Sequential Data Files Research Articles

TRITON software package: Analyzing large passive acoustic monitoring data sets using MATLAB.

As consumer electronic technology continues to advance with lower power, higher speed, larger data capacity, and lower costs, the ability to collect large acoustic data sets becomes more practical. However, working with these large data sets can be challenging and requires different approaches to managing and analyzing the data than traditionally have been used with small data sets. TRITON is a software package developed for working with long-term, wide-band, multi-terabyte, acoustic data sets. One of TRITON’s primary functions is to make long-term spectrograms from a large group of small (1 Gbyte) sequential data files. These long-term spectral averages provide a means of quickly evaluating long durations (hours) of wide-band data for sounds such as animal calling bouts and permit the user to zoom in to traditional spectral/time domain displays for finer scale analysis. TRITON has a graphical user interface and is based in MATLAB, which allows for easy modifications for specific data processing and analysis requirements. Examples of this are whistle and echolocation click detectors developed as TRITON extensions.

ActSds and OdfSds: Programs for converting INTERACT and The Observer data files into SDIS timed-event sequential data files

In this article, we describe programs for converting Mangold International's INTERACT and Noldus Information Technology's The Observer data files to sequential data interchange standard (SDIS) timed-event sequential data files. Users who convert their INTERACT or The Observer data files can then take advantage of various flexible and powerful data modification and computational procedures available in the Generalized Sequential Querier, a program that assumes SDIS-formatted files.

Fluxplus, a microcomputer program for interactive calculation of ‘in vitro’ solute fluxes, uptakes and accumulations in studies of intestinal transport

A new microcomputer program for interactive comparisons, analysis and calculation of in vitro solute transepithelial fluxes and nutrient uptakes and accumulations by intestinal tissues is described. The program is written in Microsoft GWBASIC for the widely distributed IBM-PC. Flux, uptake and accumulation values are obtained by computation from initial sequential data files and stored in sequential or random-organized files, depending on the specific process. Computed unidirectional fluxes are saved together with their associate electrical variables. The program calculates univariate statistics for unidirectional and net fluxes, and allows comparisons between selected groups of experiments by using the Student's t-test. An homocedasticity test is also provided. Active uptake or accumulations of solutes are calculated by substracting the predicted diffusive values at a determined concentration to total uptake or accumulation and from this, kinetic parameters are computed. The program was designed to be user-friendly and includes several functions to permit the user to manage and examine stored data. Examples of outputs illustrate applications of the program.

DDA — a data definition facility for unix using awk

AbstractWe discuss how the Awk language is an effective tool for interrogating sequential data files whose records consist of characters grouped into fields. This facility is used to implement a system to manage an ‘address book’ database. We then generalize the design, describing a system which allows one to interactively specify a DBMS according to one's own requirements within our general framework. We choose a wine‐tasting DBMS as an example specification for further consideration and evaluation.

A review of OSIRIS IV

The Survey Research Center at the University of Michigan's Institute for Social Research has begun the dissemination of OSIRIS IV, the latest version in Michigan's series of statistical systems. OSIRIS IV is designed to be an eventual replacement for the OSIRIS III system. OSIRIS has long been the ugly duckling of statistical systems. Data analysts find its six volumes of documentation forbidding and unintelligible, and dislike the cross-tabulation program's control syntax and lack of category labels. As a result, most data managers have remained unaware of OSIRIS III's unequalled power at managing sequential data files.