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At least 649 records · Page 36Linked to original sources
PubMed2004

Conditioned spikes: a simple and fast method to represent rates and temporal patterns in multielectrode recordings.

Increasing evidence suggests that the brain utilizes distributed codes that can only be analyzed by simultaneously recording the activity of multiple neurons. This paper introduces a new methodology for studying neural ensemble recordings. The method uses a novel representation to provide complementary information about the stimuli which are contained in the temporal pattern of the spike sequence. By using this procedure, a high correlation of synchronized events with stimuli times is apparent. To quantify the results and to compare the performance of this method against the most traditional raster plot, we have used Fano factor and cross-correlation analysis. Our results suggest that several consecutive spikes from different neurons within an extended time window may encode behaviorally relevant information. We propose that this new representation, in addition to the other approaches currently used (standard raster plots, multivariate statistical methods, neuronal networks, information theory, etc.), can be a useful procedure to describe population spike dynamics.

Action Potentials↗
PubMed1994

On-line information sources on chemical substances.

Information technology has brought about changes in the work patterns of researchers and scientists. After some hints on the on-line facilities needed to be connected to the international host computers, an analysis is made of some of the main automated sources available to retrieve information on chemical substances. Special emphasis is given to textual-numeric data banks, first reviewing the main chemical dictionaries, like Registry and Chemline, and then focusing on those sources that offer immediate information in case of emergency. Among the Toxnet files, produced and managed within the US National Library of Medicine Toxicology Information Program, play a very important role in offering publicly available data on toxicology and on hazardous chemicals. Therefore, the Hazardous Substances Data Bank (HSDB) and the Registry of Toxic Effects of Chemical Substances (RTECS) are described for their relevance thereon. Other data banks produced in Europe, like the Environmental Chemicals Data Information Network (ECDIN) and the very specialized Major Hazard Incident Data Service (MHIDAS) are also briefly outlined. To integrate this overview on online information, the attention is then shifted on sources having the characteristic of reference databases: prestigious files covering the international scientific literature, as CA/Chemabs, Toxline/Toxlit, Embase, Medline are introduced. Implications of on-line technology in enhancing information access in the next future are discussed, pointing out the new tools created to meet the information needs of end-users.

Databases, Bibliographic↗
PubMed2000

Three-state neural network: from mutual information to the Hamiltonian.

The mutual information, I, of the three-state neural network can be obtained exactly for the mean-field architecture, as a function of three macroscopic parameters: the overlap, the neural activity and the activity-overlap, i.e., the overlap restricted to the active neurons. We perform an expansion of I on the overlap and the activity-overlap, around their values for neurons almost independent of the patterns. From this expansion we obtain an expression for a Hamiltonian which optimizes the retrieval properties of this system. This Hamiltonian has the form of a disordered Blume-Emery-Griffiths model. The dynamics corresponding to this Hamiltonian is found. As a special characteristic of such a network, we see that information can survive even if no overlap is present. Hence the basin of attraction of the patterns and the retrieval capacity is much larger than for the Hopfield network. The extreme diluted version is analyzed, the curves of information are plotted and the phase diagrams are built.

Models, Neurological↗
PubMed2004

Securing your PC and protecting your privacy.

Working in a networked information environment brings new opportunities for getting and sharing information. Regrettably, these benefits of the Internet are challenged by forces that would interfere to satisfy their own profit or malevolent motives. Your networked computer can be infected by viruses, worms, or Trojan horses or infiltrated by spyware, adware, or pop-ups. Without being aware of the dangers and taking precautionary steps, your PC is susceptible to being compromised and your privacy invaded. This column will highlight some of the dangers and offer basic steps for securing your computer and protecting your privacy.

Computer Security↗
PubMed2006

RHIOs--build in healthcare fraud management from the beginning.

This article presents the Department of Health and Human Services, Office of the National Coordinator for Health Information Technology's field-based research on the use of Health Information Technology to Advance and Expand Healthcare Anti-Fraud Activities.' The authors of this article directed and performed this research under contract to the Foundation of Research and Education of AHIMA. There is a tremendous potential to reduce healthcare fraud and achieve substantial financial benefits using a nationwide health information network with interoperable electronic health records. To achieve these benefits, there must be interoperability among providers and between providers and payers. The article will provide recommendations for regional health information organizations to incorporate healthcare fraud management in their early designs.

Computer Communication Networks↗
PubMed1993

A study on the development of a filing system for funduscopic images with a personal computer for Twin AMHTS.

A filing system for ocular funduscopic image data was developed by using a personal computer for the Twin AMHTS. The development of the system was tried as one of the data transfer system including image data between two similar AMHTSs named the Twin AMHTS through the information network system. The filing system is capable of storing 26782 data of ophthalmoscopic pictures with a data compression mode by using a magneto-optical disk (MOD) whose storage capacity of both sides is 616 MB. It takes no long time for retrieval and display of the image data in the filing system. Good quality of compression and decompression obtained and reproducibility of the ocular fundus picture is favorable regardless of normal or abnormal cases. As a result, it is suggested that the developed system has practical utility although it requires more improvement.

Computer Communication Networks↗
PubMed1996

Can computer-aided systems engineering tools enhance the development of health care information systems? A critical analysis.

Computer-aided systems engineering (CASE) is a software technology that helps systems developers write complex application programs. CASE has been identified as having the potential to help health information systems developers complete large-scale projects such as the computer-based patient record or community health information network. The article evaluates the current use of CASE in health care and other settings through a review of the literature. There is no consensus on the value of CASE. Many experts believe that it is an emerging technology that will become widespread, whereas others see it as expensive and cumbersome to use.

Community Networks↗
PubMed2002

Researching drug information needs in Australia.

National research about drug information needs and access strategies from a cross-section of professionals and community respondents was undertaken in conjunction with the development of the Australian Drug Information Network (ADIN). Many professionals who have an active concern about drug and alcohol issues experience frustration with their access to high quality and relevant drug information. Although the Internet is widely perceived to be the answer to disseminating information, it remains the least favoured source of drug information among professionals, especially in regional and remote locations. Limited access to technology and doubts about the quality of web-based information were expressed concerns. Community differences about where and how to access information were also apparent, with the Internet being a more feasible resource for metropolitan and younger respondents.

Australia↗
PubMed1983

Collaboration and work sharing of drug information services in the United Kingdom.

The United Kingdom Drug Information Network has been developed in recent years to form an effective service. The structure of the health service is discussed and the organization of drug information services within this framework is outlined. A number of collaborative and work sharing exercises have been undertaken between regional services and thus are reviewed together with future trends for the service.

Drug Information Services↗
PubMedDate not supplied

Two steps forward, one step back.

Participants at a community health information network in Glens Falls, N.Y., have come face-to-face with obstacles that could have meant the end to this rural health network that the New York Department of Health and the John A. Hartford Foundation helped launch more than two years ago. Instead, John Laliberte, Glens Falls Hospital's director of information systems, and the rest of the IS team are recovering from some setbacks and preparing to increase the CHIN's capabilities.

Community Networks↗
PubMed2000

Selective Influence and Response Time Cumulative Distribution Functions in Serial-Parallel Task Networks.

We analyze sets of mental processes, some of which are concurrent and some of which are sequential, under the assumption that the processes are partially ordered, that is, arranged in a directed acyclic network. Information about the process arrangement can be discovered by examining the effects on response time of selectively influencing process durations. Previous work has mainly focused on analyses of mean response times. Here we consider analyses based on cumulative distribution functions, for one of the major classes of directed acyclic networks, serial-parallel networks. When two processes are selectively influenced, patterns in the cumulative distribution functions can be used to test whether the processes are sequential or concurrent and whether the task network has AND gates or OR gates. Cumulative distribution functions are potentially more informative than means, and some previous results for means are shown to follow from our results for cumulative distribution functions. Copyright 2000 Academic Press.

Journal Article↗
PubMed1984

Social networks and support during the crisis of heart attack.

The type, source, and extent of support received by the families of heart attack victims were investigated in this study to shed light on the nature of families' informal support systems. The author concludes that grown-up children and friends and neighbors were families' greatest source of emotional support but that professional intervention is needed to mobilize and supplement informal networks.

Adaptation, Psychological↗
PubMed2006

Telehealth and the national health information technology strategic framework.

Telehealth has a role in the federally sponsored plan for health information technology (HIT) that encompasses electronic health records (EHRs) and the National Health Information Network (NHIN). The goals of telehealth and the national plan are complementary. One focuses on improving access to high quality health-care services and the other on the information systems to support those services. Telehealth needs the fully realized EHR to provide the best possible care when patients are geographically and chronologically separated from their providers. Some current telehealth projects are natural examples of how a distributed, accessible EHR such as that envisaged by the plan can be used to provide better care. The experiences of telehealth in organizing large networks of heterogeneous health-care entities can provide useful lessons as the process of implementing HIT moves forward.

Delivery of Health Care, Integrated↗
PubMedDate not supplied

Tapping into hospital champions--strategic middle managers.

A social network analysis of eighty-nine midlevel health care professionals showed that middle managers' strategic knowledge is positively associated with championing alternative ideas and synthesizing new information for upper management. In addition, the relationship between knowledge and middle management strategic activities in informal networks is moderated by the manager's social position.

Catholicism↗
PubMed1994

The standards movement builds momentum.

The success of efforts to build health information networks and to implement computerized patient records will hinge on the development of standards for the electronic format and content of financial and clinical transactions. Without standards, sharing data among disparate systems will be extremely cumbersome, and drawing conclusions based on research will prove difficult. For years, several volunteer groups have been toiling to develop these standards. These efforts are beginning to pay off. This special report summarizes the latest trends in standards development. This series of stories includes an update on efforts to develop standard data sets for financial and administrative transactions; a guide to the jargon of health care electronic data interchange, an overview of efforts to speed the development of standards for computerized records; and a case study of a hospital implementing one set of clinical standards.

Clinical Medicine↗
PubMed2002

A review of CHIN initiatives: what works and why.

A Community Health Information Network (CHIN) can generate revenue through multiple avenues and maximize efficiency for participants, including multiple payers, physicians, hospitals, labs, pharmacies, and ancillary providers. This article reviews representative CHIN initiatives over the past decade and identifies key success factors, such as provider adoption and participation in planning, multiple-payer participation, providing key transactions, and incremental implementation.

Community Networks↗
PubMed2004

A vision for child health information systems: developing child health information systems to meet medical care and public health needs.

In both the medical care and public health arenas, a variety of information systems have been developed to serve providers and program managers. In general, these systems have not been designed to share information with other information systems and provide comprehensive information about a child's health status to the information user. A number of initiatives are underway to develop integrated information systems. In December 2003, All Kids Count hosted an invitational conference "Developing Child Health Information Systems to Meet Medical Care and Public Health Needs." Through a series of plenary presentations and breakout discussion groups, participants developed a series of recommendations about governance, economic issues, information infrastructure, and uses of information from integrated child health information systems (CHIS). Common threads in the recommendations were: (1) development of a national coalition of stakeholders to promote integration of separate child health information systems within the context of ongoing national initiatives such as the National Health Information Infrastructure and the Public Health Information Network, (2) the need to develop the business and policy cases for integrated CHIS, (3) the need to develop agreement on standards for collecting and transferring information, and (4) the need to get the word out about the importance of integrating separate CHIS to improve health and health services.

Child↗