Computer Measurement System Research Articles

The morphometrical and topographical evaluation of the superior gluteal nerve in the prenatal period.

Advances in medical science are helping to break down the barriers to surgery. In the near future, neonatal or in utero operations will become the standard for the treatment of defects in the human motor system. In order to carry out such procedures properly, detailed knowledge of fetal anatomy is necessary. It must be presented in an attractive way not only for anatomists but also for potential clinicians who will use this knowledge in contact with young patients. This work responds to this demand and presents the anatomy of the superior gluteal nerve in human fetuses in an innovative way. The aim of this work is to determine the topography and morphometry of the superior gluteal nerve in the prenatal period. We chose the superior gluteal nerve as the object of our study because of its clinical significance-for the practice of planning and carrying out hip surgery and when performing intramuscular injections. The study was carried out on 40 human fetuses (20 females and 20 males) aged from 15 to 29 weeks (total body length v-pl from 130 to 345 mm). Following methods were used: anthropological, preparatory, image acquisition with a digital camera, computer measurement system Scion for Windows 4.0.3.2 Alpha and Image J (accuracy up to 0.01 mm without damaging the unique fetal material) and statistical methods. The superior gluteal nerve innervates three physiologically significant muscles of the lower limb's girdle: gluteus medius muscle, gluteus minimus muscle and tensor fasciae latae muscle. In this study the width of the main trunk of the nerve supplying each of these three muscles was measured and the position of the nerve after leaving the suprapiriform foramen was observed. A unique typology of the distribution of branches of the examined nerve has been created. The bushy and tree forms were distinguished. There was no correlation between the occurrence of tree and bushy forms with the body side (p > 0.05), but it was shown that the frequency of the occurrence of the bushy form in male fetuses is significantly higher than in female fetuses (p < 0.01). Proportional and symmetrical nerve growth dynamics were confirmed and no statistically significant sexual dimorphism was demonstrated (p > 0.05). The anatomy of the superior gluteal nerve during prenatal period has been determined. We have identified two morphological forms of it. We have observed no differences between right and left superior gluteal nerve and no sexual dimorphism. The demonstrated high variability of terminal branches of the examined nerve indicates the risk of neurological complications in the case of too deep intramuscular injections and limits the range of potential surgical interventions in the gluteal region. The above research may be of practical importance, for example for hip surgery.

The 8AE-PD computer measurement system for registration and analysis of acoustic emission signals generated by partial discharges in oil power transformers

The 8AE-PD computer measurement system for registration and analysis of acoustic emission signals generated by partial discharges in oil power transformers

Research of influence of temperature and mechanical stresses on magnetoelastic characteristics of structural steel cores

The research results of the effect of temperature and tensile stresses on the magnetic properties of structural steel 13CrMo4-5 were presented in the paper. Before the measurements, the cores of the test material were subjected to the step-cooling test, simulating the influence of the time flow and environmental conditions on the material. For the tests, three cores, each differing by the step-cooling test process duration were used. The paper also describes the step-cooling test process. Management of computer measurement system, designed specifically for research was described. Measurements results, which indicate that the temperature has little effect on the magnetic properties of the material under investigation were presented. However, a significant effect of tensile stress on the magnetic characteristics of the material, which indicates the possibility of using magnetoelastic phenomenon when studying non-destructive testing of structural steels was revealed.

Application of the OPC Technology in the No-Load Test Platform of the Metro Bogie

The generation of the OPC technology makes each data source communicate flexibly in the industrial control environment. This paper takes the no-load test platform of the metro bogie as an example to design a lower and upper computer measurement and control system which is consist of IPC and PLC by the OPC technology. The OPC client is developed based on the platform of Visual Basic. By using the different communication mode, it is realized to access the OPC server data.

Pulsed electric stimulation as a method for assessing the quality of biological objects

By using new computer measurement system that allows you to create conditions for reversible depolarization of cell membranes, we investigated the correlation instantly values active and capacitive components with quality indicators of muscle tissue. Electrical test of objects is represented as a large array of data. Found that individual features of the muscle tissue, depending on the species, are impact on the array. When subsequently his compared with a unique array of references, it becomes possible to express and reliable assessment of the type of muscle tissue.

Contextual and Cued Fear Conditioning Test Using a Video Analyzing System in Mice

The contextual and cued fear conditioning test is one of the behavioral tests that assesses the ability of mice to learn and remember an association between environmental cues and aversive experiences. In this test, mice are placed into a conditioning chamber and are given parings of a conditioned stimulus (an auditory cue) and an aversive unconditioned stimulus (an electric footshock). After a delay time, the mice are exposed to the same conditioning chamber and a differently shaped chamber with presentation of the auditory cue. Freezing behavior during the test is measured as an index of fear memory. To analyze the behavior automatically, we have developed a video analyzing system using the ImageFZ application software program, which is available as a free download at http://www.mouse-phenotype.org/. Here, to show the details of our protocol, we demonstrate our procedure for the contextual and cued fear conditioning test in C57BL/6J mice using the ImageFZ system. In addition, we validated our protocol and the video analyzing system performance by comparing freezing time measured by the ImageFZ system or a photobeam-based computer measurement system with that scored by a human observer. As shown in our representative results, the data obtained by ImageFZ were similar to those analyzed by a human observer, indicating that the behavioral analysis using the ImageFZ system is highly reliable. The present movie article provides detailed information regarding the test procedures and will promote understanding of the experimental situation.

Contextual and Cued Fear Conditioning Test Using a Video Analyzing System in Mice

The contextual and cued fear conditioning test is one of the behavioral tests that assesses the ability of mice to learn and remember an association between environmental cues and aversive experiences. In this test, mice are placed into a conditioning chamber and are given parings of a conditioned stimulus (an auditory cue) and an aversive unconditioned stimulus (an electric footshock). After a delay time, the mice are exposed to the same conditioning chamber and a differently shaped chamber with presentation of the auditory cue. Freezing behavior during the test is measured as an index of fear memory. To analyze the behavior automatically, we have developed a video analyzing system using the ImageFZ application software program, which is available as a free download at http://www.mouse-phenotype.org/. Here, to show the details of our protocol, we demonstrate our procedure for the contextual and cued fear conditioning test in C57BL/6J mice using the ImageFZ system. In addition, we validated our protocol and the video analyzing system performance by comparing freezing time measured by the ImageFZ system or a photobeam-based computer measurement system with that scored by a human observer. As shown in our representative results, the data obtained by ImageFZ were similar to those analyzed by a human observer, indicating that the behavioral analysis using the ImageFZ system is highly reliable. The present movie article provides detailed information regarding the test procedures and will promote understanding of the experimental situation.

Research on the Inlet Pressure Accurate Control Method of the Nozzle for the Single-Jet Nozzle Tester of Aero Engine

This paper introduces the closed loop pressure computer control system which is suitable for the environment of kerosene medium. The system can satisfy the technical requirements of the pressure regulation in the test of the single –jet nozzle of aero engine , the pressure can be accurately controlled and its control precision is within ±0.01MPa. It indicates the principle and composition of the hydraulic system and computer measurement and control system. The paper introduces the design method and treatment process of the key technology, which includes the use of a proportional relief valve and a fixed throttle hole in hydraulic system, the use of PID control in closed loop control system, the use of high precision sensor and measurement method by grade in measuring system and the use of 24V precision steady voltage source. In the same time it indicates the actual application of the closed loop pressure control system.

Design of Computer Measurement and Control System for Electro-Hydraulic Stepping Cylinder

To meet the requirements of measurement and control system for common servo-cylinder and considering the characteristics of electro-hydraulic stepping cylinder, a computer measurement and control system is designed. In this paper, the working principle of hydraulic system, the structure of electrical system, the process of measurements and the functions of testing software based on LabVIEW are introduced.

The experimental setup for studying the molecular composition of nanoscale films and coatings

It is offered the method of measurement and design of the experimental setup, allowing to control the flow of particles from the surface of organic films during annealing by pulsed laser radiation. The method is based on the TOF(Time Of Flight) principle of detecting particles, desorbed from the surface by laser pulses, used for annealing. The principle of registration and the structure (block- scheme) of the experimental setup and its constituent parts are detailed in the work The setup consists of the analytical part, the system of laser irradiation and computer measurement system. The basis of the analytical part of the installation is a TOF(Time Of Flight) mass spectrometer of original construction.

Development of Computer Measurement System in Field Test (Part 1)

Development of Computer Measurement System in Field Test (Part 1)

Reproducibility of resting heart rate variability with short sampling periods.

The purpose of this study was to determine whether resting heart rate variability (HRV) is reproducible with short sampling measurement periods using an office-based personal computer measurement system. Eight healthy active women participated in ECG analyses on 2 days within 1 week under controlled environmental and physiological conditions. After they rested for 10 minutes, a 10-min ECG was recorded. HRV was determined from a 2.5- and 5-min sample period using both time domain variables (meanRR and SDNN) and frequency domain variables (LF, HF, LF:HF). Repeated measures ANOVA found no significant differences between Day 1 and Day 2 for either sampling period (p > or = 0.23). For both the 2.5- and 5-min sampling periods, the intraclass correlations between days for the time domain variables showed good reproducibility (R = 0.86-0.90). The reproducibility of the frequency domain variable was only average (R = 0.67-0.96), with the LF:HF ratio yielding the higher R values.

Development of Computer Measurement System in Field Test (Part 4)

Development of Computer Measurement System in Field Test (Part 4)

Development of Computer Measurement System in Field Test (Part 3)

Development of Computer Measurement System in Field Test (Part 3)

Development of Computer Measurement System in Field Test (Part 2)

Development of Computer Measurement System in Field Test (Part 2)

A Computer-Measurement System for Guidance

The role of testing in public school guidance programs is examined. The author suggests better use of new techniques to aid counselors. The computer, multivariate analysis of test scores, and the results of longitudinal studies are considered in detail.