Recent Advances in Sensing and Control of Flexible Structures Via Piezoelectric Materials Technology

1999 ◽  
Vol 52 (1) ◽  
pp. 1-16 ◽  
Author(s):  
M. Sunar ◽  
S. S. Rao
Keyword(s):  
Experimental Research ◽  
Piezoelectric Materials ◽  
Flexible Structures ◽  
Survey Article ◽  
Research Activities ◽  
Intelligent Structures ◽  
History Of ◽  
Important Field ◽  
Distributed Behavior ◽  
And Control

Due to their special characteristics, piezoelectric materials can be used in distributed behavior sensing and control of flexible structures. These materials are usually incorporated with the precision sensing and control of highly adaptive intelligent structures. Many theoretical, numerical, and experimental research activities treating piezoelectricity in sensing and control of various flexible structures have been carried out over the last decade. This survey article aims at collecting the recent research studies in this important field. It contains 336 references which are classified according to their applications. A brief theory and history of piezoelectricity is also presented.

Feedback theory to the well-posedness of evolution equations

2020 ◽  
Vol 378 (2185) ◽  
pp. 20190616
Author(s):  
S. Boulite ◽  
S. Hadd ◽  
L. Maniar
Keyword(s):  
Evolution Equations ◽  
Semigroup Theory ◽  
Well Posedness ◽  
Boundary Problems ◽  
Neutral Equations ◽  
Infinite Dimensional ◽  
Research Activities ◽  
Semigroup Approach ◽  
History Of ◽  
And Control

In this paper, we cross the boundary between semigroup theory and general infinite-dimensional systems to bridge the isolated research activities in the two areas. Indeed, we first give a chronological history of the development of the semigroup approach for control theory. Second, we use the feedback theory to prove the well-posedness of a class of dynamic boundary problems. Third, the obtained results are applied to the well-posedness of neutral equations with non-autonomous past. We will also see that the strong connection between semigroup and control theories lies in feedback theory, where different kinds of perturbations appear. This article is part of the theme issue ‘Semigroup applications everywhere’.

Piezoelectricity and Its Use in Disturbance Sensing and Control of Flexible Structures: A Survey

1994 ◽  
Vol 47 (4) ◽  
pp. 113-123 ◽  
Author(s):  
S. S. Rao ◽  
M. Sunar
Keyword(s):  
Piezoelectric Materials ◽  
Integrated Control ◽  
Flexible Structures ◽  
Distributed Sensing ◽  
Vibration Measurement ◽  
Response Monitoring ◽  
Effective Control ◽  
Survey Paper ◽  
And Control ◽  
Measurement And Control

Piezoelectric materials are being used at an increasing rate by researchers in the areas of vibration, measurement and control. Due to their distinct features, these materials can be employed in the distributed sensing and control of intelligent structures that have a highly integrated control architecture. By employing piezoelectric materials, it is feasible to achieve an accurate response monitoring and effective control of flexible structures. In this survey paper, the recent research trends addressing piezoelectricity in the context of distributed sensing and control of flexible structures are discussed. A brief history of piezoelectricity is also noted.

ROBOTICS PROJECTS IN SCHOOL INFORMATICS COURSE

2019 ◽  
pp. 52-56
Author(s):  
V. V. Tarapata
Keyword(s):  
Information Transmission ◽  
Educational Robotics ◽  
Project Approach ◽  
Teaching Tools ◽  
Modern School ◽  
Research Activities ◽  
Information Processes ◽  
History Of ◽  
Normative Basis ◽  
Typical Model

The article describes the prerequisites for the use of educational robotics in the school course of informatics, the history of the development of its directions and the normative basis for its use in modern school education. A typical model of an educational robotic project for the organization of research and project activities of students has been proposed. The technological chart of the lesson as an example of the implementation of a robotic project in the framework of the research activities on informatics is considered. Approaches to the organization of educational activities, teaching tools and ways of evaluation in informatics class on the theme “Information processes. Information transmission” when using the project approach are described.

THE EFFECT OF PEER REVIEW STRATEGY ON THE STUDENTS’ ACHIEVEMENT IN WRITING DESCRIPTIVE PARAGRAPH

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Sri Agus Murniasih And I Wayan Dirgeyasa
Keyword(s):  
Peer Review ◽  
Experimental Research ◽  
Research Method ◽  
Alternative Hypothesis ◽  
Control Group ◽  
Post Test ◽  
Class Viii ◽  
And Control ◽  
Essay Test ◽  
Experimental Group

This study was conducted to know the effect of applying Peer Review Strategy on the students’ achievement in writing descriptive paragraph. It was conducted by using experimental research method. This research design was conducted pre-test, post test in experimental and control group. The population of this research was the eight (VIII) grade students of SMP IT IQRA’ Medan. The sample of this research was taken by lottery technique. They were in class VIII-1 by experimental group and the class VIII-2 by control group. The experimental group was taught by using Peer Review Strategy while the control group was given no treatment. The instrument used to collect the data was writing essay test. The data were analyzed by using t-test formula. The result showed that the value of t-observed was higher than the value of t-table. (3,55 > 2,05 (a = 0.05)) with the degree of freedom (df) = 28. It means that there was a significant effect of applying Peer Review Strategy on the students’ achievement in writing descriptive paragraph. So, the alternative hypothesis (Ha) was accepted.

THE EFFECT OF APPLYING SQ3R METHOD ON STUDENTS’ ACHIEVEMENT IN READING COMPREHENSION

2013 ◽  
Vol 2 (2) ◽  
Author(s):  
Pranata Royganda Sihaloho And Masitowarni Siregar
Keyword(s):  
Reading Comprehension ◽  
Research Design ◽  
Conventional Method ◽  
Experimental Research ◽  
T Test ◽  
Control Group ◽  
Multiple Choice Tests ◽  
Choice Tests ◽  
And Control ◽  
Experimental Group

The aim of this study is to discover the effect of applying SQ3R method inreading comprehension. Experimental research design is used as the research method.This research took place at SMA Nasrani 2Medan. There were 2 classes chosen as thesample with 30 students in each class. The classes were divided into two groups namelyexperimental and control group. The experimental group was taught by using SQ3Rmethod and the control group was taught by using conventional method. The instrumentused to collect the data was a set of multiple choice tests, which divided as pre test andpost test. The result of the research was analyzed by using t-test formula. The resultshowed that t-test was higher than t-table (4,23>2,00) at the level of significant 0,05with degree of freedom (df) 58. It means that hypothesis alternative (Ha) is acceptedwhich shows that SQ3R method significantly improves the student’s readingcomprehension.

International Relations at the Beginning of the XX Century in the Works of Vladimir Mikhailovich Khvostov

2019 ◽  
Vol 9 (4) ◽  
pp. 218-221
Author(s):  
Albina Imamutdinova ◽  
Nikita Kuvshinov ◽  
Elena Andreeva ◽  
Elena Venidiktova
Keyword(s):  
Social Sciences ◽  
Foreign Policy ◽  
International Relations ◽  
Significant Role ◽  
Research Activities ◽  
History Of

Abstract The article discusses the research activities of Vladimir Mikhailovich Khvostov, his creative legacy on issues and problems of international relations of the early ХХ century; the life of V.M. Khvostov, characterization and evolution of his approaches and views on the history of international relations, foreign policy. A prominent organizer and theorist in the field of pedagogical Sciences, academician Vladimir Mikhailovich Khvostov played a significant role in the formation of the Academy of pedagogical Sciences of the USSR – the all-Union center of pedagogical thought. As its first President, he paid great attention to the development and improvement of the system of humanitarian education in the school, taking into account all the tasks and requirements imposed by the practice of Communist construction in our country. In his reports and speeches at various scientific sessions and conferences, he repeatedly emphasized the exceptional importance of social Sciences in the training of not only educated girls and boys, but also in the formation of politically literate youth.

MONITORING AND CONTROL OF THE “ANIMAL” SUBSYSTEM IN THE COMPLEX BIOTECHNICAL SYSTEM “MAN-MACHINE-ANIMAL” OF A DAIRY FARM

2020 ◽  
pp. 4-10
Author(s):  
VLADIMIR V. KIRSANOV ◽  
◽  
DMITRIY YU. PAVKIN ◽  
FEDOR E. FEDOR E. VLADIMIROV ◽  
EVGENIY А. NIKITIN ◽  
...  
Keyword(s):  
Dairy Farm ◽  
Animal Husbandry ◽  
Reproductive Organs ◽  
Monitoring And Control ◽  
Lactating Cows ◽  
Research Activities ◽  
Mutual Adaptation ◽  
Biotechnical System ◽  
Complex Project ◽  
And Control

A modern dairy farm is a complex biotechnical “man-machine-animal” system, where purposeful human activity concentrates mainly on the control of the “machine” and “animal” subsystems, thus making the whole system ergatic. Increasing the interaction effi ciency of machine subsystems with biological objects (animals) requires an in-depth study of the properties and characteristics of the latter, their behavior, adaptive and refl ex mechanisms that ensure the mutual adaptation of machine and biological subsystems. The paper considers general functionality of the “animal” subsystem, which includes lists of monitored parameters (functions) in pre-weaning, pre-lactation and lactation periods. In a similar way, functionals of the subsystems of the general musculoskeletal development of the animal’s body, respiratory and digestive organs, comfort of the habitat, development and control of the reproductive organs of lactating cows were obtained accompanied with a list of controlled functions and parameters. To carry out a set of research activities in this fi eld, FSAC VIM is planning to carry out a complex project that will increase the levels of automation, digitalization and intellectualization of animal husbandry, provide for comfortable environment, optimal rediced-impact service modes for animals and their extended productive longevity, increased quality of milk and autonomous functioning of individual local biotechnical subsystems.

THE RISK FACTORS OF MOLAR PREGNANCY

2017 ◽  
pp. 53-58
Author(s):  
Lam Huong Le
Keyword(s):  
High Risk ◽  
Gestational Trophoblastic Disease ◽  
Living Standard ◽  
Control Group ◽  
Uterine Perforation ◽  
Molar Pregnancy ◽  
Health It ◽  
Pregnancy Risk ◽  
History Of ◽  
And Control

Objectives: Molar pregnancy is the gestational trophoblastic disease and impact on the women’s health. It has several complications such as toxicity, infection, bleeding. Molar pregnancy also has high risk of choriocarcinoma which can be dead. Aim: To assess the risks of molar pregnancy. Materials and Methods: The case control study included 76 molar pregnancies and 228 pregnancies in control group at Hue Central Hospital. Results: The average age was 32.7 ± 6.7, the miximum age was 17 years old and the maximum was 46 years old. The history of abortion, miscarriage in molar group and control group acounted for 10.5% and 3.9% respectively, with the risk was higher 2.8 times; 95% CI = 1.1-7.7 (p<0.05). The history of molar pregnancy in molar pregnancy group was 9.2% and the molar pregnancy risk was 11.4 times higher than control group (95% CI = 2.3-56.4). The women having ≥ 4 times births accounted for 7.9% in molar group and 2.2% in control group, with the risk was higher 3.8 times, 95% CI= 1.1-12.9 (p<0.05). The molar risk of women < 20 and >40 years old in molar groups had 2.4 times higher than (95% CI = 1.1 to 5.2)h than control group. Low living standard was 7.9% in molar group and 1.3% in the control group with OR= 6.2; 95% CI= 1.5-25.6. Curettage twice accounted for 87.5%, there were 16 case need to curettage three times. There was no case of uterine perforation and infection after curettage. Conclusion: The high risk molar pregnancy women need a better management. Pregnant women should be antenatal cared regularly to dectect early molar pregnancy. It is nessecery to monitor and avoid the dangerous complications occuring during the pregnancy. Key words: Molar pregnancy, pregnancy women

Modeling and Control of Flexible Structures.

1986 ◽  
Author(s):  
W. H. Bennett ◽  
G. L. Blankenship ◽  
H. G. Kwatny
Keyword(s):  
Flexible Structures ◽  
Modeling And Control ◽  
And Control
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