Observations of Experimental Research on Oscillating Linear Drives for Small Piston Compressors

1989 ◽  
Vol 203 (4) ◽  
pp. 217-228 ◽  
Author(s):  
O Roubicek ◽  
Z Pejsek ◽  
J Rozprim
Keyword(s):  
Experimental Research ◽  
Automatic Regulation ◽  
Electronic Control ◽  
Flow Volume ◽  
Electric Drives ◽  
Output Pressure ◽  
Linear Motors ◽  
Air Compressors ◽  
Methods Of Measurement

Electric drives provided with an oscillating reluctance or synchronous linear motor and intended to be used in small piston compressors are inherently electromechanical systems. Exclusively electronic control of the drives, based upon special inductance or capacitive methods of measurement of the clearance volume of the driven compressor, enables automatic regulation of the clearance volume to reach the required nominal value or its control, depending upon superior automatic regulation of the output pressure difference, of flow volume (in air compressors) or of the reference temperature of the cooled place (in refrigerating compressors) to the required value. The long-term experimental investigation of research prototypes with the compressors with both types of finely tuned block mechanisms of linear motors of both types enables present-day knowledge to be presented concerning the behaviour and operating and advantageous properties of the developed systems. This experimental research confirmed the favourable influence of the simplified design of the compressors and of electronic control upon the improvement and new possibilities in the construction and also in the application of the compressors.

Dilatation of Vascular Prostheses in Ascending Aortic Position: A Long-Term Follow-Up Computed Tomography Study with Comparison of Different Measurement Methods

2016 ◽  
Vol 66 (03) ◽  
pp. 206-214
Author(s):  
Matthias Endlich ◽  
Christian Krämer ◽  
Chris Probst ◽  
Armin Welz ◽  
Kai Wilhelm ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Measurement Methods ◽  
Point Of View ◽  
Cross Sectional ◽  
Vascular Prostheses ◽  
Aortic Replacement ◽  
Ascending Aortic Replacement ◽  
Long Term Follow Up ◽  
Methods Of Measurement

Background The aim of this study was to evaluate long-term dilatation of Hemashield Gold and Hemashield Platinum vascular prostheses in ascending aortic position using different measurement methods to obtain precise results. Methods Between 1999 and 2007, 73 patients with Stanford type A dissection received ascending aortic replacement with Hemashield Gold and Hemashield Platinum prostheses. Measurements were performed using multiplanar reconstruction mode of electrocardiogram (ECG)-gated, multislice spiral computed tomography (MSCT) in strictly orthogonal cross-sectional planes. Different methods of measurement were compared and maximum dilatation was estimated for different time spans. Results Diameters calculated from the measured circumference showed a significant (p = 0.037) but clinically not relevant difference (0.1 mm) to the mean between the largest and the shortest cross-sectional diameter of the prosthesis. Dilatation after 24.2 ± 10.2 months was 8.5 ± 4.5%. Long-term dilatation after 91.8 ± 34 months amounted to 11.8 ± 4.2%. Conclusion Based on ECG-gated MSCT images, the presented methods of measurement provided reliable results. Long-term analysis shows low dilatation rates for Hemashield prostheses, which therefore can be considered as safe from this point of view. Nevertheless, a maximal dilatation of 20% could be relevant in valve sparing root replacement. It remains unclear if a dilatation like this contributes to the formation of suture aneurysms.

scholarly journals Intention, Principle, Outputs and Aims of the Experimental Pavilion Research of Building Envelopes Including Windows for Wooden Buildings

2017 ◽  
Vol 13 (1) ◽  
pp. 42-51 ◽  
Author(s):  
Daniela Štaffenová ◽  
Ján Rybárik ◽  
Miroslav Jakubčík
Keyword(s):  
Experimental Research ◽  
Climatic Conditions ◽  
Point Of View ◽  
Physical Parameters ◽  
Data Sets ◽  
Data Set ◽  
Building Envelopes ◽  
Climate Conditions ◽  
Time Period

AbstractThe aim of experimental research in the area of exterior walls and windows suitable for wooden buildings was to build special pavilion laboratories. These laboratories are ideally isolated from the surrounding environment, airtight and controlled by the constant internal climate. The principle of experimental research is measuring and recording of required physical parameters (e.g. temperature or relative humidity). This is done in layers of experimental fragment sections in the direction from exterior to interior, as well as in critical places by stable interior and real exterior climatic conditions. The outputs are evaluations of experimental structures behaviour during the specified time period, possibly during the whole year by stable interior and real exterior boundary conditions. The main aim of this experimental research is processing of long-term measurements of experimental structures and the subsequent analysis. The next part of the research consists of collecting measurements obtained with assistance of the experimental detached weather station, analysis, evaluation for later setting up of reference data set for the research locality, from the point of view of its comparison to the data sets from Slovak Hydrometeorological Institute (SHMU) and to localities with similar climate conditions. Later on, the data sets could lead to recommendations for design of wooden buildings.

Evaluating Graph Drawing Aesthetics

2011 ◽  
pp. 145-179 ◽  
Author(s):  
Helen C. Purchase
Keyword(s):  
Experimental Research ◽  
Computational Efficiency ◽  
Graph Drawing ◽  
Design Principles ◽  
Research Area ◽  
Graph Layout ◽  
Future Work

This chapter describes a long-term project that investigates the validity of the design principles — not from the perspective of computational efficiency, but from the perspective of human comprehension — upon which many automatic graph layout algorithms are based. It describes a framework for experimentation in this area, the overall methodology used throughout, as well as the details of the experiments themselves. It shows the development of the empirical ideas and methods as the project matured and provides reflections on each experiment, demonstrating the difficulty of initiating a new experimental research area. The chapter suggests how the current results should best be interpreted, as well as ideas for future work in this area.

scholarly journals Jealousy Incarnate: Quiet Ego, Competitive Desire, and the Fictional Intelligence of Long-Term Mating in a Romantic K-Drama

2020 ◽  
Vol 10 (9) ◽  
pp. 134
Author(s):  
Lorenza Lucchi Basili ◽  
Pier Luigi Sacco
Keyword(s):  
Social Cognition ◽  
Experimental Research ◽  
Theoretical Approach ◽  
Male Partner ◽  
Quiet Ego ◽  
The One ◽  
Mating Interaction ◽  
Human Mating

In this paper, we analyze a K-drama aired by the Korean TV network SBS in 2016, Jealousy Incarnate, as a case study of the application of the Tie-Up Theory to a romantic narrative as a form of simulation of human mating processes with social cognition valence. We find that this case provides us with an example of a mating process where the choice of the male partner by the female lead character does not privilege the one that should be preferable on the basis of the standard prediction of the experimental research on human mating. This discrepancy is a signal of a basic limitation of experimental research, that highlights the subjects’ preferences for abstract potential partners but is not able to fully account for the mechanisms that lead to the choice of a specific partner in a specific mating interaction. We argue that the narrative simulation viewpoint provides insights that are complementary to those of experimental research, and that a more comprehensive theoretical approach, such as the one offered by the Tie-Up Theory, may be helpful to account for both perspectives.

EXPERIMENTAL TESTS OF H2S INTERACTIONS WITH AQUIFER ROCK

2016 ◽  
pp. 0-0
Author(s):  
Krzysztof LABUS ◽  
Katarzyna SUCHODOLSKA
Keyword(s):  
Experimental Research ◽  
Hydrogen Sulphide ◽  
Microscopic Analysis ◽  
Experimental Tests ◽  
Main Process ◽  
Sulphide Mineral ◽  
Geological Sequestration ◽  
Mineral Trapping ◽  
Małopolska Block

The experimental research in brine–rock–gas was performed in order to investigate the interactions of hydrogen sulphide with selected aquifer rocks from the Małopolska Block (Poland). Scanning microscopic analysis of reacted samples confirmed intense dissolution of the cement components (mainly hematite and carbonates). It was also found that the main process leading to hydrogen sulphide mineral trapping is its reaction with hematite, leading to the formation of iron (III) sulphide. Based on modeling of kinetic reactions we also assessed the amounts of sulphur blocked in the mineral form and in solution. On this basis, it was hypothesized that the analyzed rocks have significant potential for geological sequestration of H2S in the long term.

Triangular Prism and Slit Electrode Pair for ECF Jetting Fabricated by Thick Micromold and Electroforming as Micro Hydraulic Pressure Source for Soft Microrobots

2016 ◽  
Vol 10 (4) ◽  
pp. 470-478 ◽  
Author(s):  
Joon-Wan Kim ◽  
◽  
Thanh V. X. Nguyen ◽  
Kazuya Edamura ◽  
Shinichi Yokota ◽  
...  
Keyword(s):  
Fabrication Process ◽  
Dielectric Fluid ◽  
Electrode Pair ◽  
Hydraulic Pressure ◽  
Triangular Prism ◽  
Maximum Output ◽  
Output Pressure ◽  
Mems Fabrication ◽  
Micromechanical Systems ◽  
Air Compressors

In this paper, we propose a triangular prism and slit electrode pair (TPSE) and its micromechanical systems (MEMS) fabrication process for a novel micropump using electro-conjugate fluid (ECF), which is based on a thick photoresist (KMPR) micromold (≥ 500 μm) and nickel electroforming. ECF is a kind of functional and dielectric fluid. The strong and active jet flow of an ECF is generated between two electrodes surrounded by the ECF when a high direct-current voltage is applied to the electrode pair. The micropumps generated by the ECF jetting can be used as micro hydraulic pressure sources for soft microrobots. By substituting these ECF micropumps for bulky air compressors or hydraulic pumps utilized in soft robots, we can realize advanced soft microrobots in which the driving sources are embedded. An MEMS-based TPSE for an ECF micropump was successfully fabricated by using the proposed MEMS fabrication process. The maximum output pressure without a flow and the flow rate without a load were 24.6 kPa and 27.5 mm3/s, respectively, at an applied voltage of 2 kV. The experimental results show that the MEMS-fabricated TPSE is a good candidate for electrode-type ECF micropumps utilized in various applications of soft microrobots whose pressure sources are embedded inside.

PedElEc: Towards a Better Understanding of Ageing Processes of E-Bike Batteries

2016 ◽  
Vol 848 ◽  
pp. 119-122 ◽  
Author(s):  
Sven Bayer ◽  
Vitaliy Schreibmann ◽  
Ansgar Ackva ◽  
Arndt Balzer ◽  
Peter Braun
Keyword(s):  
Life Time ◽  
Rechargeable Batteries ◽  
Usage Pattern ◽  
Ongoing Research ◽  
Electric Drives ◽  
Battery Capacity ◽  
Ageing Processes ◽  
Long Term Consequences ◽  
And Performance

It becomes more and more popular to use electric drives using rechargeable batteries as a replacement of traditional gas engines in vehicles and tools, or as a new assistive feature in e-bikes. Due to the high cost of batteries, industry and users demand better understanding of proper usage pattern of these batteries in terms of discharging/charging cycles in order to extend batteries’ life-time. In the ongoing research project PedElEc we work towards a better understanding of the ageing processes of e-bike batteries by observing groups of users applying different usage pattern. By doing so, we learn about long-term consequences of different usage pattern and compare them with regard to battery capacity and performance. In the end, we hope to be able to give valid recommendations on how to handle batteries in e-bikes with regard to discharging-charging cycles, acceptable storage of batteries, and preferable load.

About Smocks and Jocks

1979 ◽  
Vol 1 (2) ◽  
pp. 94-99 ◽  
Author(s):  
Rainer Martens
Keyword(s):  
Social Psychology ◽  
Sport Psychology ◽  
Experimental Research ◽  
Field Research ◽  
Partial Solution ◽  
New Paradigm ◽  
Scientific Paradigm ◽  
Term Field

The dissatisfaction with the existing scientific paradigm of social psychology, and its adoption in sport psychology, is discussed. Although many metapsychological issues are raised, attention focuses on the inadequacies of laboratory experimental research. As a partial solution in the development of a new paradigm, it is suggested that sport psychologists trade their smocks for “jocks,” turning their efforts to multivariate, long-term field research.

Experimental Research on the Durability of Inorganic Binder Stabilized Material with Soda Residue

2014 ◽  
Vol 629-630 ◽  
pp. 189-194 ◽  
Author(s):  
Yi Bo Yang ◽  
Mei Ru Zheng ◽  
Wen Ying Guo ◽  
Heng Chang Wang
Keyword(s):  
Silica Fume ◽  
Experimental Research ◽  
Frost Resistance ◽  
Chloride Ion ◽  
Mineral Admixture ◽  
Urgent Problem ◽  
Inorganic Binder ◽  
Cold Area ◽  
Negative Effect

The high contents of alkali ion and chloride ion in soda residue pollute environment. So how to treat the soda residue is an urgent problem to be solved in China. The soda residue can be used in inorganic binder stabilized materials. But the negative effect of soda residue is not studied. The impermeability, frost resistance, and chloride ion leaching of inorganic binder stabilize materials prepared by soda residue are studied. And the results as followings: (1) The permeability coefficients of cement/ mineral admixture-soda residue stabilized stone chip are very low, and they are good impermeable materials; (2) The frost resistance of cement-silica fume-soda residue stabilized stone chip is good, and silica fume is recommended to be used in cold area; (3) The mineral admixture has a better long-term immobilized effect on chloride ion than cement, and the ground granular blast-furnance slag is the best mineral admixture to immobilize the chloride ion.

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