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At least 307 records · Page 17Linked to original sources

PubMed2003

Multitracer: a Java-based tool for anatomic delineation of grayscale volumetric images.

A Java-based tool for delineating anatomic boundaries in 8- and 16- bit grayscale volumetric images is described. Modern features implemented by the tool include the ability to simultaneously view the current cursor position and the previously delineated boundaries on three orthogonal planes, the ability to magnify images during delineation using high-quality interpolation, the ability to encode and save boundaries with subvoxel resolution, and the ability to utilize coregistered images interchangeably during delineation. Additional features facilitate use of the tool in a multiuser, multiplatform environment and provide support for the documentation of anatomic delineation protocols. In addition to providing direct estimates of structure volumes, areas, and lengths, the tool allows contoured boundaries to be exported for more sophisticated analyses. The tool also provides support for manual editing of image volumes to remove confounding structures and for manual correction of image volumes that have been inaccurately edited. In addition to its research utility, the tool also has potential value in education, allowing students to interact with volumetric data and structural boundaries in three dimensions.

Artifacts↗

PubMed1999

Using practical quality improvement approaches and tools in reproductive health services in east Africa.

BACKGROUND: A nonprofit, nongovernment organization, AVSC International provides technical assistance worldwide, including a range of reproductive health services and quality improvement (QI) approaches and tools. Current activities in East Africa involve several hundred sites, including referral hospitals, district-level hospitals, and individual family planning clinics. THE QI PACKAGE: AVSC and its local partners developed Client-Oriented, Provider-Efficient Services (COPE), a problem-solving process and set of tools to involve all levels of site staff members in assessing and improving the services. The COPE tools--self-assessment guides, client interview guides, client flow analyses, and action plans--promote involvement, ownership, and commitment to the QI process. Facilitative supervision and whole-site training complemented AVSC's traditional approaches of medical monitoring and informed choice. Facilitative supervision encourages supervisors and managers to consider staff members as internal customers, whose needs they must meet for staff to be able to meet the needs of external customers (clients). Whole-site training was developed to meet the needs of staff members and providers, who needed to function as a team responsible for providing high-quality services. CASE STUDY: A government hospital that has adopted the entire package of QI approaches, has used the Quality Improvement Quotient self-assessment surveys to track its progress in several elements of high-quality care, including management and supervision, safety, and information and client--provider interactions. For example, maternity ward staff learned how to pass on to their clients information about clients' rights and family planning methods through posters, pamphlets, sample contraceptives, and health talks. LESSONS LEARNED: AVSC's work with local organizations suggests a number of lessons learned, including the following: easy-to-use tools that promote staff involvement and ownership are essential in the QI process, QI requires considerable staff development and capacity building at all levels, and although the QI approaches were initially introduced for a relatively narrow field of services, they are applicable to and have increasingly been used in other departments and wards. (It is difficult, may be impossible, and certainly undesirable, to limit QI activities to one ward or service.) CONCLUSION: Activities in East Africa have shown that QI is possible even in very resource-poor settings. The same principles have guided the process in all the different programs, with some adaptation of the tools used. AVSC program activities are to continue to disseminate the experiences of sites implementing the package of tools and approaches, to advocate for investment in supervision and management capacity building as a means to support continuous quality improvement, and to further study the impact of the QI approaches on service quality.

Adult↗

PubMed1994

Affordances, perceptual complexity, and the development of tool use.

Perceiving the affordance of a tool requires the integration of several complementary relationships among actor, tool, and target. Highers order affordance structures are introduced to deal with these forms of complex action from an ecological-realist point of view. The complexity of the higher order affordance structure was used to predict the difficulty of perceiving the tool function. Predictions were tested in 3 experiments involving children between 9 months and 4 years old. In a classical tool use task dating back to W. Köhler, a desirable target was obtained by using a hook as a tool. The relative positions of the hook and the target were systematically varied to obtain structures differing in complexity. The observed difficulty of the task was found essentially in accordance with the theoretical complexity of the higher order affordance structures involved in perceiving the tool function.

Child, Preschool↗

PubMed2005

Gorillas (Gorilla gorilla) and orangutans (Pongo pygmaeus) encode relevant problem features in a tool-using task.

Two important elements in problem solving are the abilities to encode relevant task features and to combine multiple actions to achieve the goal. The authors investigated these 2 elements in a task in which gorillas (Gorilla gorilla) and orangutans (Pongo pygmaeus) had to use a tool to retrieve an out-of-reach reward. Subjects were able to select tools of an appropriate length to reach the reward even when the position of the reward and tools were not simultaneously visible. When presented with tools that were too short to retrieve the reward, subjects were more likely to refuse to use them than when tools were the appropriate length. Subjects were proficient at using tools in sequence to retrieve the reward.

Animals↗

PubMed2005

How prosimian primates represent tools: experiments with two lemur species (Eulemur fulvus and Lemur catta).

The authors examined how 2 lemur species (Eulemur fulvus and Lemur catta) reason about tools. Experiment 1 allowed subjects to use 1 of 2 canes to retrieve an inaccessible food reward. Lemurs learned to solve this problem as quickly as other primates. Experiment 2 then presented subjects with novel tools differing from the originals along one featural dimension. Subjects attended more to tools' sizes than to their colors and made no distinction between tools' shapes and textures. Experiments 3 and 4 presented problems in which some of the tools' orientations had to be modified relative to the food. Subjects performed well on these problems, sometimes modifying the position of the tool. These results are discussed in light of the performance of other primates on this task.

Animals↗

PubMed2004

Validity and reproducibility of a computerised tool for assessing the iron, calcium and vitamin C intake of Belgian women.

OBJECTIVE: To determine the relative validity of a newly developed iron intake assessment tool, designed specifically to assess iron, calcium and vitamin C intake. DESIGN: Estimates of iron, calcium and vitamin C intake from a computerised iron intake assessment tool compared with those from 11-day estimated dietary records. SETTING: Region of Ghent (N= +/- 225,000), a city in Flanders, the Dutch-speaking part of Belgium. SUBJECTS: In all, 50 women aged 18-39 y, participating in a large-scale epidemiological study on iron intake and iron status. MAIN RESULTS: Mean dietary iron intake from the 11-day food record, the unadjusted dietary iron intake assessment tool and the adjusted tool was, respectively, 10.5 +/- 2.7, 10.4 +/- 4.3 and 9.6 +/- 2.9 mg. For the different nutrients, the correlation coefficients vary from 0.45 to 0.60 for adjusted intake. The mean difference of iron intake by the two methods (0.8 +/- 2.9 mg) did not differ significantly from zero. The new method correctly classified 38% (iron), 38% (calcium) and 58% (vitamin C) of the subjects to the correct tertile. The correlation coefficients ranged from 0.48 for adjusted vitamin C intake to 0.73 for adjusted calcium intake between two administrations. CONCLUSION: The newly developed instrument can be used to assess mean group intakes of iron, calcium and vitamin C in women consuming a Western diet. However, since the ranking capability of the new tool is rather weak, further refinement of the tool is required to produce a robust method for assessing iron, calcium and vitamin C intakes of individuals. SPONSORSHIP: This research was supported by the Belgian National Fund for Scientific Research/Flemish Division (Fund No G.0152.01).

Adolescent↗

PubMed2003

Impacts on practitioners of using research-based carer assessment tools: experiences from the UK, Canada and Sweden, with insights from Australia.

Researchers and practitioners in several Western countries have recently developed tools for assessing the situation of the carers of adults who are ill, elderly or have disabilities. The present article describes the impact of three such assessment tools, from Canada, the UK and Sweden, on the professional practice of assessors. All tools were tested in agency-based studies. Focus groups, workshops and interviews with assessors were employed to understand the impact on professionals and their practice. An Australian researcher and case manager comments on these experiences from her unique perspective. The results reveal that the use of carer assessments can lead to changes in the appropriateness of intervention by informing practitioners of issues which are given little attention, but which impact on the adequacy of interventions to the service user. Across the projects, most workers found that the tools facilitated a more comprehensive, in-depth and carer-focused assessment. Experience across all the projects suggests that, used sensitively, such tools and approaches can play a key role in transforming the relationship between carers, and the health and social care system. Giving carers a legitimate voice, acknowledging their perspective and expertise, and making them central to assessment processes accords them status both as active partners, and as individuals with their own needs and aspirations, rather than seeing them primarily as resources. As a result of their experiences, many workers and administrators concluded that home-care programmes must change their mandate to include carers among their clients, raising the issue of available monetary and human resources to meet the needs of this group. In addition, as our Australian colleague points out, time, efficiency, relevance, benefit and minimal intrusiveness are important factors for practitioners which influence their use of assessment tools.

Aged↗

PubMed1997

Development of a tool to rate the quality assessment of randomized controlled trials using a Delphi technique.

The aim of this study was to develop a quality of study tool rate the methodological quality of individual primary randomized controlled trials (RCTs) to be included in a meta-analysis. A Delphi-technique using several rounds of questions to seek consensus, among trialists, on criteria important in a RCT was used. Eight trialists formed the Delphi panel. The developed quality of study tool consisted of 53 items in 15 dimensions. The tool was tested for reliability and validity. Unlike many other quality assessment tools, the developed tool may be used to rate numerically each primary study. This is important in reviews or in meta-analyses where one objective may be to ascertain whether those studies of a higher quality exhibit different results to reviewing studies of lower quality. The tool needs further testing.

Clinical Nursing Research↗

PubMed2003

A structured health needs assessment tool: acceptability and effectiveness for health visiting.

BACKGROUND: There is, nominally at least, a universal health visiting service in Great Britain, although the frequency of contacts may be severely restricted. Debates about whether home visiting should be universal or selective, therefore, focus on whether health visitors should use professional judgement or structured assessment tools to target attention within their caseload. Research attention has focused mainly on unstructured needs assessments and professional judgment or the development of assessment tools, so that the views of practitioners using structured instruments and their clients are not known. METHODS: A two-phase qualitative study examined the acceptability and effectiveness of a structured health needs assessment tool (HNAT) implemented in London. Views about the tool were elicited from 30 health visitors through telephone interview, and then 21 assessments were observed and tape-recorded; 19 clients were interviewed after the event. Data were evaluated for adequate coverage of views across the target population and analysed using the framework approach. FINDINGS: A range of views were expressed, but the HNAT caused anxiety and distress to, particularly, the most vulnerable clients. The structured format of the tool appeared to encourage the health visitors to question instead of listen. It did not help to identify all the needs and intruded into normal practice in an insensitive and unhelpful way. LIMITATIONS: This study investigated only one form of structured HNAT. These are commonly used to prioritize undifferentiated needs of clients who have been offered an unsolicited, health promoting service. Our findings therefore do not apply to validated instruments used for screening or specific diagnostic purposes where a client has requested help with a problem. CONCLUSIONS: Given the problems in use and potential for harm, this form of structured assessment tool appears unsuitable for routine use to determine the intensity of health visiting contacts.

Community Health Nursing↗

PubMed2002

The methodology of nutritional screening and assessment tools.

BACKGROUND: The aim of this paper was to give a critical appraisal of the methodology of nutritional screening and assessment tools. METHODS: A literature search identified 44 tools. Each tool was assessed in relation to details of its application, method of derivation and evaluation of its performance. RESULTS: The findings indicate that tools were published with insufficient details regarding their intended use and method of derivation, and with an inadequate assessment of their effectiveness. An appraisal of these features judged that no one tool satisfied a set of criteria regarding scientific merit. CONCLUSION: There is thus a need to ensure that nutritional screening and assessment tools are developed using procedures based on good design and sound statistical practice. This paper suggests that a unified approach using multivariate techniques could make a significant contribution to this process.

Humans↗

PubMed2002

Are there commonalities among audit tools used to measure carotid endarterectomy outcomes in New South Wales?

BACKGROUND: To prepare for a state-wide audit of carotid endarterectomy (CEA), we sought to ascertain pre-existing practices and identify common process and outcome measures among audits tools used by NSW vascular surgeons. METHOD: Telephone survey comprising five questions about CEA audit practices. RESULTS: Of 37 known vascular surgeons in NSW, all performed CEA and agreed to participate in our telephone survey (response rate 100%). All but one reported collecting CEA data (97%). Two thirds of these collected data prospectively. From those 19 surgeons (51%) who stated that they used standard tools for audit, we received five CEA-specific tools. Process measures common to all five were: side of CEA, date of operation, sex, past history of hypertension, history of diabetes, use of shunt, use of patch. There were only three outcome measures common to all five CEA-specific tools: postoperative transient ischaemic attack (TIA), postoperative stroke, and postoperative death. Data about outcomes beyond discharge were inconsistently collected. CONCLUSIONS: While most vascular surgeons in NSW report collecting information about CEA outcomes, not all do so prospectively. Only three outcomes (postoperative TIA, postoperative stroke and death) were common to all tools, inviting the development and use of a comprehensive and standard tool.

Endarterectomy, Carotid↗

PubMed2003

Improving skilled attendance at delivery: a preliminary report of the SAFE strategy development tool.

BACKGROUND: Increasing the proportion of births with skilled attendance is advocated by international agencies as a key factor in reducing maternal and perinatal mortality and morbidity. The SAFE Strategy Development Tool is designed to enable policy makers and planners to gather and interpret information systematically to develop strategies for improving skilled attendance at birth. METHOD: Five modules were developed with partners in Bangladesh, Ghana, Jamaica, Malawi, and Mexico to guide the identification of problems related to skilled attendance, the collection of primary and secondary evidence, and the synthesis of this evidence to formulate strategies. The involvement of key players, including policy makers, is emphasized throughout the application of the tool and is vital to its success. RESULTS: The SAFE Strategy Development Tool was field tested in five collaborating countries. The methods employed by this tool were found to be feasible and produced evidence that will be useful in the formulation of strategies. Application of the tool can be completed in 3 to 5 months, and was estimated to cost between US$12,938 and US$15,627 for applications at district or subdistrict level. The final strategy options developed from the findings were presented at an international workshop in Aberdeen, Scotland, in February 2003. CONCLUSION: The SAFE Strategy Development Tool is now available to governments, organizations, and institutions involved in the implementation of maternal health programs.

Data Collection↗

PubMed2005

Short-term changes in upper extremity dynamic mechanical response parameters following power hand tool use.

Dynamic mechanical response parameters (stiffness, damping and effective mass), physiological properties (strength and swelling) and symptoms of the upper limb were measured before power tool operation, immediately following and 24 h after power tool operation. Tool factors, including peak torque (3 Nm and 9 Nm) and torque build-up time (50 ms and 250 ms), were controlled in a full factorial design. Twenty-nine inexperienced power hand tool users were randomly assigned to one of four conditions and operated a pistol grip nutrunner four times per min for 1 h in the laboratory. Isometric strength decreased immediately following tool use (15%) (p < 0.01) and 24 h later (9%) (p < 0.05). Mechanical parameters of stiffness (p < 0.05) and effective mass (p < 0.05) were affected by build-up time. An average decrease in stiffness (43%) and effective mass (57%) of the upper limb was observed immediately following pistol grip nutrunner operation for the long (250 ms) build-up time. A previously developed biomechanical model was used to estimate handle force and displacement associated with the tool factors in the experiment. The conditions associated with the greatest predicted handle force and displacement had the greatest decrease in mechanical stiffness and effective mass, and the greatest increase in localized discomfort.

Adolescent↗

PubMedDate not supplied

An image visualization tool in mammography.

The poor detectability of diagnostic mammographic features, due to their low contrast, is dealt with by a software visualization tool. The tool is domain specific to medical imaging and consequently mammographic imaging, and it is envisaged as part of medical image visualization and manipulation stations. Domain specificity is served by the tool conformance to DICOM 3.0 part 10 image format specifications, specifically PAPYRUS 3.0, window width/level display adjustments of image dynamic range of up to 16 bits, and application of visualization operations to user-defined regions of interest in addition to global operations. The software has been designed and implemented according to an object oriented approach in Visual C++. The tool user interface is friendly, based on a widely used windowing paradigm, the Microsoft Foundation Class library version 4.2, which provides interface items, such as windows, dialogue boxes, lists, slide bars, buttons, etc. The visualization functionality offered by the tool relies on the following three categories of image processing algorithms: dynamic range adjustments by pixel intensity transformations, contrast enhancement and noise suppression by spatial domain direct manipulation of image pixels or by manipulation of wavelet coefficients. The first two categories of algorithms are implemented in real time. Initial use of the tool has demonstrated its potential in improving the detectability of diagnostic mammographic image features.

Algorithms↗

PubMed2004

Ergonomics. A checklist for the ergonomic evaluation of nonpowered hand tools.

A checklist was developed to evaluate nonpowered hand tools for basic features related to good ergonomic tool design. The checklist contains 16 items to which a yes/no response is required. The checklist is intended to be used by tradespersons and is written in clear, simple language. This column reports on a study conducted to examine the reliability of the checklist questions in identifying the presence or absence of the basic ergonomic design features that are believed to be important for nonpowered hand tools. Using the checklist, 14 ergonomists and 126 carpenters evaluated 18 typical hand tools. Agreement among the carpenters and ergonomists was high for most of the checklist items. A few checklist questions were associated with relatively low agreement among raters in terms of the presence or absence of a design feature. Lack of agreement between raters indicates that the criterion was not explicit or that users had difficulty identifying whether the tool satisfied the particular criterion. The majority of the 18 hand tools evaluated were deemed to be lacking in multiple highly important ergonomic design features. Additional studies are being conducted to make appropriate revisions to the checklist criteria based on quantitative measures of musculoskeletal loading.

Adult↗

PubMed2005

Nanoliter dispensing for uHTS using pin tools.

Miniaturization of assays is an important objective in Ultra-HTS. One of the major obstacles has been to find fluid handling systems capable of reliably and accurately delivering between 2 and 200 nl of test compound to assay plates. New methods of forming pins, placing slots in the pins, and hydrophobic coatings bonded onto the pins solve many of the problems encountered by early pin tools. Unlike other low-volume liquid handlers, these new pin tools provide the ability to transfer approximately 2 nl-5 microl of compounds. These pin tools can also use low-volume source plates (2-10 microl) and achieve an accuracy of better than 5%. This, coupled with the ability to transfer small volumes directly from the compound library to assay plates without an intervening dilution plate, saves reagents, throughput time, and consumables and is, therefore, very cost effective. Pin tool compound transfers in the 2-100 nl range provide a simple method to dilute away from the toxic effect that dimethyl sulfoxide has on some assay target cells. The factors that affect liquid transfers by pin tools are discussed in detail as well as the advantages and limitations of pin tools.

Biological Assay↗

PubMed2026

MaizeGDB Phylostrata Tool: exploring evolutionary origins of maize proteins.

MOTIVATION: Phylostratigraphic analysis identifies the evolutionary origins and level of conservation of proteins, facilitating research in evolutionary biology and comparative genomics. RESULTS: We developed the MaizeGDB Phylostrata Tool, a custom web application that enables users to explore the evolutionary origins of proteins in maize (Zea mays), a globally important crop and model organism. This tool features interactive visualizations and detailed gene pages incorporating subcellular localization, Gene Ontology (GO) terms, and links to resources for homologs, facilitating comparison of gene functions across evolutionary time. The tool also provides downloadable links for full-proteome phylostratigraphic results for 26 maize inbreds (B73 and the NAM founders). From these, we identified genome- and subgenome-wide trends, finding that more conserved proteins tended to be longer and more highly expressed. Finally, we provide code including updates to the "phylostratr" R package to make it more robust against taxonomic updates, as well as example scripts for phylostratigraphic analysis and web tool development for researchers and curators of other species. AVAILABILITY AND IMPLEMENTATION: The MaizeGDB Phylostrata Tool is freely available at https://phylostrata.maizegdb.org. Scripts used for the analysis and web tool are available at https://github.com/LTibbs/PhylostrataWebtool.

Journal Article↗

PubMed2002

The Pathway Tools software.

MOTIVATION: Bioinformatics requires reusable software tools for creating model-organism databases (MODs). RESULTS: The Pathway Tools is a reusable, production-quality software environment for creating a type of MOD called a Pathway/Genome Database (PGDB). A PGDB such as EcoCyc (see http://ecocyc.org) integrates our evolving understanding of the genes, proteins, metabolic network, and genetic network of an organism. This paper provides an overview of the four main components of the Pathway Tools: The PathoLogic component supports creation of new PGDBs from the annotated genome of an organism. The Pathway/Genome Navigator provides query, visualization, and Web-publishing services for PGDBs. The Pathway/Genome Editors support interactive updating of PGDBs. The Pathway Tools ontology defines the schema of PGDBs. The Pathway Tools makes use of the Ocelot object database system for data management services for PGDBs. The Pathway Tools has been used to build PGDBs for 13 organisms within SRI and by external users.

Abstracting and Indexing↗