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Journal articles on the topic 'Magnetický'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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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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2

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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3

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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4

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 nTâ€”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 nTâ€”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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6

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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7

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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8

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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9

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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11

Kakar, Satinder, and Anurekha Jain. "Magnetic microspheres." Asian Pacific Journal of Health Sciences 6, no. 1 (March 2019): 81–89. http://dx.doi.org/10.21276/apjhs.2019.6.1.12.

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Sandulyak, Alexander V., Roman Y. Tkachenko, Darya A. Sandulyak, Maria N. Polismakova, Anna A. Sandulyak, and Vera A. Ershova. "Analysis of dependence between magnetic properties of granulated ferromagnetic specimens and relation of its length to diameter." Izmeritel`naya Tekhnika, no. 6 (2020): 46–51. http://dx.doi.org/10.32446/0368-1025it.2020-6-46-51.

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Paper studies the problems about experimental determining magnetic parameters of nonuniform granular magnetics. It has been noted that the existing shortage of direct and (or) indirect experimental data on the magnetic properties of granular ferromagnetic specimens with different values of a relative length, in particular, has a negative impact on the validity of the requirements and decisions to create and ensure the performance of relevant functional elements, movable operating elements of various equipments and devices. By the example of cylindrical specimens of balls with the range of relative length 1–16 within the framework of effective medium macromodel the dependences of induction, magnetic permeability, susceptibility, magnetization and field intensity have been obtained. It has been shown that in the range of field intensity 9–47 kA/m values of induction and magnetization of investigating specimens increase, that indicates the absence of magnetic saturation of such granular (as opposed to solid) magnetics. And this is the case at almost stable values of magnetic susceptibility and permeability. Obtained results are useful in designing movable operating elements of various equipments and devices.

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Cook, Frederick A., John L. Varsek, and Jeffrey B. Thurston. "Tectonic significance of gravity and magnetic variations along the Lithoprobe Southern Canadian Cordillera Transect." Canadian Journal of Earth Sciences 32, no. 10 (October 1, 1995): 1584–610. http://dx.doi.org/10.1139/e95-128.

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Correlation of potential field data to regional geological features within the Lithoprobe southern Canadian Cordillera transect corridor allows characterization of anomaly patterns according to their likely sources. Long-wavelength Bouguer gravity anomalies are attributed to isostatic effects of topography, which in most areas is compensated. Two notable exceptions occur: in the Foreland belt a large positive isostatic anomaly is likely due to mechanical support of topography formed as Cordilleran thrust sheets were emplaced over the thick craton, and on the west coast, isostatic anomalies are related to active subduction. Long-wavelength magnetic anomalies in the Foreland belt are associated with cratonal basement beneath the thrust sheets, and these can be followed westward to near the Omineca belt. A prominent positive magnetic anomaly along the western Coast belt is probably associated with mafic rocks generated during subduction. Elsewhere, relatively short wavelength gravity and magnetic anomalies correlate well with either plutons (both gravity and magnetic), volcanics (primarily magnetics), or faults (magnetics) within the region of accreted terranes.

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Tamuntuan, Gerald, Seni H. J. Tongkukut, and Guntur Pasau. "Analisis Suseptibilitas Dan Histeresis Magnetik Pada Endapan Pasir Besi Di Sulawesi Utara." Jurnal MIPA 6, no. 2 (November 22, 2017): 105. http://dx.doi.org/10.35799/jm.6.2.2017.18008.

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Telah dilakukan pengukuran suseptibilitas dan hysteresis magnetic untuk mengetahui karakteristik magnetic endapan pasir besi pada beberapa lokasi di Sulawesi Utara. Lokasi pengambilan sampel dalam penelitian ini adalah tiga lokasi di pesisir timur semenanjung utara Pulau Sulawesi yaitu daerah Belang, Hais, dan Minanga, serta tiga lokasi di wilayah pesisir barat yaitu daerah Lalow, Inobonto, dan Lolan. Hasil yang diperoleh menunjukkan bahwa nilai suseptibilitas magnetic pada sampel-sampel pasir yang diukur bervariasi dari 7,73 × 10-8 m3kg-1 hingga 436,38 × 10-8 m3kg-1. Pengukuran suseptibilitas magnetik pada empat distribusi ukuran bulir pasir yang berbeda menunjukkan bahwa nilai rata-rata tertinggi suseptibiltas adalah pada pasir berukuran halus (fine grains). Secara umum, pasir besi pada daerah pantai timur semenanjung utara Pulau Sulawesi memiliki nilai suseptibilitas magnetik yang lebih tinggi dibandingkan dengan daerah pantai barat. Konsentrasi mineral superparamagnetik tertinggi berada pada daerah Belang. Mineral magnetik yang dominan dari sampel-sampel pasir besi yang diteliti adalah magnetit dengan domain statepseudo-single domain.Magnetic susceptibility and hysteresis parameters of iron sand deposits at several locations in North Sulawesi have been measuredin order to determine their magnetic characteristics. Samples were taken from six locations which is three locations on the east coast of the northern arm of Sulawesi Island (Belang, Hais and Minanga) and three othersfrom the western coastal areas (Lalow, Inobonto and Lolan).The result shows that magnetic susceptibility of the sand samples vary from 7,73 × 10-8 m3kg-1to 436,38 × 10-8 m3kg-1.Measurement of magnetic susceptibility in four different grain size distributions shows that fine grainsand have the highest susceptibility value.In general, magnetic susceptibility valueof Iron sand samplesfrom the east coast of the northarm of Sulawesi Island was higher than the west coast. Concentration of superparamagnetic mineral from Belang area was higher than other locations. The predominant magnetic minerals of the iron sand samples are magnetite with the domain state pseudo-single domain.

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Putri, Diana, and Afdal Afdal. "Identifikasi Pencemaran Logam Berat dan Hubungannya dengan Suseptibilitas Magnetik pada Sedimen Sungai Batang Ombilin Kota Sawahlunto." Jurnal Fisika Unand 6, no. 4 (October 3, 2017): 341–47. http://dx.doi.org/10.25077/jfu.6.4.341-347.2017.

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Telah dilakukan penelitian untuk menentukan kandungan logam berat dan suseptibilitas magnetik serta hubungan keduanya pada sedimen Sungai Batang Ombilin Kota Sawahlunto. Pengambilan sampel dilakukan pada bulan September 2017 pada 15 titik dengan jarak antar titik adalah 500 meter. Pengukuran suseptibilitas magnetik menggunakan Bartington Magnetic Suseptibility Meter dengan sensor MS2B. Hasil menunjukkan nilai suseptibilitas magnetik sedimen sungai di lokasi penelitian relatif tinggi yaitu berkisar antara 285,71×10-8m3/kg sampai 2664,63×10-8m3/kg. Tingginya Nilai suseptibilitas magnetik disebabkan oleh tingginya kandungan Fe2O3 (5,11%). Sepuluh sampel dipilih untuk dilakukan uji XRF. Konsentrasi rata-rata logam berat pada sedimen Sungai Batang Ombilin sudah melebihi ambang batas yang ditetapkan, yaitu Cr (143 ppm), Mn (1897 ppm), Fe (96181 ppm), Ni (24 ppm), Cu (145 ppm), Zn (343 ppm), As (38 ppm) dan Pb (53 ppm). Hal ini mengindikasikan tingginya tingkat pencemaran logam berat pada sedimen Sungai Batang Ombilin. Nilai suseptibilitas magnetik dan kandungan logam berat memiliki nilai korelasi yang cukup rendah dengan koefisien korelasi -0,46. Hal ini menandakan logam berat tidak berkontribusi besar terhadap nilai suseptibilitas magnetik, melainkan ada faktor lain yang berkontribusi seperti keadaan geologi, sedimentasi dan keberadaan mineral magnetik.Kata kunci: Sedimen sungai, logam berat, suseptibilitas magnetik, Bartington Magnetic Suseptibility Meter sensor MS2B, X-Ray Fluoresence

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Aschermann, Michael. "Use of CT angiography and magnetic resonance imaging in cardiology." Cor et Vasa 50, no. 12 (December 1, 2008): 473–79. http://dx.doi.org/10.33678/cor.2008.172.

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Kudláčková, Šárka, František Záťura, and Zbyněk Tüdös. "MRI targeted triopsy of the prostate - 1st part." Urologie pro praxi 18, no. 2 (May 1, 2017): 69–72. http://dx.doi.org/10.36290/uro.2017.015.

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18

Tupý, Radek. "FUNCTIONAL MAGNETIC RESONANCE IN RELATION TO LANGUAGES CENTERS." Listy klinické logopedie 2, no. 2 (September 30, 2018): 22–26. http://dx.doi.org/10.36833/lkl.2018.021.

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Aneli, Jimsher, Tsisana Gavasheli, Tatiana Gegechkori, and Grigor Mamniashvili. "Self-Assembly Processes of the Magnetic Polymer Nanocomposites in Magnetic Fields." Chemistry & Chemical Technology 13, no. 2 (June 10, 2019): 185–89. http://dx.doi.org/10.23939/chcht13.02.185.

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Wang, Bao Lin, and Yiu Wing Mai. "Near-Tip Fields for Penny-Shaped Cracks in Magnetoelectroelastic Media." Key Engineering Materials 312 (June 2006): 41–46. http://dx.doi.org/10.4028/www.scientific.net/kem.312.41.

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This paper solves the penny-shaped crack configuration in transversely isotropic solids with coupled magneto-electro-elastic properties. The crack plane is coincident with the plane of symmetry such that the resulting elastic, electric and magnetic fields are axially symmetric. The mechanical, electrical and magnetical loads are considered separately. Closed-form expressions for the stresses, electric displacements, and magnetic inductions near the crack frontier are given.

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Farsi, Chouki, Salah Amroune, Mustafa Moussaoui, Barhm Mohamad, and Houria Benkherbache. "High-Gradient Magnetic Separation Method for Weakly Magnetic Particles: an Industrial Application." METALLOFIZIKA I NOVEISHIE TEKHNOLOGII 41, no. 8 (October 25, 2019): 1103–19. http://dx.doi.org/10.15407/mfint.41.08.1103.

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Ivanov, N. V., A. M. Kakurin, and S. V. Konovalov. "MAGNETIC ISLAND DYNAMICS UNDER EXTERNAL MAGNETIC PERTURBATION IN ROTATING RESISTIVE ITER PLASMA." Problems of Atomic Science and Technology, Ser. Thermonuclear Fusion 36, no. 2 (2013): 55–64. http://dx.doi.org/10.21517/0202-3822-2013-36-2-55-64.

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Rahman, Md Arifur. "Analysis of the Formation of Magnetic Transition in Digital Magnetic Recording System." International Journal of Engineering Research 3, no. 2 (February 1, 2014): 83–87. http://dx.doi.org/10.17950/ijer/v3s2/210.

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Ulfanisa, Choirun. "PENERAPAN PEMBELAJARAN PENGAJUAN MASALAH BERBANTUAN PAPAN MAGNETIK UNTUK MENINGKATKAN PEMAHAMAN OPERASI HITUNG BILANGAN BULAT." Jurnal Review Pendidikan Dasar : Jurnal Kajian Pendidikan dan Hasil Penelitian 4, no. 2 (May 11, 2018): 734. http://dx.doi.org/10.26740/jrpd.v4n2.p734-740.

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ABSTRACTThis research is aimed to improve student’s understanding in integer arithmetic operations through the application of learning to use problem posing with magnetic board media in 4th grade student SDN Bangsal 4 Kediri City. This research was conducted in two cycles, cycle I and cycle 2. Each cycle consisted of two meetings which the student’s activity do problem posing with magnetic board. Research data show an increase student’s understanding on integer arithmetic operations. This achievement can be seen from the class average value of the final test cycle I at 76,75 with classical completeness 72,5% and the class average value of final test second cycle of 82,13 with classical completeness 85%. Students response to the problem posing learning with the help of a magnetic board in this research were very positive. This is evident from the results of the student questionnaire consisting of 8 statement and all of them gained very positive criteria of students. Problems were found during a lesson using a problem posing with magnetic board media especially student take a long time to create questions or in examining the matter and the results of the answers that the student. Based on the analysis of data can be concluded that the problem posing learning with the magnetic board media effective to enhance student’s understanding class IV SDN Bangsal 4 Kediri City. Keywords: Problem Posing, Magnetic Board Media, Understanding, Student Response. ABSTRAKPenelitian ini bertujuan untuk meningkatkan pemahaman siswa terhadap operasi hitung bilangan bulat melalui penerapan pembelajaran menggunakan pengajuan masalah dengan media papan magnetik pada siswa kelas IV SDN Bangsal 4 Kota Kediri. Penelitian ini dilaksanakan dalam dua siklus, yaitu siklus I dan siklus II, masing-masing siklus terdiri dari dua pertemuan dimana kegiatan siswa melakukan pengajuan masalah dengan bantuan papan magnetik. Data hasil penelitian menunjukkan adanya peningkatan pemahaman siswa pada operasi hitung bilangan bulat. Pencapaian ini dapat dilihat dari rata-rata kelas nilai tes akhir siklus I sebesar 76,75 dengan ketuntasan klasikal sebesar 72,5% dan rata-rata kelas nilai tes akhir siklus II sebesar 82,13 dengan ketuntasan klasikal sebesar 85%. Respon siswa terhadap pembelajaran dengan model pengajuan masalah dengan bantuan papan magnetik dalam penelitian ini sangat positif. Hal ini terlihat dari hasil angket siswa yang terdiri dari 8 pernyataan dan semuanya memperoleh kriteria sangat positif dari siswa. Kendala yang ditemukan pada saat pembelajaran menggunakan pengajuan masalah dengan media papan magnetik terutama siswa membutuhkan waktu yang lama dalam membuat soal ataupun dalam memeriksa soal dan hasil jawaban yang dibuat siswa. Berdasarkan hasil analisis data, dapat disimpulkan bahwa pembelajaran pengajuan masalah dengan media papan magnetik efektif untuk meningkatkan pemahaman siswa Kelas IV SDN Bangsal 4 Kota Kediri. Kata Kunci: Pembelajaran Pengajuan Masalah, Media Papan Magnetik, Pemahaman, Respon Siswa.

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Fraley, John R., Edgar Cilio, and Bryon Western. "Advanced Applications of High Temperature Magnetics." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2013, HITEN (January 1, 2013): 000046–55. http://dx.doi.org/10.4071/hiten-ma17.

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In recent years, high temperature magnetic structures have been developed and used for inductors and transformers in high temperature applications ranging from power electronics to wireless telemetry systems. Research in the high temperature magnetics field has led to the development of more advanced magnetic structures that can enable diverse applications ranging from regulators to amplifiers, with far reaching implications for the high temperature electronics community. Current high temperature electronics have shown potential in lab and rig tests, but high temperature electronics systems suffer from the relatively limited lifetime of the semiconductor devices themselves. The advanced magnetics discussed in this paper can be designed to have extreme lifetime capabilities even at elevated temperatures, and as such can have an immediate impact on the implementation of true field deployable high temperature electronic systems. Aerospace, power generation, and automotive industries may especially benefit from this technology, as significant advances in health monitoring and active engine control will be enabled by these advanced magnetic structures. A theoretical understanding of these advanced magnetic structures is necessary for initial design and feasibility, while the true development and implementation of this technology depends on state of the art high temperature packaging approaches. By combining high temperature, grain-oriented magnetic materials along with high temperature packaging processes, APEI, Inc. has created advanced high temperature magnetic systems that indicate the technology described in this paper is a viable one, with applications across a wide range of high temperature electronics systems.

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Hairuddin, Khairunnisa, Saiful Amri Mazlan, Ubaidillah, Hairi Zamzuri, and Norazman Mohamad Nor. "A Feasibility Study of Magnetorheological Elastomer Base Isolator." Applied Mechanics and Materials 660 (October 2014): 763–67. http://dx.doi.org/10.4028/www.scientific.net/amm.660.763.

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Magnetorheological elastomer (MRE) is a controllable smart material that demonstrates changes in rheological properties depending on the magnetic field strength. This paper presents thedevelopment of a new concept of MRE isolator in terms of design and magnetic simulation. All features of geometry parameters were considered and altered expeditiously in order to provide ample and uniform magnetic field. Finite Element Method Magnetics (FEMM) was used to design the electromagnetic circuit to generate magnetic fluxes penetrate through the MRE. The study, eventually, leads to the conclusion of different design parameters approach; selection of materials, diameter of the shaft, shape of MRE, length of shaft and thickness of housing.

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Sion, Edward M. "The Low State Temperature Distribution and First Chemical Abundances of White Dwarfs in Polars." International Astronomical Union Colloquium 190 (2004): 2–7. http://dx.doi.org/10.1017/s0252921100001779.

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AbstractDuring the low optical brightness states of AM Her systems (polars) when accretion has declined to a very low value, the underlying magnetic white dwarf photosphere can be modelled without the complication of thermal bremstrahlung and cyclotron emission from the luminous accretion column. The far ultraviolet spectra can be modelled with high gravity Solar composition photospheres. In this way, I present new temperatures and the first chemical abundance estimates for the white dwarfs in three selected polars from the IUE NEWSIPS archive. For the white dwarf in V834 Cen with Teff = 16,000K, Si/H = 0.1 Solar, C/H = 0.5 Solar, for BY Cam, Teff = 17,000K, Si/H = 0.1, C/H = 5 Solar and for RX J1313-32, Teff = 22,000K, Si/H = 0.1 Solar, C/H = 0.1 Solar. The temperature distribution of 24 white dwarfs in polars with known temperatures above and below the period gap is compared with the distribution of the white dwarf temperatures in dwarf novae during quiescence. In both cases, the magnetic white dwarfs in polars are significantly cooler than the non-magnetics. For all CV white dwarfs, magnetic and non-magnetic with Teff < 12,500K, 91% of the objects (10 out of 11) are magnetics in polars. This suggests that long term accretion heating and cooling of white dwarfs in polars differs from the effects of long term accretion in non-magnetic disk accretors.

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Subarsyah, Subarsyah, and Budi Nhirwana. "PENGGUNAAN METODE ANALISIS SINYAL DALAM INTERPRETASI DATA MAGNET DI PERAIRAN SELAT SUNDA UNTUK MENENTUKAN ARAH DAN POSISI PIPA BAWAH LAUT." JURNAL GEOLOGI KELAUTAN 9, no. 1 (February 16, 2016): 45. http://dx.doi.org/10.32693/jgk.9.1.2011.199.

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Penentuan arah dan posisi pipa bawah laut dengan menggunakan data magnetik seringkali mengalami kesulitan dikarenakan data yang didapat tidak selalu ideal seperti yang diharapkan. Oleh karenanya diperlukan metoda yang dapat memberikan informasi posisi dan arah pipa. Analisis sinyal merupakan metoda yang akan diterapkan untuk membantu penentuan posisi dan arah pipa bawah laut. Informasi yang digunakan dalam metoda ini adalah horizontal dan vertical derivative yang erat kaitannya dengan nilai gradien anomali magnetik, sehingga data yang memiliki nilai anomali magnetik akan terlihat lebih jelas dibandingkan dengan area sekitarnya. Kata kunci : analisis sinyal, derivative. Determination of direction and position of the underwater pipeline by using magnetic data often have difficulty because the data obtained are not always ideal as expected. Therefore it is needed a method that can provide the position and also direction of underwater pipeline. Signal analysis is the method to be applied to determine the position and direction of the underwater pipeline. Information used in this methods are horizontal and vertical derivatives that closely related to the gradient of the magnetic anomalies, so that the data has a value of magnetic anomalies will be seen more clearly expose than the surrounding area. Keywords : signal analysis, derivative.

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Zhang, Zeying, Zhi-Ming Yu, Gui-Bin Liu, and Yugui Yao. "MagneticTB: A package for tight-binding model of magnetic and non-magnetic materials." Computer Physics Communications 270 (January 2022): 108153. http://dx.doi.org/10.1016/j.cpc.2021.108153.

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MOTOZAWA, Masaaki, Kyohei KINO, Tatsuo SAWADA, Yasuo KAWAGUCHI, and Mitsuhiro FUKUTA. "Effect of Magnetic Field Direction on Forced Convective Heat Transfer of Magnetic Fluid." Journal of the Japan Society of Applied Electromagnetics and Mechanics 23, no. 3 (2015): 612–17. http://dx.doi.org/10.14243/jsaem.23.612.

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Alymov, M. I., I. M. Milyaev, V. S. Yusupov, and A. I. Milyaev. "Nanocrystalline Hard Magnetic Materials." Advanced Materials & Technologies, no. 2 (2017): 010–18. http://dx.doi.org/10.17277/amt.2017.02.pp.010-018.

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Gormakov, A. N., and I. T. Sakharova. "MATERIAL FOR MAGNETIC SCREENS." European Journal of Natural History, no. 3 2020 (2020): 55–59. http://dx.doi.org/10.17513/ejnh.34086.

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Li, Jinhua, Nicolas Menguy, Marie-Anne Arrio, Philippe Sainctavit, Amélie Juhin, Yinzhao Wang, Haitao Chen, et al. "Controlled cobalt doping in the spinel structure of magnetosome magnetite: new evidences from element- and site-specific X-ray magnetic circular dichroism analyses." Journal of The Royal Society Interface 13, no. 121 (August 2016): 20160355. http://dx.doi.org/10.1098/rsif.2016.0355.

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The biomineralization of magnetite nanocrystals (called magnetosomes) by magnetotactic bacteria (MTB) has attracted intense interest in biology, geology and materials science due to the precise morphology of the particles, the chain-like assembly and their unique magnetic properties. Great efforts have been recently made in producing transition metal-doped magnetosomes with modified magnetic properties for a range of applications. Despite some successful outcomes, the coordination chemistry and magnetism of such metal-doped magnetosomes still remain largely unknown. Here, we present new evidences from X-ray magnetic circular dichroism (XMCD) for element- and site-specific magnetic analyses that cobalt is incorporated in the spinel structure of the magnetosomes within Magnetospirillum magneticum AMB-1 through the replacement of Fe 2+ ions by Co 2+ ions in octahedral ( O h ) sites of magnetite. Both XMCD at Fe and Co L 2,3 edges, and energy-dispersive X-ray spectroscopy on transmission electron microscopy analyses reveal a heterogeneous distribution of cobalt occurring either in different particles or inside individual particles. Compared with non-doped one, cobalt-doped magnetosome sample has lower Verwey transition temperature and larger magnetic coercivity, related to the amount of doped cobalt. This study also demonstrates that the addition of trace cobalt in the growth medium can significantly improve both the cell growth and the magnetosome formation within M. magneticum AMB-1. Together with the cobalt occupancy within the spinel structure of magnetosomes, this study indicates that MTB may provide a promising biomimetic system for producing chains of metal-doped single-domain magnetite with an appropriate tuning of the magnetic properties for technological and biomedical applications.

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Ветошко, П. М., Ф. П. Ветошко, В. Г. Шавров, and В. И. Щеглов. "Магнитостатическая энергия доменных стенок в одноосных пленках конечных размеров." Физика твердого тела 61, no. 10 (2019): 1767. http://dx.doi.org/10.21883/ftt.2019.10.48247.278.

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AbstractThe solution to the problem of calculating the magnetostatic interaction energy of domain walls in uniaxial magnetics with a uniform magnetization distribution inside the domains is given. In carrying out the calculations, the principle of equivalent currents is used, assuming a uniform distribution of magnetization and its representation by equivalent currents flowing along the domain walls and along the surface. Analytical expressions for the mutual induction of two rectangular conductors with an arbitrary aspect ratio have been obtained. Results may be helpful in determining equilibrium configurations of domain structures in magnetic elements of spintronic devices, magnetic sensors and magnetic memory.

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Wang, Xiaoke, Likun Liang, Tao Song, and Longfei Wu. "Sinusoidal magnetic field stimulates magnetosome formation and affects mamA, mms13, mms6, and magA expression in Magnetospirillum magneticum AMB-1." Canadian Journal of Microbiology 54, no. 12 (December 2008): 1016–22. http://dx.doi.org/10.1139/w08-095.

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Magnetic particles are currently one of the most important materials in the industrial sector, where they have been widely used for biotechnological and biomedical applications. To investigate the effects of the imposed magnetic field on biomineralization in Magnetospirillum magneticum AMB-1 and to suggest a new approach that enhances formation of magnetosomes, cultures inoculated with either magnetic or nonmagnetic precultures were incubated under a sinusoidal magnetic field or geomagnetic field. The results showed that the sinusoidal magnetic field up-regulated mms6 expression in the cultures inoculated with magnetic cells, and magA, mms6, and mamA expression in the cultures inoculated with nonmagnetic cells. The applied sinusoidal magnetic field could block cell division, which could contribute to a decrease in the OD600 values and an increase in the coefficient of magnetism values of the cultures, which could mean that the percentage of mature magnetosome-containing bacteria was increased. The linearity of magnetosome chains was affected, but the number of magnetic particles in cells was increased when a sinusoidal magnetic field was applied to the cultures. The results imply that the variable intensity and orientation of the sinusoidal magnetic field resulted in magnetic pole conversion in the newly forming magnetic particles, which could affect the formation of magnetic crystals and the arrangement of the adjacent magnetosome.

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Nugraha, Yudhistira Adi, Puguh Hiskiawan, and Supriyadi Supriyadi. "Upward Continuation of Subsurface Anomalies Utilizing Magnetic Data in The Bedadung Watershed, Jember City." Jurnal ILMU DASAR 16, no. 2 (November 22, 2016): 69. http://dx.doi.org/10.19184/jid.v16i2.1516.

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Magnetic method is a geophysics method to determine the kind of subsurface material in certain depth by identifying the magnetic characteristics of rock based on the value of magnetic suspetibility. The data analysis described the subsurface anomaly using upward continuation filter. It separated local anomaly and regional anomaly by lifting research area in certain elevation. The raw data research was the total of magnetics data around Bedadung watershed, Jember. It was proceeded to obtaine magnetic anomaly curve on 5 line in contour map. It was digitalized and use as data input of magpick and upward continuation filter program. Upward continuation program was conducted using variation of area elevation in each track from 1 m up to 30 m. magnetic anomaly from this program is compared to magpick result showed that the magnetic anomaly curve on each line have good suitability with the accuracy 0,93%. Therefore, the continuation program become the alternative in magnetic data processing.

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37

Motozawa, Masaaki, Yuta Iizuka, and Tatsuo Sawada. "OS8-2-2 Ultrasonic analysis of clustering structures in magnetic fluid under magnetic field." Abstracts of ATEM : International Conference on Advanced Technology in Experimental Mechanics : Asian Conference on Experimental Mechanics 2007.6 (2007): _OS8–2–2–1—_OS8–2–2–5. http://dx.doi.org/10.1299/jsmeatem.2007.6._os8-2-2-1.

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Kudláčková, Šárka, and František Záťura. "MRI targeted biopsy of the prostate - 2nd part: fusion techniques." Urologie pro praxi 18, no. 5 (December 1, 2017): 206–8. http://dx.doi.org/10.36290/uro.2017.049.

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Basuki, Rajab, Nanang Dwi Ardi, and Mimin Iryanti. "Analisis Sebaran Mineral Logam Pada Sedimentasi Batuan Di Daerah Kertajadi, Cidaun, Kabupaten Cianjur, Jawa Barat Menggunakan Metoda Geomagnet." Wahana Fisika 2, no. 1 (June 20, 2017): 37. http://dx.doi.org/10.17509/wafi.v2i1.7019.

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Cidaun merupakan salah satu daerah pesisir pantai selatan yang terletak pada Kabupaten Cinajur Provinsi Jawa Barat. Salah satu kelebihan dari daerah pesisir pantai selatan Pulau Jawa adalah terdapat banyaknya mineral logam penghasil besi yang tersebar luas di sepanjang pesisir pantai. Oleh karena itu dilakukanlah eksplorasi untuk memetakan sebaran mineral logam yang ada di daerah Cidaun. Dalam melakukan eksplorasi mineral logam dibutuhkan suatu metode yang paling efektif yaitu eksplorasi geofisika dengan menggunakan metode geomagnet. Proses pengolahan data pada metode geomagnet dilakukan dengan menghitung nilai anomali magnetik dari medan magnetik total yang telah dilakukan koreksi terhadap koreksi harian dan koreksi IGRF. Kemudian dengan metode inversi data yang telah didapat dijadikan sebuah model. Selain itu dilakukan juga interpretasi kualitatif dan interpretasi kuantitatif. Interperetasi kualitatif dilakukan pada data yang telah dimodelkan menggunakan software surfer 11, apabila data tersebut terdapat anomali magnetik bernilai sangat tinggi yang berdekatan dengan nilai anomali magnetik bernilai rendah atau perubahan nilai anomali terjadi secara signifikan kemudian dilakukan proses interpretasi secara kuantitatif. Interpretasi kuantitatif pada penelitian ini dengan dilakukan deliniasi berupa proses sayatan pada perbedaan nilai anomali magnetik yang terjadi perubahan secara signifikan. Tahap selanjutnya data dari proses sayatan tersebut kemudian dilakukanlah pemodelan menggunakan software mag2dc untuk mengetahui sebaran mineral logam dapa daerah tersebut. Berdasarkan data yang telah diolah pada daerah Kertajadi, Cidaun, Kabupaten Cianjur, Jawa Barat dengan koordinat 698283 easting - 757162 easting dan 9180169 northing - 9171050 northing memiliki rentang nilai anomali magnetik -5 nT – 145 nT. Sedangkan nilai anomali magnetik pada daerah yang telah dilakukan proses sayatan memiliki rentang nilai 84.18 nT - 119.69 nT dengan nilai susptibilitas -0.041000 – 0.050001. Dari rentang nilai suseptibilitas tersebut diduga sebaran mineral yang yang memiliki nilai suseptibilitas positif merupakan bijih besi sedangkan yang bernilai negatif merupakan lempung dan endapan pasir. Dari hasil dari penelitian ini diharapkan data tersebut dapat dijadikan informasi dan referensi bagi masyarakat, peneliti lain dan pengusaha tambang dalam eksplorasi mineral logam.Cidaun is one of the coastal areas of the southern coast located in the district of West Java province Cinajur. One of the advantages of the southern coastal areas of Java is that there are many ferrous metal mineral producer widespread along the coast. Therefore, the exploration was undertaken to map the distribution of metallic minerals in the area Cidaun. In conducting metal mineral exploration required a most effective method is a geophysical exploration using geomagnetic methods. Data processing on geomagnetic method is done by calculating the value of the magnetic anomalies of the total magnetic field has a daily correction of correction and correction IGRF. Then, with the inversion method of data has been obtained serve as a model. The researcher also interpretation of qualitative and quantitative interpretation. Qualitative Interperetasi performed on the data that has been modeled using software surfer 11, when the inputs are very high-value magnetic anomalies adjacent to the value of the magnetic anomalies of low value or change in value of the anomaly occurred significantly later performed quantitative interpretation process. Quantitative interpretation in this study conducted a process of delineation of the incision on the difference in magnetic anomaly change significantly. The next stage of the data are then perform the incision process modeling using software mag2dc to determine the distribution of metallic minerals onshore areas. Based on the data that has been processed in the region Kertajadi, Cidaun, Cianjur, West Java coordinate 698283 easting - 757162 easting and 9180169 northing - 917105 northing and has a value range of magnetic anomaly -5 nT - 145 nT. While the value of magnetic anomalies in the area that has been carried out the process of incisions have a range of values 84.18 nT - 119.69 nT with susptibilitas value -0.041000 - 0.050001. Of the value range susceptibility is suspected distribution of minerals that have a positive susceptibility value is the iron ore which is negative while the clay and sand deposits. From the results of this study are expected data can be made of information and reference for the community, other researchers and mining company in mineral exploration.

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Ding, Chao, Yunhui Mei, Khai D. T. Ngo, and Guoquan Lu. "A (Permalloy + NiZn Ferrite) Moldable Magnetic Composite for Heterogeneous Integration of Power Electronics." Materials 12, no. 12 (June 22, 2019): 1999. http://dx.doi.org/10.3390/ma12121999.

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Soft magnetic moldable composites (SM2Cs) would be ideally suited for the integration of magnetic components in power electronic converters because they can be formed into magnetic cores by low-temperature and pressure-less processing. However, most SM2Cs have low relative magnetic permeability, typically less than 30, and high core-loss densities at switching frequencies over 1 MHz. To improve their magnetic properties, we combine powders of Permalloy and a NiZn ferrite with an acrylic polymer to formulate a paste of SM2C. The paste can be molded and then cured below 200 °C without pressure to form cores with a relative permeability over 35 and a core-loss density at 1 MHz, 30% lower than those of commercial cores. The ease of its processing and high-performance properties makes the SM2C a good candidate material for the integration of power magnetics.

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41

Ismail, Izwan, Saiful Amri Mazlan, and Abdul Ghani Olabi. "Magnetic Circuit Simulation for Magnetorheological (MR) Fluids Testing Rig in Squeeze Mode." Advanced Materials Research 123-125 (August 2010): 991–94. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.991.

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In this study, a testing rig in squeeze was designed and developed with the ability to conduct various tests especially for quasi-static squeezing at different values of magnetic field strength. Finite Element Method Magnetics (FEMM) was utilized to simulate the magnetic field distribution and magnetic flux lines generation from electromagnetic coil to the testing rig. Tests were conducted with two types of MR fluid. MRF-132DG was used to obtain the behaviour of MR fluid, while synthesized epoxy-based MR fluid was used for investigating the magnetic field distribution with regards to particle chains arrangement. Simulation results of the rig design showed that the magnetic flux density was well distributed across the tested materials. Magnetic flux lines were aligned with force direction to perform squeeze tests. Preliminary experimental results showed that stress-strain pattern of MR fluids were in agreement with previous results. The epoxy-based MR samples produced excellent metallographic samples for carbonyl iron particles distributions and particle chain structures investigation.

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Scholten, P. C., and J. A. P. Felius. "The magnetical and rheological behavior of aggregating magnetic suspensions." Journal of Magnetism and Magnetic Materials 85, no. 1-3 (April 1990): 107–13. http://dx.doi.org/10.1016/0304-8853(90)90031-k.

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Ta'uno, Jein Sintia Dewi, Gerald H. Tamuntuan, and Seni H. J. Tongkukut. "Analisis Medan Magnet Bumi Sebelum dan Sesudah Kejadian Gempa (Studi Kasus: Gempa 18 November 2014 di Sabang)." Jurnal MIPA 5, no. 2 (August 2, 2016): 65. http://dx.doi.org/10.35799/jm.5.2.2016.12962.

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Telah dilakukan penelitian untuk mengidentifikasi dan menganalisis perubahan medan magnet bumi sebelum dan sesudah kejadian gempa 18 November 2014 di Sabang yang dapat dikenali sebagai prekursor gempa bumi. Metode yang digunakan adalah perbandingan residu medan magnet komponen Z dan H. Untuk memastikan anomali yang diperoleh bukan berasal dari gangguan eksternal, data diverifikasi dengan Indeks Dst. Hasil yang diperoleh menunjukkan bahwa anomali medan magnet terjadi pada 2 dan 8 hari sebelum gempa. Anomali diduga kuat berasal dari aktivitas litosfer yang berkaitan dengan retakan yang terjadi pada batuan yang dialiri cairan yang mengandung material bersifat magnet yang menyebabkan kenaikan nilai rasio medan magnet Z/H.A research has been done to identify and analyze earth’s magnetic field change before and after November 18th, 2014 earthquake in Sabang that can be recognize as an earthquake precursor. Method that used ini this research was comparison of Z and H residu of magnetic’s field. To ensure that anomaly identified were not of due to external disturbances that records, data were examined by Dst Index. The result of this research showed that magnetic’s field anomaly were identified in 2 and 8 days before earthquake event. This anomaly was predicted from lithosphere that associated with rock’s crack that flow by liquid that contains magnetic material cause increased of magnetic’s field Z/H rasio.

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Rangkuti, Muhammad Zul Ilmi, Salomo Salomo, and Usman Malik. "PERBANDINGAN NILAI SUSEPTIBILITAS MAGNETIK AIR LAUT MENGGUNAKAN METODE QUINCKE DI PANTAI SUMATERA BAGIAN TENGAH." Komunikasi Fisika Indonesia 17, no. 1 (March 26, 2020): 41. http://dx.doi.org/10.31258/jkfi.17.1.41-45.

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Telah dilakukan penelitian perbandingan nilai suseptibilitas magnetik air laut di pantai barat dan timur sumatera bagian tengah menggunakan metode Quincke. Jumlah sampel yang diambil dari penelitian ini sebanyak 500 ml tiap-tiap lokasi. Jumlah titik lokasi sampel adalah 24 didapatkan dari tiga pantai barat sumatera bagian tengah dan satu pantai timur. Metode yang digunakan untuk pengambilan sampel adalah fungsi jarak dengan rentang 300 m dari tepi pantai. Induksi magnetik solenoida diukur menggunakan Probe Magnetic Pasco Ps-2162 dengan dua buah solenoid 3000 lilitan. Ketika arus dinaikkan induksi magnetik semakin besar. Nilai suseptibilitas magnetik ( χ ) air laut pantai barat menunjukkan rentang -1,04 x 10-5 sampai -4,53(x 10-5). Sampel merupakan bahan diamagnetik. Nilai suseptibilitas magnetik ( χ ) air laut pantai timur menunjukkan rentang -0,5 x 10-5 sampai -1,46(x 10-5).sampel merupakan bahan diamagnetik. Salinitas dan pH menyebabkan perbedaan nilai suseptibilitas magnetik air laut.

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Wu, Wenbo, Runli Tang, Qianqian Li, and Zhen Li. "Functional hyperbranched polymers with advanced optical, electrical and magnetic properties." Chemical Society Reviews 44, no. 12 (2015): 3997–4022. http://dx.doi.org/10.1039/c4cs00224e.

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This review summarizes the recent progress in functional HBPs and their application in optics, electronics and magnetics, including light-emitting devices, aggregation-induced emission materials, nonlinear optical materials, chemosensors, solar cells, magnetic materials, etc., and provides outlooks for further exploration in the field.

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Volkov, O. M., and V. P. Kravchuk. "Saturation of Magnetic Films with Spin-Polarized Current in the Presence of a Magnetic Field." Ukrainian Journal of Physics 58, no. 7 (July 2013): 666–72. http://dx.doi.org/10.15407/ujpe58.07.0666.

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Wang, Yonliang, Yongbo Wu, and Mitsuyoshi Nomura. "2206 Magnetic field-assisted polishing of miniature V-grooves using MCF(Magnetic Compound Fluid) slurry." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2015.8 (2015): _2206–1_—_2206–5_. http://dx.doi.org/10.1299/jsmelem.2015.8._2206-1_.

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Subarsyah, Subarsyah, Lukman Arifin, and Dida Kusnida. "INTERPRETASI STRUKTUR BAWAH PERMUKAAN BERDASARKAN ATRIBUT ANOMALI MAGNETIK PERAIRAN WETAR, NUSA TENGGARA TIMUR." JURNAL GEOLOGI KELAUTAN 12, no. 1 (February 16, 2016): 15. http://dx.doi.org/10.32693/jgk.12.1.2014.242.

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Abstract:

Struktur geologi yang berkembang di Perairan Wetar berupa Proto-Thrust-Zone, Frontal-Thrust dan Sesar Mendatar. Kelurusan anomali magnetik dikontrol oleh kontras suseptibilitas magnetik dari fenomena geologi. Interpretasi fenomena geologi berdasarkan anomali magnetik memperlihatkan Sesar Naik Wetar yang cukup jelas di bagian selatan, dan berpindah tidak menerus ke bagian timur daerah penelitian akibat Sesar Mendatar. Fenomena geologi lainnya berdasarkan metode horisontal derivatif orde 1 dan analisis sinyal terlihat jelas batas keberadaan tubuh batuan vulkanik. yang teridentifikasi dalam penampang seismik lintasan 5 dan 9. Metode ini cukup baik dalam memetakan struktur bawah permukaan. Di perairan Wetar sebagian anomali magnet tidak bisa diinterpretasikan jika dikorelasikan dengan penampang seismik. Hal ini terkait dengan hipotesis keberadaan paleomagnetik dan kerak Banda bagian selatan yang merupakan lempeng samudera yang terperangkap. Kata Kunci : magnet, horisontal derivatif, anomali, perairan Wetar Geological structures that develop in the Wetar waters are Proto Thrus Zone, Frontal Thrust Zone and Strike Slip Fault. Magnetic lineament controlled by sussceptibility contrast of geological phenomena. Interpretation of geological phenomena based on magnetic anomaly clearly show the strike-slip fault trending in the south, and move discontinuously eastward of the study area due to Strike-Slip Fault. Other geological phenomena clearly identified by horizontal derivative and signal analysis method such as the boundary of volcanic body as seen on seismic section line 5 and 9. These method quite usefull to map subsurface structure. Some part of the magnetic anomaly in the Wetar Waters cannot be interpreted since they are correlated with seismic section. It may be due to the hypothesis of the present of paleomagnetic southern Banda basin assumed as the trapped oceanic crust. Keywords: magnetic, derivative horizontal, anomaly, Wetar waters

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Antonov, Lev I. "Macroscopic representation of the magnetization vector field in a magnetic substance." Uspekhi Fizicheskih Nauk 173, no. 11 (2003): 1241. http://dx.doi.org/10.3367/ufnr.0173.200311f.1241.

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Zhukov, Arcady, Paula Corte-León, Lorena González-Legarreta, Mihail Ipatov, Ahmed Talaat, Juan M. Blanco, Julian Gonzalez, and Valentina Zhukova. "Magnetic Microwires For Sensor Applications." Advanced Materials Letters 10, no. 5 (February 1, 2019): 305–11. http://dx.doi.org/10.5185/amlett.2019.2202.

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