Micro-optical coherence tomography (μOCT) is an advanced imaging technique that acquires a three-dimensional microstructure of biological samples with high spatial resolution, up to 1 μm, by using broadband light source and numerical aperture (NA) lens. As NA produces short depth focus (DOF), extending the DOF necessary obtain reasonable depth. However, due complexity optics limited space, it has been challenging fabricate endoscopic μOCT, which essential for clinical translation. Here, we...

The trade-off between spot size and depth of focus (DOF) often limits the performance optical systems, such as coherence tomography tweezers. Although researchers have proposed various methods to extend DOF in free-space optics, many are difficult implement miniaturized probes due space limitations. In this study, we present an probe with extended using a binary phase spatial filter (BPSF). BPSF pattern was fabricated on distal tip diameter 1 mm by replica molding soft lithography, which can...

This paper presents the design of an ultrahigh speed permanent magnet (PM) motor/generator driven at a rated output and 10 kW 70 000 r/min, respectively, for use in electric-turbo compounding system. When designing very-high motor/generator, mechanical structural safety rotor losses that occur when motor operates high should be considered safe operation. In this paper, optimal PM is performed with finite element analysis analysis. Especially, electromagnetic characteristics based on sleeve...

Regenerative semi-active suspensions can capture the previously dissipated vibration energy and convert it to usable electrical for powering on-board electronic devices, while achieve both better ride comfort improved road handling performance at same time when certain control is applied. To this objective, power electronics interface circuit connecting harvester loads, which perform simultaneous harvesting function in need. This paper utilized a buck-boost converter with electromagnetic...

We studied the active layer thickness dependence of device performance bulk heterojunction solar cells. The polymer cells comprising RR-P3HT:PCBM (1:0.8 (wt %:wt%)) blend films with different (from 80 nm to 340 nm) were characterized. dissociation efficiency photo generated e-h pairs determined from current-effective voltage characteristics. is strongly involved fill factor and short circuit current maximum was increased shows decreasing tendency as increasing layer. Therefore, density...

A method is presented to determine the detailed design of a 150 kW-class interior permanent-magnet synchronous motor. The basic designs stator and rotor were determined, after dividing designed models into best worst cases on basis rotor-shaped parameters. First, three-bridge model satisfying structural (mechanical) safety factor proposed. does not meet required torque at rated maximum speed compared no-bridge model. Therefore, it necessary perform analysis through selection various However,...

The causes of faults induction motors are largely categorized into bearing fault, which a mechanical and stator fault rotor cause an electrical fault. A among these faults, occurs due to the breakdown insulation, meaning is directly connected with power supply, direct connection major accident. For this reason, many studies being performed detect faults. This paper explained effects negative sequence on phase angle change by analyzing existing d-q transform Park’s vector approach. suggested...

Abstract Principal component analysis (PCA) has been a widely used technique for dimension reduction while retaining essential information. However, the ordinary PCA lacks interpretability, especially when dealing with large scale data. To address this limitation, sparse (SPCA) emerged as an interpretable variant of PCA. SPCA relies on solving challenging non-convex discrete optimization problem, which maximizes explained variance constraining number non-zero elements in each principal...

In this study, the degradation of pharmaceuticals and personal care product (PPCP) compounds, including caffeine (CAF), atenolol (ATL), carbamazepine (CBZ), sulfamethoxazole (SMX), trimethoprim (TMP), acetaminophen (ACT) was evaluated under exposure to 1.0 1.5 mg/L ozone (O3), both with without ultraviolet (UV) irradiation. Using liquid chromatography tandem mass spectrometry, we determined that removal efficiency for targeted contaminants exceeded 95% within just 20 minutes O3. However,...

In this study, the effect of material characteristics electrical steel sheet on permanent magnet direct current (PMDC) motors is investigated using finite-element analysis. The motor design and test results are examined verified through fabrication. characterizations brushless (BLDC) according to materials used in their cores have been actively studied. On other hand, a PMDC consisting brushes commutators has not studied as much. case motors, sheets infrequently because relatively smaller...

In article number 2004099, Sihyuk Choi, Guntae Kim, and co-workers employe the isotope exchange diffusion profile (IEDP) method via time-of-flight secondary ion mass spectrometry (ToF-SIMS) to directly trace proton kinetics on layered perovskite-type triple conducting oxides (TCOs). This work offers an innovative way quantify kinetic properties (D*H k*H) of TCOs being a crucial indicator for characterizing electrochemical behaviour proton.

In the semiconductor chip mounting process, size of chips is decreasing, while number per time are increasing, and this trend being accelerated. The research activities to develop mounters, which able mount rapidly accurately, have been needed in industry. With background, linear motor mounters has an important part. electro-magnetic type many advantages such as direct reciprocating motion compared with rotary ball screw motor. However, thermal problems. These problems affect life...

In this paper, the characteristics of electromagnetic field using FEM are analyzed for PMSG basic model, and optimized design is performed to improve performance generator. case SPM type 5 kW generator used in torque ripple level was be relatively high compared with load generated during operation. Therefore, shape reduce it, permanent magnet selected as variables. Particularly, attached rotor surface by segment tapering were compared. As a result, reduction cogging confirmed through magnet....