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Ditemukan 134 dokumen yang sesuai dengan query
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Fontana, Peter A.
New York: Academic Press, 1982
530.141 FON a
Buku Teks SO  Universitas Indonesia Library
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"We use an electromagnetic plating system based on the electric and magnetic field to reduce the Fe and Mn concentrations on deep well water. The parameters in this research are solenoide current and voltage difference between electrodes. The results shows that for uncovered electrodes, optimal condition is reached at solenoide when current is 4 ampere. Meanwhile, the voltage optimal condition is reached when voltage is 4 volt. For coated electrodes (flexi glass) the optimal concentration of Fe is reached at solenoide when current is 4 ampere. While for variation of voltage the optimal concentration Fe is reached when voltage is 4 volt."
Artikel Jurnal  Universitas Indonesia Library
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Konopinski, Emil J.
New York: McGraw-Hill, 1981
530.141 KON e
Buku Teks SO  Universitas Indonesia Library
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Monika Besti Yolanda
"Penggunaan alat-alat listrik saat ini tidak bisa dihindari, sehingga manusia terpajan dengan Extremely Low Frequency ? Electromagnetic Field (ELF-EMF). Pemajanan ini dapat menyebabkan gangguan perkembangan folikel ovarium. Penelitian ini bertujuan untuk mengetahui pengaruh pemajanan ELF-EMF terhadap jumlah dan morfologi folikel sekunder serta untuk melihat efek kumulatif pemajanan tiap generasi. Metode penelitian yaitu eksperimental terhadap mencit betina strain Swiss Webster. Digunakan 12 pasang mencit parental yang mendapatkan empat perlakuan pemajanan. Beberapa mencit dari tiap perlakuan akan dikawinkan untuk mendapatkan mencit generasi pertama, kedua dan ketiga. Mencit lainnya akan dietanasi untuk diambil ovariumnya dan dijadikan preparat. Jumlah preparat yang digunakan yang dianalisis adalah 60 sampel. Setiap sampel diamati untuk mendapatkan jumlah folikel sekunder normal dan folikel sekunder atresia. Uji hipotesis dilakukan uji One-Way ANOVA dan Kruskal-Wallis. Pada analisis data didapatkan perbedaan yang bermakna pada folikel atresia sekunder berbagai tegangan di generasi F2 (p=0,002) dan F3 (p=0,027), dan dilanjutkan ke analisis Post Hoc. Didapatkan perbedaan yang bermakna antar tegangan di generasi F2 dan F3. Sementara pada analisis data folikel sekunder dan folikel atresia sekunder antar generasi tidak terdapat perbedaan bermakna. Dapat disimpulkan bahwa terdapat pengaruh pemajanan ELF-EMF berbagai tegangan terhadap morfologi folikel sekunder ovarium. Namun, tidak didapatkan efek kumulatif tiap generasi.

We can hardly avoid the use of electricity tools, so human are exposed to Extremely Low Frequency ? Electromagnetic Field (ELF-EMF). This exposure can affect development of ovarian follicles. Aim of this study is to determine the effects of ELF-EMF exposure on number and morphology of secondary follicles, also to see the inter-generational cumulative effects. This study use experimental design and strain Swiss Webster female mice as the subject. There are 12 pairs of parental mice who received four treatments. Some mice from each treatment will be mated to obtain the first, second and third generation of mice. Other mice's ovaries will be taken. There are 60 samples of ovaries preparation to be observed under microscope. Hypothesis testing is done by One-Way ANOVA test and Kruskal-Wallis. There is significant differences in the secondary atresia follicles at the various voltages in the F2 (p = 0,002) and F3 (p = 0,027). The analysis than continue to Post-Hoc analysis. There are significant differences in voltage between F2 and F3 generations, while there are no significant differences in data analysis of secondary follicles and secondary atresia follicles between generations. The conclution is there are significant effects of ELF-EMF exposure to various voltages on secondary ovarian follicles morphology. However, there are no cumulative effects in each generation."
Depok: Universitas Indonesia, 2013
S-Pdf
UI - Skripsi Membership  Universitas Indonesia Library
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Violette, J.L. Norman
"Buku yang berjudul "Electromagnetic compatibility handbook" ini ditulis oleh J. L. Norman Violette, Donald R. J. White, dan Michael F. Violette. Buku ini merupakan sebuah buku panduan mengenai elektromagnetik."
New York: Van Nostrand Reinhold, 1985
R 621.380436 VIO e
Buku Referensi  Universitas Indonesia Library
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Gregson, Stuart Fraser
"This single volume provides a comprehensive introduction and explanation of both the theory and practice of 'Planar Near-Field Antenna Measurements', from its basic postulates and assumptions, to the intricacies of its deployment in complex and demanding measurement scenarios. To do this the book initially examines the properties of antennas that allow them to enhance the free space interaction of electronic systems and this leads into a full description of the theory of 'Planar Near-Field Scanning'."
London: Institution of Engineering and Technology, 2007
e20451650
eBooks  Universitas Indonesia Library
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Morgan, David
"This major reference book is aimed at engineers and technical managers concerned with EMC (electromagnetic compatibility). It explains why EMC testing is necessary, what standards must be met, how such testing is carried out (and therefore how to prepare for it), what accuracy and repeatability can be expected, and when to test. For less than the cost of half a day's testing in a laboratory, with this book manufacturers of equipment can prepare for and interact with test houses on the basis of sound knowledge; thereby reducing the time and expense incurred prior to EMC approval."
London: International Engineering Consortium, 2007
e20452027
eBooks  Universitas Indonesia Library
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Danos, Michael
Amsterdam: North-Holland, 1984
530.143 DAN m
Buku Teks SO  Universitas Indonesia Library
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Spreemann, Dirk
"Electromagnetic vibration energy harvesting devices introduces an optimization approach which is applied to determine optimal dimensions of the components (magnet, coil and back iron). Eight different commonly applied coupling architectures are investigated. The results show that correct dimensions are of great significance for maximizing the efficiency of the energy conversion. A comparison yields the architectures with the best output performance capability which should be preferably employed in applications. A prototype development is used to demonstrate how the optimization calculations can be integrated into the design?flow. Electromagnetic vibration energy harvesting devices targets the designer of electromagnetic vibration transducers who wishes to have a greater in-depth understanding for maximizing the output performance."
Dordrecht, Netherlands: [Springer, ], 2012
e20398222
eBooks  Universitas Indonesia Library
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Bloom, Frederick
"Examines ill-posed, initial-history boundary-value problems associated with systems of partial-integrodifferential equations arising in linear and nonlinear theories of mechanical viscoelasticity, rigid nonconducting material dielectrics, and heat conductors with memory.
Variants of two differential inequalities, logarithmic convexity, and concavity are employed. Ideas based on energy arguments, Riemann invariants, and topological dynamics applied to evolution equations are also introduced.
These concepts are discussed in an introductory chapter and applied there to initial boundary value problems of linear and nonlinear diffusion and elastodynamics. Subsequent chapters begin with an explanation of the underlying physical theories."
Philadelphia: Society for Industrial and Applied Mathematics, 1981
e20449457
eBooks  Universitas Indonesia Library
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