Armed men suspected to be bandits, on Tuesday, attacked the site of the ongoing construction of the 330/132/33kV transmission substation in Obajana, Kogi State. The armed men, shooting sporadically, destroyed a 150MVA 330/132/33kV power transformer, causing a significant setback to the government’s efforts to increase power generation. The Transmission Company of Nigeria disclosed the latest

The Swanson School of Engineering will develop an improved HVDC converter with the Department of Energy's funds.

The expansion aims to double the facility’s size, creating 167 new jobs, and enhance production capacity for automatic transmissions in response to growing global demand

Emerging Markets and Developing Economies (EMDE) have been driving the growth in electricity grid length with rapid expansion from 2001, on increasing electrification. China leads the incremental transmission network put up in the last decade while India leads on the distribution side. India leads in Technical grid losses in T&D when compared with other countries. High-Voltage Direct Current (HVDC) transmission lines, thus, emerge as the most preferred transmission lines considering their lower losses and their suitability for long-distance power transfer

Hi All, total newbie to car maintenance here - just changed my oil for the first time on my 2016 Fit EX, standard transmission. No issues with the oil change, but while I was under there I noticed a...

Has anyone put the GE fit auto trans half shaft on a manual tans car? Seems to be a good way to reduce torque steer. I will need to make custom driveshafts for my project anyways so that’s not an...

Many on Twitter are not to keen on the possibility

File transfer is always handled by a separate service, sometimes it is a third-party service in videoconferencing. When sending files during a video session, file data flow and video stream are independent of each other. Encryption is a mature method to ensure file security. However, it still has the chance to leave footprints on the intermediate forwarding machines. These footprints can indicate that a file once passed through, some protocol-related logs give clues to the hackers' later investigation. This work proposes a file-sending scheme through the video stream using blockchain and steganography. Blockchain is used as a file slicing and linkage mechanism. Steganography is applied to embed file pieces into video frames that are continuously generated during the session. The scheme merges files into the video stream with no file transfer protocol use and no extra bandwidth consumed by the file to provide trackless file transmission during the video communication.

Los Angeles — Adverse working conditions at fast-food restaurants – as well as worker and customer failure to comply with physical distancing and mask-wearing protocols – may put fast-food employees in Los Angeles at greater risk of contracting COVID-19, according to a recently released report from the University of California, Los Angeles and UC Berkeley.

Falls Church, VA — Former OSHA administrator David Michaels is among more than a dozen health and safety experts calling on the Biden administration to update and strengthen Centers for Disease Control and Prevention guidance to help prevent COVID-19 transmission.

Adelaide, Australia — Open toilet lids, defective plumbing drains and uncovered trash cans may increase the risk of bacterial and viral disease transmission in public restrooms, according to a recent research review.

The correct determination of X-ray transmission at X-ray nanoprobes equipped with small beamstops for small- and wide-angle X-ray scattering collection is an unsolved problem with huge implications for data correction pipelines. We present a cost-effective solution to detect the transmission via the X-ray fluorescence of the beamstop with an avalanche photodiode.

Quantitative X-ray diffraction approaches require careful correction for sample transmission. Though this is a routine task at state-of-the-art small-angle X-ray scattering (SAXS), wide-angle X-ray scattering (WAXS) or diffraction beamlines at synchrotron facilities, the transmission signal cannot be recorded concurrently with SAXS/WAXS when using the small, sub-millimetre beamstops at many X-ray nanoprobes during SAXS/WAXS experiments due to the divergence-limited size of the beamstop and the generally tight geometry. This is detrimental to the data quality and often the only solution is to re-scan the sample with a PIN photodiode as a detector to obtain transmission values. In this manuscript, we present a simple yet effective solution to this problem in the form of a small beamstop with an inlaid metal target for optimal fluorescence yield. This fluorescence can be detected with a high-sensitivity avalanche photodiode and provides a linear counter to determine the sample transmission.

The use of hard X-ray transmission nano- and microdiffraction to perform in situ stress and strain measurements during deformation has recently been demonstrated and used to investigate many thin film systems. Here a newly commissioned sample environment based on a commercially available nanoindenter is presented, which is available at the NanoMAX beamline at the MAX IV synchrotron. Using X-ray nanoprobes of around 60–70 nm at 14–16 keV and a scanning step size of 100 nm, we map the strains, stresses, plastic deformation and fracture during nanoindentation of industrial coatings with thicknesses in the range of several micrometres, relatively strong texture and large grains. The successful measurements of such challenging samples illustrate broad applicability. The sample environment is openly accessible for NanoMAX beamline users through the MAX IV sample environment pool, and its capability can be further extended for specific purposes through additional available modules.

X-ray spectroscopy is a valuable technique for the study of many materials systems. Characterizing reactions in situ and operando can reveal complex reaction kinetics, which is crucial to understanding active site composition and reaction mechanisms. In this project, the design, fabrication and testing of an open-source and easy-to-fabricate electrochemical cell for in situ electrochemistry compatible with X-ray absorption spectroscopy in both transmission and fluorescence modes are accomplished via windows with large opening angles on both the upstream and downstream sides of the cell. Using a hobbyist computer numerical control machine and free 3D CAD software, anyone can make a reliable electrochemical cell using this design. Onion-like carbon nanoparticles, with a 1:3 iron-to-cobalt ratio, were drop-coated onto carbon paper for testing in situ X-ray absorption spectroscopy. Cyclic voltammetry of the carbon paper showed the expected behavior, with no increased ohmic drop, even in sandwiched cells. Chronoamperometry was used to apply 0.4 V versus reversible hydrogen electrode, with and without 15 min of oxygen purging to ensure that the electrochemical cell does not provide any artefacts due to gas purging. The XANES and EXAFS spectra showed no differences with and without oxygen, as expected at 0.4 V, without any artefacts due to gas purging. The development of this open-source electrochemical cell design allows for improved collection of in situ X-ray absorption spectroscopy data and enables researchers to perform both transmission and fluorescence simultaneously. It additionally addresses key practical considerations including gas purging, reduced ionic resistance and leak prevention.

This work investigates the performance of the electrospray aerosol generator at the European X-ray Free Electron Laser (EuXFEL). This generator is, together with an aerodynamic lens stack that transports the particles into the X-ray interaction vacuum chamber, the method of choice to deliver particles for single-particle coherent diffractive imaging (SPI) experiments at the EuXFEL. For these experiments to be successful, it is necessary to achieve high transmission of particles from solution into the vacuum interaction region. Particle transmission is highly dependent on efficient neutralization of the charged aerosol generated by the electrospray mechanism as well as the geometry in the vicinity of the Taylor cone. We report absolute particle transmission values for different neutralizers and geometries while keeping the conditions suitable for SPI experiments. Our findings reveal that a vacuum ultraviolet ionizer demonstrates a transmission efficiency approximately seven times greater than the soft X-ray ionizer used previously. Combined with an optimized orifice size on the counter electrode, we achieve >40% particle transmission from solution into the X-ray interaction region. These findings offer valuable insights for optimizing electrospray aerosol generator configurations and data rates for SPI experiments.

Errors in variable subscripts, equations and Fig. 8 in Section 3.2 of the article by Lotze et al. [(2024). J. Synchrotron Rad. 31, 42–52] are corrected.

Here, a morphologically based approach is used for the in situ characterization of 3D growth rates of facetted crystals from the solution phase. Crystal images of single crystals of the β-form of l-glutamic acid are captured in situ during their growth at a relative supersaturation of 1.05 using transmission optical microscopy. The crystal growth rates estimated for both the {101} capping and {021} prismatic faces through image processing are consistent with those determined using reflection light mode [Jiang, Ma, Hazlehurst, Ilett, Jackson, Hogg & Roberts (2024). Cryst. Growth Des. 24, 3277–3288]. The growth rate in the {010} face is, for the first time, estimated from the shadow widths of the {021} prismatic faces and found to be typically about half that of the {021} prismatic faces. Analysis of the 3D shape during growth reveals that the initial needle-like crystal morphology develops during the growth process to become more tabular, associated with the Zingg factor evolving from 2.9 to 1.7 (>1). The change in relative solution supersaturation during the growth process is estimated from calculations of the crystal volume, offering an alternative approach to determine this dynamically from visual observations.

The design and first results of a high-transmission soft X-ray spectrometer operated at the X-SPEC double-undulator beamline of the KIT Light Source are presented. As a unique feature, particular emphasis was placed on optimizing the spectrometer transmission by maximizing the solid angle and the efficiencies of spectrometer gratings and detector. A CMOS detector, optimized for soft X-rays, allows for quantum efficiencies of 90% or above over the full energy range of the spectrometer, while simultaneously offering short readout times. Combining an optimized control system at the X-SPEC beamline with continuous energy scans (as opposed to step scans), the high transmission of the spectrometer, and the fast readout of the CMOS camera, enable the collection of entire rapid resonant inelastic soft X-ray scattering maps in less than 1 min. Series of spectra at a fixed energy can be taken with a frequency of up to 5 Hz. Furthermore, the use of higher-order reflections allows a very wide energy range (45 to 2000 eV) to be covered with only two blazed gratings, while keeping the efficiency high and the resolving power E/ΔE above 1500 and 3000 with low- and high-energy gratings, respectively.

New State food rules recently put in place are expected to enforce safe food handling and reduce transmission of food-borne illness.

Efforts to control brucellosis in the Greater Yellowstone Area (GYA) should focus on reducing the risk of transmission from elk, which are now viewed as the primary source of the infection in new cases occurring in cattle and domestic bison, says a new report by the National Academies of Sciences, Engineering, and Medicine.

This summer, as COVID-19 continued its spread across the U.S., the National Academies brought together engineers, virologists, public health experts, and others for a meeting to dive into the rapidly evolving science of COVID-19 airborne transmission.

Two years ago, a research team led by the University of Oxford revealed that, when plucked like a guitar string, spider silk transmits vibrations across a wide range of frequencies, carrying information about prey, mates and even the structural integrity of a web.

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New ETSI group to develop standardization framework for secure smartphone-based proximity tracing systems, helping to break COVID-19 transmission chains

Sophia Antipolis, 12 May 2020

In response to the global coronavirus pandemic, the new ETSI Industry Specification Group “Europe for Privacy-Preserving Pandemic Protection” (ISG E4P) has been established to provide a standardization framework that will enable developers to build interoperable mobile apps for proximity detection and anonymous identification.

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The Philadelphia musician wanted to reconnect with his tight-knit circle of bandmates on his new record.

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The objective of the site inspection and test plan for testing and commissioning is to establish a comprehensive framework for conducting site testing and commissioning activities. It’s as simple as that! The site testing and commissioning of a transmission or... Read more

The post Dos and don’ts in site testing and commissioning distribution and transmission plants appeared first on EEP - Electrical Engineering Portal.

The protection and fault clearance requires great attention. In terms of fault clearance protection, we categorize the relays into main protection relays and backup protection relays. The main protection relay is installed at all primary equipment, and it is essential... Read more

The post The art of fault clearance in transmission systems: The logic of main and backup relays appeared first on EEP - Electrical Engineering Portal.

Methods for subjective determination of transmission quality

Measurements to be made before the line-up period that precedes a television transmission

Multiple destination television transmissions and coordination centres

Definitions for application to international television transmissions

Monitoring the transmission

Maximum permissible power during an international sound-programme transmission

Measurements to be made during the line-up period that precedes a sound-programme transmission

Essential transmission performance objectives for international sound-programme centres (ISPC)

Tests to be made during the line-up period that precedes a television transmission

Monitoring television transmissions - Use of the field blanking interval

Definitions for application to international sound-programme and television-sound transmission

Maintenance of international videoconference systems operating at transmission bit rates of 1544 and 2048 kbit/s

Line-up and service commissioning of international videoconference systems operating at transmission bit rates of 1544 and 2048 kbit/s

Monitoring television transmissions. Use of the field blanking interval

Line-up and service commissioning of international videoconference systems operating at transmission bit rates of 1544 and 2048 kbit/s

Maintenance of international videoconference systems operating at transmission bit rates of 1544 and 2048 kbit/s

Definitions for application to international sound-programme transmissions

Tests to be made during the line-up period that precedes a television transmission

GSTR-SDM - Optical fibre, cable, and components for space division multiplexing transmission

JSTR-OPTR - Optimizing bit rates and transmission resolution by considering display characteristics and available bandwidth

TR.NCDP - Session-layer network coding protocol for multicast data transmission

Terms, definitions and acronyms for television and sound transmission and integrated broadband cable networks

Conversion of type length value packet and transport stream for advanced cable transmission systems