5,200 research outputs found

    Converting relational databases into object relational databases

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    This paper proposes an approach for migrating existing Relational DataBases (RDBs) into Object-Relational DataBases (ORDBs). The approach is superior to existing proposals as it can generate not only the target schema but also the data instances. The solution takes an existing RDB as input, enriches its metadata representation with required semantics, and generates an enhanced canonical data model, which captures essential characteristics of the target ORDB, and is suitable for migration. A prototype has been developed, which migrates successfully RDBs into ORDBs (Oracle 11g) based on the canonical model. The experimental results were very encouraging, demonstrating that the proposed approach is feasible, efficient and correct

    Increased regeneration efficiency of _Brassica napus_ L. cultivars Star, Westar and Cyclone from hypocotyle and cotyledonary explants

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    The comparative organogenesis of _Brassica napus_ L cultivars Cyclone, Star and Westar was studied. The cotyledonary explants gave a higher response to all the combinations of 0.5 mg/L 2,4-D and BAP (0.5, 1.0,1.5 and 2.0 mg/L} used for optimizing the conditions for callus induction. The best mean weight and mean length of callus was obtained at 0.5 mg/L 2,4-D and 1.5mg/L BAP for Star cotyledonary explants. For the complete plant regeneration the new method of exposing the explants culture to Growth regulator free medium was performed. The method was applicable to both hypocotyl and cotyledonary explants. The Shoot Induction Frequency for hypocotyl (6-34%) in the three cultivars is higher than the cotyledonary explants (3-23%). The method is speedy and almost all of the shoots and some unshooted calli (78%) form roots on the same media without prior transfer to rooting medium

    Penetrating toothbrush injury in a child: an unusual presentation

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    We present an unusual case of a penetrating toothbrush injury in a 6-year old child. The injury was sustained due to a fall at home and resulted in accidental implantation of an adult toothbrush in the facial soft tissues. The toothbrush was removed unde

    An unusual case of chronic suppurative osteomyelitis of the mandible

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    Osteomyelitis of the mandible, a serious complication of untreated odontogenic infection has been reported. This case report describes an interesting presentation of chronic suppurative osteomyelitis (CSO) of the mandible in a 13 years old anaemic male p

    Solving Troesch's problem by using modified nonlinear shooting method

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    In this research article, the non - linear shooting method is modified (MNLSM) and is considered to simulate Troesch’s sensitive problem (TSP) numerically. TSP is a 2nd order non - linear BVP with Dirichlet boundary conditions . In M NLSM , classical 4 th order Runge - Kutta method is replaced by Adams - Bashforth - Moulton method, both for systems of ODEs . MNLSM showed to be efficient and is easy for implementation. Numerical results are given to show the performance of MNLSM, compared to the exact solution and to the results by He’s polynomials. Also, discussion of results and the comparison with other applied techniques from the literature are given for TSP

    Performance evaluation of an RDB and an ORDB: A comparative study using the BUCKY benchmark

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    This paper highlights the functionality of object-based database systems by comparing the performance of relational database (RDB) and object-relational database (ORDB) systems. The study focuses on assessing the efficiency of database systems based on query processing and object complexity. We conducted an experiment that includes running the queries on the RDB and ORDB that were used in the BUCKY benchmark and implemented on Oracle 11g. The findings of this research show that the performance of both database systems depends on various factors, such as the size and type of databases, the schema and query structures, the number of tuples scanned in tables, indexes as well as the environment, in which the experiment was carried out

    Interventions for improving research productivity in clinical radiology

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    The purpose of this study was to evaluate the effects of research promotion activities on overall quality and quantity of research output in a clinical department of a teaching tertiary care hospital. Simple research enhancing strategies including regular journal club, research hour, basic research skills training, hiring of research faculty, research awards, and annual research retreat and research board to increase research production were implemented in the Department of Radiology of a teaching hospital in Pakistan. A total of 77 papers were produced by the Department of Radiology before the intervention, which increased to 92 after the introduction of research initiatives. There was a significant increase in the overall proportion of publications in the international journals after the intervention (p \u3c 0.001) with an increasing trend towards indexed journals (p \u3c 0.001). The research enhancing interventions had a positive effect on increasing clinical research output by the Department of Radiology. Such interventions can also be replicated in other clinical departments to increase their research productivity

    Focused abdominal CT scan for acute appendicitis in children: can it help in need

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    OBJECTIVE: To evaluate the focused abdominal CT scan [FACT] in clinically equivocal cases of acute appendicitis in paediatric population. METHODS: A cross-sectional study was conducted at the Radiology Department of Aga Khan Hospital, from August 2007 to November 2008. A total of 84 patients (42 males & 42 females) with clinically equivocal signs and symptoms of acute appendicitis referred to radiology department for CT evaluation were studied. CT findings were compared with histopathology and clinical follow-up. RESULTS: The sensitivity of focused CT for acute appendicitis was 91%; specificity was 69% and accuracy of 76% while PPV and NPV were 58%, 94% respectively. CONCLUSION: Focused unenhanced CT is a quick, accurate and non invasive modality for the assessment of clinically equivocal cases of acute appendicitis for ruling out patients and reducing negative appendectomies
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