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[en] This paper presents a general overview of scientific visualization from a historical orientation. It looks first at visualization before the advent of computers, and then goes on to describe the development of early visualization tools in the 'computer age'. There was a surge of interest in visualization in the latter part of the 1980s, following the publication of an NSF report. This sparked the development of a number of major visualization software systems such as AVS and IRIS Explorer. These are described, and the paper concludes with a look at future developments. ((orig.))
[en] Highlights: • A relative decision threshold is proposed as an alternative to the decision threshold. • The relative decision threshold is strictly related to the basic definition of the decision threshold. • The relative decision threshold can be estimated using only the value of the net signal. • The relative uncertainty of the net signal should be compared with the relative decision threshold. • Such test is especially applicable for the results reported by software programs. - Abstract: This work proposes a simple way to assess whether a physical effect due to the sample is present, via the relative uncertainty of the measured net signal. A possibility for evaluation of the respective relative limit for any particular (already measured) positive net signal is shown. This relative limit (‘relative decision threshold’) is strictly related to the basic definition of the decision threshold. The full agreement between the conclusions via the decision threshold and via the relative decision threshold, is experimentally demonstrated.
[en] Due to mandates from recent legislation, clinical decision support (CDS) software is being adopted by radiology practices across the country. This software provides imaging study decision support for referring providers at the point of order entry. CDS systems produce a large volume of data, providing opportunities for research and quality improvement. In order to better visualize and analyze trends in this data, an interactive data visualization dashboard was created using a commercially available data visualization platform. Following the integration of a commercially available clinical decision support product into the electronic health record, a dashboard was created using a commercially available data visualization platform (Tableau, Seattle, WA). Data generated by the CDS were exported from the data warehouse, where they were stored, into the platform. This allowed for real-time visualization of the data generated by the decision support software. The creation of the dashboard allowed the output from the CDS platform to be more easily analyzed and facilitated hypothesis generation. Integrating data visualization tools into clinical decision support tools allows for easier data analysis and can streamline research and quality improvement efforts.
[en] Every day a large amount of data is produced within a radiotherapy department. Although this data is available in one form or other within the centralised systems, it is often not in the form which is of interest to the departmental staff. This work presents a flexible browser based reporting and visualization system for clinical and scientific use, not currently found in commercially available software such as MOSAIQ"T"M or ARIA"T"M. Moreover, the majority of user merely wish to retrieve data and not record and/or modify data. Thus the idea was conceived, to present the user with all relevant information in a simple and effective manner in the form of web-services. Due to the widespread availability of the internet, most people can master the use of a web-browser. Ultimately the aim is to optimize clinical procedures, enhance transparency and improve revenue. Our working group (BAS) examined many internal procedures, to find out whether relevant information suitable for our purposes lay therein. After the results were collated, it was necessary to select an effective software platform. After a more detailed analysis of all data, it became clear that the implementation of web-services was appropriate. In our institute several such web-based information services had already been developed over the last few years, with which we gained invaluable experience. Moreover, we strived for high acceptance amongst staff members. By employing web-services, we attained high effectiveness, transparency and efficient information processing for the user. Furthermore, we achieved an almost maintenance-free and low support system. The aim of the project, making web-based information available to the user from the departmental system MOSAIQ, physician letter system MEDATEC"R and the central finding server MiraPlus (laboratory, pathology and radiology) were implemented without restrictions. Due to widespread use of web-based technology the training effort was effectively nil, since practically every member of staff can master the use of a web-browser. Moreover, we have achieved high acceptance amongst staff members and have improved our effectiveness resulting in a considerable time saving. The many MOSAIQ-specific parts of the system can be readily used by departments which use MOSAIQ as the departmental system
[en] After a preliminary survey and a description of some small Steiner systems from the standpoint of the theory of invariants of binary forms, we construct a binary Golay code (of length 24) using ideas from J. Grassmann's thesis of 1875. One of our tools is a pair of disjoint Fano planes. Another application of such pairs and properties of plane quartics is a construction of a new block design on 28 objects. This block design is a part of a dissection of the set of 288 Aronhold sevens. The dissection distributes the Aronhold sevens into 8 disjoint block designs of this type
[en] Estimation of doses to people exposed to ionizing radiation due to inhalation or ingestion of radio-active materials is often based on calculations of the activity in the tissues of the body and in excreta following a given intake. Comparison between these calculations and laboratory measurements of the activity in excreta or in tissues of the body enables estimation of the amount of radioactive material which entered the body and hence the expected committed doses. These calculations are based on a set of models recommended by the ICRP that describe the paths of the radioisotope in the body and provide the equations to calculate their transfer rates within the body and out of it. During the last decade the ICRP made major revisions in its recommendations regarding protection from ionizing radiation and in particular it recommended the use of new models for estimating doses due to inhalation and ingestion of radioisotope. Among the new models are that of the new respiratory tract presented in ICRP publication no. 66 and the biokinetic models for various radioisotopes which have been presented in publications 56 to 71. All the new models have been developed to enable dose estimation for the general public, including children. They are based on physiological processes in order to enable adjustment for age, gender, and physical condition. In a previous paper  we presented a new Internal Dosimetry code developed at Soreq (InDose) to enable making assessments based on these new models. Up to now, only the new model has been applied for dose estimations in generally available PC package codes (e.g., LUDEP-2 and Genmod), while the new biokinetic models have not. Recently, ICRP presented publication 78  - which is a replacement of publication 54 - in which it gives monitoring data recalculated with the new biokinetic models. However, the data are only for acute or constant value chronic intakes. It employs the standard 5 vm particles in cases of intake by inhalation
[en] The current paper describe how a magnetohydrodynamic problem has been implemented using FLUENT MHD module. The computation is necessary for further calculation for electromagnetic pumps. All the results has been verified by compare obtain data with data obtain by other persons. The first evaluation consist on comparing the resulting flow path and current density position with the theoretical position. (authors)
[en] Clonogenic assays are a useful tool to test whether a given cancer therapy can reduce the clonogenic survival of tumour cells. A colony is defined as a cluster of at least 50 cells which can often only be determined microscopically. The process of counting colonies is very extensive work and so we developed software that is able to count the colonies automatically from scanned flasks. This software is made freely available by us with a detailed description how to use and install the necessary features