success to having a passionate mix of developers/users with a great community and a common goal in mind. This presentation will describe the scope of this openness and how Worldview plans to move forward with a more community-inclusive approach.

  17. Retained needles in laparoscopic surgery: open or observe?

    National Research Council Canada - National Science Library

    Ruscher, Kimberly A; Modeste, Kevin A; Staff, Ilene; Papasavas, Pavlos K; Tishler, Darren S

    2014-01-01

    ...) during laparoscopic surgery. A survey presented a relevant case and 18 multiple-choice and open-response questions about personal experience with and attitudes toward RFBs, clinical practices, and management...

  18. Outcome of patients undergoing open heart surgery at the Uganda ...

    African Journals Online (AJOL)

    Training of the superspecialties abroad is largely limited to observation with little or no opportunity ... Results: A total of 124 patients underwent open heart surgery during the study period. ..... The experience at the Uganda heart institute shows.

  19. On the Ambiguity of Commercial Open Source

    Directory of Open Access Journals (Sweden)

    Lucian Luca

    2006-01-01

    Full Text Available . Open source and commercial applications used to be two separate worlds. The former was the work of amateurs who had little interest in making a profit, while the latter was only profit oriented and was produced by big companies. Nowadays open source is a threat and an opportunity to serious businesses of all kinds, generating good profits while delivering low costs products to customers. The competition between commercial and open source software has impacted the industry and the society as a whole. But in the last years, the markets for commercial and open source software are converging rapidly and it is interesting to resume and discuss the implications of this new paradigm, taking into account arguments pro and against it.

  20. Deep Learning in Open Source Learning Streams

    DEFF Research Database (Denmark)

    Kjærgaard, Thomas

    2016-01-01

    This chapter presents research on deep learning in a digital learning environment and raises the question if digital instructional designs can catalyze deeper learning than traditional classroom teaching. As a theoretical point of departure the notion of ‘situated learning’ is utilized...... and contrasted to the notion of functionalistic learning in a digital context. The mechanism that enables deep learning in this context is ‘The Open Source Learning Stream’. ‘The Open Source Learning Stream’ is the notion of sharing ‘learning instances’ in a digital space (discussion board, Facebook group......, unistructural, multistructural or relational learning. The research concludes that ‘The Open Source Learning Stream’ can catalyze deep learning and that there are four types of ‘Open Source Learning streams’; individual/ asynchronous, individual/synchronous, shared/asynchronous and shared...

  1. On Open- source Multi-robot simulators

    CSIR Research Space (South Africa)

    Namoshe, M

    2008-07-01

    Full Text Available Open source software simulators play a major role in robotics design and research as platforms for developing, testing and improving architectures, concepts and algorithms for cooperative/multi-robot systems. Simulation environment enables control...

  2. The Spaces of Open-Source Politics

    DEFF Research Database (Denmark)

    Husted, Emil; Plesner, Ursula

    constructed by the Alternative as techniques for practicing open-source politics, and observe that physical and digital spaces create a vacillation between openness and closure. This vacillation produces a dialectic relationship between practices of imagination and affirmation. Curiously, it seems...

  3. DKIE: Open Source Information Extraction for Danish

    DEFF Research Database (Denmark)

    Derczynski, Leon; Field, Camilla Vilhelmsen; Bøgh, Kenneth Sejdenfaden

    2014-01-01

    Danish is a major Scandinavian language spoken daily by around six million people. However, it lacks a unified, open set of NLP tools. This demonstration will introduce DKIE, an extensible open-source toolkit for processing Danish text. We implement an information extraction architecture for Danish...

  4. DKIE: Open Source Information Extraction for Danish

    DEFF Research Database (Denmark)

    Derczynski, Leon; Field, Camilla Vilhelmsen; Bøgh, Kenneth Sejdenfaden

    2014-01-01

    Danish is a major Scandinavian language spoken daily by around six million people. However, it lacks a unified, open set of NLP tools. This demonstration will introduce DKIE, an extensible open-source toolkit for processing Danish text. We implement an information extraction architecture for Danish...... independently or with the Stanford NLP toolkit....

  5. Open Source Interoperability: It's More than Technology

    Directory of Open Access Journals (Sweden)

    Dominic Sartorio

    2008-01-01

    Full Text Available The Open Solutions Alliance is a consortium of leading commercial open source vendors, integrators and end users dedicated to the growth of open source based solutions in the enterprise. We believe Linux and other infrastructure software, such as Apache, has become mainstream, and packaged solutions represent the next great growth opportunity. However some unique challenges can temper that opportunity. These challenges include getting the word out about the maturity and enterprise-readiness of those solutions, ensuring interoperability both with each other and with other proprietary and legacy solutions, and ensuring healthy collaboration between vendors and their respective customer and developer communities.

  6. History of power sources in endoscopic surgery.

    Science.gov (United States)

    Sutton, Christopher; Abbott, Jason

    2013-01-01

    The history of energy sources used in surgery is inextricably linked to the history of electricity. Milestones include identification of safe electrical waveforms that can be used in the human body, patient isolation to prevent alternate-site burns, bipolar energy sources to negate capacitance injuries, laser energy, and the combination vessel sealing devices commonly used today. Engineering efforts to eliminate many of the hazards of electrosurgery are critical to how we practice modern gynecologic surgery. The introduction of bipolar instruments, increasing the safety of monopolar electrosurgery by not using hybrid trocars, and introduction of active shielding of the instruments from stray radiofrequency energy using intelligent secondary conductors have led to the re-emergence of electrosurgery as the universal surgical energy source. The low ongoing costs and the presence of electrosurgical generators in all hospitals readily enables electrosurgery to be the mainstay. Expensive lasers are confined to specialized centers, where they continue to be used, but for a long while filled a gap created by complications of electrosurgery. Sophisticated power sources continue to be introduced and include the ultrasonic scalpel, plasma surgery, and various devices for sealing vessels, all of which have advantages and disadvantages that are recognized as they begin to be subjected to scientific validation in randomized trials. Copyright © 2013 AAGL. Published by Elsevier Inc. All rights reserved.

  7. Making a Business out of Open Source

    CERN Document Server

    CERN. Geneva

    2007-01-01

    Marc Fleury, a physicist by training, retired in his thirties after selling the company JBoss, which made an open-source application server, to Red Hat. He will talk about the various business models of open source software. From leveraging available open source software and casual contributions, to on-ramp models and subscription models, various business models have been explored and function. Not all models work for all software fields and business types. He will review those business models in context and survey "state-of-the-art" economic models for open source software production. Speaker Bio: Marc Fleury is the creator of JBoss, an open-source Java application server. Fleury holds a degree in mathematics and a Doctorate in physics from the École Polytechnique in Paris and a Master in Theoretical Physics from the École Normale. He worked in France for Sun Microsystems before moving to the United States where he has worked on various Java projects. Fleury's research interest focused on middleware, a...

  8. Incisional hernias after open versus laparoscopic surgery for colonic cancer

    DEFF Research Database (Denmark)

    Jensen, Kristian K.; Krarup, Peter-Martin; Scheike, Thomas;

    2016-01-01

    BACKGROUND: Laparoscopic surgery for colonic cancer decreases the incidence of postoperative complications and length of hospital stay as compared with open surgery, while the oncologic outcome remains equivalent. It is unknown whether the surgical approach impacts on the long-term rate of incisi......BACKGROUND: Laparoscopic surgery for colonic cancer decreases the incidence of postoperative complications and length of hospital stay as compared with open surgery, while the oncologic outcome remains equivalent. It is unknown whether the surgical approach impacts on the long-term rate...... of incisional hernia. Furthermore, risk factors for incisional hernia formation are not fully elucidated. The aim of this study was to evaluate the long-term effect of elective open versus laparoscopic surgery for colonic cancer on development of incisional hernia. METHODS: This nationwide cohort study included...... were performed. RESULTS: A total of 8489 patients were included, with a median follow-up of 8.8 (interquartile range 7.0-10.7) years. The incidence of incisional hernia was increased among patients operated on with open techniques compared with patients undergoing laparoscopic surgery (7.3 vs. 5.2 %, p...

  9. Comparison of endoscopic surgery and open surgery for gluteal muscle contracture.

    Science.gov (United States)

    Fu, Dehao; Yang, Shuhua; Xiao, Baojun; Wang, Hong; Meng, Chunqing

    2011-01-01

    To compare the clinical effects of endoscopic surgeries with traditional open surgeries in the treatment of gluteal muscle contracture and discuss their indications and value. In this retrospective study, 50 patients received traditional open surgeries and 52 received endoscopic surgeries. The 2 groups were compared in terms of surgery duration, incision lengths, postsurgical pain, complications, off-bed activity times, hospitalization duration, clinical outcome, and 1-year recurrence rates. The endoscopic surgery group was significantly superior to the open surgery group in regard to incision length, postsurgical pain, off-bed activity time, hospitalization duration, and patient cosmetic satisfaction. Differences were not statistically significant for the surgery duration, complications, clinical outcome, or the 1-year recurrence rate. All the endoscopic surgery group patients stated that they would choose endoscopic surgery again. The endoscopic release of gluteal muscle contracture is safe and reliable, with the advantages of less trauma and pain, shorter operative time, earlier rehabilitation, and return of functional activities. Its application, though, should be carefully controlled based on the indications. It is applicable to degree I and II patients, but may be used only very cautiously in degree III patients. Level III.

  10. Open source intelligence, open social intelligence and privacy by design

    OpenAIRE

    Casanovas, Pompeu; Royal Melbourne Institute of Technology (Austràlia). Centre for Applied Social Research

    2014-01-01

    Ponència presentada a European Conference on Social Intelligence (ECSI-2014) OSINT stands for Open Source Intelligence, (O)SI for (Open) Social Intelligence, PbD for Privacy by Design. The CAPER project has built an OSINT solution oriented to the prevention of organized crime. How to balance freedom and security? This position paper describes a way to embed the legal and ethical issues raised by the General Data Reform Package (GDRP) in Europe into this kind of surveillance platforms. It f...

  11. Pioneering SESAME light source officially opened

    CERN Multimedia

    Caraban Gonzalez, Noemi

    2017-01-01

    Allan, Jordan, 16 May 2017. The SESAME light source was today officially opened by His Majesty King Abdullah II. An intergovernmental organization, SESAME is the first regional laboratory for the Middle East and neighbouring regions The laboratory’s official opening ushers in a new era of research covering fields ranging from medicine and biology, through materials science, physics and chemistry to healthcare, the environment, agriculture and archaeology.

  12. Developing a Successful Open Source Training Model

    Directory of Open Access Journals (Sweden)

    Belinda Lopez

    2010-01-01

    Full Text Available Training programs for open source software provide a tangible, and sellable, product. A successful training program not only builds revenue, it also adds to the overall body of knowledge available for the open source project. By gathering best practices and taking advantage of the collective expertise within a community, it may be possible for a business to partner with an open source project to build a curriculum that promotes the project and supports the needs of the company's training customers. This article describes the initial approach used by Canonical, the commercial sponsor of the Ubuntu Linux operating system, to engage the community in the creation of its training offerings. We then discuss alternate curriculum creation models and some of the conditions that are necessary for successful collaboration between creators of existing documentation and commercial training providers.

  13. Free and Open Source Software for Development

    CERN Document Server

    van Reijswoud, Victor

    2008-01-01

    Development organizations and International Non-Governmental Organizations have been emphasizing the high potential of Free and Open Source Software for the Less Developed Countries. Cost reduction, less vendor dependency and increased potential for local capacity development have been their main arguments. In spite of its advantages, Free and Open Source Software is not widely adopted at the African continent. In this book the authors will explore the grounds on with these expectations are based. Where do they come from and is there evidence to support these expectations? Over the past years several projects have been initiated and some good results have been achieved, but at the same time many challenges were encountered. What lessons can be drawn from these experiences and do these experiences contain enough evidence to support the high expectations? Several projects and their achievements will be considered. In the final part of the book the future of Free and Open Source Software for Development will be ...

  14. Open Source Approach to Project Management Tools

    Directory of Open Access Journals (Sweden)

    Romeo MARGEA

    2011-01-01

    Full Text Available Managing large projects involving different groups of people and complex tasks can be challenging. The solution is to use Project management software, which allows a more efficient management of projects. However, famous project management systems can be costly and may require expensive custom servers. Even if free software is not as complex as Microsoft Project, is noteworthy to think that not all projects need all the features, amenities and power of such systems. There are free and open source software alternatives that meet the needs of most projects, and that allow Web access based on different platforms and locations. A starting stage in adopting an OSS in-house is finding and identifying existing open source solution. In this paper we present an overview of Open Source Project Management Software (OSPMS based on articles, reviews, books and developers’ web sites, about those that seem to be the most popular software in this category.

  15. Cost Optimization Through Open Source Software

    Directory of Open Access Journals (Sweden)

    Mark VonFange

    2010-12-01

    Full Text Available The cost of information technology (IT as a percentage of overall operating and capital expenditures is growing as companies modernize their operations and as IT becomes an increasingly indispensable part of company resources. The price tag associated with IT infrastructure is a heavy one, and, in today's economy, companies need to look for ways to reduce overhead while maintaining quality operations and staying current with technology. With its advancements in availability, usability, functionality, choice, and power, free/libre open source software (F/LOSS provides a cost-effective means for the modern enterprise to streamline its operations. iXsystems wanted to quantify the benefits associated with the use of open source software at their company headquarters. This article is the outgrowth of our internal analysis of using open source software instead of commercial software in all aspects of company operations.

  16. Open Source in Canada's Public Sector

    Directory of Open Access Journals (Sweden)

    Evan Leibovitch

    2008-03-01

    Full Text Available The story of the growth of open source use in Canada has been far more a matter of evolution than revolution, so quiet in its pace that its progress has been difficult to measure. This has posed many challenges to Canadian open source advocates in their efforts to ensure that their country does not lag behind the rest of the world in understanding the social and business benefits open source provides. Perhaps some of the leading soldiers in the trenches might be our civil servants who protect the public purse. In addition to managing and minimizing the costs of delivering necessary services, public sector projects should also advance the social good through the delicate balance of transparency and efficiency.

  17. Open source bioimage informatics for cell biology.

    Science.gov (United States)

    Swedlow, Jason R; Eliceiri, Kevin W

    2009-11-01

    Significant technical advances in imaging, molecular biology and genomics have fueled a revolution in cell biology, in that the molecular and structural processes of the cell are now visualized and measured routinely. Driving much of this recent development has been the advent of computational tools for the acquisition, visualization, analysis and dissemination of these datasets. These tools collectively make up a new subfield of computational biology called bioimage informatics, which is facilitated by open source approaches. We discuss why open source tools for image informatics in cell biology are needed, some of the key general attributes of what make an open source imaging application successful, and point to opportunities for further operability that should greatly accelerate future cell biology discovery.

  18. Web accessibility and open source software.

    Science.gov (United States)

    Obrenović, Zeljko

    2009-07-01

    A Web browser provides a uniform user interface to different types of information. Making this interface universally accessible and more interactive is a long-term goal still far from being achieved. Universally accessible browsers require novel interaction modalities and additional functionalities, for which existing browsers tend to provide only partial solutions. Although functionality for Web accessibility can be found as open source and free software components, their reuse and integration is complex because they were developed in diverse implementation environments, following standards and conventions incompatible with the Web. To address these problems, we have started several activities that aim at exploiting the potential of open-source software for Web accessibility. The first of these activities is the development of Adaptable Multi-Interface COmmunicator (AMICO):WEB, an infrastructure that facilitates efficient reuse and integration of open source software components into the Web environment. The main contribution of AMICO:WEB is in enabling the syntactic and semantic interoperability between Web extension mechanisms and a variety of integration mechanisms used by open source and free software components. Its design is based on our experiences in solving practical problems where we have used open source components to improve accessibility of rich media Web applications. The second of our activities involves improving education, where we have used our platform to teach students how to build advanced accessibility solutions from diverse open-source software. We are also partially involved in the recently started Eclipse projects called Accessibility Tools Framework (ACTF), the aim of which is development of extensible infrastructure, upon which developers can build a variety of utilities that help to evaluate and enhance the accessibility of applications and content for people with disabilities. In this article we briefly report on these activities.

  19. Open Data, Open Source and Open Standards in chemistry: The Blue Obelisk five years on

    Directory of Open Access Journals (Sweden)

    O'Boyle Noel M

    2011-10-01

    Full Text Available Abstract Background The Blue Obelisk movement was established in 2005 as a response to the lack of Open Data, Open Standards and Open Source (ODOSOS in chemistry. It aims to make it easier to carry out chemistry research by promoting interoperability between chemistry software, encouraging cooperation between Open Source developers, and developing community resources and Open Standards. Results This contribution looks back on the work carried out by the Blue Obelisk in the past 5 years and surveys progress and remaining challenges in the areas of Open Data, Open Standards, and Open Source in chemistry. Conclusions We show that the Blue Obelisk has been very successful in bringing together researchers and developers with common interests in ODOSOS, leading to development of many useful resources freely available to the chemistry community.

  20. Open Data, Open Source and Open Standards in chemistry: The Blue Obelisk five years on

    Science.gov (United States)

    2011-01-01

    Background The Blue Obelisk movement was established in 2005 as a response to the lack of Open Data, Open Standards and Open Source (ODOSOS) in chemistry. It aims to make it easier to carry out chemistry research by promoting interoperability between chemistry software, encouraging cooperation between Open Source developers, and developing community resources and Open Standards. Results This contribution looks back on the work carried out by the Blue Obelisk in the past 5 years and surveys progress and remaining challenges in the areas of Open Data, Open Standards, and Open Source in chemistry. Conclusions We show that the Blue Obelisk has been very successful in bringing together researchers and developers with common interests in ODOSOS, leading to development of many useful resources freely available to the chemistry community. PMID:21999342

  1. DEIMOS – an Open Source Image Database

    Directory of Open Access Journals (Sweden)

    M. Blazek

    2011-12-01

    Full Text Available The DEIMOS (DatabasE of Images: Open Source is created as an open-source database of images and videos for testing, verification and comparing of various image and/or video processing techniques such as enhancing, compression and reconstruction. The main advantage of DEIMOS is its orientation to various application fields – multimedia, television, security, assistive technology, biomedicine, astronomy etc. The DEIMOS is/will be created gradually step-by-step based upon the contributions of team members. The paper is describing basic parameters of DEIMOS database including application examples.

  2. Open Source, Open Standards, and Health Care Information Systems

    Science.gov (United States)

    2011-01-01

    Recognition of the improvements in patient safety, quality of patient care, and efficiency that health care information systems have the potential to bring has led to significant investment. Globally the sale of health care information systems now represents a multibillion dollar industry. As policy makers, health care professionals, and patients, we have a responsibility to maximize the return on this investment. To this end we analyze alternative licensing and software development models, as well as the role of standards. We describe how licensing affects development. We argue for the superiority of open source licensing to promote safer, more effective health care information systems. We claim that open source licensing in health care information systems is essential to rational procurement strategy. PMID:21447469

  3. Open source, open standards, and health care information systems.

    Science.gov (United States)

    Reynolds, Carl J; Wyatt, Jeremy C

    2011-02-17

    Recognition of the improvements in patient safety, quality of patient care, and efficiency that health care information systems have the potential to bring has led to significant investment. Globally the sale of health care information systems now represents a multibillion dollar industry. As policy makers, health care professionals, and patients, we have a responsibility to maximize the return on this investment. To this end we analyze alternative licensing and software development models, as well as the role of standards. We describe how licensing affects development. We argue for the superiority of open source licensing to promote safer, more effective health care information systems. We claim that open source licensing in health care information systems is essential to rational procurement strategy.

  4. The SAMI2 Open Source Project

    Science.gov (United States)

    Huba, J. D.; Joyce, G.

    2001-05-01

    In the past decade, the Open Source Model for software development has gained popularity and has had numerous major achievements: emacs, Linux, the Gimp, and Python, to name a few. The basic idea is to provide the source code of the model or application, a tutorial on its use, and a feedback mechanism with the community so that the model can be tested, improved, and archived. Given the success of the Open Source Model, we believe it may prove valuable in the development of scientific research codes. With this in mind, we are `Open Sourcing' the low to mid-latitude ionospheric model that has recently been developed at the Naval Research Laboratory: SAMI2 (Sami2 is Another Model of the Ionosphere). The model is comprehensive and uses modern numerical techniques. The structure and design of SAMI2 make it relatively easy to understand and modify: the numerical algorithms are simple and direct, and the code is reasonably well-written. Furthermore, SAMI2 is designed to run on personal computers; prohibitive computational resources are not necessary, thereby making the model accessible and usable by virtually all researchers. For these reasons, SAMI2 is an excellent candidate to explore and test the open source modeling paradigm in space physics research. We will discuss various topics associated with this project. Research supported by the Office of Naval Research.

  5. Technique of open laparoscopy for supramesocolic surgery in obese patients.

    Science.gov (United States)

    Deguines, Jean Baptiste; Qassemyar, Quentin; Dhahri, Abdennaceur; Brehant, Olivier; Fuks, David; Verhaeghe, Pierre; Regimbeau, Jean-Marc

    2010-08-01

    Incidence of obesity and related diseases are increasing in the world. Visceral surgeons are more often confronted with laparoscopic surgery in obese patients. Besides validated surgery procedures, such as cholecystectomy and gastroesophageal reflux surgery, bariatric procedures are increasingly performed. In obese patients, the thickness of adipose panicle makes open laparoscopy hazardous. In our department, we use systematically a technique of open laparoscopy in obese patients for supramesocolic surgery, which is safe, reproducible, and permits good closure of the abdominal wall. The surgical technique consists of opening the abdominal wall through the rectus abdominis. Helped by specific retractors called Descottes (Medtronic Laboratory), both fascias are charged by sutures separately. Incision in the fascias is made safely by pooling on sutures. Introduction of port-site is made under view control. At the end of laparoscopy, closure of both fascias is easily done. We present a technique of open laparoscopy in obese patients, systematically used, for supramesocolic surgery. This technique is safe, reproducible, and permits an efficient closure of the abdominal wall.

  6. Web Server Security on Open Source Environments

    Science.gov (United States)

    Gkoutzelis, Dimitrios X.; Sardis, Manolis S.

    Administering critical resources has never been more difficult that it is today. In a changing world of software innovation where major changes occur on a daily basis, it is crucial for the webmasters and server administrators to shield their data against an unknown arsenal of attacks in the hands of their attackers. Up until now this kind of defense was a privilege of the few, out-budgeted and low cost solutions let the defender vulnerable to the uprising of innovating attacking methods. Luckily, the digital revolution of the past decade left its mark, changing the way we face security forever: open source infrastructure today covers all the prerequisites for a secure web environment in a way we could never imagine fifteen years ago. Online security of large corporations, military and government bodies is more and more handled by open source application thus driving the technological trend of the 21st century in adopting open solutions to E-Commerce and privacy issues. This paper describes substantial security precautions in facing privacy and authentication issues in a totally open source web environment. Our goal is to state and face the most known problems in data handling and consequently propose the most appealing techniques to face these challenges through an open solution.

  7. Open source software migration: Best practices

    CSIR Research Space (South Africa)

    Molefe, Onkgopotse M

    2010-09-01

    Full Text Available Open source software (OSS) has gained prominence worldwide, largely due to cost savings and security considerations. This has caused a change in the IT sector and has led to the migration of desktops from proprietary to OSS. The problem...

  8. Crime analysis using open source information

    DEFF Research Database (Denmark)

    Nizamani, Sarwat; Memon, Nasrullah; Shah, Azhar Ali;

    2015-01-01

    In this paper, we present a method of crime analysis from open source information. We employed un-supervised methods of data mining to explore the facts regarding the crimes of an area of interest. The analysis is based on well known clustering and association techniques. The results show...

  9. Of Birkenstocks and Wingtips: Open Source Licenses

    Science.gov (United States)

    Gandel, Paul B.; Wheeler, Brad

    2005-01-01

    The notion of collaborating to create open source applications for higher education is rapidly gaining momentum. From course management systems to ERP financial systems, higher education institutions are working together to explore whether they can in fact build a better mousetrap. As Lois Brooks, of Stanford University, recently observed, the…

  10. An open-source thermodynamic software library

    DEFF Research Database (Denmark)

    Ritschel, Tobias Kasper Skovborg; Gaspar, Jozsef; Capolei, Andrea

    This is a technical report which accompanies the article ”An open-source thermodynamic software library” which describes an efficient Matlab and C implementation for evaluation of thermodynamic properties. In this technical report we present the model equations, that are also presented in the paper...

  11. Communal Resources in Open Source Software Development

    Science.gov (United States)

    Spaeth, Sebastian; Haefliger, Stefan; von Krogh, Georg; Renzl, Birgit

    2008-01-01

    Introduction: Virtual communities play an important role in innovation. The paper focuses on the particular form of collective action in virtual communities underlying as Open Source software development projects. Method: Building on resource mobilization theory and private-collective innovation, we propose a theory of collective action in…

  12. Scribus – Open Source Desktop Publishing

    Directory of Open Access Journals (Sweden)

    Christoph Kaindel

    2010-12-01

    Full Text Available Professionelle Layout-Programme wie Quark XPress oder Adobe InDesign sind unerschwinglich teuer und daher im privaten oder Schulbereich kaum legal verfügbar. Das Open Source Programm Scribus stellt hier eine brauchbare Alternative dar.

  13. CONTENT MANAGEMENT SYSTEMS (CMS OPEN SOURCE WEBSITES

    Directory of Open Access Journals (Sweden)

    Marinela Lăzărică

    2013-01-01

    Full Text Available Firms need flexible software applications, which may be adaptable to dynamic changes of the modern business environment; they also need more control over their software costs, security and trust in purchased and implemented software. Moreover, they need to be free of individual software vendors and license costs for the software, etc. The solution of this problem consisted in open source applications and open source technology has proven that it can often provide high-quality software being a challenge for old models of software development and maintenance. The first content management system was announced in the late 90s. The offer of such software systems is varied and each of them has its own characteristics. This requires a comparative analysis of viable open-source systems in order to choose the most appropriate imposed goals. In this context, the paper illustrates the use of an open source content management system, like WordPress, to develop a content site in design of websites and analyzeits characteristics.

  14. Understanding open source communities: an organizational perspective

    NARCIS (Netherlands)

    Van Wendel de Joode, R.

    2005-01-01

    Open source communities are groups of sometimes hundreds if not thousands of individuals with different interests, backgrounds and motives. Many participants are volunteers, who are not paid to take part in the communities. Furthermore, many never get to meet each other in real life. They meet virtu

  15. Intrinsic Motivation in Open Source Software Development

    DEFF Research Database (Denmark)

    Bitzer, J.; W., Schrettl,; Schröder, Philipp

    2004-01-01

    This papers sheds light on the puzzling evidence that even though open source software (OSS) is a public good, it is developed for free by highly qualified, young and motivated individuals, and evolves at a rapid pace. We show that once OSS development is understood as the private provision...

  16. Crime analysis using open source information

    DEFF Research Database (Denmark)

    Nizamani, Sarwat; Memon, Nasrullah; Shah, Azhar Ali

    2015-01-01

    In this paper, we present a method of crime analysis from open source information. We employed un-supervised methods of data mining to explore the facts regarding the crimes of an area of interest. The analysis is based on well known clustering and association techniques. The results show...

  17. Open-source syringe pump library.

    Science.gov (United States)

    Wijnen, Bas; Hunt, Emily J; Anzalone, Gerald C; Pearce, Joshua M

    2014-01-01

    This article explores a new open-source method for developing and manufacturing high-quality scientific equipment suitable for use in virtually any laboratory. A syringe pump was designed using freely available open-source computer aided design (CAD) software and manufactured using an open-source RepRap 3-D printer and readily available parts. The design, bill of materials and assembly instructions are globally available to anyone wishing to use them. Details are provided covering the use of the CAD software and the RepRap 3-D printer. The use of an open-source Rasberry Pi computer as a wireless control device is also illustrated. Performance of the syringe pump was assessed and the methods used for assessment are detailed. The cost of the entire system, including the controller and web-based control interface, is on the order of 5% or less than one would expect to pay for a commercial syringe pump having similar performance. The design should suit the needs of a given research activity requiring a syringe pump including carefully controlled dosing of reagents, pharmaceuticals, and delivery of viscous 3-D printer media among other applications.

  18. Open-source syringe pump library.

    Directory of Open Access Journals (Sweden)

    Bas Wijnen

    Full Text Available This article explores a new open-source method for developing and manufacturing high-quality scientific equipment suitable for use in virtually any laboratory. A syringe pump was designed using freely available open-source computer aided design (CAD software and manufactured using an open-source RepRap 3-D printer and readily available parts. The design, bill of materials and assembly instructions are globally available to anyone wishing to use them. Details are provided covering the use of the CAD software and the RepRap 3-D printer. The use of an open-source Rasberry Pi computer as a wireless control device is also illustrated. Performance of the syringe pump was assessed and the methods used for assessment are detailed. The cost of the entire system, including the controller and web-based control interface, is on the order of 5% or less than one would expect to pay for a commercial syringe pump having similar performance. The design should suit the needs of a given research activity requiring a syringe pump including carefully controlled dosing of reagents, pharmaceuticals, and delivery of viscous 3-D printer media among other applications.

  19. Open source OCR framework using mobile devices

    Science.gov (United States)

    Zhou, Steven Zhiying; Gilani, Syed Omer; Winkler, Stefan

    2008-02-01

    Mobile phones have evolved from passive one-to-one communication device to powerful handheld computing device. Today most new mobile phones are capable of capturing images, recording video, and browsing internet and do much more. Exciting new social applications are emerging on mobile landscape, like, business card readers, sing detectors and translators. These applications help people quickly gather the information in digital format and interpret them without the need of carrying laptops or tablet PCs. However with all these advancements we find very few open source software available for mobile phones. For instance currently there are many open source OCR engines for desktop platform but, to our knowledge, none are available on mobile platform. Keeping this in perspective we propose a complete text detection and recognition system with speech synthesis ability, using existing desktop technology. In this work we developed a complete OCR framework with subsystems from open source desktop community. This includes a popular open source OCR engine named Tesseract for text detection & recognition and Flite speech synthesis module, for adding text-to-speech ability.

  20. System level modelling with open source tools

    DEFF Research Database (Denmark)

    Jakobsen, Mikkel Koefoed; Madsen, Jan; Niaki, Seyed Hosein Attarzadeh;

    , called ForSyDe. ForSyDe is available under the open Source approach, which allows small and medium enterprises (SME) to get easy access to advanced modeling capabilities and tools. We give an introduction to the design methodology through the system level modeling of a simple industrial use case, and we...

  1. Editorial: Humanitarian Open Source (December 2010

    Directory of Open Access Journals (Sweden)

    Leslie Hawthorn

    2010-11-01

    Full Text Available In recent years, our increasingly connected world has provided us with a greater understanding of the needs of our fellow global citizens. The devastating worldwide impact of natural disasters, disease, and poverty has been raised in our collective awareness and our ability to collectively alleviate this suffering has been brought to the fore. While many of us are familiar with donating our funds to better the lives of those less fortunate than ourselves, it is often easy to overlook a core component of facing these global challenges: information technology. The humanitarian open source movement seeks to ameliorate these sufferings through the creation of IT infrastructure to support a wide array of goals for the public good, such as providing effective healthcare or microloans to the poorest of the poor. Achieving these goals requires a sophisticated set of software and hardware tools, all of which work to save and improve lives in some of the most difficult of situations where the availability of electricity, data, IT knowledge, etc. may be low or lacking altogether. It should come as no surprise that the humanitarian open source domain attracts a great deal of attention from software developers, engineers, and others who find that they are able to both solve intense technical challenges while helping to improve the lives of others. However, to support ongoing humanitarian needs, the communities who produce humanitarian free and open source software (HFOSS and hardware have increasingly identified the need for business models to support their efforts. While the lower cost of using open source software and hardware solutions means that more funds can be directed to aid and comfort those in need, the goodwill of developer communities and the funds of grantees alone cannot grow the ecosystem sufficiently to meet ever-growing global needs. To face these challenges - poverty, global health crises, disaster relief, etc. - humanitarian open source

  2. Open Access, Open Source and Digital Libraries: A Current Trend in University Libraries around the World

    Science.gov (United States)

    Krishnamurthy, M.

    2008-01-01

    Purpose: The purpose of this paper is to describe the open access and open source movement in the digital library world. Design/methodology/approach: A review of key developments in the open access and open source movement is provided. Findings: Open source software and open access to research findings are of great use to scholars in developing…

  3. Open Access, Open Source and Digital Libraries: A Current Trend in University Libraries around the World

    Science.gov (United States)

    Krishnamurthy, M.

    2008-01-01

    Purpose: The purpose of this paper is to describe the open access and open source movement in the digital library world. Design/methodology/approach: A review of key developments in the open access and open source movement is provided. Findings: Open source software and open access to research findings are of great use to scholars in developing…

  4. Pulmonary physiotherapy effect on patients undergoing open cardiac surgery

    Directory of Open Access Journals (Sweden)

    Seyed Kazem Shakuri

    2014-09-01

    Full Text Available Backgrounds and Objectives — Respiratory complications after open heart surgeries are common problems which can lead to death if not properly managed. The aim of this study was to evaluate the role of pulmonary rehabilitation before and after surgery for reducing the risk of pulmonary complications after surgery also correlations of the six-minute walk test and respiratory following open heart surgery. Material and Methods — In a randomized clinical trial, 60 patients undergoing heart surgery were divided into two groups randomly (groups A and B. In group A it was performed physiotherapy before and after chest physiotherapy surgery, but on patients in group B were done only chest physiotherapy after surgery. Effects of preoperative pulmonary rehabilitation were compared between two groups, using spirometry and six-minute walk test. Results — Thirty nine of males (65% and 21 females (35% with a mean age of 8.10±9.56 was been analyzed. The mean difference in predicted forced vital capacity (CI95%: 1.3 to 8.7 and predicted peak flow indices (CI95%: 1.9 to 9.4 of spirometery indicator was significant, also evaluation of six-minute walk test showed, mean difference in walking distant (CI95%: 8.8 to 21.0 and mean oxyhemoglobin saturation (CI95%: 0.59 to 1.67 in group A was more than group B. Inverse correlation of heart rate with forced vital capacity showed that patients with more restriction had more heart rate during the walking test. Conclusion — Pulmonary rehabilitation program before surgery is recommended to reduce complications of heart surgery. Further evaluations are necessary in relation to the sensitivity and specificity of six-minute walk test parameters alone in the evaluation of respiratory performance.

  5. Measuring Modularity in Open Source Code Bases

    Directory of Open Access Journals (Sweden)

    Roberto Milev

    2009-03-01

    Full Text Available Modularity of an open source software code base has been associated with growth of the software development community, the incentives for voluntary code contribution, and a reduction in the number of users who take code without contributing back to the community. As a theoretical construct, modularity links OSS to other domains of research, including organization theory, the economics of industry structure, and new product development. However, measuring the modularity of an OSS design has proven difficult, especially for large and complex systems. In this article, we describe some preliminary results of recent research at Carleton University that examines the evolving modularity of large-scale software systems. We describe a measurement method and a new modularity metric for comparing code bases of different size, introduce an open source toolkit that implements this method and metric, and provide an analysis of the evolution of the Apache Tomcat application server as an illustrative example of the insights gained from this approach. Although these results are preliminary, they open the door to further cross-discipline research that quantitatively links the concerns of business managers, entrepreneurs, policy-makers, and open source software developers.

  6. OpenFOAM: Open source CFD in research and industry

    Directory of Open Access Journals (Sweden)

    Hrvoje Jasak

    2009-12-01

    Full Text Available The current focus of development in industrial Computational Fluid Dynamics (CFD is integration of CFD into Computer-Aided product development, geometrical optimisation, robust design and similar. On the other hand, in CFD research aims to extend the boundaries of practical engineering use in “non-traditional” areas. Requirements of computational flexibility and code integration are contradictory: a change of coding paradigm, with object orientation, library components, equation mimicking is proposed as a way forward. This paper describes OpenFOAM, a C++ object oriented library for Computational Continuum Mechanics (CCM developed by the author. Efficient and flexible implementation of complex physical models is achieved by mimicking the form of partial differential equation in software, with code functionality provided in library form. Open Source deployment and development model allows the user to achieve desired versatility in physical modeling without the sacrifice of complex geometry support and execution efficiency.

  7. Interference suppression for EEG recording during open heart surgery

    NARCIS (Netherlands)

    Weide, H. van der; Pronk, R.A.F.

    1979-01-01

    A device for recording the EEG during open heart surgery is described. It differs from most standard equipment in two ways. First, the input circuit is completely floating from earth and will withstand 500 V DC. Second, radiofrequency (RF)_shielding and filtering permits continuous recording of the

  8. Mechanical bowel preparation in elective open colon surgery

    NARCIS (Netherlands)

    Fa-Si-Oen, Patrick Regnier

    2006-01-01

    Mechanical bowel preparation is a long standing practice in elective open colon surgery dating from the 1970's. It has always been believed to reduce the rate of postoperative complications in the form of anastomotic leakage and wound infection. In this thesis we broadly and thoroughly examine the v

  9. Is open surgery for head and neck cancers truly declining?

    NARCIS (Netherlands)

    Hartl, D.M.; Brasnu, D.F.; Shah, J.P.; Hinni, M.L.; Takes, R.P.; Olsen, K.D.; Kowalski, L.P.; Rodrigo, J.P.; Strojan, P.; Wolf, G.T.; Rinaldo, A.; Suarez, C.; Mendenhall, W.M.; Paleri, V.; Forastiere, A.A.; Werner, J.A.; Ferlito, A.

    2013-01-01

    In the past two decades, major modifications in the way we treat head and neck cancers, due to advances in technology and medical oncology, have led to a decline in the use of open surgery as first-line treatment of cancers arising from several primary tumor sites. The incidence of tobacco- and alco

  10. Computer Forensics Education - the Open Source Approach

    Science.gov (United States)

    Huebner, Ewa; Bem, Derek; Cheung, Hon

    In this chapter we discuss the application of the open source software tools in computer forensics education at tertiary level. We argue that open source tools are more suitable than commercial tools, as they provide the opportunity for students to gain in-depth understanding and appreciation of the computer forensic process as opposed to familiarity with one software product, however complex and multi-functional. With the access to all source programs the students become more than just the consumers of the tools as future forensic investigators. They can also examine the code, understand the relationship between the binary images and relevant data structures, and in the process gain necessary background to become the future creators of new and improved forensic software tools. As a case study we present an advanced subject, Computer Forensics Workshop, which we designed for the Bachelor's degree in computer science at the University of Western Sydney. We based all laboratory work and the main take-home project in this subject on open source software tools. We found that without exception more than one suitable tool can be found to cover each topic in the curriculum adequately. We argue that this approach prepares students better for forensic field work, as they gain confidence to use a variety of tools, not just a single product they are familiar with.

  11. From open source communications to knowledge

    Science.gov (United States)

    Preece, Alun; Roberts, Colin; Rogers, David; Webberley, Will; Innes, Martin; Braines, Dave

    2016-05-01

    Rapid processing and exploitation of open source information, including social media sources, in order to shorten decision-making cycles, has emerged as an important issue in intelligence analysis in recent years. Through a series of case studies and natural experiments, focussed primarily upon policing and counter-terrorism scenarios, we have developed an approach to information foraging and framing to inform decision making, drawing upon open source intelligence, in particular Twitter, due to its real-time focus and frequent use as a carrier for links to other media. Our work uses a combination of natural language (NL) and controlled natural language (CNL) processing to support information collection from human sensors, linking and schematising of collected information, and the framing of situational pictures. We illustrate the approach through a series of vignettes, highlighting (1) how relatively lightweight and reusable knowledge models (schemas) can rapidly be developed to add context to collected social media data, (2) how information from open sources can be combined with reports from trusted observers, for corroboration or to identify con icting information; and (3) how the approach supports users operating at or near the tactical edge, to rapidly task information collection and inform decision-making. The approach is supported by bespoke software tools for social media analytics and knowledge management.

  12. Cerebroprotective effect of piracetam in patients undergoing open heart surgery.

    Science.gov (United States)

    Holinski, Sebastian; Claus, Benjamin; Alaaraj, Nour; Dohmen, Pascal Maria; Neumann, Konrad; Uebelhack, Ralf; Konertz, Wolfgang

    2011-01-01

    Reduction of cognitive function is a possible side effect after the use of cardiopulmonary bypass (CPB) during cardiac surgery. Since it has been proven that piracetam is cerebroprotective in patients undergoing coronary bypass surgery, we investigated the effects of piracetam on the cognitive performance of patients undergoing open heart surgery. Patients scheduled for elective open heart surgery were randomized to the piracetam or placebo group in a double-blind study. Patients received 12 g of piracetam or placebo at the beginning of the operation. Six neuropsychological subtests from the Syndrom Kurz Test and the Alzheimer's Disease Assessment Scale were performed preoperatively and on day 3, postoperatively. To assess the overall cognitive function and the degree of cognitive decline across all tests after the surgery, we combined the six test-scores by principal component analysis. A total of 88 patients with a mean age of 67 years were enrolled into the study. The mean duration of CPB was 110 minutes. Preoperative clinical parameters and overall cognitive functions were not significantly different between the groups. The postoperative combined score of the neuropsychological tests showed deterioration of cognitive function in both groups (piracetam: preoperative 0.19 ± 0.97 vs. postoperative -0.97 ± 1.38, p piracetam did not perform better than those taking placebo, and both groups had the same decline of overall cognitive function (p = 0.955). Piracetam had no cerebroprotective effect in patients undergoing open heart surgery. Unlike the patients who underwent coronary surgery, piracetam did not reduce the early postoperative decline of neuropsychological abilities in heart valve patients.

  13. Open Source GIS based integrated watershed management

    Science.gov (United States)

    Byrne, J. M.; Lindsay, J.; Berg, A. A.

    2013-12-01

    Optimal land and water management to address future and current resource stresses and allocation challenges requires the development of state-of-the-art geomatics and hydrological modelling tools. Future hydrological modelling tools should be of high resolution, process based with real-time capability to assess changing resource issues critical to short, medium and long-term enviromental management. The objective here is to merge two renowned, well published resource modeling programs to create an source toolbox for integrated land and water management applications. This work will facilitate a much increased efficiency in land and water resource security, management and planning. Following an 'open-source' philosophy, the tools will be computer platform independent with source code freely available, maximizing knowledge transfer and the global value of the proposed research. The envisioned set of water resource management tools will be housed within 'Whitebox Geospatial Analysis Tools'. Whitebox, is an open-source geographical information system (GIS) developed by Dr. John Lindsay at the University of Guelph. The emphasis of the Whitebox project has been to develop a user-friendly interface for advanced spatial analysis in environmental applications. The plugin architecture of the software is ideal for the tight-integration of spatially distributed models and spatial analysis algorithms such as those contained within the GENESYS suite. Open-source development extends knowledge and technology transfer to a broad range of end-users and builds Canadian capability to address complex resource management problems with better tools and expertise for managers in Canada and around the world. GENESYS (Generate Earth Systems Science input) is an innovative, efficient, high-resolution hydro- and agro-meteorological model for complex terrain watersheds developed under the direction of Dr. James Byrne. GENESYS is an outstanding research and applications tool to address

  14. Building Energy Management Open Source Software

    Energy Technology Data Exchange (ETDEWEB)

    2017-06-20

    This is the repository for Building Energy Management Open Source Software (BEMOSS), which is an open source operating system that is engineered to improve sensing and control of equipment in small- and medium-sized commercial buildings. BEMOSS offers the following key features: (1) Open source, open architecture – BEMOSS is an open source operating system that is built upon VOLTTRON – a distributed agent platform developed by Pacific Northwest National Laboratory (PNNL). BEMOSS was designed to make it easy for hardware manufacturers to seamlessly interface their devices with BEMOSS. Software developers can also contribute to adding additional BEMOSS functionalities and applications. (2) Plug & play – BEMOSS was designed to automatically discover supported load controllers (including smart thermostats, VAV/RTUs, lighting load controllers and plug load controllers) in commercial buildings. (3) Interoperability – BEMOSS was designed to work with load control devices form different manufacturers that operate on different communication technologies and data exchange protocols. (4) Cost effectiveness – Implementation of BEMOSS deemed to be cost-effective as it was built upon a robust open source platform that can operate on a low-cost single-board computer, such as Odroid. This feature could contribute to its rapid deployment in small- or medium-sized commercial buildings. (5) Scalability and ease of deployment – With its multi-node architecture, BEMOSS provides a distributed architecture where load controllers in a multi-floor and high occupancy building could be monitored and controlled by multiple single-board computers hosting BEMOSS. This makes it possible for a building engineer to deploy BEMOSS in one zone of a building, be comfortable with its operation, and later on expand the deployment to the entire building to make it more energy efficient. (6) Ability to provide local and remote monitoring – BEMOSS provides both local and remote monitoring

  15. Deep Learning in Open Source Learning Streams

    DEFF Research Database (Denmark)

    Kjærgaard, Thomas

    2016-01-01

    This chapter presents research on deep learning in a digital learning environment and raises the question if digital instructional designs can catalyze deeper learning than traditional classroom teaching. As a theoretical point of departure the notion of ‘situated learning’ is utilized...... and contrasted to the notion of functionalistic learning in a digital context. The mechanism that enables deep learning in this context is ‘The Open Source Learning Stream’. ‘The Open Source Learning Stream’ is the notion of sharing ‘learning instances’ in a digital space (discussion board, Facebook group......, Twitter hashtags etc.). The ‘learning instances’ are described as mediated signs of learning expressed through text in the stream that is further developed by peers and by the teacher. The expressions of ‘learning instances’ are analyzed and categorized according to whether it expresses prestructural...

  16. Usability in open source software development

    DEFF Research Database (Denmark)

    Andreasen, M. S.; Nielsen, H. V.; Schrøder, S. O.

    2006-01-01

    Open Source Software (OSS) development has gained significant importance in the production of soft-ware products. Open Source Software developers have produced systems with a functionality that is competitive with similar proprietary software developed by commercial software organizations. Yet OSS...... is usually designed for and by power-users, and OSS products have been criticized for having little or no emphasis on usability. We have conducted an empirical study of the developers’ opinions about usability and the way usability engineering is practiced in a variety of OSS projects. The study included...... a questionnaire survey and a series of interviews, where we interviewed OSS contributors with both technical and usability backgrounds. Overall we found that OSS developers are interested in usability, but in practice it is not top priority, and OSS projects rarely employs systematic usability evaluation. Most...

  17. An Open-Source Based ITS Platform

    DEFF Research Database (Denmark)

    Andersen, Ove; Krogh, Benjamin Bjerre; Torp, Kristian

    2013-01-01

    In this paper, a complete platform used to compute travel times from GPS data is described. Two approaches to computing travel time are proposed one based on points and one based on trips. Overall both approaches give reasonable results compared to existing manual estimated travel times. However......, the trip-based approach requires more GPS data and of a higher quality than the point-based approach. The platform has been completely implemented using open-source software. The main conclusion is that large quantity of GPS data can be managed, with a limited budget and that GPS data is a good source...

  18. An Open-Source Microscopic Traffic Simulator

    CERN Document Server

    Treiber, Martin; 10.1109/MITS.2010.939208

    2010-01-01

    We present the interactive Java-based open-source traffic simulator available at www.traffic-simulation.de. In contrast to most closed-source commercial simulators, the focus is on investigating fundamental issues of traffic dynamics rather than simulating specific road networks. This includes testing theories for the spatiotemporal evolution of traffic jams, comparing and testing different microscopic traffic models, modeling the effects of driving styles and traffic rules on the efficiency and stability of traffic flow, and investigating novel ITS technologies such as adaptive cruise control, inter-vehicle and vehicle-infrastructure communication.

  19. Integrated open source mine workers compensation system

    CSIR Research Space (South Africa)

    Coetzee, L

    2006-08-01

    Full Text Available the solution using open-source technologies. Previously the department had already ADMINISTRATIO PUBLICA - VOL 14 NO 2 AUGUST 2006 126 invested heavily in Oracle as persistence store. It was therefore decided to continue with Oracle as back-end store, even... (the Oracle database) was obtained using JDBC. To support collaboration between the distributed users (each with different tasks and requirements) a role-based access control module was developed. Each registered user has various roles assigned...

  20. Datacube Services in Action, Using Open Source and Open Standards

    Science.gov (United States)

    Baumann, P.; Misev, D.

    2016-12-01

    Array Databases comprise novel, promising technology for massive spatio-temporal datacubes, extending the SQL paradigm of "any query, anytime" to n-D arrays. On server side, such queries can be optimized, parallelized, and distributed based on partitioned array storage. The rasdaman ("raster data manager") system, which has pioneered Array Databases, is available in open source on www.rasdaman.org. Its declarative query language extends SQL with array operators which are optimized and parallelized on server side. The rasdaman engine, which is part of OSGeo Live, is mature and in operational use databases individually holding dozens of Terabytes. Further, the rasdaman concepts have strongly impacted international Big Data standards in the field, including the forthcoming MDA ("Multi-Dimensional Array") extension to ISO SQL, the OGC Web Coverage Service (WCS) and Web Coverage Processing Service (WCPS) standards, and the forthcoming INSPIRE WCS/WCPS; in both OGC and INSPIRE, OGC is WCS Core Reference Implementation. In our talk we present concepts, architecture, operational services, and standardization impact of open-source rasdaman, as well as experiences made.

  1. Open Knee: Open Source Modeling and Simulation in Knee Biomechanics.

    Science.gov (United States)

    Erdemir, Ahmet

    2016-02-01

    Virtual representations of the knee joint can provide clinicians, scientists, and engineers the tools to explore mechanical functions of the knee and its tissue structures in health and disease. Modeling and simulation approaches such as finite element analysis also provide the possibility to understand the influence of surgical procedures and implants on joint stresses and tissue deformations. A large number of knee joint models are described in the biomechanics literature. However, freely accessible, customizable, and easy-to-use models are scarce. Availability of such models can accelerate clinical translation of simulations, where labor-intensive reproduction of model development steps can be avoided. Interested parties can immediately utilize readily available models for scientific discovery and clinical care. Motivated by this gap, this study aims to describe an open source and freely available finite element representation of the tibiofemoral joint, namely Open Knee, which includes the detailed anatomical representation of the joint's major tissue structures and their nonlinear mechanical properties and interactions. Three use cases illustrate customization potential of the model, its predictive capacity, and its scientific and clinical utility: prediction of joint movements during passive flexion, examining the role of meniscectomy on contact mechanics and joint movements, and understanding anterior cruciate ligament mechanics. A summary of scientific and clinically directed studies conducted by other investigators are also provided. The utilization of this open source model by groups other than its developers emphasizes the premise of model sharing as an accelerator of simulation-based medicine. Finally, the imminent need to develop next-generation knee models is noted. These are anticipated to incorporate individualized anatomy and tissue properties supported by specimen-specific joint mechanics data for evaluation, all acquired in vitro from varying age

  2. Open source software to control Bioflo bioreactors.

    Directory of Open Access Journals (Sweden)

    David A Burdge

    Full Text Available Bioreactors are designed to support highly controlled environments for growth of tissues, cell cultures or microbial cultures. A variety of bioreactors are commercially available, often including sophisticated software to enhance the functionality of the bioreactor. However, experiments that the bioreactor hardware can support, but that were not envisioned during the software design cannot be performed without developing custom software. In addition, support for third party or custom designed auxiliary hardware is often sparse or absent. This work presents flexible open source freeware for the control of bioreactors of the Bioflo product family. The functionality of the software includes setpoint control, data logging, and protocol execution. Auxiliary hardware can be easily integrated and controlled through an integrated plugin interface without altering existing software. Simple experimental protocols can be entered as a CSV scripting file, and a Python-based protocol execution model is included for more demanding conditional experimental control. The software was designed to be a more flexible and free open source alternative to the commercially available solution. The source code and various auxiliary hardware plugins are publicly available for download from https://github.com/LibourelLab/BiofloSoftware. In addition to the source code, the software was compiled and packaged as a self-installing file for 32 and 64 bit windows operating systems. The compiled software will be able to control a Bioflo system, and will not require the installation of LabVIEW.

  3. Open source software to control Bioflo bioreactors.

    Science.gov (United States)

    Burdge, David A; Libourel, Igor G L

    2014-01-01

    Bioreactors are designed to support highly controlled environments for growth of tissues, cell cultures or microbial cultures. A variety of bioreactors are commercially available, often including sophisticated software to enhance the functionality of the bioreactor. However, experiments that the bioreactor hardware can support, but that were not envisioned during the software design cannot be performed without developing custom software. In addition, support for third party or custom designed auxiliary hardware is often sparse or absent. This work presents flexible open source freeware for the control of bioreactors of the Bioflo product family. The functionality of the software includes setpoint control, data logging, and protocol execution. Auxiliary hardware can be easily integrated and controlled through an integrated plugin interface without altering existing software. Simple experimental protocols can be entered as a CSV scripting file, and a Python-based protocol execution model is included for more demanding conditional experimental control. The software was designed to be a more flexible and free open source alternative to the commercially available solution. The source code and various auxiliary hardware plugins are publicly available for download from https://github.com/LibourelLab/BiofloSoftware. In addition to the source code, the software was compiled and packaged as a self-installing file for 32 and 64 bit windows operating systems. The compiled software will be able to control a Bioflo system, and will not require the installation of LabVIEW.

  4. Laparoscopic cholecystectomy causes less sleep disturbance than open abdominal surgery

    DEFF Research Database (Denmark)

    Gögenur, I; Rosenberg-Adamsen, S; Kiil, C

    2001-01-01

    was present 1 week after laparoscopy and 4 weeks after laparotomy. CONCLUSIONS: After laparotomy, total sleep time increased and there was a change in diurnal sleep distribution. These sleep alterations were less pronounced after laparoscopic cholecystectomy. Thus, sleep architecture was disturbed for ?4......BACKGROUND: The aim of this study was to examine subjective sleep quality before and after laparoscopic vs open abdominal surgery. METHODS: Twelve patients undergoing laparoscopic cholecystectomy and 15 patients undergoing laparotomy were evaluated with the aid of a sleep questionnaire from 4 days...... before until 4 weeks after surgery. RESULTS: Following laparoscopic surgery, total sleep time increased during the 1st week after the operation compared with preoperative values (p = 0.02), whereas sleep duration during weeks 2, 3, and 4 did not differ from the times reported preoperatively. Following...

  5. Arthroscopic Revision Surgery for Failure of Open Latarjet Technique.

    Science.gov (United States)

    Cuéllar, Adrián; Cuéllar, Ricardo; de Heredia, Pablo Beltrán

    2017-05-01

    To evaluate the efficacy in treating pain, limited range of motion, and continued instability of the Latarjet open technique via the use of arthroscopy. A retrospective review of patients who underwent arthroscopic capsule plication after failure of an open Latarjet technique was performed. Revision surgery was indicated in cases of recurrent instability and associated pain. Only patients with a glenoid defect Latarjet with a glenoid bone defect Latarjet procedures. Level IV, therapeutic case series. Copyright © 2016 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.

  6. Open Source Testing Capability for Geospatial Software

    Science.gov (United States)

    Bermudez, L. E.

    2013-12-01

    Geospatial Software enables scientists to discover, access and process information for better understanding of the Earth. Hundreds, if not thousands, of geospatial software packages exist today. Many of these implement open standards. The OGC Implementation Statistics page [1] reports, for example, more than 450 software products that implement the OGC Web Map Service (WMS) 1.1.1 standard. Even though organizations voluntarily report their products as implementing the WMS standard, not all of these implementations can interoperate with each other. For example, a WMS client may not interact with all these WMS servers in the same functional way. Making the software work with other software, even when implementing the same standard, still remains a challenge, and the main reason is that not all implementations implement the standard correctly. The Open Geospatial Consortium (OGC) Compliance Program provides a testing infrastructure to test for the correct implementation of OGC standards in interfaces and encodings that enable communication between geospatial clients and servers. The OGC testing tool and the tests are all freely available, including the source code and access to the testing facility. The Test, Evaluation, And Measurement (TEAM) Engine is a test harness that executes test suites written using the OGC Compliance Testing Language (CTL) or the TestNG framework. TEAM Engine is available in Sourceforge. OGC hosts an official stable [2] deployment of TEAM Engine with the approved test suites. OGC also hosts a Beta TEAM Engine [3] with the tests in Beta and with new TEAM Engine functionality. Both deployments are freely available to everybody. The OGC testing infrastructure not only enables developers to test OGC standards, but it can be configured to test profiles of OGC standards and community-developed application agreements. These agreements can be any interface and encoding agreement, not only OGC based. The OGC Compliance Program is thus an important

  7. Postoperative Adiponectin Levels in Pediatric Patients Undergoing Open Heart Surgery

    Directory of Open Access Journals (Sweden)

    A. Thaler

    2013-01-01

    Full Text Available Background. Adipose tissue is an important endocrine organ that secretes cytokines, including adiponectin, levels of which are negatively correlated with the severity of the inflammatory process. Aim. To assess the time course of adiponectin levels following open heart surgery with cardiopulmonary bypass and its correlation with early postoperative outcomes. Materials and Methods. Blood samples were obtained from 24 children undergoing cardiac surgery and analyzed for adiponectin, C-reactive protein, and other inflammatory markers. Results. Baseline adiponectin levels were negatively correlated with patients’ preoperative weight and age. Postoperative adiponectin levels decreased compared to baseline ( and correlated negatively with duration of cardiopulmonary bypass (, , length of stay in the pediatric intensive care unit (, , and the inotropic score (, . Adiponectin levels were positively correlated with sVCAM 1 levels; however, there was no correlation between adiponectin levels and sP selectin, tPA, MCP1, and sCD40. Conclusions. The inflammatory response after open heart surgery with cardiopulmonary bypass is associated with a reduction in adiponectin levels. Prolonged or more complicated surgery induced a more substantial inflammatory process characterized by a significant reduction in adiponectin levels over time and a delayed return to baseline levels.

  8. Patient Perceptions of Open, Laparoscopic, and Robotic Gynecological Surgeries

    Directory of Open Access Journals (Sweden)

    Mohamad Irani

    2016-01-01

    Full Text Available Objective. To investigate patient knowledge and attitudes toward surgical approaches in gynecology. Design. An anonymous Institutional Review Board (IRB approved questionnaire survey. Patients/Setting. A total of 219 women seeking obstetrical and gynecological care in two offices affiliated with an academic medical center. Results. Thirty-four percent of the participants did not understand the difference between open and laparoscopic surgeries. 56% of the participants knew that laparoscopy is a better surgical approach for patients than open abdominal surgeries, while 37% thought that laparoscopy requires the surgeon to have a higher technical skill. 46% of the participants do not understand the difference between laparoscopic and robotic procedures. 67.5% of the participants did not know that the surgeon moves the robot’s arms to perform the surgery. Higher educational level and/or history of previous abdominal surgeries were associated with the highest rates of answering all the questions correctly (p<0.05, after controlling for age and race. Conclusions. A substantial percentage of patients do not understand the difference between various surgical approaches. Health care providers should not assume that their patients have an adequate understanding of their surgical options and accordingly should educate them about those options so they can make truly informed decisions.

  9. An Open-Source ITS Platform

    DEFF Research Database (Denmark)

    Andersen, Ove; Torp, Kristian

    2012-01-01

    , the trip-based approach requires more GPS data and of a higher quality than the point-based approach. The system has been completely implemented using open-source software and is in production. A detailed performance study, using a desktop PC, shows that the system can handle large data sizes...... and that the performance scales, for some components, linearly with the number of processor cores available. The main conclusion is that large quantity of GPS data can, with a very limited budget, used for estimating travel times, if enough GPS data is available....

  10. Open Source Live Distributions for Computer Forensics

    Science.gov (United States)

    Giustini, Giancarlo; Andreolini, Mauro; Colajanni, Michele

    Current distributions of open source forensic software provide digital investigators with a large set of heterogeneous tools. Their use is not always focused on the target and requires high technical expertise. We present a new GNU/Linux live distribution, named CAINE (Computer Aided INvestigative Environment) that contains a collection of tools wrapped up into a user friendly environment. The CAINE forensic framework introduces novel important features, aimed at filling the interoperability gap across different forensic tools. Moreover, it provides a homogeneous graphical interface that drives digital investigators during the acquisition and analysis of electronic evidence, and it offers a semi-automatic mechanism for the creation of the final report.

  11. Software development an open source approach

    CERN Document Server

    Tucker, Allen; de Silva, Chamindra

    2011-01-01

    Overview and Motivation Software Free and Open Source Software (FOSS)Two Case Studies Working with a Project Team Key FOSS Activities Client-Oriented vs. Community-Oriented Projects Working on a Client-Oriented Project Joining a Community-Oriented Project Using Project Tools Collaboration Tools Code Management Tools Run-Time System ConstraintsSoftware Architecture Architectural Patterns Layers, Cohesion, and Coupling Security Concurrency, Race Conditions, and DeadlocksWorking with Code Bad Smells and Metrics Refactoring Testing Debugging Extending the Software for a New ProjectDeveloping the D

  12. Developing Open Source System Expertise in Europe

    DEFF Research Database (Denmark)

    Nyborg, Mads; Gustafsson, Finn; Christensen, Jørgen Erik

    2011-01-01

    are interested in knowing which factors play a role in information systems and what the similarities and differences between the various national approaches in open source software systems and techniques are. The event forms a unique opportunity in promoting active learning in an international environment....... Students get experience working in teams across country boundaries. In the paper we will describe the structure and our experiences from participating in this IP with relation to the CDIO initiative. Finally we draw conclusions and give our recommendations based on those....

  13. Google and Open Source (Keynote Talk)

    OpenAIRE

    DiBona, Chris

    2015-01-01

    In this talk Chris DiBona will review Google's use of open source projects and the history of prominent releases like Android, Chromium, Angular.js and some 3500 other projects (though not all of them will be surveyed!). Keeping such releases on track and efficient and, in some cases, retiring them has been his focus since he started at the company. He'll review the various ways Google supports the worldwide community of software developers that it has derived so much value from. Specifically...

  14. New Open Source E-Learning Book

    Directory of Open Access Journals (Sweden)

    TOJDE

    2004-04-01

    Full Text Available We would like to promote and introduce a new book that Terry Anderson and Fathi Elloumi have edited from Athabasca University. It is entitled Theory and Practice of Online Learning. The book is licensed for educational and non commercial use, download and printing under a Creative Commons license. We have released it as open source so that it can be more easily accessed by professionals and hopefully used in coursework by learners throughout the world. During the two weeks since its release in mid February over 4300 individual downloads were made of the whole book, in addition to many for individualchapters.

  15. Open Source Energy Simulation for Elementary School

    CERN Document Server

    Lye, Sze Yee

    2012-01-01

    With the interactivity and multiple representation features, computer simulations lend itself to the guided inquiry learning. However, these simulations are usually designed for post-elementary students. Thus, the aim of this study is to investigate how the use of guided inquiry approach with customized energy simulation can improve students' understanding of this topic. In this ongoing research, the case study is adopted. In the first phase of the study, we have modified open source energy simulation based on principles for reducing extraneous processing, existing energy simulation and guided inquiry approach. The modified simulation is sent to teachers for evaluation and the feedback is encouraging. In the next phase of the study, the guided inquiry lesson package involving the energy simulation would be designed and deployed in an elementary classroom. Multiple data sources would be collected to seek a deeper understanding on how this learning package can possibly impact students' understanding of the phys...

  16. HEART TRANSPLANTATION IN PATIENTS WITH PREVIOUS OPEN HEART SURGERY

    Directory of Open Access Journals (Sweden)

    R. Sh. Saitgareev

    2016-01-01

    Full Text Available Heart Transplantation (HTx to date remains the most effective and radical method of treatment of patients with end-stage heart failure. The defi cit of donor hearts is forcing to resort increasingly to the use of different longterm mechanical circulatory support systems, including as a «bridge» to the follow-up HTx. According to the ISHLT Registry the number of recipients underwent cardiopulmonary bypass surgery increased from 40% in the period from 2004 to 2008 to 49.6% for the period from 2009 to 2015. HTx performed in repeated patients, on the one hand, involves considerable technical diffi culties and high risks; on the other hand, there is often no alternative medical intervention to HTx, and if not dictated by absolute contradictions the denial of the surgery is equivalent to 100% mortality. This review summarizes the results of a number of published studies aimed at understanding the immediate and late results of HTx in patients, previously underwent open heart surgery. The effect of resternotomy during HTx and that of the specifi c features associated with its implementation in recipients previously operated on open heart, and its effects on the immediate and long-term survival were considered in this review. Results of studies analyzing the risk factors for perioperative complications in repeated recipients were also demonstrated. Separately, HTx risks after implantation of prolonged mechanical circulatory support systems were examined. The literature does not allow to clearly defi ning the impact factor of earlier performed open heart surgery on the course of perioperative period and on the prognosis of survival in recipients who underwent HTx. On the other hand, subject to the regular fl ow of HTx and the perioperative period the risks in this clinical situation are justifi ed as a long-term prognosis of recipients previously conducted open heart surgery and are comparable to those of patients who underwent primary HTx. Studies

  17. Open Source CRM Systems for SMEs

    CERN Document Server

    Tereso, Marco

    2011-01-01

    Customer Relationship Management (CRM) systems are very common in large companies. However, CRM systems are not very common in Small and Medium Enterprises (SMEs). Most SMEs do not implement CRM systems due to several reasons, such as lack of knowledge about CRM or lack of financial resources to implement CRM systems. SMEs have to start implementing Information Systems (IS) technology into their business operations in order to improve business values and gain more competitive advantage over rivals. CRM system has the potential to help improve the business value and competitive capabilities of SMEs. Given the high fixed costs of normal activity of companies, we intend to promote free and viable solutions for small and medium businesses. In this paper, we explain the reasons why SMEs do not implement CRM system and the benefits of using open source CRM system in SMEs. We also describe the functionalities of top open source CRM systems, examining the applicability of these tools in fitting the needs of SMEs.

  18. The open-source neuroimaging research enterprise.

    Science.gov (United States)

    Marcus, Daniel S; Archie, Kevin A; Olsen, Timothy R; Ramaratnam, Mohana

    2007-11-01

    While brain imaging in the clinical setting is largely a practice of looking at images, research neuroimaging is a quantitative and integrative enterprise. Images are run through complex batteries of processing and analysis routines to generate numeric measures of brain characteristics. Other measures potentially related to brain function - demographics, genetics, behavioral tests, neuropsychological tests - are key components of most research studies. The canonical scanner - PACS - viewing station axis used in clinical practice is therefore inadequate for supporting neuroimaging research. Here, we model the neuroimaging research enterprise as a workflow. The principal components of the workflow include data acquisition, data archiving, data processing and analysis, and data utilization. We also describe a set of open-source applications to support each step of the workflow and the transitions between these steps. These applications include DIGITAL IMAGING AND COMMUNICATIONS IN MEDICINE viewing and storage tools, the EXTENSIBLE NEUROIMAGING ARCHIVE TOOLKIT data archiving and exploration platform, and an engine for running processing/analysis pipelines. The overall picture presented is aimed to motivate open-source developers to identify key integration and communication points for interoperating with complimentary applications.

  19. Repositorios digitales y software open source

    Directory of Open Access Journals (Sweden)

    Doria, María Vanesa

    2015-06-01

    Full Text Available En la actualidad las universidades se encuentran en constante evolución, fruto de la transformación generada por la sociedad de la información y el conocimiento, donde la transversalidad son las Tecnologías de la Información y Comunicación (TIC, que tienen como objetivo ampliar el acceso a la información y el conocimiento a través de su herramienta digital más distinguida, Internet. Las universidades retroalimentan su conocimiento e información, mediante las producciones científicasacadémicas, y para promover el acceso a ellas, muchas universidades están inclinándose al movimiento del Acceso Abierto (AA siguiendo la vía verde en el desarrollo de repositorios digitales (RD. Para la creación de RD es necesario analizar los software open source disponibles, dado que estos son las herramientas que facilitan la automatización de los mismos. El presente estudio se centra en el análisis de los software open source existentes en el mercado.

  20. Open Source Hardware for DIY Environmental Sensing

    Science.gov (United States)

    Aufdenkampe, A. K.; Hicks, S. D.; Damiano, S. G.; Montgomery, D. S.

    2014-12-01

    The Arduino open source electronics platform has been very popular within the DIY (Do It Yourself) community for several years, and it is now providing environmental science researchers with an inexpensive alternative to commercial data logging and transmission hardware. Here we present the designs for our latest series of custom Arduino-based dataloggers, which include wireless communication options like self-meshing radio networks and cellular phone modules. The main Arduino board uses a custom interface board to connect to various research-grade sensors to take readings of turbidity, dissolved oxygen, water depth and conductivity, soil moisture, solar radiation, and other parameters. Sensors with SDI-12 communications can be directly interfaced to the logger using our open Arduino-SDI-12 software library (https://github.com/StroudCenter/Arduino-SDI-12). Different deployment options are shown, like rugged enclosures to house the loggers and rigs for mounting the sensors in both fresh water and marine environments. After the data has been collected and transmitted by the logger, the data is received by a mySQL-PHP stack running on a web server that can be accessed from anywhere in the world. Once there, the data can be visualized on web pages or served though REST requests and Water One Flow (WOF) services. Since one of the main benefits of using open source hardware is the easy collaboration between users, we are introducing a new web platform for discussion and sharing of ideas and plans for hardware and software designs used with DIY environmental sensors and data loggers.

  1. An Open Source Tool to Test Interoperability

    Science.gov (United States)

    Bermudez, L. E.

    2012-12-01

    Scientists interact with information at various levels from gathering of the raw observed data to accessing portrayed processed quality control data. Geoinformatics tools help scientist on the acquisition, storage, processing, dissemination and presentation of geospatial information. Most of the interactions occur in a distributed environment between software components that take the role of either client or server. The communication between components includes protocols, encodings of messages and managing of errors. Testing of these communication components is important to guarantee proper implementation of standards. The communication between clients and servers can be adhoc or follow standards. By following standards interoperability between components increase while reducing the time of developing new software. The Open Geospatial Consortium (OGC), not only coordinates the development of standards but also, within the Compliance Testing Program (CITE), provides a testing infrastructure to test clients and servers. The OGC Web-based Test Engine Facility, based on TEAM Engine, allows developers to test Web services and clients for correct implementation of OGC standards. TEAM Engine is a JAVA open source facility, available at Sourceforge that can be run via command line, deployed in a web servlet container or integrated in developer's environment via MAVEN. The TEAM Engine uses the Compliance Test Language (CTL) and TestNG to test HTTP requests, SOAP services and XML instances against Schemas and Schematron based assertions of any type of web service, not only OGC services. For example, the OGC Web Feature Service (WFS) 1.0.0 test has more than 400 test assertions. Some of these assertions includes conformance of HTTP responses, conformance of GML-encoded data; proper values for elements and attributes in the XML; and, correct error responses. This presentation will provide an overview of TEAM Engine, introduction of how to test via the OGC Testing web site and

  2. International free and open source software law review

    National Research Council Canada - National Science Library

    2009-01-01

    "The International Free and Open Source Software Law Review (IFOSS L. Rev.) is a collaborative legal publication aiming to increase knowledge and understanding among lawyers about Free and Open Source Software issues...

  3. Critical appraisal of laparoscopic vs open rectal cancer surgery

    Institute of Scientific and Technical Information of China (English)

    Winson Jianhong Tan; Min Hoe Chew; Angela Renayanti Dharmawan; Manraj Singh; Sanchalika Acharyya; Carol Tien Tau Loi; Choong Leong Tang

    2016-01-01

    AIM:To evaluate the long-term clinical and oncological outcomes of laparoscopic rectal resection(LRR) and the impact of conversion in patients with rectal cancer.METHODS:An analysis was performed on a prospective database of 633 consecutive patients with rectal cancer who underwent surgical resection.Patients were compared in three groups:Open surgery(OP),laparoscopic surgery,and converted laparoscopic surgery.Short-term outcomes,long-term outcomes,and survival analysis were compared.RESULTS:Among 633 patients studied,200 patients had successful laparoscopic resections with a conversion rate of 11.1%(25 out of 225).Factors predictive of survival on univariate analysis include the laparoscopic approach(P = 0.016),together with factors such as age,ASA status,stage of disease,tumor grade,presence of perineural invasion and vascular emboli,circumferential resection margin < 2 mm,and postoperative adjuvant chemotherapy.The survival benefit of laparoscopic surgery was no longer significant on multivariateanalysis(P = 0.148).Neither 5-year overall survival(70.5% vs 61.8%,P = 0.217) nor 5-year cancer free survival(64.3% vs 66.6%,P = 0.854) were significantly different between the laparoscopic group and the converted group.CONCLUSION:LRR has equivalent long-term oncologic out c ome s w he n c ompare d t o OP.Laparos c opic conversion does not confer a worse prognosis.

  4. Building Eclectic Personal Learning Landscapes with Open Source Tools

    NARCIS (Netherlands)

    Kalz, Marco

    2008-01-01

    Kalz, M. (2005). Building Eclectic Personal Learning Landscapes with Open Source Tools. In F. de Vries, G. Attwell, R. Elferink & A. Tödt (Eds.), Open Source for Education in Europe. Research & Practice (= Proceedings of the Open Source for Education in Europe Conference) (pp. 163-168). 2005, Heerle

  5. A survey of open source tools for business intelligence

    DEFF Research Database (Denmark)

    Thomsen, Christian; Pedersen, Torben Bach

    2005-01-01

    The industrial use of open source Business Intelligence (BI) tools is not yet common. It is therefore of interest to explore which possibilities are available for open source BI and compare the tools. In this survey paper, we consider the capabilities of a number of open source tools for BI...

  6. An Analysis of Open Source Security Software Products Downloads

    Science.gov (United States)

    Barta, Brian J.

    2014-01-01

    Despite the continued demand for open source security software, a gap in the identification of success factors related to the success of open source security software persists. There are no studies that accurately assess the extent of this persistent gap, particularly with respect to the strength of the relationships of open source software…

  7. Building Eclectic Personal Learning Landscapes with Open Source Tools

    NARCIS (Netherlands)

    Kalz, Marco

    2008-01-01

    Kalz, M. (2005). Building Eclectic Personal Learning Landscapes with Open Source Tools. In F. de Vries, G. Attwell, R. Elferink & A. Tödt (Eds.), Open Source for Education in Europe. Research & Practice (= Proceedings of the Open Source for Education in Europe Conference) (pp. 163-168). 2005,

  8. An Analysis of Open Source Security Software Products Downloads

    Science.gov (United States)

    Barta, Brian J.

    2014-01-01

    Despite the continued demand for open source security software, a gap in the identification of success factors related to the success of open source security software persists. There are no studies that accurately assess the extent of this persistent gap, particularly with respect to the strength of the relationships of open source software…

  9. Behind Linus's Law: Investigating Peer Review Processes in Open Source

    Science.gov (United States)

    Wang, Jing

    2013-01-01

    Open source software has revolutionized the way people develop software, organize collaborative work, and innovate. The numerous open source software systems that have been created and adopted over the past decade are influential and vital in all aspects of work and daily life. The understanding of open source software development can enhance its…

  10. Open Source Software The Challenge Ahead

    CERN Document Server

    CERN. Geneva

    2007-01-01

    The open source community has done amazingly well in terms of challenging the historical epicenter of computing - the supercomputer and data center - and driving change there. Linux now represents a healthy and growing share of infrastructure in large organisations globally. Apache and other infrastructural components have established the new de facto standard for software in the back office: freedom. It would be easy to declare victory. But the real challenge lies ahead - taking free software to the mass market, to your grandparents, to your nieces and nephews, to your friends. This is the next wave, and if we are to be successful we need to articulate the audacious goals clearly and loudly - because that's how the community process works best. Speaker Bio: Mark Shuttleworth founded the Ubuntu Project in early 2004. Ubuntu is an enterprise Linux distribution that is freely available worldwide and has both desktop and enterprise server editions. Mark studied finance and information technology at the Universit...

  11. Evolution of an Open Source Strategy

    Directory of Open Access Journals (Sweden)

    Ronald Baecker

    2007-10-01

    Full Text Available On June 8th, 2005, we officially launched the ePresence (http://epresence.tv/ Interactive Media Open Source Consortium, at the Knowledge Media Design Institute (KMDI, University of Toronto (UofT. We had been researching and developing ePresence, our webcasting, webconferencing, and archiving software project for about five years. Throughout the early phase of the project we used the system to produce live webcasts of KMDI's annual lecture series. Eventually word spread about our webcasting system and other universities, such as Memorial University in Newfoundland, became interested. It was obvious that the time to share our project with the world had come, but what wasn't obvious to us at the time was how we were going to do that.

  12. HERAFitter, Open Source QCD Fit Project

    CERN Document Server

    Alekhin, S.; Belov, P.; Borroni, S.; Botje, M.; Britzger, D.; Camarda, S.; Cooper-Sarkar, A.M.; Daum, K.; Diaconu, C.; Feltesse, J.; Gizhko, A.; Glazov, A.; Guffanti, A.; Guzzi, M.; Hautmann, F.; Jung, A.; Jung, H.; Kolesnikov, V.; Kowalski, H.; Kuprash, O.; Kusina, A.; Levonian, S.; Lipka, K.; Lobodzinski, B.; Lohwasser, K.; Luszczak, A.; Malaescu, B.; McNulty, R.; Myronenko, V.; Naumann-Emme, S.; Nowak, K.; Olness, F.; Perez, E.; Pirumov, H.; Plačakytė, R.; Rabbertz, K.; Radescu, V.; Sadykov, R.; Salam, G.P.; Sapronov, A.; Schöning, A.; Schörner-Sadenius, T.; Shushkevich, S.; Slominski, W.; Spiesberger, H.; Starovoitov, P.; Sutton, M.; Tomaszewska, J.; Turkot, O.; Vargas, A.; Watt, G.; Wichmann, K.

    2015-07-02

    HERAFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton and for many different kinds of analyses in Quantum Chromodynamics (QCD). It encodes results from a wide range of experimental measurements in lepton-proton deep inelastic scattering and proton-proton (proton-antiproton) collisions at hadron colliders. These are complemented with a variety of theoretical options for calculating PDF-dependent cross section predictions corresponding to the measurements. The framework covers a large number of the existing methods and schemes used for PDF determination. The data and theoretical predictions are brought together through numerous methodological options for carrying out PDF fits and plotting tools to help visualise the results. While primarily based on the approach of collinear factorisation, HERAFitter also provides facilities for fits of dipole models and transverse-momentum dependent PDFs. The package can be used to study t...

  13. The architecture of open source applications

    CERN Document Server

    Wilson, Greg

    2012-01-01

    Architects look at thousands of buildings during their training, and study critiques of those buildings written by masters. In contrast, most software developers only ever get to know a handful of large programs well - usually programs they wrote themselves - and never study the great programs of history. As a result, they repeat one another's mistakes rather than building on one another's successes. This book's goal is to change that. In it, the authors of twenty-five open source applications explain how their software is structured, and why. What are each program's major components? How do they interact? And what did their builders learn during their development? In answering these questions, the contributors to this book provide unique insights into how they think.

  14. An Affordable Open-Source Turbidimeter

    Science.gov (United States)

    Kelley, Christopher D.; Krolick, Alexander; Brunner, Logan; Burklund, Alison; Kahn, Daniel; Ball, William P.; Weber-Shirk, Monroe

    2014-01-01

    Turbidity is an internationally recognized criterion for assessing drinking water quality, because the colloidal particles in turbid water may harbor pathogens, chemically reduce oxidizing disinfectants, and hinder attempts to disinfect water with ultraviolet radiation. A turbidimeter is an electronic/optical instrument that assesses turbidity by measuring the scattering of light passing through a water sample containing such colloidal particles. Commercial turbidimeters cost hundreds or thousands of dollars, putting them beyond the reach of low-resource communities around the world. An affordable open-source turbidimeter based on a single light-to-frequency sensor was designed and constructed, and evaluated against a portable commercial turbidimeter. The final product, which builds on extensive published research, is intended to catalyze further developments in affordable water and sanitation monitoring. PMID:24759114

  15. Building Energy Management Open Source Software

    Energy Technology Data Exchange (ETDEWEB)

    Rahman, Saifur [Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)

    2017-08-25

    Funded by the U.S. Department of Energy in November 2013, a Building Energy Management Open Source Software (BEMOSS) platform was engineered to improve sensing and control of equipment in small- and medium-sized commercial buildings. According to the Energy Information Administration (EIA), small- (5,000 square feet or smaller) and medium-sized (between 5,001 to 50,000 square feet) commercial buildings constitute about 95% of all commercial buildings in the U.S. These buildings typically do not have Building Automation Systems (BAS) to monitor and control building operation. While commercial BAS solutions exist, including those from Siemens, Honeywell, Johnsons Controls and many more, they are not cost effective in the context of small- and medium-sized commercial buildings, and typically work with specific controller products from the same company. BEMOSS targets small and medium-sized commercial buildings to address this gap.

  16. A identidade profissional no jornalismo open source

    Directory of Open Access Journals (Sweden)

    Ana Maria Brambilla

    2005-06-01

    Full Text Available Ao aprofundar o conceito de jornalismo open source e seus valores de aplicação na Internet, o presente artigo focaliza a preocupação despertada em jornalistas profissionais em um cenário onde cada cidadão é um repórter. Para ilustrar essa pesquisa foi estudado o noticiário coreano OhmyNews, online desde 2000, publicando artigos escritos por pessoas que não têm formação jornalística. A intenção desta reflexão é ampliar as discussões pela busca da reconfiguração do papel do jornalista em uma mídia que está cada vez mais sob domínio do público.

  17. Intrinsic Motivation in Open Source Software Development

    DEFF Research Database (Denmark)

    Bitzer, J.; W., Schrettl,; Schröder, Philipp

    2004-01-01

    of a public good, these features emerge quite naturally. We adapt a dynamic private-provision-of-public-goods model to reflects key aspects of the OSS phenomenon. In particular, instead of relying on extrinsic motives for programmers (e.g. signaling) the present model is driven by intrinsic motives of OSS...... programmers, such as user-programmers, play value or \\emph{homo ludens} payoff, and gift culture benefits. Such intrinsic motives feature extensively in the wider OSS literature and turn out to add new insights to the economic analysis.......This papers sheds light on the puzzling evidence that even though open source software (OSS) is a public good, it is developed for free by highly qualified, young and motivated individuals, and evolves at a rapid pace. We show that once OSS development is understood as the private provision...

  18. HERAFitter, Open Source QCD Fit Project

    CERN Document Server

    Alekhin, S; Belov, P; Borroni, S; Botje, M; Britzger, D; Camarda, S; Cooper-Sarkar, A M; Daum, K; Diaconu, C; Feltesse, J; Gizhko, A; Glazov, A; Guffanti, A; Guzzi, M; Hautmann, F; Jung, A; Jung, H; Kolesnikov, V; Kowalski, H; Kuprash, O; Kusina, A; Levonian, S; Lipka, K; Lobodzinski, B; Lohwasser, K; Luszczak, A; Malaescu, B; McNulty, R; Myronenko, V; Naumann-Emme, S; Nowak, K; Olness, F; Perez, E; Pirumov, H; Plačakytė, R; Rabbertz, K; Radescu, V; Sadykov, R; Salam, G P; Sapronov, A; Schöning, A; Schörner-Sadenius, T; Shushkevich, S; Slominski, W; Spiesberger, H; Starovoitov, P; Sutton, M; Tomaszewska, J; Turkot, O; Vargas, A; Watt, G; Wichmann, K

    2015-01-01

    HERAFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton and for many different kinds of analyses in Quantum Chromodynamics (QCD). It encodes results from a wide range of experimental measurements in lepton-proton deep inelastic scattering and proton-proton (proton-antiproton) collisions at hadron colliders. These are complemented with a variety of theoretical options for calculating PDF-dependent cross section predictions corresponding to the measurements. The framework covers a large number of the existing methods and schemes used for PDF determination. The data and theoretical predictions are brought together through numerous methodological options for carrying out PDF fits and plotting tools to help visualise the results. While primarily based on the approach of collinear factorisation, HERAFitter also provides facilities for fits of dipole models and transverse-momentum dependent PDFs. The package can be used to study t...

  19. An open source business model for malaria.

    Science.gov (United States)

    Årdal, Christine; Røttingen, John-Arne

    2015-01-01

    Greater investment is required in developing new drugs and vaccines against malaria in order to eradicate malaria. These precious funds must be carefully managed to achieve the greatest impact. We evaluate existing efforts to discover and develop new drugs and vaccines for malaria to determine how best malaria R&D can benefit from an enhanced open source approach and how such a business model may operate. We assess research articles, patents, clinical trials and conducted a smaller survey among malaria researchers. Our results demonstrate that the public and philanthropic sectors are financing and performing the majority of malaria drug/vaccine discovery and development, but are then restricting access through patents, 'closed' publications and hidden away physical specimens. This makes little sense since it is also the public and philanthropic sector that purchases the drugs and vaccines. We recommend that a more "open source" approach is taken by making the entire value chain more efficient through greater transparency which may lead to more extensive collaborations. This can, for example, be achieved by empowering an existing organization like the Medicines for Malaria Venture (MMV) to act as a clearing house for malaria-related data. The malaria researchers that we surveyed indicated that they would utilize such registry data to increase collaboration. Finally, we question the utility of publicly or philanthropically funded patents for malaria medicines, where little to no profits are available. Malaria R&D benefits from a publicly and philanthropically funded architecture, which starts with academic research institutions, product development partnerships, commercialization assistance through UNITAID and finally procurement through mechanisms like The Global Fund to Fight AIDS, Tuberculosis and Malaria and the U.S.' President's Malaria Initiative. We believe that a fresh look should be taken at the cost/benefit of patents particularly related to new malaria

  20. An open source business model for malaria.

    Directory of Open Access Journals (Sweden)

    Christine Årdal

    Full Text Available Greater investment is required in developing new drugs and vaccines against malaria in order to eradicate malaria. These precious funds must be carefully managed to achieve the greatest impact. We evaluate existing efforts to discover and develop new drugs and vaccines for malaria to determine how best malaria R&D can benefit from an enhanced open source approach and how such a business model may operate. We assess research articles, patents, clinical trials and conducted a smaller survey among malaria researchers. Our results demonstrate that the public and philanthropic sectors are financing and performing the majority of malaria drug/vaccine discovery and development, but are then restricting access through patents, 'closed' publications and hidden away physical specimens. This makes little sense since it is also the public and philanthropic sector that purchases the drugs and vaccines. We recommend that a more "open source" approach is taken by making the entire value chain more efficient through greater transparency which may lead to more extensive collaborations. This can, for example, be achieved by empowering an existing organization like the Medicines for Malaria Venture (MMV to act as a clearing house for malaria-related data. The malaria researchers that we surveyed indicated that they would utilize such registry data to increase collaboration. Finally, we question the utility of publicly or philanthropically funded patents for malaria medicines, where little to no profits are available. Malaria R&D benefits from a publicly and philanthropically funded architecture, which starts with academic research institutions, product development partnerships, commercialization assistance through UNITAID and finally procurement through mechanisms like The Global Fund to Fight AIDS, Tuberculosis and Malaria and the U.S.' President's Malaria Initiative. We believe that a fresh look should be taken at the cost/benefit of patents particularly related

  1. The Open Source Snowpack modelling ecosystem

    Science.gov (United States)

    Bavay, Mathias; Fierz, Charles; Egger, Thomas; Lehning, Michael

    2016-04-01

    As a large number of numerical snow models are available, a few stand out as quite mature and widespread. One such model is SNOWPACK, the Open Source model that is developed at the WSL Institute for Snow and Avalanche Research SLF. Over the years, various tools have been developed around SNOWPACK in order to expand its use or to integrate additional features. Today, the model is part of a whole ecosystem that has evolved to both offer seamless integration and high modularity so each tool can easily be used outside the ecosystem. Many of these Open Source tools experience their own, autonomous development and are successfully used in their own right in other models and applications. There is Alpine3D, the spatially distributed version of SNOWPACK, that forces it with terrain-corrected radiation fields and optionally with blowing and drifting snow. This model can be used on parallel systems (either with OpenMP or MPI) and has been used for applications ranging from climate change to reindeer herding. There is the MeteoIO pre-processing library that offers fully integrated data access, data filtering, data correction, data resampling and spatial interpolations. This library is now used by several other models and applications. There is the SnopViz snow profile visualization library and application that supports both measured and simulated snow profiles (relying on the CAAML standard) as well as time series. This JavaScript application can be used standalone without any internet connection or served on the web together with simulation results. There is the OSPER data platform effort with a data management service (build on the Global Sensor Network (GSN) platform) as well as a data documenting system (metadata management as a wiki). There are several distributed hydrological models for mountainous areas in ongoing development that require very little information about the soil structure based on the assumption that in step terrain, the most relevant information is

  2. The effects of listening to preferred music on pain intensity after open heart surgery

    OpenAIRE

    Jafari, Hedayat; Zeydi, Amir Emami; Khani, Soghra; Esmaeili, Ravanbakhsh; Soleimani, Aria

    2012-01-01

    Background: Pain is a common phenomenon after surgery. Cardiac surgeries are no exception and patients generally experience acute pain after these surgeries. Inadequate pain management after cardiac surgery predisposes patients to many complications. Therefore, the aim of this study was to determine the effects of listening to preferred music on pain intensity after open heart surgery. Materials and Methods: This study was a randomized clinical trial (RCT) conducted in open heart intensive ca...

  3. Awareness of Open Source Software (OSS: Promises, Reality and Future

    Directory of Open Access Journals (Sweden)

    Anil (Student of M.Tech.(CSE

    2011-10-01

    Full Text Available Open source is a development method for software that harnessesthe power of distributed peer review and transparency of process.The Open Source Initiative Approved License trademark andprogram creates a nexus of trust around which developers, users,corporations and governments can organize open sourcecooperation. The promise of open source is better quality, higherreliability, more flexibility, lower cost, and an end to predatoryvendor lock-in.

  4. The successes and challenges of open-source biopharmaceutical innovation.

    Science.gov (United States)

    Allarakhia, Minna

    2014-05-01

    Increasingly, open-source-based alliances seek to provide broad access to data, research-based tools, preclinical samples and downstream compounds. The challenge is how to create value from open-source biopharmaceutical innovation. This value creation may occur via transparency and usage of data across the biopharmaceutical value chain as stakeholders move dynamically between open source and open innovation. In this article, several examples are used to trace the evolution of biopharmaceutical open-source initiatives. The article specifically discusses the technological challenges associated with the integration and standardization of big data; the human capacity development challenges associated with skill development around big data usage; and the data-material access challenge associated with data and material access and usage rights, particularly as the boundary between open source and open innovation becomes more fluid. It is the author's opinion that the assessment of when and how value creation will occur, through open-source biopharmaceutical innovation, is paramount. The key is to determine the metrics of value creation and the necessary technological, educational and legal frameworks to support the downstream outcomes of now big data-based open-source initiatives. The continued focus on the early-stage value creation is not advisable. Instead, it would be more advisable to adopt an approach where stakeholders transform open-source initiatives into open-source discovery, crowdsourcing and open product development partnerships on the same platform.

  5. OpenMx: An Open Source Extended Structural Equation Modeling Framework

    Science.gov (United States)

    Boker, Steven; Neale, Michael; Maes, Hermine; Wilde, Michael; Spiegel, Michael; Brick, Timothy; Spies, Jeffrey; Estabrook, Ryne; Kenny, Sarah; Bates, Timothy; Mehta, Paras; Fox, John

    2011-01-01

    OpenMx is free, full-featured, open source, structural equation modeling (SEM) software. OpenMx runs within the "R" statistical programming environment on Windows, Mac OS-X, and Linux computers. The rationale for developing OpenMx is discussed along with the philosophy behind the user interface. The OpenMx data structures are…

  6. OpenMx: An Open Source Extended Structural Equation Modeling Framework

    Science.gov (United States)

    Boker, Steven; Neale, Michael; Maes, Hermine; Wilde, Michael; Spiegel, Michael; Brick, Timothy; Spies, Jeffrey; Estabrook, Ryne; Kenny, Sarah; Bates, Timothy; Mehta, Paras; Fox, John

    2011-01-01

    OpenMx is free, full-featured, open source, structural equation modeling (SEM) software. OpenMx runs within the "R" statistical programming environment on Windows, Mac OS-X, and Linux computers. The rationale for developing OpenMx is discussed along with the philosophy behind the user interface. The OpenMx data structures are…

  7. HERAFitter. Open source QCD fit project

    Energy Technology Data Exchange (ETDEWEB)

    Alekhin, S. [Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany); Institute for High Energy Physics, Protvino, Moscow Region (Russian Federation); Behnke, O.; Borroni, S.; Britzger, D.; Camarda, S.; Gizhko, A.; Glazov, A.; Guzzi, M.; Kowalski, H.; Kuprash, O.; Levonian, S.; Lipka, K.; Myronenko, V.; Naumann-Emme, S.; Pirumov, H.; Placakyte, R.; Radescu, V.; Schoerner-Sadenius, T.; Shushkevich, S.; Starovoitov, P.; Turkot, O.; Vargas, A.; Wichmann, K. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Belov, P. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); St. Petersburg State University, Department of Physics, St. Petersburg (Russian Federation); Botje, M. [Nikhef, Amsterdam (Netherlands); Cooper-Sarkar, A.M. [University of Oxford, Department of Physics, Oxford (United Kingdom); Daum, K. [Universitaet Wuppertal, Fachbereich C, Wuppertal (Germany); Universitaet Wuppertal, Rechenzentrum, Wuppertal (Germany); Diaconu, C. [Aix Marseille Universite, CNRS/IN2P3, CPPM UMR 7346, Marseille (France); Feltesse, J. [CEA, DSM/Irfu, CE-Saclay, Gif-sur-Yvette (France); Guffanti, A. [University of Copenhagen, Niels Bohr International Academy and Discovery Center, Niels Bohr Institute, Copenhagen (Denmark); Hautmann, F. [University of Southampton, School of Physics and Astronomy, Southampton (United Kingdom); Rutherford Appleton Laboratory, Chilton (United Kingdom); University of Oxford, Department of Theoretical Physics, Oxford (United Kingdom); Jung, A. [FERMILAB, Batavia, IL (United States); Jung, H. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Universiteit Antwerpen, Elementaire Deeltjes Fysica, Antwerp (Belgium); Kolesnikov, V.; Sadykov, R.; Sapronov, A. [Joint Institute for Nuclear Research (JINR), Dubna, Moscow Region (Russian Federation); Kusina, A.; Olness, F. [Southern Methodist University, Dallas, TX (United States); Lobodzinski, B. [Werner Heisenberg Institut, Max Planck Institut fuer Physik, Muenchen (Germany); Lohwasser, K. [Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); Luszczak, A. [T. Kosciuszko University of Technology, Krakow (Poland); Malaescu, B. [UPMC and Universite, Paris-Diderot and CNRS/IN2P3, Laboratoire de Physique Nucleaire et de Hautes Energies, Paris (France); McNulty, R. [University College Dublin, Dublin 4 (Ireland); Nowak, K. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); University of Oxford, Department of Physics, Oxford (United Kingdom); Perez, E. [CERN, European Organization for Nuclear Research, Geneva (Switzerland); Rabbertz, K. [Institut fuer Experimentelle Kernphysik, Karlsruhe (Germany); Salam, G.P. [CERN, PH-TH, Geneva 23 (Switzerland); Leave from LPTHE, CNRS UMR 7589, UPMC Univ. Paris 6, Paris (France); Schoening, A. [Universitaet Heidelberg, Physikalisches Institut, Heidelberg (Germany); Slominski, W. [Jagiellonian University, Institute of Physics, Krakow (Poland); Spiesberger, H. [Johannes-Gutenberg-Universitaet, PRISMA Cluster of Excellence, Institut fuer Physik (WA THEP), Mainz (Germany); Sutton, M. [University of Sussex, Department of Physics and Astronomy, Brighton (United Kingdom); Tomaszewska, J. [Warsaw University of Technology, Faculty of Physics, Warsaw (Poland); Watt, G. [Durham University, Institute for Particle Physics Phenomenology, Durham (United Kingdom)

    2015-07-15

    HERAFitter is an open-source package that provides a framework for the determination of the parton distribution functions (PDFs) of the proton and for many different kinds of analyses in Quantum Chromodynamics (QCD). It encodes results from a wide range of experimental measurements in lepton-proton deep inelastic scattering and proton-proton (proton-antiproton) collisions at hadron colliders. These are complemented with a variety of theoretical options for calculating PDF-dependent cross section predictions corresponding to the measurements. The framework covers a large number of the existing methods and schemes used for PDF determination. The data and theoretical predictions are brought together through numerous methodological options for carrying out PDF fits and plotting tools to help to visualise the results. While primarily based on the approach of collinear factorisation, HERAFitter also provides facilities for fits of dipole models and transverse-momentum dependent PDFs. The package can be used to study the impact of new precise measurements from hadron colliders. This paper describes the general structure of HERAFitter and its wide choice of options. (orig.)

  8. XNAT Central: Open sourcing imaging research data.

    Science.gov (United States)

    Herrick, Rick; Horton, William; Olsen, Timothy; McKay, Michael; Archie, Kevin A; Marcus, Daniel S

    2016-01-01

    XNAT Central is a publicly accessible medical imaging data repository based on the XNAT open-source imaging informatics platform. It hosts a wide variety of research imaging data sets. The primary motivation for creating XNAT Central was to provide a central repository to host and provide access to a wide variety of neuroimaging data. In this capacity, XNAT Central hosts a number of data sets from research labs and investigative efforts from around the world, including the OASIS Brains imaging studies, the NUSDAST study of schizophrenia, and more. Over time, XNAT Central has expanded to include imaging data from many different fields of research, including oncology, orthopedics, cardiology, and animal studies, but continues to emphasize neuroimaging data. Through the use of XNAT's DICOM metadata extraction capabilities, XNAT Central provides a searchable repository of imaging data that can be referenced by groups, labs, or individuals working in many different areas of research. The future development of XNAT Central will be geared towards greater ease of use as a reference library of heterogeneous neuroimaging data and associated synthetic data. It will also become a tool for making data available supporting published research and academic articles. Copyright © 2015 Elsevier Inc. All rights reserved.

  9. Closed-loop, open-source electrophysiology

    Directory of Open Access Journals (Sweden)

    John D Rolston

    2010-09-01

    Full Text Available Multiple extracellular microelectrodes (multi-electrode arrays, or MEAs effectively record rapidly varying neural signals, and can also be used for electrical stimulation. Multi-electrode recording can serve as artificial output (efferents from a neural system, while complex spatially and temporally targeted stimulation can serve as artificial input (afferents to the neuronal network. Multi-unit or local field potential recordings can not only be used to control real world artifacts, such as prostheses, computers or robots, but can also trigger or alter subsequent stimulation. Real-time feedback stimulation may serve to modulate or normalize aberrant neural activity, to induce plasticity, or to serve as artificial sensory input. Despite promising closed-loop applications, commercial electrophysiology systems do not yet take advantage of the bidirectional capabilities of multi-electrodes, especially for use in freely moving animals. We addressed this lack of tools for closing the loop with NeuroRighter, an open-source system including recording hardware, stimulation hardware, and control software with a graphical user interface. The integrated system is capable of multi-electrode recording and simultaneous patterned microstimulation triggered by recordings with minimal stimulation artifact. The potential applications of closed-loop systems as research tools and clinical treatments are broad; we provide one example where epileptic activity recorded by a multi-electrode probe is used to trigger targeted stimulation, via that probe, to freely moving rodents.

  10. An open-source laser electronics suite

    Science.gov (United States)

    Pisenti, Neal C.; Reschovsky, Benjamin J.; Barker, Daniel S.; Restelli, Alessandro; Campbell, Gretchen K.

    2016-05-01

    We present an integrated set of open-source electronics for controlling external-cavity diode lasers and other instruments in the laboratory. The complete package includes a low-noise circuit for driving high-voltage piezoelectric actuators, an ultra-stable current controller based on the design of, and a high-performance, multi-channel temperature controller capable of driving thermo-electric coolers or resistive heaters. Each circuit (with the exception of the temperature controller) is designed to fit in a Eurocard rack equipped with a low-noise linear power supply capable of driving up to 5 A at +/- 15 V. A custom backplane allows signals to be shared between modules, and a digital communication bus makes the entire rack addressable by external control software over TCP/IP. The modular architecture makes it easy for additional circuits to be designed and integrated with existing electronics, providing a low-cost, customizable alternative to commercial systems without sacrificing performance.

  11. Laparoendoscopic single-site retroperitoneoscopic adrenalectomy compared with conventional laparoscopy and open surgery

    Directory of Open Access Journals (Sweden)

    Szu-Han Chen

    2017-03-01

    Conclusion: The standard approach to adrenalectomy recently improved from open to laparoscopic surgery, transperitoneal to retroperitoneal access, and multiple ports to a single port. Here we found that laparoscopic surgery had better intra- and postoperative outcomes than open surgery. Furthermore, patients treated with LESS-RA required less postoperative recovery time and less analgesic use than those treated with CRA.

  12. REUSABILITY ASSESSMENT OF OPEN SOURCE COMPONENTS FOR SOFTWARE PRODUCT LINES

    OpenAIRE

    Fazal-e- Amin; Ahmad Kamil Mahmood; Alan Oxley

    2011-01-01

    Software product lines and open source software are two emerging paradigms in software engineering. A common theme in both of these paradigms is „reuse‟. Software product lines are a reuse centered approach that makes use of existing assets to develop new products. At the moment, a motivation for using open source software is so as to gain access to source code, which can then be reused. The product line community is being attracted to open source components. The use of open source softwa...

  13. The 2015 Bioinformatics Open Source Conference (BOSC 2015.

    Directory of Open Access Journals (Sweden)

    Nomi L Harris

    2016-02-01

    Full Text Available The Bioinformatics Open Source Conference (BOSC is organized by the Open Bioinformatics Foundation (OBF, a nonprofit group dedicated to promoting the practice and philosophy of open source software development and open science within the biological research community. Since its inception in 2000, BOSC has provided bioinformatics developers with a forum for communicating the results of their latest efforts to the wider research community. BOSC offers a focused environment for developers and users to interact and share ideas about standards; software development practices; practical techniques for solving bioinformatics problems; and approaches that promote open science and sharing of data, results, and software. BOSC is run as a two-day special interest group (SIG before the annual Intelligent Systems in Molecular Biology (ISMB conference. BOSC 2015 took place in Dublin, Ireland, and was attended by over 125 people, about half of whom were first-time attendees. Session topics included "Data Science;" "Standards and Interoperability;" "Open Science and Reproducibility;" "Translational Bioinformatics;" "Visualization;" and "Bioinformatics Open Source Project Updates". In addition to two keynote talks and dozens of shorter talks chosen from submitted abstracts, BOSC 2015 included a panel, titled "Open Source, Open Door: Increasing Diversity in the Bioinformatics Open Source Community," that provided an opportunity for open discussion about ways to increase the diversity of participants in BOSC in particular, and in open source bioinformatics in general. The complete program of BOSC 2015 is available online at http://www.open-bio.org/wiki/BOSC_2015_Schedule.

  14. Open source engineering and sustainability tools for the built environment

    NARCIS (Netherlands)

    Coenders, J.L.

    2013-01-01

    This paper presents two novel open source software developments for design and engineering in the built environment. The first development, called “sustainability-open” [1], aims on providing open source design, analysis and assessment software source code for (environmental) performance of building

  15. Open source engineering and sustainability tools for the built environment

    NARCIS (Netherlands)

    Coenders, J.L.

    2013-01-01

    This paper presents two novel open source software developments for design and engineering in the built environment. The first development, called “sustainability-open” [1], aims on providing open source design, analysis and assessment software source code for (environmental) performance of

  16. [Spontaneous epidural hematoma after open heart surgery: case report].

    Science.gov (United States)

    Anegawa, S; Hayashi, T; Furukawa, Y; Nagashima, T; Kumate, M

    1999-11-01

    Acute epidural hematoma not associated with head injury is rarely encountered and is known as spontaneous epidural hematoma. To our knowledge, only five cases with epidural hematoma after open-heart surgery have been published. Pathogenesis and preventive measures have not yet been determined. We report a case of such spontaneous epidural hematoma and consider the possible pathogenesis. A 12-year-old female received a radical operation for severe subaortic stenosis. The intraoperative course was uneventful except for massive hemorrhage which was adequately controlled. Postoperatively, she was moved to the CCU still not having aroused from anesthesia. Eleven hours later, it was found that her pupils were fixed and dilated. CT scan demonstrated a huge bifrontal epidural hematoma with disappearance of the basal cistern. Even though immediate emergency evacuation was performed, the patient died of acute brain swelling four days after the operation.

  17. Outcome of Anesthesia and Open Heart Surgery in Pregnant Patients

    Directory of Open Access Journals (Sweden)

    Golamali Mollasadeghi

    2007-06-01

    Full Text Available Background: Cardiovascular disease is an important non-obstetric cause of maternal and fetal /neonatal morbidity and mortality during pregnancy. For a pregnant woman with cardiac disease, the potential inability of the maternal cardiovascular system to contend with normal pregnancy-induced physiologic changes may produce deleterious effects on both mother and fetus. To determine the most frequent surgical indications of maternal and fetal mortality, we studied 15 cases of severe cardiac disease in pregnant women who required cardiac surgical procedures. Methods: In this descriptive study, fifteen pregnant women who underwent cardiac surgery were studied. Maternal age ranged from 27 to 36 years, and gestational age varied from 4 to 22 weeks. Most of the patients were in New York Heart Association Classes II and III. Opioid- based anesthesia with fentanyl citrate (50µ/kg or sufentanil (5µ/kg plus low dose of thiopental were used for the induction of anesthesia. During non-pulsatile cardio-pulmonary bypass, core temperature was between 28-36 °C, average CBP time was 61.2±22 min, average aortic cross-clamp time was 34.13±14 min, and mean pump pressure was maintained between 65-80 mmHg. Results: Ten patients had severe mitral valve disease (66.6%, three had aortic valve disease (20%, one had subvalvular aortic stenosis (6.7%, and the remaining one had left atrial myxoma (6.7%. There were five fetal deaths (33.3% and one maternal death (6.7%. Conclusion: It seems that open heart surgery in the first trimester is very hazardous for the fetus and may lead to fetal death. If possible, surgery should be carried out in the second trimester of pregnancy. The recommendations are simply guidelines because research data and clinical experience in this area are limited.

  18. Surgical Measures to Reduce Infection in Open Colorectal Surgery

    African Journals Online (AJOL)

    dell

    than 20% for emergency surgery and 5% for elective surgery for cancer; an ... 4% for colonic resection, and wound infection rates after surgery for colorectal cancer should be ..... obesity, jaundice etc) and post operative wound infection53.

  19. The GPS Toolkit: Open Source Clock Tools

    Science.gov (United States)

    2008-12-01

    gnuplot . ALLANPLOT (allanplot) allanplot is a Python plotting script. The script opens an interface that allows the user to view the plot and a...Allan deviation. The script opens a gnuplot window with the input data plotted. The x, y, and z axis are plotted logarithmically, with x and y

  20. Validation of colorectal cancer surgery data from administrative data sources

    Directory of Open Access Journals (Sweden)

    Li Xue

    2012-07-01

    Full Text Available Abstract Background Surgery is the primary treatment for colorectal cancer for both curative and palliative intent. Availability of high quality surgery data is essential for assessing many aspects of the quality of colorectal cancer care. The objective of this study was to determine the quality of different administrative data sources in identifying surgery for colorectal cancer with respect to completeness and accuracy. Methods All residents in Alberta, Canada who were diagnosed with invasive colorectal cancer in years 2000-2005 were identified from the Alberta Cancer Registry and included in the study. Surgery data for these patients were obtained from the Cancer Registry (which collects the date of surgery for which the primary tumor was removed and compared to surgery data obtained from two different administrative data sources: Physician Billing and Hospital Inpatient data. Sensitivity, specificity, positive predictive value, negative predictive value and observed agreement were calculated compared to the Cancer Registry data. Results The Physician Billing data alone or combined with Hospital Inpatient data demonstrated equally high sensitivity (97% for both and observed agreement with the Cancer Registry data (93% for both for identifying surgeries. The Hospital Inpatient data, however, had the highest specificity (80%. The positive predictive value varied by disease stage and across data sources for stage IV (99% for stages I-III and 83-89% for stage IV, the specificity is better for colon cancer surgeries (72-85% than for rectal cancer surgeries (60-73%; validation measures did not vary over time. Conclusion Physician Billing data identify the colorectal cancer surgery more completely than Hospital Inpatient data although both sources have a high level of completeness.

  1. How Open Source Has Changed the Software Industry: Perspectives from Open Source Entrepreneurs

    Directory of Open Access Journals (Sweden)

    Risto Rajala

    2012-01-01

    Full Text Available The emergence of F/LOSS (free/libre open source software has triggered several changes in the software industry. F/LOSS has been cited as an archetypal form of open innovation; it consists of the convergence and collaboration of like-minded parties. An increasing number of software firms have taken upon this approach to link outsiders into their service development and product design. Also, software firms have been increasingly grounded their business models on user-centric and service-oriented operations. This article describes a study that investigates these changes from the perspective of F/LOSS entrepreneurs. The findings are summarized into four issues that are critical in managing an F/LOSS business: i dealing with organizational changes in the innovation process; ii mastering user involvement; iii successfully using resources; and iv designing revenue models.

  2. Quality of life after laparoscopic and open colorectal surgery: A systematic review

    Institute of Scientific and Technical Information of China (English)

    Sanne; AL; Bartels; Malaika; S; Vlug; Dirk; T; Ubbink; Willem; A; Bemelman

    2010-01-01

    This study was a systematic review of the available evidence on quality of life in patients after laparoscopic or open colorectal surgery. A systematic review was performed of all randomized clinical trials (RCTs) that compared laparoscopic with open colorectal surgery. Study selection, quality assessment and data extraction were carried out independently by two reviewers. Primary endpoint was quality of life after laparoscopic and open colorectal surgery, as assessed by validated questionnaires. The search...

  3. Open-Source Data and the Study of Homicide.

    Science.gov (United States)

    Parkin, William S; Gruenewald, Jeff

    2015-07-20

    To date, no discussion has taken place in the social sciences as to the appropriateness of using open-source data to augment, or replace, official data sources in homicide research. The purpose of this article is to examine whether open-source data have the potential to be used as a valid and reliable data source in testing theory and studying homicide. Official and open-source homicide data were collected as a case study in a single jurisdiction over a 1-year period. The data sets were compared to determine whether open-sources could recreate the population of homicides and variable responses collected in official data. Open-source data were able to replicate the population of homicides identified in the official data. Also, for every variable measured, the open-sources captured as much, or more, of the information presented in the official data. Also, variables not available in official data, but potentially useful for testing theory, were identified in open-sources. The results of the case study show that open-source data are potentially as effective as official data in identifying individual- and situational-level characteristics, provide access to variables not found in official homicide data, and offer geographic data that can be used to link macro-level characteristics to homicide events.

  4. Impact of established skills in open surgery on the proficiency gain process for laparoscopic surgery.

    Science.gov (United States)

    Brown, Daniel C; Miskovic, Danilo; Tang, Benjie; Hanna, George B

    2010-06-01

    Laparoscopic training traditionally follows open surgical training. This study aimed to investigate the impact of experience in open surgery on the laparoscopic proficiency gain process. A survey form investigating the importance of open experience before the start of laparoscopic training was sent to surgical experts and trainees in the United Kingdom. A separate experimental study objectively assessed the effects of open experience on laparoscopic skill acquisition using a virtual reality simulator. In the study, 11 medical students with no prior surgical experience (group A) and 14 surgical trainees with open but no laparoscopic experience in (group B) performed 250 simulated laparoscopic cholecystectomies. Psychomotor skills were evaluated by motion analysis and video-based global rating scores. Before the first and after the fifth and tenth operation, knowledge of laparoscopic techniques was assessed by a written test and by self-reported confidence levels indicated on a questionnaire. The 80 experts and 282 trainees who responded to the survey believed prior open experience aids confidence levels, knowledge, and skills acquisition. In the simulation study, no intergroup difference was found for any parameter after the first procedure. Group B scored significantly higher in the laparoscopic knowledge test before training began (42.7% vs. 64.3%; p = 0.002), but no significant difference was found after five operations. The two groups did not differ significantly in terms of confidence. Group B had a significantly shorter total operation time only at the first operation (2,305.6 s vs. 1,884.6 s; p = 0.037). No significant intergroup difference in path length, number of movements, or video-based global rating scores was observed. Prior open experience does not aid the laparoscopic learning process, as demonstrated in a simulated setting. Given the wealth of evidence demonstrating translation of virtual skills to the operating theater, we propose that the safe and

  5. Performances evaluation of different open source

    Directory of Open Access Journals (Sweden)

    Arun Patel

    2016-06-01

    Full Text Available In Open sources DEMs such as SRTM, ASTER and Cartosat-1, various factors affecting the accuracy of satellite based DEM such as errors during data collection, systematic errors and unknown errors that are geographically dependent on terrain conditions cannot be avoided. For these reasons it is very necessary to check and compare the performances and validation of the above mentioned different satellite based DEMs. Accuracy assessment of these DEM has been done using DGPS points. For these points proper interpolation of the surface was developed using different interpolation techniques. For the generation of the surface the first step was converting the satellite based DEMs height into linear interpolation contour maps of 1 m interval. Then came selecting random sample points on the contour line and generating the interpolated surface using different interpolation techniques such as IDW, GPI, RBF, OK and UK, LPI, TR and BI, which are commonly used in geomorphology research. This interpolated surface helps in proper representation of the terrain and was checked under different terrain surfaces. For validation of DGPS points the height was taken for ground control points and standard statistical tests such as ME and RMSE were applied. From above investigation, it is reveals that above mention DEMs which are used for study. Cartosat-1 (30 m data product is better than SRTM (90 m and ASTER (30 m because it had produced low RMSE of 3.49 m without applying the interpolation method. Investigation also reveals after applying the interpolation techniques on this data error can be reduced. In the case of Cartosat-1 and SRTM, low RMSE and ME were produced by the BI method, where Cartosat-1 DEM had an RMSE of 3.36 m with ME of −2.74 m, respectively. But in this case, RMSE and ME of SRTM is 2.73 m and −0.36 m, respectively. BI is designed for image processing and can be used for imagery were a maximum height variation in satellite DEM and terrain

  6. Beyond Open Source Software: Solving Common Library Problems Using the Open Source Hardware Arduino Platform

    Directory of Open Access Journals (Sweden)

    Jonathan Younker

    2013-06-01

    Full Text Available Using open source hardware platforms like the Arduino, libraries have the ability to quickly and inexpensively prototype custom hardware solutions to common library problems. The authors present the Arduino environment, what it is, what it does, and how it was used at the James A. Gibson Library at Brock University to create a production portable barcode-scanning utility for in-house use statistics collection as well as a prototype for a service desk statistics tabulation program’s hardware interface.

  7. Autotransfusion of shed mediastinal blood after open heart surgery

    Institute of Scientific and Technical Information of China (English)

    赵康丽; 许建屏; 胡盛寿; 吴清玉; 魏以桢; 刘迎龙

    2003-01-01

    Objective To determine the safety and effectiveness of autotransfusion of shed mediastinal blood after open heart surgery. Methods Sixty patients undergoing coronary artery bypass grafting (CABG) were selected randomly to receive either nonwashed shed mediastinal blood (Group 1, n=30) or banked blood (Group 2, n=30). Drainage and transfusion volume were determined after the operation. Hb, RBC, HCT and PLT were detected immediately before and after the operation, as well as 24 hours and 7 days after the operation. Data were analyzed using Fisher's exact test. A P0.05). In the two groups, no significant difference in the mean blood loss was observed during 24 hours after the operation (660±300 ml in Group 1 and 655±280 ml in Group 2, P>0.05). In Group 1, the mean volume autotransfused was 280±160 ml, and the patients required 360±80 ml banked blood compared with 660±120 ml in Group 2. In other words, the banked blood requirement in Group 1 was 40% lower. Conclusions Autotransfusion of shed mediastinal blood after an open heart operation is safe and effective.

  8. Short- and long-term outcomes of laparoscopic surgery vs open surgery for transverse colon cancer: a retrospective multicenter study

    Directory of Open Access Journals (Sweden)

    Kim JW

    2016-04-01

    Full Text Available Jong Wan Kim,1 Jeong Yeon Kim,1 Byung Mo Kang,2 Bong Hwa Lee,3 Byung Chun Kim,4 Jun Ho Park5 1Department of Surgery, Dongtan Sacred Heart Hospital, College of Medicine, Hallym University, Hwaseong Si, 2Department of Surgery, Chuncheon Sacred Heart Hospital, College of Medicine, Hallym University, Chuncheon Si, 3Department of Surgery, Hallym Sacred Heart Hospital, College of Medicine, Hallym University, Anyang Si, 4Department of Surgery, Kangnam Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, 5Department of Surgery, Kangdong Sacred Heart Hospital, College of Medicine, Hallym University, Seoul, Republic of Korea Purpose: The purpose of the present study was to compare the perioperative and oncologic outcomes between laparoscopic surgery and open surgery for transverse colon cancer.Patients and methods: We conducted a retrospective review of patients who underwent surgery for transverse colon cancer at six Hallym University-affiliated hospitals between January 2005 and June 2015. The perioperative outcomes and oncologic outcomes were compared between laparoscopic and open surgery.Results: Of 226 patients with transverse colon cancer, 103 underwent laparoscopic surgery and 123 underwent open surgery. There were no differences in the patient characteristics between the two groups. Regarding perioperative outcomes, the operation time was significantly longer in the laparoscopic group than in the open group (267.3 vs 172.7 minutes, P<0.001, but the time to soft food intake (6.0 vs 6.6 days, P=0.036 and the postoperative hospital stay (13.7 vs 15.7 days, P=0.018 were shorter in the laparoscopic group. The number of harvested lymph nodes was lower in the laparoscopic group than in the open group (20.3 vs 24.3, P<0.001. The 5-year overall survival (90.8% vs 88.6%, P=0.540 and disease-free survival (86.1% vs 78.9%, P=0.201 rates were similar in both groups.Conclusion: The present study showed that laparoscopic surgery is associated

  9. A Survey of Open Source Tools for Business Intelligence

    DEFF Research Database (Denmark)

    Thomsen, Christian; Pedersen, Torben Bach

    2009-01-01

    The industrial use of open source Business Intelligence (BI) tools is becoming more common, but is still not as widespread as for other types of software. It is therefore of interest to explore which possibilities are available for open source BI and compare the tools. In this survey paper, we...

  10. How Hard Can It Be? : Developing in Open Source

    Directory of Open Access Journals (Sweden)

    Rosalie Blake

    2009-06-01

    Full Text Available In 2000 a small public library system in New Zealand developed and released Koha, the world’s first open source library management system. This is the story of how that came to pass and why, and of the lessons learnt in their first foray into developing in open source.

  11. Open Source Initiative Powers Real-Time Data Streams

    Science.gov (United States)

    2014-01-01

    Under an SBIR contract with Dryden Flight Research Center, Creare Inc. developed a data collection tool called the Ring Buffered Network Bus. The technology has now been released under an open source license and is hosted by the Open Source DataTurbine Initiative. DataTurbine allows anyone to stream live data from sensors, labs, cameras, ocean buoys, cell phones, and more.

  12. Evaluation and Customization of Different Open Source Desktop GIS Software

    Institute of Scientific and Technical Information of China (English)

    QIU Ruqiong; LI Bing

    2012-01-01

    This paper gave a general evaluation on existing three popular free and open source desktop GIS projects,according to the selected evaluation criteria.To further the understanding of the open source software,this paper also presented a customization example of QGIS with python and PyQT.

  13. Integrating an Automatic Judge into an Open Source LMS

    Science.gov (United States)

    Georgouli, Katerina; Guerreiro, Pedro

    2011-01-01

    This paper presents the successful integration of the evaluation engine of Mooshak into the open source learning management system Claroline. Mooshak is an open source online automatic judge that has been used for international and national programming competitions. although it was originally designed for programming competitions, Mooshak has also…

  14. Migrations of the Mind: The Emergence of Open Source Education

    Science.gov (United States)

    Glassman, Michael; Bartholomew, Mitchell; Jones, Travis

    2011-01-01

    The authors describe an Open Source approach to education. They define Open Source Education (OSE) as a teaching and learning framework where the use and presentation of information is non-hierarchical, malleable, and subject to the needs and contributions of students as they become "co-owners" of the course. The course transforms itself into an…

  15. Open Source Library Management Systems: A Multidimensional Evaluation

    Science.gov (United States)

    Balnaves, Edmund

    2008-01-01

    Open source library management systems have improved steadily in the last five years. They now present a credible option for small to medium libraries and library networks. An approach to their evaluation is proposed that takes account of three additional dimensions that only open source can offer: the developer and support community, the source…

  16. Open Source Communities in Technical Writing: Local Exigence, Global Extensibility

    Science.gov (United States)

    Conner, Trey; Gresham, Morgan; McCracken, Jill

    2011-01-01

    By offering open-source software (OSS)-based networks as an affordable technology alternative, we partnered with a nonprofit community organization. In this article, we narrate the client-based experiences of this partnership, highlighting the ways in which OSS and open-source culture (OSC) transformed our students' and our own expectations of…

  17. Open Source Library Management Systems: A Multidimensional Evaluation

    Science.gov (United States)

    Balnaves, Edmund

    2008-01-01

    Open source library management systems have improved steadily in the last five years. They now present a credible option for small to medium libraries and library networks. An approach to their evaluation is proposed that takes account of three additional dimensions that only open source can offer: the developer and support community, the source…

  18. BOOK REVIEW: The Success of Open Source by Steven Weber

    Directory of Open Access Journals (Sweden)

    Eric Lease Morgan

    2007-12-01

    Full Text Available The Success of Open Source by Steven Weber details the history, process, motivations, and possible long-term effects of open source software (OSS. Weber’s book can be used as a set of guidelines – a description of a framework – for building software solutions for the computing problems facing libraries.

  19. Open source system options for librarians and archivists

    CERN Document Server

    Tomer, Christinger

    2017-01-01

    The importance of open source systems in the context of libraries and archives is perhaps greater now than ever before. This book explains the essentials of open source systems to benefit academic and public librarians and archivists who have a vested interest in the future of integrated online library systems. Author Christinger Tomer, who has studied open source systems for more than two decades and used them extensively in both teaching and consulting, provides brief histories of both library automation and open source software, in the latter instance focusing on aspects that have more directly influenced library and archival computing. He then describes and analyzes key open source systems and critically compares them to commercial systems in terms of design, functionality, and ease of administration. The book concludes with an in-depth description of how these systems are currently being employed as well as insightful predictions about how this segment of the software environment is likely to evolve.

  20. Open source software and minority languages: a priceless opportunity

    Directory of Open Access Journals (Sweden)

    Jordi Mas

    2003-04-01

    Full Text Available Open source software is a form of software that gives its users freedom. With the advent of the Internet, open source software has consolidated as a technically viable, financially sustainable alternative to proprietary software. Languages such as Breton, Galician, Gaelic and Catalan have seen very little development in the world of proprietary software because of the limitations imposed. In contrast, in the world of open source software these languages have been developed with notable success. Open source projects of the importance of the Mozilla browser, the GNOME environment and the GNU/Linux system have complete or partial translations in all these languages. Open source software presents an unprecedented opportunity for the development of minority languages, such as Catalan, in new technologies thanks to the freedom that they guarantee us.

  1. Institutional and pedagogical criteria for productive open source learning environments

    DEFF Research Database (Denmark)

    Svendsen, Brian Møller; Ryberg, Thomas; Semey, Ian Peter;

    2004-01-01

    In this article we present some institutional and pedagogical criteria for making an informed decision in relation to identifying and choosing a productive open source learning environment. We argue that three concepts (implementation, maintainability and further development) are important when...... considering the sustainability and cost efficiency of an open source system, and we outline a set of key points for evaluating an open source software in terms of cost of system adoption. Furthermore we identify a range of pedagogical concepts and criteria to emphasize the importance of considering...... the relation between the local pedagogical practice and the pedagogical design of the open source learning environment. This we illustrate through an analysis of an open source system and our own pedagogical practice at Aalborg University, Denmark (POPP)....

  2. Institutional and pedagogical criteria for productive open source learning environments

    DEFF Research Database (Denmark)

    Svendsen, Brian Møller; Ryberg, Thomas; Semey, Ian Peter

    2004-01-01

    In this article we present some institutional and pedagogical criteria for making an informed decision in relation to identifying and choosing a productive open source learning environment. We argue that three concepts (implementation, maintainability and further development) are important when...... considering the sustainability and cost efficiency of an open source system, and we outline a set of key points for evaluating an open source software in terms of cost of system adoption. Furthermore we identify a range of pedagogical concepts and criteria to emphasize the importance of considering...... the relation between the local pedagogical practice and the pedagogical design of the open source learning environment. This we illustrate through an analysis of an open source system and our own pedagogical practice at Aalborg University, Denmark (POPP)....

  3. Open source software and minority languages: a priceless opportunity

    Directory of Open Access Journals (Sweden)

    Jordi Mas

    2003-04-01

    Full Text Available Open source software is a form of software that gives its users freedom. With the advent of the Internet, open source software has consolidated as a technically viable, financially sustainable alternative to proprietary software. Languages such as Breton, Galician, Gaelic and Catalan have seen very little development in the world of proprietary software because of the limitations imposed. In contrast, in the world of open source software these languages have been developed with notable success. Open source projects of the importance of the Mozilla browser, the GNOME environment and the GNU/Linux system have complete or partial translations in all these languages. Open source software presents an unprecedented opportunity for the development of minority languages, such as Catalan, in new technologies thanks to the freedom that they guarantee us.

  4. Research on OpenStack of open source cloud computing in colleges and universities’ computer room

    Science.gov (United States)

    Wang, Lei; Zhang, Dandan

    2017-06-01

    In recent years, the cloud computing technology has a rapid development, especially open source cloud computing. Open source cloud computing has attracted a large number of user groups by the advantages of open source and low cost, have now become a large-scale promotion and application. In this paper, firstly we briefly introduced the main functions and architecture of the open source cloud computing OpenStack tools, and then discussed deeply the core problems of computer labs in colleges and universities. Combining with this research, it is not that the specific application and deployment of university computer rooms with OpenStack tool. The experimental results show that the application of OpenStack tool can efficiently and conveniently deploy cloud of university computer room, and its performance is stable and the functional value is good.

  5. Open source project to aid ionosphere physics research

    Science.gov (United States)

    Huba, J. D.; Joyce, G.

    In the past decade, the Open Source Model for software development has gained popularity and has had many major achievements: emacs, Linux, the Gimp, and Python, to name a few. The basic idea is to provide the source code of the model or application, a tutorial on its use, and a feedback mechanism with the community so that the model can be tested, improved, and archived. Given the success of the Open Source Model, it may prove valuable in the development of scientific research codes. With this in mind, we are "open sourcing" the SAMI2 low- to mid-latitude ionospheric model that was recently developed at the Naval Research Laboratory.

  6. The aching surgeon: a survey of physical discomfort and symptoms following open, laparoscopic, and robotic surgery.

    Science.gov (United States)

    Plerhoples, Timothy A; Hernandez-Boussard, Tina; Wren, Sherry M

    2012-03-01

    There is increasing interest in understanding the toll that operating takes on a surgeon's body. The effect of robotic surgery on surgeon discomfort has not been studied. We sought to document the discomfort of robotic surgery compared with open and laparoscopic surgery and to investigate the factors that affect the risk of physical symptoms. Nineteen-thousand eight-hundred and sixty-eight surgeons from all specialties trained in the use of robots were sent a 26-question online survey and 1,407 responded. One-thousand two-hundred and fifteen surgeons who practiced all three approaches were used in the analysis. Eight-hundred and seventy-one surgeons had physical discomfort or symptoms attributable to operating. Of those with symptoms, 55.4% attributed most of the symptoms to laparoscopic surgery, 36.3% to open surgery, and 8.3% to robotic surgery. A higher case load was predictive of increased symptoms for open and laparoscopic surgery, but not for robotic surgery. Robotic surgery was less likely than open or laparoscopic surgery to lead to neck, back, hip, knee, ankle, foot, and shoulder pain and less likely than laparoscopic surgery to lead to elbow and wrist pain. Robotic surgery was more likely than either open or laparoscopic surgery to lead to eye pain, and more likely than open surgery to lead to finger pain. Nearly a third (30.3%) of surgeons admit to giving consideration to their own discomfort when choosing an operative modality. Robotic surgery has promise in reducing the risk of physical discomfort for the operator. This is important as more surgeons consider their own health when choosing a surgical modality.

  7. Meteorological Error Budget Using Open Source Data

    Science.gov (United States)

    2016-09-01

    VBA ) script was created that would read the model - based output and corresponding sounding data for each message type (METCM or METB3), output type...produce artillery MET error budget tables that account for expected errors when using MET model -based systems. Representatives of the US and other...nations within the North Atlantic Treaty Organization expressed a need for shareable model -based MET error budgets. Use of an openly available civilian

  8. Open surgery for chronic limb ischemia: a review.

    Science.gov (United States)

    Ricco, J B; Thanh Phong, L; Belmonte, R; Schneider, F; Valagier, A; Illuminati, G; Regnault De La Mothe, G

    2013-12-01

    This review considers the role of the different revascularization strategies in patients with chronic limb ischemia (CLI) and reveals that clinical evidence guiding therapeutic decision-making in CLI is poor and only careful basic recommendations can be made. For diffuse aortoiliac disease with occlusion of the aorta, aortobifemoral bypass remains the best option if the patient is fit for open surgery. Unilateral iliac occlusion should be treated by primary stenting, but an iliofemoral bypass may be the best option when the disease extends down to the common and deep femoral arteries. For infrainguinal revascularisation, bypass using the saphenous vein remains the best option for patients with occlusion of the superficial femoral artery >25 cm and for patients with multiple occlusions of the infrapopliteal arteries. In the absence of leg veins, arm veins should be used. Prosthetic grafts are the last option. Endovascular techniques are recommended in patients with short arterial lesions and limited life expectancy <2 years. Finally some patients with CLI are best treated by primary amputation. In conclusion, this review demonstrates that neither an endo- first nor a bypass-first attitude is appropriate in patients with CLI and suggests that these patients should be cared for by specialists in a multidisciplinary center in order to preserve their life and limbs, to conduct clinical trials and to control costs.

  9. Multi-organ protection during open heart surgery

    Institute of Scientific and Technical Information of China (English)

    万松; 严秉泉

    2001-01-01

    Purpose and Methods Open-heart surgery with the use of cardiopulmonary bypass (CPB) is associated with an inflammatory cascade which contributes to the development of postoperative complications including multiple organ failure. To provide an update on the subject, we briefly review the recent English-language literature. Results During CPB, various factors have been recognized to induce a complex inflammatory response. Based on an enhanced understanding of the underlying mechanisms, therapeutic strategies have been developed to reduce this inflammatory reaction and its subsequent damaging effects. Off-pump coronary artery bypass grafting may result in less inflammatory injury as compared with the conventional maneuver, which can in turn, diminish the incidence of cardiac, renal, or neurological dysfunction. It is also clear that improving the biocompatibility of CPB materials can lead to a better patient recovery. Inasmuch as the pathophysiology involved appears to be multifactorial, it is unlikely that a single intervention could achieve the desired goal. Both pharmacologic strategies, such as steroid pretreatment, and modification of mechanical devices, such as the use of heparin-coated CPB circuits, could have important clinical implications. The balance between pro- and anti-inflammatory responses may be crucial in limiting the extent of inflammatory injury. Conclusions To date, the concept of organ protection should no longer be limited to the individual organ. Instead, investigations must be extended to focus on a systemic level.

  10. Quality of life after laparoscopic and open colorectal surgery: A systematic review

    NARCIS (Netherlands)

    Bartels, S.A.; Vlug, M.S.; Ubbink, D.T.; Bemelman, W.A.

    2010-01-01

    This study was a systematic review of the available evidence on quality of life in patients after laparoscopic or open colorectal surgery. A systematic review was performed of all randomized clinical trials (RCTs) that compared laparoscopic with open colorectal surgery. Study selection, quality

  11. OpenSesame : An open-source, graphical experiment builder for the social sciences

    NARCIS (Netherlands)

    Mathot, Sebastiaan; Schreij, Daniel; Theeuwes, Jan

    2012-01-01

    In the present article, we introduce OpenSesame, a graphical experiment builder for the social sciences. OpenSesame is free, open-source, and cross-platform. It features a comprehensive and intuitive graphical user interface and supports Python scripting for complex tasks. Additional functionality,

  12. Investigating Advances in the Acquisition of Systems Based on Open Architecture and Open Source Software

    Science.gov (United States)

    2011-08-01

    Copyright 2003-2008 Rodrigo B. Oliveira 4. UnityScript, Copyright 2005-2008 Rodrigo B. Oliveira 5. OpenAL cross platform audio library, Copyright...not know. ACM Computing Surveys, (in press). [5] Hauge, O., Ayala , C. and Conradi, R. (2010). Adoption of Open Source Software in Software- Intensive

  13. OpenBook WordPress Plugin: Open Source Access to Bibliographic Data

    Directory of Open Access Journals (Sweden)

    John Miedema

    2008-09-01

    Full Text Available OpenBook is a WordPress PHP plugin that implements the Open Library APIs to insert book covers, titles, authors and publishers into web pages. The motive behind the development was to provide an easy alternative to the common practice of linking to Amazon. Open Library was selected as a data source because it is both open source and open data.The plugin is useful for book reviewers, library webmasters, anyone who wants to put book covers and data on their WordPress blog or website. The plugin also allows users to add links to publisher websites, a feature that was considered significant to independent publishers.

  14. Code Forking, Governance, and Sustainability in Open Source Software

    Directory of Open Access Journals (Sweden)

    Juho Lindman

    2013-01-01

    Full Text Available The right to fork open source code is at the core of open source licensing. All open source licenses grant the right to fork their code, that is to start a new development effort using an existing code as its base. Thus, code forking represents the single greatest tool available for guaranteeing sustainability in open source software. In addition to bolstering program sustainability, code forking directly affects the governance of open source initiatives. Forking, and even the mere possibility of forking code, affects the governance and sustainability of open source initiatives on three distinct levels: software, community, and ecosystem. On the software level, the right to fork makes planned obsolescence, versioning, vendor lock-in, end-of-support issues, and similar initiatives all but impossible to implement. On the community level, forking impacts both sustainability and governance through the power it grants the community to safeguard against unfavourable actions by corporations or project leaders. On the business-ecosystem level forking can serve as a catalyst for innovation while simultaneously promoting better quality software through natural selection. Thus, forking helps keep open source initiatives relevant and presents opportunities for the development and commercialization of current and abandoned programs.

  15. Guidelines for the implementation of an open source information system

    Energy Technology Data Exchange (ETDEWEB)

    Doak, J.; Howell, J.A.

    1995-08-01

    This work was initially performed for the International Atomic Energy Agency (IAEA) to help with the Open Source Task of the 93 + 2 Initiative; however, the information should be of interest to anyone working with open sources. The authors cover all aspects of an open source information system (OSIS) including, for example, identifying relevant sources, understanding copyright issues, and making information available to analysts. They foresee this document as a reference point that implementors of a system could augment for their particular needs. The primary organization of this document focuses on specific aspects, or components, of an OSIS; they describe each component and often make specific recommendations for its implementation. This document also contains a section discussing the process of collecting open source data and a section containing miscellaneous information. The appendix contains a listing of various providers, producers, and databases that the authors have come across in their research.

  16. Setting up of an Open Source based Private Cloud

    Directory of Open Access Journals (Sweden)

    G R Karpagam

    2011-05-01

    Full Text Available Cloud Computing is an attractive concept in IT field, since it allows the resources to be provisioned according to the user needs[11]. It provides services on virtual machines whereby the user can share resources, software and other devices on demand. Cloud services are supported both by Proprietary and Open Source Systems. As Proprietary products are very expensive, customers are not allowed to experiment on their product and security is a major issue in it, Open source systems helps in solving out these problems. Cloud Computing motivated many academic and non academic members to develop Open Source Cloud Setup, here the users are allowed to study the source code and experiment it. This paper describes the configuration of a private cloud using Eucalyptus. Eucalyptus an open source system has been used to implement a private cloud using the hardware and software without making any modification to it and provide various types of services to the cloud computing environment

  17. IPMACC: Open Source OpenACC to CUDA/OpenCL Translator

    OpenAIRE

    Lashgar, Ahmad; Majidi, Alireza; Baniasadi, Amirali

    2014-01-01

    In this paper we introduce IPMACC, a framework for translating OpenACC applications to CUDA or OpenCL. IPMACC is composed of set of translators translating OpenACC for C applications to CUDA or OpenCL. The framework uses the system compiler (e.g. nvcc) for generating final accelerator's binary. The framework can be used for extending the OpenACC API, executing OpenACC applications, or obtaining CUDA or OpenCL code which is equivalent to OpenACC code. We verify correctness of our framework und...

  18. Forks impacts and motivations in free and open source projects

    Directory of Open Access Journals (Sweden)

    R. Viseur

    2012-02-01

    Full Text Available Forking is a mechanism of splitting in a community and is typically found in the free and open source software field. As a failure of cooperation in a context of open innovation, forking is a practical and informative subject of study. In-depth researches concerning the fork phenomenon are uncommon. We therefore conducted a detailed study of 26 forks from popular free and open source projects. We created fact sheets, highlighting the impact and motivations to fork. We particularly point to the fact that the desire for greater technical differentiation and problems of project governance are major sources of conflict.

  19. A Survey of Open Source Tools for Business Intelligence

    DEFF Research Database (Denmark)

    Thomsen, Christian; Pedersen, Torben Bach

    2009-01-01

    The industrial use of open source Business Intelligence (BI) tools is becoming more common, but is still not as widespread as for other types of software. It is therefore of interest to explore which possibilities are available for open source BI and compare the tools. In this survey paper, we...... consider the capabilities of a number of open source tools for BI. In the paper, we consider a number of Extract-Transform-Load (ETL) tools, database management systems (DBMSs), On-Line Analytical Processing (OLAP) servers, and OLAP clients. We find that, unlike the situation a few years ago, there now...

  20. Open source R&D - an anomaly in innovation management?

    DEFF Research Database (Denmark)

    Ulhøi, John Parm

    2004-01-01

    This paper addresses innovations based on the principle of open source or non-proprietary knowledge. Viewed through the lens of private property theory, such agency appears to be a true anomaly. However, by a further turn of the theoretical kaleidoscope, we will show that there may be perfectly...... justifiable reasons for not regarding open source innovations as anomalies. The paper has identified three generic cases of open source innovation, which is an offspring of contemporary theory made possible by combining elements of the model of private agency with those of the model of collective agency...

  1. Epistemic Communities, Situated Learning and Open Source Software Development

    DEFF Research Database (Denmark)

    Edwards, Kasper

    2001-01-01

    This paper analyses open source software (OSS) development as an epistemic community where each individual project is perceived as a single epistemic community. OSS development is a learning process where the involved parties contribute to, and learn from the community. It is discovered that theory...... of epistemic communities does indeed contribute to the understanding of open source software development. But, the important learning process of open source software development is not readily explained. The paper then introduces situated learning and legitimate peripheral participation as theoretical...

  2. Open source R&D - an anomaly in innovation management?

    DEFF Research Database (Denmark)

    Ulhøi, John Parm

    2004-01-01

    This paper addresses innovations based on the principle of open source or non-proprietary knowledge. Viewed through the lens of private property theory, such agency appears to be a true anomaly. However, by a further turn of the theoretical kaleidoscope, we will show that there may be perfectly...... justifiable reasons for not regarding open source innovations as anomalies. The paper has identified three generic cases of open source innovation, which is an offspring of contemporary theory made possible by combining elements of the model of private agency with those of the model of collective agency...

  3. openBIS ELN-LIMS: an open-source database for academic laboratories

    OpenAIRE

    Barillari, Caterina; Ottoz, Diana S. M.; Fuentes-Serna, Juan Mariano; Ramakrishnan, Chandrasekhar; Rinn, Bernd; Rudolf, Fabian

    2015-01-01

    Summary: The open-source platform openBIS (open Biology Information System) offers an Electronic Laboratory Notebook and a Laboratory Information Management System (ELN-LIMS) solution suitable for the academic life science laboratories. openBIS ELN-LIMS allows researchers to efficiently document their work, to describe materials and methods and to collect raw and analyzed data. The system comes with a user-friendly web interface where data can be added, edited, browsed and searched. Availabil...

  4. Integrating Free and Open Source Solutions into Geospatial Science Education

    Directory of Open Access Journals (Sweden)

    Vaclav Petras

    2015-06-01

    Full Text Available While free and open source software becomes increasingly important in geospatial research and industry, open science perspectives are generally less reflected in universities’ educational programs. We present an example of how free and open source software can be incorporated into geospatial education to promote open and reproducible science. Since 2008 graduate students at North Carolina State University have the opportunity to take a course on geospatial modeling and analysis that is taught with both proprietary and free and open source software. In this course, students perform geospatial tasks simultaneously in the proprietary package ArcGIS and the free and open source package GRASS GIS. By ensuring that students learn to distinguish between geospatial concepts and software specifics, students become more flexible and stronger spatial thinkers when choosing solutions for their independent work in the future. We also discuss ways to continually update and improve our publicly available teaching materials for reuse by teachers, self-learners and other members of the GIS community. Only when free and open source software is fully integrated into geospatial education, we will be able to encourage a culture of openness and, thus, enable greater reproducibility in research and development applications.

  5. Standard Interfaces for Open Source Infrastructure as a Service Platforms

    Directory of Open Access Journals (Sweden)

    Andrei IONESCU

    2015-01-01

    Full Text Available To reduce vendor lock-in and fragmentation and to evolve into a transparent platform, IaaS platforms must adhere to open standards. All the major open source IaaS Platforms offer interfaces compatible with the de facto standards but mostly lacks support for the de jure, open efforts of standardization. Available implementations of open standards are not part of their main development efforts. More development resources as well as consolidation of open standards are needed to achieve increased portability and interoperability.

  6. OMPC: an open-source MATLAB®-to-Python compiler

    Directory of Open Access Journals (Sweden)

    Peter Jurica

    2009-02-01

    Full Text Available Free access to scientific information facilitates scientific progress. Open-access scientific journals are a first step in this direction; a further step is to make auxiliary and supplementary materials that accompany scientific publications, such as methodological procedures and data-analysis tools, open and accessible to the scientific community. To this purpose it is instrumental to establish a software base, which will grow toward a comprehensive free and open-source language of technical and scientific computing. Endeavors in this direction are met with an important obstacle. MATLAB®, the predominant computation tool in many fields of research, is a closed-source commercial product. To facilitate the transition to an open computation platform, we introduce an Open-source MATLAB®-to-Python Compiler (OMPC, a platform that uses syntax adaptation and emulation to allow transparent import of existing MATLAB® functions into Python programs. The imported MATLAB® modules run independent of MATLAB®, relying on Python's numerical and scientific libraries. Python offers a stable and mature open source platform that, in many respects, surpasses commonly used, expensive commercial closed source packages. The proposed software will therefore facilitate the transparent transition towards a free and general open-source lingua franca for scientific computation, while enabling access to the existing methods and algorithms of technical computing already available in MATLAB®. OMPC is available at http://ompc.juricap.com.

  7. OMPC: an Open-Source MATLAB-to-Python Compiler.

    Science.gov (United States)

    Jurica, Peter; van Leeuwen, Cees

    2009-01-01

    Free access to scientific information facilitates scientific progress. Open-access scientific journals are a first step in this direction; a further step is to make auxiliary and supplementary materials that accompany scientific publications, such as methodological procedures and data-analysis tools, open and accessible to the scientific community. To this purpose it is instrumental to establish a software base, which will grow toward a comprehensive free and open-source language of technical and scientific computing. Endeavors in this direction are met with an important obstacle. MATLAB((R)), the predominant computation tool in many fields of research, is a closed-source commercial product. To facilitate the transition to an open computation platform, we propose Open-source MATLAB((R))-to-Python Compiler (OMPC), a platform that uses syntax adaptation and emulation to allow transparent import of existing MATLAB((R)) functions into Python programs. The imported MATLAB((R)) modules will run independently of MATLAB((R)), relying on Python's numerical and scientific libraries. Python offers a stable and mature open source platform that, in many respects, surpasses commonly used, expensive commercial closed source packages. The proposed software will therefore facilitate the transparent transition towards a free and general open-source lingua franca for scientific computation, while enabling access to the existing methods and algorithms of technical computing already available in MATLAB((R)). OMPC is available at http://ompc.juricap.com.

  8. OMPC: an Open-Source MATLAB®-to-Python Compiler

    Science.gov (United States)

    Jurica, Peter; van Leeuwen, Cees

    2008-01-01

    Free access to scientific information facilitates scientific progress. Open-access scientific journals are a first step in this direction; a further step is to make auxiliary and supplementary materials that accompany scientific publications, such as methodological procedures and data-analysis tools, open and accessible to the scientific community. To this purpose it is instrumental to establish a software base, which will grow toward a comprehensive free and open-source language of technical and scientific computing. Endeavors in this direction are met with an important obstacle. MATLAB®, the predominant computation tool in many fields of research, is a closed-source commercial product. To facilitate the transition to an open computation platform, we propose Open-source MATLAB®-to-Python Compiler (OMPC), a platform that uses syntax adaptation and emulation to allow transparent import of existing MATLAB® functions into Python programs. The imported MATLAB® modules will run independently of MATLAB®, relying on Python's numerical and scientific libraries. Python offers a stable and mature open source platform that, in many respects, surpasses commonly used, expensive commercial closed source packages. The proposed software will therefore facilitate the transparent transition towards a free and general open-source lingua franca for scientific computation, while enabling access to the existing methods and algorithms of technical computing already available in MATLAB®. OMPC is available at http://ompc.juricap.com. PMID:19225577

  9. Towards the Adoption of Open Source and Open Access Electronic Health Record Systems

    Directory of Open Access Journals (Sweden)

    Ilias Maglogiannis

    2012-01-01

    Full Text Available As the Electronic Health Record (EHR systems constantly expand to support more clinical activities and their implementations in healthcare organizations become more widespread, several communities have been working intensively for several years to develop open access and open source EHR software, aiming at reducing the costs of EHR deployment and maintenance. In this paper, we describe and evaluate the most popular open source electronic medical records such as openEMR, openMRS and patientOS, providing their technical features and potentials. These systems are considered quite important due to their prevalence. The article presents the key features of each system and outlines the advantages and problems of Open Source Software (OSS Systems through a review of the literature, in order to demonstrate the possibility of their adoption in modern electronic healthcare systems. Also discussed are the future trends of OS EHRs in the context of the Personal Health Records and mobile computing paradigm.

  10. Open-source software gets boost at UN

    CERN Multimedia

    Schenker, J L

    2003-01-01

    "A months-long backroom battle led by Brazil, with support from India, South Africa and China, against the United States over open-source software took center stage Wednesday at the UN information summit meeting" (1 page)

  11. Implementing a real estate management system using open source ...

    African Journals Online (AJOL)

    Implementing a real estate management system using open source GIS software. ... already gets most of the information without having to leave home or work. ... to provide the background on which the parcels of land (plots) are displayed.

  12. Open source Modeling and optimization tools for Planning

    Energy Technology Data Exchange (ETDEWEB)

    Peles, S. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2017-02-10

    Open source modeling and optimization tools for planning The existing tools and software used for planning and analysis in California are either expensive, difficult to use, or not generally accessible to a large number of participants. These limitations restrict the availability of participants for larger scale energy and grid studies in the state. The proposed initiative would build upon federal and state investments in open source software, and create and improve open source tools for use in the state planning and analysis activities. Computational analysis and simulation frameworks in development at national labs and universities can be brought forward to complement existing tools. An open source platform would provide a path for novel techniques and strategies to be brought into the larger community and reviewed by a broad set of stakeholders.

  13. Open Source Radiation Hardened by Design Technology

    Science.gov (United States)

    Shuler, Robert

    2016-01-01

    The proposed technology allows use of the latest microcircuit technology with lowest power and fastest speed, with minimal delay and engineering costs, through new Radiation Hardened by Design (RHBD) techniques that do not require extensive process characterization, technique evaluation and re-design at each Moore's Law generation. The separation of critical node groups is explicitly parameterized so it can be increased as microcircuit technologies shrink. The technology will be open access to radiation tolerant circuit vendors. INNOVATION: This technology would enhance computation intensive applications such as autonomy, robotics, advanced sensor and tracking processes, as well as low power applications such as wireless sensor networks. OUTCOME / RESULTS: 1) Simulation analysis indicates feasibility. 2)Compact voting latch 65 nanometer test chip designed and submitted for fabrication -7/2016. INFUSION FOR SPACE / EARTH: This technology may be used in any digital integrated circuit in which a high level of resistance to Single Event Upsets is desired, and has the greatest benefit outside low earth orbit where cosmic rays are numerous.

  14. A FRAMEWORK FOR AN OPEN SOURCE GEOSPATIAL CERTIFICATION MODEL

    OpenAIRE

    Khan, T. U. R.; Davis, P.; Behr, F.-J.

    2016-01-01

    The geospatial industry is forecasted to have an enormous growth in the forthcoming years and an extended need for well-educated workforce. Hence ongoing education and training play an important role in the professional life. Parallel, in the geospatial and IT arena as well in the political discussion and legislation Open Source solutions, open data proliferation, and the use of open standards have an increasing significance. Based on the Memorandum of Understanding between International Cart...

  15. Modular Open-Source Software for Item Factor Analysis

    Science.gov (United States)

    Pritikin, Joshua N.; Hunter, Micheal D.; Boker, Steven M.

    2015-01-01

    This article introduces an item factor analysis (IFA) module for "OpenMx," a free, open-source, and modular statistical modeling package that runs within the R programming environment on GNU/Linux, Mac OS X, and Microsoft Windows. The IFA module offers a novel model specification language that is well suited to programmatic generation…

  16. Open Source Solutions for Libraries: ABCD vs Koha

    Science.gov (United States)

    Macan, Bojan; Fernandez, Gladys Vanesa; Stojanovski, Jadranka

    2013-01-01

    Purpose: The purpose of this study is to present an overview of the two open source (OS) integrated library systems (ILS)--Koha and ABCD (ISIS family), to compare their "next-generation library catalog" functionalities, and to give comparison of other important features available through ILS modules. Design/methodology/approach: Two open source…

  17. Modular Open-Source Software for Item Factor Analysis

    Science.gov (United States)

    Pritikin, Joshua N.; Hunter, Micheal D.; Boker, Steven M.

    2015-01-01

    This article introduces an item factor analysis (IFA) module for "OpenMx," a free, open-source, and modular statistical modeling package that runs within the R programming environment on GNU/Linux, Mac OS X, and Microsoft Windows. The IFA module offers a novel model specification language that is well suited to programmatic generation…

  18. A Survey Of Top 10 Open Source Learning Management Systems

    Directory of Open Access Journals (Sweden)

    Mohamed R. Elabnody

    2015-08-01

    Full Text Available Open Source LMSs are fully flexible and customizable so they can be designed in line with your schoolorganizations brand image. Open Source LMSs can also be converted to social learning platforms. You can create an online community through your LMS. This paper describes the most important features in learning management systems LMS that are critical to compare and contrast depend on your system requirements. Also represents a multiple LMS providers that are designed to use in university environment.

  19. Open-source 3D-printable optics equipment.

    Science.gov (United States)

    Zhang, Chenlong; Anzalone, Nicholas C; Faria, Rodrigo P; Pearce, Joshua M

    2013-01-01

    Just as the power of the open-source design paradigm has driven down the cost of software to the point that it is accessible to most people, the rise of open-source hardware is poised to drive down the cost of doing experimental science to expand access to everyone. To assist in this aim, this paper introduces a library of open-source 3-D-printable optics components. This library operates as a flexible, low-cost public-domain tool set for developing both research and teaching optics hardware. First, the use of parametric open-source designs using an open-source computer aided design package is described to customize the optics hardware for any application. Second, details are provided on the use of open-source 3-D printers (additive layer manufacturing) to fabricate the primary mechanical components, which are then combined to construct complex optics-related devices. Third, the use of the open-source electronics prototyping platform are illustrated as control for optical experimental apparatuses. This study demonstrates an open-source optical library, which significantly reduces the costs associated with much optical equipment, while also enabling relatively easily adapted customizable designs. The cost reductions in general are over 97%, with some components representing only 1% of the current commercial investment for optical products of similar function. The results of this study make its clear that this method of scientific hardware development enables a much broader audience to participate in optical experimentation both as research and teaching platforms than previous proprietary methods.

  20. Open-source 3D-printable optics equipment.

    Directory of Open Access Journals (Sweden)

    Chenlong Zhang

    Full Text Available Just as the power of the open-source design paradigm has driven down the cost of software to the point that it is accessible to most people, the rise of open-source hardware is poised to drive down the cost of doing experimental science to expand access to everyone. To assist in this aim, this paper introduces a library of open-source 3-D-printable optics components. This library operates as a flexible, low-cost public-domain tool set for developing both research and teaching optics hardware. First, the use of parametric open-source designs using an open-source computer aided design package is described to customize the optics hardware for any application. Second, details are provided on the use of open-source 3-D printers (additive layer manufacturing to fabricate the primary mechanical components, which are then combined to construct complex optics-related devices. Third, the use of the open-source electronics prototyping platform are illustrated as control for optical experimental apparatuses. This study demonstrates an open-source optical library, which significantly reduces the costs associated with much optical equipment, while also enabling relatively easily adapted customizable designs. The cost reductions in general are over 97%, with some components representing only 1% of the current commercial investment for optical products of similar function. The results of this study make its clear that this method of scientific hardware development enables a much broader audience to participate in optical experimentation both as research and teaching platforms than previous proprietary methods.

  1. Open source electronic health records and chronic disease management.

    Science.gov (United States)

    Goldwater, Jason C; Kwon, Nancy J; Nathanson, Ashley; Muckle, Alison E; Brown, Alexa; Cornejo, Kerri

    2014-02-01

    To study and report on the use of open source electronic health records (EHR) to assist with chronic care management within safety net medical settings, such as community health centers (CHC). The study was conducted by NORC at the University of Chicago from April to September 2010. The NORC team undertook a comprehensive environmental scan, including a literature review, a dozen key informant interviews using a semistructured protocol, and a series of site visits to CHC that currently use an open source EHR. Two of the sites chosen by NORC were actively using an open source EHR to assist in the redesign of their care delivery system to support more effective chronic disease management. This included incorporating the chronic care model into an CHC and using the EHR to help facilitate its elements, such as care teams for patients, in addition to maintaining health records on indigent populations, such as tuberculosis status on homeless patients. The ability to modify the open-source EHR to adapt to the CHC environment and leverage the ecosystem of providers and users to assist in this process provided significant advantages in chronic care management. Improvements in diabetes management, controlled hypertension and increases in tuberculosis vaccinations were assisted through the use of these open source systems. The flexibility and adaptability of open source EHR demonstrated its utility and viability in the provision of necessary and needed chronic disease care among populations served by CHC.

  2. Your Personal Analysis Toolkit - An Open Source Solution

    Science.gov (United States)

    Mitchell, T.

    2009-12-01

    Open source software is commonly known for its web browsers, word processors and programming languages. However, there is a vast array of open source software focused on geographic information management and geospatial application building in general. As geo-professionals, having easy access to tools for our jobs is crucial. Open source software provides the opportunity to add a tool to your tool belt and carry it with you for your entire career - with no license fees, a supportive community and the opportunity to test, adopt and upgrade at your own pace. OSGeo is a US registered non-profit representing more than a dozen mature geospatial data management applications and programming resources. Tools cover areas such as desktop GIS, web-based mapping frameworks, metadata cataloging, spatial database analysis, image processing and more. Learn about some of these tools as they apply to AGU members, as well as how you can join OSGeo and its members in getting the job done with powerful open source tools. If you haven't heard of OSSIM, MapServer, OpenLayers, PostGIS, GRASS GIS or the many other projects under our umbrella - then you need to hear this talk. Invest in yourself - use open source!

  3. The Imagery Exchange (TIE): Open Source Imagery Management System

    Science.gov (United States)

    Alarcon, C.; Huang, T.; Thompson, C. K.; Roberts, J. T.; Hall, J. R.; Cechini, M.; Schmaltz, J. E.; McGann, J. M.; Boller, R. A.; Murphy, K. J.; Bingham, A. W.

    2013-12-01

    The NASA's Global Imagery Browse Service (GIBS) is the Earth Observation System (EOS) imagery solution for delivering global, full-resolution satellite imagery in a highly responsive manner. GIBS consists of two major subsystems, OnEarth and The Imagery Exchange (TIE). TIE is the GIBS horizontally scaled imagery workflow manager component, an Open Archival Information System (OAIS) responsible for orchestrating the acquisition, preparation, generation, and archiving of imagery to be served by OnEarth. TIE is an extension of the Data Management and Archive System (DMAS), a high performance data management system developed at the Jet Propulsion Laboratory by leveraging open source tools and frameworks, which includes Groovy/Grails, Restlet, Apache ZooKeeper, Apache Solr, and other open source solutions. This presentation focuses on the application of Open Source technologies in developing a horizontally scaled data system like DMAS and TIE. As part of our commitment in contributing back to the open source community, TIE is in the process of being open sourced. This presentation will also cover our current effort in getting TIE in to the hands of the community from which we benefited from.

  4. Industrial open source solutions for product life cycle management

    Directory of Open Access Journals (Sweden)

    Jaime Campos

    2014-12-01

    Full Text Available The authors go through the open source for product life cycle management (PLM and the efforts done from communities such as the open source initiative. The characteristics of the open source solutions are highlighted as well. Next, the authors go through the requirements for PLM. This is an area where more attention has been given as the manufacturers are competing with the quality and life cycle costs of their products. Especially, the need of companies to try to get a strong position in providing services for their products and thus to make themselves less vulnerable to changes in the market has led to high interest in product life cycle simulation. The potential of applying semantic data management to solve these problems discussed in the light of recent developments. In addition, a basic roadmap is presented as to how the above-described problems could be tackled with open software solutions.

  5. Willingness to Cooperate Within the Open Source Software Domain

    NARCIS (Netherlands)

    Ravesteijn, J.P.P.; Silvius, A.J.G.

    2008-01-01

    Open Source Software (OSS) is an increasingly hot topic in the business domain. One of the key benefits mentioned is the unlimited access to the source code, which enables large communities to continuously improve a software application and prevents vendor lock-in. How attractive these benefits may

  6. A FRAMEWORK FOR AN OPEN SOURCE GEOSPATIAL CERTIFICATION MODEL

    Directory of Open Access Journals (Sweden)

    T. U. R. Khan

    2016-06-01

    Full Text Available The geospatial industry is forecasted to have an enormous growth in the forthcoming years and an extended need for well-educated workforce. Hence ongoing education and training play an important role in the professional life. Parallel, in the geospatial and IT arena as well in the political discussion and legislation Open Source solutions, open data proliferation, and the use of open standards have an increasing significance. Based on the Memorandum of Understanding between International Cartographic Association, OSGeo Foundation, and ISPRS this development led to the implementation of the ICA-OSGeo-Lab imitative with its mission “Making geospatial education and opportunities accessible to all”. Discussions in this initiative and the growth and maturity of geospatial Open Source software initiated the idea to develop a framework for a worldwide applicable Open Source certification approach. Generic and geospatial certification approaches are already offered by numerous organisations, i.e., GIS Certification Institute, GeoAcademy, ASPRS, and software vendors, i. e., Esri, Oracle, and RedHat. They focus different fields of expertise and have different levels and ways of examination which are offered for a wide range of fees. The development of the certification framework presented here is based on the analysis of diverse bodies of knowledge concepts, i.e., NCGIA Core Curriculum, URISA Body Of Knowledge, USGIF Essential Body Of Knowledge, the “Geographic Information: Need to Know", currently under development, and the Geospatial Technology Competency Model (GTCM. The latter provides a US American oriented list of the knowledge, skills, and abilities required of workers in the geospatial technology industry and influenced essentially the framework of certification. In addition to the theoretical analysis of existing resources the geospatial community was integrated twofold. An online survey about the relevance of Open Source was performed and

  7. a Framework for AN Open Source Geospatial Certification Model

    Science.gov (United States)

    Khan, T. U. R.; Davis, P.; Behr, F.-J.

    2016-06-01

    The geospatial industry is forecasted to have an enormous growth in the forthcoming years and an extended need for well-educated workforce. Hence ongoing education and training play an important role in the professional life. Parallel, in the geospatial and IT arena as well in the political discussion and legislation Open Source solutions, open data proliferation, and the use of open standards have an increasing significance. Based on the Memorandum of Understanding between International Cartographic Association, OSGeo Foundation, and ISPRS this development led to the implementation of the ICA-OSGeo-Lab imitative with its mission "Making geospatial education and opportunities accessible to all". Discussions in this initiative and the growth and maturity of geospatial Open Source software initiated the idea to develop a framework for a worldwide applicable Open Source certification approach. Generic and geospatial certification approaches are already offered by numerous organisations, i.e., GIS Certification Institute, GeoAcademy, ASPRS, and software vendors, i. e., Esri, Oracle, and RedHat. They focus different fields of expertise and have different levels and ways of examination which are offered for a wide range of fees. The development of the certification framework presented here is based on the analysis of diverse bodies of knowledge concepts, i.e., NCGIA Core Curriculum, URISA Body Of Knowledge, USGIF Essential Body Of Knowledge, the "Geographic Information: Need to Know", currently under development, and the Geospatial Technology Competency Model (GTCM). The latter provides a US American oriented list of the knowledge, skills, and abilities required of workers in the geospatial technology industry and influenced essentially the framework of certification. In addition to the theoretical analysis of existing resources the geospatial community was integrated twofold. An online survey about the relevance of Open Source was performed and evaluated with 105

  8. Treatment of pectus excavatum recurring after open surgery using Nuss procedure: A case report

    Directory of Open Access Journals (Sweden)

    Yucel Akkas

    2016-12-01

    Full Text Available We would like to report a 14-year-old male patient with pectus excavatum that recurred 10 years later after Ravitch surgery who was successfully operated using Nuss procedure. The patient underwent pectus excavatum surgery using Nuss procedure. The patient was discharged from the hospital at post-operative 5.day. The bar is planned to be removed in post-operative 3.year. In conclusion, surgery of pectus excavatum that recurred after open surgery is risky. Nuss procedure, which is a minimally-invasive technique, is a safe procedure that can be successfully applied in recurring cases due to short time of surgery and minimal blood loss.

  9. Role of preoperative sonography in predicting conversion from laparoscopic cholecystectomy to open surgery

    Energy Technology Data Exchange (ETDEWEB)

    Tosun, Alptekin, E-mail: tosun_alptekin@yahoo.com [Giresun University Hospital, Department of Radiology (Turkey); Hancerliogullari, Kadir Oymen [Giresun University Hospital, Department of Pediatric Surgery (Turkey); Serifoglu, Ismail [Bulent Ecevit University Hospital, Department of Radiology (Turkey); Capan, Yavuz [Gaziantep Primer Hospital, Department of Surgery (Turkey); Ozkaya, Enis [Dr. Sami Ulus Maternity and Children' s Health Training and Research Hospital, Department of Obstetrics and Gynecology (Turkey)

    2015-03-15

    Highlights: •The purpose of this study was to establish a radiologic view on prediction of conversion from laparoscopic cholecystectomy to open surgery. The study may be a guide for the surgeon to prefer laparoscopic or open surgery. -- Abstract: Background: Laparoscopic cholecystectomy is the first step treatment in cholelithiasis. The purpose of this study was to establish a radiologic view on prediction of conversion from laparoscopic cholecystectomy to open surgery. Methods: This study included 176 patients who had undergone laparoscopic cholecystectomy. Preoperative ultrasonographic findings were assessed and we gave points to each finding according to results from correlation analysis. After the scoring we investigated the relationship between ultrasonographic findings and conversion from laparoscopic cholecystectomy to open surgery. Results: Scoring significantly predicted failure in laparoscopic approach (AUC = 0.758, P = 0.003,). Optimal cut off score was found to be 1.95 with 67% sensitivity and 78% specificity. Score > 1.95 was a risk factor for failure in laparoscopic approach [odds ratio = 7.1(95% CI,2-24.9, P = 0.002)]. There were 8 subjects out of 36(22%) with high score underwent open surgery while 4 out of 128 (3%) subjects with low score needed open surgery (p = 0.002). Negative predictive value of 128/132 = 97%. Mean score of whole study population was 1.28 (range 0–8.8) and mean score of subjects underwent open surgery was 3.6 while it was 1.1 in successful laparoscopic approach group (p < 0.001). Mean Age and BMI were similar between groups (p > 0.05). Sex of subjects did not affect the success of surgery (p > 0.05). Conclusion: The contribution of preoperative ultrasonography is emphasized in many studies. Our study suggests quantitative results on conversion from laparoscopic cholecystectomy to open surgery. We believe that radiologists have to indicate the risk of conversion in their ultrasonography reports.

  10. Does Prior Laparoscopic and Open Surgery Experience Have Any Impact on Learning Curve in Transition to Robotic Surgery?

    Directory of Open Access Journals (Sweden)

    Cüneyt Adayener

    2016-12-01

    Full Text Available It has been 15 years since the Food And Drug Administration approved the Da Vinci® robotic surgery system. Robotic applications are being used extensively in urology, particularly in radical prostatectomy. Like all high-tech products, this system also has a high cost and a steep learning curve, therefore, preventing it from becoming widespread. There are various studies on the effect of open surgery or laparoscopy experience on the learning curve of robotic surgery. Analyzing these interactions well will provide valuable information on making the training period of robotic system more efficient.

  11. An Organizational Perspective on Free and Open Source Software Development

    DEFF Research Database (Denmark)

    Vujovic, Sladjana; Ulhøi, John Parm

    2006-01-01

    The traditional model of innovation, the restricted/close source (R/CS) model, is based on proprietary knowledge and private model of production. A fundamental different one, the open source model is based on non-proprietary knowledge and non-economic motives. Moreover, between the two......, there are various combinations or hybrids, in the following referred to as free/open source-based (F/OS-based) agency. In the discussions, practical examples from software production are included. In conclusion, the paper identifies avenues for future research as well as important managerial and policy implications....

  12. Open source identity management patterns and practices using OpenAM 10.x

    CERN Document Server

    Kenning, Waylon

    2013-01-01

    This is a Packt Mini in a tutorial format that provides multiple examples on Identity Management using OpenAM 10.x.Open Source Identity Management Patterns and Practices Using OpenAM 10.x is great for developers and architects who are new to Identity Management, and who want a brief overview of what's possible and how to quickly implement a prototype. It's assumed that you've had experience with web applications and some knowledge of Apache and Tomcat.

  13. A Framework for the Systematic Collection of Open Source Intelligence

    Energy Technology Data Exchange (ETDEWEB)

    Pouchard, Line Catherine [ORNL; Trien, Joseph P [ORNL; Dobson, Jonathan D [ORNL

    2009-01-01

    Following legislative directions, the Intelligence Community has been mandated to make greater use of Open Source Intelligence (OSINT). Efforts are underway to increase the use of OSINT but there are many obstacles. One of these obstacles is the lack of tools helping to manage the volume of available data and ascertain its credibility. We propose a unique system for selecting, collecting and storing Open Source data from the Web and the Open Source Center. Some data management tasks are automated, document source is retained, and metadata containing geographical coordinates are added to the documents. Analysts are thus empowered to search, view, store, and analyze Web data within a single tool. We present ORCAT I and ORCAT II, two implementations of the system.

  14. OpenBEM - An open source Boundary Element Method software in Acoustics

    DEFF Research Database (Denmark)

    Cutanda Henriquez, Vicente; Juhl, Peter Møller

    2010-01-01

    OpenBEM is a collection of open source programs for solving the Helmholtz Equation using the Boundary Element Method. The collection is written in Matlab by the authors and contains codes for dealing with exterior and interior problems in two or three dimensions as well as implementation of axi...

  15. Secrecy versus openness: Internet security and the limits of open source and peer production

    NARCIS (Netherlands)

    Schmidt, A.

    2014-01-01

    Open source and peer production have been praised as organisational models that could change the world for the better. It is commonly asserted that almost any societal activity could benefit from distributed, bottom-up collaboration — by making societal interaction more open, more social, and more d

  16. The role of primary plastic surgery in the management of open fractures.

    Science.gov (United States)

    Court-Brown, Charles M; Honeyman, Calum S; Clement, Nick D; Hamilton, Stuart A; McQueen, Margaret M

    2015-12-01

    A study was undertaken to determine the requirement for primary plastic surgery in the treatment of open fractures. We reviewed 3297 consecutive open fractures in a 22-year period in a defined population. Analysis showed that 12.6% of patients required primary plastic surgery with 5.6% being treated with split skin grafting and 7.2% with a flap. Only 3.5% of open upper limb fractures required primary plastic surgery compared to 27.9% of open lower limb fractures. The fractures that required most primary plastic surgery were those of the femoral diaphysis and all fractures between the proximal tibia and the midfoot. The incidence of open fractures that require primary plastic surgery was 28/10(6)/year. The incidence in open upper and lower limb fractures was 5.3/10(6)/year and 22.7/10(6)/year respectively. Using these figures it is possible to estimate the numbers of open fractures that will require primary plastic surgery each year in the United Kingdom.

  17. Expression of adhesion and activation molecules on lymphocytes during open-heart surgery with cardiopulmonary bypass

    DEFF Research Database (Denmark)

    Toft, P; Tønnesen, Else Kirstine; Zülow, I

    1997-01-01

    Open-heart surgery with cardiopulmonary bypass (CPB) and abdominal surgery are associated with lymphocytopenia. We measured a panel of adhesion and activation molecules on lymphocytes to clarify possible association of CPB with increased expression of these molecules. Eight patients undergoing open......-heart surgery and eight with abdominal surgery were studied. The adhesion molecules CD11a/CD18 (LFA-1_, CD11c/CD18 and CD44 and the activation molecules CD25, CD69, CD71 and MHCII were measured, using monoclonal antibodies and flow cytometry. Lymphocytopenia was observed during CPB and for some hours after both...... open-heart and abdominal surgery. The proportion of CD11a/CD18-positive lymphocytes rose from 67.6 +/- 8% to 86.4 +/- 3% after aortic declamping (p

  18. Open-heart Surgery Complications Following Programmed Education and Nurses' Clinical Competence

    Directory of Open Access Journals (Sweden)

    Mahnaz Rakhshan

    2017-01-01

    Full Text Available Heart surgery can lead to certain complications that, if not diagnosed and treated on time, can be fatal. In view of the fact that nurses' clinical competence affects the quality of clinical judgment, the present study aimed to explore the effect of programmed education and nurses' clinical competence on complications following open-heart surgeries. The results of the present study showed that a closer attention to regular and programmed education and informing of open-heart surgery patients, especially before surgery and at the time of discharge, along with the clinical competence of nurses in ICUs, can reduce the incidence of post-surgery complications. Since the nurses' clinical competence greatly affects their clinical judgments and quality of care, paying greater attention to the nurses' education through systematic programs and increasing the clinical competence can lead to fewer post-heart-surgery complications; this, in turn, reduces the length of stay and the ensuing costs.

  19. Open source drug discovery in practice: a case study.

    Directory of Open Access Journals (Sweden)

    Christine Årdal

    Full Text Available BACKGROUND: Open source drug discovery offers potential for developing new and inexpensive drugs to combat diseases that disproportionally affect the poor. The concept borrows two principle aspects from open source computing (i.e., collaboration and open access and applies them to pharmaceutical innovation. By opening a project to external contributors, its research capacity may increase significantly. To date there are only a handful of open source R&D projects focusing on neglected diseases. We wanted to learn from these first movers, their successes and failures, in order to generate a better understanding of how a much-discussed theoretical concept works in practice and may be implemented. METHODOLOGY/PRINCIPAL FINDINGS: A descriptive case study was performed, evaluating two specific R&D projects focused on neglected diseases. CSIR Team India Consortium's Open Source Drug Discovery project (CSIR OSDD and The Synaptic Leap's Schistosomiasis project (TSLS. Data were gathered from four sources: interviews of participating members (n = 14, a survey of potential members (n = 61, an analysis of the websites and a literature review. Both cases have made significant achievements; however, they have done so in very different ways. CSIR OSDD encourages international collaboration, but its process facilitates contributions from mostly Indian researchers and students. Its processes are formal with each task being reviewed by a mentor (almost always offline before a result is made public. TSLS, on the other hand, has attracted contributors internationally, albeit significantly fewer than CSIR OSDD. Both have obtained funding used to pay for access to facilities, physical resources and, at times, labor costs. TSLS releases its results into the public domain, whereas CSIR OSDD asserts ownership over its results. CONCLUSIONS/SIGNIFICANCE: Technically TSLS is an open source project, whereas CSIR OSDD is a crowdsourced project. However, both have enabled high

  20. Open source drug discovery in practice: a case study.

    Science.gov (United States)

    Årdal, Christine; Røttingen, John-Arne

    2012-01-01

    Open source drug discovery offers potential for developing new and inexpensive drugs to combat diseases that disproportionally affect the poor. The concept borrows two principle aspects from open source computing (i.e., collaboration and open access) and applies them to pharmaceutical innovation. By opening a project to external contributors, its research capacity may increase significantly. To date there are only a handful of open source R&D projects focusing on neglected diseases. We wanted to learn from these first movers, their successes and failures, in order to generate a better understanding of how a much-discussed theoretical concept works in practice and may be implemented. A descriptive case study was performed, evaluating two specific R&D projects focused on neglected diseases. CSIR Team India Consortium's Open Source Drug Discovery project (CSIR OSDD) and The Synaptic Leap's Schistosomiasis project (TSLS). Data were gathered from four sources: interviews of participating members (n = 14), a survey of potential members (n = 61), an analysis of the websites and a literature review. Both cases have made significant achievements; however, they have done so in very different ways. CSIR OSDD encourages international collaboration, but its process facilitates contributions from mostly Indian researchers and students. Its processes are formal with each task being reviewed by a mentor (almost always offline) before a result is made public. TSLS, on the other hand, has attracted contributors internationally, albeit significantly fewer than CSIR OSDD. Both have obtained funding used to pay for access to facilities, physical resources and, at times, labor costs. TSLS releases its results into the public domain, whereas CSIR OSDD asserts ownership over its results. Technically TSLS is an open source project, whereas CSIR OSDD is a crowdsourced project. However, both have enabled high quality research at low cost. The critical success factors appear to be clearly

  1. A common-source outbreak of Staphylococcus epidermidis infections among patients undergoing cardiac surgery.

    Science.gov (United States)

    Boyce, J M; Potter-Bynoe, G; Opal, S M; Dziobek, L; Medeiros, A A

    1990-03-01

    A single strain of Staphylococcus epidermidis caused an outbreak of postoperative wound infections and endocarditis during a 6-month period. Infections caused by the epidemic strain developed more frequently in valve surgery patients than in those undergoing coronary artery bypass graft surgery (P = .03) and occurred only in patients operated on by surgeon A. None of 17 members of the cardiac surgery team carried the epidemic strain in their anterior nares, axillae, or inguinal folds. Hand cultures were performed on 8 surgical personnel, and only surgeon A carried the epidemic strain on his hands. Isolates from cardiac surgery patients, bypass pump blood cultures, and the hands of the implicated surgeon all had identical antimicrobial susceptibility patterns, plasmid profiles, and EcoRI restriction endonuclease digest patterns. In the 24 months after control measures were implemented, no infections caused by the epidemic strain occurred among open heart surgery patients. The findings suggest that the common-source outbreak of infections among cardiac surgery patients was due to carriage of a strain S. epidermidis on the hands of a cardiac surgeon.

  2. An International Look at Women in Open Source

    Directory of Open Access Journals (Sweden)

    Cathy Malmrose

    2009-05-01

    Full Text Available When attending conferences, working with various open source teams, and generally interacting with people in the open source world, we see women as a small representative minority. The disparity leaves us wondering: "How to activate the other 50% of the population?". The question, "How do we include more women?" has been asked many times and answered in many ways. Cathy Malmrose, CEO of ZaReason, a Linux hardware company, stated, "possibly the most immediately effective solution is to showcase women internationally and their contributions. By simply talking about what women are doing all over the world, it creates an atmosphere of acceptance, encouraging more women to try contributing, no matter where they are located or what their situation is. Our goal is to normalize the experience of having women on open source projects". This issue of OSBR is a powerful effort to do just that. This article provides a glance at women in open source internationally. It is by no means comprehensive and is based solely on a random sampling of women who are currently contributing. The goal of this article is to give you a sense of the breadth and depth of women contributing to open source.

  3. Comparison of open-source linear programming solvers.

    Energy Technology Data Exchange (ETDEWEB)

    Gearhart, Jared Lee; Adair, Kristin Lynn; Durfee, Justin David.; Jones, Katherine A.; Martin, Nathaniel; Detry, Richard Joseph

    2013-10-01

    When developing linear programming models, issues such as budget limitations, customer requirements, or licensing may preclude the use of commercial linear programming solvers. In such cases, one option is to use an open-source linear programming solver. A survey of linear programming tools was conducted to identify potential open-source solvers. From this survey, four open-source solvers were tested using a collection of linear programming test problems and the results were compared to IBM ILOG CPLEX Optimizer (CPLEX) [1], an industry standard. The solvers considered were: COIN-OR Linear Programming (CLP) [2], [3], GNU Linear Programming Kit (GLPK) [4], lp_solve [5] and Modular In-core Nonlinear Optimization System (MINOS) [6]. As no open-source solver outperforms CPLEX, this study demonstrates the power of commercial linear programming software. CLP was found to be the top performing open-source solver considered in terms of capability and speed. GLPK also performed well but cannot match the speed of CLP or CPLEX. lp_solve and MINOS were considerably slower and encountered issues when solving several test problems.

  4. A randomized trial of laparoscopic versus open surgery for rectal cancer

    DEFF Research Database (Denmark)

    Bonjer, H Jaap; Deijen, Charlotte L; Abis, Gabor A;

    2015-01-01

    (locoregional recurrence) and survival after laparoscopic and open resection of rectal cancer. METHODS: In this international trial conducted in 30 hospitals, we randomly assigned patients with a solitary adenocarcinoma of the rectum within 15 cm of the anal verge, not invading adjacent tissues, and without...... of locoregional recurrence and disease-free and overall survival similar to those for open surgery. (Funded by Ethicon Endo-Surgery Europe and others; COLOR II ClinicalTrials.gov number, NCT00297791.)....

  5. Ten-year outcomes of a randomised trial of laparoscopic versus open surgery for colon cancer

    NARCIS (Netherlands)

    Deijen, C.L. (Charlotte L.); Vasmel, J.E. (Jeanine E.); E.S.M. De Lange-De Klerk (E. S M); M.A. Cuesta (Miguel); P-P. Coene (Peter Paul); J.F. Lange (Johan); W.J.H.J. Meijerink (Jeroen); J.J. Jakimowicz; J. Jeekel (Hans); Kazemier, G. (Geert); Janssen, I.M.C. (Ignace M. C.); L. Påhlman (Lars); E. Haglind (Eva); H.J. Bonjer (H. Jaap); Hellberg, R.; Haglind, E.; Kurlberg, G.; P.G. Lindgren (P.); B. Lindholm (Bengt); L. Påhlman (Lars); C. Dahlberg (Caroline); M.S. Raab; B. Anderberg (Bo); Ewerth, S.; M. Janson (Martin); J.E. Åkerlund (J.); K. Smedh (K.); A. Montgomery; S. Skullman (Stefan); P.O. Nyström; A. Kald (A.); A. Wänström (A.); J. Dalén (Johan); I. Svedberg (I.); G. Edlund (G.); U. Kressner (U.); K. Öberg (Kjell); O. Lundberg (O.); G.E. Lindmark (G.); T. Heikkinen (T.); M. Morino (Mario); G. Giraudo (G.); Lacy, A.M.; S. Delgado (Salvadora); Macarulla Sanz, E.; Díez, J.M. (J. Medina); O. Schwandner (O.); T.H. Schiedeck (T.); Shekarriz, H.; Bloechle, C.; I. Baca (I.); Weiss, O.; S. Msika (Simon); G. Desvignes (G.); K.L. Campbell (K.); A. Cuschieri (A.); H.J. Bonjer (Jaap); W.R. Schouten (Ruud); G. Kazemier (Geert); J.F. Lange (Johan); E. van der Harst (Erwin); Coene, P.P.L.O.; P.W. Plaisier; M.J.O.E. Bertleff (Marietta); Cuesta, M.A.; W. van der Broek (W.); Meijerink, W.J.H.J.; J.J. Jakimowicz; G.A.P. Nieuwenhuijzen (Gerard); J.K. Maring (John); Kivit, J.; I.M.C. Janssen (Ignace); E.J. Spillenaar Bilgen (Ernst Jan); F.J. Berends (Frits)

    2016-01-01

    textabstractBackground: Laparoscopic surgery for colon cancer is associated with improved recovery and similar cancer outcomes at 3 and 5 years in comparison with open surgery. However, long-term survival rates have rarely been reported. Here, we present survival and recurrence rates of the Dutch pa

  6. [Comparison of open versus laparoscopic surgeries for adrenal tumor: a meta-analysis].

    Science.gov (United States)

    Lin, Mao-Hu; Zhu, Xiao-Ying; Miao, Rui; He, Lei; Jia, Ning

    2016-11-20

    To systematically review the effectiveness and safety of open and laparoscopic surgeries for treatment of adrenal tumors. The online databases including CNKI, PUBMED, SinoMed, EBSCO, Springerlink, WanFang Data, and VIP were searched for clinical trials published from 1999 to 2016. A meta-analysis was performed using RevMan 5.2 software. A total of 2340 patients in 25 trials were included. The results of meta-analysis showed that laparoscopic surgery was better than open surgery in terms of intestinal function recovery time (OR=-0.96, 95%CI [-1.22, -0.70] P<0.000 01), hospitalization time (OR=-3.48, 95%CI [-4.13, -2.78], P<0.000 01), complications (OR=0.22, 95%CI [0.14, 0.35], P<0.0001), and volume of blood loss (OR=-104.77, 95%CI [-138.95, -70.60], P<0.000 01). There was no significant difference in the surgery cost between open and laparoscopic surgeries. Laparoscopic surgery is superior to open surgery for treatment of adrenal tumors for shorter intestinal function recovery time, surgery duration, and hospitalization time and less complications and blood loss.

  7. Ten-year outcomes of a randomised trial of laparoscopic versus open surgery for colon cancer

    NARCIS (Netherlands)

    Deijen, C.L. (Charlotte L.); Vasmel, J.E. (Jeanine E.); E.S.M. De Lange-De Klerk (E. S M); M.A. Cuesta (Miguel); P-P. Coene (Peter Paul); J.F. Lange (Johan); W.J.H.J. Meijerink (Jeroen); J.J. Jakimowicz; J. Jeekel (Hans); Kazemier, G. (Geert); Janssen, I.M.C. (Ignace M. C.); L. Påhlman (Lars); E. Haglind (Eva); H.J. Bonjer (H. Jaap)

    2016-01-01

    markdownabstractBackground: Laparoscopic surgery for colon cancer is associated with improved recovery and similar cancer outcomes at 3 and 5 years in comparison with open surgery. However, long-term survival rates have rarely been reported. Here, we present survival and recurrence rates of the

  8. Ten-year outcomes of a randomised trial of laparoscopic versus open surgery for colon cancer

    NARCIS (Netherlands)

    Deijen, C.L.; Vasmel, J.E.; Lange-de Klerk, E.S. de; Cuesta, M.A.; Coene, P.L.O.; Lange, J.F.; Meijerink, W.J.H.J.; Jakimowicz, J.J.; Jeekel, J.; Kazemier, G.; Pahlman, L.; Haglind, E.; Bonjer, H.J.

    2017-01-01

    BACKGROUND: Laparoscopic surgery for colon cancer is associated with improved recovery and similar cancer outcomes at 3 and 5 years in comparison with open surgery. However, long-term survival rates have rarely been reported. Here, we present survival and recurrence rates of the Dutch patients

  9. Dilemmas within Commercial Involvement in Open Source Software

    DEFF Research Database (Denmark)

    Ciesielska, Malgorzata; Westenholz, Ann

    2016-01-01

    Purpose – The purpose of this paper is to contribute to the literature about the commercial involvement in open source software, levels of this involvement and consequences of attempting to mix various logics of action. Design/methodology/approach – This paper uses the case study approach based...... on mixed methods: literature reviews and news searches, electronic surveys, qualitative interviews and observations. It combines discussions from several research projects as well as previous publications to present the scope of commercial choices within open source software and their consequences....... Findings – The findings show that higher levels of involvement in open source software communities poses important questions about the balance between economic, technological, and social logics as well as the benefits of being autonomous, having access to collaborative networks and minimizing risks related...

  10. Open Source AV solution supporting In Situ Simulation

    DEFF Research Database (Denmark)

    Krogh, Kristian; Pociunas, Gintas; Dahl, Mads Ronald

    the software to meet our expectations for a portable AV system for VAD. The system would make use of “off the shelf” hardware components which are widely available and easily replaced or expanded. The developed AV software and coding is contracted to be available as Copyleft Open Source to ensure low cost...... a stable AV software that has be developed and implemented for an in situ simulation initiative. This version (1.3) is the first on released as Open Source (Copyleft) software (see QR tag). We have found that it is possible to deliver multi-camera video assisted debriefing in a mobile, in situ simulation...... environment using an AV system constructed from “off the shelf” components and Open Source software....

  11. Open Source Web Based Geospatial Processing with OMAR

    Directory of Open Access Journals (Sweden)

    Mark Lucas

    2009-01-01

    Full Text Available The availability of geospatial data sets is exploding. New satellites, aerial platforms, video feeds, global positioning system tagged digital photos, and traditional GIS information are dramatically increasing across the globe. These raw materials need to be dynamically processed, combined and correlated to generate value added information products to answer a wide range of questions. This article provides an overview of OMAR web based geospatial processing. OMAR is part of the Open Source Software Image Map project under the Open Source Geospatial Foundation. The primary contributors of OSSIM make their livings by providing professional services to US Government agencies and programs. OMAR provides one example that open source software solutions are increasingly being deployed in US government agencies. We will also summarize the capabilities of OMAR and its plans for near term development.

  12. Bioclipse: an open source workbench for chemo- and bioinformatics

    Directory of Open Access Journals (Sweden)

    Wagener Johannes

    2007-02-01

    Full Text Available Abstract Background There is a need for software applications that provide users with a complete and extensible toolkit for chemo- and bioinformatics accessible from a single workbench. Commercial packages are expensive and closed source, hence they do not allow end users to modify algorithms and add custom functionality. Existing open source projects are more focused on providing a framework for integrating existing, separately installed bioinformatics packages, rather than providing user-friendly interfaces. No open source chemoinformatics workbench has previously been published, and no sucessful attempts have been made to integrate chemo- and bioinformatics into a single framework. Results Bioclipse is an advanced workbench for resources in chemo- and bioinformatics, such as molecules, proteins, sequences, spectra, and scripts. It provides 2D-editing, 3D-visualization, file format conversion, calculation of chemical properties, and much more; all fully integrated into a user-friendly desktop application. Editing supports standard functions such as cut and paste, drag and drop, and undo/redo. Bioclipse is written in Java and based on the Eclipse Rich Client Platform with a state-of-the-art plugin architecture. This gives Bioclipse an advantage over other systems as it can easily be extended with functionality in any desired direction. Conclusion Bioclipse is a powerful workbench for bio- and chemoinformatics as well as an advanced integration platform. The rich functionality, intuitive user interface, and powerful plugin architecture make Bioclipse the most advanced and user-friendly open source workbench for chemo- and bioinformatics. Bioclipse is released under Eclipse Public License (EPL, an open source license which sets no constraints on external plugin licensing; it is totally open for both open source plugins as well as commercial ones. Bioclipse is freely available at http://www.bioclipse.net.

  13. Bioclipse: an open source workbench for chemo- and bioinformatics

    Science.gov (United States)

    Spjuth, Ola; Helmus, Tobias; Willighagen, Egon L; Kuhn, Stefan; Eklund, Martin; Wagener, Johannes; Murray-Rust, Peter; Steinbeck, Christoph; Wikberg, Jarl ES

    2007-01-01

    Background There is a need for software applications that provide users with a complete and extensible toolkit for chemo- and bioinformatics accessible from a single workbench. Commercial packages are expensive and closed source, hence they do not allow end users to modify algorithms and add custom functionality. Existing open source projects are more focused on providing a framework for integrating existing, separately installed bioinformatics packages, rather than providing user-friendly interfaces. No open source chemoinformatics workbench has previously been published, and no sucessful attempts have been made to integrate chemo- and bioinformatics into a single framework. Results Bioclipse is an advanced workbench for resources in chemo- and bioinformatics, such as molecules, proteins, sequences, spectra, and scripts. It provides 2D-editing, 3D-visualization, file format conversion, calculation of chemical properties, and much more; all fully integrated into a user-friendly desktop application. Editing supports standard functions such as cut and paste, drag and drop, and undo/redo. Bioclipse is written in Java and based on the Eclipse Rich Client Platform with a state-of-the-art plugin architecture. This gives Bioclipse an advantage over other systems as it can easily be extended with functionality in any desired direction. Conclusion Bioclipse is a powerful workbench for bio- and chemoinformatics as well as an advanced integration platform. The rich functionality, intuitive user interface, and powerful plugin architecture make Bioclipse the most advanced and user-friendly open source workbench for chemo- and bioinformatics. Bioclipse is released under Eclipse Public License (EPL), an open source license which sets no constraints on external plugin licensing; it is totally open for both open source plugins as well as commercial ones. Bioclipse is freely available at . PMID:17316423

  14. Laparoscopic versus open surgery for adnexal tumor in pregnant women

    Directory of Open Access Journals (Sweden)

    Yu-Jin Koo

    2013-05-01

    Conclusion: Adnexal surgery during pregnancy could be performed in safety for both mother and fetus. The laparoscopic approach particularly offered more benefit than laparotomy in terms of surgical outcome and was shown to be as safe as laparotomy regarding obstetric complications such as miscarriage and preterm labor.

  15. Open Source Next Generation Visualization Software for Interplanetary Missions

    Science.gov (United States)

    Trimble, Jay; Rinker, George

    2016-01-01

    Mission control is evolving quickly, driven by the requirements of new missions, and enabled by modern computing capabilities. Distributed operations, access to data anywhere, data visualization for spacecraft analysis that spans multiple data sources, flexible reconfiguration to support multiple missions, and operator use cases, are driving the need for new capabilities. NASA's Advanced Multi-Mission Operations System (AMMOS), Ames Research Center (ARC) and the Jet Propulsion Laboratory (JPL) are collaborating to build a new generation of mission operations software for visualization, to enable mission control anywhere, on the desktop, tablet and phone. The software is built on an open source platform that is open for contributions (http://nasa.github.io/openmct).

  16. Open Source Development of Tangible Products - from a business perspective

    DEFF Research Database (Denmark)

    Fjeldsted, Asta S.; Adalsteinsdottir, Gudrun; Howard, Thomas J.

    This article’s objective is to set up some foundational theory and practices for Open Source Development (OSD) of tangible products, a novel and emerging approach derived from the well-known open source software movement. As a contribution to the first steps of research in this discipline a clear...... definition for OSD is proposed and used to describe the key elements of a suggested OSD Process model. Several case studies are analysed to create an Archetypal Business Model characterising OSD of tangible products and the possibilities and delimitations within. Furthermore, strategic tools are suggested...

  17. Data from thermal testing of the Open Source Cryostage

    DEFF Research Database (Denmark)

    Buch, Johannes Lørup; Ramløv, Hans

    2016-01-01

    The data presented here is related to the research article "An open source cryostage and software analysis method for detection of antifreeze activity" (Buch and Ramløv, 2016) [1]. The design of the Open Source Cryostage (OSC) is tested in terms of thermal limits, thermal efficiency and electrical...... efficiency. This article furthermore includes an overview of the electrical circuitry and a flowchart of the software program controlling the temperature of the OSC. The thermal efficiency data is presented here as degrees per volt and maximum cooling capacity....

  18. Impact of Open Source software on the environmental protection

    Directory of Open Access Journals (Sweden)

    D. Viduka

    2015-03-01

    Full Text Available Ongoing development of computer hardware contributes to the constant throwing old computers ie. direct increase of electric and electronic equipment waste. This type of waste is a major threat to human health and the environment. By applying Open Source software solutions all users of computer hardware can significantly effect on the reduction of this type of waste. The aim of this paper is to present the advantages of using Open Source software package in terms of preserving and protecting the environment. This paper presents the results of testing MS Windows and Linux operating systems on an older computer, the results are obtained by applying the benchmark software GeekBench.

  19. Open source and DIY hardware for DNA nanotechnology labs.

    Science.gov (United States)

    Damase, Tulsi R; Stephens, Daniel; Spencer, Adam; Allen, Peter B

    A set of instruments and specialized equipment is necessary to equip a laboratory to work with DNA. Reducing the barrier to entry for DNA manipulation should enable and encourage new labs to enter the field. We present three examples of open source/DIY technology with significantly reduced costs relative to commercial equipment. This includes a gel scanner, a horizontal PAGE gel mold, and a homogenizer for generating DNA-coated particles. The overall cost savings obtained by using open source/DIY equipment was between 50 and 90%.

  20. The Challenges of Open Source Software in IT Adoption

    DEFF Research Database (Denmark)

    Holm Larsen, Michael; Holck, Jesper; Pedersen, Mogens Kuhn

    2004-01-01

    Abstract: The paper presents an explorative study of Open Source Software (OSS) focusing on the managerial decisions for acquisition of OSS. Based on three case studies we argue that whereas small organizations often may chose adoption of OSS expecting significant cost savings, a major barrier...... for larger organizations' adoption of OSS lies in the organizations' consolidation of the enterprise architectures, in addition to that OSS will not be adopted before satisfactory delivery and procurement models for OSS are established. Keywords: Open Source Software, OSS, Enterprise Architecture, Total Cost...

  1. Data from thermal testing of the Open Source Cryostage

    Directory of Open Access Journals (Sweden)

    Johannes Lørup Buch

    2016-09-01

    Full Text Available The data presented here is related to the research article “An open source cryostage and software analysis method for detection of antifreeze activity” (Buch and Ramløv, 2016 [1]. The design of the Open Source Cryostage (OSC is tested in terms of thermal limits, thermal efficiency and electrical efficiency. This article furthermore includes an overview of the electrical circuitry and a flowchart of the software program controlling the temperature of the OSC. The thermal efficiency data is presented here as degrees per volt and maximum cooling capacity.

  2. Open source and DIY hardware for DNA nanotechnology labs

    Directory of Open Access Journals (Sweden)

    Tulsi R. Damase

    2015-08-01

    Full Text Available A set of instruments and specialized equipment is necessary to equip a laboratory to work with DNA. Reducing the barrier to entry for DNA manipulation should enable and encourage new labs to enter the field. We present three examples of open source/DIY technology with significantly reduced costs relative to commercial equipment. This includes a gel scanner, a horizontal PAGE gel mold, and a homogenizer for generating DNA-coated particles. The overall cost savings obtained by using open source/DIY equipment was between 50 and 90%.

  3. Human genome and open source: balancing ethics and business.

    Science.gov (United States)

    Marturano, Antonio

    2011-01-01

    The Human Genome Project has been completed thanks to a massive use of computer techniques, as well as the adoption of the open-source business and research model by the scientists involved. This model won over the proprietary model and allowed a quick propagation and feedback of research results among peers. In this paper, the author will analyse some ethical and legal issues emerging by the use of such computer model in the Human Genome property rights. The author will argue that the Open Source is the best business model, as it is able to balance business and human rights perspectives.

  4. Assessment of Anterior Segment Measurements with Swept Source Optical Coherence Tomography before and after Ab Interno Trabeculotomy (Trabectome) Surgery

    Science.gov (United States)

    Huang, Ping

    2016-01-01

    Purpose. To compare the changes of anterior segment parameters, assessed by swept source anterior segment optical coherence tomography (AS-OCT) after combined Trabectome-cataract surgery and Trabectome-only surgery in open angle glaucoma patients. Methods. Thirty-eight eyes of 24 patients with open angle glaucoma were scanned with swept source AS-OCT before and 4 weeks after combined Trabectome-cataract or Trabectome-only surgery. Intraocular pressure, number of medications, and AS-OCT parameters, such as angle opening distance at 500 and 750 μm from the scleral spur (AOD500 and AOD750), trabecular-iris space area at 500 and 750 mm2 (TISA500, TISA750), angle recess area at 500 and 750 mm2 (ARA500, ARA750), trabecular iris angle (TIA), anterior chamber depth (ACD), anterior chamber width (ACW), and anterior chamber volume (ACV), were obtained before the surgery. These parameters were compared to evaluate whether the outcome of the surgery differed among the patients after the surgery. The width of the trabecular cleft was also measured for both groups. Results. The reduction of IOP and number of medications was found to be statistically significant in both groups (p ACV, and angle parameters such as AOD 500/750, TISA 500/750, ARA 500/750, and TIA500 showed significantly greater changes from the preoperative values to postoperative 1st month values in combined Trabectome-cataract surgery group (p 0.05). There was no statistically significant difference between two groups for the width of the trabecular cleft (p = 0.7). Conclusion. Anterior chamber angle parameters measured with swept source AS-OCT may be useful for evaluating glaucoma patients before and after Trabectome surgery with or without cataract surgery. PMID:27795855

  5. Pentaho Business Analytics: a Business Intelligence Open Source Alternative

    Directory of Open Access Journals (Sweden)

    Diana TÂRNĂVEANU

    2012-10-01

    Full Text Available Most organizations strive to obtain fast, interactive and insightful analytics in order to fundament the most effective and profitable decisions. They need to incorporate huge amounts of data in order to run analysis based on queries and reports with collaborative capabilities. The large variety of Business Intelligence solutions on the market makes it very difficult for organizations to select one and evaluate the impact of the selected solution to the organization. The need of a strategy to help organization chose the best solution for investment emerges. In the past, Business Intelligence (BI market was dominated by closed source and commercial tools, but in the last years open source solutions developed everywhere. An Open Source Business Intelligence solution can be an option due to time-sensitive, sprawling requirements and tightening budgets. This paper presents a practical solution implemented in a suite of Open Source Business Intelligence products called Pentaho Business Analytics, which provides data integration, OLAP services, reporting, dashboarding, data mining and ETL capabilities. The study conducted in this paper suggests that the open source phenomenon could become a valid alternative to commercial platforms within the BI context.

  6. OpenFLUID: an open-source software environment for modelling fluxes in landscapes

    Science.gov (United States)

    Fabre, Jean-Christophe; Rabotin, Michaël; Crevoisier, David; Libres, Aline; Dagès, Cécile; Moussa, Roger; Lagacherie, Philippe; Raclot, Damien; Voltz, Marc

    2013-04-01

    Integrative landscape functioning has become a common concept in environmental management. Landscapes are complex systems where many processes interact in time and space. In agro-ecosystems, these processes are mainly physical processes, including hydrological-processes, biological processes and human activities. Modelling such systems requires an interdisciplinary approach, coupling models coming from different disciplines, developed by different teams. In order to support collaborative works, involving many models coupled in time and space for integrative simulations, an open software modelling platform is a relevant answer. OpenFLUID is an open source software platform for modelling landscape functioning, mainly focused on spatial fluxes. It provides an advanced object-oriented architecture allowing to i) couple models developed de novo or from existing source code, and which are dynamically plugged to the platform, ii) represent landscapes as hierarchical graphs, taking into account multi-scale, spatial heterogeneities and landscape objects connectivity, iii) run and explore simulations in many ways : using the OpenFLUID software interfaces for users (command line interface, graphical user interface), or using external applications such as GNU R through the provided ROpenFLUID package. OpenFLUID is developed in C++ and relies on open source libraries only (Boost, libXML2, GLib/GTK, OGR/GDAL, …). For modelers and developers, OpenFLUID provides a dedicated environment for model development, which is based on an open source toolchain, including the Eclipse editor, the GCC compiler and the CMake build system. OpenFLUID is distributed under the GPLv3 open source license, with a special exception allowing to plug existing models licensed under any license. It is clearly in the spirit of sharing knowledge and favouring collaboration in a community of modelers. OpenFLUID has been involved in many research applications, such as modelling of hydrological network

  7. Virtual Machine for Computer Forensics - the Open Source Perspective

    Science.gov (United States)

    Bem, Derek

    In this paper we discuss the potential role of virtual environments in the analysis phase of computer forensics investigations. We argue that commercial closed source computer forensics software has certain limitations, and we propose a method which may lead to gradual shift to open source software (OSS). A brief overview of virtual environments and open source software tools is presented and discussed. Further we identify current limitations of virtual environments leading to the conclusion that the method is very promising, but at this point in time it can not replace conventional techniques of computer forensics analysis. We demonstrate that using Virtual Machines (VM) in Linux environments can complement the conventional techniques, and often can bring faster and verifiable results not dependent on proprietary, close source tools.

  8. OpenMC In Situ Source Convergence Detection

    Energy Technology Data Exchange (ETDEWEB)

    Aldrich, Garrett Allen [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of California, Davis, CA (United States); Dutta, Soumya [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); The Ohio State Univ., Columbus, OH (United States); Woodring, Jonathan Lee [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2016-05-07

    We designed and implemented an in situ version of particle source convergence for the OpenMC particle transport simulator. OpenMC is a Monte Carlo based-particle simulator for neutron criticality calculations. For the transport simulation to be accurate, source particles must converge on a spatial distribution. Typically, convergence is obtained by iterating the simulation by a user-settable, fixed number of steps, and it is assumed that convergence is achieved. We instead implement a method to detect convergence, using the stochastic oscillator for identifying convergence of source particles based on their accumulated Shannon Entropy. Using our in situ convergence detection, we are able to detect and begin tallying results for the full simulation once the proper source distribution has been confirmed. Our method ensures that the simulation is not started too early, by a user setting too optimistic parameters, or too late, by setting too conservative a parameter.

  9. Commencing open heart surgery in resource limited countries: lessons from the LASUTH experience.

    Science.gov (United States)

    Oludara, Mobolaji Adewale; Nwiloh, Jonathan; Fabamwo, Adetokunbo; Adebola, Phillip

    2014-01-01

    The challenge of commencing cardiac surgery in developing countries of Africa is onerous. We present a model from the experience of carrying out open cardiac surgical procedures at the Lagos State University Teaching Hospital (LASUTH) with three separate missions between 2004 and 2006. This paper details the challenges of starting open heart surgery in a resource limited environment. We propose that owing to the huge financial investment needed, government sponsorship as well as collaboration with overseas based and local non-governmental agencies may be required to jump start the process of open cardiac surgery. Local staff training opportunities are also provided by such missions and this can further be complemented by overseas exposure in areas of need for capacity building. In our centre, the initial investment has led to the recruitment of additional trained staff including 2 cardiothoracic surgeons. Further benefits of training of 2 perfusionists and a nurse has improved capacity in cardiac surgery service at our center.

  10. An open-source framework for testing tracking devices using Lego Mindstorms

    Science.gov (United States)

    Jomier, Julien; Ibanez, Luis; Enquobahrie, Andinet; Pace, Danielle; Cleary, Kevin

    2009-02-01

    In this paper, we present an open-source framework for testing tracking devices in surgical navigation applications. At the core of image-guided intervention systems is the tracking interface that handles communication with the tracking device and gathers tracking information. Given that the correctness of tracking information is critical for protecting patient safety and for ensuring the successful execution of an intervention, the tracking software component needs to be thoroughly tested on a regular basis. Furthermore, with widespread use of extreme programming methodology that emphasizes continuous and incremental testing of application components, testing design becomes critical. While it is easy to automate most of the testing process, it is often more difficult to test components that require manual intervention such as tracking device. Our framework consists of a robotic arm built from a set of Lego Mindstorms and an open-source toolkit written in C++ to control the robot movements and assess the accuracy of the tracking devices. The application program interface (API) is cross-platform and runs on Windows, Linux and MacOS. We applied this framework for the continuous testing of the Image-Guided Surgery Toolkit (IGSTK), an open-source toolkit for image-guided surgery and shown that regression testing on tracking devices can be performed at low cost and improve significantly the quality of the software.

  11. Does previous open renal surgery or percutaneous nephrolithotomy affect the outcomes and complications of percutaneous nephrolithotomy.

    Science.gov (United States)

    Ozgor, Faruk; Kucuktopcu, Onur; Sarılar, Omer; Toptas, Mehmet; Simsek, Abdulmuttalip; Gurbuz, Zafer Gokhan; Akbulut, Mehmet Fatih; Muslumanoglu, Ahmet Yaser; Binbay, Murat

    2015-11-01

    In this study, we aim to evaluate the effectiveness and safety of PNL in patients with a history of open renal surgery or PNL by comparing with primary patients and to compare impact of previous open renal surgery and PNL on the success and complications of subsequent PNL. Charts of patients, who underwent PNL at our institute, were analyzed retrospectively. Patients were divided into three groups according to history of renal stone surgery. Patients without history of renal surgery were enrolled into Group 1. Other patients with previous PNL and previous open surgery were categorized as Group 2 and Group 3. Preoperative characteristic, perioperative data, stone-free status, and complication rates were compared between the groups. Stone-free status was accepted as completing clearance of stone and residual fragment smaller than 4 mm. Eventually, 2070 patients were enrolled into the study. Open renal surgery and PNL had been done in 410 (Group 2) and 131 (Group 3) patients, retrospectively. The mean operation time was longer (71.3 ± 33.5 min) in Group 2 and the mean fluoroscopy time was longer (8.6 ± 5.0) in Group 3 but there was no statistically significant difference between the groups. Highest stone clearance was achieved in primary PNL patients (81.62%) compared to the other groups (77.10% in Group 2 and 75.61% in Group 3). Stone-free rate was not significantly different between Group 2 and Group 3. Fever, pulmonary complications, and blood transfusion requirement were not statically different between groups but angioembolization was significantly higher in Group 2. Percutaneous nephrolithotomy is a safe and effective treatment modality for patients with renal stones regardless history of previous PNL or open renal surgery. However, history of open renal surgery but not PNL significantly reduced PNL success.

  12. Open aortic surgery after thoracic endovascular aortic repair.

    Science.gov (United States)

    Coselli, Joseph S; Spiliotopoulos, Konstantinos; Preventza, Ourania; de la Cruz, Kim I; Amarasekara, Hiruni; Green, Susan Y

    2016-08-01

    In the last decade, thoracic endovascular aortic aneurysm repair (TEVAR) has emerged as an appealing alternative to the traditional open aortic aneurysm repair. This is largely due to generally improved early outcomes associated with TEVAR, including lower perioperative mortality and morbidity. However, it is relatively common for patients who undergo TEVAR to need a secondary intervention. In select circumstances, these secondary interventions are performed as an open procedure. Although it is difficult to assess the rate of open repairs after TEVAR, the rates in large series of TEVAR cases (>300) have ranged from 0.4 to 7.9 %. Major complications of TEVAR that typically necessitates open distal aortic repair (i.e., repair of the descending thoracic or thoracoabdominal aorta) include endoleak (especially type I), aortic fistula, endograft infection, device collapse or migration, and continued expansion of the aneurysm sac. Conversion to open repair of the distal aorta may be either elective (as for many endoleaks) or emergent (as for rupture, retrograde complicated dissection, malperfusion, and endograft infection). In addition, in select patients (e.g., those with a chronic aortic dissection), unrepaired sections of the aorta may progressively dilate, resulting in the need for multiple distal aortic repairs. Open repairs after TEVAR can be broadly classified as full extraction, partial extraction, or full salvage of the stent-graft. Although full and partial stent-graft extraction imply failure of TEVAR, such failure is generally absent in cases where the stent-graft can be fully salvaged. We review the literature regarding open repair after TEVAR and highlight operative strategies.

  13. Open surgery versus retroperitoneal laparoscopic nephrectomy for renal tuberculosis: a retrospective study of 120 patients

    Directory of Open Access Journals (Sweden)

    Su Zhang

    2016-11-01

    Full Text Available Background Laparoscopic renal surgery has been widely used in the treatment of renal diseases. However, there is still little research about its application in addressing renal tuberculosis. The purpose of this study is to retrospectively investigate the surgical results of laparoscopic and open surgery for nonfunctional tuberculous kidneys. Methods Between May 2011 and June 2016, 120 nephrectomies were performed in patients with a nonfunctional tuberculous kidney. Of these, 69 patients underwent retroperitoneal laparoscopic nephrectomy, and 51 patients underwent open nephrectomy. Data about the patients’ characteristics and surgical outcomes were collected from their electronic medical records. Outcomes were compared between these two groups. Results Our results showed that a number of renal tuberculosis patients presented no significant symptoms during their disease. Lower urinary tract symptoms (LUTS were the most common at a rate of 73/120, followed by flank pain or accidently discovery (66/120, urine abnormality (30/120 and fever (27/120. Patients who underwent open surgery were similar to laparoscopic patients with regard to sex, BMI, location, previous tuberculous history, grade, anemia, adhesion, hypertension, diabetes and preoperative serum creatinine level, but were generally older than laparoscopic patients. There were no significant differences between open and laparoscopic surgery in estimated blood loss, transfusion, postoperative hospital days and perioperative complication rate. However, the median operation time of laparoscopic operation was much longer than open surgery (180 [150–225] vs 135 [120–165] minutes, P < 0.01. Seven of the 69 laparoscopic operations were converted to open surgery because of severe adhesions. Conclusion Laparoscopic nephrectomy is as an effective treatment as open surgery for a nonfunctional tuberculous kidney, although it requires more time during the surgical procedure. No significant

  14. Open-source software for generating electrocardiogram signals

    CERN Document Server

    McSharry, P E; Sharry, Patrick E. Mc; Cifford, Gari D.

    2004-01-01

    ECGSYN, a dynamical model that faithfully reproduces the main features of the human electrocardiogram (ECG), including heart rate variability, RR intervals and QT intervals is presented. Details of the underlying algorithm and an open-source software implementation in Matlab, C and Java are described. An example of how this model will facilitate comparisons of signal processing techniques is provided.

  15. Open Source Projects in Software Engineering Education: A Mapping Study

    Science.gov (United States)

    Nascimento, Debora M. C.; Almeida Bittencourt, Roberto; Chavez, Christina

    2015-01-01

    Context: It is common practice in academia to have students work with "toy" projects in software engineering (SE) courses. One way to make such courses more realistic and reduce the gap between academic courses and industry needs is getting students involved in open source projects (OSP) with faculty supervision. Objective: This study…

  16. The Case for Open Source Software in Digital Forensics

    Science.gov (United States)

    Zanero, Stefano; Huebner, Ewa

    In this introductory chapter we discuss the importance of the use of open source software (OSS), and in particular of free software (FLOSS) in computer forensics investigations including the identification, capture, preservation and analysis of digital evidence; we also discuss the importance of OSS in computer forensics

  17. The Economics of Open Source Software Development: An Introduction

    DEFF Research Database (Denmark)

    2006-01-01

    This chapter introduces the fundamentals of Open Source Software, its nature, the central economic aspects and the key mechanisms of its development. Furthermore, we present the themes of the book and provide a first overview for the reader by giving short summaries of its chapters....

  18. Digital Preservation in Open-Source Digital Library Software

    Science.gov (United States)

    Madalli, Devika P.; Barve, Sunita; Amin, Saiful

    2012-01-01

    Digital archives and digital library projects are being initiated all over the world for materials of different formats and domains. To organize, store, and retrieve digital content, many libraries as well as archiving centers are using either proprietary or open-source software. While it is accepted that print media can survive for centuries with…

  19. Zotero : a free and open-source reference manager

    DEFF Research Database (Denmark)

    Courraud, Julie

    2014-01-01

    Zotero is a free, open-source reference management program compatible with Linux®, Mac®, and Windows® operating systems. Libraries are backed up online allowing sharing between computers and even multiple users. Zotero makes it easy to keep your reference library organised and ‘clean’. Reference...

  20. Open Source Software: All You Do Is Put It Together

    NARCIS (Netherlands)

    Obrenovic, Z.; Gasevic, D.

    2007-01-01

    The authors propose an infrastructure for rapidly prototyping applications from open source software components. The Adaptable Multi-Interface Communicator infrastructure (AMICO) is based on ideas of middleware platforms for component integration, but it focuses on pragmatic aspects of OSS integrati

  1. Exploring Coordination Structures in Open Source Software Development

    NARCIS (Netherlands)

    Amrit, Chintan; Hegeman, J.H.; Hillegersberg, van Jos; Hillegersberg, van Jos; Harmsen, Frank; Amrit, Chintan; Geisberger, Eva; Keil, Patrick; Kuhrmann, Marco

    2007-01-01

    Coordination is difficult to achieve in a large globally distributed project setting. The problem is multiplied in open source software development projects, where most of the traditional means of coordination such as plans, system-level designs, schedules and defined process are not used. In order

  2. Critical Analysis on Open Source LMSs Using FCA

    Science.gov (United States)

    Sumangali, K.; Kumar, Ch. Aswani

    2013-01-01

    The objective of this paper is to apply Formal Concept Analysis (FCA) to identify the best open source Learning Management System (LMS) for an E-learning environment. FCA is a mathematical framework that represents knowledge derived from a formal context. In constructing the formal context, LMSs are treated as objects and their features as…

  3. Crux: rapid open source protein tandem mass spectrometry analysis.

    Science.gov (United States)

    McIlwain, Sean; Tamura, Kaipo; Kertesz-Farkas, Attila; Grant, Charles E; Diament, Benjamin; Frewen, Barbara; Howbert, J Jeffry; Hoopmann, Michael R; Käll, Lukas; Eng, Jimmy K; MacCoss, Michael J; Noble, William Stafford

    2014-10-03

    Efficiently and accurately analyzing big protein tandem mass spectrometry data sets requires robust software that incorporates state-of-the-art computational, machine learning, and statistical methods. The Crux mass spectrometry analysis software toolkit ( http://cruxtoolkit.sourceforge.net ) is an open source project that aims to provide users with a cross-platform suite of analysis tools for interpreting protein mass spectrometry data.

  4. Intrinsic Motivation versus Signaling in Open Source Software Development

    DEFF Research Database (Denmark)

    Bitzer, J; Schrettl, W; Schröder, P

    This papers sheds light on the puzzling fact that even though open source software (OSS) is a public good, it is developed for free by highly qualified, young, motivated individuals, and evolves at a rapid pace. We show that when OSS development is understood as the private provision of a public...

  5. Is Open Source the ERP Cure-All?

    Science.gov (United States)

    Panettieri, Joseph C.

    2008-01-01

    Conventional and hosted applications thrive, but open source ERP (enterprise resource planning) is coming on strong. In many ways, the evolution of the ERP market is littered with ironies. When Oracle began buying up customer relationship management (CRM) and ERP companies, some universities worried that they would be left with fewer choices and…

  6. The Value of Open Source Software Tools in Qualitative Research

    Science.gov (United States)

    Greenberg, Gary

    2011-01-01

    In an era of global networks, researchers using qualitative methods must consider the impact of any software they use on the sharing of data and findings. In this essay, I identify researchers' main areas of concern regarding the use of qualitative software packages for research. I then examine how open source software tools, wherein the publisher…

  7. Critical Analysis on Open Source LMSs Using FCA

    Science.gov (United States)

    Sumangali, K.; Kumar, Ch. Aswani

    2013-01-01

    The objective of this paper is to apply Formal Concept Analysis (FCA) to identify the best open source Learning Management System (LMS) for an E-learning environment. FCA is a mathematical framework that represents knowledge derived from a formal context. In constructing the formal context, LMSs are treated as objects and their features as…

  8. Digital Preservation in Open-Source Digital Library Software

    Science.gov (United States)

    Madalli, Devika P.; Barve, Sunita; Amin, Saiful

    2012-01-01

    Digital archives and digital library projects are being initiated all over the world for materials of different formats and domains. To organize, store, and retrieve digital content, many libraries as well as archiving centers are using either proprietary or open-source software. While it is accepted that print media can survive for centuries with…

  9. Higher Education Sub-Cultures and Open Source Adoption

    Science.gov (United States)

    van Rooij, Shahron Williams

    2011-01-01

    Successful adoption of new teaching and learning technologies in higher education requires the consensus of two sub-cultures, namely the technologist sub-culture and the academic sub-culture. This paper examines trends in adoption of open source software (OSS) for teaching and learning by comparing the results of a 2009 survey of 285 Chief…

  10. ARLearn - Open source mobile application platform for learning

    NARCIS (Netherlands)

    Börner, Dirk; Ternier, Stefaan; Klemke, Roland; Schmitz, Birgit; Kalz, Marco; Tabuenca, Bernardo; Specht, Marcus

    2013-01-01

    Börner, D., Ternier, S., Klemke, R., Schmitz, B., Kalz, M., Tabuenca, B., & Specht, M. (2013). ARLearn - Open source mobile application platform for learning. In D. Hernández-Leo et al. (Eds.), Scaling up Learning for Sustained Impact. Proceedings of the 8th European Conference on Technology Enhance

  11. Open Source Projects in Software Engineering Education: A Mapping Study

    Science.gov (United States)

    Nascimento, Debora M. C.; Almeida Bittencourt, Roberto; Chavez, Christina

    2015-01-01

    Context: It is common practice in academia to have students work with "toy" projects in software engineering (SE) courses. One way to make such courses more realistic and reduce the gap between academic courses and industry needs is getting students involved in open source projects (OSP) with faculty supervision. Objective: This study…

  12. Large Data Visualization with Open-Source Tools

    CERN Document Server

    CERN. Geneva

    2015-01-01

    Visualization and post-processing of large data have become increasingly challenging and require more and more tools to support the diversity of data to process. In this seminar, we will present a suite of open-source tools supported and developed by Kitware to perform large-scale data visualization and analysis. In particular, we will present ParaView, an open-source tool for parallel visualization of massive datasets, the Visualization Toolkit (VTK), an open-source toolkit for scientific visualization, and Tangelohub, a suite of tools for large data analytics. About the speaker Julien Jomier is directing Kitware's European subsidiary in Lyon, France, where he focuses on European business development. Julien works on a variety of projects in the areas of parallel and distributed computing, mobile computing, image processing, and visualization. He is one of the developers of the Insight Toolkit (ITK), the Visualization Toolkit (VTK), and ParaView. Julien is also leading the CDash project, an open-source co...

  13. Chinese Localisation of Evergreen: An Open Source Integrated Library System

    Science.gov (United States)

    Zou, Qing; Liu, Guoying

    2009-01-01

    Purpose: The purpose of this paper is to investigate various issues related to Chinese language localisation in Evergreen, an open source integrated library system (ILS). Design/methodology/approach: A Simplified Chinese version of Evergreen was implemented and tested and various issues such as encoding, indexing, searching, and sorting…

  14. Higher Education Sub-Cultures and Open Source Adoption

    Science.gov (United States)

    van Rooij, Shahron Williams

    2011-01-01

    Successful adoption of new teaching and learning technologies in higher education requires the consensus of two sub-cultures, namely the technologist sub-culture and the academic sub-culture. This paper examines trends in adoption of open source software (OSS) for teaching and learning by comparing the results of a 2009 survey of 285 Chief…

  15. Open-Source Urbanism: Creating, Multiplying and Managing Urban Commons

    Directory of Open Access Journals (Sweden)

    Karin Bradley

    2015-06-01

    Full Text Available Within contemporary architecture and urbanism there is marked interest in urban commons. This paper explores the creation of temporary urban commons, or, more specifically, what can be called ‘open-source urbanism’. Citing two practices – urban commons initiated by Atelier d’architecture autogérée in Paris, and Park(ing Day initiated by San Francisco-based Rebar – I argue that these practices can be understood as open-source urbanism since their initiators act as open-source programmers, constructing practice manuals to be freely copied, used, developed and shared, thus producing self-managed commons. Although this tradition of ‘commoning’ is not new, it is currently being reinvented with the use of digital technologies. Combining Elinor Ostrom’s analysis of self-managed natural resource commons with Yochai Benkler’s assertion that commons-based peer production constitutes a ‘third mode of production’ that lies beyond capitalism, socialism and their blends, I argue that open-source urbanism critiques both government and privately-led urban development by advancing a form of postcapitalist urbanism.

  16. Dazzling new light source opens at Stanford synchrotron radiation laboratory

    CERN Multimedia

    2004-01-01

    SPEAR3, the Stanford Positron Electron Asymmetric Ring, was formally opened at a dedication ceremony at the Stanford Linear Accelerator Center on Jan. 29. It incorporates the latest technology to make it competitive with the best synchrotron sources in the world (1/2 page)

  17. Is Open Source the ERP Cure-All?

    Science.gov (United States)

    Panettieri, Joseph C.

    2008-01-01

    Conventional and hosted applications thrive, but open source ERP (enterprise resource planning) is coming on strong. In many ways, the evolution of the ERP market is littered with ironies. When Oracle began buying up customer relationship management (CRM) and ERP companies, some universities worried that they would be left with fewer choices and…

  18. Zotero : a free and open-source reference manager

    DEFF Research Database (Denmark)

    Courraud, Julie

    2014-01-01

    Zotero is a free, open-source reference management program compatible with Linux®, Mac®, and Windows® operating systems. Libraries are backed up online allowing sharing between computers and even multiple users. Zotero makes it easy to keep your reference library organised and ‘clean’. Reference...

  19. An Organizational Perspective on Free and Open Source Software Development

    DEFF Research Database (Denmark)

    Vujovic, Sladjana; Ulhøi, John Parm

    2006-01-01

    , there are various combinations or hybrids, in the following referred to as free/open source-based (F/OS-based) agency. In the discussions, practical examples from software production are included. In conclusion, the paper identifies avenues for future research as well as important managerial and policy implications....

  20. The Homo Sacer of open-source journalism

    DEFF Research Database (Denmark)

    Hansen, Ejvind

    2015-01-01

    In this article I discuss the democratic implications of a journalistic turn towards some of the ideals hosted in the open-source movements. I argue that such a turn would be, from the egalitarian and democratic points of view, of real benefit, since it seems to facilitate a dissolution of severa...

  1. Open-source intelligence and privacy by design

    NARCIS (Netherlands)

    Koops, B.J.; Hoepman, J.H.; Leenes, R.

    2013-01-01

    As demonstrated by other papers on this issue, open-source intelligence (OSINT) by state authorities poses challenges for privacy protection and intellectual-property enforcement. A possible strategy to address these challenges is to adapt the design of OSINT tools to embed normative requirements, i

  2. Open Source and Proprietary Project Management Tools for SMEs.

    Directory of Open Access Journals (Sweden)

    Veronika Abramova

    2017-05-01

    Full Text Available The dimensional growth and increasing difficulty in project management promoted the development of different tools that serve to facilitate project management and track project schedule, resources and overall progress. These tools offer a variety of features, from task and time management, up to integrated CRM (Customer Relationship Management and ERP (Enterprise Resource Planning modules. Currently, a large number of project management software is available, to assist project team during the entire project lifecycle. We present the main differences between open source and proprietary project management tools and how those could be important for SMEs, describing the key features and how those can assist the project manager and the development team. In this paper, we analyse four open-source project management tools: OpenProject, ProjectLibre, Redmine, LibrePlan and four proprietary tools: Bitrix24, JIRA, Microsoft Project and Asana.

  3. Computer aided die design: A new open-source methodology

    Science.gov (United States)

    Carneiro, Olga Sousa; Rajkumar, Ananth; Ferrás, Luís Lima; Fernandes, Célio; Sacramento, Alberto; Nóbrega, João Miguel

    2017-05-01

    In this work we present a detailed description of how to use open source based computer codes to aid the design of complex profile extrusion dies, aiming to improve its flow distribution. The work encompasses the description of the overall open-source die design methodology, the implementation of the energy conservation equation in an existing OpenFOAM® solver, which will be then capable of simulating the steady non-isothermal flow of an incompressible generalized Newtonian fluid, and two case studies to illustrate the capabilities and practical usefulness of the developed methodology. The results obtained with these case studies, used to solve real industrial problems, demonstrate that the computational design aid is an excellent alternative, from economical and technical points of view, to the experimental trial-and-error procedure commonly used in industry.

  4. Applying open source innovation approaches in developing business innovation

    DEFF Research Database (Denmark)

    Aagaard, Annabeth; Lindgren, Peter

    2015-01-01

    More and more companies are pursuing continuous innovation through different types of open source innovation and across different partners. The growing interest in open innovation (OI) originates both from the academic community as well as amongst practitioners motivating further investigation...... of effective OI and its different applications. One of the OI applications receiving growing attention is the use of innovation contests in developing business model innovations. However little theoretical knowledge exists and limited empirical research has been performed on OI and how this is facilitated...... and managed effectively in developing business model innovation. The aim of this paper is therefore to close this research gap and to provide new knowledge within the research field of OI and OI applications. Thus, in the present study we explore the facilitation and management of open source innovation...

  5. Analyzing huge pathology images with open source software.

    Science.gov (United States)

    Deroulers, Christophe; Ameisen, David; Badoual, Mathilde; Gerin, Chloé; Granier, Alexandre; Lartaud, Marc

    2013-06-06

    Digital pathology images are increasingly used both for diagnosis and research, because slide scanners are nowadays broadly available and because the quantitative study of these images yields new insights in systems biology. However, such virtual slides build up a technical challenge since the images occupy often several gigabytes and cannot be fully opened in a computer's memory. Moreover, there is no standard format. Therefore, most common open source tools such as ImageJ fail at treating them, and the others require expensive hardware while still being prohibitively slow. We have developed several cross-platform open source software tools to overcome these limitations. The NDPITools provide a way to transform microscopy images initially in the loosely supported NDPI format into one or several standard TIFF files, and to create mosaics (division of huge images into small ones, with or without overlap) in various TIFF and JPEG formats. They can be driven through ImageJ plugins. The LargeTIFFTools achieve similar functionality for huge TIFF images which do not fit into RAM. We test the performance of these tools on several digital slides and compare them, when applicable, to standard software. A statistical study of the cells in a tissue sample from an oligodendroglioma was performed on an average laptop computer to demonstrate the efficiency of the tools. Our open source software enables dealing with huge images with standard software on average computers. They are cross-platform, independent of proprietary libraries and very modular, allowing them to be used in other open source projects. They have excellent performance in terms of execution speed and RAM requirements. They open promising perspectives both to the clinician who wants to study a single slide and to the research team or data centre who do image analysis of many slides on a computer cluster. The virtual slide(s) for this article can be found here

  6. Open Ephys: an open-source, plugin-based platform for multichannel electrophysiology

    Science.gov (United States)

    Siegle, Joshua H.; Cuevas López, Aarón; Patel, Yogi A.; Abramov, Kirill; Ohayon, Shay; Voigts, Jakob

    2017-08-01

    Objective. Closed-loop experiments, in which causal interventions are conditioned on the state of the system under investigation, have become increasingly common in neuroscience. Such experiments can have a high degree of explanatory power, but they require a precise implementation that can be difficult to replicate across laboratories. We sought to overcome this limitation by building open-source software that makes it easier to develop and share algorithms for closed-loop control. Approach. We created the Open Ephys GUI, an open-source platform for multichannel electrophysiology experiments. In addition to the standard ‘open-loop’ visualization and recording functionality, the GUI also includes modules for delivering feedback in response to events detected in the incoming data stream. Importantly, these modules can be built and shared as plugins, which makes it possible for users to extend the functionality of the GUI through a simple API, without having to understand the inner workings of the entire application. Main results. In combination with low-cost, open-source hardware for amplifying and digitizing neural signals, the GUI has been used for closed-loop experiments that perturb the hippocampal theta rhythm in a phase-specific manner. Significance. The Open Ephys GUI is the first widely used application for multichannel electrophysiology that leverages a plugin-based workflow. We hope that it will lower the barrier to entry for electrophysiologists who wish to incorporate real-time feedback into their research.

  7. Open Drug Discovery Toolkit (ODDT): a new open-source player in the drug discovery field.

    Science.gov (United States)

    Wójcikowski, Maciej; Zielenkiewicz, Piotr; Siedlecki, Pawel

    2015-01-01

    There has been huge progress in the open cheminformatics field in both methods and software development. Unfortunately, there has been little effort to unite those methods and software into one package. We here describe the Open Drug Discovery Toolkit (ODDT), which aims to fulfill the need for comprehensive and open source drug discovery software. The Open Drug Discovery Toolkit was developed as a free and open source tool for both computer aided drug discovery (CADD) developers and researchers. ODDT reimplements many state-of-the-art methods, such as machine learning scoring functions (RF-Score and NNScore) and wraps other external software to ease the process of developing CADD pipelines. ODDT is an out-of-the-box solution designed to be easily customizable and extensible. Therefore, users are strongly encouraged to extend it and develop new methods. We here present three use cases for ODDT in common tasks in computer-aided drug discovery. Open Drug Discovery Toolkit is released on a permissive 3-clause BSD license for both academic and industrial use. ODDT's source code, additional examples and documentation are available on GitHub (https://github.com/oddt/oddt).

  8. Open Ephys: an open-source, plugin-based platform for multichannel electrophysiology.

    Science.gov (United States)

    Siegle, Joshua H; López, Aarón Cuevas; Patel, Yogi A; Abramov, Kirill; Ohayon, Shay; Voigts, Jakob

    2017-02-07

    Closed-loop experiments, in which causal interventions are conditioned on the state of the system under investigation, have become increasingly common in neuroscience. Such experiments can have a high degree of explanatory power, but they require a precise implementation that can be difficult to replicate across laboratories. We sought to overcome this limitation by building open-source software that makes it easier to develop and share algorithms for closed-loop control. We created the Open Ephys GUI, an open-source platform for multichannel electrophysiology experiments. In addition to the standard 'open-loop' visualization and recording functionality, the GUI also includes modules for delivering feedback in response to events detected in the incoming data stream. Importantly, these modules can be built and shared as plugins, which makes it possible for users to extend the functionality of the GUI through a simple API, without having to understand the inner workings of the entire application. In combination with low-cost, open-source hardware for amplifying and digitizing neural signals, the GUI has been used for closed-loop experiments that perturb the hippocampal theta rhythm in a phase-specific manner. The Open Ephys GUI is the first widely used application for multichannel electrophysiology that leverages a plugin-based workflow. We hope that it will lower the barrier to entry for electrophysiologists who wish to incorporate real-time feedback into their research.

  9. COMPARISON OF OPEN-SOURCE PAAS ARCHITECTURAL COMPONENTS

    Directory of Open Access Journals (Sweden)

    Mohan Krishna Varma Nandimandalam

    2016-01-01

    Full Text Available Cloud computing is a widely used technology with three basic service models such as Software as a Service (SaaS, Platform as a Service (PaaS, and Infrastructure as a Service (IaaS. This paper focuses on the PaaS model. Open source PaaS model provides choice of cloud, developer framework and application service. In this paper detailed study of four open PaaS packages such as AppScale, Cloud Foundry, Cloudify, and OpenShift are explained with the considerable architectural component aspects. We also explained some other PaaS packages like Stratos, Stakato and mOSAIC briefly. In this paper we present the comparative study of major open PaaS packages.

  10. [The management of infectious mediastinitis after the open heart surgery].

    Science.gov (United States)

    Imada, T; Morishige, N; Nonaka, K; Yamanaka, J

    2000-03-01

    Between October of 1992 and September of 1998, we performed 604 open heart operations. Among them, 12 cases (1.9%) were complicated with postoperative infectious mediastinitis. Five patients (Group A) were treated by conservative therapy which consists of open drainage and intermittent closed irrigation with dilute povidone iodine solution. Seven patients (Group B) were treated surgically in addition to the above-mentioned conservative treatment. Among those patients, one patient developed fatal complication. We have realized that mental care of the patients was also very important when long term hospitalization was necessitated. The hyperbaric oxygen therapy seemed to be also effective for postoperative mediastinitis caused by MRSA.

  11. OpenMS: a flexible open-source software platform for mass spectrometry data analysis.

    Science.gov (United States)

    Röst, Hannes L; Sachsenberg, Timo; Aiche, Stephan; Bielow, Chris; Weisser, Hendrik; Aicheler, Fabian; Andreotti, Sandro; Ehrlich, Hans-Christian; Gutenbrunner, Petra; Kenar, Erhan; Liang, Xiao; Nahnsen, Sven; Nilse, Lars; Pfeuffer, Julianus; Rosenberger, George; Rurik, Marc; Schmitt, Uwe; Veit, Johannes; Walzer, Mathias; Wojnar, David; Wolski, Witold E; Schilling, Oliver; Choudhary, Jyoti S; Malmström, Lars; Aebersold, Ruedi; Reinert, Knut; Kohlbacher, Oliver

    2016-08-30

    High-resolution mass spectrometry (MS) has become an important tool in the life sciences, contributing to the diagnosis and understanding of human diseases, elucidating biomolecular structural information and characterizing cellular signaling networks. However, the rapid growth in the volume and complexity of MS data makes transparent, accurate and reproducible analysis difficult. We present OpenMS 2.0 (http://www.openms.de), a robust, open-source, cross-platform software specifically designed for the flexible and reproducible analysis of high-throughput MS data. The extensible OpenMS software implements common mass spectrometric data processing tasks through a well-defined application programming interface in C++ and Python and through standardized open data formats. OpenMS additionally provides a set of 185 tools and ready-made workflows for common mass spectrometric data processing tasks, which enable users to perform complex quantitative mass spectrometric analyses with ease.

  12. Open Source Software Reliability Growth Model by Considering Change- Point

    Directory of Open Access Journals (Sweden)

    Mashaallah Basirzadeh

    2012-01-01

    Full Text Available The modeling technique for Software Reliability is reaching its prosperity. Software reliability growth models have been used extensively for closed source software. The design and development of open source software (OSS is different from closed source software. We observed some basic characteristics for open source software like (i more instructions execution and code coverage taking place with respect to time, (ii release early, release often (iii frequent addition of patches (iv heterogeneity in fault density and effort expenditure (v Frequent release activities seem to have changed the bug dynamics significantly (vi Bug reporting on bug tracking system drastically increases and decreases. Due to this reason bug reported on bug tracking system keeps an irregular state and fluctuations. Therefore, fault detection/removal process can not be smooth and may be changed at some time point called change-point. In this paper, an instructions executed dependent software reliability growth model has been developed by considering change-point in order to cater diverse and huge user profile, irregular state of bug tracking system and heterogeneity in fault distribution. We have analyzed actual software failure count data to show numerical examples of software reliability assessment for the OSS. We also compare our model with the conventional in terms of goodness-of-fit for actual data. We have shown that the proposed model can assist improvement of quality for OSS systems developed under the open source project.

  13. Cost-utility analysis comparing laparoscopic vs open aortobifemoral bypass surgery

    Directory of Open Access Journals (Sweden)

    Krog AH

    2017-06-01

    Full Text Available Anne Helene Krog,1,2 Mehdi Sahba,3 Erik M Pettersen,4 Torbjørn Wisløff,5,6 Jon O Sundhagen,2 Syed SH Kazmi2 1Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, 2Department of Vascular Surgery, Division of Cardiovascular and Pulmonary Diseases, Oslo University Hospital, Oslo, 3Department of Vascular Surgery, Østfold Central Hospital, Kalnes, 4Department of Vascular Surgery, Sørlandet Hospital HF, Kristiansand, 5Department of Health Management and Health Economics, University of Oslo, 6Norwegian Institute of Public Health, Oslo, Norway Objectives: Laparoscopic aortobifemoral bypass has become an established treatment option for symptomatic aortoiliac obstructive disease at dedicated centers. Minimally invasive surgical techniques like laparoscopic surgery have often been shown to reduce expenses and increase patients’ health-related quality of life. The main objective of our study was to measure quality-adjusted life years (QALYs and costs after totally laparoscopic and open aortobifemoral bypass. Patients and methods: This was a within trial analysis in a larger ongoing randomized controlled prospective multicenter trial, Norwegian Laparoscopic Aortic Surgery Trial. Fifty consecutive patients suffering from symptomatic aortoiliac occlusive disease suitable for aortobifemoral bypass surgery were randomized to either totally laparoscopic (n=25 or open surgical procedure (n=25. One patient dropped out of the study before surgery. We measured health-related quality of life using the EuroQol (EQ-5D-5L questionnaire at 4 different time points, before surgery and for 6 months during follow-up. We calculated the QALYs gained by using the area under the curve for both groups. Costs were calculated based on prices for surgical equipment, vascular prosthesis and hospital stay. Results: We found a significantly higher increase in QALYs after laparoscopic vs open aortobifemoral bypass surgery, with a difference of 0.07 QALYs, (p=0

  14. Large orthotopic reservoir stone burden: Role of open surgery

    Directory of Open Access Journals (Sweden)

    Madbouly Khaled

    2010-01-01

    Full Text Available Purpose: To present our experience in open poucholithotomy as a primary management of large orthotopic reservoir stone burden and discuss different management options. Materials and Methods: Records of men underwent radical cystectomy and orthotopic urinary diversion were retrospectively reviewed as regards pouch stone formation. Patients with large reservoir stone burden managed by open poucholithotomy were further selected. Results: Large reservoir stone burden was encountered in 12 post radical cystectomy men. All underwent open poucholithotomy as a primary management of their reservoir stones. Median age at cystectomy was 46 (range: 32-55 years with a median total follow up period of 214.15 (range: 147-257 months and a median interval to stone detection of 99 (range: 63-132 months. The median stone burden was 5260 (range: 3179-20410 mm 2 . All patients were continent during the day while 5 showed nocturnal enuresis; 2 of them became continent after removal of the stones. Post poucholithotomy, all patients had sterile urine cultures except one who showed occasional colonization. None of the 12 patients showed stone recurrence after poucholithotomy. Two patients underwent revision of a dessuscepted nipple valve in association with stone removal. Conclusions: Open poucholithotomy for large reservoir stone burden is a feasible and safe option. It saves the reservoir mesentery and adjacent bowel. It allows complete removal of the stone(s leaving no residual fragments. Furthermore, it permits correction of concomitant reservoir abnormalities.

  15. Liver Surgery for Hepatocellular Carcinoma: Laparoscopic versus Open Approach

    Directory of Open Access Journals (Sweden)

    C. G. Ker

    2011-01-01

    Full Text Available In this study, we try to compare the benefit of laparoscopic versus open operative procedures. Patients and Methods. One hundred and sixteen patients underwent laparoscopic liver resection (LR and another 208 patients went for open liver resection (OR for hepatocellular carcinoma (HCC. Patients' selection for open or laparoscopic approach was not randomized. Results. The CLIP score for LR and OR was 0.59 ± 0.75 and 0.86 ± 1.04, respectively, (=.016. The operation time was 156.3 ± 308.2 and 190.9 ± 79.2 min for LR and OR groups, respectively. The necessity for blood transfusion was found in 8 patients (6.9% and 106 patients (50.9% for LR and OR groups. Patients resumed full diet on the 2nd and 3rd postoperative day, and the average length of hospital stay was 6 days and 12 days for LR and OR groups. The complication rate and mortality rate were 0% and 6.0%, 2.9% and 30.2% for LR and OR groups, respectively. The 1-yr, 3-yr, and 5-yr survival rate was 87.0%, 70.4%, 62.2% and 83.2%, 76.0%, 71.8% for LR and OR group, respectively, of non-significant difference. From these results, HCC patients accepted laparoscopic or open approach were of no significant differences between their survival rates.

  16. Efficacy of non-penetrating trabecular surgery for open angle glaucoma:a meta-analysis

    Institute of Scientific and Technical Information of China (English)

    程金伟; 马晓晔; 魏锐

    2004-01-01

    Background Non-penetrating trabecular surgery is a new filtrating surgery without opening in ternal trabecular structures. This study was to estimate the overall efficacy of non-penetrating trabecular surgery for open angle glaucoma.Methods The published articles selected for this study were obtained by a computerised Medline and China Biological Medicine Disk search of the literature and a manual search of the bibliographies of relevant articles. Articles meeting the inclusion criteria were reviewed systematically, and the reported data were aggregated using the statistical techniques of meta-analysis.Results A total of 37 articles were included in the meta-analysis. The pooled complete success rates of non-penetrating trabecular surgery with different techniques were: deep sclerectomy single, 69.7% (95% CI: 58.5%-81.0%); deep sclerectomy with collagen implant, 59.4% (95% CI: 47.0%-71.8%); deep sclerectomy with reticulated hyaluronic acid implant, 71.1% (95% CI: 56.8%-85.3%); and viscocanalostomy, 72.0% (95% CI: 57.6%-86.4%). The overall weighted complete success rate of non-penetrating trabecular surgery was 67.8% (95% CI: 61.4%-74.3%).Conclusions Non-penetrating trabecular surgery is the best available therapy method for medically uncontrolled open angle glaucoma with a complete success rate of over 60%. But the different techniques cannot belie the complete success rate of non-penetrating trabecular surgery.

  17. Revision open Bankart surgery after arthroscopic repair for traumatic anterior shoulder instability.

    Science.gov (United States)

    Cho, Nam Su; Yi, Jin Woong; Lee, Bong Gun; Rhee, Yong Girl

    2009-11-01

    Only a few studies have provided homogeneous analysis of open revision surgery after a failed arthroscopic Bankart procedure. Open Bankart revision surgery will be effective in a failed arthroscopic anterior stabilization but inevitably results in a loss of range of motion, especially external rotation. Case series; Level of evidence, 4. Twenty-six shoulders that went through traditional open Bankart repair as revision surgery after a failed arthroscopic Bankart procedure for traumatic anterior shoulder instability were enrolled for this study. The mean patient age at the time of revision surgery was 24 years (range, 16-38 years), and the mean duration of follow-up was 42 months (range, 25-97 months). The preoperative mean range of motion was 173 degrees in forward flexion and 65 degrees in external rotation at the side. After revision surgery, the ranges measured 164 degrees and 55 degrees, respectively (P = .024 and .012, respectively). At the last follow-up, the mean Rowe score was 81 points, with 88.5% of the patients reporting good or excellent results. After revision surgery, redislocation developed in 3 shoulders (11.5%), all of which had an engaging Hill-Sachs lesion and associated hyperlaxity (2+ or greater laxity on the sulcus sign). Open revision Bankart surgery for a failed arthroscopic Bankart repair can provide a satisfactory outcome, including a low recurrence rate and reliable functional return. In open revision Bankart surgery after failed stabilization for traumatic anterior shoulder instability, the surgeon should keep in mind the possibility of a postoperative loss of range of motion and a thorough examination for not only a Bankart lesion but also other associated lesions, including a bone defect or hyperlaxity, to lower the risk of redislocation.

  18. Applications of Open Source 3-D Printing on Small Farms

    Directory of Open Access Journals (Sweden)

    Joshua M. Pearce

    2013-12-01

    Full Text Available There is growing evidence that low-cost open-source 3-D printers can reduce costs by enabling distributed manufacturing of substitutes for both specialty equipment and conventional mass-manufactured products. The rate of 3-D printable designs under open licenses is growing exponentially and there arealready hundreds of designs applicable to small-scale organic farming. It has also been hypothesized that this technology could assist sustainable development in rural communities that rely on small-scale organic agriculture. To gauge the present utility of open-source 3-D printers in this organic farm context both in the developed and developing world, this paper reviews the current open-source designs available and evaluates the ability of low-cost 3-D printers to be effective at reducing the economic costs of farming.This study limits the evaluation of open-source 3-D printers to only the most-developed fused filament fabrication of the bioplastic polylactic acid (PLA. PLA is a strong biodegradable and recyclable thermoplastic appropriate for a range of representative products, which are grouped into five categories of prints: handtools, food processing, animal management, water management and hydroponics. The advantages and shortcomings of applying 3-D printing to each technology are evaluated. The results show a general izabletechnical viability and economic benefit to adopting open-source 3-D printing for any of the technologies, although the individual economic impact is highly dependent on needs and frequency of use on a specific farm. Capital costs of a 3-D printer may be saved from on-farm printing of a single advanced analytical instrument in a day or replacing hundreds of inexpensive products over a year. In order for the full potential of open-source 3-D printing to be realized to assist organic farm economic resiliency and self-sufficiency, future work is outlined in five core areas: designs of 3-D printable objects, 3-D printing

  19. Cause Analysis of Open Surgery Used After Percutaneous Vertebroplasty and Kyphoplasty

    Science.gov (United States)

    Xu, Zhengwei; Hao, Dingjun; Liu, Tuanjiang; He, Baorong; Guo, Hua; He, Limin

    2016-01-01

    Background The aim of this study was to analyze reasons why open surgery was done after percutaneous vertebroplasty and kyphoplasty. Material/Methods Patients (587 vertebral bodies) treated with percutaneous vertebroplasty or kyphoplasty in the Xi’an Honghui Hospital of Shanxi Province from January 2008 to January 2012 were retrospectively analyzed and 13 patients were enrolled in the study. These 13 patients had serious adverse events after percutaneous vertebroplasty or kyphoplasty. Their average age was 64.5 years old. Nine patients had spinal cord injury and 4 had nerve root injury. All the patients underwent open surgery within 4–12 h after definitive diagnosis. Results All 13 cases were followed up (average time 14.1 months, range 3–47 months). Reasons for open surgery included cement extravasation (6 cases, 46.2%), puncture mistake (3 cases, 23.1%), and false selection of indications (4 cases, 30.8%). At last follow-up, skin feeling was better than that before open surgery in 4 cases with nerve root injury, and muscle strength recovered to grade 5 (3 cases) and grade 4 (1 case). In 9 cases with spinal cord injury, 7 patients improved and 2 remained at the same ASIA level. Conclusions The main reasons for open surgery after percutaneous vertebroplasty and kyphoplasty were cement extravasation (the most common reason), puncture mistake, and false selection of indications. PMID:27444135

  20. Transforming High School Classrooms with Free/Open Source Software: "It's Time for an Open Source Software Revolution"

    Science.gov (United States)

    Pfaffman, Jay

    2008-01-01

    Free/Open Source Software (FOSS) applications meet many of the software needs of high school science classrooms. In spite of the availability and quality of FOSS tools, they remain unknown to many teachers and utilized by fewer still. In a world where most software has restrictions on copying and use, FOSS is an anomaly, free to use and to…

  1. Open Source Clinical NLP - More than Any Single System.

    Science.gov (United States)

    Masanz, James; Pakhomov, Serguei V; Xu, Hua; Wu, Stephen T; Chute, Christopher G; Liu, Hongfang

    2014-01-01

    The number of Natural Language Processing (NLP) tools and systems for processing clinical free-text has grown as interest and processing capability have surged. Unfortunately any two systems typically cannot simply interoperate, even when both are built upon a framework designed to facilitate the creation of pluggable components. We present two ongoing activities promoting open source clinical NLP. The Open Health Natural Language Processing (OHNLP) Consortium was originally founded to foster a collaborative community around clinical NLP, releasing UIMA-based open source software. OHNLP's mission currently includes maintaining a catalog of clinical NLP software and providing interfaces to simplify the interaction of NLP systems. Meanwhile, Apache cTAKES aims to integrate best-of-breed annotators, providing a world-class NLP system for accessing clinical information within free-text. These two activities are complementary. OHNLP promotes open source clinical NLP activities in the research community and Apache cTAKES bridges research to the health information technology (HIT) practice.

  2. Proprietary software versus Open Source Software for Education

    Directory of Open Access Journals (Sweden)

    N. Pankaja

    2013-07-01

    Full Text Available The Internet has brought learning "online" and offers many advantages. It is convenient, available at any time of the day, and can be accessed nearly anywhere in the world. Recently, Cloud computing is all the rage. E-Learning offers tremendous potential to increase the availability and convenience of education. Today, online content is varied and can include: text on a website, digital audio, digital video, animated images, and virtual reality environments. This content can be created in a variety of ways by utilizing a variety of authoring tools and softwares. These days, we observe a movement in higher education leading from proprietary software to open source, for e-learning applications (1 In fact, open source software (OSS development can provide the necessary flexibility to combine languages, scripts, learning objects and lesson plans, effectively, without the cost and rigidity of proprietary software. In recent years, numerous open access LMS software‟s have emerged as viable alternatives to costly proprietary and commercial products. Open source software‟s of Content Management Systems (CMS and Learning Management System (LMS are gaining popularity. We weigh the pro‟s and cons of utilizing the OSS and proprietary software in this paper.

  3. OSeMOSYS: The Open Source Energy Modeling System

    Energy Technology Data Exchange (ETDEWEB)

    Howells, Mark, E-mail: mark.i.howells@gmail.com [Royal Institute of Technology (KTH) (Sweden); Rogner, Holger [Planning and Economic Studies Section, International Atomic Energy Agency (Austria); Strachan, Neil [Energy Institute, University College London (United Kingdom); Heaps, Charles [Stockholm Environmental Institute (SEI) (United States); Huntington, Hillard [Stanford University (United States); Kypreos, Socrates [Paul Scherrer Institute (Switzerland); Hughes, Alison [Energy Research Centre, University of Cape Town (South Africa); Silveira, Semida [Royal Institute of Technology (KTH) (Sweden); DeCarolis, Joe [North Carolina State University (United States); Bazillian, Morgan [United Nations Industrial Development Organization (UNIDO) (Austria); Roehrl, Alexander [United Nations Department of Economic and Social Affairs (UNDESA) (United States)

    2011-10-15

    This paper discusses the design and development of the Open Source Energy Modeling System (OSeMOSYS). It describes the model's formulation in terms of a 'plain English' description, algebraic formulation, implementation-in terms of its full source code, as well as a detailed description of the model inputs, parameters, and outputs. A key feature of the OSeMOSYS implementation is that it is contained in less than five pages of documented, easily accessible code. Other existing energy system models that do not have this emphasis on compactness and openness makes the barrier to entry by new users much higher, as well as making the addition of innovative new functionality very difficult. The paper begins by describing the rationale for the development of OSeMOSYS and its structure. The current preliminary implementation of the model is then demonstrated for a discrete example. Next, we explain how new development efforts will build on the existing OSeMOSYS codebase. The paper closes with thoughts regarding the organization of the OSeMOSYS community, associated capacity development efforts, and linkages to other open source efforts including adding functionality to the LEAP model. - Highlights: > OSeMOSYS is a new free and open source energy systems. > This model is written in a simple, open, flexible and transparent manner to support teaching. > OSeMOSYS is based on free software and optimizes using a free solver. > This model replicates the results of many popular tools, such as MARKAL. > A link between OSeMOSYS and LEAP has been developed.

  4. Preoperative autologous plateletpheresis in patients undergoing open heart surgery.

    Directory of Open Access Journals (Sweden)

    Tomar Akhlesh

    2003-01-01

    Full Text Available Blood conservation is an important aspect of care provided to the patients undergoing cardiac operations with cardiopulmonary bypass (CPB. It is even more important in patients with anticipated prolonged CPB, redo cardiac surgery, patients having negative blood group and in patients undergoing emergency cardiac surgery. In prolonged CPB the blood is subjected to more destruction of important coagulation factors, in redo surgery the separation of adhesions leads to increased bleeding and difficulty in achieving the haemostasis and in patients with negative blood group and emergency operations, the availability of sufficient blood can be a problem. Harvesting the autologous platelet rich plasma (PRP can be a useful method of blood conservation in these patients. The above four categories of patients were prospectively studied, using either autologous whole blood donation or autologous platelet rich plasma (PRP harvest in the immediate pre-bypass period. Forty two patients were included in the study and randomly divided into two equal groups of 21 each, control group (Group I in which one unit of whole blood was withdrawn, and PRP group (Group II where autologous plateletpheresis was utilised. After reversal of heparin, autologous whole blood was transfused in the control group and autologous PRP was transfused in the PRP group. The chest tube drainage and the requirement of homologous blood and blood products were recorded. Average PRP harvest was 643.33 +/- 133.51 mL in PRP group and the mean whole blood donation was 333.75 +/- 79.58 mL in the control group. Demographic, preoperative and intra operative data showed no statistically significant differences between the two groups. The PRP group patients drained 26.44% less (p<0.001 and required 38.5% less homologous blood and blood products (p<0.05, in the postoperative period. Haemoglobin levels on day zero (day of operation and day three were statistically not different between the two groups. We

  5. Confidentiality, Integrity and High Availability with Open Source IT green

    CERN Document Server

    Guimaraes, Luciana

    2008-01-01

    This paper presents elements that form the structure of a network of data using secure stable and mature technologies that meet the requirement of having code free. The principle would be conflicting code open Tuesday where he wants to keep maximum control over the data but is already evidence that open source does not hide the famous backdoor possible in closed systems code. Basearemos this work experience gained in a real environment and using paravirtualization to show a situation more critical and now real in most companies, the virtualization of servers.

  6. Free Open Source Software in Electronics Engineering Education: A Survey

    Directory of Open Access Journals (Sweden)

    Vijay Nehra

    2014-05-01

    Full Text Available Since the last two decades, much attention has been paid to Electronics Engineering (EE education in India. Various commercial software tools and simulator such as mathematical application packages, electronics CAD tools, learning management systems, multimedia tools and general purpose tools supports EE education. Traditionally, proprietary software packages such as OrCAD Pspice, MATLAB, LabView, Multisim and others too are widely practiced and well integrated in electronics engineering curricula of various Universities nationwide. In today’s market, there are plenty of software tools and packages; however, most of them are expensive. The high cost of standard commercial packages is often hardship for students and faculties. Selecting various appropriate tools for academic use is considered as one of the key challenges in EE education. Over recent years, an alternative trend based on Free Open Source Software (FOSS has gained momentum in higher education due to several benefits such as cost, license management flexibility, access to source code, security and stability etc. Presently, a plethora of open source software tools and resource related to EE can be deployed in teaching and learning process of EE education. In this communication, a short exposition of Free Open Source Software useful in electronics engineering education and research is presented. A brief outlook of FOSS packages, their web addresses and major highlights are also presented. The overall aim of this paper is to create awareness among instructors and students to impart active and self learning using FOSS.

  7. Harvesting, Integrating and Distributing Large Open Geospatial Datasets Using Free and Open-Source Software

    Science.gov (United States)

    Oliveira, Ricardo; Moreno, Rafael

    2016-06-01

    Federal, State and Local government agencies in the USA are investing heavily on the dissemination of Open Data sets produced by each of them. The main driver behind this thrust is to increase agencies' transparency and accountability, as well as to improve citizens' awareness. However, not all Open Data sets are easy to access and integrate with other Open Data sets available even from the same agency. The City and County of Denver Open Data Portal distributes several types of geospatial datasets, one of them is the city parcels information containing 224,256 records. Although this data layer contains many pieces of information it is incomplete for some custom purposes. Open-Source Software were used to first collect data from diverse City of Denver Open Data sets, then upload them to a repository in the Cloud where they were processed using a PostgreSQL installation on the Cloud and Python scripts. Our method was able to extract non-spatial information from a `not-ready-to-download' source that could then be combined with the initial data set to enhance its potential use.

  8. A Dozen Years after Open Source's 1998 Birth, It's Time for "OpenTechComm"

    Science.gov (United States)

    Still, Brian

    2010-01-01

    2008 marked the 10-year Anniversary of the Open Source movement, which has had a substantial impact on not only software production and adoption, but also on the sharing and distribution of information. Technical communication as a discipline has taken some advantage of the movement or its derivative software, but this article argues not as much…

  9. Opening Up to Open Source: Looking at How Moodle Was Adopted in Higher Education

    Science.gov (United States)

    Costello, Eamon

    2013-01-01

    The virtual learning environment (VLE) has grown to become a piece of complex infrastructure that is now deemed critical to higher educational provision. This paper looks at Moodle and its adoption in higher education. Moodle's origins, as an open source VLE, are investigated and its growth examined in the context of how higher educational…

  10. Going open source: some lessons learned from the development of OpenRecLink.

    Science.gov (United States)

    Camargo Jr, Kenneth Rochel de; Coeli, Claudia Medina

    2015-02-01

    Record linkage is the process of identifying and merging records across different databases belonging to the same entity. The health sector is one of the pioneering areas of record linkage techniques applications. In 1998 we began the development of a software package, called RecLink that implemented probabilistic record linkage techniques. In this article we report the development of a new, open-source version of that program, now named OpenRecLink. The aim of this article is to present the main characteristics of the new version and some of the lessons learned during its development. The new version is a total rewrite of the program, based on three goals: (1) to migrate to a free and open source software (FOSS) platform; (2) to implement a multiplatform version; (3) to implement the support for internationalization. We describe the tools that we adopted, the process of development and some of the problems encountered.

  11. Going open source: some lessons learned from the development of OpenRecLink

    Directory of Open Access Journals (Sweden)

    Kenneth Rochel de Camargo Jr.

    2015-02-01

    Full Text Available Record linkage is the process of identifying and merging records across different databases belonging to the same entity. The health sector is one of the pioneering areas of record linkage techniques applications. In 1998 we began the development of a software package, called RecLink that implemented probabilistic record linkage techniques. In this article we report the development of a new, open-source version of that program, now named OpenRecLink. The aim of this article is to present the main characteristics of the new version and some of the lessons learned during its development. The new version is a total rewrite of the program, based on three goals: (1 to migrate to a free and open source software (FOSS platform; (2 to implement a multiplatform version; (3 to implement the support for internationalization. We describe the tools that we adopted, the process of development and some of the problems encountered.

  12. [Unexplained right-sided heart failure following open heart surgery: mind the pericardium].

    Science.gov (United States)

    Swinkels, B M; Braam, R L; Rensing, B J W M; Jaarsma, W; Defauw, J J A M; Plokker, H W M

    2008-08-30

    Three men, aged 67 years, 80 years and 53 years, respectively, developed signs and symptoms of progressive right-sided heart failure following open heart surgery. They were diagnosed with constrictive pericarditis based on echocardiography, cardiac magnetic resonance and cardiac catheterisation. Following pericardiectomy, two of the patients fully recovered, while one, the 80-year-old man, died during convalescence. When signs and symptoms of progressive right-sided heart failure develop after open heart surgery, a diagnosis of constrictive pericarditis should be considered. Constrictive pericarditis after open heart surgery may be caused by inflammation of the pericardium; an old, fibrotic haemopericardium, which may be diffuse or loculated; pericardial adhesions; or a combination of these entities. Diagnosing constrictive pericarditis is difficult and may take a long time. However, it is important to recognise this disorder early before it has progressed to an advanced stage. Pericardiectomy is the only effective therapy. When performed too late, survival is significantly reduced.

  13. Comparison of Laparoscopic Adrenalectomy with Open Surgery for Adrenal Tumors

    Directory of Open Access Journals (Sweden)

    Hsun-Shuan Wang

    2009-08-01

    Full Text Available The role of laparoscopy in the management of adrenal tumors is well established. However, there are very few head-to-head comparisons between laparoscopic and open methods at the same institution. We retrospectively evaluated the operative and postoperative parameters of laparoscopic adrenalectomy for adrenal tumors and compared the results with those of traditional open adrenalectomy. Eighty-eight patients with adrenal tumors underwent adrenalectomy between January 1997 and October 2008 at our institute. Clinical data were retrospectively collected after assigning the patients into Group I (n = 51, who underwent the laparoscopic method, and Group II (n = 37, who underwent the traditional open method, by reviewing the patients' charts and related data. Patients in Group I experienced significantly less blood loss (88.6 ± 93.0 mL vs. 321.4 ± 265.4mL, p < 0.01, shorter hospital stay (6.7 ± 4.3 days vs. 11.3 ± 5.4 days, p < 0.01 and earlier oral intake (1.5 ± 0.6 daysvs. 2.2 ± 0.8 days, p < 0.01 postoperatively. In Group I, eight patients had adrenal tumors larger than 6 cm and no statistically significant differences were found compared with the other patients in Group I. Two patients in Group I had malignancies and no local or port site recurrence was found at regular follow-up. There was no mortality in either group. Laparoscopic adrenalectomy is a safe, effective and minimally invasive approach with the advantages of better cosmesis, less blood loss, shorter hospital stay and more rapid recovery. We recommend that laparoscopic adrenalectomy is considered as the gold standard procedure for adrenal tumors, irrespective of whether the tumor is benign or malignant.

  14. Open surgery versus retroperitoneal laparoscopic nephrectomy for renal tuberculosis: a retrospective study of 120 patients.

    Science.gov (United States)

    Zhang, Su; Luo, You; Wang, Cheng; Xiong, Hu; Fu, Sheng-Jun; Yang, Li

    2016-01-01

    Laparoscopic renal surgery has been widely used in the treatment of renal diseases. However, there is still little research about its application in addressing renal tuberculosis. The purpose of this study is to retrospectively investigate the surgical results of laparoscopic and open surgery for nonfunctional tuberculous kidneys. Between May 2011 and June 2016, 120 nephrectomies were performed in patients with a nonfunctional tuberculous kidney. Of these, 69 patients underwent retroperitoneal laparoscopic nephrectomy, and 51 patients underwent open nephrectomy. Data about the patients' characteristics and surgical outcomes were collected from their electronic medical records. Outcomes were compared between these two groups. Our results showed that a number of renal tuberculosis patients presented no significant symptoms during their disease. Lower urinary tract symptoms (LUTS) were the most common at a rate of 73/120, followed by flank pain or accidently discovery (66/120), urine abnormality (30/120) and fever (27/120). Patients who underwent open surgery were similar to laparoscopic patients with regard to sex, BMI, location, previous tuberculous history, grade, anemia, adhesion, hypertension, diabetes and preoperative serum creatinine level, but were generally older than laparoscopic patients. There were no significant differences between open and laparoscopic surgery in estimated blood loss, transfusion, postoperative hospital days and perioperative complication rate. However, the median operation time of laparoscopic operation was much longer than open surgery (180 [150-225] vs 135 [120-165] minutes, P treatment as open surgery for a nonfunctional tuberculous kidney, although it requires more time during the surgical procedure. No significant differences in other surgical outcomes were observed.

  15. A comparative study of challenges in integrating Open Source Software and Inner Source Software

    NARCIS (Netherlands)

    Stol, Klaas-Jan; Babar, Muhammad Ali; Avgeriou, Paris; Fitzgerald, Brian

    2011-01-01

    Context: Several large software-developing organizations have adopted Open Source Software development (OSSD) practices to develop in-house components that are subsequently integrated into products. This phenomenon is also known as "Inner Source". While there have been several reports of successful

  16. Populating a multilingual ontology of proper names from open sources

    Directory of Open Access Journals (Sweden)

    Agata Savary

    2013-11-01

    Full Text Available Even if proper names play a central role in natural language processing (NLP applications they are still under-represented in lexicons, annotated corpora, and other resources dedicated to text processing.  One of the main challenges is both the prevalence and the dynamicity of proper names. At the same time, large and regularly-updated knowledge sources containing partially-structured data, such as Wikipedia or GeoNames, are publicly available and contain large numbers of proper names. We present a method for a semi-automatic enrichment of Prolexbase, an existing multilingual ontology of proper names dedicated to natural language processing, with data extracted from these open sources in three languages: Polish, English and French. Fine-grained data extraction and integration procedures allow the user to enrich previous contents of Prolexbase with new incoming data. All data are manually validated and available under an open licence.

  17. ‡biblios: An Open Source Cataloging Editor

    Directory of Open Access Journals (Sweden)

    Chris Catalfo

    2008-12-01

    Full Text Available ‡biblios is an open source cataloging editor designed to allow libraries to perform copy and original cataloging in a web based environment. ‡biblios allows users to search for, edit, and save bibliographic records in the MARC21/MARCXML formats. It also allows users to send records directly to integrated library systems such as the Koha ILS. Where most MARC editors are part of an integrated library system (and therefore require logging in, ‡biblios allows users to catalog with an open source standalone system available anywhere via a web browser. Unlike other cataloging editors, it offers an attractive user interface for searching, saving and editing cataloging records. This article describes the system architecture and design of ‡biblios.

  18. Open Source Development of Tangible Products - from a business perspective

    DEFF Research Database (Denmark)

    Fjeldsted, Asta S.; Adalsteinsdottir, Gudrun; Howard, Thomas J.;

    for companies that wish to explore the potentials OSD brings which form a so called OSD Method. The result of the method is the OSD Strategy and implementation thereof. This is done with the objective of determining the potential profitability that lies within OSD of tangible products and how companies can......This article’s objective is to set up some foundational theory and practices for Open Source Development (OSD) of tangible products, a novel and emerging approach derived from the well-known open source software movement. As a contribution to the first steps of research in this discipline a clear...... utilise this new approach to improve their business models and capture value in innovative ways....

  19. Comparison of open-source visual analytics toolkits

    Science.gov (United States)

    Harger, John R.; Crossno, Patricia J.

    2012-01-01

    We present the results of the first stage of a two-stage evaluation of open source visual analytics packages. This stage is a broad feature comparison over a range of open source toolkits. Although we had originally intended to restrict ourselves to comparing visual analytics toolkits, we quickly found that very few were available. So we expanded our study to include information visualization, graph analysis, and statistical packages. We examine three aspects of each toolkit: visualization functions, analysis capabilities, and development environments. With respect to development environments, we look at platforms, language bindings, multi-threading/parallelism, user interface frameworks, ease of installation, documentation, and whether the package is still being actively developed.

  20. An open source tool for heart rate variability spectral analysis.

    Science.gov (United States)

    Rodríguez-Liñares, L; Méndez, A J; Lado, M J; Olivieri, D N; Vila, X A; Gómez-Conde, I

    2011-07-01

    In this paper we describe a software package for developing heart rate variability analysis. This package, called RHRV, is a third party extension for the open source statistical environment R, and can be freely downloaded from the R-CRAN repository. We review the state of the art of software related to the analysis of heart rate variability (HRV). Based upon this review, we motivate the development of an open source software platform which can be used for developing new algorithms for studying HRV or for performing clinical experiments. In particular, we show how the RHRV package greatly simplifies and accelerates the work of the computer scientist or medical specialist in the HRV field. We illustrate the utility of our package with practical examples.

  1. Cassandra: An open source Monte Carlo package for molecular simulation.

    Science.gov (United States)

    Shah, Jindal K; Marin-Rimoldi, Eliseo; Mullen, Ryan Gotchy; Keene, Brian P; Khan, Sandip; Paluch, Andrew S; Rai, Neeraj; Romanielo, Lucienne L; Rosch, Thomas W; Yoo, Brian; Maginn, Edward J

    2017-07-15

    Cassandra is an open source atomistic Monte Carlo software package that is effective in simulating the thermodynamic properties of fluids and solids. The different features and algorithms used in Cassandra are described, along with implementation details and theoretical underpinnings to various methods used. Benchmark and example calculations are shown, and information on how users can obtain the package and contribute to it are provided. © 2017 Wiley Periodicals, Inc. © 2017 Wiley Periodicals, Inc.

  2. The Open-Source Alternative in E-Government

    Directory of Open Access Journals (Sweden)

    Catalin Vrabie

    2013-08-01

    Full Text Available The last decade has changed again the face of electronic world: from Web 2.0 to open source software; from e-(electronic to m-(mobile and now to touch. For Web developers is a real challenge to make compatible interfaces to all existing Internet browsers. This proves to be even more expensive than the application itself (Softnet; 2012; SIVECO, 2012. From the point of view of the big software development companies these events are just new challenges because they afford to have many employees with different skills and by that being able to cope with market demands. But what happens with the e-government projects at the local level? Budgets are small, so hiring a company specialized in Web application development is sometimes too expensive, this responsibility usually falls in many cases on the employees of the IT department (Vrabie, 2011. If we add to this software component the hardware required for hosting the Web page inside, the budgets are already completely exceeded (or obviously they can choose some other cheap solution but whose reliability is very poor – reason for dissatisfaction among citizens. The importance of the Web platforms for interacting with citizens is very well known (Friedman, 2005; Craig; 2006; Baltac, 2011. In this context, this paper aims to examine in terms of costs, the investments in open-source applications in parallel with the use of social networks as used today. The research methodology is using for the first time an adapted version of cost-effectiveness analysis. Empirical research will be carried out on two platforms of e-Government – one of them developed inside on an open-source solution - used to support a complete interaction with the citizens. The working hypothesis starts from the fact that open source software is cheaper than those developed inside – but of course this is a question to debate at.

  3. EEG/MEG Source Imaging: Methods, Challenges, and Open Issues

    OpenAIRE

    Katrina Wendel; Outi Väisänen; Jaakko Malmivuo; Gencer, Nevzat G.; Bart Vanrumste; Piotr Durka; Ratko Magjarević; Selma Supek; Mihail Lucian Pascu; Hugues Fontenelle; Rolando Grave de Peralta Menendez

    2009-01-01

    We present the four key areas of research—preprocessing, the volume conductor, the forward problem, and the inverse problem—that affect the performance of EEG and MEG source imaging. In each key area we identify prominent approaches and methodologies that have open issues warranting further investigation within the community, challenges associated with certain techniques, and algorithms necessitating clarification of their implications. More than providing definitive answers we aim to identif...

  4. GISCube, an Open Source Web-based GIS Application

    Science.gov (United States)

    Boustani, M.; Mattmann, C. A.; Ramirez, P.

    2014-12-01

    There are many Earth science projects and data systems being developed at the Jet Propulsion Laboratory, California Institute of Technology (JPL) that require the use of Geographic Information Systems (GIS). Three in particular are: (1) the JPL Airborne Snow Observatory (ASO) that measures the amount of water being generated from snow melt in mountains; (2) the Regional Climate Model Evaluation System (RCMES) that compares climate model outputs with remote sensing datasets in the context of model evaluation and the Intergovernmental Panel on Climate Change and for the U.S. National Climate Assessment and; (3) the JPL Snow Server that produces a snow and ice climatology for the Western US and Alaska, for the U.S. National Climate Assessment. Each of these three examples and all other earth science projects are strongly in need of having GIS and geoprocessing capabilities to process, visualize, manage and store GeoSpatial data. Beside some open source GIS libraries and some software like ArcGIS there are comparatively few open source, web-based and easy to use application that are capable of doing GIS processing and visualization. To address this, we present GISCube, an open source web-based GIS application that can store, visualize and process GIS and GeoSpatial data. GISCube is powered by Geothon, an open source python GIS cookbook. Geothon has a variety of Geoprocessing tools such data conversion, processing, spatial analysis and data management tools. GISCube has the capability of supporting a variety of well known GIS data formats in both vector and raster formats, and the system is being expanded to support NASA's and scientific data formats such as netCDF and HDF files. In this talk, we demonstrate how Earth science and other projects can benefit by using GISCube and Geothon, its current goals and our future work in the area.

  5. A Kernel for Open Source Drug Discovery in Tropical Diseases

    OpenAIRE

    Leticia Ortí; Carbajo, Rodrigo J.; Ursula Pieper; Narayanan Eswar; Maurer, Stephen M.; Rai, Arti K.; Ginger Taylor; Todd, Matthew H; Antonio Pineda-Lucena; Andrej Sali; Marti-Renom, Marc A.

    2009-01-01

    BACKGROUND: Conventional patent-based drug development incentives work badly for the developing world, where commercial markets are usually small to non-existent. For this reason, the past decade has seen extensive experimentation with alternative R&D institutions ranging from private-public partnerships to development prizes. Despite extensive discussion, however, one of the most promising avenues-open source drug discovery-has remained elusive. We argue that the stumbling block has been the...

  6. [Case of neuroleptic malignant syndrome following open heart surgery for thoracic aortic aneurysm with parkinson's disease].

    Science.gov (United States)

    Shinoda, Maiko; Sakamoto, Mik; Shindo, Yuki; Ando, Yumi; Tateda, Takeshi

    2013-12-01

    An 80-year-old woman with Parkinson's disease was scheduled for open heart surgery to repair thoracic aortic aneurysm. Parkinson's symptoms were normally treated using oral levodopa (200 mg), selegiline-hydrochloride (5 mg), bromocriptine-mesilate (2 mg), and amantadine-hydrochloride (200 mg) daily. On the day before surgery, levodopa 50mg was infused intravenously. Another 25 mg of levodopa was infused immediately after surgery. Twenty hours later, the patient developed tremors, heyperventilation, but no obvious muscle rigidity. Two days after surgery, the patient exhibited high fever, hydropoiesis, elevated creatine kinase, and a rise in blood leukocytes. She was diagnosed with neuroleptic malignant syndrome. She was intubated, and received dantrolene sodium. Symptoms of neuroleptic malignant syndrome disappeared on the fourth postoperative day. The stress of open heart surgery, specifically extracorporeal circulation and concomitant dilution of levodopa, triggered neuroleptic malignant syndrome in this patient. Parkinson's patients require higher doses of levodopa prior to surgery to compensate and prevent neuroleptic malignant syndrome after surgery.

  7. Sustainability and social responsibility reporting in open source software

    Directory of Open Access Journals (Sweden)

    Maria Isabel Alonso de Magdaleno

    2015-03-01

    Full Text Available Digital commons have held the interest of the research community in recent years. However, institutional recognition has not been fully awarded mainly due to the absence of a comprehensive reporting framework. The objective of our research is to identify indicators in order to measure open source projects performance. Motivation that led us to carry out this analysis was the fact that, despite the many benefits attributed to open sourcing, no information about it was disclosed on annual reports. We are based on previous literature about creating institutions to governing the commons. One of the key goals is institutional reporting to members of the community, so we believe that a reporting model based on social responsibility framework is clearly suitable for this purpose. Social responsibility and sustainability are about enabling organizations to incorporate creation of social, environmental and economic value into core strategy and operations; their reporting is key to create value for organizations, their stakeholders and society as a whole. To reach our goal, we asked a panel of open source experts their opinion about the key success factors and other relevant variables for the purpose of recommend a methodology to calculate specific indicators to be disclosed on social responsibility reports.

  8. A Survey of Open Source Tools for Business Intelligence

    DEFF Research Database (Denmark)

    Thomsen, Christian; Pedersen, Torben Bach

    The industrial use of open source Business Intelligence (BI) tools is becoming more common, but is still not as widespread as for other types of software.  It is therefore of interest to explore which possibilities are available for open source BI and compare the tools. In this survey paper, we c......The industrial use of open source Business Intelligence (BI) tools is becoming more common, but is still not as widespread as for other types of software.  It is therefore of interest to explore which possibilities...

  9. Open-Source Automated Mapping Four-Point Probe

    Directory of Open Access Journals (Sweden)

    Handy Chandra

    2017-01-01

    Full Text Available Scientists have begun using self-replicating rapid prototyper (RepRap 3-D printers to manufacture open source digital designs of scientific equipment. This approach is refined here to develop a novel instrument capable of performing automated large-area four-point probe measurements. The designs for conversion of a RepRap 3-D printer to a 2-D open source four-point probe (OS4PP measurement device are detailed for the mechanical and electrical systems. Free and open source software and firmware are developed to operate the tool. The OS4PP was validated against a wide range of discrete resistors and indium tin oxide (ITO samples of different thicknesses both pre- and post-annealing. The OS4PP was then compared to two commercial proprietary systems. Results of resistors from 10 to 1 MΩ show errors of less than 1% for the OS4PP. The 3-D mapping of sheet resistance of ITO samples successfully demonstrated the automated capability to measure non-uniformities in large-area samples. The results indicate that all measured values are within the same order of magnitude when compared to two proprietary measurement systems. In conclusion, the OS4PP system, which costs less than 70% of manual proprietary systems, is comparable electrically while offering automated 100 micron positional accuracy for measuring sheet resistance over larger areas.

  10. Open-Source Automated Mapping Four-Point Probe.

    Science.gov (United States)

    Chandra, Handy; Allen, Spencer W; Oberloier, Shane W; Bihari, Nupur; Gwamuri, Jephias; Pearce, Joshua M

    2017-01-26

    Scientists have begun using self-replicating rapid prototyper (RepRap) 3-D printers to manufacture open source digital designs of scientific equipment. This approach is refined here to develop a novel instrument capable of performing automated large-area four-point probe measurements. The designs for conversion of a RepRap 3-D printer to a 2-D open source four-point probe (OS4PP) measurement device are detailed for the mechanical and electrical systems. Free and open source software and firmware are developed to operate the tool. The OS4PP was validated against a wide range of discrete resistors and indium tin oxide (ITO) samples of different thicknesses both pre- and post-annealing. The OS4PP was then compared to two commercial proprietary systems. Results of resistors from 10 to 1 MΩ show errors of less than 1% for the OS4PP. The 3-D mapping of sheet resistance of ITO samples successfully demonstrated the automated capability to measure non-uniformities in large-area samples. The results indicate that all measured values are within the same order of magnitude when compared to two proprietary measurement systems. In conclusion, the OS4PP system, which costs less than 70% of manual proprietary systems, is comparable electrically while offering automated 100 micron positional accuracy for measuring sheet resistance over larger areas.

  11. Open-source, community-driven microfluidics with Metafluidics.

    Science.gov (United States)

    Kong, David S; Thorsen, Todd A; Babb, Jonathan; Wick, Scott T; Gam, Jeremy J; Weiss, Ron; Carr, Peter A

    2017-06-07

    Microfluidic devices have the potential to automate and miniaturize biological experiments, but open-source sharing of device designs has lagged behind sharing of other resources such as software. Synthetic biologists have used microfluidics for DNA assembly, cell-free expression, and cell culture, but a combination of expense, device complexity, and reliance on custom set-ups hampers their widespread adoption. We present Metafluidics, an open-source, community-driven repository that hosts digital design files, assembly specifications, and open-source software to enable users to build, configure, and operate a microfluidic device. We use Metafluidics to share designs and fabrication instructions for both a microfluidic ring-mixer device and a 32-channel tabletop microfluidic controller. This device and controller are applied to build genetic circuits using standard DNA assembly methods including ligation, Gateway, Gibson, and Golden Gate. Metafluidics is intended to enable a broad community of engineers, DIY enthusiasts, and other nontraditional participants with limited fabrication skills to contribute to microfluidic research.

  12. Free and open-source automated 3-D microscope.

    Science.gov (United States)

    Wijnen, Bas; Petersen, Emily E; Hunt, Emily J; Pearce, Joshua M

    2016-11-01

    Open-source technology not only has facilitated the expansion of the greater research community, but by lowering costs it has encouraged innovation and customizable design. The field of automated microscopy has continued to be a challenge in accessibility due the expense and inflexible, noninterchangeable stages. This paper presents a low-cost, open-source microscope 3-D stage. A RepRap 3-D printer was converted to an optical microscope equipped with a customized, 3-D printed holder for a USB microscope. Precision measurements were determined to have an average error of 10 μm at the maximum speed and 27 μm at the minimum recorded speed. Accuracy tests yielded an error of 0.15%. The machine is a true 3-D stage and thus able to operate with USB microscopes or conventional desktop microscopes. It is larger than all commercial alternatives, and is thus capable of high-depth images over unprecedented areas and complex geometries. The repeatability is below 2-D microscope stages, but testing shows that it is adequate for the majority of scientific applications. The open-source microscope stage costs less than 3-9% of the closest proprietary commercial stages. This extreme affordability vastly improves accessibility for 3-D microscopy throughout the world. © 2016 The Authors Journal of Microscopy © 2016 Royal Microscopical Society.

  13. OpenDrift - an open source framework for ocean trajectory modeling

    Science.gov (United States)

    Dagestad, Knut-Frode; Breivik, Øyvind; Ådlandsvik, Bjørn

    2016-04-01

    We will present a new, open source tool for modeling the trajectories and fate of particles or substances (Lagrangian Elements) drifting in the ocean, or even in the atmosphere. The software is named OpenDrift, and has been developed at Norwegian Meteorological Institute in cooperation with Institute of Marine Research. OpenDrift is a generic framework written in Python, and is openly available at https://github.com/knutfrode/opendrift/. The framework is modular with respect to three aspects: (1) obtaining input data, (2) the transport/morphological processes, and (3) exporting of results to file. Modularity is achieved through well defined interfaces between components, and use of a consistent vocabulary (CF conventions) for naming of variables. Modular input implies that it is not necessary to preprocess input data (e.g. currents, wind and waves from Eulerian models) to a particular file format. Instead "reader modules" can be written/used to obtain data directly from any original source, including files or through web based protocols (e.g. OPeNDAP/Thredds). Modularity of processes implies that a model developer may focus on the geophysical processes relevant for the application of interest, without needing to consider technical tasks such as reading, reprojecting, and colocating input data, rotation and scaling of vectors and model output. We will show a few example applications of using OpenDrift for predicting drifters, oil spills, and search and rescue objects.

  14. Natural product-likeness score revisited: an open-source, open-data implementation

    Directory of Open Access Journals (Sweden)

    Jayaseelan Kalai Vanii

    2012-05-01

    Full Text Available Abstract Background Natural product-likeness of a molecule, i.e. similarity of this molecule to the structure space covered by natural products, is a useful criterion in screening compound libraries and in designing new lead compounds. A closed source implementation of a natural product-likeness score, that finds its application in virtual screening, library design and compound selection, has been previously reported by one of us. In this note, we report an open-source and open-data re-implementation of this scoring system, illustrate its efficiency in ranking small molecules for natural product likeness and discuss its potential applications. Results The Natural-Product-Likeness scoring system is implemented as Taverna 2.2 workflows, and is available under Creative Commons Attribution-Share Alike 3.0 Unported License at http://www.myexperiment.org/packs/183.html. It is also available for download as executable standalone java package from http://sourceforge.net/projects/np-likeness/under Academic Free License. Conclusions Our open-source, open-data Natural-Product-Likeness scoring system can be used as a filter for metabolites in Computer Assisted Structure Elucidation or to select natural-product-like molecules from molecular libraries for the use as leads in drug discovery.

  15. Natural product-likeness score revisited: an open-source, open-data implementation.

    Science.gov (United States)

    Jayaseelan, Kalai Vanii; Moreno, Pablo; Truszkowski, Andreas; Ertl, Peter; Steinbeck, Christoph

    2012-05-20

    Natural product-likeness of a molecule, i.e. similarity of this molecule to the structure space covered by natural products, is a useful criterion in screening compound libraries and in designing new lead compounds. A closed source implementation of a natural product-likeness score, that finds its application in virtual screening, library design and compound selection, has been previously reported by one of us. In this note, we report an open-source and open-data re-implementation of this scoring system, illustrate its efficiency in ranking small molecules for natural product likeness and discuss its potential applications. The Natural-Product-Likeness scoring system is implemented as Taverna 2.2 workflows, and is available under Creative Commons Attribution-Share Alike 3.0 Unported License at http://www.myexperiment.org/packs/183.html. It is also available for download as executable standalone java package from http://sourceforge.net/projects/np-likeness/under Academic Free License. Our open-source, open-data Natural-Product-Likeness scoring system can be used as a filter for metabolites in Computer Assisted Structure Elucidation or to select natural-product-like molecules from molecular libraries for the use as leads in drug discovery.

  16. A new chapter in environmental sensing: The Open-Source Published Environmental Sensing (OPENS) laboratory

    Science.gov (United States)

    Selker, J. S.; Roques, C.; Higgins, C. W.; Good, S. P.; Hut, R.; Selker, A.

    2015-12-01

    The confluence of 3-Dimensional printing, low-cost solid-state-sensors, low-cost, low-power digital controllers (e.g., Arduinos); and open-source publishing (e.g., Github) is poised to transform environmental sensing. The Open-Source Published Environmental Sensing (OPENS) laboratory has launched and is available for all to use. OPENS combines cutting edge technologies and makes them available to the global environmental sensing community. OPENS includes a Maker lab space where people may collaborate in person or virtually via on-line forum for the publication and discussion of environmental sensing technology (Corvallis, Oregon, USA, please feel free to request a free reservation for space and equipment use). The physical lab houses a test-bed for sensors, as well as a complete classical machine shop, 3-D printers, electronics development benches, and workstations for code development. OPENS will provide a web-based formal publishing framework wherein global students and scientists can peer-review publish (with DOI) novel and evolutionary advancements in environmental sensor systems. This curated and peer-reviewed digital collection will include complete sets of "printable" parts and operating computer code for sensing systems. The physical lab will include all of the machines required to produce these sensing systems. These tools can be addressed in person or virtually, creating a truly global venue for advancement in monitoring earth's environment and agricultural systems. In this talk we will present an example of the process of design and publication the design and data from the OPENS-Permeameter. The publication includes 3-D printing code, Arduino (or other control/logging platform) operational code; sample data sets, and a full discussion of the design set in the scientific context of previous related devices. Editors for the peer-review process are currently sought - contact John.Selker@Oregonstate.edu or Clement.Roques@Oregonstate.edu.

  17. Open3DALIGN: an open-source software aimed at unsupervised ligand alignment

    Science.gov (United States)

    Tosco, Paolo; Balle, Thomas; Shiri, Fereshteh

    2011-08-01

    An open-source, cross-platform software aimed at conformer generation and unsupervised rigid-body molecular alignment is presented. Different algorithms have been implemented to perform single and multi-conformation superimpositions on one or more templates. Alignments can be accomplished by matching pharmacophores, heavy atoms or a combination of the two. All methods have been successfully validated on eight comprehensive datasets previously gathered by Sutherland and co-workers. High computational performance has been attained through efficient parallelization of the code. The unsupervised nature of the alignment algorithms, together with its scriptable interface, make Open3DALIGN an ideal component of high-throughput, automated cheminformatics workflows.

  18. The effects of listening to preferred music on pain intensity after open heart surgery.

    Science.gov (United States)

    Jafari, Hedayat; Emami Zeydi, Amir; Khani, Soghra; Esmaeili, Ravanbakhsh; Soleimani, Aria

    2012-01-01

    Pain is a common phenomenon after surgery. Cardiac surgeries are no exception and patients generally experience acute pain after these surgeries. Inadequate pain management after cardiac surgery predisposes patients to many complications. Therefore, the aim of this study was to determine the effects of listening to preferred music on pain intensity after open heart surgery. This study was a randomized clinical trial (RCT) conducted in open heart intensive care unit (ICU) of a university hospital in Sari, Iran. A total of 60 patients who were scheduled to undergo open heart surgery were randomly allocated in two groups. Patients in the intervention group (n = 30) listened to their preferred music by headphones for 30 minutes, whereas those in the control group (n = 30) did not listen to music. Using a Numerical Rating Scale (NRS), pain intensity was measured among the patients before the intervention, and immediately, 30 minutes and one hour after the intervention. Data was analyzed by Chi-square test, student's t-test and repeated measures analysis of variance (ANOVA). Mean pain intensity in the intervention group before, immediately after, 30 minutes and one hour after the intervention were 5.8, 3.1, 2.5 and 2.4, respectively. Corresponding numbers in the control group were 4.7, 4.7, 4.8 and 4.9, respectively. Repeated measures ANOVA showed music to significantly reduce pain intensity (p = 0.0001). Music can be effective as a non-pharmacological, inexpensive, non-invasive and side effect free method for pain management after open heart surgery.

  19. A RETROSPECTIVE CLINICAL STUDY OF LAPAROSCOPIC AND OPEN SURGERY FOR CHOLECYSTECTOMY PROCEDURE

    Directory of Open Access Journals (Sweden)

    Konduru Siva Prasada Raju

    2017-03-01

    Full Text Available BACKGROUND The gall stone is one of the commonest ailments for which the hospital doors are knocked in India. Recent statistics suggest that about 15 to 30 percent of women in the fourth and fifth decade of life commonly suffer from this. The gall bladder should not be removed just considering the fact that the stones are there but the stones are formed in it and one major problem is its recurrence. Recent non – operative procedures like shock wave therapy and drugs are non - promising. Minimal access surgery is now the trend in any kind of surgery and cholecystectomy is no exception. Initially there was a huge benefit seen but now more and more complications are reported. In this study an effort has been put to understand the complications involved in both the Laparoscopic and Open type of surgery. This study is intended to help the practicing surgeon to anticipate the commonly involved complications in both the type of surgeries and also to help them understand the pros and cons of each type especially in resource challenged settings. MATERIALS AND METHODS This study was done in the Department of General Surgery in RIMS Medical College at Ongole. This study was done from January 2014 to December 2016. A sample size of 131 patients was selected and the retrospective analysis was done. RESULTS The mean age of the population in the sample size was 44.18 years and the range of the patients included from 10 years to 81 years. There were thirty seven males and ninety four females in the total study population. Female preponderance was seen which was statistically significant. Open surgery is the method of choice in an emergencyod of choice in case of emergency.All twenty three patients who underwent open surgery had significant post operative pain complained of post - operative pain requiring analgesic intervention. Only two patients complained of post – operative pain in case of laparoscopic procedure and none of them needed analgesics. Other

  20. Search Analytics: Automated Learning, Analysis, and Search with Open Source

    Science.gov (United States)

    Hundman, K.; Mattmann, C. A.; Hyon, J.; Ramirez, P.

    2016-12-01

    The sheer volume of unstructured scientific data makes comprehensive human analysis impossible, resulting in missed opportunities to identify relationships, trends, gaps, and outliers. As the open source community continues to grow, tools like Apache Tika, Apache Solr, Stanford's DeepDive, and Data-Driven Documents (D3) can help address this challenge. With a focus on journal publications and conference abstracts often in the form of PDF and Microsoft Office documents, we've initiated an exploratory NASA Advanced Concepts project aiming to use the aforementioned open source text analytics tools to build a data-driven justification for the HyspIRI Decadal Survey mission. We call this capability Search Analytics, and it fuses and augments these open source tools to enable the automatic discovery and extraction of salient information. In the case of HyspIRI, a hyperspectral infrared imager mission, key findings resulted from the extractions and visualizations of relationships from thousands of unstructured scientific documents. The relationships include links between satellites (e.g. Landsat 8), domain-specific measurements (e.g. spectral coverage) and subjects (e.g. invasive species). Using the above open source tools, Search Analytics mined and characterized a corpus of information that would be infeasible for a human to process. More broadly, Search Analytics offers insights into various scientific and commercial applications enabled through missions and instrumentation with specific technical capabilities. For example, the following phrases were extracted in close proximity within a publication: "In this study, hyperspectral images…with high spatial resolution (1 m) were analyzed to detect cutleaf teasel in two areas. …Classification of cutleaf teasel reached a users accuracy of 82 to 84%." Without reading a single paper we can use Search Analytics to automatically identify that a 1 m spatial resolution provides a cutleaf teasel detection users accuracy of 82

  1. Building an open-source robotic stereotaxic instrument.

    Science.gov (United States)

    Coffey, Kevin R; Barker, David J; Ma, Sisi; West, Mark O

    2013-10-29

    This protocol includes the designs and software necessary to upgrade an existing stereotaxic instrument to a robotic (CNC) stereotaxic instrument for around $1,000 (excluding a drill), using industry standard stepper motors and CNC controlling software. Each axis has variable speed control and may be operated simultaneously or independently. The robot's flexibility and open coding system (g-code) make it capable of performing custom tasks that are not supported by commercial systems. Its applications include, but are not limited to, drilling holes, sharp edge craniotomies, skull thinning, and lowering electrodes or cannula. In order to expedite the writing of g-coding for simple surgeries, we have developed custom scripts that allow individuals to design a surgery with no knowledge of programming. However, for users to get the most out of the motorized stereotax, it would be beneficial to be knowledgeable in mathematical programming and G-Coding (simple programming for CNC machining). The recommended drill speed is greater than 40,000 rpm. The stepper motor resolution is 1.8°/Step, geared to 0.346°/Step. A standard stereotax has a resolution of 2.88 μm/step. The maximum recommended cutting speed is 500 μm/sec. The maximum recommended jogging speed is 3,500 μm/sec. The maximum recommended drill bit size is HP 2.

  2. A heterogeneous open ocean source for glyoxal and iodine oxide

    Science.gov (United States)

    Volkamer, R.; Coburn, S.; Dix, B. K.; Lechner, M.; Sinreich, R.; Duhl, T.; Guenther, A. B.

    2010-12-01

    The climate relevance of biologically active ocean upwelling regions has primarily been studied in terms of the air-sea partitioning of long-lived greenhouse gases (e.g., CO2, CH4, N2O etc), and the release of the reactive gas DMS, which can form aerosols as a result of atmospheric transformations. Considerably less attention has been paid to open ocean sources of other reactive gases that, like DMS, can form aerosols. Such molecules are glyoxal (CHOCHO) and IO. Glyoxal is an indicator for oxidative hydrocarbon chemistry, and a building block for secondary organic aerosol (SOA). SOA modifies the hygroscopic properties of organic aerosols, and potentially also adds to the growth of small particles to sizes that can more easily activate to form cloud droplets. Iodine oxide (IO) can nucleate new particles, and/or adds to the growth of pre-existing particles. Due to the very high solubility of the glyoxal molecule, concentrations in excess of 100ppt over the open ocean like we found over the Pacific Ocean require an airborne source mechanism (Sinreich et al., 2010). We have investigated the source mechanism further during a ship campaign in 2009, as well as a first research flight aboard the NSF/NCAR GV research aircraft (HIAPER). Both campaigns give clues about the sources of both gases over the remote tropical Pacific Ocean, and reveal a surprising impact on the composition of the free troposphere.

  3. MicMac GIS application: free open source

    Science.gov (United States)

    Duarte, L.; Moutinho, O.; Teodoro, A.

    2016-10-01

    The use of Remotely Piloted Aerial System (RPAS) for remote sensing applications is becoming more frequent as the technologies on on-board cameras and the platform itself are becoming a serious contender to satellite and airplane imagery. MicMac is a photogrammetric tool for image matching that can be used in different contexts. It is an open source software and it can be used as a command line or with a graphic interface (for each command). The main objective of this work was the integration of MicMac with QGIS, which is also an open source software, in order to create a new open source tool applied to photogrammetry/remote sensing. Python language was used to develop the application. This tool would be very useful in the manipulation and 3D modelling of a set of images. The main objective was to create a toolbar in QGIS with the basic functionalities with intuitive graphic interfaces. The toolbar is composed by three buttons: produce the points cloud, create the Digital Elevation Model (DEM) and produce the orthophoto of the study area. The application was tested considering 35 photos, a subset of images acquired by a RPAS in the Aguda beach area, Porto, Portugal. They were used in order to create a 3D terrain model and from this model obtain an orthophoto and the corresponding DEM. The code is open and can be modified according to the user requirements. This integration would be very useful in photogrammetry and remote sensing community combined with GIS capabilities.

  4. Open source software engineering for geoscientific modeling applications

    Science.gov (United States)

    Bilke, L.; Rink, K.; Fischer, T.; Kolditz, O.

    2012-12-01

    OpenGeoSys (OGS) is a scientific open source project for numerical simulation of thermo-hydro-mechanical-chemical (THMC) processes in porous and fractured media. The OGS software development community is distributed all over the world and people with different backgrounds are contributing code to a complex software system. The following points have to be addressed for successful software development: - Platform independent code - A unified build system - A version control system - A collaborative project web site - Continuous builds and testing - Providing binaries and documentation for end users OGS should run on a PC as well as on a computing cluster regardless of the operating system. Therefore the code should not include any platform specific feature or library. Instead open source and platform independent libraries like Qt for the graphical user interface or VTK for visualization algorithms are used. A source code management and version control system is a definite requirement for distributed software development. For this purpose Git is used, which enables developers to work on separate versions (branches) of the software and to merge those versions at some point to the official one. The version control system is integrated into an information and collaboration website based on a wiki system. The wiki is used for collecting information such as tutorials, application examples and case studies. Discussions take place in the OGS mailing list. To improve code stability and to verify code correctness a continuous build and testing system, based on the Jenkins Continuous Integration Server, has been established. This server is connected to the version control system and does the following on every code change: - Compiles (builds) the code on every supported platform (Linux, Windows, MacOS) - Runs a comprehensive test suite of over 120 benchmarks and verifies the results Runs software development related metrics on the code (like compiler warnings, code complexity

  5. Nowcasting influenza outbreaks using open-source media report.

    Energy Technology Data Exchange (ETDEWEB)

    Ray, Jaideep; Brownstein, John S. [Boston Children%3CU%2B2019%3Es Hospital, Boston, MA

    2013-02-01

    We construct and verify a statistical method to nowcast influenza activity from a time-series of the frequency of reports concerning influenza related topics. Such reports are published electronically by both public health organizations as well as newspapers/media sources, and thus can be harvested easily via web crawlers. Since media reports are timely, whereas reports from public health organization are delayed by at least two weeks, using timely, open-source data to compensate for the lag in %E2%80%9Cofficial%E2%80%9D reports can be useful. We use morbidity data from networks of sentinel physicians (both the Center of Disease Control's ILINet and France's Sentinelles network) as the gold standard of influenza-like illness (ILI) activity. The time-series of media reports is obtained from HealthMap (http://healthmap.org). We find that the time-series of media reports shows some correlation ( 0.5) with ILI activity; further, this can be leveraged into an autoregressive moving average model with exogenous inputs (ARMAX model) to nowcast ILI activity. We find that the ARMAX models have more predictive skill compared to autoregressive (AR) models fitted to ILI data i.e., it is possible to exploit the information content in the open-source data. We also find that when the open-source data are non-informative, the ARMAX models reproduce the performance of AR models. The statistical models are tested on data from the 2009 swine-flu outbreak as well as the mild 2011-2012 influenza season in the U.S.A.

  6. A kernel for open source drug discovery in tropical diseases.

    Directory of Open Access Journals (Sweden)

    Leticia Ortí

    Full Text Available BACKGROUND: Conventional patent-based drug development incentives work badly for the developing world, where commercial markets are usually small to non-existent. For this reason, the past decade has seen extensive experimentation with alternative R&D institutions ranging from private-public partnerships to development prizes. Despite extensive discussion, however, one of the most promising avenues-open source drug discovery-has remained elusive. We argue that the stumbling block has been the absence of a critical mass of preexisting work that volunteers can improve through a series of granular contributions. Historically, open source software collaborations have almost never succeeded without such "kernels". METHODOLOGY/PRINCIPAL FINDINGS: HERE, WE USE A COMPUTATIONAL PIPELINE FOR: (i comparative structure modeling of target proteins, (ii predicting the localization of ligand binding sites on their surfaces, and (iii assessing the similarity of the predicted ligands to known drugs. Our kernel currently contains 143 and 297 protein targets from ten pathogen genomes that are predicted to bind a known drug or a molecule similar to a known drug, respectively. The kernel provides a source of potential drug targets and drug candidates around which an online open source community can nucleate. Using NMR spectroscopy, we have experimentally tested our predictions for two of these targets, confirming one and invalidating the other. CONCLUSIONS/SIGNIFICANCE: The TDI kernel, which is being offered under the Creative Commons attribution share-alike license for free and unrestricted use, can be accessed on the World Wide Web at http://www.tropicaldisease.org. We hope that the kernel will facilitate collaborative efforts towards the discovery of new drugs against parasites that cause tropical diseases.

  7. Technical Evaluation Report 59: The Emergence of Open-Source Software in China

    Directory of Open Access Journals (Sweden)

    Curtis J. Bonk

    2007-03-01

    Full Text Available The open-source software movement is gaining increasing momentum in China. Of the limited numbers of open-source software in China, Red Flag Linux stands out most strikingly, commanding 30 percent share of the Chinese software market. Unlike the spontaneity of open-source movement in North America, open-source software development in China, such as Red Flag Linux, is an orchestrated activity wherein different levels of China's government play a vital role in sponsoring, incubating, and using open-source software, most conspicuously, Red Flag Linux. While there are no reports on open-source course management system in China, there are reports on the study and use of Western open-source course management systems for instruction and learning in Chinese higher education institutions. This paper discusses the current status of open-source software in China, including open-source course management software and associated tools and resources. Importantly, it describes the development model of Red Flag Linux, the most successful open-source software initiative in China. In addition, it explores the possibility of Chinese higher education institutions joining efforts to develop China’s own open-source course management system using the open-source development model established in North America. A timeline of current and major open-source projects of significance in China is provided. The paper concludes with a discussion of the potential for applying the open-source software development model to open and distance education in China.

  8. Impact of mild renal impairment on early postoperative mortality after open cardiac surgery

    Directory of Open Access Journals (Sweden)

    Ghani A

    2010-01-01

    Full Text Available Preoperative severe renal impairment is included in the risk scores to predict out-come after open cardiac surgery. The purpose of this study was to assess the impact of pre-operative mild renal impairment on the early postoperative mortality after open heart surgery. Data of all cases of open cardiac surgery performed from January 2005 to June 2006 were collec-ted. Cases with preoperative creatinine clearance below 60 mL/min were excluded from the study. Data were retrospectively analyzed to find the impact of renal impairment on short-term outcome. Of the 500 cases studied, 47 had preoperative creatinine clearance between 89-60 mL/min. The overall mortality in the study cases was 6.8%. The mortality was 28.7% in those who developed postoperative ARF, 33.3% in those who required dialysis and 40.8% in those with preoperative mild renal impairment. Binary logistic regression analysis showed that female gender (P = 0.01, preoperative mild renal impairment (P = 0.007 as well as occurrence of multi organ failure (P < 0.001 were the only independent variables determining the early postoperative mortality after cardiac surgeries. Among them, preoperative mild renal impairment was the most significant and the best predictor for early postoperative mortality after cardiac surgery. Our study suggests that renal impairment remains a strong predictor of early mortality even after adjustment for several confounders.

  9. GOSH! A roadmap for open-source science hardware

    CERN Multimedia

    Stefania Pandolfi

    2016-01-01

    The goal of the Gathering for Open Science Hardware (GOSH! 2016), held from 2 to 5 March 2016 at IdeaSquare, was to lay the foundations of the open-source hardware for science movement.   The participants in the GOSH! 2016 meeting gathered in IdeaSquare. (Image: GOSH Community) “Despite advances in technology, many scientific innovations are held back because of a lack of affordable and customisable hardware,” says François Grey, a professor at the University of Geneva and coordinator of Citizen Cyberlab – a partnership between CERN, the UN Institute for Training and Research and the University of Geneva – which co-organised the GOSH! 2016 workshop. “This scarcity of accessible science hardware is particularly obstructive for citizen science groups and humanitarian organisations that don’t have the same economic means as a well-funded institution.” Instead, open sourcing science hardware co...

  10. Building an Open Source Framework for Integrated Catchment Modeling

    Science.gov (United States)

    Jagers, B.; Meijers, E.; Villars, M.

    2015-12-01

    In order to develop effective strategies and associated policies for environmental management, we need to understand the dynamics of the natural system as a whole and the human role therein. This understanding is gained by comparing our mental model of the world with observations from the field. However, to properly understand the system we should look at dynamics of water, sediments, water quality, and ecology throughout the whole system from catchment to coast both at the surface and in the subsurface. Numerical models are indispensable in helping us understand the interactions of the overall system, but we need to be able to update and adjust them to improve our understanding and test our hypotheses. To support researchers around the world with this challenging task we started a few years ago with the development of a new open source modeling environment DeltaShell that integrates distributed hydrological models with 1D, 2D, and 3D hydraulic models including generic components for the tracking of sediment, water quality, and ecological quantities throughout the hydrological cycle composed of the aforementioned components. The open source approach combined with a modular approach based on open standards, which allow for easy adjustment and expansion as demands and knowledge grow, provides an ideal starting point for addressing challenging integrated environmental questions.

  11. Hypersonic simulations using open-source CFD and DSMC solvers

    Science.gov (United States)

    Casseau, V.; Scanlon, T. J.; John, B.; Emerson, D. R.; Brown, R. E.

    2016-11-01

    Hypersonic hybrid hydrodynamic-molecular gas flow solvers are required to satisfy the two essential requirements of any high-speed reacting code, these being physical accuracy and computational efficiency. The James Weir Fluids Laboratory at the University of Strathclyde is currently developing an open-source hybrid code which will eventually reconcile the direct simulation Monte-Carlo method, making use of the OpenFOAM application called dsmcFoam, and the newly coded open-source two-temperature computational fluid dynamics solver named hy2Foam. In conjunction with employing the CVDV chemistry-vibration model in hy2Foam, novel use is made of the QK rates in a CFD solver. In this paper, further testing is performed, in particular with the CFD solver, to ensure its efficacy before considering more advanced test cases. The hy2Foam and dsmcFoam codes have shown to compare reasonably well, thus providing a useful basis for other codes to compare against.

  12. Comparison between two portal laparoscopy and open surgery for ovariectomy in dogs.

    Science.gov (United States)

    Shariati, Elnaz; Bakhtiari, Jalal; Khalaj, Alireza; Niasari-Naslaji, Amir

    2014-01-01

    Ovariectomy (OVE) is a routine surgical procedure for neutering in small animal practice. Laparoscopy is a new surgical technique which contains advantages such as less trauma, smaller incision and excellent visualization than traditional open surgery. The present study was conducted to examine the feasibility and safety of laparoscopic procedure through two portal comparing with the conventional open surgery for OVE in healthy female bitches (n=16). Dogs were divided in two equal groups. In laparoscopic group, two 5 and 10 mm portals were inserted; First in the umbilicus for introducing the camera and the second, caudal to the umbilicus for inserting the forceps. Laparoscopic procedure involved grasping and tacking the ovary to the abdominal wall, followed by electrocautery, resection and removal of the ovary. In open surgery, routine OVE was conducted through an incision from umbilicus to caudal midline. Mean operative time, total length of scar, blood loss, clinical and blood parameters and all intra and post-operative complications were recorded in both groups. Mean operative time, total length of scar, blood loss and post-operative adhesions were significantly less in laparoscopic group compared with open surgery. In conclusion, laparoscopic OVE is an acceptable procedure due to more advantages in comparison with traditional OVE.

  13. Treatment of open hand injuries: does timing of surgery matter? A single-centre prospective analysis.

    Science.gov (United States)

    Juon, Bettina H; Iseli, Michelle; Kreutziger, Janett; Constantinescu, Mihai A; Vögelin, Esther

    2014-10-01

    The 6-hour paradigm for surgical treatment of open injuries should be re-evaluated in the era of systematic use of antiseptic solutions and systemic antibiotics. The current study investigates prospectively the impact of timing of surgery on the outcome of open hand injuries. The prospective evaluation included adult patients presenting with open hand injuries between 1 September 2009 and 30 June 2010 to the emergency department of the University Hospital of Berne, Switzerland. Multiple trauma, bilateral hand injuries, bite injuries, and infections were excluded. All patients underwent a standardised treatment protocol with antiseptic solution, sterile dressing, antibiotic prophylaxis, and surgical treatment upon admission. Demographic data, injury details, and delay from trauma to therapy were recorded. Microbiology was gained at surgery. Outcome measurements included infections, complications, pain, and function (clinically, DASH, Mayo score). From 116 patients (mean age 43 years) six patients suffered an infection (5.2%). The observed infections were statistically not associated with delay to surgery, treatment protocol, or to injury complexity. Neither complications, pain, nor functional outcome were statistically associated with delay to surgery, wound disinfection, or administration of antibiotics. In conclusion, early or late timing of surgical treatment of open hand injuries did not show any impact on outcome (infections, complications, pain, function) in this prospective single-centre patient evaluation.

  14. Delayed cardiac tamponade after open heart surgery - is supplemental CT imaging reasonable?

    Science.gov (United States)

    Floerchinger, Bernhard; Camboni, Daniele; Schopka, Simon; Kolat, Philipp; Hilker, Michael; Schmid, Christof

    2013-06-24

    Cardiac tamponade is a severe complication after open heart surgery. Diagnostic imaging is challenging in postoperative patients, especially if tamponade develops with subacute symptoms. Hypothesizing that delayed tamponade after open heart surgery is not sufficiently detected by transthoracic echocardiography, in this study CT scans were used as standard reference and were compared with transthoracic echocardiography imaging in patients with suspected cardiac tamponade. Twenty-five patients after open heart surgery were enrolled in this analysis. In case of suspected cardiac tamponade patients underwent both echocardiography and CT imaging. Using CT as standard of reference sensitivity, specificity, positive and negative predictive values of ultrasound imaging in detecting pericardial effusion/hematoma were analyzed. Clinical appearance of tamponade, need for re-intervention as well as patient outcome were monitored. In 12 cases (44%) tamponade necessitated surgical re-intervention. Most common symptoms were deterioration of hemodynamic status and dyspnea. Sensitivity, specificity, positive and negative predictive values of echocardiography were 75%, 64%, 75%, and 64% for detecting pericardial effusion, and 33%, 83%, 50, and 71% for pericardial hematoma, respectively. In-hospital mortality of the re-intervention group was 50%. Diagnostic accuracy of transthoracic echocardiography is limited in patients after open heart surgery. Suplemental CT imaging provides rapid diagnostic reliability in patients with delayed cardiac tamponade.

  15. Open Polar Server (OPS—An Open Source Infrastructure for the Cryosphere Community

    Directory of Open Access Journals (Sweden)

    Weibo Liu

    2016-03-01

    Full Text Available The Center for Remote Sensing of Ice Sheets (CReSIS at the University of Kansas has collected approximately 1000 terabytes (TB of radar depth sounding data over the Arctic and Antarctic ice sheets since 1993 in an effort to map the thickness of the ice sheets and ultimately understand the impacts of climate change and sea level rise. In addition to data collection, the storage, management, and public distribution of the dataset are also primary roles of the CReSIS. The Open Polar Server (OPS project developed a free and open source infrastructure to store, manage, analyze, and distribute the data collected by CReSIS in an effort to replace its current data storage and distribution approach. The OPS infrastructure includes a spatial database management system (DBMS, map and web server, JavaScript geoportal, and MATLAB application programming interface (API for the inclusion of data created by the cryosphere community. Open source software including GeoServer, PostgreSQL, PostGIS, OpenLayers, ExtJS, GeoEXT and others are used to build a system that modernizes the CReSIS data distribution for the entire cryosphere community and creates a flexible platform for future development. Usability analysis demonstrates the OPS infrastructure provides an improved end user experience. In addition, interpolating glacier topography is provided as an application example of the system.

  16. Open source system OpenVPN in a function of Virtual Private Network

    Science.gov (United States)

    Skendzic, A.; Kovacic, B.

    2017-05-01

    Using of Virtual Private Networks (VPN) can establish high security level in network communication. VPN technology enables high security networking using distributed or public network infrastructure. VPN uses different security and managing rules inside networks. It can be set up using different communication channels like Internet or separate ISP communication infrastructure. VPN private network makes security communication channel over public network between two endpoints (computers). OpenVPN is an open source software product under GNU General Public License (GPL) that can be used to establish VPN communication between two computers inside business local network over public communication infrastructure. It uses special security protocols and 256-bit Encryption and it is capable of traversing network address translators (NATs) and firewalls. It allows computers to authenticate each other using a pre-shared secret key, certificates or username and password. This work gives review of VPN technology with a special accent on OpenVPN. This paper will also give comparison and financial benefits of using open source VPN software in business environment.

  17. Open Plot Project: an open-source toolkit for 3-D structural data analysis

    Directory of Open Access Journals (Sweden)

    S. Tavani

    2011-05-01

    Full Text Available In this work we present the Open Plot Project, an open-source software for structural data analysis, including a 3-D environment. The software includes many classical functionalities of structural data analysis tools, like stereoplot, contouring, tensorial regression, scatterplots, histograms and transect analysis. In addition, efficient filtering tools are present allowing the selection of data according to their attributes, including spatial distribution and orientation. This first alpha release represents a stand-alone toolkit for structural data analysis.

    The presence of a 3-D environment with digitalising tools allows the integration of structural data with information extracted from georeferenced images to produce structurally validated dip domains. This, coupled with many import/export facilities, allows easy incorporation of structural analyses in workflows for 3-D geological modelling. Accordingly, Open Plot Project also candidates as a structural add-on for 3-D geological modelling software.

    The software (for both Windows and Linux O.S., the User Manual, a set of example movies (complementary to the User Manual, and the source code are provided as Supplement. We intend the publication of the source code to set the foundation for free, public software that, hopefully, the structural geologists' community will use, modify, and implement. The creation of additional public controls/tools is strongly encouraged.

  18. openPSTD: The open source pseudospectral time-domain method for acoustic propagation

    Science.gov (United States)

    Hornikx, Maarten; Krijnen, Thomas; van Harten, Louis

    2016-06-01

    An open source implementation of the Fourier pseudospectral time-domain (PSTD) method for computing the propagation of sound is presented, which is geared towards applications in the built environment. Being a wave-based method, PSTD captures phenomena like diffraction, but maintains efficiency in processing time and memory usage as it allows to spatially sample close to the Nyquist criterion, thus keeping both the required spatial and temporal resolution coarse. In the implementation it has been opted to model the physical geometry as a composition of rectangular two-dimensional subdomains, hence initially restricting the implementation to orthogonal and two-dimensional situations. The strategy of using subdomains divides the problem domain into local subsets, which enables the simulation software to be built according to Object-Oriented Programming best practices and allows room for further computational parallelization. The software is built using the open source components, Blender, Numpy and Python, and has been published under an open source license itself as well. For accelerating the software, an option has been included to accelerate the calculations by a partial implementation of the code on the Graphical Processing Unit (GPU), which increases the throughput by up to fifteen times. The details of the implementation are reported, as well as the accuracy of the code.

  19. Clarity: an open-source manager for laboratory automation.

    Science.gov (United States)

    Delaney, Nigel F; Rojas Echenique, José I; Marx, Christopher J

    2013-04-01

    Software to manage automated laboratories, when interfaced with hardware instruments, gives users a way to specify experimental protocols and schedule activities to avoid hardware conflicts. In addition to these basics, modern laboratories need software that can run multiple different protocols in parallel and that can be easily extended to interface with a constantly growing diversity of techniques and instruments. We present Clarity, a laboratory automation manager that is hardware agnostic, portable, extensible, and open source. Clarity provides critical features including remote monitoring, robust error reporting by phone or email, and full state recovery in the event of a system crash. We discuss the basic organization of Clarity, demonstrate an example of its implementation for the automated analysis of bacterial growth, and describe how the program can be extended to manage new hardware. Clarity is mature, well documented, actively developed, written in C# for the Common Language Infrastructure, and is free and open-source software. These advantages set Clarity apart from currently available laboratory automation programs. The source code and documentation for Clarity is available at http://code.google.com/p/osla/.

  20. The Pixhawk Open-Source Computer Vision Framework for Mavs

    Science.gov (United States)

    Meier, L.; Tanskanen, P.; Fraundorfer, F.; Pollefeys, M.

    2011-09-01

    Unmanned aerial vehicles (UAV) and micro air vehicles (MAV) are already intensively used in geodetic applications. State of the art autonomous systems are however geared towards the application area in safe and obstacle-free altitudes greater than 30 meters. Applications at lower altitudes still require a human pilot. A new application field will be the reconstruction of structures and buildings, including the facades and roofs, with semi-autonomous MAVs. Ongoing research in the MAV robotics field is focusing on enabling this system class to operate at lower altitudes in proximity to nearby obstacles and humans. PIXHAWK is an open source and open hardware toolkit for this purpose. The quadrotor design is optimized for onboard computer vision and can connect up to four cameras to its onboard computer. The validity of the system design is shown with a fully autonomous capture flight along a building.

  1. THE PIXHAWK OPEN-SOURCE COMPUTER VISION FRAMEWORK FOR MAVS

    Directory of Open Access Journals (Sweden)

    L. Meier

    2012-09-01

    Full Text Available Unmanned aerial vehicles (UAV and micro air vehicles (MAV are already intensively used in geodetic applications. State of the art autonomous systems are however geared towards the application area in safe and obstacle-free altitudes greater than 30 meters. Applications at lower altitudes still require a human pilot. A new application field will be the reconstruction of structures and buildings, including the facades and roofs, with semi-autonomous MAVs. Ongoing research in the MAV robotics field is focusing on enabling this system class to operate at lower altitudes in proximity to nearby obstacles and humans. PIXHAWK is an open source and open hardware toolkit for this purpose. The quadrotor design is optimized for onboard computer vision and can connect up to four cameras to its onboard computer. The validity of the system design is shown with a fully autonomous capture flight along a building.

  2. Spatial Information Processing: Standards-Based Open Source Visualization Technology

    Science.gov (United States)

    Hogan, P.

    2009-12-01

    . Spatial information intelligence is a global issue that will increasingly affect our ability to survive as a species. Collectively we must better appreciate the complex relationships that make life on Earth possible. Providing spatial information in its native context can accelerate our ability to process that information. To maximize this ability to process information, three basic elements are required: data delivery (server technology), data access (client technology), and data processing (information intelligence). NASA World Wind provides open source client and server technologies based on open standards. The possibilities for data processing and data sharing are enhanced by this inclusive infrastructure for geographic information. It is interesting that this open source and open standards approach, unfettered by proprietary constraints, simultaneously provides for entirely proprietary use of this same technology. 1. WHY WORLD WIND? NASA World Wind began as a single program with specific functionality, to deliver NASA content. But as the possibilities for virtual globe technology became more apparent, we found that while enabling a new class of information technology, we were also getting in the way. Researchers, developers and even users expressed their desire for World Wind functionality in ways that would service their specific needs. They want it in their web pages. They want to add their own features. They want to manage their own data. They told us that only with this kind of flexibility, could their objectives and the potential for this technology be truly realized. World Wind client technology is a set of development tools, a software development kit (SDK) that allows a software engineer to create applications requiring geographic visualization technology. 2. MODULAR COMPONENTRY Accelerated evolution of a technology requires that the essential elements of that technology be modular components such that each can advance independent of the other

  3. OpenSR: An Open-Source Stimulus-Response Testing Framework

    Directory of Open Access Journals (Sweden)

    Carolyn C. Matheus

    2015-01-01

    Full Text Available Stimulus–response (S–R tests provide a unique way to acquire information about human perception by capturing automatic responses to stimuli and attentional processes. This paper presents OpenSR, a user-centered S–R testing framework providing a graphical user interface that can be used by researchers to customize, administer, and manage one type of S–R test, the implicit association test. OpenSR provides an extensible open-source Web-based framework that is platform independent and can be implemented on most computers using any operating system. In addition, it provides capabilities for automatically generating and assigning participant identifications, assigning participants to different condition groups, tracking responses, and facilitating collecting and exporting of data. The Web technologies and languages used in creating the OpenSR framework are discussed, namely, HTML5, CSS3, JavaScript, jQuery, Twitter Bootstrap, Python, and Django. OpenSR is available for free download.

  4. Muscular workload of veterinary students during simulated open and laparoscopic surgery: A pilot study.

    Science.gov (United States)

    Kilkenny, Jessica; Larson, Dennis J; MacCormick, Mathew; Brown, Stephen H M; Singh, Ameet

    2017-08-01

    To compare upper extremity muscle activity and workload between simulated open surgery, multiple port laparoscopic surgery (MLS), and single incision laparoscopic surgery (SLS) techniques in veterinary students. Pilot study. Veterinary students (n = 10) from years 1 to 4. Bipolar skin surface electrodes were fixed bilaterally to the forearm flexor, forearm extensor, biceps brachii, triceps brachii, and upper trapezius muscles. Electromyography data were recorded during one repetition of 2 simulated surgical exercises via open surgery, MLS, and SLS. Participants completed a validated workload survey after each simulated surgical technique. Muscle activity and perceived workload were compared between surgical techniques with 1-way ANOVAs and Fisher's LSD post hoc tests. Muscle activity during peg transfer was higher with MLS and SLS compared to simulated open surgery in the right and left forearm extensors (both P < .0001), right (P < .0001) and left biceps (P = .0005), right triceps (P = .0004), and right upper trapezius muscles (P = .0211). Similar results were found for the right and left forearm extensors (both P < .0001), right (P = .0381) and left (P = .0147) forearm flexors, right biceps (P < .0001), and right triceps (P = .0004) during a simulated suture task. Participants found laparoscopic techniques more mentally demanding, physically demanding, complex, and stressful compared to a simulated open surgical technique. In veterinary students, average muscle activity and perceived workload were highest using MLS and SLS compared to an open surgical technique when performing simulated surgical exercises in a laparoscopic box trainer. © 2017 The American College of Veterinary Surgeons.

  5. Minimally invasive lumbar interbody fusion via MAST Quadrant retractor versus open surgery: a prospective randomized clinical trial

    Institute of Scientific and Technical Information of China (English)

    WANG Hong-li; L(U) Fei-zhou; JIANG Jian-yuan; MA Xin; XIA Xin-lei; WANG Li-xun

    2011-01-01

    Background In recent years,a variety of minimally invasive lumbar surgery techniques have achieved desirable efficacy,but some dispute remains regarding the advantages over open surgery.This study aimed to compare minimally invasive lumbar interbody fusion via MAST Quadrant retractor with open surgery in terms of perioperative factors,postoperative back muscle function,and 24-month postoperative follow-up results.Methods From September 2006 to June 2008,patients with single-level degenerative lumbar spine disease who were not responsive to conservative treatment were enrolled in this study.Patients were randomized to undergo either minimally invasive surgery (MIS,transforaminal lumbar interbody fusion via MAST Quadrant retractor,41 cases) or open surgery (improved transforaminal lumbar interbody fusion,38 cases).Results The MIS group had longer intraoperative fluoroscopy time than the open surgery group,and the open surgery group had significantly increased postoperative drainage volume and significantly prolonged postoperative recovery time compared with the MIS group (P <0.05 for all).MRI scanning showed that the T2 relaxation time in the multifidus muscle was significantly shorter in the MIS group than in the open surgery group at 3 months after surgery (P <0.01).Surface electromyography of the sacrospinalis muscle showed that the average discharge amplitude and frequency were significantly higher in the MIS group than in the open surgery group (P <0.01).The Oswestry disability index and visual analog scale scores were better at 3,6,12 and 24 months postoperatively than preoperatively in both groups.Both groups of patients met the imaging convergence criteria at the last follow-up.Conclusions MIS can effectively reduce sacrospinalis muscle injury compared with open surgery,which is conducive to early functional recovery.In the short term,MIS is superior to open surgery,but in the long term there is no significant difference between the two procedures.

  6. Open source high performance floating-point modules.

    Energy Technology Data Exchange (ETDEWEB)

    Underwood, Keith Douglas

    2006-02-01

    Given the logic density of modern FPGAs, it is feasible to use FPGAs for floating-point applications. However, it is important that any floating-point units that are used be highly optimized. This paper introduces an open source library of highly optimized floating-point units for Xilinx FPGAs. The units are fully IEEE compliant and achieve approximately 230 MHz operation frequency for double-precision add and multiply in a Xilinx Virtex-2-Pro FPGA (-7 speed grade). This speed is achieved with a 10 stage adder pipeline and a 12 stage multiplier pipeline. The area requirement is 571 slices for the adder and 905 slices for the multiplier.

  7. OPEN SOURCE ARCHITECTURE PER LA CITTÀ METROPOLITANA DI REGGIO CALABRIA

    Directory of Open Access Journals (Sweden)

    Gabriele Di Quarto

    2014-12-01

    Full Text Available The paper presents the role of the new Open Source technologies to encourage participation in the processes of incorporation of metropolitan cities established by the Italian legal system by Law 56 of 7 April 2014. Highlighted how technological innovation can provide useful tools to fill the competitive gap resulting from the physical conformation of the territory and from the delays in infrastructure of the future metropolitan city of Reggio Calabria. And is finally presented the experimental project of neighborhood of Archi CEP in Reggio Calabria.

  8. Clawpack: building an open source ecosystem for solving hyperbolic PDEs

    Directory of Open Access Journals (Sweden)

    Kyle T. Mandli

    2016-08-01

    Full Text Available Clawpack is a software package designed to solve nonlinear hyperbolic partial differential equations using high-resolution finite volume methods based on Riemann solvers and limiters. The package includes a number of variants aimed at different applications and user communities. Clawpack has been actively developed as an open source project for over 20 years. The latest major release, Clawpack 5, introduces a number of new features and changes to the code base and a new development model based on GitHub and Git submodules. This article provides a summary of the most significant changes, the rationale behind some of these changes, and a description of our current development model.

  9. An open-source java platform for automated reaction mapping.

    Science.gov (United States)

    Crabtree, John D; Mehta, Dinesh P; Kouri, Tina M

    2010-09-27

    This article presents software applications that have been built upon a modular, open-source, reaction mapping library that can be used in both cheminformatics and bioinformatics research. We first describe the theoretical underpinnings and modular architecture of the core software library. We then describe two applications that have been built upon that core. The first is a generic reaction viewer and mapper, and the second classifies reactions according to rules that can be modified by end users with little or no programming skills.

  10. A Stigmergy Approach for Open Source Software Developer Community Simulation

    Energy Technology Data Exchange (ETDEWEB)

    Cui, Xiaohui [ORNL; Beaver, Justin M [ORNL; Potok, Thomas E [ORNL; Pullum, Laura L [ORNL; Treadwell, Jim N [ORNL

    2009-01-01

    The stigmergy collaboration approach provides a hypothesized explanation about how online groups work together. In this research, we presented a stigmergy approach for building an agent based open source software (OSS) developer community collaboration simulation. We used group of actors who collaborate on OSS projects as our frame of reference and investigated how the choices actors make in contribution their work on the projects determinate the global status of the whole OSS projects. In our simulation, the forum posts and project codes served as the digital pheromone and the modified Pierre-Paul Grasse pheromone model is used for computing developer agent behaviors selection probability.

  11. Open source based cadastral information system : ANCFCC-MOROCCO

    CERN Document Server

    Elasri, Hicham; Jamila, Aatab; Karima, Ganoun

    2012-01-01

    This present project is developing a geographic information system to support the cadastral business. This system based on open source solutions which developed within the National Agency of Land Registry, Cadastre and Cartography (ANCFCC) enabling monitoring and analysis of cadastral procedures as well as offering consumable services by other information systems: consultation and querying spatial data. The project will also assist the various user profiles in the completion of production tasks and the possibility to eliminate the deficiencies identified to ensure an optimum level of productivity

  12. Collecting, Analyzing and Visualizing Tweets using Open Source Tools

    OpenAIRE

    Yang, Seungwon; Kavanaugh, Andrea L.

    2011-01-01

    This tutorial will teach participants how to collect, analyze and visualize results from twitter data. We will demonstrate several different free, open-source web-based tools that participants can use to collect twitter data (e.g., Archivist, 140kit.com, TwapperKeeper), and show them a few different methods, tools or programs they can use to analyze the data in a given collection. Finally, we will show participants visualization tools and programs they can use to present the analyses, such ...

  13. pyLIMA : an open source microlensing software

    Science.gov (United States)

    Bachelet, Etienne

    2017-01-01

    Planetary microlensing is a unique tool to detect cold planets around low-mass stars which is approaching a watershed in discoveries as near-future missions incorporate dedicated surveys. NASA and ESA have decided to complement WFIRST-AFTA and Euclid with microlensing programs to enrich our statistics about this planetary population. Of the nany challenges in- herent in these missions, the data analysis is of primary importance, yet is often perceived as time consuming, complex and daunting barrier to participation in the field. We present the first open source modeling software to conduct a microlensing analysis. This software is written in Python and use as much as possible existing packages.

  14. GitHub open source project recommendation system

    OpenAIRE

    Matek, Tadej; Zebec, Svit Timej

    2016-01-01

    Hosting platforms for software projects can form collaborative social networks and a prime example of this is GitHub which is arguably the most popular platform of this kind. An open source project recommendation system could be a major feature for a platform like GitHub, enabling its users to find relevant projects in a fast and simple manner. We perform network analysis on a constructed graph based on GitHub data and present a recommendation system that uses link prediction.

  15. Review on open source operating systems for internet of things

    Science.gov (United States)

    Wang, Zhengmin; Li, Wei; Dong, Huiliang

    2017-08-01

    Internet of Things (IoT) is an environment in which everywhere and every device became smart in a smart world. Internet of Things is growing vastly; it is an integrated system of uniquely identifiable communicating devices which exchange information in a connected network to provide extensive services. IoT devices have very limited memory, computational power, and power supply. Traditional operating systems (OS) have no way to meet the needs of IoT systems. In this paper, we thus analyze the challenges of IoT OS and survey applicable open source OSs.

  16. Clawpack: building an open source ecosystem for solving hyperbolic PDEs

    KAUST Repository

    Mandli, Kyle T.

    2016-08-08

    Clawpack is a software package designed to solve nonlinear hyperbolic partial differential equations using high-resolution finite volume methods based on Riemann solvers and limiters. The package includes a number of variants aimed at different applications and user communities. Clawpack has been actively developed as an open source project for over 20 years. The latest major release, Clawpack 5, introduces a number of new features and changes to the code base and a new development model based on GitHub and Git submodules. This article provides a summary of the most significant changes, the rationale behind some of these changes, and a description of our current development model.

  17. Agile Software Management for Successful Open Source Software Projects

    Science.gov (United States)

    Bermudez, L. E.

    2016-12-01

    The Open Geospatial Consortium (OGC), is the world leader industry consortium advancing geospatial technologies to help solve global challenges. The OGC brings the geospatial community together to advance standards, best practices and tools to improve sharing of geospatial data. The OGC Compliance program provides a free online testing facility [1], a process for certification [2] of compliant products, and coordination of a vibrant community of developers. The OGC testing facility is based on TEAM Engine, an open source software that is used by OGC and other geospatial communities to test web services, schemas, data and clients. The tests, which are also open source, are encoded in an XSLT like language called Compliance Testing language (CTL) and TestNG, a Java testing framework. TEAM Engine and related projects, as well as, each test have their own GitHub repository. The OGC Compliance program currently has more than 50 repositories. Releases of new revisions of tests and TEAM Engine are done every month, following a time boxed model. GitHub issue trackers are also use due to the easiness and close integration to the source code. However, GitHub issue trackers lack of the ability to order issues following an Agile methodology. Modern project management systems use a Kanban [3] approach to manage issues in a more efficient and focused way. About 10 organizations support the compliance program. A developer of an organization can take the lead of one or more projects and can participate on issues in other projects. However, coordinating the work to be done by one developer can be challenging due to the developer's participation in different projects and the difficulty of using a Kanban [3] approach directly from GitHub. This talk will provide a practical insight to manage projects using the Agile and Kanban methodologies when multiple developers participate in multiple GitHub projects. The ideas discussed in this talk will help organizations create more efficiently

  18. Open-source, Rapid Reporting of Dementia Evaluations

    Science.gov (United States)

    Graves, Rasinio S.; Mahnken, Jonathan D.; Swerdlow, Russell H.; Burns, Jeffrey M.; Price, Cathy; Amstein, Brad; Hunt, Suzanne L; Brown, Lexi; Adagarla, Bhargav; Vidoni, Eric D.

    2016-01-01

    The National Institutes of Health Alzheimer's Disease Center consortium requires member institutions to build and maintain a longitudinally characterized cohort with a uniform standard data set. Increasingly, centers are employing electronic data capture to acquire data at annual evaluations. In this paper, the University of Kansas Alzheimer's Disease Center reports on an open-source system of electronic data collection and reporting to improve efficiency. This Center capitalizes on the speed, flexibility and accessibility of the system to enhance the evaluation process while rapidly transferring data to the National Alzheimer's Coordinating Center. This framework holds promise for other consortia that regularly use and manage large, standardized datasets. PMID:26779306

  19. Developing Free and Open Source Interactive Teaching Tools

    Science.gov (United States)

    Nelson, E.

    2016-12-01

    Online learning has become an embedded component of education, but existing resources are often provided as institution-hosted content management systems (that may or may not be closed source). Creating interactive online applets to enhance student education is an alternative to these limited-customization systems that can be accomplished on a small budget. This presentation will break down the anatomy of author-developed online teaching tools created with open source packages to provide a survey of the development tools utilized—from the underlying website framework to interfacing with the scientific data. The availability of hosting and maintaining interactive teaching tools, whether static or dynamic, on no- or low-cost platforms will also be discussed. By constructing an interactive teaching tool from the ground up, scientists and educators are afforded complete flexibility and creativity in the design.

  20. Inexpensive Open-Source Data Logging in the Field

    Science.gov (United States)

    Wickert, A. D.

    2013-12-01

    I present a general-purpose open-source field-capable data logger, which provides a mechanism to develop dense networks of inexpensive environmental sensors. This data logger was developed as a low-power variant of the Arduino open-source development system, and is named the ALog ("Arduino Logger") BottleLogger (it is slim enough to fit inside a Nalgene water bottle) version 1.0. It features an integrated high-precision real-time clock, SD card slot for high-volume data storage, and integrated power switching. The ALog can interface with sensors via six analog/digital pins, two digital pins, and one digital interrupt pin that can read event-based inputs, such as those from a tipping-bucket rain gauge. We have successfully tested the ALog BottleLogger with ultrasonic rangefinders (for water stage and snow accumulation and melt), temperature sensors, tipping-bucket rain gauges, soil moisture and water potential sensors, resistance-based tools to measure frost heave, and cameras that it triggers based on events. The source code for the ALog, including functions to interface with a a range of commercially-available sensors, is provided as an Arduino C++ library with example implementations. All schematics, circuit board layouts, and source code files are open-source and freely available under GNU GPL v3.0 and Creative Commons Attribution-ShareAlike 3.0 Unported licenses. Through this work, we hope to foster a community-driven movement to collect field environmental data on a budget that permits citizen-scientists and researchers from low-income countries to collect the same high-quality data as researchers in wealthy countries. These data can provide information about global change to managers, governments, scientists, and interested citizens worldwide. Watertight box with ALog BottleLogger data logger on the left and battery pack with 3 D cells on the right. Data can be collected for 3-5 years on one set of batteries.

  1. [Application of new chest holder in the median sternotomy for open heart surgery in adults].

    Science.gov (United States)

    Xu, C Y; Feng, D G; Wang, J X; Cheng, Z Y; Wang, F; Lin, B; Xie, Z L; Suo, L N; Du, P

    2016-09-13

    Objective: To explore the application of new chest holder in the median sternotomy for open heart surgery in adults. Methods: Two hundred adult patients in Henan Provincial People's Hospital from May 2013 to May 2015 were enrolled in the study and randomly divided into two groups. Experimental group included 100 cases who accepted the new type of chest holder in the open heart surgery. Control group were also composed of 100 cases whose sternums were fixed with the pure steel wire cerclage. Sternal closure time was recorded since the sternum closing. All subjects were followed up to obtain the chest incision healing, the incidence of sternal dehiscence, infection and secondary thoracotomy, and thus to estimated the effect of new chest holder. Results: All patients in the experimental group reached the effect of firm closed chest surgery. Sternal closure time of experimental group was much shorter than that of control group[(10±2) vs (21±4) min, Pholder in the median sternotomy for open heart surgery is more convenient with small surgical trauma. It can also effectively reduce the incidence of sternal instability, dehiscence, infection and secondary thoracotomy.

  2. Effect of music on postoperative pain and physiologic parameters of patients after open heart surgery.

    Science.gov (United States)

    Özer, Nadiye; Karaman Özlü, Zeynep; Arslan, Sevban; Günes, Nezihat

    2013-03-01

    The aim of this study was to investigate the effect of listening to personal choice of music on self-report of pain intensity and the physiologic parameters in patients who have undergone open heart surgery. The study design was quasiexperimental. Patients were selected through convenience sampling in the Cardiovascular Surgery Intensive Care Unit at a university hospital. The study was conducted with a total of 87 patients who underwent open heart surgery: 44 in the music group, 43 in the control group, ages between 18 and 78 years. Through pretest-posttest design, postoperative first-day data were collected. First, physiologic parameters (blood pressure, heart rate, oxygen saturation, and respiratory rate) were recorded and a unidimensional verbal pain intensity scale applied to all participants. Later, the control group had a rest in their beds while the music group listened to their choice of music for 30 minutes. Physiologic data were then collected and the pain intensity scale applied once more. In the music group, there was a statistically significant increase in oxygen saturation (p = .001) and a lower pain score (p = .001) than in the control group. There was no difference between the groups in the other physiologic parameters. Results of this research provide evidence to support the use of music. Music might be a simple, safe, and effective method of reducing potentially harmful physiologic responses arising from pain in patients after open heart surgery. Copyright © 2013 American Society for Pain Management Nursing. Published by Elsevier Inc. All rights reserved.

  3. Open Source, Crowd Source: Harnessing the Power of the People behind Our Libraries

    Science.gov (United States)

    Trainor, Cindi

    2009-01-01

    Purpose: The purpose of this paper is to provide an insight into the use of Web 2.0 and Library 2.0 technologies so that librarians can combine open source software with user-generated content to create a richer discovery experience for their users. Design/methodology/approach: Following a description of the current state of integrated library…

  4. Changes in adhesion molecule expression and oxidative burst activity of granulocytes and monocytes during open-heart surgery with cardiopulmonary bypass compared with abdominal surgery

    DEFF Research Database (Denmark)

    Toft, P; Nielsen, C H; Tønnesen, E

    1998-01-01

    Cardiac and major abdominal surgery are associated with granulocytosis in peripheral blood. The purpose of the present study was to describe the granulocyte and monocyte oxidative burst and the expression of adhesion molecules following cardiac surgery with cardiopulmonary bypass and abdominal...... surgery. The ability to respond with an oxidative burst was measured by means of flow cytometry using 123-dihydrorhodamine. The adhesion molecules CD11a/CD18, CD11c/CD18, CD44 were measured using monoclonal antibodies. Blood samples from eight patients undergoing open-heart surgery were taken before...... surgery, 1, 5, 10 and 20 min after aortic clamping, and then 1, 5, 10 and 20 min and 1, 2 and 3 h after declamping. Samples from eight patients undergoing abdominal surgery were taken before surgery, at the end of surgery, and 2 and 3 h post-operatively. A decrease in number of granulocytes and monocytes...

  5. Assessing the Open Source Development Processes Using OMM

    Directory of Open Access Journals (Sweden)

    Etiel Petrinja

    2012-01-01

    Full Text Available The assessment of development practices in Free Libre Open Source Software (FLOSS projects can contribute to the improvement of the development process by identifying poor practices and providing a list of necessary practices. Available assessment methods (e.g., Capability Maturity Model Integration (CMMI do not address sufficiently FLOSS-specific aspects (e.g., geographically distributed development, importance of the contributions, reputation of the project, etc.. We present a FLOSS-focused, CMMI-like assessment/improvement model: the QualiPSo Open Source Maturity Model (OMM. OMM focuses on the development process. This makes it different from existing assessment models that are focused on the assessment of the product. We have assessed six FLOSS projects using OMM. Three projects were started and led by a software company, and three are developed by three different FLOSS communities. We identified poorly addressed development activities as the number of commit/bug reports, the external contributions, and the risk management. The results showed that FLOSS projects led by companies adopt standard project management approaches as product planning, design definition, and testing, that are less often addressed by community led FLOSS projects. The OMM is valuable for both the FLOSS community, by identifying critical development activities necessary to be improved, and for potential users that can better decide which product to adopt.

  6. Clarity: An Open Source Manager for Laboratory Automation

    Science.gov (United States)

    Delaney, Nigel F.; Echenique, José Rojas; Marx, Christopher J.

    2013-01-01

    Software to manage automated laboratories interfaces with hardware instruments, gives users a way to specify experimental protocols, and schedules activities to avoid hardware conflicts. In addition to these basics, modern laboratories need software that can run multiple different protocols in parallel and that can be easily extended to interface with a constantly growing diversity of techniques and instruments. We present Clarity: a laboratory automation manager that is hardware agnostic, portable, extensible and open source. Clarity provides critical features including remote monitoring, robust error reporting by phone or email, and full state recovery in the event of a system crash. We discuss the basic organization of Clarity; demonstrate an example of its implementation for the automated analysis of bacterial growth; and describe how the program can be extended to manage new hardware. Clarity is mature; well documented; actively developed; written in C# for the Common Language Infrastructure; and is free and open source software. These advantages set Clarity apart from currently available laboratory automation programs. PMID:23032169

  7. Fast, accurate, robust and Open Source Brain Extraction Tool (OSBET)

    Science.gov (United States)

    Namias, R.; Donnelly Kehoe, P.; D'Amato, J. P.; Nagel, J.

    2015-12-01

    The removal of non-brain regions in neuroimaging is a critical task to perform a favorable preprocessing. The skull-stripping depends on different factors including the noise level in the image, the anatomy of the subject being scanned and the acquisition sequence. For these and other reasons, an ideal brain extraction method should be fast, accurate, user friendly, open-source and knowledge based (to allow for the interaction with the algorithm in case the expected outcome is not being obtained), producing stable results and making it possible to automate the process for large datasets. There are already a large number of validated tools to perform this task but none of them meets the desired characteristics. In this paper we introduced an open source brain extraction tool (OSBET), composed of four steps using simple well-known operations such as: optimal thresholding, binary morphology, labeling and geometrical analysis that aims to assemble all the desired features. We present an experiment comparing OSBET with other six state-of-the-art techniques against a publicly available dataset consisting of 40 T1-weighted 3D scans and their corresponding manually segmented images. OSBET gave both: a short duration with an excellent accuracy, getting the best Dice Coefficient metric. Further validation should be performed, for instance, in unhealthy population, to generalize its usage for clinical purposes.

  8. Open source projects in software engineering education: a mapping study

    Science.gov (United States)

    Nascimento, Debora M. C.; Almeida Bittencourt, Roberto; Chavez, Christina

    2015-01-01

    Context: It is common practice in academia to have students work with "toy" projects in software engineering (SE) courses. One way to make such courses more realistic and reduce the gap between academic courses and industry needs is getting students involved in open source projects (OSP) with faculty supervision. Objective: This study aims to summarize the literature on how OSP have been used to facilitate students' learning of SE. Method: A systematic mapping study was undertaken by identifying, filtering and classifying primary studies using a predefined strategy. Results: 72 papers were selected and classified. The main results were: (a) most studies focused on comprehensive SE courses, although some dealt with specific areas; (b) the most prevalent approach was the traditional project method; (c) studies' general goals were: learning SE concepts and principles by using OSP, learning open source software or both; (d) most studies tried out ideas in regular courses within the curriculum; (e) in general, students had to work with predefined projects; (f) there was a balance between approaches where instructors had either inside control or no control on the activities performed by students; (g) when learning was assessed, software artefacts, reports and presentations were the main instruments used by teachers, while surveys were widely used for students' self-assessment; (h) most studies were published in the last seven years. Conclusions: The resulting map gives an overview of the existing initiatives in this context and shows gaps where further research can be pursued.

  9. Robust, open-source removal of systematics in Kepler data

    Science.gov (United States)

    Aigrain, S.; Parviainen, H.; Roberts, S.; Reece, S.; Evans, T.

    2017-10-01

    We present ARC2 (Astrophysically Robust Correction 2), an open-source python-based systematics-correction pipeline, to correct for the Kepler prime mission long-cadence light curves. The ARC2 pipeline identifies and corrects any isolated discontinuities in the light curves and then removes trends common to many light curves. These trends are modelled using the publicly available co-trending basis vectors, within an (approximate) Bayesian framework with 'shrinkage' priors to minimize the risk of overfitting and the injection of any additional noise into the corrected light curves, while keeping any astrophysical signals intact. We show that the ARC2 pipeline's performance matches that of the standard Kepler PDC-MAP data products using standard noise metrics, and demonstrate its ability to preserve astrophysical signals using injection tests with simulated stellar rotation and planetary transit signals. Although it is not identical, the ARC2 pipeline can thus be used as an open-source alternative to PDC-MAP, whenever the ability to model the impact of the systematics removal process on other kinds of signal is important.

  10. SimVascular: An Open Source Pipeline for Cardiovascular Simulation.

    Science.gov (United States)

    Updegrove, Adam; Wilson, Nathan M; Merkow, Jameson; Lan, Hongzhi; Marsden, Alison L; Shadden, Shawn C

    2017-03-01

    Patient-specific cardiovascular simulation has become a paradigm in cardiovascular research and is emerging as a powerful tool in basic, translational and clinical research. In this paper we discuss the recent development of a fully open-source SimVascular software package, which provides a complete pipeline from medical image data segmentation to patient-specific blood flow simulation and analysis. This package serves as a research tool for cardiovascular modeling and simulation, and has contributed to numerous advances in personalized medicine, surgical planning and medical device design. The SimVascular software has recently been refactored and expanded to enhance functionality, usability, efficiency and accuracy of image-based patient-specific modeling tools. Moreover, SimVascular previously required several licensed components that hindered new user adoption and code management and our recent developments have replaced these commercial components to create a fully open source pipeline. These developments foster advances in cardiovascular modeling research, increased collaboration, standardization of methods, and a growing developer community.

  11. Eucalyptus: an open-source cloud computing infrastructure

    Energy Technology Data Exchange (ETDEWEB)

    Nurmi, Daniel; Wolski, Rich; Grzegorczyk, Chris; Obertelli, Graziano; Soman, Sunil; Youseff, Lamia; Zagorodnov, Dmitrii, E-mail: rich@cs.ucsb.ed [Computer Science Department, University of California, Santa Barbara, CA 93106 (United States) and Eucalyptus Systems Inc., 130 Castilian Dr., Goleta, CA 93117 (United States)

    2009-07-01

    Utility computing, elastic computing, and cloud computing are all terms that refer to the concept of dynamically provisioning processing time and storage space from a ubiquitous 'cloud' of computational resources. Such systems allow users to acquire and release the resources on demand and provide ready access to data from processing elements, while relegating the physical location and exact parameters of the resources. Over the past few years, such systems have become increasingly popular, but nearly all current cloud computing offerings are either proprietary or depend upon software infrastructure that is invisible to the research community. In this work, we present Eucalyptus, an open-source software implementation of cloud computing that utilizes compute resources that are typically available to researchers, such as clusters and workstation farms. In order to foster community research exploration of cloud computing systems, the design of Eucalyptus emphasizes modularity, allowing researchers to experiment with their own security, scalability, scheduling, and interface implementations. In this paper, we outline the design of Eucalyptus, describe our own implementations of the modular system components, and provide results from experiments that measure performance and scalability of a Eucalyptus installation currently deployed for public use. The main contribution of our work is the presentation of the first research-oriented open-source cloud computing system focused on enabling methodical investigations into the programming, administration, and deployment of systems exploring this novel distributed computing model.

  12. Digital Forensics Capabilities in an Open Source Framework

    Directory of Open Access Journals (Sweden)

    Cosmin Bubulean

    2015-06-01

    Full Text Available This article focus to establish a new perspective about digital forensics and how this technology could be used by more and more people. Nowadays, this term is not so popular between regular computer users. They don’t know what digital forensics is and how could they take advantage of this new technology. The tools available on the market are designated and used especially for legal authorities all over the world. Most of them are a company solution of the problem, premium software, and the development facilities are private, but they offer support and trainings that come with a price.  But for a regular user this isn’t very handy, because this software comes with high prices, or couldn’t be used at all, due to the fact that for a few products only the law enforcements units have this right. However, open-source solutions have now a rapid development, and the developer community behind them is a big plus. DDF – Digital Forensics Framework is an open-source framework, having great capabilities that empower a regular user with great investigations features.

  13. Code forking in open-source software: a requirements perspective

    CERN Document Server

    Ernst, Neil A; Mylopoulos, John

    2010-01-01

    To fork a project is to copy the existing code base and move in a direction different than that of the erstwhile project leadership. Forking provides a rapid way to address new requirements by adapting an existing solution. However, it can also create a plethora of similar tools, and fragment the developer community. Hence, it is not always clear whether forking is the right strategy. In this paper, we describe a mixed-methods exploratory case study that investigated the process of forking a project. The study concerned the forking of an open-source tool for managing software projects, Trac. Trac was forked to address differing requirements in an academic setting. The paper makes two contributions to our understanding of code forking. First, our exploratory study generated several theories about code forking in open source projects, for further research. Second, we investigated one of these theories in depth, via a quantitative study. We conjectured that the features of the OSS forking process would allow new...

  14. Building integrated business environments: analysing open-source ESB

    Science.gov (United States)

    Martínez-Carreras, M. A.; García Jimenez, F. J.; Gómez Skarmeta, A. F.

    2015-05-01

    Integration and interoperability are two concepts that have gained significant prominence in the business field, providing tools which enable enterprise application integration (EAI). In this sense, enterprise service bus (ESB) has played a crucial role as the underpinning technology for creating integrated environments in which companies may connect all their legacy-applications. However, the potential of these technologies remains unknown and some important features are not used to develop suitable business environments. The aim of this paper is to describe and detail the elements for building the next generation of integrated business environments (IBE) and to analyse the features of ESBs as the core of this infrastructure. For this purpose, we evaluate how well-known open-source ESB products fulfil these needs. Moreover, we introduce a scenario in which the collaborative system 'Alfresco' is integrated in the business infrastructure. Finally, we provide a comparison of the different open-source ESBs available for IBE requirements. According to this study, Fuse ESB provides the best results, considering features such as support for a wide variety of standards and specifications, documentation and implementation, security, advanced business trends, ease of integration and performance.

  15. Open Sourcing Social Change: Inside the Constellation Model

    Directory of Open Access Journals (Sweden)

    Tonya Surman

    2008-09-01

    Full Text Available The constellation model was developed by and for the Canadian Partnership for Children's Health and the Environment. The model offers an innovative approach to organizing collaborative efforts in the social mission sector and shares various elements of the open source model. It emphasizes self-organizing and concrete action within a network of partner organizations working on a common issue. Constellations are self-organizing action teams that operate within the broader strategic vision of a partnership. These constellations are outwardly focused, placing their attention on creating value for those in the external environment rather than on the partnership itself. While serious effort is invested into core partnership governance and management, most of the energy is devoted to the decision making, resources and collaborative effort required to create social value. The constellations drive and define the partnership. The constellation model emerged from a deep understanding of the power of networks and peer production. Leadership rotates fluidly amongst partners, with each partner having the freedom to head up a constellation and to participate in constellations that carry out activities that are of more peripheral interest. The Internet provided the platform, the partner network enabled the expertise to align itself, and the goal of reducing chemical exposure in children kept the energy flowing. Building on seven years of experience, this article provides an overview of the constellation model, discusses the results from the CPCHE, and identifies similarities and differences between the constellation and open source models.

  16. The assessment of neural injury following open heart surgery by physiological tremor analysis.

    Science.gov (United States)

    Németh, Adám; Hejjel, László; Ajtay, Zénó; Kellényi, Lóránd; Solymos, Andor; Bártfai, Imre; Kovács, Norbert; Lenkey, Zsófia; Cziráki, Attila; Szabados, Sándor

    2013-02-21

    The appearance of post-operative cognitive dysfunction as a result of open heart surgery has been proven by several studies. Focal and/or sporadic neuron damage emerging in the central nervous system may not only appear as cognitive dysfunction, but might strongly influence features of physiological tremor. We investigated 110 patients (age: 34-73 years; 76 male, 34 female; 51 coronary artery bypass grafting (CABG), 25 valve replacement, 25 combined open heart surgery, 9 off-pump CABG) before surgery and after open-heart surgery on the 3(rd) to 5(th) post-operative day. The assessment of the physiological tremor analysis was performed with our newly developed equipment based on the Analog Devices ADXL 320 JPC integrated accelerometer chip. Recordings were stored on a PC and spectral analysis was performed by fast Fourier transformation (FFT). We compared power integrals in the 1-4 Hz, 4-8 Hz and 8-12 Hz frequency ranges and these were statistically assessed by the Wilcoxon rank correlation test. We found significant changes in the power spectrum of physiological tremor. The spectrum in the 8-12 Hz range (neuronal oscillation) decreased and a shift was recognised to the lower spectrum (p < 0.01). The magnitude of the shift was not significantly higher for females than for males (p < 0.157). We found no significant difference between the shift and the cross-clamp or perfusion time (p < 0.6450). The assessment of physiological tremor by means of our novel, feasible method may provide a deeper insight into the mechanism of central nervous system damage associated with open heart surgery.

  17. Comparison of Semi-Invasive "Internal Splinting" and Open Suturing Techniques in Achilles Tendon Rupture Surgery.

    Science.gov (United States)

    Sarman, Hakan; Muezzinoglu, Umit Sefa; Memisoglu, Kaya; Aydin, Adem; Atmaca, Halil; Baran, Tuncay; Odabas Ozgur, Bahar; Ozgur, Turgay; Kantar, Cengizhan

    2016-01-01

    The goal of the present study was to evaluate the semi-invasive "internal splinting" (SIIS) method for repair of Achilles tendon rupture relative to open repair with Krakow sutures. Efficacy was evaluated based on the clinical and functional outcomes, postoperative magnetic resonance imaging measurements, isokinetic results, and surgical complication rates. Functional measurements included the Thermann and American Orthopaedic Foot and Ankle Society (AOFAS) ankle scores, bilateral ankle dorsiflexion, and plantar flexion measurements. Magnetic resonance imaging was used to compare the bilateral length and thickness of each Achilles tendon. The isokinetic outcomes were evaluated using a Biodex System 3 dynamometer. Of the 45 patients meeting the inclusion criteria, 24 were treated by SIIS and 21 by the open Krackow suture technique. The mean follow-up time for all patients was 43.7 (range 6 to 116) months. In the SIIS group, patients returned to normal daily activities after 7.2 (range 6 to 8) weeks compared with 14.3 (range 12 to 15) weeks in the open surgery group. The AOFAS ankle scores were 93.5 (range 82 to 100) points in the open repair group and 96.2 (range 86 to 100) points in the SIIS group. The Thermann scores were 80.4 (range 53 to 91) points for the open repair group and 87.9 (range 81 to 100) points for the SIIS method. The mean Achilles length on the operated side measured using magnetic resonance imaging was 175.06 (range 110 to 224) mm and 177.76 (range 149 to 214) mm for the open surgery and SIIS groups, respectively. Sensory impairment in the territory of the sural nerve was identified in 1 patient immediately after SIIS surgery, although this defect had completely resolved within 12 months. SIIS yielded better outcomes relative to the open surgery group according to the isokinetic measurements. Taken together, these data indicate the SIIS method for Achilles tendon ruptures performed better in terms of both functional and objective outcomes

  18. Comparative Analysis Study of Open Source GIS in Malaysia

    Science.gov (United States)

    Rasid, Muhammad Zamir Abdul; Kamis, Naddia; Khuizham Abd Halim, Mohd

    2014-06-01

    Open source origin might appear like a major prospective change which is qualified to deliver in various industries and also competing means in developing countries. The leading purpose of this research study is to basically discover the degree of adopting Open Source Software (OSS) that is connected with Geographic Information System (GIS) application within Malaysia. It was derived based on inadequate awareness with regards to the origin ideas or even on account of techie deficiencies in the open origin instruments. This particular research has been carried out based on two significant stages; the first stage involved a survey questionnaire: to evaluate the awareness and acceptance level based on the comparison feedback regarding OSS and commercial GIS. This particular survey was conducted among three groups of candidates: government servant, university students and lecturers, as well as individual. The approaches of measuring awareness in this research were based on a comprehending signal plus a notion signal for each survey questions. These kinds of signs had been designed throughout the analysis in order to supply a measurable and also a descriptive signal to produce the final result. The second stage involved an interview session with a major organization that carries out available origin internet GIS; the Federal Department of Town and Country Planning Peninsular Malaysia (JPBD). The impact of this preliminary study was to understand the particular viewpoint of different groups of people on the available origin, and also their insufficient awareness with regards to origin ideas as well as likelihood may be significant root of adopting level connected with available origin options.

  19. [Methicillin-cephem-resistant Staphylococcus aureus (MRSA) mediastinitis following open heart surgery].

    Science.gov (United States)

    Yanagisawa, H; Anzai, T; Iijima, T; Sakata, Y; Ishikawa, S; Obayashi, T; Otaki, A; Saito, A; Suzuki, M; Kamoshita, Y

    1991-11-01

    Mediastinitis following cardiac surgery occurs frequently in association with high mortality and morbidity. Patient was a 6-year-old boy suffering from Sotos syndrome with secundum type of ASD. He was operated upon to repair ASD. Following the surgery, he suffered from MRSA mediastinitis and osteomyelitis of the sternum. Routine method of closed irrigation after reopening of the sternal wound was ineffective. Patient recovered following aggressive debridement repeatedly, open drainage and topical irrigation with vancomycin. This appears to be a useful method to treat MRSA mediastinitis of the sternum.

  20. Open Invention Network: A Defensive Patent Pool for Open Source Projects and Businesses

    Directory of Open Access Journals (Sweden)

    Deborah Nicholson

    2012-01-01

    Full Text Available This article explores how patents impact innovation within free/libre open source software (F/LOSS businesses and projects. The number of software patent suits brought each year is increasing and is diverting millions of dollars in funds from developers to lawyers. With patent suits on the rise, the US Supreme Court has left the F/LOSS community in a position where it must either wait years for legislation or address the issue of patent suits itself. However, defending the Linux kernel and related technologies is a different challenge than the one that faces proprietary software businesses. This article describes Open Invention Network, an initiative that is designed to meet the particular challenges facing the F/LOSS community and businesses by providing a defensive patent pool.

  1. Long-Term Oncologic Outcomes of Laparoscopic versus Open Surgery for Middle and Lower Rectal Cancer.

    Directory of Open Access Journals (Sweden)

    Shaotang Li

    Full Text Available Laparoscopic surgery for middle and lower rectal cancer remain controversial because anatomical and complex surgical procedures specifically influence oncologic outcomes. This study analyzes the long-term outcomes of laparoscopic versus open surgery for middle and lower rectal cancer.Patients (laparoscopic: n = 129, open: n = 152 who underwent curative resection for middle and lower rectal cancer from 2003 to 2008 participated in the study. The same surgical team performed all operations. The mean follow up time of all patients was 74.3 months.No statistical difference in local recurrence rate (7.8% vs. 7.2%; log-rank = 0.024; P = 0.876 and distant recurrence rate (20.9% vs.16.4%; log-rank = 0.699; P = 0.403 between laparoscopic and open groups were observed within 5 years. The 5-year overall survival rates of the laparoscopic and open groups were 72.9% and 75.7%, respectively; no significant statistical difference was observed between them (log-rank = 0.163; P = 0.686. The 5-year survival rates between groups were not different between stages: Stage I (92.6% vs. 86.7%; log-rank = 0.533; P = 0.465; stage II (75.8% vs. 80.5%; log-rank = 0.212; P = 0.645; and Stage III (63.8% vs. 69.1%, log-rank = 0272;P = 0.602. However, significant statistical difference amongst different stages were observed (log-rank = 1.802; P = 0.003.Laparoscopic and open surgery for middle and lower rectal cancer offer equivalent long-term oncologic outcomes. Laparoscopic surgery is feasible in these patients.

  2. Fpocket: An open source platform for ligand pocket detection

    Directory of Open Access Journals (Sweden)

    Le Guilloux Vincent

    2009-06-01

    Full Text Available Abstract Background Virtual screening methods start to be well established as effective approaches to identify hits, candidates and leads for drug discovery research. Among those, structure based virtual screening (SBVS approaches aim at docking collections of small compounds in the target structure to identify potent compounds. For SBVS, the identification of candidate pockets in protein structures is a key feature, and the recent years have seen increasing interest in developing methods for pocket and cavity detection on protein surfaces. Results Fpocket is an open source pocket detection package based on Voronoi tessellation and alpha spheres built on top of the publicly available package Qhull. The modular source code is organised around a central library of functions, a basis for three main programs: (i Fpocket, to perform pocket identification, (ii Tpocket, to organise pocket detection benchmarking on a set of known protein-ligand complexes, and (iii Dpocket, to collect pocket descriptor values on a set of proteins. Fpocket is written in the C programming language, which makes it a platform well suited for the scientific community willing to develop new scoring functions and extract various pocket descriptors on a large scale level. Fpocket 1.0, relying on a simple scoring function, is able to detect 94% and 92% of the pockets within the best three ranked pockets from the holo and apo proteins respectively, outperforming the standards of the field, while being faster. Conclusion Fpocket provides a rapid, open source and stable basis for further developments related to protein pocket detection, efficient pocket descriptor extraction, or drugablity prediction purposes. Fpocket is freely available under the GNU GPL license at http://fpocket.sourceforge.net.

  3. GRASS GIS: The first Open Source Temporal GIS

    Science.gov (United States)

    Gebbert, Sören; Leppelt, Thomas

    2015-04-01

    GRASS GIS is a full featured, general purpose Open Source geographic information system (GIS) with raster, 3D raster and vector processing support[1]. Recently, time was introduced as a new dimension that transformed GRASS GIS into the first Open Source temporal GIS with comprehensive spatio-temporal analysis, processing and visualization capabilities[2]. New spatio-temporal data types were introduced in GRASS GIS version 7, to manage raster, 3D raster and vector time series. These new data types are called space time datasets. They are designed to efficiently handle hundreds of thousands of time stamped raster, 3D raster and vector map layers of any size. Time stamps can be defined as time intervals or time instances in Gregorian calendar time or relative time. Space time datasets are simplifying the processing and analysis of large time series in GRASS GIS, since these new data types are used as input and output parameter in temporal modules. The handling of space time datasets is therefore equal to the handling of raster, 3D raster and vector map layers in GRASS GIS. A new dedicated Python library, the GRASS GIS Temporal Framework, was designed to implement the spatio-temporal data types and their management. The framework provides the functionality to efficiently handle hundreds of thousands of time stamped map layers and their spatio-temporal topological relations. The framework supports reasoning based on the temporal granularity of space time datasets as well as their temporal topology. It was designed in conjunction with the PyGRASS [3] library to support parallel processing of large datasets, that has a long tradition in GRASS GIS [4,5]. We will present a subset of more than 40 temporal modules that were implemented based on the GRASS GIS Temporal Framework, PyGRASS and the GRASS GIS Python scripting library. These modules provide a comprehensive temporal GIS tool set. The functionality range from space time dataset and time stamped map layer management

  4. Q&A. Does lack of product management impact the users of open source?

    Directory of Open Access Journals (Sweden)

    Paul Young

    2008-05-01

    Full Text Available Most commercial software companies employ product managers to handle the planning and marketing of software products, whereas few open source projects have a product manager. Does lack of product management impact the users of open source?

  5. Adoption of open source software in business models: a Red Hat and IBM case study

    CSIR Research Space (South Africa)

    Munga, N

    2009-10-01

    Full Text Available Free / Libre open source software (FLOSS/OSS) has gained increasing popularity and utilisation in commercial and governmental organisations. Universities like Harvard and Stanford now offer courses on open source as a business and also on how...

  6. An open source device for operant licking in rats.

    Science.gov (United States)

    Longley, Matthew; Willis, Ethan L; Tay, Cindy X; Chen, Hao

    2017-01-01

    We created an easy-to-use device for operant licking experiments and another device that records environmental variables. Both devices use the Raspberry Pi computer to obtain data from multiple input devices (e.g., radio frequency identification tag readers, touch and motion sensors, environmental sensors) and activate output devices (e.g., LED lights, syringe pumps) as needed. Data gathered from these devices are stored locally on the computer but can be automatically transferred to a remote server via a wireless network. We tested the operant device by training rats to obtain either sucrose or water under the control of a fixed ratio, a variable ratio, or a progressive ratio reinforcement schedule. The lick data demonstrated that the device has sufficient precision and time resolution to record the fast licking behavior of rats. Data from the environment monitoring device also showed reliable measurements. By providing the source code and 3D design under an open source license, we believe these examples will stimulate innovation in behavioral studies. The source code can be found at http://github.com/chen42/openbehavior.

  7. ACToR Chemical Structure processing using Open Source ...

    Science.gov (United States)

    ACToR (Aggregated Computational Toxicology Resource) is a centralized database repository developed by the National Center for Computational Toxicology (NCCT) at the U.S. Environmental Protection Agency (EPA). Free and open source tools were used to compile toxicity data from over 1,950 public sources. ACToR contains chemical structure information and toxicological data for over 558,000 unique chemicals. The database primarily includes data from NCCT research programs, in vivo toxicity data from ToxRef, human exposure data from ExpoCast, high-throughput screening data from ToxCast and high quality chemical structure information from the EPA DSSTox program. The DSSTox database is a chemical structure inventory for the NCCT programs and currently has about 16,000 unique structures. Included are also data from PubChem, ChemSpider, USDA, FDA, NIH and several other public data sources. ACToR has been a resource to various international and national research groups. Most of our recent efforts on ACToR are focused on improving the structural identifiers and Physico-Chemical properties of the chemicals in the database. Organizing this huge collection of data and improving the chemical structure quality of the database has posed some major challenges. Workflows have been developed to process structures, calculate chemical properties and identify relationships between CAS numbers. The Structure processing workflow integrates web services (PubChem and NIH NCI Cactus) to d

  8. An open source device for operant licking in rats

    Directory of Open Access Journals (Sweden)

    Matthew Longley

    2017-02-01

    Full Text Available We created an easy-to-use device for operant licking experiments and another device that records environmental variables. Both devices use the Raspberry Pi computer to obtain data from multiple input devices (e.g., radio frequency identification tag readers, touch and motion sensors, environmental sensors and activate output devices (e.g., LED lights, syringe pumps as needed. Data gathered from these devices are stored locally on the computer but can be automatically transferred to a remote server via a wireless network. We tested the operant device by training rats to obtain either sucrose or water under the control of a fixed ratio, a variable ratio, or a progressive ratio reinforcement schedule. The lick data demonstrated that the device has sufficient precision and time resolution to record the fast licking behavior of rats. Data from the environment monitoring device also showed reliable measurements. By providing the source code and 3D design under an open source license, we believe these examples will stimulate innovation in behavioral studies. The source code can be found at http://github.com/chen42/openbehavior.

  9. An open source device for operant licking in rats

    Science.gov (United States)

    Longley, Matthew; Willis, Ethan L.; Tay, Cindy X.

    2017-01-01

    We created an easy-to-use device for operant licking experiments and another device that records environmental variables. Both devices use the Raspberry Pi computer to obtain data from multiple input devices (e.g., radio frequency identification tag readers, touch and motion sensors, environmental sensors) and activate output devices (e.g., LED lights, syringe pumps) as needed. Data gathered from these devices are stored locally on the computer but can be automatically transferred to a remote server via a wireless network. We tested the operant device by training rats to obtain either sucrose or water under the control of a fixed ratio, a variable ratio, or a progressive ratio reinforcement schedule. The lick data demonstrated that the device has sufficient precision and time resolution to record the fast licking behavior of rats. Data from the environment monitoring device also showed reliable measurements. By providing the source code and 3D design under an open source license, we believe these examples will stimulate innovation in behavioral studies. The source code can be found at http://github.com/chen42/openbehavior. PMID:28229020

  10. An Extensible Open-Source Compiler Infrastructure for Testing

    Energy Technology Data Exchange (ETDEWEB)

    Quinlan, D; Ur, S; Vuduc, R

    2005-12-09

    Testing forms a critical part of the development process for large-scale software, and there is growing need for automated tools that can read, represent, analyze, and transform the application's source code to help carry out testing tasks. However, the support required to compile applications written in common general purpose languages is generally inaccessible to the testing research community. In this paper, we report on an extensible, open-source compiler infrastructure called ROSE, which is currently in development at Lawrence Livermore National Laboratory. ROSE specifically targets developers who wish to build source-based tools that implement customized analyses and optimizations for large-scale C, C++, and Fortran90 scientific computing applications (on the order of a million lines of code or more). However, much of this infrastructure can also be used to address problems in testing, and ROSE is by design broadly accessible to those without a formal compiler background. This paper details the interactions between testing of applications and the ways in which compiler technology can aid in the understanding of those applications. We emphasize the particular aspects of ROSE, such as support for the general analysis of whole programs, that are particularly well-suited to the testing research community and the scale of the problems that community solves.

  11. Open heart surgery in dialysis-dependent patients with end stage renal failure

    Directory of Open Access Journals (Sweden)

    Orkut Güçlü

    2013-09-01

    Full Text Available Objective: Patients with chronic renal insufficiency remaina risky subgroup in open heart surgery becauseof various reasons. The incidence of cardiovascular diseasein hemodialysis dependent renal failure is found tobe higher when compared with the normal population.Chronic dialysis is still a very important independent riskfactor for mortality and morbidity despite of many studies.In this study, we retrospectively evaluated the outcome ofpatients with chronic renal failure who had undergone toopen cardiac surgery.Methods: The medical charts of 36 patients on maintenancedialysis who underwent cardiovascular surgerywere retrospectively analyzed. Peroperative findings ofthese patients were analyzed from patients’ hospital records.Results: Twenty-seven men (75% and nine women(25% totally 36 patients were included to study. Themean age was 58.3±8.5 (range, 44-76 years. 12 patientsunderwent coronary artery bypass surgery, 10 hadconcomitant coronary artery bypass surgery and valvereplacements, five had valve replacements, three hadconcomitant coronary artery bypass surgery and left ventriculectomy,four had valve replacement with other valverepair, two had aortic surgery due to ascending aortic aneurysms.The mean cross clamp time was 78.1±31.3 minand the mean perfusion time was 158.8±92.2 min. Themean intensive care unit stay was 60±41 hours, and themean hospital stay was 12±5 days. Hospital mortality ratewas %38.8.Conclusions: Cardiac and renal functions are closely associatedwith each other. Cardiac surgery operations canbe applied to patients with end-stage renal failure underacceptable risks. Appropriate preoperative preparationwith good postoperative patient follow-up is necessary tohave acceptable levels of morbidity and mortality rates. JClin Exp Invest 2013; 4 (3: 335-338Key words: Cardiac surgery, chronic renal failure, mortality

  12. Improving Data Catalogs with Free and Open Source Software

    Science.gov (United States)

    Schweitzer, R.; Hankin, S.; O'Brien, K.

    2013-12-01

    The Global Earth Observation Integrated Data Environment (GEO-IDE) is NOAA's effort to successfully integrate data and information with partners in the national US-Global Earth Observation System (US-GEO) and the international Global Earth Observation System of Systems (GEOSS). As part of the GEO-IDE, the Unified Access Framework (UAF) is working to build momentum towards the goal of increased data integration and interoperability. The UAF project is moving towards this goal with an approach that includes leveraging well known and widely used standards, as well as free and open source software. The UAF project shares the widely held conviction that the use of data standards is a key ingredient necessary to achieve interoperability. Many community-based consensus standards fail, though, due to poor compliance. Compliance problems emerge for many reasons: because the standards evolve through versions, because documentation is ambiguous or because individual data providers find the standard inadequate as-is to meet their special needs. In addition, minimalist use of standards will lead to a compliant service, but one which is of low quality. In this presentation, we will be discussing the UAF effort to build a catalog cleaning tool which is designed to crawl THREDDS catalogs, analyze the data available, and then build a 'clean' catalog of data which is standards compliant and has a uniform set of data access services available. These data services include, among others, OPeNDAP, Web Coverage Service (WCS) and Web Mapping Service (WMS). We will also discuss how we are utilizing free and open source software and services to both crawl, analyze and build the clean data catalog, as well as our efforts to help data providers improve their data catalogs. We'll discuss the use of open source software such as DataNucleus, Thematic Realtime Environmental Distributed Data Services (THREDDS), ncISO and the netCDF Java Common Data Model (CDM). We'll also demonstrate how we are

  13. Arduino & Open Source Design%Arduino开源设计

    Institute of Scientific and Technical Information of China (English)

    吴义满

    2016-01-01

    Along with the development of the times, hardware development is indispensable to many projects, but not embedded professionals complete the hardware development independently. And some junior hardware engineers abandon Arduino because of its simple and non-professional, who ignore its real role. Firstly, Arduino birth story is described in order to parse what Arduino is. Then, through classic cases Arduino influence is analyzed in five areas, which it is true that Arduino has brought the revolutionary change. In the final,Arduino significance of open source is analyzed, by which it is discovered that the rise of Arduino is in the rise of open source culture. Open source culture will become the mainstream of the development of science and technology culture in the future. The idea has a certain reference value for people to make the technology plan of future technology development routes.%随着时代发展,硬件开发在不少项目开发中不可或缺,但非嵌入式专业人士难以独立完成硬件开发.而一些初入门的硬件工程师嫌弃Arduino开发简单和不够专业,忽视其真正作用.该文首先通过阐述Arduino诞生故事,解析了何为Arduino;接着通过经典案例分析Arduino在五大领域中起到的影响,发现Arduino带来了革命性的变化;最后分析Arduino开源的意义,因此也发现Arduino的兴起其实是开源文化在兴起,开源文化将成为未来科技发展的主流文化.该思想观点对技术人士规划未来技术发展路线具有一定的参考价值.

  14. Open source GIS for HIV/AIDS management

    Directory of Open Access Journals (Sweden)

    Ricketts Adam

    2008-10-01

    Full Text Available Abstract Background Reliable access to basic services can improve a community's resilience to HIV/AIDS. Accordingly, work is being done to upgrade the physical infrastructure in affected areas, often employing a strategy of decentralised service provision. Spatial characteristics are one of the major determinants in implementing services, even in the smaller municipal areas, and good quality spatial information is needed to inform decision making processes. However, limited funds, technical infrastructure and human resource capacity result in little or no access to spatial information for crucial infrastructure development decisions at local level. This research investigated whether it would be possible to develop a GIS for basic infrastructure planning and management at local level. Given the resource constraints of the local government context, particularly in small municipalities, it was decided that open source software should be used for the prototype system. Results The design and development of a prototype system illustrated that it is possible to develop an open source GIS system that can be used within the context of local information management. Usability tests show a high degree of usability for the system, which is important considering the heavy workload and high staff turnover that characterises local government in South Africa. Local infrastructure management stakeholders interviewed in a case study of a South African municipality see the potential for the use of GIS as a communication tool and are generally positive about the use of GIS for these purposes. They note security issues that may arise through the sharing of information, lack of skills and resource constraints as the major barriers to adoption. Conclusion The case study shows that spatial information is an identified need at local level. Open source GIS software can be used to develop a system to provide local-level stakeholders with spatial information. However, the

  15. Open Source Software Alternatives in Higher Education Following Computer Science Curricula 2013

    Directory of Open Access Journals (Sweden)

    Borislav Stoyanov

    2014-09-01

    Full Text Available In this study we overview the open source software, describe the advantages and disadvantages of using open source software in modern Higher Education following Computer Science Curricula 2013. The study’s main purposes are to clear the understanding of open source software, to present alternatives of the commercial software and demonstrate the potential benefits of integrating open source software in Higher Education.

  16. Open Plot Project: an open-source toolkit for 3-D structural data analysis

    Directory of Open Access Journals (Sweden)

    S. Tavani

    2010-12-01

    Full Text Available In this work we present the Open Plot Project, a software for structural data analysis including a 3-D environment. This first alpha release represents a stand-alone toolkit for structural data analysis and, due to many import/export facilities and to the presence of a 3-D environment, also candidates as a tool to be incorporated in workflows for 3-D geological modelling.

    The software (for both Windows and Linux O.S., the User Manual, a set of example movies, and the source code are provided as Supplement. It is our purpose that the publication of the source code sets the base for the development of a public and free software that, hopefully, the structural geologists community will use, modify, and implement. The creation of additional public controls/tools is strongly encouraged.

  17. Technique of last resort: characteristics of patients undergoing open surgery in the laparoscopic era.

    Science.gov (United States)

    Guend, Hamza; Lee, David Y; Myers, Elizabeth A; Gandhi, Nipa D; Cekic, Vesna; Whelan, Richard L

    2015-09-01

    The utilization rates for minimally invasive colorectal resection techniques (MICR) continue to increase. In some centers MICR methods are the preferred approach, however, open methods continue to be utilized for select patients. In this study, the profile and short-term outcomes of open colorectal resection (CR) and MICR patients are determined and compared. A retrospective review of patients who underwent elective CR over 11 years at two institutions was performed. The MICR group contained both laparoscopic-assisted and hand-assisted cases. The past medical and surgical histories, indications, operations performed, and short-term outcomes were assessed. The Charlson co-morbidity index (CMI) was used to assess risk. During the study period 1080 patients underwent CR (Open, 141; MICR, 939). As judged by the CMI, there were more high-risk patients (score ≥2) in the Open group (34.38%) versus MICR (22.11%) p = 0.0029. Significantly more open patients had prior abdominal surgery and specifically CRs (Open, 15.60% vs. MICR, 2.13%, p MICR 6.8%, p MICR is the procedure of choice, patients selected for Open CR are higher risk and more complex as judged by the CMI and past operative history. Not surprisingly, this translates into a longer length of stay, higher rates of transfusion, diversion, and complications. This disparity in patients undergoing CRs makes direct comparison of MICR and Open resection outcomes not reasonable.

  18. Comparison of Oncologic Short Term Results of Laparoscopic Versus Open Surgery of Rectal Cancer

    Directory of Open Access Journals (Sweden)

    Solati

    2015-06-01

    Full Text Available Background Today, with improvements in laparoscopy technique, surgery of rectal cancer is performed by laparoscopy. Objectives This study was performed to evaluate oncologic results of open versus laparoscopic surgery of rectal cancer in terms of resection margins, removal of lymph nodes and recurrence rate. Patients and Methods This descriptive-analytic study was performed on 88 patients with middle and lower rectal cancer in the two equivalent groups of laparoscopic and open surgery in Mashhad Ghaem and Omid hospitals during 2011 - 2013. Information including age, sex, number of removed and involved lymph nodes, proximal, distal, and radial margins, tumor stage and location, recurrence and disease-free survival collected in the questionnaire and analyzed using descriptive statistics and frequency distribution tables and t-test. Results Both groups of open and laparoscopic surgery had similar characteristics of age, sex, recurrence and disease-free survival, tumor margins and one-year mortality. The number of removed and involved lymph nodes was higher in the laparoscopic group (5.16 vs. 3.55, respectively, with P < 0.050, and 1.74 vs. 0.59 with P = 0.023, but the ratio of involved lymph nodes to the total number of removed lymph nodes was not different between the two groups (LNR (P = 0.071. Tumor stage was higher in the laparoscopic group and most were in stages II and III (P < 0.001. Conclusions Laparoscopic surgery is an effective technique for safe margin and removing lymph nodes in rectal cancer.

  19. Effects of open and closed suction systems on the haemodynamic parameters in cardiac surgery patients.

    Science.gov (United States)

    Özden, Dilek; Görgülü, Refia S

    2015-05-01

    This study was carried out to determine the effects of open and closed suction systems on haemodynamic parameters of the patients who underwent open heart surgery. Nurses should work meticulously and carefully as many complications may develop if the method used to perform suctioning is not appropriate. The quasi-experimental study design was used. The study sample comprised 120 patients who underwent open heart surgery in the cardiovascular surgery intensive care unit of a state hospital in Turkey. Haemodynamic parameters were determined just before, right after, at the 5th and 15th minute after suctioning. The data were evaluated with the One-Way Analysis of Variance (ANOVA) for Repeated Measures, independent t-test and Bonferroni's test for further analysis (post hoc). The difference between heart rate (HR) and mean blood pressure, mean PaO2 and PaCO2 , SaO2 and pH values measured before, right after and at the 5th and 15th minute after suctioning was found to be significant in patients who underwent the open suctioning procedure. It was determined that the difference between mean PaO2 values was not significant and that SaO2 versus SpO2 values increased in patients who underwent the closed suctioning procedure. When the open and closed suction systems were compared, statistically significant difference was determined in terms of MAP, SpO2 . It was determined that HR, arterial blood pressure and arterial blood gases of the patients who underwent open heart surgery were negatively affected by the open suction system but did not increase significantly as soon as suctioning was over during the closed suctioning procedure. The data obtained indicate that closed system suctioning, compared with open system suctioning, can be used safely on this patient group. The closed suction system is recommended since it contributes to the enhancement of patient safety and the quality of nursing care. © 2014 The Authors. Nursing in Critical Care published by John Wiley & Sons

  20. Thoracic aorta coarctation in the adults: open surgery is still the gold standard.

    Science.gov (United States)

    Bozzani, Antonio; Arici, Vittorio; Ragni, Franco

    2013-04-01

    Aortic coarctation (CoA) is the fifth most common congenital heart defect, accounting for 6% to 8% of live births with congenital heart disease. Traditional treatment for CoA consists of open surgical repair, and the endovascular procedures have been proposed as an alternative treatment. We describe the case of a 50-year-old man presented to our department with mild lower limbs claudication and hypertension. The computed tomography scan diagnosed an aortic postductal coarctation, which we treated with aortoplasty with Dacron patch. The open surgery, in our opinion, is nowadays still preferable due to the time-stable and effective outcome.