Corticosteroids : Clinical Pharmacology and Therapeutic Use

Swartz, Stephen L.,Dluhy, Robert G. Medical Publications Korea 1974 Medical Progress Vol.1 No.10

Structural monitoring of wind turbines using wireless sensor networks

Swartz, R. Andrew,Lynch, Jerome P.,Zerbst, Stephan,Sweetman, Bert,Rolfes, Raimund Techno-Press 2010 Smart Structures and Systems, An International Jou Vol.6 No.3

Monitoring and economical design of alternative energy generators such as wind turbines is becoming increasingly critical; however acquisition of the dynamic output data can be a time-consuming and costly process. In recent years, low-cost wireless sensors have emerged as an enabling technology for structural monitoring applications. In this study, wireless sensor networks are installed in three operational turbines in order to demonstrate their efficacy in this unique operational environment. The objectives of the first installation are to verify that vibrational (acceleration) data can be collected and transmitted within a turbine tower and that it is comparable to data collected using a traditional tethered system. In the second instrumentation, the wireless network includes strain gauges at the base of the structure. Also, data is collected regarding the performance of the wireless communication channels within the tower. In both turbines, collected wireless sensor data is used for off-line, output-only modal analysis of the ambiently (wind) excited turbine towers. The final installation is on a turbine with embedded braking capabilities within the nacelle to generate an "impulse-like" load at the top of the tower. This ability to apply such a load improves the modal analysis results obtained in cases where ambient excitation fails to be sufficiently broad-band or white. The improved loading allows for computation of true mode shapes, a necessary precursor to many conditional monitoring techniques.

Using Fully Defined Activation Protocols and Cell-free Screening to Study [FeFe]hydrogenase Maturation and OxygenTolerance

James SWARTZ,Liliana De La PAZ,Jamin KOO,Stacey SHIIGI,Tim SCHNABEL 한국생물공학회 2015 한국생물공학회 학술대회 Vol.2015 No.10

A Theoretical Recapitulation of the Ethical Nature of Islamic Finance and Banking Law

Nico P. Swartz 국제융합경영학회 2014 융합경영연구 Vol.2 No.4

The rule of Islam is simple: if you advance a loan, you are entitled to receive your capital only and nothing more. If you wish to secure profit you should enter into a partnership and become a shareholder. Prohibitions against interest are not peculiar to Islam. If we were to trace back through history, a number of examples of such prohibitions can be found in the early Greek, Roman and Rabinnical thought. With the decline of the influence of the Catholic Church interest transactions become legal and stimulated giant Western corporations which forged capitalist imperialism. The practice of charging interest (usury) now dominated Western law and ethics for over a millennium. But, the Western or capitalist economic system has proven a failure in its quest for economic justice, which serves to benefit all in society, both the rich and the poor. In particular, capitalism is currently causing a terrifying scenario of making the rich richer and the poor poorer due to interest charges. An alternative banking model, called Islamic finance and banking, is evoked in this study in order to depress financial exploitation by banking institutions.

Structural monitoring of wind turbines using wireless sensor networks

R. Andrew Swartz,Jerome P. Lynch,Stephan Zerbst,Bert Sweetman,Raimund Rolfes 국제구조공학회 2010 Smart Structures and Systems, An International Jou Vol.6 No.3

Monitoring and economical design of alternative energy generators such as wind turbines is becoming increasingly critical; however acquisition of the dynamic output data can be a time-consuming and costly process. In recent years, low-cost wireless sensors have emerged as an enabling technology for structural monitoring applications. In this study, wireless sensor networks are installed in three operational turbines in order to demonstrate their efficacy in this unique operational environment. The objectives of the first installation are to verify that vibrational (acceleration) data can be collected and transmitted within a turbine tower and that it is comparable to data collected using a traditional tethered system. In the second instrumentation, the wireless network includes strain gauges at the base of the structure. Also, data is collected regarding the performance of the wireless communication channels within the tower. In both turbines, collected wireless sensor data is used for off-line, output-only modal analysis of the ambiently (wind) excited turbine towers. The final installation is on a turbine with embedded braking capabilities within the nacelle to generate an impulse-like load at the top of the tower. This ability to apply such a load improves the modal analysis results obtained in cases where ambient excitation fails to be sufficiently broad-band or white. The improved loading allows for computation of true mode shapes, a necessary precursor to many conditional monitoring techniques.

Normable Strong Topology에 대하여

슈와츠,이롱루,조민형 金烏工科大學校 1992 論文集 Vol.13 No.-

A useful characterization of normability of strong duals and its interesting consequences are given. One of them is : A Hausdorff locally convex metric space is a normed space if and only if it has fundamental sequence of bounded sets.

Rapid-to-deploy reconfigurable wireless structural monitoring systems using extended-range wireless sensors

Kim, Junhee,Swartz, R. Andrew,Lynch, Jerome P.,Lee, Jong-Jae,Lee, Chang-Geun Techno-Press 2010 Smart Structures and Systems, An International Jou Vol.6 No.5

Wireless structural monitoring systems consist of networks of wireless sensors installed to record the loading environment and corresponding response of large-scale civil structures. Wireless monitoring systems are desirable because they eliminate the need for costly and labor intensive installation of coaxial wiring in a structure. However, another advantageous characteristic of wireless sensors is their installation modularity. For example, wireless sensors can be easily and rapidly removed and reinstalled in new locations on a structure if the need arises. In this study, the reconfiguration of a rapid-to-deploy wireless structural monitoring system is proposed for monitoring short- and medium-span highway bridges. Narada wireless sensor nodes using power amplified radios are adopted to achieve long communication ranges. A network of twenty Narada wireless sensors is installed on the Yeondae Bridge (Korea) to measure the global response of the bridge to controlled truck loadings. To attain acceleration measurements in a large number of locations on the bridge, the wireless monitoring system is installed three times, with each installation concentrating sensors in one localized area of the bridge. Analysis of measurement data after installation of the three monitoring system configurations leads to reliable estimation of the bridge modal properties, including mode shapes.

Decentralized civil structural control using real-time wireless sensing and embedded computing

Wang, Yang,Swartz, R. Andrew,Lynch, Jerome P.,Law, Kincho H.,Lu, Kung-Chun,Loh, Chin-Hsiung Techno-Press 2007 Smart Structures and Systems, An International Jou Vol.3 No.3

Structural control technologies have attracted great interest from the earthquake engineering community over the last few decades as an effective method of reducing undesired structural responses. Traditional structural control systems employ large quantities of cables to connect structural sensors, actuators, and controllers into one integrated system. To reduce the high-costs associated with labor-intensive installations, wireless communication can serve as an alternative real-time communication link between the nodes of a control system. A prototype wireless structural sensing and control system has been physically implemented and its performance verified in large-scale shake table tests. This paper introduces the design of this prototype system and investigates the feasibility of employing decentralized and partially decentralized control strategies to mitigate the challenge of communication latencies associated with wireless sensor networks. Closed-loop feedback control algorithms are embedded within the wireless sensor prototypes allowing them to serve as controllers in the control system. To validate the embedment of control algorithms, a 3-story half-scale steel structure is employed with magnetorheological (MR) dampers installed on each floor. Both numerical simulation and experimental results show that decentralized control solutions can be very effective in attaining the optimal performance of the wireless control system.

Decentralized civil structural control using real-time wireless sensing and embedded computing

Yang Wang,R. Andrew Swartz,Jerome P. Lynch,Kincho H. Law,Kung-Chun Lu,Chin-Hsiung Loh 국제구조공학회 2007 Smart Structures and Systems, An International Jou Vol.3 No.3

Structural control technologies have attracted great interest from the earthquake engineering community over the last few decades as an effective method of reducing undesired structural responses. Traditional structural control systems employ large quantities of cables to connect structural sensors, actuators, and controllers into one integrated system. To reduce the high-costs associated with labor-intensive installations, wireless communication can serve as an alternative real-time communication link between the nodes of a control system. A prototype wireless structural sensing and control system has been physically implemented and its performance verified in large-scale shake table tests. This paper introduces the design of this prototype system and investigates the feasibility of employing decentralized and partially decentralized control strategies to mitigate the challenge of communication latencies associated with wireless sensor networks. Closed-loop feedback control algorithms are embedded within the wireless sensor prototypes allowing them to serve as controllers in the control system. To validate the embedment of control algorithms, a 3-story half-scale steel structure is employed with magnetorheological (MR) dampers installed on each floor. Both numerical simulation and experimental results show that decentralized control solutions can be very effective in attaining the optimal performance of the wireless control system.

Active-Sensing Lamb Wave Propagations for Damage Identification in Honeycomb Aluminum Panels

Flynn, Eric B.,Swartz, R.Andrew,Backman, Daniel E.,Park, Gyu-Hae,Farrar, Charles R. The Korean Society for Nondestructive Testing 2009 한국비파괴검사학회지 Vol.29 No.4

This paper presents a novel approach for Lamb wave based structural health monitoring(SHM) in honeycomb aluminum panels. In this study, a suite of three signal processing algorithms are employed to improve the damage detection capability. The signal processing algorithms used include wavelet attenuation, correlation coefficients of power density spectra, and triangulation of reflected waves. Piezoelectric transducers are utilized as both sensors and actuators for Lamb wave propagation. These SHM algorithms are built into a MatLab interface that integrates and automates the hardware and software operations and displays the results for each algorithm to the analyst for side by side comparison. The effectiveness of each of these signal processing algorithms for SHM in honeycomb aluminum panels under a variety of damage conditions is then demonstrated.