Experimental study of the initial phase of atmospheric discharges

2011 ◽  
Author(s):  
A.V. Oginov ◽  
K.V. Shpakov ◽  
E.V. Oreshkin ◽  
S.A. Chaikovsky
Keyword(s):  
Experimental Study ◽  
Initial Phase ◽  
Atmospheric Discharges

Experimental study of the discharge glow structure in the initial phase of a nanosecond breakdown of an insulating gap

2005 ◽  
Vol 50 (7) ◽  
pp. 876-880 ◽  
Author(s):  
E. G. Danchenko ◽  
P. B. Repin ◽  
A. G. Rep’ev
Keyword(s):  
Experimental Study ◽  
Initial Phase ◽  
Insulating Gap

Catecholamine Infusion versus Intraaortic Counterpulsation at the Initial Phase of Left Intraventricular Balloon Pumping in the Fibrillating Animal Heart

1993 ◽  
Vol 16 (2) ◽  
pp. 86-90 ◽  
Author(s):  
S. Stamatelopoulos ◽  
N. Zakopoulos ◽  
N. Saridakis ◽  
S. Stefanou ◽  
A. Adractas ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Experimental Study ◽  
Left Atrial ◽  
Initial Phase ◽  
Aortic Pressure ◽  
Aortic Flow ◽  
Aortic Blood ◽  
Aortic Blood Pressure ◽  
The Mean ◽  
The Difference

This experimental study compares the effect of catecholamine infusion to the effect of intraaortic counterpulsation (IABP) while initiating intraventricular balloon pumping (IVBP) in the fibrillating heart. In 12 dogs IVBP started immediately after the induction of ventricular fibrillation. Intravenous adrenaline or noradrenaline (at a progressively increasing infusion rate until the systolic aortic blood pressure was 120 mm Hg) was interchanged with IABP. The systolic aortic pressure, the aotic flow and the mean left atrial pressure were, respectively, 120.4 ± 0.5 mm Hg, 42 ± 4 mlkg-1min-1 and 18.7 ± 1.2 mm Hg (x ± SEM) ten min after initiating catecholamine infusion and 97 ± 5 mm Hg (with a 131 ± 4 mm Hg diastolic wave), 69.6 ± 4 mlkg-1min-1 and 16 ± 1.5 mm Hg ten min after initiating IABP. The difference in aortic flow was significant (p<0.001). The results indicate that a better aortic flow may be obtained by combining IVBP and IABP than IVBP and vasoconstrictive agents in the fibrillating heart. If IVBP, IABP and catecholamines are combined, both AF and AP may increase.

Experimental Study of Energy Loss in Solar Energy Collectors With Wind Fences

2004 ◽  
Vol 126 (4) ◽  
pp. 1101-1104 ◽  
Author(s):  
Dalmo G. Gomes ◽  
Nide G. C. R. Fico,
Keyword(s):  
Experimental Study ◽  
Solar Energy ◽  
Energy Loss ◽  
Flat Plate ◽  
Flow Pattern ◽  
Solar Collector ◽  
Initial Phase ◽  
Separated Flow ◽  
Loss Reduction ◽  
Wind Barrier

This work presents a new way of minimize the losses on a flat plate solar energy collector. A wind barrier is added along the collector perimeter in order to modify the flow pattern over it. This barrier creates a region of recirculating separated flow on top of the collector. This is an initial phase of the work and only winds aligned with the solar collector are investigated. In other words no influence of lateral winds is accounted for. The first experimental results proved very encouraging. It was observed a 12% heat-loss reduction in comparison with the traditional double glazing solution.

Influence of the Covering Area of Major Connectors of Mandibular Dentures on the Accuracy of Speech Production: A Pilot Study

2019 ◽  
Vol 72 (6) ◽  
pp. 419-428
Author(s):  
Junichiro Wada ◽  
Masayuki Hideshima ◽  
Keiichiro Uchikura ◽  
Yuka Shichiri ◽  
Shusuke Inukai ◽  
...  
Keyword(s):  
Experimental Study ◽  
Speech Production ◽  
Initial Phase ◽  
Evaluation System ◽  
Speech Impairment ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Speech Evaluation ◽  
Quasi Experimental ◽  
Target Syllable

<b><i>Background/Objectives:</i></b> Speech impairment during the initial phase of removable partial denture (RPD) treatment can prevent patient adaptation to RPDs. This quasi-experimental study aimed to investigate the influence of the covering area of major connectors located in the mandibular anterior region on the accuracy of speech production. <b><i>Methods:</i></b> Fifteen adults (12 men and 3 women aged 26–40 years) with healthy dentition were recruited. Four target syllables were used for the assessments: [ʃi], [ʧi], [çi], and [ki]. There were four speaking conditions: without a connector (control), wearing lingual bar (5 mm width), wearing lingual plates (12 mm width), and wearing connectors covering the occlusal surface of lower dentition (16 mm width; CO). The accuracy of speech production was evaluated by mean appearance ratio of correct labels (MARC) and incorrect labels (MARIC) of the phonetic segments which were calculated with a speech evaluation system (VoiceAnalyzer). <b><i>Results:</i></b> The MARC in the 3 target syllables [ʃi], [ʧi], and [ki] significantly decreased with CO. For the target syllable [ʃi], the MARICs of [ʧi], [ʤi], and [çi] with CO were significantly lower than that in the control. For the target syllable [ʧi], the MARIC of [ki] with CO was significantly higher than that in the control. For the target syllable [çi], the MARIC of [gi] with CO was significantly higher than that in the control. <b><i>Conclusion:</i></b> RPDs with major connectors covering the lower dentition could disturb speech production during the initial phase of RPD treatment. Prosthodontic treatment with such RPD designs requires further consideration regarding the information given to patients before starting the treatment.

scholarly journals Recommender System for Nutrient Management Based on Precision Agriculture

2019 ◽  
Vol 8 (4) ◽  
pp. 227-235
Keyword(s):  
Experimental Study ◽  
Recommender System ◽  
Precision Agriculture ◽  
Initial Phase ◽  
Nutrient Management ◽  
Growth Parameters ◽  
Research Work ◽  
The Impact ◽  
Collection Phase ◽  
Major Domain

Agriculture is the heart of our nation and society. It is influenced by several factors and parameters such as uneven monsoon, changing climate as well as weather circumstances, rainfall and nutrient facts during the harvest. Agriculture is primarily crucial and also the main source of our livelihood. But, owed to the scarceness of nutrients in plants, the human is strained to handle many dare in everyday life. The restoration of the nutrient is essential, in this view there is need to adopt precision agriculture system which change crop related plans and regulations, whereas nutrient management is a major domain that is needed to be spotlight in the field of farming techniques. The main aim of this research is to create an idea of developing a precision based recommender system for nutrient management and the main scope of this paper to describe the initial phase of the research. The experimental study of this research work is conducted using a terrace garden. The nutrient management with respect to the horticulture crop tomato is considered as the objective. The samples are grouped as two sets namely A and B representing samples without using natural fertilizers/manures and with natural fertilizers/manures. The growth parameters are analyzed and the results are presented. The data collection phase using sensors and Arduino kit is described here. The impact of pests and the remedy taken during the period of growth is recorded. The advices from the experts given in the soil tests are considered for preparing this nutrient management system.

scholarly journals A Change Would Do You Good .... An Experimental Study on How to Overcome Coordination Failure in Organizations

2006 ◽  
Vol 96 (3) ◽  
pp. 669-693 ◽  
Author(s):  
Jordi Brandts ◽  
David J Cooper
Keyword(s):  
Experimental Study ◽  
Financial Incentives ◽  
Initial Phase ◽  
Laboratory Experiments ◽  
Coordination Failure ◽  
Effort Level ◽  
History Of ◽  
High Effort

We study how financial incentives can be used to overcome a history of coordination failure using controlled laboratory experiments. Subjects' payoffs depend on coordinating at high effort levels. In an initial phase, the benefits of coordination are low, and play typically converges to an inefficient outcome. We then explore varying financial incentives to coordinate at a higher effort level. An increase in the benefits of coordination leads to improved coordination, but large increases have no more impact than small increases. Once subjects have coordinated on a higher effort level, reductions in the incentives to coordinate have little effect on behavior.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study
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