Field strength

In this work, we proposed a simple model for control of subluminal and superluminal light propagation via an external magnetic field in a lambda configuration degenerate two-level atomic medium. We show that the absorption-dispersion properties and group index under the influence of the strength of coupling laser and external magnetic fields are controlled.

8p viambani 18-06-2024 3 1   Download

Part 2 of ebook "Critical state soil mechanics" provides readers with contents including: Chapter 6 - Cam-clay and the critical state concept; Chapter 7 - Interpretation of data from axial tests on saturated clays; Chapter 8 - Coulomb’s failure equation and the choice of strength parameters; Chapter 9 - Two-dimensional fields of limiting stress; Chapter 10 - Conclusion;...

126p giangdongdinh 28-05-2024 3 2   Download

Part 1 book "Fundamental electrical and electronic principles" includes content: Fundamentals, D.C. circuits, electric fields and capacitors, magnetic fields and circuits.

153p dianmotminh01 14-05-2024 4 2   Download

Due to typical topographical-geological conditions for the coastal plain, this study area has a wide plain with many sandy areas and sand fields, which come from marine origin, with a large total amount. This paper showed conduct investigate the influence of fineness and salinity of marine sand to CCS made from marine sand as fine aggregate.

9p viellison 06-05-2024 3 1   Download

Disagreements over genetic signatures associated with disease have been particularly prominent in the field of psychiatric genetics, creating a sharp divide between disease burdens attributed to common and rare variation, with study designs independently targeting each.

14p vioraclene 31-03-2024 2 2   Download

The study introduced the concept of countries' digital development in the field of supply chain management (SCM) from the perspective of participation in global supply chains (GSC). A SWOT analysis of the proposed concept was performed, according to which, strengths, weaknesses, opportunities, and threats of the nation's involvement in GSCs were denoted. This research outlined the necessity for creating approaches and programs to ensure the logistics sector's digital growth for developed and developing nations and reduce modern unlevelled threats.

7p longtimenosee06 27-03-2024 5 1   Download

The inverted pendulum on a cart is a challenging and widely studied control problem in the fields of control systems and robotics. To address the need for more effective control strategies, this article presents a novel approach that combines the strengths of two powerful control techniques: Linear-Quadratic Regulator (LQR) and Takagi-Sugeno (T-S) fuzzy control.

15p vibego 02-02-2024 3 1   Download

Ebook "Molecular identification, systematics, and population strudure of prokaryotes" summarizes recent developments in the molecular characterization of cultured and as-yet uncultured prokaryotes, emphasizing the strengths and weaknesses of individual approaches. The chapters of the book are compiled to stimulate students to enter the field of bacterial diversity, presenting a broad spectrum of fascinating multifaceted disciplines that illuminate the paths to ecosystem functioning, communication within communities, symbiosis, life in extreme environments, astrobiology, and more.

328p tachieuhoa 28-01-2024 3 2   Download

This study presents an innovative method for the selection and design of magnetic cores for DC-DC converters. In contrast to conventional approaches that rely on the Area Product (U`) and involve extensive trial and error, our proposed methodology employs two main key parameters: the Core to Copper Loss Ratio (γ) and the Window Utilization Factor (rd) during the inductor design process.

7p vimichaelfaraday 28-12-2023 7 6   Download

Ebook "The biology of the first 1,000 days" addresses this crucial interval of early life across biological disciplines, linking concepts related to all biological fields to outcomes during the first 1,000 days (e.g. fetal growth and pregnancy outcomes) and beyond (e.g. gut microbiome and cardiovascular disease later in life). The strength of this book lies in its cross-disciplinary nature.

519p lucchinguyen 28-12-2023 7 2   Download

"Standard Test Method for Direct Current Magnetic Properties of Soft Magnetic Materials Using D-C Permeameters and the Point by Point (Ballistic) Test Methods" provides dc permeameter tests for the basic magnetic properties of soft magnetic materials in the form of bars, rods, wire, or strip specimens which may be cut, machined, or ground from cast, compacted, sintered, forged, extruded, rolled, or other fabricated materials.

11p hth_hn_vn 10-12-2023 9 4   Download

"Standard Test Methods for Permeability of Weakly Magnetic Materials" cover four procedures for determination of the permeability [relative permeability]2 of materials having a permeability not exceeding 6.0. Materials typically tested by these methods such as austenitic stainless steels may be weakly ferromagnetic. That is, the magnetic permeability is dependent on the magnetic field strength.

8p hth_hn_vn 10-12-2023 6 4   Download

"Standard Test Method for Alternating Current Magnetic Properties of Materials Using the Wattmeter-Ammeter-Voltmeter Method, 100 to 10 000 Hz and 25-cm Epstein Frame" covers the determination of the magnetic properties of flat-rolled magnetic materials using Epstein test specimens with double-lap joints in the 25-cm Epstein frame. It covers determination of core loss, rms and peak exciting current, exciting power, magnetic field strength, and permeability.

11p hth_hn_vn 10-12-2023 6 4   Download

This test method covers dc ballistic testing for the determination of basic magnetic properties of materials in the form of ring, toroidal, link, double-lapped Epstein cores, or other standard shapes which may be cut, stamped, machined, or ground from cast, compacted, sintered, forged, or rolled materials. It includes tests for normal induction and hysteresis taken under conditions of steep wavefront reversals of the direct-current magnetic field strength.

8p hth_hn_vn 10-12-2023 10 4   Download

This test method covers the determination of the magnetic performance of fully processed cores for magnetic amplifier-type applications. Tests may be conducted at excitation frequencies of 60, 400, 1600 Hz, or higher frequencies.

17p hth_hn_vn 10-12-2023 9 4   Download

This specification covers commonly used wrought nickel-iron soft magnetic alloys produced or supplied expressly for use in magnetic cores and other parts requiring high magnetic permeability, high electrical resistivity, low coercive field strength, and low core loss.

6p hth_hn_vn 10-12-2023 7 5   Download

This test method provides a means for determination of the impedance permeability of ferromagnetic materials under the condition of sinusoidal current (sinusoidal H) excitation. Test specimens in the form of laminated toroidal cores, tape-wound toroidal cores, and link-type laminated cores having uniform cross sections and closed flux paths (no air gaps) are used. The method is intended as a means for determining the magnetic performance of ferromagnetic strip having a thickness less than or equal to 0.025 in. [0.635 mm].

4p hth_hn_vn 10-12-2023 13 4   Download

This specification covers parts produced from iron powder metallurgy materials. This specification deals with powder metallurgy parts in the sintered or annealed condition. Should the sintered parts be subjected to any secondary operation that causes mechanical strain, such as machining or sizing, they should be resintered or annealed.

4p hth_hn_vn 10-12-2023 6 4   Download

Part 1 of ebook "Electrical circuit theory and technology" provides readers with contents including: basic electrical engineering principles; units associated with basic electrical quantities; an introduction to electric circuits; series and parallel networks; capacitors and capacitance; magnetic circuits; electromagnetic induction; electrical principles and technology; alternating voltages and currents; three-phase systems;...

309p dangsovu 20-10-2023 9 7   Download

In this work, we carried out survey on magnetic field strength and gradient in space around arrays of micro-sized parallelepipedic magnets by simulation and calculation. Magnetic field distributions are a function of magnet’s size and position with respect to magnet’s surface.

9p viberkshire 09-08-2023 7 4   Download