The big splash security systems integrators made in the market during the first three quarters of 2008 was tempered by a fourth quarter that looked more like a quiet ripple

Electromagnetic and radio frequency interference (EMI-RFI) can disrupt the performance of sensitive communications systems and devices, potentially compromising confidential data.

The report — fielded in cooperation with Interpret —provides a baseline of the overall smart home market landscape, as well as data collected from a custom quantitative survey of 1,500 U.S.- based smart home device owners. 

The 2024A Z-Wave Specification Package includes several documents that have undergone an Intellectual Property Rights (IPR) review as well as clarifications and fixes.

The use of flavored e-liquids in vaping devices may lead to the formation of nearly 300 different harmful substances, results of a recent study out of Ireland suggest.

Chef Chris Koetke speaks from 43 years of experience as a chef, culinary program instructor and culinary business owner.

Lay's Wavy Tzatziki, Lay's Masala and Lay's Honey Butter flavors, inspired by Greece, India and Korea, are hitting store shelves in the US for a limited time, helping fans experience the tastes of these countries. 

Children's Geographies; 02/01/2023
(AN 163249018); ISSN: 14733285
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The post Heatwave interventions must reduce invisible gendered challenges in the Global South was curated by information for practice.

New Hampshire is seeing more heat waves due to climate change. And staying cool is even harder this year because of COVID-19. Our new climate change reporting project, By Degrees , has this look at how New Hampshire's cities are coping.

[Science] :
Autumn heat is likely to grip the nation on Sunday, the second day of the Chuseok holiday. A heat wave alert was issued for the entire Seoul area at 10 a.m. Sunday, with heat wave warnings issued in western parts of the nation. It marks the first time the capital city saw its heat wave advisory in ...

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[Science] :
This past September set records both for tropical nights and unusually hot daytime weather throughout the country.   According to the Korea Meteorological Administration(KMA) on Tuesday, locations across the nation experienced heat-wave-level temperatures of 33 degrees Celsius or higher over an average ...

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This study examines the quality of charge density obtained by fitting the multipole model to wavefunctions in different basis sets. The complex analysis reveals that changing the basis set quality from double- to triple-zeta can notably improve the charge density related properties of a multipole model.

Large-bandwidth pulses produced by cutting-edge X-ray free-electron lasers (FELs) are of great importance in research fields like material science and biology. In this paper, a new method to generate high-power ultrashort FEL pulses with tunable spectral bandwidth with spectral coherence using a dielectric-lined waveguide without interfering operation of linacs is proposed. By exploiting the passive and dephasingless wakefield at terahertz frequency excited by the beam, stable energy modulation can be achieved in the electron beam and large-bandwidth high-intensity soft X-ray radiation can be generated. Three-dimensional start-to-end simulations have been carried out and the results show that coherent radiation pulses with duration of a few femtoseconds and bandwidths ranging from 1.01% to 2.16% can be achieved by changing the undulator taper profile.

At-wavelength metrology of X-ray optics plays a crucial role in evaluating the performance of optics under actual beamline operating conditions, enabling in situ diagnostics and optimization. Techniques utilizing a wavefront random modulator have gained increasing attention in recent years. However, accurately mapping the measured wavefront slope to a curved X-ray mirror surface when the modulator is downstream of the mirror has posed a challenge. To address this problem, an iterative method has been developed in this study. The results demonstrate a significant improvement compared with conventional approaches and agree with offline measurements obtained from optical metrology. We believe that the proposed method enhances the accuracy of at-wavelength metrology techniques, and empowers them to play a greater role in beamline operation and optics fabrication.

Synchrotron light sources can provide the required spatial coherence, stability and control to support the development of advanced lithography at the extreme ultraviolet and soft X-ray wavelengths that are relevant to current and future fabricating technologies. Here an evaluation of the optical performance of the soft X-ray (SXR) beamline of the Australian Synchrotron (AS) and its suitability for developing interference lithography using radiation in the 91.8 eV (13.5 nm) to 300 eV (4.13 nm) range are presented. A comprehensive physical optics model of the APPLE-II undulator source and SXR beamline was constructed to simulate the properties of the illumination at the proposed location of a photomask, as a function of photon energy, collimation and monochromator parameters. The model is validated using a combination of experimental measurements of the photon intensity distribution of the undulator harmonics. It is shown that the undulator harmonics intensity ratio can be accurately measured using an imaging detector and controlled using beamline optics. Finally, the photomask geometric constraints and achievable performance for the limiting case of fully spatially coherent illumination are evaluated.

Knife-edge imaging is a successful method for determining the wavefront distortion of focusing optics such as Kirkpatrick–Baez mirrors or compound refractive lenses. In this study, the wavefront error of an imperfect elliptical mirror is predicted by developing a knife-edge program using the SHADOW/OASYS platform. It is shown that the focusing optics can be aligned perfectly by minimizing the parabolic and cubic coefficients of the wavefront error. The residual wavefront error provides precise information about the figure/height errors of the focusing optics suggesting it as an accurate method for in situ optical metrology. A Python program is developed to design a customized wavefront refractive corrector to minimize the residual wavefront error. Uniform beam at and out of focus and higher peak intensity are achieved by the wavefront correction in comparison with ideal focusing. The developed code provides a quick way for wavefront error analysis and corrector design for non-ideal optics especially for the new-generation diffraction-limited sources, and saves considerable experimental time and effort.

A reliable `in situ' method for wavefront sensing in the soft X-ray domain is reported, developed for the characterization of rotationally symmetric optical elements, like an ellipsoidal mirror shell. In a laboratory setup, the mirror sample is irradiated by an electron-excited (4.4 keV), micrometre-sized (∼2 µm) fluorescence source (carbon Kα, 277 eV). Substantially, the three-dimensional intensity distribution I(r) is recorded by a CCD camera (2048 × 512 pixels of 13.5 µm) at two positions along the optical axis, symmetrically displaced by ±21–25% from the focus. The transport-of-intensity equation is interpreted in a geometrical sense from plane to plane and implemented as a ray tracing code, to retrieve the phase Φ(r) from the radial intensity gradient on a sub-pixel scale. For reasons of statistical reliability, five intra-/extra-focal CCD image pairs are evaluated and averaged to an annular two-dimensional map of the wavefront error {cal W}. In units of the test wavelength (C Kα), an r.m.s. value sigma_{cal{W}} = ±10.9λ0 and a peak-to-valley amplitude of ±31.3λ0 are obtained. By means of the wavefront, the focus is first reconstructed with a result for its diameter of 38.4 µm, close to the direct experimental observation of 39.4 µm (FWHM). Secondly, figure and slope errors of the ellipsoid are characterized with an average of ±1.14 µm and ±8.8 arcsec (r.m.s.), respectively, the latter in reasonable agreement with the measured focal intensity distribution. The findings enable, amongst others, the precise alignment of axisymmetric X-ray mirrors or the design of a wavefront corrector for high-resolution X-ray science.

In situ wavefront sensing plays a critical role in the delivery of high-quality beams for X-ray experiments. X-ray speckle-based techniques stand out among other in situ techniques for their easy experimental setup and various data acquisition modes. Although X-ray speckle-based techniques have been under development for more than a decade, there are still no user-friendly software packages for new researchers to begin with. Here, we present an open-source Python package, spexwavepy, for X-ray wavefront sensing using speckle-based techniques. This Python package covers a variety of X-ray speckle-based techniques, provides plenty of examples with real experimental data and offers detailed online documentation for users. We hope it can help new researchers learn and apply the speckle-based techniques for X-ray wavefront sensing to synchrotron radiation and X-ray free-electron laser beamlines.

Achieving diffraction-limited performance in fourth-generation synchrotron radiation sources demands monochromator crystals that can preserve the wavefront across an unprecedented extensive range. There is an urgent need for techniques of absolute crystal diffraction wavefront measurement. At the Beijing Synchrotron Radiation Facility (BSRF), a novel edge scan wavefront metrology technique has been developed. This technique employs a double-edge tracking method, making diffraction-limited level absolute crystal diffraction wavefront measurement a reality. The results demonstrate an equivalent diffraction surface slope error below 70 nrad (corresponding to a wavefront phase error of 4.57% λ) r.m.s. within a nearly 6 mm range for a flat crystal in the crystal surface coordinate. The double-edge structure contributes to exceptional measurement precision for slope error reproducibility, achieving levels below 15 nrad (phase error reproducibility < λ/100) even at a first-generation synchrotron radiation source. Currently, the measurement termed double-edge scan (DES) has already been regarded as a critical feedback mechanism in the fabrication of next-generation crystals.

Advances in physics have been significantly driven by state-of-the-art technology, and in photonics and X-ray science this calls for the ability to manipulate the characteristics of optical beams. Orbital angular momentum (OAM) beams hold substantial promise in various domains such as ultra-high-capacity optical communication, rotating body detection, optical tweezers, laser processing, super-resolution imaging etc. Hence, the advancement of OAM beam-generation technology and the enhancement of its technical proficiency and characterization capabilities are of paramount importance. These endeavours will not only facilitate the use of OAM beams in the aforementioned sectors but also extend the scope of applications in diverse fields related to OAM beams. At the FERMI Free-Electron Laser (Trieste, Italy), OAM beams are generated either by tailoring the emission process on the undulator side or, in most cases, by coupling a spiral zone plate (SZP) in tandem with the refocusing Kirkpatrick–Baez active optic system (KAOS). To provide a robust and reproducible workflow to users, a Hartmann wavefront sensor (WFS) is used for both optics tuning and beam characterization. KAOS is capable of delivering both tightly focused and broad spots, with independent control over vertical and horizontal magnification. This study explores a novel non-conventional `near collimation' operational mode aimed at generating beams with OAM that employs the use of a lithographically manufactured SZP to achieve this goal. The article evaluates the mirror's performance through Hartmann wavefront sensing, offers a discussion of data analysis methodologies, and provides a quantitative analysis of these results with ptychographic reconstructions.

The success of experimental phasing in macromolecular crystallography relies primarily on the accurate locations of heavy atoms bound to the target crystal. To improve the process of substructure determination, a modified phase-retrieval algorithm built on the framework of the relaxed alternating averaged reflection (RAAR) algorithm has been developed. Importantly, the proposed algorithm features a combination of the π-half phase perturbation for weak reflections and enforces the direct-method-based tangent formula for strong reflections in reciprocal space. The proposed algorithm is extensively demonstrated on a total of 100 single-wavelength anomalous diffraction (SAD) experimental datasets, comprising both protein and nucleic acid structures of different qualities. Compared with the standard RAAR algorithm, the modified phase-retrieval algorithm exhibits significantly improved effectiveness and accuracy in SAD substructure determination, highlighting the importance of additional constraints for algorithmic performance. Furthermore, the proposed algorithm can be performed without human intervention under most conditions owing to the self-adaptive property of the input parameters, thus making it convenient to be integrated into the structural determination pipeline. In conjunction with the IPCAS software suite, we demonstrated experimentally that automatic de novo structure determination is possible on the basis of our proposed algorithm.

A slit-less wavelength-dispersive spectrometer design using a single-bounce monocapillary that aligns the sample on the Rowland circle, enhancing photon throughput and maintaining resolution. The compact design supports flexibility and reconfiguration in facilities without complex beamline infrastructure, significantly improving detection efficiency.

An implementation of Slater-type spherical scattering factors for X-ray and electron diffraction for elements in the range Z = 1–103 is presented within the software Olex2. Both high- and low-angle Fourier behaviour of atomic electron density and electrostatic potential can thus be addressed, in contrast to the limited flexibility of the four Gaussian plus constant descriptions which are currently the most widely used method for calculating atomic scattering factors during refinement. The implementation presented here accommodates the increasing complexity of the electronic structure of heavier elements by using complete atomic wavefunctions without any interpolation between precalculated tables or intermediate fitting functions. Atomic wavefunctions for singly charged ions are implemented and made accessible, and these show drastic changes in electron diffraction scattering factors compared with the neutral atom. A comparison between the two different spherical models of neutral atoms is presented as an example for four different kinds of X-ray and two electron diffraction structures, and comparisons of refinement results using the existing diffraction data are discussed. A systematic but slight improvement in R values and residual densities can be observed when using the new scattering factors, and this is discussed relative to effects on the atomic displacement parameters and atomic positions, which are prominent near the heavier elements in a structure.

The strong metal–support interaction (SMSI) is a phenomenon observed in supported metal catalyst systems in which reducible metal oxide supports can form overlayers over the surface of active metal nanoparticles (NPs) under a hydrogen (H2) environment at elevated temperatures. SMSI has been shown to affect catalyst performance in many reactions by changing the type and number of active sites on the catalyst surface. Laboratory methods for the analysis of SMSI at the nanoparticle-ensemble level are lacking and mostly based on indirect evidence, such as gas chemisorption. Here, we demonstrate the possibility to detect and characterize SMSIs in Co/TiOx model catalysts using the laboratory X-ray standing wave (XSW) technique for a large ensemble of NPs at the bulk scale. We designed a thermally stable MoNx/SiNx periodic multilayer to retain XSW generation after reduction with H2 gas at 600°C. The model catalyst system was synthesized here by deposition of a thin TiOx layer on top of the periodic multilayer, followed by Co NP deposition via spare ablation. A partial encapsulation of Co NPs by TiOx was identified by analyzing the change in Ti atomic distribution. This novel methodological approach can be extended to observe surface restructuring of model catalysts in situ at high temperature (up to 1000°C) and pressure (≤3 mbar), and can also be relevant for fundamental studies in the thermal stability of membranes, as well as metallurgy.

Propagation-based phase contrast, for example in the form of edge enhancement contrast, is well established within X-ray imaging but is not widely used in neutron imaging. This technique can help increase the contrast of low-attenuation samples but may confuse quantitative absorption measurements. Therefore, it is important to understand the experimental parameters that cause and amplify or dampen this effect in order to optimize future experiments properly. Two simulation approaches have been investigated, a wave-based simulation and a particle-based simulation conducted in McStas [Willendrup & Lefmann (2020). J. Neutron Res. 22, 1–16], and they are compared with experimental data. The experiment was done on a sample of metal foils with weakly and strongly neutron absorbing layers, which were measured while varying the rotation angle and propagation distance from the sample. The experimental data show multiple signals: attenuation, phase contrast and reflection. The wave model reproduces the sample attenuation and the phase peaks but it does not reproduce the behavior of these peaks as a function of rotation angle. The McStas simulation agrees better with the experimental data, as it reproduces attenuation, phase peaks and reflection, as well as the change in these signals as a function of rotation angle and distance. This suggests that the McStas simulation approach, where the particle description of the neutron facilitates the incorporation of multiple effects, is the most convenient way of modeling edge enhancement in neutron imaging.

The increasing structural complexity and downscaling of modern nanodevices require continuous development of structural characterization techniques that support R&D and manufacturing processes. This work explores the capability of laboratory characterization of periodic planar nanostructures using 3D X-ray standing waves as a promising method for reconstructing atomic profiles of planar nanostructures. The non-destructive nature of this metrology technique makes it highly versatile and particularly suitable for studying various types of samples. Moreover, it eliminates the need for additional sample preparation before use and can achieve sub-nanometre reconstruction resolution using widely available laboratory setups, as demonstrated on a diffractometer equipped with a microfocus X-ray tube with a copper anode.

According to one new account of the Trump presidency, even telling the story of President Trump's Covid diagnosis was difficult due to the chaos in the white house. Here, Trump removes his protective mask after being discharged from the Walter Reed National Military Medical Center with Covid-19.; Credit: Bloomberg/Bloomberg via Getty Images

When the Wall Street Journal's Michael Bender wrote his book about Donald Trump's 2020 defeat, one section stuck out as particularly difficult: telling the story of what Bender dubbed "Hell Week-And-A-Half."​

"It was the ten days in 2020 that started with the super spreader event in the Rose Garden, included the Trump's disastrous debate with Joe Biden in Cleveland, and then Trump himself obviously testing positive for COVID a few days later," Bender said.

It's not just that it was a lot to fold together; it's that simply figuring out what happened was maddening.​

"How early he tested positive, how sick he was during that time — I mean, these are serious questions with national security implications that very few people knew or had firsthand knowledge of, and I had competing versions from senior officials, serious people who all were telling me different versions of that story," he said.

Bender's Frankly, We Did Win This Election is one of many books trying to pull order from Trump's chaos, and that struggle to discern the truth, he explains, is itself emblematic of the Trump administration.​

"The deception wasn't just with the public. It was literally from person to person inside the West Wing," he said. "And that's the story — not necessarily worrying about exactly what happened, which will have to come out at some later point, if it ever does."

Former officials are judging Trump's election lies and pandemic response poorly

Judging from the excerpts that have been released, this first wave of post-Trump-presidency books is filled with behind-closed-doors details — like, for example, how gravely ill Trump was with COVID-19, or former Attorney General William Barr's blunt assessment about Trump's claims of a rigged election: "​My suspicion all the way along was that there was nothing there. That it was all bulls***," as ABC's Jonathan Karl recounts.

But the challenge of recounting this chapter of American history is not just about recounting news-making moments — the racist statements, the allegations of sexual assault, the impeachments — but making sense of it.​

Yasmeen Abutaleb, who coauthored the forthcoming Nightmare Scenario with her Washington Post colleague Damian Paletta, agreed that it was hard to discern the truth from dozens of conflicting stories from within the White House.

But that made it all the more striking when they did find consensus on the Trump White House's coronavirus response. "Of the more than 180 people we spoke to, there wasn't a single one who defended the collective response," she said.

Writing this book, she added, allowed her and Paletta to come away with a clearer assessment of the Trump White House's pandemic response than they gleaned from their day-to-day coverage last year.

"Coronavirus was going to be a challenge no matter who was in charge," she said. "But when we looked at the number of opportunities there were to turn the response around, many of which we didn't know about at the time or couldn't learn it at the time, I think we were shocked at the number of opportunities there were and how they weren't taken."

In addition to the challenge of telling complete, ordered stories of a chaotic presidency, there is also the challenge of placing that presidency into historical context, says Princeton presidential historian Julian Zelizer. He's working with a team of historians to pull together a history of the Trump administration.

"Why did America's political system have room for so much chaos over a four year period? Which is this big puzzle I don't think everyone's totally grappled with," he said.

It's not just journalists and historians. Trump-administration insiders will try to explain their place in history. That's according to Keith Urbahn, a co-founder of Javelin, a literary agency that represented Bender, former UN ambassador John Bolton, and former FBI director James Comey, with more to come.​

"I think it does require for people who worked in the Trump presidency to wrestle with some of the moral compromises that they had to make by serving in that administration," he said.

Post-Trump chaos is rippling through the publishing world

Writing the history of a leaky, live-tweeted presidency has been unusual for a variety of additional reasons. There's book industry tumult — Simon and Schuster employees protested the publishing giant over printing former Vice President Mike Pence's book.

In addition, Trump could still run for president again, which may be why he has given at least 22 book interviews, Axios recently reported. (He has also said he is writing the "book of all books," though some major publishers are hesitant about publishing it, Politico has reported.)

The Trump era was also unusual for the book industry in another way.

"We can honestly say that the four years of the Trump administration were four of the strongest years cumulatively for political books since we've been tracking books, which started in 2001," said Kristen McLean, executive director and industry analyst at market research firm NPD.

Now, however, those sales moving back towards a pre-Trump normal — political book sales are down 60% from the second half of 2020, McLean said.

But that doesn't mean interest will disappear, according to Javelin co-founder Matt Latimer.​

"For example, next year there are a dozen or more books coming out about President Nixon," he said. "I mean, I think long after we're all gone, people are going to be trying to figure out what the hell this was all about."

It's been 47 years since Nixon resigned. By that same math, we'll be reading new Trump books into the late 2060s — and probably beyond.

This content is from Southern California Public Radio. View the original story at SCPR.org.

For the last month, Frank Galaviz has wondered when running water will return to his town.

The 77-year-old resident of Teviston — a small rural community in Central California — has been forced to depend on stored and bottled water after the pump in the town's only functioning well broke down in early June. Since then, residents have had to travel to neighboring towns to shower or depend on the town's water storage tanks for their daily needs.

Temperatures continue to reach into triple digits as a brutal heat wave sweeps across the West Coast. The ongoing drought only exacerbates the problem, Galaviz says.

"[My wife and I] have lived through many challenges," he says. "We both have survived cancer, but we will not be able to survive without water. This is a problem that is not going away."

Teviston sits between the cities of Fresno and Bakersfield in the San Joaquin Valley and is home to mostly Latino farmworkers. Normal days in town are usually slow-paced and idyllic, Galaviz says, with many residents commuting to the nearby towns and cities on business. Now, they leave to find more water.

This is not the first time Galaviz or his neighbors have struggled with a broken well. He says two other wells had broken down in previous years and had not been repaired. A new, more modern well is in the works, but Galaviz estimates its completion is still a few years off.

The community continues waiting for repair parts to arrive in hopes it will fix the current well's pump, he added, a process that could take a few weeks.

"It is not normal to not be able to flush toilets," he says. "It's not normal to not be able to take a shower."

Residents have managed to come up with a temporary fix, using their water storage tanks to offer relief.

"We were able to get some of the water pressure back," Galaviz said. "We put a submersible pump into one of our old wells and we're forcing water from the storage tanks through that system. But it's not a permanent fix."

Rural Latino communities in California have been particularly vulnerable to drought conditions, according to a report from the state Legislative Analyst's Office.

"Having no water equals bad health," state Sen. Melissa Hurtado, who serves California's 14th District, tells Weekend Edition. Hurtado says her bill, SB 559, would allot $785 million to fund and repair water supply infrastructure. One of the waterways posed for fixing is the Friant-Kern canal, which supplies Teviston and the towns around it. Over the years, the canal has become subject to subsidence — a condition that has caused some parts of the canal to sink and means it can't deliver as much water.

"SB 559 would help fix the canal so that the basin and the communities that rely on water here would be able to have more access to it," Hurtado says.

Galaviz has spent the last few weeks knocking on doors to check in on neighbors and trying to organize help.

"I have a neighbor whose daughter has medical problems. She needs drinking water, pure water," he says. "It hurts to see people suffering."

Hafsa Fathima and Jan Johnson produced and edited the audio story.

This content is from Southern California Public Radio. View the original story at SCPR.org.

This week the National Oceanic and Atmospheric Administration predicted an above-normal 2020 hurricane season, with the possibility of three to six major hurricanes this summer looming over millions of Americans.

The digital services will reduce the turn-around time of the bank guarantee issuance and delivery to the beneficiary from an industry average of 3-4 working days to a few minutes.

LinkedIn, which has 20,000 employees, has grown revenue each quarter during the last year, but it joins other major technology companies including its parent in laying off workers amid a weakening global economic outlook.

Made from kelp, the new snack promises an ocean of flavor and health benefits.

The sweet-and-savory snack joins the producer’s Classic Butter and Extra Butter popcorn varieties already on shelves.

EnWave Corp. announced that it has signed an Equipment Purchase Agreement with Dole Worldwide Food & Beverage Group to supply a 120kW Radiant Energy Vacuum dehydration processing line that will materially increase Dole’s vacuum-microwave processing capabilities.

According to the January 2015 “Gluten-Free Foods in the U.S., 5th Edition” report from Packaged Facts, Rockville, MD, from 2009–2014, sales of gluten-free products in grain-based categories posted a 34 percent compound annual growth rate (CAGR).

In the United States, bidet sales have grown steadily at a year-over-year rate of 14% to 15%. According to Stephanie Ewing, director, Wholesale North America for Bemis Manufacturing Co., specifying bidets is “becoming a market need driven by market demand. The pandemic started the trend of increased consumer awareness that a solution other than toilet paper was available, as well as an increased focus on hygiene.”

Those with a big picture view of trends in occupational safety and health all agree on one prediction: How safety is practiced in the workplace will change dramatically in the next five years.

BZBGEAR is proud to be part of the Worship Audio Visual Experience Conference and Expo—bringing together leading manufacturers and church experts to help grow engagement and devotion.

Kent Home automation experts are exhibiting at the Farnborough Homebuilding & Renovating Show

Kent home cinema installers partner with Together for Cinema

Kent smart home specialist open a new Control4 Certified showroom

Dr. Darren Elenburg is happy to be using Extra Corporeal Pulse Activation Treatment (EPAT), a noninvasive procedure to treat his patients with chronic heel pain.

Academy Award-nominated actor Josh Brolin narrates "Ground Swell: The Other Side of Fear" feature documentary heading to movie theaters starring the best big wave surfers in the world, including the 100-foot wave from Nazare, Portugal!

Wave Company's conductive silicone electrode is only 0.78mm 15mm in addition to theincluding fabric, making it the thinnest and most flexible productelectrode.

Wava Truscott, PhD, MBA, channels years of expertise into her work Truscott MedSci Associates, LLC

Jonathan Block Ascends to Co-CEO at BrainTap, Pioneers in Brainwave Optimization

Jonathan Block Ascends to Co-CEO at BrainTap, Pioneers in Brainwave Optimization

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