{"title":"Telemetered renal responses in dogs during detection of explosives.","authors":"R D Rader, C M Stevens","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The primary objectove of this work was to develop and test a method of measuring and characterizing renal hemodynamic responses in unrestrained dogs. Recordings of left kidney blood flow and abdominal aortic pressure were obtained from unrestrained dogs through the use of a two-channel implanted telemetry system during episodes of search and detection of simulated explosives. In each of a number of sequences, the dog was first given a start signal, and after locating the hidden device, was rewarded with food. Data were assessed at the start, find, and recovery segments. The dynamic flow and pressure, together with a hydraulic renal model, were used to derive the total preglomerular and postglomerular vascular resistances and the mean level of glomerular hydrostatic pressure. Data from three dogs obtained by telemetry and analyzed through the use of the model have shown that compared to the start of the test, the location of hidden explosives results in a decrease in both the level of mean aortic blood pressure and the preglomerular resistance; whereas, the reward results in an elevation of mean blood pressure and preglomerular resistance. The postglomerular resistance varied less than the preglomerular resistance, and mean flow did not vary significantly. This work has shown that the stimulation of a reward and the successful performance of a task lead to significant renal responses in dogs. It has further shown that telemetry, when employed with improved data analysis techniques, permits renal hemodynamics to be assessed in unrestrained animal subjects.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 5","pages":"265-75"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12411559","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Calibration and measurement in 3-dimensional monitoring of human motion by optoelectronic means. I. Preliminaries and theoretical aspects.","authors":"H J Woltring","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>By combinding the obervations from a number of independent direction sensors, the spatial positions of one or more targets may be reconstructed. The theory of calibration and measurement in a computerized, interactive environment is discussed in the terminology of analytical photogrammetry, for applications in the field of biomechanics. The discussion is focussed upon optoelectronic system for movement monitoring in real-time rather than upon photography as is the conventional photogrammetric implementation.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 3-4","pages":"169-96"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12411555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The properties of bird feathers as converse piezoelectric transducers and as receptors of microwave radiation. II. Bird feathers as dielectric receptors of microwave radiation.","authors":"J Bigu-del-Blanco, C Romero-Sierra","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The characteristics of bird feathers as receptors of microwave fields were investigated in the 10- to 16-GHz region. Experiments were conducted coupling the specimen (feather) to a length of waveguide which served, together with other microwave components, as a primary detector. Microwave power radiation patterns were measured both in the presence and in the absence of the specimen. Results indicated a substantial increase in the microwave power collected in the forward direction and a decrease of the radiation pattern beam width when the feather was present. Fruthermore, some experiemental evidence indicated the possibility of inducing piezoelectric effects in the specimen by audiofrequency pulse-modulated microwave fields. These results are important in view of (i) the fundamental role that feathers play in the life of birds and (ii) the influence of environmental factors on bird behaviour.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 6","pages":"354-64"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12416966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Fluid input control in burned patients with the aid of ultrasonic arterial blood pressure monitoring.","authors":"V Banssillon, J Latarjet","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Arterial blood pressure is nowadays easily and reliably measured with ultrasonic equipment. It correlates well with blood volume, and may therefore be used to guide fluid infusion in burned patients. Monitoring of blood pressure, instead of application of old-fashioned recipes, helps to avoid dangerous situations of hypovolemia or overload.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 6","pages":"365-7"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12410481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Criteria of quality and methods of measurement in multichannel biotelemetry.","authors":"H Kaltschmidt","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In contrast with one-channel biotelemetry, multichannel biotelemetry systems permit the analysis of biological systems by means of cybernetics. Some simple examples are given. The basic concept of a multichannel system is described. The criteria of quality of which the nonevident ones are defined by detailing the test circuits are the following (input criteria): number of channels, bandwidth, voltage range, impedance, maximum voltage outside the signal band, stability of the power supply for transducers, factor of safety against multipath propagation, distance between transmitter and receiver, shock, vibration and temperature range, weight, volume and operating time. Output criteria: signal-to-noise ratio, linearity, crosstalk transfer function, different time lags.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 3-4","pages":"197-206"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12411556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Computer signal processing of long duration biotelemetric brain data.","authors":"T J Willey, F Roos, G M Hunt","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The EEG represents brain processing under diverse physiological conditions. A complete system involving acquisition and quantitation of this important information about brain function is described. The time-domain EEG and other biological signals are obtained using a multichannel PAM/FM biotelemeter mounted on the head of the experimental animal. This data is transmitted, demodulated and recorded by electronic recording techniques. A computer-based EEG analysis system is described for acquiring the primary data and transforming it into the frequency domain using Fourier methods. The computing system is developed to semi-automatically signal process about 4 h of eight channel EEG records. Data compression by plotting in a quasi-three-dimensional spectral profile allows visual correlations of pattern features to drug manipulations, etc. The software programs are briefly described for each step in signal processing. The feasibility of the complete system approach is demonstrated using biotelemetry to acquire low voltage EEG signals without behavioral distortions or introduction of artifacts by cables.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 6","pages":"329-40"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12014580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Pulse code modulation telemetry in ski injury research. II. Preliminary results.","authors":"M L Hull, C D Mote","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The excitation between the boot and the ski was measured in maneuvers skied over a variety of snow conditions. A precision pulse-code modulation (PCM) - frequency modulation (FM) telemetry system was custom built to transmit data from strain-gage force transducers mounted inside the test ski to a receiving station about 3 km distant. Field tests gathered cruising data from three basic maneuvers - snowplow, stem christiana, and parallel christiana. Some classic falls resulting from inadvertent release of the ski bindings were also recorded. For comparative purposes, the maneuvers were skied over a standard five-turn slalom course. Examination of the loading histories reveals that: (1) the data are nonstationary random; (2) boot compression for the test binding system exceeds 500 N and is caused by ski flexure; (3) an 80 Hz resonance of the particular toe binding mechanism is excited; (4) combined impulsive loading is significant; (5) the loading is related to the maneuver type; (6) bending components during forward falls exceed the tibia flexural strength even though heel binding release occurs at the laboratory setting, and (7) torsion and bending components exceed tibia fracture levels during elementary ski maneuvers.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 5","pages":"276-76"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12410331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The properties of bird feathers as converse piezoelectric transducers and as receptors of microwave radiation. I. Bird feathers as converse piezoelectric transducers.","authors":"J Bigu-del-Blanco, C Romero-Sierra","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>An investigation was made of the properties of bird feathers as piezoelectric transducers in the audiofrequency range and as dielectric receptors of electromagnetic radiation in the microwave region. In the first case, cartridges of the ceramic and magnetic type and an electromagnetic transducer probe were used as detecting devices. Results show piezoelectric resonances in the 1 to 20-kHz region for the calami of feathers.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 6","pages":"341-53"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12410480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R J McPartland, D J Kupfer, F G Foster, K L Reisler, G Matthews
{"title":"Objective measurement of human motor activity: a preliminary normative study.","authors":"R J McPartland, D J Kupfer, F G Foster, K L Reisler, G Matthews","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Motor activity values have been generated for a population of young adult subjects in order to develop normative values for motor activity levels. Using the large-scale-integrated (LSI) motor activity monitor, day and night motor activity have been continuously and noninvasively monitored for approximately 1 month on 13 normal subjects. Comparisons between measured and self-rated motor activity tend to validate this technique. The results are discussed in relation to ongoing motor activity studies showing definite changes in activity associated with fluctuations in mood and anxiety.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 6","pages":"317-23"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12410478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The problem of skin-electrode processes during medical electrography.","authors":"L Tatarenko","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The processes were studied which take place at the skin-electrode zone when surface electrodes are applied to the human body for the medical electrography (ECG, EEG, EMG, etc.). These processes were investigated from the point of view of their influence on the distortion-resistence and the precision of the biopotential registration; they were studied also as a possible source of bioinformation. The results of the experimental research are discussed.</p>","PeriodicalId":75602,"journal":{"name":"Biotelemetry","volume":"2 6","pages":"324-8"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12410479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}