PubMed Journals Articles About "Guardian Optical Technologies" RSS

20:06 EDT 18th March 2019 | BioPortfolio

Guardian Optical Technologies PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Guardian Optical Technologies articles that have been published worldwide.

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Showing "Guardian Optical Technologies" PubMed Articles 1–25 of 4,600+

Recent Advances in Optical Imaging Technologies for the Detection of Bladder Cancer.

White-light cystoscopy (WLC) is the diagnostic standard for the detection of bladder cancer (BC). However, the detection of small papillary and subtle flat carcinoma in situ lesions is not always possible with WLC. Several adjunctive optical imaging technologies have been developed to improve BC detection and resection. Photodynamic diagnosis, which requires the administering of a photoactive substance, has a higher detection rate than WLC for the detection of BC. Narrow-band imaging provides better visuali...

Application of optical and spectroscopic technologies for the characterization of carious lesions in vitro.

An All-Optical Excitonic Switch Operated in the Liquid and Solid Phases.

The excitonic circuitry found in photosynthetic organisms suggests an alternative to electronic circuits, but the assembly of optically active molecules to fabricate even simple excitonic devices has been hampered by the limited availability of suitable molecular scale assembly technologies. Here we have designed and operated a hybrid all-optical excitonic switch comprised of donor/acceptor chromophores and photochromic nucleotide modulators assembled with nanometer scale precision using DNA nanotechnology....

Guardian of mitochondrial function: an expanded role of Parkin in skeletal muscle.

The diagnostic screening of acute leukemia using new technologies of automated blood analysis.

The leukemia is a neoplastic clonal disease of hematopoietic system with primary affection of bone marrow. The modern technologies of automated blood analysis permit to implement a quick primary screening of pathological samples of blood suspicious for presence of blast cells. The application of various analysis techniques (optical, cytochemical, immune phenotypical) with the purpose of detecting blast cells demonstrates their different distribution at the graphics.

Development of Functional Requirements for Ex Vivo Pathology Applications of In Vivo Microscopy System: A Proposal From the In Vivo Microscopy Committee of the College of American Pathologists.

In vivo microscopy (IVM) allows direct, real-time visualization of tissue histology in living patients, without the need for tissue removal, processing, or staining. The IVM technologies in clinical use include confocal microscopy and optical coherence tomography. These technologies also show promise for use with pathology specimens (ex vivo microscopy [EVM]). However, few systems designed for EVM are commercially available, at least in part because of the lack of defined minimal functional requirements (FR...

Penetration and scattering-Two optical phenomena to consider when applying proximal remote sensing technologies to object classifications.

Proximal remote sensing is being used across a very wide range of research fields and by scientists, who are often without deep theoretical knowledge optical physics; the author of this article falls squarely in that category! This article highlights two optical phenomena, which may greatly influence the quality and robustness of proximal remote sensing: penetration and scattering. Penetration implies that acquired reflectance signals are associated with both physical and chemical properties of target objec...

Real-time 20.37 Gb/s optical OFDM receiver for PON IM/DD systems.

This paper presents the hardware architecture of an OFDM receiver suitable for optical communications. The receiver has been implemented in an FPGA device and used to demonstrate experimentally an optical OFDM transmission in a passive optical link with a directly modulated DFB laser and DAC/ADC at 5 GS/s. A bit rate of 20.37 Gb/s is achieved using an OFDM signal with subcarrier modulation format up to 512-QAM, it has been successfully transmitted over 10 km SSMF with a spectral efficiency of 8.38 bit/s/Hz.

Adoption of Stroke Rehabilitation Technologies by the User Community: Qualitative Study.

Using technology in stroke rehabilitation is attractive. Devices such as robots or smartphones can help deliver evidence-based levels of practice intensity and automated feedback without additional labor costs. Currently, however, few technologies have been adopted into everyday rehabilitation.

Fidelity test for through-focus or volumetric type of optical imaging methods.

Rapid increase in interest and applications of through-focus (TF) or volumetric type of optical imaging in biology and other areas has resulted in the development of several TF image collection methods. Achieving quantitative results from images requires standardization and optimization of image acquisition protocols. Several standardization protocols are available for conventional optical microscopy where a best-focus image is used, but to date, rigorous testing protocols do not exist for TF optical imagin...

Measuring the Single-Photon Temporal-Spectral Wave Function.

Temporal-spectral modes of light provide a fundamental window into the nature of quantum systems and offer a robust means for information encoding. Methods to precisely characterize the temporal-spectral state of light at the single-photon level thus play a central role in understanding single-photon sources and their applications in emerging optical quantum technologies. Here we demonstrate an optical reference-free method, which melds techniques from ultrafast metrology and single-photon spectral detectio...

Application of Digital Technologies in Maxillofacial Prosthetics Literature: A 10-Year Observation of Five Selected Prosthodontics Journals.

To identify trends in the application of various types of digital technologies in maxillofacial prosthetics by identifying these digital technologies and their characteristics and reviewing the prevalence of applied digital technologies and their recent trends in the maxillofacial prosthetics literature.

Magneto-optical effects in hyperbolic metamaterials.

Highly anisotropic metal-dielectric structures reveal unique dispersion properties providing new optical effects. Here we study experimentally linear optical and magneto-optical response of arrays of plasmonic gold nanorods and similar structures complemented by a thin nickel film. We show that both types of structures reveal distinct optical features expected for hyperbolic media and associated with the epsilon-near-zero (ENZ) and epsilon-near-pole (ENP) points. In the case of Ni-containing nanocomposites,...

Aligning Optical Maps to De Bruijn Graphs.

Optical maps are high resolution restriction maps that give a unique numeric representation to a genome. Used in concert with sequence reads, they provide a useful tool for genome assembly and for discovering structural variations and rearrangements. Although they have been a regular feature of modern genome assembly projects, optical maps have been mainly used in post processing step and not in the genome assembly process itself. Several methods have been proposed for pairwise alignment of single molecule ...

In-Vivo Ratiometric Optical Mapping Enables High-Resolution Cardiac Electrophysiology in Pig Models.

Cardiac optical mapping is the gold standard for measuring complex electrophysiology in ex-vivo heart preparations. However, new methods for optical mapping in-vivo have been elusive. We aimed at developing and validating an experimental method for performing in-vivo cardiac optical mapping in pig models.

Effect of far ultraviolet light emitted from an optical diffuser on methicillin-resistant Staphylococcus aureus in vitro.

Drug-resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA) are a target for new antimicrobial technologies. Far-UVC technology is an emerging disinfection method that directly kills microorganisms using light. In contrast with conventional UV sterilization, far-UVC light has antimicrobial capabilities without apparent harm to mammalian cells. This study examines the application of 224 nm far-UVC light delivered from a laser using an optical diffuser towards the goal of protecting aga...

On-chip passive optical diode with low-power consumption.

We propose and experimentally demonstrate an all-silicon passive optical diode with low-power consumption and high nonreciprocal transmission ratios (NTRs) based on cascaded opto-mechanical microring resonators (MRRs). As the oxide substrates of the opto-mechanical MRRs are removed, the nonlinear effects in the free-hanging waveguides could be efficiently activated by low optical powers. The operation principle of the optical diode is based on the asymmetric resonance red-shifts of the two MRRs in the forwa...

Equalization scheme of C-band PAM4 signal for optical amplified 50-Gb/s PON.

The bandwidth limit of devices and the chromatic dispersion (CD) of optical fiber severely distort the high-speed signal in a passive optical network (PON). In this paper, an efficient equalization scheme is proposed for optical amplified 50-Gb/s PAM4-PON with a 10G-class transmitter. The proposed equalization scheme is based on fast frequency domain equalization (FDE) with circular convolution, an optimized post-filter, and a low-complexity maximum likelihood sequence detector (MLSD), which requires only t...

Graphics and Media Technologies for Operators in Industry 4.0.

Visual computing technologies have an important role in manufacturing and production, particularly in new Industry 4.0 scenarios with intelligent machines, human-robot collaboration and learning factories. In this article, we explore challenges and examples on how the fusion of graphics, vision and media technologies can enhance the role of operators in this new context.

Nurse and Nurse Student Attitudes and Perceived Self-efficacy in Use of Information and Communication Technologies: Professional and Cultural Differences.

Information and communication technologies have become essential and design-effective tools in the global healthcare system. Evidence suggests that information and communication technologies can promote nursing practice and patient satisfaction and quality of care. Competency with information and communication technologies is essential for both nurses and nursing students, and attitudes toward its use and perceived self-efficacy are important for implementation in the workplace. This study aimed to explore ...

Microfluidic Based Optical Microscopes on Chip.

Last decade's advancements in optofluidics allowed obtaining an ever increasing integration of different functionalities in lab on chip devices to culture, analyze, and manipulate single cells and entire biological specimens. Despite the importance of optical imaging for biological sample monitoring in microfluidics, imaging is traditionally achieved by placing microfluidics channels in standard bench-top optical microscopes. Recently, the development of either integrated optical elements or lensless imagin...

The Modern Medical Technologies in Orphan Diseases Prevention.

The article covers issues of organization of orphan diseases prevention using modern technologies. The role of preconception training, medical genetic counseling, auxiliary reproductive technologies, prenatal diagnostic and fetal surgery techniques, neonatal screening at particular stages of preventive measures is reflected.

Use of eHealth and mHealth technology by persons with multiple sclerosis.

Health communication has evolved substantially over the last few years as the field of electronic health (eHealth) technologies has emerged. It is unknown what demographic and clinical characteristics are associated with use of eHealth technologies in MS. As these technologies are more widely adopted in health settings, it is important that health care providers understand who is using them, and to recognize potential disparities if they exist.

Comparing the effects of thermal and non-thermal technologies on pomegranate juice quality: A review.

The consumption of pomegranate juice (PJ) has increased substantially since scientific literature reported its therapeutic benefits that are attributable to antioxidant, antimicrobial, anti-carcinogenic, and anti-inflammatory properties. The growing consumer demands for fresh and high-quality food products have led to the interest in non-thermal technologies for preservation of fruit juices. Although thermal pasteurization is the most widely used preservation technology, it has adverse effects on the nutrit...

Rational Design of a LiNbO-Like Nonlinear Optical Crystal LiZrTeO with High Laser-Damage Threshold and Wide Mid-IR Transparency Window.

With existing and emerging technologies urgently demanding the expansion of the laser wavelengths, high-performance nonlinear optical (NLO) crystals are becoming indispensable. Here, a prospective NLO crystal LiZrTeO is rationally designed by the element substitution of Nb for Zr and Te from LiNbO that has been recognized as one of the most commercial NLO crystals. LiZrTeO inherits the structural merits of LiNbO and thus meets the requirements for NLO applications, including noncentrosymmetric crystal struc...

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