Relevant bibliographies by topics / Impedance

Academic literature on the topic 'Impedance'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 July 2024

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Journal articles on the topic "Impedance"

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Kurniawan, Widodo Budi. "PENGUKURAN NILAI DIELEKTRIK MATERIAL CALCIUM COPPER TITANAT ( CaCu3Ti4O12) MENGGUNAKAN SPEKTROSKOPI IMPEDANSI TERKOMPUTERISASI." Jurnal Sains Dasar 6, no. 1 (May 22, 2017): 26. http://dx.doi.org/10.21831/jsd.v6i1.13565.

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Telah dilakukan pengukuran tetapan dielektrik kompleks dan besarnya impedansi kapasitor pada material keramik Calcium Copper Titanate dengan struktur material CaCu3Ti4O12 (CCTO) dengan kemurnian 99 % menggunakan metode spektroskopi impedansi terkomputerisasi dalam rentang frekuensi 5 kHz – 120 kHz. Tetapan dielektrik maksimum terukur pada sampel yang disintering dengan suhu 7000C yaitu 745 pada frekuensi 5 kHz dan besarnya impedansi kapasitor maksimum terjadi pada sampel CCTO non sintering yaitu 150434 Ω. Hasil penelitian menunjukkan adanya pengaruh frekuensi terhadap tetapan dielektrik kompleks dan impedansi kapasitor dari material yang diteliti. Kata kunci : spektroskopi impedansi, CaCu3Ti4O12, tetapan dielektrik kompleks dan impedansi kapasitor. MEASUREMENT OF THE DIELECTRIC CONSTANT CALCIUM COPPER TITANATE (CaCu3Ti4O12) MATERIALS USING COMPUTERIZED IMPEDANCE SPECTROSCOPY ABSTRACT The measurement of the complex dielectric constant and the magnitude of the capacitor impedances of the ceramic materials Calcium Copper Titanate CaCu3Ti4O12 (CCTO) with purity of 99% has been done by using the method of computerized impedance spectroscopy in the frequency range 5 kHz - 120 kHz. The highest dielectric constant of the material was found to be 745 at 5 kHz in the sample sintered 7000C and the highest impedance of capacitor occured in CCTO sample non sintered that is 150434Ω. The results showed that complex dielectric constant and impedance of the capacitor of the material under study was frequency dependent. Keywords : impedance spectroscopy, CaCu3Ti4O12,complex dielectric constant and impedance of capacitor
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Zhang, Wei-Bo, Dong-Myong Jeong, Yong-Heum Lee, and Myeong Soo Lee. "Measurement of Subcutaneous Impedance by Four-Electrode Method at Acupoints Located with Single-Power Alternative Current." American Journal of Chinese Medicine 32, no. 05 (January 2004): 779–88. http://dx.doi.org/10.1142/s0192415x04002351.

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A Single-Power Alternating Current (SPAC) instrument was used to measure the low-impedance acupoints around Ho-Ku (LI-4), Yang-Hsi (LI-5), Yang-Ch'ih (TB-4), Yang-Ku (SI-5), T'ai-Yuan (Lu-9), Ta-Lung (EH-7) and Shen-Men (He-7). A four-electrode instrument was used to measure the subcutaneous impedance at these low-impedance acupoints and adjacent control points on 12 healthy people. The mean subcutaneous impedance at the acupoints was 49.8±8.4 Ω, significantly lower than the impedance of 53.5±9.3 Ω for the control points (P<0.005). Of the seven acupoints, five (71%) had significantly lower impedances than the mean impedance for the adjacent control points. Seven of the 14 control points had significantly higher impedances than the adjacent acupoints, with most control points (93%) having higher impedances than adjacent acupoints. In conclusion, subcutaneous impedance is lower at the low-impedance points as measured with the SPAC two-electrode method. One interpretation of these results is that more interstitial fluid lies beneath the low-impedance acupoints.
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Thompson, D. "Partially Fractal Impedance Networks." Zeitschrift für Naturforschung A 53, no. 10-11 (November 1, 1998): 819–22. http://dx.doi.org/10.1515/zna-1998-10-1103.

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Abstract We analyse linear networks of impedances in the case when the impedances at every level differ by a factor of b from those at the previous level. Such networks can be used as models for rough surfaces, in which case there will exist a level of finest detail which must be taken into account in any calculation. We obtain an exact expression for the ratio of the impedance of the network to the outer impedance for an arbitrary number of elements in the network. We show that this class of networks shows a transition from a fractal geometric structure to a non-fractal structure according to the value of b. However, their effective impedance is never fractal.
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Lee, Woochan, and Dukju Ahn. "Wireless Power Transfer under Wide Distance Variation Using Dual Impedance Frequency." Electronics 9, no. 1 (January 7, 2020): 110. http://dx.doi.org/10.3390/electronics9010110.

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A dual-impedance operation, where coil impedance is controlled by operating frequency selection, is proposed to maintain optimum reflected impedance across coupling variation. More specifically, this work focuses on how high coupling between coils presents excessively high reflected resistance to transmitter (Tx) inverters, degrading the efficiency and output power of the inverter. To overcome this problem, the proposed system is equipped with dual-impedance coil and selects high- or low-impedance coil based on the ability to operate both at 200 kHz and 6.78 MHz frequencies. The reactive impedances of 6.78 MHz coils are designed to be higher than that of 200 kHz coils. Since the reflected resistance is proportional to the coil impedances and coupling squared, at close distance with high coupling coefficient, 200 kHz coils with low coil impedances are activated to prevent an excessive rise in reflected resistance. On the other hand, at large distance spacing with low coupling coefficient, 6.78 MHz coils with high coil impedances are activated so that sufficient reflected resistance is obtained even under the small coupling. The proposed system’s advantages are the high efficiency and the elimination of bulky mechanical relay switches. Measured efficiencies are 88.6–50% across 10 coupling variations.
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Liu, Hongmei, Yongquan Guo, Xinshuo Wang, Shaojun Fang, and Zhongbao Wang. "Design of Compact Complex Impedance Transformer with Frequency and Terminal Impedance Tunability." Electronics 11, no. 7 (March 22, 2022): 983. http://dx.doi.org/10.3390/electronics11070983.

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In the paper, a compact complex impedance transformer (CIT) composed of the cascading of three varactors loaded coupled lines and two variable shunt susceptances was proposed. Highly flexible tunability functions including only frequency tunable, only impedance tunable, and both frequency and impedance tunable can be achieved by tuning the capacitance of two types of varactors and the value of the susceptance. Design equations were derived using the even–odd mode analysis and examples are given for descripting the design procedures. For validation, a prototype was designed and fabricated. During measurement, three cases were exhibited. When the termination impedance was fixed, the measured center frequency can be tuned in the range of 1.1–2.1 GHz (62.5%). When the frequency was determined, different terminal impedances can be matched by the prototype. The function of frequency tunable at different terminal impedances is also trated by the measured results. After comparison, the potential of the proposed CIT for applications in radio frequency front-end were demonstrated.
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Cai, Zheng, Sainan Li, Qi Zhang, Chenyuan Wang, Zhen Jin, Ming Fu, Shuai Zhang, Ming Liang, Zulu Wang, and Yaling Han. "Derivation and Verification of the Relationship between Ablation Index and Baseline Impedance." Cardiology Research and Practice 2021 (July 12, 2021): 1–6. http://dx.doi.org/10.1155/2021/5574125.

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Objective. To explore the quantitative adjustment of ablation index (AI) under different baseline impedance to achieve similar lesion dimensions. Methods. (1) Keeping the AIs relatively constant, the lesion dimensions in different baseline impedances were studied. (2) According to Joule's law, Q = I2RT, keeping the current (I) unchanged, the powers corresponding to different baseline impedances can be obtained. Under different baseline impedances and corresponding powers, the swine hearts were ablated for 30 s in simulated human circumstances. The baseline impedances, the lesion dimensions, and AIs were recorded. And the derivation of empirical formula was achieved according to the AIs and baseline impedance values in similar lesions dimension. (3) Basic AI and baseline impedance (AI0/R0) were set as 400/120 Ω in the common AI groups and 550/120 Ω in the high AI groups, AI values in different baseline impedances were calculated using the empirical formula, and the corresponding lesion dimensions were measured to verify this formula. Results. (1) Higher baseline impedances were related to smaller lesion dimensions at similar AIs. (2) The lesion dimensions were roughly the same after modulating the baseline impedance and power to keep the electric current relatively constant. The relationship between AI and R fitted with experimental data is AI = 1.9933R + 203.61 (r = 0.9649), and the formula derived is ΔAI = (AI0 − 203)/R0 × ΔR. (3) Under the guidance of the empirical formula, there was no significant difference in lesion dimensions between the standard group and the formula guiding groups when AI0 = 400, but there was a shrinking tendence when AI > 700. Conclusion. The lesion depths are negatively correlated with baseline impedance at a certain AI. The relationship between baseline impedance and AI is “ΔAI = (AI0 − 203)/R0 × ΔR”. It is verified that when the AI is not too high, the empirical formula can be used to guide the quantitative adjustment of AIs at different baseline impedance, and the lesion depths achieved are roughly the same.
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Irastorza, Ramiro M., Timothy Maher, Michael Barkagan, Rokas Liubasuskas, Juan J. Pérez, Enrique Berjano, and Andre d’Avila. "Limitations of Baseline Impedance, Impedance Drop and Current for Radiofrequency Catheter Ablation Monitoring: Insights from In Silico Modeling." Journal of Cardiovascular Development and Disease 9, no. 10 (October 3, 2022): 336. http://dx.doi.org/10.3390/jcdd9100336.

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Background: Baseline impedance, radiofrequency current, and impedance drop during radiofrequency catheter ablation are thought to predict effective lesion formation. However, quantifying the contributions of local versus remote impedances provides insights into the limitations of indices using those parameters. Methods: An in silico model of left atrial radiofrequency catheter ablation was used based on human thoracic measurements and solved for (1) initial impedance (Z), (2) percentage of radiofrequency power delivered to the myocardium and blood (3) total radiofrequency current, (4) impedance drop during heating, and (5) lesion size after a 25 W–30 s ablation. Remote impedance was modeled by varying the mixing ratio between skeletal muscle and fat. Local impedance was modeled by varying insertion depth of the electrode (ID). Results: Increasing the remote impedance led to increased baseline impedance, lower system current delivery, and reduced lesion size. For ID = 0.5 mm, Z ranged from 115 to 132 W when fat percentage varied from 20 to 80%, resulting in a decrease in the RF current from 472 to 347 mA and a slight decrease in lesion size from 5.6 to 5.1 mm in depth, and from 9.2 to 8.0 mm in maximum width. In contrast, increasing the local impedance led to lower system current but larger lesions. For a 50% fat–muscle mixture, Z ranged from 118 to 138 W when ID varied from 0.3 to 1.9 mm, resulting in a decrease in the RF current from 463 to 443 mA and an increase in lesion size, from 5.2 up to 7.5 mm in depth, and from 8.4 up to 11.6 mm in maximum width. In cases of nearly identical Z but different contributions of local and remote impedance, markedly different lesions sizes were observed despite only small differences in RF current. Impedance drop better predicted lesion size (R2 > 0.93) than RF current (R2 < 0.1). Conclusions: Identical baseline impedances and observed RF currents can lead to markedly different lesion sizes with different relative contributions of local and remote impedances to the electrical circuit. These results provide mechanistic insights into the advantage of measuring local impedance and identifies potential limitations of indices incorporating baseline impedance or current to predict lesion quality.
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Arada, Gerald Pacaba. "A Study on Input Impedance and Self/Mutual Impedances of Orthogonal Crossed Circular Loops." Journal of Advanced Research in Dynamical and Control Systems 12, SP8 (July 30, 2020): 1062–72. http://dx.doi.org/10.5373/jardcs/v12sp8/20202619.

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Nie, Yafei, Jie Wang, Chengshi Zheng, Jian Xu, Xiaodong Li, Yu Wang, Bo Zhong, Juanjuan Cai, and Jinqiu Sang. "Measurement and modeling of the mechanical impedance of human mastoid and condyle." Journal of the Acoustical Society of America 151, no. 3 (March 2022): 1434–48. http://dx.doi.org/10.1121/10.0009618.

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Bone conduction devices are used in audiometric tests, hearing rehabilitation, and communication systems. The mechanical impedance of the stimulated skull location affects the performance of the bone conduction devices. In the present study, the mechanical impedances of the mastoid and condyle were measured in 100 Chinese subjects aged from 22 to 67 years. The results show that the mastoid and condyle impedances within the same subject differ significantly and the impedance differences between subjects at the same stimulation position are mainly below the resonance frequency. The mechanical impedance of the mastoid is significantly influenced by age, and not related to gender or body mass index (BMI). While the mechanical impedance of the condyle is significantly affected by BMI, followed by gender, and not related to age. There are some differences in mastoid impedance between the Chinese and Western subjects. An analogy model predicts that the difference in mechanical impedance between the mastoid and condyle leads to a significant difference in the output force of the bone conduction devices. The results can be used to develop improved condyle and mastoid stimulators for the Chinese.
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Huang, Shichun, Liang Yu, and Weikang Jiang. "Measurement of loudspeaker mechanical impedance by changing the sound load at the throat of loudspeaker." INTER-NOISE and NOISE-CON Congress and Conference Proceedings 263, no. 1 (August 1, 2021): 5457–66. http://dx.doi.org/10.3397/in-2021-3112.

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A loudspeaker is a device that converts electrical energy into acoustic energy by coupling between electrical impedance, mechanical impedance, and radiation impedance. The loudspeaker electro-mechanical-acoustic coupling model provides the experimental feasibility to measure the characteristic parameters. In this paper, an economical and practical measurement method of loudspeaker mechanical impedance is proposed. First, the mathematical relationship between loudspeaker electrical impedance and mechanical impedance is obtained based on the loudspeaker electro-mechanical-acoustic coupling model. Second, two electrical impedances with different known radiation impedance are measured by using a developed measurement system. Finally, the real and imaginary parts of the mechanical impedance are obtained according to the mathematical relationship. This method neither assumes that the loudspeaker mechanical impedance is constant in a frequency band nor does it build FEM models based on structural parameters. A loudspeaker is measured by using a developed measurement system. The result shows that the mechanical impedance and the force factor are functions of frequency. Moreover, a radiation impedance measurement is performed to verify the feasibility and accuracy of the proposed method.
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Dissertations / Theses on the topic "Impedance"

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Sánchez, Terrones Benjamín. "Broadband electrical impedance spectroscopy for dynamic electrical bio-impedance characterization." Doctoral thesis, Universitat Politècnica de Catalunya, 2012. http://hdl.handle.net/10803/132281.

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The electrical impedance of biological samples is known in the literature as Electrical Bioimpedance (EBI). The Electrical Bioimpedance enables to characterize physiological conditions and events that are interesting for physiological research and medical diagnosis. Although the Electrical Bioimpedance weakness is that it depends on many physiological parameters, on the other hand, it is suitable for many medical applications where minimally invasive and real-time measurements with simple and practical implementations are needed. The Electrical Impedance Spectroscopy (EIS) techniques based on broadband excitations are expected to help to understand various unsolved problems in biomedical applications. Broadband EIS opens up the possibility to reduce drastically the measuring time for acquiring EBI time-variations but, at the same time, measuring in a short time compromises the EBI accuracy. The way to overcome this intrinsic loss of accuracy relies on the design of the appropriate time/frequency input excitation properties and the use of the suitable spectral analysis processing techniques. The presented thesis covers the topics related to study of broadband excitations for Impedance Spectroscopy in biomedical applications and, more specific, the influence of the multisine excitation time/frequency properties on the impedance spectrum accuracy and its optimization. Furthermore, an advanced fast signal processing method has been implemented to process in real-time EBI data corrupted by transients, a common situation when measuring in a short measuring time. Despite being the goal to apply all this knowledge for myocardial tissue regeneration monitoring, at the moment of drafting the thesis, any of the research projects that have supported this thesis have issued functional beating tissue. For that reason, the theory presented has been validated by a set of experimental measurements over animals and patients where the impedance spectrum time-varying properties were pretended to be characterized. The thesis presents novel findings of relevance of a successful application of broadband EIS in two different measurement campaigns where it has been put in practice: (1) within the collaboration of the pneumology and cardiology service from Hospital Santa Creu i Sant Pau for in-vivo human lung tissue characterization, and (2), within the measurement of animal healthy myocardium tissue electrical impedance including its dynamic behavior during the cardiac cycle.
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Leung, Hing Tong Lucullus. "Development of an electrical impedance tomograph for complex impedance imaging." Thesis, University of South Wales, 1991. https://pure.southwales.ac.uk/en/studentthesis/development-of-an-electrical-impedance-tomograph-for-complex-impedance-imaging(b3f26e76-490d-4364-a270-28cff1dccd70).html.

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This project concerns the development of electrical impedance tomography towards the production of complex impedance images. The prime intention was to investigate the feasibility of developing suitable instrumentation; but not clinical applications. It was aimed to develop techniques for the performance evaluation of data collection systems. To achieve this it was necessary to design and develop a multi· current source type impedance tomography system, to act as a platform for the current study and for future work. The system developed is capable of producing conductivity and permittivity images. It employs microprocessor based data collection electronics, providing portability between a range of possible host computers. The development of the system included a study of constant amplitude current source circuits leading to the design and employment of a novel circuit. In order to aid system testing, a surface mount technology resistor-mesh test object was produced. This has been adopted by the EEC Concerted Action on Impedance Tomography (CAIT) programme as the first standard test object. A computer model of the phantom was produced using the industry standard ASTEC3 circuit simulation package. This development allows the theoretical performance of any system topology, at any level of detail, to be established. The imaging system has been used to produce images from test objects, as well as forearm and lung images on humans. Whilst the conductivity images produced were good, the permittivity in-vivo images were noisy, despite good permittivity images from test objects. A study of the relative merits of multiple and single stimulus type systems was carried out as a result of the discrepancies in the in-vivo and test object images. This study involved a comparison of the author's system with that of Griffiths at the University Hospital of Wales. The results showed that the multi current source type system, whilst able to reduce stray capacitance, creates other more significant errors due to circuit matching; future development in semiconductor device technology may help to overcome this difficulty. It was identified that contact impedances together with the effective capacitance between the measurement electrode pairs in four-electrode systems reduces the measurability of changes in phase. A number of benchmarking indices were developed and implemented, both for system characterisation and for practical/theoretical design comparisons.
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Doyon, Michel. "Decentralized impedance control." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=26384.

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Many applications of manipulators to date have been based on position control, but when a robot manipulator makes contact with the environment, the control of force and position is required. One approach, impedance control, is to control the manipulator such that the relationship between position and force is well defined. For example, such that the robot behaves like a mass-spring-damper system whose parameters can be specified arbitrarily. In the recent years, many of the impedance control implementations were using force feedback from an end-effector force sensor and the impedance control was performed by forming the error in Cartesian coordinates. The implementation proposed here requires instead co-located torque sensors and the feedback control signals are based solely on joint variables, torque and displacement. Co-located torque sensors lead to a larger control bandwidth since the structural dynamics of the arm is seen as a perturbation, but is not part of the plant to be controlled. Simple SISO controllers, designed to modulate individual joint impedances, can achieve diagonal (decoupled) impedance matrices in Cartesian coordinates, provided that a set of SISO compensators, called her "decouplers", are set up to cancel the non-linear coupling among the joints. This strategy results in a simple computational architecture which does not require complex coordinates transformations to be performed at servo rate. The method can be used with non-redundant and redundant manipulators and experimental results are discussed using a seven DOF manipulator available at the Institut de recherche d'Hydro-Quebec.
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Love, Lonnie J. "Adaptive impedance control." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/15911.

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Bernabini, Catia. "Micro-impedance cytometry." Thesis, University of Southampton, 2010. https://eprints.soton.ac.uk/178259/.

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Electrical impedance spectroscopy is a non-invasive and label free technique that allows for rapid counting and characterisation of particles in suspension based on their response to applied AC potentials. In recent years, lab-on-a-chip technologies have been developed to enable single-cell impedance detection and a wide range of impedance-based microfluidic devices have been reported. Despite the number of contributions and the achievements of this field, micro-impedance cytometry still suffers from a lack of sensitivity and specificity compared to traditional flow cytometry, which limits the potential commercialization of microfluidic impedance devices. While impedance measurements of beads and cells are well established, discrimination between particles that are very similar in size or detection of small particles (around 1 μm in diameter) such as bacteria, still represents a difficult task. A number of issues limit the sensitivity and specificity of these microfluidic systems. Primarily, the sensitivity is governed by the dimension of the sample analysis volume. A small volume gives a high sensitivity, but this can lead to practical problems, including fabrication and clogging of the device. In addition, the spatial location of each particle needs to be controlled accurately within the field. Therefore, an efficient and accurate method for focussing the particles in the centre of the electric field is important. In this thesis, a micro-impedance cytometer for the detection of small particles and bacteria and for the discrimination of particles that are very similar in size is presented. The device consists of a microfluidic channel where two pairs of microfabricated electrodes are provided to perform differential measurements of single particles in suspension at high speed. Different electrode configurations and different techniques for focussing the sample within the detection region of the device are investigated in order to improve the sensitivity of the system without reducing the dimensions of the microfluidic channel. Detection at a volume ratio of particle to an estimated sensing volume of 0.007% and discrimination of 1 μm and 2 μm diameter polystyrene beads and E. coli are demonstrated. The micro-impedance cytometer is also proven to be a reliable and effective system to investigate and determine the unknown dielectric properties of particles in suspension, such as polyelectrolyte microcapsules
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Liu, Hongze. "A High-Resolution Microscopic Electrical Impedance Imaging Modality: Scanning Impedance Imaging." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1729.pdf.

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Zhang, Guidong [Verfasser]. "Impedance networks matching mechanism and design of impedance networks converters / Guidong Zhang." Hagen : Fernuniversität Hagen, 2015. http://d-nb.info/1079393064/34.

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Talabani, Habib. "Investigation into the impedance imaging technique scanning photo-induced impedance microscropy (SPIM)." Thesis, University of Sheffield, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412789.

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Sun, Tao. "Single cell impedance spectroscopy." Thesis, University of Southampton, 2007. https://eprints.soton.ac.uk/265320/.

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Foley, John J. "Microfluidic Electrical Impedance Spectroscopy." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1950.

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The goal of this study is to design and manufacture a microfluidic device capable of measuring changes in impedance valuesof microfluidic cell cultures. Tocharacterize this, an interdigitated array of electrodes was patterned over glass, where it was then bonded to a series of fluidic networks created in PDMS via soft lithography. The device measured ethanol impedance initially to show that values remain consistent over time. Impedance values of water and 1% wt. saltwater were compared to show that the device is able to detect changes in impedance, with up to a 60% reduction in electrical impedance in saltwater. Cells were introduced into the device, where changes in impedance were seen across multiple frequencies, indicating that the device is capable of detecting the presence of biologic elements within a system. Cell measurements were performed using NIH-3T3 fibroblasts.
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Books on the topic "Impedance"

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Barsoukov, Evgenij, and J. Ross Macdonald, eds. Impedance Spectroscopy. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119381860.

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Lvovich, Vadim F. Impedance Spectroscopy. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118164075.

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Adler, Andy, and David Holder. Electrical Impedance Tomography. 2nd ed. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9780429399886.

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Nesterenko, Mikhail V., Victor A. Katrich, Yuriy M. Penkin, Victor M. Dakhov, and Sergey L. Berdnik. Thin Impedance Vibrators. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-7850-9.

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Orazem, Mark E., and Bernard Tribollet. Electrochemical Impedance Spectroscopy. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119363682.

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Cybulski, Gerard. Ambulatory Impedance Cardiography. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11987-3.

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Liu, Hongpeng, Zichao Zhou, Yuhao Li, Wentao Wu, Jiabao Jiang, and Enda Shi. Impedance Source Inverters. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2763-0.

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Orazem, Mark E., and Bernard Tribollet. Electrochemical Impedance Spectroscopy. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470381588.

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Cotrona, Umberto. Understanding impedance measurement. Copenhagen: Oticon, 1989.

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D, Hunter J., and Institution of Electrical Engineers, eds. Microwave impedance measurement. London, UK: P. Peregrinus Ltd on behalf of the Institution of Electrical Engineers, 1985.

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Book chapters on the topic "Impedance"

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Weik, Martin H. "impedance." In Computer Science and Communications Dictionary, 755. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_8687.

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Macdonald, J. Ross, and William B. Johnson. "Fundamentals of Impedance Spectroscopy." In Impedance Spectroscopy, 1–20. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119381860.ch1.

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Raistrick, Ian D., J. Ross Macdonald, and Donald R. Franceschetti. "Theory." In Impedance Spectroscopy, 21–105. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119381860.ch2.

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McKubre, Michael C. H., Digby D. Macdonald, Brian Sayers, and J. Ross Macdonald. "Measuring Techniques and Data Analysis." In Impedance Spectroscopy, 107–74. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119381860.ch3.

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Bonanos, N., B. C. H. Steele, E. P. Butler, J. Ross Macdonald, William B. Johnson, Wayne L. Worrell, Gunnar A. Niklasson, et al. "Applications of Impedance Spectroscopy." In Impedance Spectroscopy, 175–478. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2018. http://dx.doi.org/10.1002/9781119381860.ch4.

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Cybulski, Gerard. "Impedance Cardiography." In Ambulatory Impedance Cardiography, 7–37. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-11987-3_2.

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Dhillon, Ramindar S., and James W. Fairley. "Impedance audiometry." In Multiple-choice Questions in Otolaryngology, 28. London: Palgrave Macmillan UK, 1989. http://dx.doi.org/10.1007/978-1-349-10805-3_41.

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Min, Mart, Toomas Parve, and Uwe F. Pliquett. "Impedance Detection." In Encyclopedia of Microfluidics and Nanofluidics, 1338–61. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-5491-5_1783.

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Navajas, D., R. Farre, and M. Rotger. "Respiratory Impedance." In Update in Intensive Care and Emergency Medicine, 99–113. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/978-3-642-84209-2_9.

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Duan, Chunjie, Brock J. LaMeres, and Sunil P. Khatri. "Impedance Compensation." In On and Off-Chip Crosstalk Avoidance in VLSI Design, 201–18. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-0947-3_15.

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Conference papers on the topic "Impedance"

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Cortesa˜o, Rui, Brian Zenowich, Rui Arau´jo, and William Townsend. "Robotic Comanipulation With Active Impedance Control." In ASME-AFM 2009 World Conference on Innovative Virtual Reality. ASMEDC, 2009. http://dx.doi.org/10.1115/winvr2009-724.

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The paper presents active impedance control for robotic comanipulation tasks, enabling virtual contact interactions. Computed torque control in the task space powered by multiple-output active observers (AOBs) is proposed, enhancing haptic perception. Forces and force derivatives are artificially measured from position data around an equilibrium point that can move with time. Control techniques to deal with critical impedances are introduced, taking into account the noise distribution along the system. Stochastic design is discussed. A dynamic model of the redundant lightweight 7-DOF WAM™ arm is derived and evaluated, playing a key role in the control design. Experiments for small and high impedances are presented, highlighting merits and limitations of the approach. A comparative study between active and non-active impedance control is made.
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Scandurra, Graziella, Carmine Ciofi, Emanuele Cardillo, and Luigi Ferro. "Portable Impedance Meter for Focused Impedance Applications." In 2023 International Workshop on Impedance Spectroscopy (IWIS). IEEE, 2023. http://dx.doi.org/10.1109/iwis61214.2023.10302766.

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Cheong, S. H., S. H. Ro, and A. M. Al-Jumaily. "How the Input Impedance Relates to Airway Characteristics." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-43283.

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To understand how the input impedance determined at the throat correlates with changes in the dynamic characteristics of the airways, a simplified 5-lobe model is developed and simulated. The model takes into account some realistic conditions such as varying cross-sectional areas, flexible wall properties and branching. The lobe terminal impedances are implemented in the model to predict the input impedance at the throat. The effects of airway constrictions and wall eleatance variations on this impedance are determined for a range of frequencies. It is concluded that the developed model is capable of predicting various physiological changes in the airway passages.
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Han, Taehee, Tessa A. Haagenson, Hossein Salehfar, Samir Dahal, and Mike D. Mann. "An Efficient Approximation Method for an Individual Fuel Cell Impedance Characterization." In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33345.

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In this study, an efficient method of approximating individual fuel cell impedances in a stack is proposed and experimentally verified. Two different proton exchange membrane (PEM) fuel cell stacks (600 W with 24 cells and 1.2 kW with 47 cells) were used to develop and verify the method. Both PEM fuel cell stacks were operated using room air and pure hydrogen (99.999%). Impedance and current - voltage (I-V) data were collected for stack and individual cell levels under various operating conditions. The experimental result shows that the individual cell impedance is directly proportional to the corresponding cell voltage. Therefore individual cell impedance can be accurately estimated by performing only stack impedance and individual cell voltage measurements.
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Chukwu, Richard, John Mugisa, Doriano Brogioli, and Fabio La Mantia. "Dynamic Impedance Spectroscopy: Fitting Multivariate Impedance Spectra using B-Spline Basis." In 2023 International Workshop on Impedance Spectroscopy (IWIS). IEEE, 2023. http://dx.doi.org/10.1109/iwis61214.2023.10302759.

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Langkowski, Hauke, Trung Do Thanh, Michael Jordan, and Detlef Schulz. "Grid impedance identification considering the influence of coupling impedances." In 2010 IEEE International Symposium on Industrial Electronics (ISIE 2010). IEEE, 2010. http://dx.doi.org/10.1109/isie.2010.5637520.

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Zaikou, Yahor, Thomas Nacke, and Uwe Pliquett. "High Frequency Impedance Spectroscopy for Biotechnological Applications." In 2021 International Workshop on Impedance Spectroscopy (IWIS). IEEE, 2021. http://dx.doi.org/10.1109/iwis54661.2021.9711786.

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Wilkes, Jason C., and Dara W. Childs. "Improving Tilting-Pad Journal Bearing Predictions: Part I—Model Development and Impact of Rotor-Excited Versus Bearing-Excited Impedance Coefficients." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69804.

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The floating-bearing-test-rig concept was initially developed by Glienicke in 1966 and has since been used to test many tilting-pad journal bearings (TPJBs). The impedances measured during these tests have been compared to rotor/journal perturbed impedance predictions. Since the inertial acceleration of a pad is different for bearing perturbed and rotor perturbed motions, the bearing’s reaction force components for bearing perturbed and journal perturbed motions will also differ. An understanding of how bearing perturbed and rotor perturbed impedances differ is needed to assess the validity of past, present, and future comparisons between TPJB test data and predictions. A new TPJB perturbation model is developed including the effects of angular, radial, and transverse pad motion and changes in pad clearance due to pad bending compliance. Though all of these pad variables have previously been included in different analyses, there are no publications containing perturbations of all four variables. In addition, previous researchers have only perturbed the rotor, while both the bearing and rotor motions are perturbed in the present analysis. The applicability of comparing rotor-perturbed bearing impedance predictions to impedances measured on a bearing-perturbed test rig is assessed by comparing rotor perturbed and bearing perturbed impedance predictions for an example bearing.
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Palafox, Luis, Ralf Behr, Jaani Nissila, Jurgen Schurr, and Bryan P. Kibble. "Josephson impedance bridges as universal impedance comparators." In 2012 Conference on Precision Electromagnetic Measurements (CPEM 2012). IEEE, 2012. http://dx.doi.org/10.1109/cpem.2012.6251004.

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Posner, Lucas, Florian Wilhelmy, Sebastian Wegner, Sophie Muller, Uwe Pliquett, Thomas R. Knosche, Konstantin Weise, and Dirk Lindner. "Effect of Contact Pressure on Porcine Postmortem Brain Tissue Impedance." In 2022 International Workshop on Impedance Spectroscopy (IWIS). IEEE, 2022. http://dx.doi.org/10.1109/iwis57888.2022.9975122.

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Reports on the topic "Impedance"

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Mane, Vibha. Collimator Impedance. Office of Scientific and Technical Information (OSTI), April 1998. http://dx.doi.org/10.2172/1119542.

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Mccrady, Rodney Craig. Transverse Impedance. Office of Scientific and Technical Information (OSTI), June 2019. http://dx.doi.org/10.2172/1526919.

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Chou, W. Negative transverse impedance. Office of Scientific and Technical Information (OSTI), June 1989. http://dx.doi.org/10.2172/377698.

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Mane, Vibha. Beam Dump Impedance. Office of Scientific and Technical Information (OSTI), June 1995. http://dx.doi.org/10.2172/1119455.

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Stupakov, Gennady. Wake and Impedance. Office of Scientific and Technical Information (OSTI), October 2000. http://dx.doi.org/10.2172/784754.

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Stupakov, Gennady. Surface Roughness Impedance. Office of Scientific and Technical Information (OSTI), December 2000. http://dx.doi.org/10.2172/784801.

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Stupakov, Gennady. Surface Roughness Impedance. Office of Scientific and Technical Information (OSTI), December 2000. http://dx.doi.org/10.2172/784831.

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Kabakian, Adour. Tensor Impedance Surfaces. Fort Belvoir, VA: Defense Technical Information Center, November 2010. http://dx.doi.org/10.21236/ada566251.

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Yakovlev, Vyacheslav. Transverse impedance definitions. Office of Scientific and Technical Information (OSTI), September 2023. http://dx.doi.org/10.2172/1999247.

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Song, J. J. Experimental study of coupling impedance: Part I longitudinal impedance measurement techniques. Office of Scientific and Technical Information (OSTI), October 1991. http://dx.doi.org/10.2172/90668.

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