scholarly journals Experimental Issues in Testing a Semiactive Technique to Control Earthquake Induced Vibration

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Nicola Caterino ◽  
Mariacristina Spizzuoco ◽  
Julian M. Londoño ◽  
Antonio Occhiuzzi
Keyword(s):  
Large Scale ◽  
Experimental Testing ◽  
Practical Experience ◽  
Structural Testing ◽  
Frame Structure ◽  
Semiactive Control ◽  
Electrical Currents ◽  
Wide Range ◽  
And Control ◽  
Steel Frame Structure

This work focuses on the issues to deal with when approaching experimental testing of structures equipped with semiactive control (SA) systems. It starts from practical experience authors gained in a recent wide campaign on a large scale steel frame structure provided with a control system based on magnetorheological dampers. The latter are special devices able to achieve a wide range of physical behaviours using low-power electrical currents. Experimental activities involving the use of controllable devices require special attention in solving specific aspects that characterize each of the three phases of the SA control loop: acquisition, processing, and command. Most of them are uncommon to any other type of structural testing. This paper emphasizes the importance of the experimental assessment of SA systems and shows how many problematic issues likely to happen in real applications are also present when testing these systems experimentally. This paper highlights several problematic aspects and illustrates how they can be addressed in order to achieve a more realistic evaluation of the effectiveness of SA control solutions. Undesired and unavoidable effects like delays and control malfunction are also remarked. A discussion on the way to reduce their incidence is also offered.

THE SOME QUESTIONS OF AUTONOMOUS MOTION AND MANAGEMENT OF LAND-MOBILE ROBOTIC COMPLEXES FOR UKRAINIAN GROUND FORCESE

2019 ◽  
pp. 53-58
Author(s):  
О. Кravchuk ◽  
V. Symonenkov ◽  
I. Symonenkova ◽  
O. Hryhorev
Keyword(s):  
Large Scale ◽  
Armed Forces ◽  
Distributed Information ◽  
Wide Range ◽  
Highly Effective ◽  
Information Management Systems ◽  
Robotic Devices ◽  
Principles And Standards ◽  
And Control ◽  
The Eu

Today, more than forty countries of the world are engaged in the development of military-purpose robots. A number of unique mobile robots with a wide range of capabilities are already being used by combat and intelligence units of the Armed forces of the developed world countries to conduct battlefield intelligence and support tactical groups. At present, the issue of using the latest information technology in the field of military robotics is thoroughly investigated, and the creation of highly effective information management systems in the land-mobile robotic complexes has acquired a new phase associated with the use of distributed information and sensory systems and consists in the transition from application of separate sensors and devices to the construction of modular information subsystems, which provide the availability of various data sources and complex methods of information processing. The purpose of the article is to investigate the ways to increase the autonomy of the land-mobile robotic complexes using in a non-deterministic conditions of modern combat. Relevance of researches is connected with the necessity of creation of highly effective information and control systems in the perspective robotic means for the needs of Land Forces of Ukraine. The development of the Armed Forces of Ukraine management system based on the criteria adopted by the EU and NATO member states is one of the main directions of increasing the effectiveness of the use of forces (forces), which involves achieving the principles and standards necessary for Ukraine to become a member of the EU and NATO. The inherent features of achieving these criteria will be the transition to a reduction of tasks of the combined-arms units and the large-scale use of high-precision weapons and land remote-controlled robotic devices. According to the views of the leading specialists in the field of robotics, the automation of information subsystems and components of the land-mobile robotic complexes can increase safety, reliability, error-tolerance and the effectiveness of the use of robotic means by standardizing the necessary actions with minimal human intervention, that is, a significant increase in the autonomy of the land-mobile robotic complexes for the needs of Land Forces of Ukraine.

Feasibility Study of Tank Failure Test With “E-Defense”

2002 ◽  
Author(s):  
Shojiro Oka ◽  
Kouichi Kajiwara ◽  
Tomohiro Itoh
Keyword(s):  
Feasibility Study ◽  
Large Scale ◽  
Earth Science ◽  
Shaking Table ◽  
Frame Structure ◽  
Test Facility ◽  
Specimen Handling ◽  
Kobe Earthquake ◽  
Preliminary Planning ◽  
Steel Frame Structure

After the 1995 Kobe earthquake in Japan, National Research Institute for Earth Science and Disaster Prevention started to construct a large-scale 3-D shaking table, called “E-Defense”. The facility is to be completed in 2005, and failure experiments of many kinds of structures are to be performed. As for a feasibility study of those experiments, a plan of a full-scale tank failure test was investigated. A steel cylindrical tank of 990m3 capacity was selected as a typical liquid storage tank. The height is about 15m and the diameter is about 10m. The total mass, with full of water, is about 1 MN (1,000 tonf). The tank is constructed on a steel frame structure for specimen handling and test facility protection, and set on the shaking table. To prevent facility failure due to a mass of water leakage, waterproof walls are necessary at the lower part of the frame. Ground motion recorded at the Kobe earthquake is applied to the shaking table, and elephant foot bulge buckling is expected to occur at the bottom portion of the tank. Through this preliminary planning, technical feasibility of tank failure tests was confirmed, and problems to be solved for actual planning were clarified.

NEW CHALLENGES FACING INTEGRATIVE BIOLOGICAL SCIENCE IN THE POST-GENOMIC ERA

2006 ◽  
Vol 14 (02) ◽  
pp. 275-293 ◽  
Author(s):  
CHRISTOPHER S. OEHMEN ◽  
TJERK P. STRAATSMA ◽  
GORDON A. ANDERSON ◽  
GALYA ORR ◽  
BOBBIE-JO M. WEBB-ROBERTSON ◽  
...  
Keyword(s):  
Paradigm Shift ◽  
Large Scale ◽  
Experimental Testing ◽  
Spatial Scales ◽  
Geographical Area ◽  
Biological Data ◽  
Biological Research ◽  
Complex Data ◽  
Discovery Research ◽  
Wide Range

The future of biology will be increasingly driven by the fundamental paradigm shift from hypothesis-driven research to data-driven discovery research employing the growing volume of biological data coupled to experimental testing of new discoveries. But hardware and software limitations in the current workflow infrastructure make it impossible or intractible to use real data from disparate sources for large-scale biological research. We identify key technological developments needed to enable this paradigm shift involving (1) the ability to store and manage extremely large datasets which are dispersed over a wide geographical area, (2) development of novel analysis and visualization tools which are capable of operating on enormous data resources without overwhelming researchers with unusable information, and (3) formalisms for integrating mathematical models of biosystems from the molecular level to the organism population level. This will require the development of algorithms and tools which efficiently utilize high-performance compute power and large storage infrastructures. The end result will be the ability of a researcher to integrate complex data from many different sources with simulations to analyze a given system at a wide range of temporal and spatial scales in a single conceptual model.

scholarly journals Safety and Health Management Commitment and Implementation of COVID-19 Prevention at Manufacture Workplace Environment

2020 ◽  
Vol 202 ◽  
pp. 12015
Author(s):  
Priska Dantjie ◽  
Yuliani Setyaningsih ◽  
Nurjazuli
Keyword(s):  
Prevention And Control ◽  
Large Scale ◽  
Health Management ◽  
Manufacturing Companies ◽  
Production Chain ◽  
Workplace Environment ◽  
Safety And Health ◽  
Wide Range ◽  
Management Commitment ◽  
And Control

West Java has been conducting Policy of Large-Scale of Social Restriction (in bahasa Pembatasan Sosial Berskala Besar or PSBB). However several companies in wide range of industries are allowed to run the production with health protocol that need to be fulfilled by company in order to keep the worker’s health during this pandemic. One of manufacturing companies with 307 workers in Bekasi Regency is still running the production as part of food production chain. As Indonesian Health Ministry Guidelines for Prevention and Control COVID-19 at Office and Industry Workplace during Policy of PSBB need to be fulfilled, the company implements several actions to protect the worker from COVID-19 at workplace environment. At this moment, safety and health management commitment need to be assessed making sure implementation of the guidelines. In order to make sure COVID-19 prevention, there must be implementation evaluation of Guidelines for Prevention and Control of COVID-19 at Office and Industry Workplace during PSBB Policy. Study shows although the finding of low level safety and health management commitment from worker’s perception, majority Guidelines for Prevention COVID-19 at Office and Industry Workplace during PSBB that focus for workplace environment have been facilitated by the management of company.

The Romans in Britain

2017 ◽  
Author(s):  
Richard Hingley
Keyword(s):  
Material Culture ◽  
Indigenous People ◽  
Large Scale ◽  
First Century ◽  
Imperial Culture ◽  
The Past ◽  
Military Presence ◽  
Wide Range ◽  
Colonial Contact ◽  
And Control

This chapter addresses the ways in which Roman colonization operated within the Roman Empire’s province of Britannia during the first century CE, and analyzes theoretical aproaches to colonialism, colonisation, Romanisation, and imperalism. Roman colonies were formally established settlements of Roman citizens and several existed in Britain. But Britain was also colonized through additional mechanisms, including large-scale migration, a substantial military presence, and an incorporative imperial culture. Questions about the extent to which the indigenous people became Romanized or retained native ways are explored, and the chapter questions how thoroughly indigenous frontier populations adopted colonists’ ideologies and material culture. The evidence suggests a wide range of different responses to colonial contact and control, issues that have been drawn upon by the British in their colonial activities over the past centuries.

Study on Performance Evaluation of MEMS Sensors and Data Integration Methods for Expected Use to Determine Damage Degrees of Existing Structures

2017 ◽  
Vol 12 (5) ◽  
pp. 858-867 ◽  
Author(s):  
Tomohiro Sasaki ◽  
◽  
Koichi Kajiwara ◽  
Takuzo Yamashita ◽  
Takuya Toyoshi
Keyword(s):  
Performance Evaluation ◽  
Structural Damage ◽  
Large Scale ◽  
Earth Science ◽  
Frame Structure ◽  
Micro Electro Mechanical Systems ◽  
Strong Earthquakes ◽  
Existing Structures ◽  
Earthquake Simulator ◽  
Steel Frame Structure

The shake table test of small-scaled steel frame structure was conducted using large-scale earthquake simulator at the National Research Institute for Earth Science and Disaster Resilience (NIED) in Tsukuba, Ibaragi. This paper presents the performance evaluation of Micro Electro Mechanical Systems (MEMS) type accelerometers, which are recently being used in various fields, comparing with the conventional servo type accelerometers. In addition, this paper discussed the integration method of the measured acceleration into displacements, which is suitable for structural damage evaluation due to strong earthquakes.

Electron microscopy study of reactively sputter-deposited Ti/N films on silicon

1992 ◽  
Vol 50 (2) ◽  
pp. 1362-1363
Author(s):  
V. C. Kannan ◽  
A. K. Singh ◽  
R. B. Irwin ◽  
S. Chittipeddi ◽  
F. D. Nkansah ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Large Scale ◽  
Hexagonal Phase ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Process Conditions ◽  
Tin Films ◽  
Wide Range ◽  
Fcc Phase ◽  
Circuits Vlsi

Titanium nitride (TiN) films have historically been used as diffusion barrier between silicon and aluminum, as an adhesion layer for tungsten deposition and as an interconnect material etc. Recently, the role of TiN films as contact barriers in very large scale silicon integrated circuits (VLSI) has been extensively studied. TiN films have resistivities on the order of 20μ Ω-cm which is much lower than that of titanium (nearly 66μ Ω-cm). Deposited TiN films show resistivities which vary from 20 to 100μ Ω-cm depending upon the type of deposition and process conditions. TiNx is known to have a NaCl type crystal structure for a wide range of compositions. Change in color from metallic luster to gold reflects the stabilization of the TiNx (FCC) phase over the close packed Ti(N) hexagonal phase. It was found that TiN (1:1) ideal composition with the FCC (NaCl-type) structure gives the best electrical property.

Collaboration, Power, Participation and Control on a Large Scale Research Team: Multiple Perspectives from the Oxford House Research Project

2001 ◽  
Author(s):  
Bradley Olson ◽  
Leonard Jason ◽  
Joseph R. Ferrari ◽  
Leon Venable ◽  
Bertel F. Williams ◽  
...  
Keyword(s):  
Large Scale ◽  
Research Team ◽  
Multiple Perspectives ◽  
Research Project ◽  
Oxford House ◽  
And Control

Interference mitigation in point to point wireless sensor networks using LSP protocol and time division multiplexing approach

2020 ◽  
Vol 39 (4) ◽  
pp. 5449-5458
Author(s):  
A. Arokiaraj Jovith ◽  
S.V. Kasmir Raja ◽  
A. Razia Sulthana
Keyword(s):  
Energy Consumption ◽  
Large Scale ◽  
Control Parameter ◽  
Interference Mitigation ◽  
Wireless Sensor ◽  
Point To Point ◽  
A Minor ◽  
Two Stages ◽  
Time Division ◽  
And Control

Interference in Wireless Sensor Network (WSN) predominantly affects the performance of the WSN. Energy consumption in WSN is one of the greatest concerns in the current generation. This work presents an approach for interference measurement and interference mitigation in point to point network. The nodes are distributed in the network and interference is measured by grouping the nodes in the region of a specific diameter. Hence this approach is scalable and isextended to large scale WSN. Interference is measured in two stages. In the first stage, interference is overcome by allocating time slots to the node stations in Time Division Multiple Access (TDMA) fashion. The node area is split into larger regions and smaller regions. The time slots are allocated to smaller regions in TDMA fashion. A TDMA based time slot allocation algorithm is proposed in this paper to enable reuse of timeslots with minimal interference between smaller regions. In the second stage, the network density and control parameter is introduced to reduce interference in a minor level within smaller node regions. The algorithm issimulated and the system is tested with varying control parameter. The node-level interference and the energy dissipation at nodes are captured by varying the node density of the network. The results indicate that the proposed approach measures the interference and mitigates with minimal energy consumption at nodes and with less overhead transmission.

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