Relevant bibliographies by topics / Magnetický

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Magnetický'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Magnetický"

1

Wang, Xiao Yu, Jing Jing Wu, Zhen Yuan Jia, and Xiao Dong Tan. "Mechanical and Magnetic Analysis of Giant Magnetostrictive Transducer." Applied Mechanics and Materials 79 (July 2011): 166–71. http://dx.doi.org/10.4028/www.scientific.net/amm.79.166.

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The giant magnetostrictive transducer is a prospective kind of transducer for precession position and actuator utilization. The transducer design need cooperated with the mechanics, electrics and magnetics knowledge. It designs the giant magnetostrictive transducer and employed the finite element method to simulate and analysis the transducer’s prestress mechanism and modal analysis, Meanwhile, It uses the Ansoft software simulated and calculated the electrical and magnetical performance of the designed transducer. It presents the calculating method of the actuator’s mechanical, magnetic and thermal system, and utilizes the finite element method to analysis the actuator’s prestress mechanism, modal mode, permanent and electromagnetic magnetic circuit. The simulation results verified the design is reasonable and effective. The discussion of the model, analysis and simulation method of the transducer can direct the future transducer design and manufacture.
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Tanauma, Adey, and Ferdy Ferdy. "POTENSI SUMBERDAYA ALAM PASIR BESIPANTAI ARAKAN KABUPATEN MINAHASA SELATAN." JURNAL ILMIAH SAINS 15, no. 1 (October 31, 2011): 225. http://dx.doi.org/10.35799/jis.11.2.2011.211.

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POTENSI SUMBERDAYA ALAM PASIR BESIPANTAI ARAKAN KABUPATEN MINAHASA SELATAN Adey Tanauma1) dan Ferdy1) 1)Program Studi Fisika FMIPA Universitas Sam Ratulangi, Manado 95115 ABSTRAK Pasir besi merupakan salah satu sumberdaya alam di Sulawesi Utara yang belum dimanfaatkan secara optimal. Salah satu lokasi yang cukup potensial untuk mendapatkan endapan pasir besi ini adalah pesisir pantai Arakan. Penelitian ini bertujuan untuk menentukan sifat-sifat magnetik endapan pasir besi yang terdapat di pesisir Pantai Arakan kabupaten Minahasa Selatan Provinsi Sulawesi Utara. Suseptibilitas magnetik dan magnetisasi saturasi sampel pasir besi Arakan mengindikasikan bahwa kandungan mineral magnetik yang dominan adalah magnetite. Ukuran bulir dari mineral magnetik terutama magnetite didominasi oleh bulir-bulir magnetik berukuran besar atau bulir magnetik dengan domain magnetik antara pseudosingle domain dan multi domain. Tingginya kandungan mineral magnetik berdasarkan nilai karakterisasinya, terutama nilai suseptibilitas magnetik memberikan peluang untuk pemanfaatan lebih lanjut dari sumberdaya alam ini. Kata kunci: histeresis magnetik, pasir besi, suseptibilitas THE POTENTIAL OF NATURAL RESOURCES OF IRON SAND IN ARAKAN COASTAL SUBPROVINCE OF SOUTH MINAHASA ABSTRACT Iron sand represent one of the natural resources in North Sulawesi which not yet been exploited in optimally. One of the location which quite potential to get this iron sand sediment is coastal area of Arakan. This research aim to determine the nature of magnetic of iron sand sediment which there are in coastal area of Arakan, Sub-province of South Minahasa, Province of North Sulawesi. Magnetic suseptibility and saturation magnetization of iron sand sampel of Arakan indicated that dominant magnetic mineral is magnetite. Seed size measure of magnetic mineral especially magnetite predominated by big sized magnetic seeds or magnetic seed with magnetic domain between domain pseudosingle and multi domain. The height content of magnetic mineral based on characteristic value, especially magnetic suseptibility give the opportunity for furthermore exploiting of this natural resources. Keywords : magnetic hysteresis, iron sand, suseptibility
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Kahar, Gertrudis V., Abdul Wahid, and Hadi Imam Sutaji. "ANALISIS KEJADIAN BADAI MAGNETIK BERDASARKAN DATA VARIASI HARIAN MAGNETIK DI KOTA KUPANG." Jurnal Fisika : Fisika Sains dan Aplikasinya 3, no. 1 (December 16, 2018): 12–20. http://dx.doi.org/10.35508/fisa.v3i1.589.

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ABSTRAK Telah dilakukan penelitian analisis kejadian badai magnetik di Kota Kupang bulan Oktober 2014 sampai bulan September 2016. Penelitian ini bertujuan untuk menentukan karateristik kejadian badai magnetik serta menentukan periode kemunculan badai magnetik di Kota Kupang. Pengolahan data dengan menggunakan Software Microsoft Excel untuk dibuat grafik data komponen magnet bumi terhadap waktu dan Software Matlab 2011 untuk penentuan periodesitas kejadian badai magnetik menggunakan transformasi fourier cepat (FFT). Berdasarkan hasil pengolahan data, karateristik kejadian badai magnetik yang terdapat di daerah penelitian untuk bulan Oktober 2014 sampai September 2016 adalah untuk tingkat aktivitas gangguan magnetik maksimum ditandai dengan nilai K indeks=8, A indeks=54.875 dan penurunan nilai Dst= -121 nT, sehingga dikategorikan badai menengah dan tingkat aktivitas gangguan magnetik minimum ditandai dengan nilai K indeks=3, A indeks=11.5 serta penurunan nilai Dst = -17 nT, sehingga dikategorikan relatif tenang. Periode kemunculan aktivitas magnetik bulan Oktober 2014-September 2016 adalah berada dalam periode satu harian sampai sepuluh harian. Kata kunci : Variasi harian magnetik, badai magnetik, periodesitas, K indeks, A indeks. ABSTRACT The research about analysis of magnetic storm events in Kupang City from October 2014 to September 2016 has been done. The purpose of this study is to determine the characteristic of storm events and the period of emergence magnetic storm from Kupang City. The data used is the daily magnetic variation data obtained from Meteorogical Climatological and Geophysical Agency in Kupang City. The data processing using by Microsoft Excel software to create graph data of the earth magnetic components against time and Matlab 2011 sofware to determining the periodicity of magnetic storm events using Fast Fourier Transform (FFT). From the results of data processing, the characteristic of magnetic storm events in the study area from October 2014 to September 2016 were for the maximum magnetic interference activity level occurring on june 22th, 2015 due to burst of CME marked by the value of K index = 8, A index = 54.875 and degradation value of DST = -121 nT, so category middle storm and minimum magnetic interference activity level occurred on February 10th, 2015 due to burst of CME and flare marked with value K index = 3, A index =11.5, and decreasing value of DST =-17 nT, thus categorized relatively quietly. The period of occurrence magnetic activity from October 2014 to September 2016 is within a period of one daily to ten daily. Keywords : Daily magnetic variation, magnetic storm, K index, A index.
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Naibaho, Tommy, and Lukman Arifin. "VERIFIKASI LITOLOGI TERHADAP NILAI KERENTANAN MAGNETIK DI PERAIRAN BANGKA BELITUNG." JURNAL GEOLOGI KELAUTAN 8, no. 1 (February 16, 2016): 37. http://dx.doi.org/10.32693/jgk.8.1.2010.184.

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Peta anomali magnetik menunjukkan bahwa perairan Bangka Belitung dicirikan oleh pasangan tinggian dan rendahan panjang gelombang anomali dengan amplitudo -200 nT—500nT. Sedangkan dari peta distribusi kerentanan magnetik, tinggian magnetik Belitung dibatasi oleh nilai kerentanan magnetik antara 0,001 cgs unit dan 0,003 cgs unit. Anomali positip rendah dicirikan oleh nilai kerentanan magnetik batuan antara 0,001-0,003 cgs unit merupakan benda intrusif bawah laut yang diduga berupa pluton granitik jenis granit-biotit yang berasosiasi dengan mineral kasiterit. Pluton granitik tersebut sama seperti granit yang berafiliasi dengan endapan timah di daratan Pulau Belitung. Misalnya singkapan granit yang terdapat di sekitar pantai Gembira yang menunjukkan tipe granit biotit porfiritik dengan fenokris ortoklas. Kata Kunci: anomali magnetik, kerentanan magnetik, granit, Bangka Belitung Magnetic anomaly map shows that the Bangka Belitung waters are characterized by a pair of hight and low long-wave amplitude anomalies values of -200 nT—500 nT. While the distribution map of magnetic susceptibility magnetic high of Belitung is limited magnetic susceptibility values of 0.001 cgs units and 0.003 cgs units. Positive anomaly of low magnetic is characterized susceptibility values between 0.001 to 0.003 cgs units suggested as a body of submerged intrusive rock body granitic plutons of granite biotite type associated with casiterite mineral. Granitic plutons are the same as granite affiliated with tin deposits in the mainland island of Belitung. For example there are granite outcrops around the Gembira coast that shows the type of porphyritic biotite granite with phenocrysts ortoclas. Keywords: Magnetic anomaly, magnetic susceptibility, granite, Bangka Belitung
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Shang Sun, Shang Sun, Chen Zhang Chen Zhang, Haitao Zhang Haitao Zhang, Yisheng Gao Yisheng Gao, Ningbo Yi Ningbo Yi, Qinghai Song Qinghai Song, and Shumin Xiao Shumin Xiao. "Enhancing magnetic dipole emission with magnetic metamaterials." Chinese Optics Letters 16, no. 5 (2018): 050008. http://dx.doi.org/10.3788/col201816.050008.

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Mahmudi, Dinni, Muhammad Isa, and Didik Sugiyanto. "Interpretation of Near Surface Based on the Magnetic Data at Geothermal Area, Jaboi, Sabang." Journal of Aceh Physics Society 8, no. 3 (September 25, 2019): 90–93. http://dx.doi.org/10.24815/jacps.v8i3.14550.

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Telah dilakukan penelitian geofisika menggunakan metode magnetik untuk mendapatkan struktur bawah permukaan di daerah prospek panas bumi Jaboi, Sukajaya, Kota Sabang. Pengukuran medan magnetik total dilakukan pada 40 titik menggunakan Proton Precession Magnetometer (PPM). Daerah Jaboi memiliki sudut inkinasi -4.416 dan deklinasi -0.875 dengan nilai medan magnetik total berkisar antara 41550 hingga 42600 nT. Untuk mendapatkan nilai anomali magnetik dilakukan koreksi diurnal dan koreksi IGRF (International Geomagnetic Reference Field). Setelah koreksi dilakukan diperoleh nilai anomali magnetik daerah panas bumi Jaboi antara -200 nT sampai dengan -950 nT. Selanjutnya hasil anomali magnetik ini digunakan dalam memodelkan struktur bawah permukaan dengan panjang lintasan 1800 m dari Tenggara-Barat Laut. Berdasarkan interpretasi data anomali magnetik menunjukkan daerah penelitian didominasi oleh anomali rendah yang berarti daerah manifestasi panas bumi. Interpretasi anomali tinggi dan rendah menunjukkan adanya patahan yang diduga sebagai patahan Ceuneuhot. Dari hasil pemodelan 2D menggunakan software Mag2DC, menunjukkan bahwa terdapat 5 lapisan dengan kedalaman 0 - 1000 m. Lapisan-lapisan ini adalah soil ( = 0,00 x 10-6 SI), andesit terubah ( = 13,408 x 10-6 SI), breksi tufa terubah ( = 12,686 x 10-6 SI), andesit terubah ( = 13,423 x 10-6 SI) dan breksi andesit ( = 13,535 x 10-6 SI). Melalui pemodelan ini diyakini zona patahan adalah patahan Ceuneuhot. Geophysical reasearch by using magnetic method was done in order to obtain subsurface structure of geothermal prospect area Jaboi, Sukajaya, Sabang City. The measurement of total magnetic field was taken at 40 points using Proton Precession Magnetometer (PPM). Jaboi area has an inklination angle -4.416 and declination angle -0.875 which has total magnetic field range between 41550 to 42600 nT. Diurnal Correction and IGRF (International Geomagnetic Reference Field) correction was used to obtain magnetic anomalies. The values of magnetic anomalies in Jaboi Geothermal Area is -200 to -950 nT. The result of magnetic anomalies was used to modelled the subsurface structure with profile distance is about 1800 m from Southeast to Northwest. Based on the magnetic anomalies data, the reaserch area dominated by low anomalies that indicated geothermal manifestation area. High and low magnetic anomalies indicated a fault that estimated as Ceuneuhot fault. From the result of 2D modelling using software Mag2DC, showed that the research area consist of 5 subsurface structure from 0 – 1000 m depth. The layers are soil ( = 0.00 × 10-6 SI), altered andesite ( = 13.408 × 10-6 SI), altered breccia-tuff ( = 12.686 × 10-6 SI), altered andesite ( = 13.423 × 10-6 SI), and breccia-andesite ( = 13.535 × 10-6 SI). Also from the model was obtained the Ceuneuhot fault zone. Keywords: Magnetik, Anomali Magnetik, Struktur Bawah Permukaan, Panas Bumi
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Bohatá, Šárka. "The significance of magnetic resonance imaging rectal cancer." Onkologie 11, no. 2 (May 1, 2017): 61–65. http://dx.doi.org/10.36290/xon.2017.013.

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Gao, Shengwei, Hao Wang, and Kishor Tarafdar. "Phase shift control dual active bridge converter with integrated magnetics." Journal of Computational Methods in Sciences and Engineering 20, no. 3 (September 30, 2020): 727–42. http://dx.doi.org/10.3233/jcm-204132.

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Traditional dual active bridge converters use transformer leakage inductance instead of energy storage inductors for magnetic integration, but this method cannot accurately control the leakage inductance. A phase shift control dual active bridge converter base on integrated magnetics is proposed, in which one transformer and one inductor are integrated in an EE core. The size of the inductance can be accurately controlled. The transformer and the inductor are decoupled and integrated so that the two operating states do not affect each other. The weight and volume of the magnetic elements are reduced accordingly. The finite element analysis and magnetic circuit simulation of the integrated magnetics are carried out. Finally, the integrated magnetics are designed and applied to the 600W prototype to realize bidirectional power transmission and a weight reduction is about 36.24% and a volume reduction is about 35.84%. The correctness of the design is verified by experimental results.
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Firmansyah, Fikri, and Arif Budiman. "Pendugaan Mineralisasi Emas Menggunakan Metode Magnetik di Nagari Lubuk Gadang Kecamatan Sangir, Solok Selatan, Sumatera Barat." Jurnal Fisika Unand 8, no. 1 (January 2, 2019): 77–83. http://dx.doi.org/10.25077/jfu.8.1.77-83.2019.

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Telah dilakukan penelitian tentang pendugaan mineralisasi emas di Nagari Lubuk Gadang, Kecamatan Sangir, Solok Selatan, Sumatera Barat. Penelitian ini menggunakan metode magnetik dengan tahapan yaitu akuisisi data lapangan, pengolahan data dan interpretasi data. Alat yang digunakan adalah Earth Magnetometer EM2 (Microteslas) AlphaLab.Inc. Perangkat lunak yang digunakan untuk membuat peta kontur adalah software Surfer 11 dan pemodelan 2D menggunakan software Mag2dc. Pengukuran medan magnetik dilakukan pada 50 titik pengamatan dengan luas daerah 670 m2. Hasil penelitian menunjukkan bahwa ditemukan mineral pembawa emas yaitu pirit dengan suseptibilitas magnetik 0.000035 – 0.005 SI, kalkopirit dengan suseptibilitas magnetik 0.000023 – 0.0004 SI, troilit dengan suseptibilitas magnetic 0.00061 – 0.0017 SI, pirhotit dengan suseptibilitas magnetik 0.00046 – 1.4 SI, dan siderit dengan suseptibilitas magnetik 0.0013 – 0.011 SI merupakan mineral sulfida magmatik yang terdapat dalam batuan metamorf dan sedimen. Disamping itu mineral emas juga berasosiasi dengan mineral magnetic yaitu batuan beku (intrusi) yaitu porfiri dengan suseptibilitas magnetik 0.00025 – 0.21 SI. Zona mineralisasi emas diperkirakan terletak pada kedalaman 5 meter sampai dengan 35 meter di bawah permukaan tanah.Kata kunci: Metode magnetik, mineralisasi emas, suseptibilitas.
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Amiri Roodan, Venoos, Jenifer Gómez-Pastora, Ioannis H. Karampelas, Cristina González-Fernández, Eugenio Bringas, Inmaculada Ortiz, Jeffrey J. Chalmers, Edward P. Furlani, and Mark T. Swihart. "Formation and manipulation of ferrofluid droplets with magnetic fields in a microdevice: a numerical parametric study." Soft Matter 16, no. 41 (2020): 9506–18. http://dx.doi.org/10.1039/d0sm01426e.

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Integrated computational fluid dynamics and magnetics simulation is employed to analyze the effects of magnetic force on the formation and manipulation of ferrofluid droplets within a flowing non-magnetic continuous phase in a microfluidic device.
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Dissertations / Theses on the topic "Magnetický"

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Kopecký, Ivo. "Rozptylové ztráty v magnetických materiálech na konci statorového svazku." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218779.

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This thesis examines the magnetic field and magnetic flow at the end of the stator synchronous machine. This problem is solid using nonlinear magnetic resistive network, which is simulating by PSpice software. A simple model of stator, consisting of stator plates, air gaps and the two-thumbs, which hold the stator together. All of this is replace magnetic nonlinear resistive network, which is then divided into elements. According to these element is a simplified model solid and analyzed.
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Staňo, Michal. "Charakterizace magnetických nanostruktur pomocí mikroskopie magnetických sil." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231312.

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The thesis deals with magnetic force microscopy of soft magnetic nanostructures, mainly NiFe nanowires and thin-film elements such as discs. The thesis covers almost all aspects related to this technique - i.e. from preparation of magnetic probes and magnetic nanowires, through the measurement itself to micromagnetic simulations of the investigated samples. We observed the cores of magnetic vortices, tiny objects, both with commercial and our home-coated probes. Even domain walls in nanowires 50 nm in diameter were captured with this technique. We prepared functional probes with various magnetic coatings: hard magnetic Co, CoCr and soft NiFe. Hard probes give better signal, whereas the soft ones are more suitable for the measurement of soft magnetic structures as they do not influence significantly the imaged sample. Our probes are at least comparable with the standard commercial probes. The simulations are in most cases in a good agreement with the measurement and the theory. Further, we present our preliminary results of the probe-sample interaction modelling, which can be exploited for the simulation of magnetic force microscopy image even in the case of probe induced perturbations of the sample.
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Ježek, Jaroslav. "Fluxmetr s grafickým zobrazením B-H křivky." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218264.

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This work deals with simple fluxmeter which is able, together with other device, to show hysteresis loop. Hysteresis loop is a graphic expression of dependence of magnetic induction on intensity of magnetic field. Oscilloscope is used to display the hysteresis loop. This device is fully sufficient for the display. The measured objects are solenoids from various kinds of materials with the same shape. The main aim of this work is the design, realization and description of the fluxmeter. The fluxmeter consists of several partial blocks. The first one, on which this work is focused, is signal generator which is able to generace different kinds of signal. The generated signal comes on primary winding of solenoid where a magnetic field on a given intensity rises. An amplifier is used to obtain the sufficient intensity. Next thing this work is focused on is the design of the integrator which is necessary for the correct function of the fluxmeter. As suggested, there is shown the block diagram of linking of individual parts. There are described the measured results at the end of this work.
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Jirásek, Tomáš. "Výpočet přídavných ztrát asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220098.

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The main goal of this thesis is a determination of an idle stray losses in induction machine and creation calculation program in MATLAB. The stray losses are caused especially by the eddy currents on the surface of stator and rotor, further by a pulsation of these currents owing to the periodical change of air-gap permeance, magnetic induction in stator and rotor teeth and a differential leakage. Value of stray losses are different of engine construction especially by it are scoring insulated, uninsulated, straight or slant.
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Donát, Martin. "Komplexní analýza modálních vlastností elektrických strojů točivých." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-234347.

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This dissertation thesis deals with the computational modelling of the dynamic response of the rotating electrical machine structure on the application of the magnetic forces. Apart from the dynamic response of the ideal symmetrical machine, the influence of the air gap eccentricity on the dynamics response is studied in this work. A basic type of the air gap eccentricity, which is caused by eccentric mounting of the rotor pack on the shaft of the rotor, is considered. The calculations the dependence of the magnetic forces on the time and a misalignment of the rotor pack are performed as first. The computational model of the magnetic field of the rotating electrical machine, which is based on solution of the electromagnetic coupled field analysis by finite element method, is used for this purpose. An analysis of the influence of the unbalanced magnetic pull and the stiffness of some parts of the machine on the modal properties of the machine is performed in the second part of this thesis. A third part of this thesis is focused on the calculation of the dynamic response of the machine during the steady state operation of the machine and the influence of the rotor pack misalignment on the dynamic response is studied. The obtained results showed that the tangential components of the magnetic forces, which act on the stator pack, excite significant torsional vibration of the stator. Besides the vibration of the stator of the machine, the influence of the rotor pack misalignment on the sound power of the machine, vibration of the rotor, loads of rotor bearings and air gap eccentricity is studied in this thesis.
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Chloupek, Karel. "Program pro výpočet EC motorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217918.

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This thesis focuses on problematics of BLDC motors. Thesis consist of theoretical and practical part. In introduction is the reader acquaint with problematics, principals of development, advantages and disadvantades of BLDC motors. Then folows a description of different types, their realization and construction. Main part of this thesis deals with segment stator. For this type of magnetic circuit was developed computing software. This software will design and provide calculation of motor due to given parameters. In second step, the program generates source code for FEMM software, which provides a simulation. This is the most effective way, how can designer simply verify his calculations
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Kubík, Michal. "Návrh testovacího standu pro stanovení provozních parametrů magnetického hřídelového těsnění." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230462.

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This thesis deals with design of testing stand for operating parameters magnetic seal. In this thesis was done analysis of construction magnetic circuit and analysis of operating parameters. This work contains FEM analysis of magnetic circuit and experimental tune up. The results of this analysis will be used for design magnetic circuit and geometric sensitivity analysis in test stand.
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Starenkova, Anastasiia. "Využití magnetických částic při izolaci DNA z výrobků z obilovin." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376817.

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The thesis has been focused on micro method for isolation of PCR- ready DNA iusing magnetic particles from cereal products. Cereal biscuits and cereal products for babies were selected for the analysis. These were homogenized using plastic copist in lysis buffer with cetyltrimethylammonium bromide (CTAB). The homogenates were purified using chloroform- octanol mixture. The effect of isopropanol in the preparation of homogenates was tested, too. Homogenates were used for DNA isolation by magnetic particles. Two ways to isolate magnetic particles with bounded DNA (magnetic separator and magnetic needle have been tested. Isolated DNA was analyzed spectrophotometrically its concentration and purity were assessed. . After that, amplification of the DNA was tested in PCR. Two sets of primers specific for plant ribosomal DNA were used for their amplification. PCR products of expected length 700 bp and 220 bp were detected by agarose gel electrophoresis. It was shown that DNA isolated from seeds and cereal products using magnetic particles was in PCR-ready quality.
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Balajka, Jan. "Přepínání chirality vortexů v magnetostaticky svázaných permalloyových nanodiscích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230609.

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The diploma thesis is concerned with switching of vortex circulation in magnetic nanodisks. The results of micromagnetic simulations of hysteresis loops of individual disks with different degrees of asymmetry are presented. The influence of geometric asymmetry of the disk on the shape of the hysteresis loop is discussed as well as switching of vortex circulation in asymmetric nanodisks by external in-plane magnetic field. Simulations of pairs of magnetostatically coupled nanodisks were carried out for different interdisk distances and degrees of asymmetry. By analysing the results of the simulations, the effects of magnetostatic coupling and the asymmetry on resultant circulation of individual vortices were compared and the range of magnetostatic interaction between nanodisks of given dimensions and asymmetry was estimated. Experimental techniques used for fabrication and measurement of the samples are briefly summarized.
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Hladík, Lukáš. "Přepínání spinových vortexů v magnetických nanodiscích." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230257.

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The diploma thesis deals with the switching of spin vortices in magnetic nanodisks. First, the basic concepts of (micro)magnetism are defined and existing theoretical and experimental achievements in the field of switching of the two basic characteristics (chirality and polarity) of magnetic vortex are summarized. Then the principle of dynamic switching of magnetic vortex chirality using in-plane magnetic field pulse with a well defined amplitude and duration is presented. There is no need to use a certain shape of nanodisks or asymmetry in magnetic field distribution. Nanostructures were prepared by the multi-step electron beam lithography and ion beam sputtering. Individual steps of sample preparation and optimization for the magnetization dynamics measurements are described. Finally, the experimental measurements of the dynamic switching of chirality on prepared samples obtained by transmission x-ray microscopy at the synchrotron Advanced Light Source at Berkeley, USA are presented and discussed.
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Books on the topic "Magnetický"

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Monegro, Dr Francisco. Bio-Magnetic Medicine/Medicina Bio-Magnetica: Poderes y secretos de la energia magnetica. New York: NY Institute for Holistic Life, 1996.

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International, Conference on Megagauss Magnetic Field Generation and Related Topics (7th 1996 Sarov Russia). Book of abstracts: Seventh International Conference on Megagauss Magnetic Field Generation and Related Topics, Sarov (Arzamas-16), August 5-10, 1996. Sarov: Russian Federal Nuclear Center-All-Russian Scientific Research Institute of Experimental Physics, 1996.

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Payne, Buryl. Magnetic healing: Advanced techniques for the application of magnetic forces. Twin Lakes, WI: Lotus Light Pub., 1997.

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Rostock, Germany) International Conference on the Scientific and Clinical Applications of Magnetic Carriers (8th 2010. 8th International Conference on the Scientific and Clinical Applications of Magnetic Carriers: Rostock, Germany, 25-29 May 2010. Melville, N.Y: American Institute of Physics, 2010.

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Wetton, Edgar. The magneticon. [S.l: s.n., 1986.

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Vránová, Gabriela. Magnetický vítr. Plzeň: NAVA, 1994.

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Joint Magnetism and Magnetic Materials - Intermag Conference (6th 1994 Albuquerque, NM, USA). Sixth Joint Magnetism and Magnetic Materials - International Magnetics Conference, Albuquerque, New Mexico, June 20-23, 1994. New York: Institute of Electrical and Electronics Engineers, 1994.

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Microwave magnetics. New York: Harper & Row, 1985.

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Sykulski, J. K. Computational magnetics. Dordrecht: Springer Science+Business Media, 1995.

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Sykulski, Jan K., ed. Computational Magnetics. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1278-9.

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Book chapters on the topic "Magnetický"

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Lohr, D. A., L. J. Zanetti, B. J. Anderson, T. A. Potemra, J. R. Hayes, R. E. Gold, R. M. Henshaw, et al. "Near Magnetic Field Investigation, Instrumentation, Spacecraft Magnetics and Data Access." In The Near Earth Asteroid Rendezvous Mission, 255–81. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5200-6_6.

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Döring, Egon. "Magnetika." In Handbuch Elektrotechnik, 285–92. Wiesbaden: Springer Fachmedien Wiesbaden, 2016. http://dx.doi.org/10.1007/978-3-658-07049-6_22.

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Döring, Egon. "Magnetika." In Werkstoffkunde der Elektrotechnik, 122–74. Wiesbaden: Vieweg+Teubner Verlag, 1988. http://dx.doi.org/10.1007/978-3-663-13879-2_6.

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Turowski, Janusz. "Reluctance Networks." In Computational Magnetics, 145–78. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1278-9_4.

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Sykulski, Jan K., and Richard L. Stoll. "A Brief Review of Magnetic Fields." In Computational Magnetics, 1–34. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1278-9_1.

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Stoll, Richard L., and Kazimierz Zakrzewski. "Finite-Difference Methods." In Computational Magnetics, 35–77. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1278-9_2.

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Sikora, Ryszard. "Finite-Element and Boundary-Element Methods." In Computational Magnetics, 78–144. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1278-9_3.

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Pawluk, Krystyn. "Field Synthesis." In Computational Magnetics, 179–233. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1278-9_5.

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Turowski, Janusz. "Coupled Fields." In Computational Magnetics, 234–84. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1278-9_6.

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Sykulski, Jan K. "Computer Aided Design in Magnetics." In Computational Magnetics, 285–329. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-1278-9_7.

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Conference papers on the topic "Magnetický"

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Inoue, Tsuyoshi, Yukio Ishida, and Tomohiro Sugai. "Vibration of the Vertical Rigid Rotor Supported by a Repulsive-Type Magnetic Bearing: Effects of Both the Axial Displacement and the Magnetical Anisotropicities of Magnets." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35149.

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Magnetic bearing is considered for the usage in various industries. This paper investigates vibration of the rotating shaft supported passively by a repulsive-type magnetic bearing. The permanent magnet on the market not only has strong nonlinear force characteristics, but also may have a few percents of non-uniform magnetization characteristics. Also nonlinear force characteristics change as axial displacement of the shaft. Restoring force of a repulsive-type magnetic bearing is evaluated numerically considering the effects of both the axial displacement of the shaft and the magnetical anisotropicities of the inner and outer magnets. The occurrences of not only the linear and nonlinear parametric characteristics, but also the excitational forces for each pattern of magnetical anisotropicities are observed and they are evaluated in terms of the axial displacement. Furthermore, the influence of each magnetical anisotropicity pattern on the occurrences of various resonance phenomena is clarified.
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Wilson, Mary E., Lina M. González, Warren C. Ruder, and Philip R. LeDuc. "Engineering Magnetic Nanomaterial Production in Magnetotactic Bacteria Through Gene Regulation." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80446.

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Magnetotactic bacteria endogenously synthesize intracellular magnetic nanoparticles (magnetosomes); however, little is known regarding the genetic regulatory networks that control magnetosome production. In this paper, we explore the genetic response of Magnetospirillum magneticum strain AMB-1 to an applied electromagnetic field as a means to identify genes activated by magnetic stimulation. The expression of magnetosome island, flagellar and cytoskeletal genes was found to be differentially altered by magnetic stimulation at short and long times points. These results indicate previously uncharacterized endogenous gene network modules that could be exploited to engineer magnetic bacteria as magnetic nanomaterial producing-machines through gene regulation.
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González, Lina M., Warren C. Ruder, William C. Messner, and Philip R. LeDuc. "Sensing of Local, Highly Concentrated Magnetic Field Gradients in Magnetotactic Bacteria Induces Motility Reversal." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80447.

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Many motile unicellular organisms have evolved specialized behaviors for detecting and responding to chemical gradients (chemotaxis) or oxygen (aerotaxis), while magnetotactic bacteria sense magnetic fields to align their direction of movement. Herein we show that Magnetospirillum magneticum (AMB-1) have the ability to sense and respond not only to the direction of magnetic fields of naturally occurring magnitude, but also to local, highly concentrated magnetic field gradients that do not occur in their natural environment. We imposed these gradients through our system integrating Helmholtz coils and permalloy (Ni80Fe20) microstructures. The AMB-1 exhibit three distinct behaviors as they approached gradients near the microstructures—unidirectional, single direction reversal, and double direction reversal. These results indicate previously unknown capabilities of the magnetic sensing systems of AMB-1.
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Chowdhury, H. A., and A. G. Olabi. "A Finite Element Approach for the Implementation of Magnetostrictive Material Terfenol-D in CNG Fuel Injection Actuation." In ASME 2008 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/detc2008-50017.

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In applications broadly defined for actuation, magnetostrictive materials possess intrinsic rapid response times while providing small and accurate displacements and high-energy efficiency, which are some of the essential parameters for fast control of fuel injector valves for decreased engine emissions and lower fuel consumption. This paper investigates the application of Terfenol-D as a magnetostrictive actuator material for CNG fuel injection actuation. A prototype fuel injector assembly, which includes Terfenol-D as the core actuator material, was modeled in Finite Element Method Magnetics (FEMM) simulation software for 2D magnetics simulation. FEMM was used in order to determine the coil-circuit parameters and the required flux density or applied magnetic field to achieve the desired magnetostrictive strain, and consequently, the injector needle lift. The FEMM magnetic simulation was carried out with four different types of AWG coil wires and four different coil thicknesses of the entire injector assembly in order to evaluate the relationship between the different coil types and thicknesses against the achieved strain or injector lift.
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Ding, Chao, Lanbing Liu, Yunhui Mei, Khai D. T. Ngo, and Guo-Quan Lu. "Magnetic paste as feedstock for additive manufacturing of power magnetics." In 2018 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2018. http://dx.doi.org/10.1109/apec.2018.8341075.

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González, Lina M., Warren C. Ruder, Eli Zenkov, Philip R. LeDuc, and William C. Messner. "Controlling Swimming Magnetotactic Bacteria Through Microfabrication Toward a Non-Destructive Biological Sensor." In ASME 2011 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2011. http://dx.doi.org/10.1115/sbc2011-53336.

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The development of non-destructive sensors is an important direction to pursue to advance approaches, which are less intrusive in their monitoring. One area where significant advances can be made in this field is through using biological inspiration. In this work, we demonstrate the ability of swimming magnetic bacteria, Magnetospirillum magneticum strain AMB-1, to respond to microfabricated magnetic field concentrators. These magnetic bacteria are envisioned as a potential non-destructive sensor approach for detecting defects in submerged metal structures such as ship hulls and bridges. To accomplish this, a pair of Helmholtz coils was built to magnetize microfabricated permalloy (NiFe) structures of different shapes that mimic defects in metals. The NiFe structures were fabricated through photolithography and depositing a thin film of NiFe on a master mold. The substrate was a thin piece of glass (<170μm) that permitted us to observe the interaction of the magnetic bacteria with the NiFe structures that were positioned at the center of the Helmholtz coils. The response of the bacteria around the structures was quantified through analyzing the images of the bacteria in terms of orientation. The bacteria change orientation as they approach the fabricated structures with concentrated fields due to their geometries. In addition, we used magnetic particles to examine the fields and estimated the local magnetic fields exerted on the particles through calculations involving the forces on the beads. We believe that this work is important in a variety of areas from bacterial mechanics to synthetic biology to aqueous non-destructive sensors.
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Wilt, Michael, Jiuping Chen, David Alumbaugh, and Amir Rahmani. "Dipole magnetics: Using low frequency controlled-source EM to map magnetic anomalies." In SEG Technical Program Expanded Abstracts 2013. Society of Exploration Geophysicists, 2013. http://dx.doi.org/10.1190/segam2013-0146.1.

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Feng, Qingshan, Jeff Sutherland, Bill Gu, Yao Wei, and Cui Tao. "Evolution of Triax Magnetic Flux Leakage Inspection for Mitigation of Spiral Weld Anomalies." In 2010 8th International Pipeline Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ipc2010-31116.

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With an overall objective for broad and confident integrity management of the PetroChina Pipeline Company’s pipeline network, we illustrate the impact of a collaborative effort between PetroChina and GE Oil & Gas for the inspection and mitigation of spiral weld anomalies, particularly for new advanced assessments of features oriented along and within the spiral weld. Tool configuration, sensor types and the role of novel data analysis techniques including magnetic vector component measurements, is presented as a set to address a broader variety of spiral weld threats, while ensuring a high level of operational robustness and reliability. This paper describes some of the science behind the art, and describes the fundamentals of MFL magnetics and it’s evolution as an ILI technology into the 21st century for spiral weld anomaly inspection.
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MacNeal, B. E., R. H. MacNeal, and R. N. Coppolino. "Spurious modes of electromagnetic vector potential finite elements." In International Magnetics Conference. IEEE, 1989. http://dx.doi.org/10.1109/intmag.1989.690337.

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Takahashi, N., T. Nakata, and N. Uchiyama. "Optimal design method of 3-D nonlinear magnetic circuit by using magnetization integral equation method." In International Magnetics Conference. IEEE, 1989. http://dx.doi.org/10.1109/intmag.1989.690338.

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Reports on the topic "Magnetický"

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Griffin, Stephen M., and L. L. Helms. Sub-Audio Magnetics: Miniature Sensor Technology for Simultaneous Magnetic and Electromagnetic Detection of UXO. Fort Belvoir, VA: Defense Technical Information Center, July 2010. http://dx.doi.org/10.21236/ada578948.

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Branduardi-Raymont, Graziella, and et al. SMILE Definition Study Report. ESA SCI, December 2018. http://dx.doi.org/10.5270/esa.smile.definition_study_report-2018-12.

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The SMILE definition study report describes a novel self-standing mission dedicated to observing solar wind-magnetosphere coupling via simultaneous in situ solar wind/magnetosheath plasma and magnetic field measurements, X-Ray images of the magnetosheath and magnetic cusps, and UV images of global auroral distributions defining system-level consequences. The Solar wind Magnetosphere Ionosphere Link Explorer (SMILE) will complement all solar, solar wind and in situ magnetospheric observations, including both space- and ground-based observatories, to enable the first-ever observations of the full chain of events that drive the Sun-Earth connection.
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Thornell, Travis, Charles Weiss, Sarah Williams, Jennifer Jefcoat, Zackery McClelland, Todd Rushing, and Robert Moser. Magnetorheological composite materials (MRCMs) for instant and adaptable structural control. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38721.

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Magnetic responsive materials can be used in a variety of applications. For structural applications, the ability to create tunable moduli from relatively soft materials with applied electromagnetic stimuli can be advantageous for light-weight protection. This study investigated magnetorheological composite materials involving carbonyl iron particles (CIP) embedded into two different systems. The first material system was a model cementitious system of CIP and kaolinite clay dispersed in mineral oil. The magnetorheological behaviors were investigated by using parallel plates with an attached magnetic accessory to evaluate deformations up to 1 T. The yield stress of these slurries was measured by using rotational and oscillatory experiments and was found to be controllable based on CIP loading and magnetic field strength with yield stresses ranging from 10 to 104 Pa. The second material system utilized a polystyrene-butadiene rubber solvent-cast films with CIP embedded. The flexible matrix can stiffen and become rigid when an external field is applied. For CIP loadings of 8% and 17% vol %, the storage modulus response for each loading stiffened by 22% and 74%, respectively.
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O'Connor, Charles J., Josef Hormes, and Nicolas G. Bazan. Bio-Magnetics Interfacing Concepts: A Microfluidic System Using Magnetic Nanoparticles for Quantitative Detection of Biological Species. Fort Belvoir, VA: Defense Technical Information Center, September 2004. http://dx.doi.org/10.21236/ada426891.

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Cummings, Jeremy T. Magnetic Shielding with Soft Magnetic Alloys. Office of Scientific and Technical Information (OSTI), December 2019. http://dx.doi.org/10.2172/1592859.

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Author, Not Given. Hoosier Magnetics. Office of Scientific and Technical Information (OSTI), September 2015. http://dx.doi.org/10.2172/1332275.

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Burns, L. E. Total field magnetics of selected areas near Ketchikan, southeastern Alaska, Map B - north, Prince of Wales Island (magnetic contours included). Alaska Division of Geological & Geophysical Surveys, 1999. http://dx.doi.org/10.14509/303.

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Burns, L. E. Total field magnetics of selected areas near Ketchikan, southeastern Alaska, Map C - south, Prince of Wales Island (magnetic contours included). Alaska Division of Geological & Geophysical Surveys, 1999. http://dx.doi.org/10.14509/304.

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Jaime, Marcelo. Magnetic Quantum Matter in Extreme Magnetic Fields. Office of Scientific and Technical Information (OSTI), September 2019. http://dx.doi.org/10.2172/1561066.

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Burns, L. E. Total field magnetics of selected areas near Ketchikan, southeastern Alaska, Map D - western and eastern parts, Gravina Island (magnetic contours included). Alaska Division of Geological & Geophysical Surveys, 1999. http://dx.doi.org/10.14509/305.

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