Moss growing on urban trees is a useful bio-indicator of cadmium air pollution in Portland, Oregon, a U.S. Forest Service Pacific Northwest Research Station-led study has found. The work—the first to use moss to generate a rigorous and detailed map of air pollution in a U.S. city—is published online in the journal Science of the Total Environment.

Epiphytic lichens are bioindicators of climate, air quality, and other forest conditions and may reveal how forests will respond to global changes in the U.S. Pacific States of Alaska, Washington, Oregon, and California. We explored climate indication with lichen communities surveyed by using both the USDA Forest Service Forest Inventory and Analysis (FIA) and Alaska Region (R10) methods. Across the Pacific States, lichen indicator species and ordination “climate scores” reflected associations between lichen community composition and climate. Indicator species are appealing targets for monitoring, while climate scores at sites resurveyed in the future can indicate climate change effects.

The Fuel Reduction Cost Simulator (FRCS) spreadsheet application is publicdomain software used to estimate costs for fuel reduction treatments involving removal of trees of mixed sizes in the form of whole trees, logs, or chips from a forest. Equipment production rates were developed from existing studies. Equipment operating cost rates are from December 2002 prices for new equipment and wage rates for the Pacific Northwest. These cost assumptions can be modified by the user. There are four ground-based systems, four cable systems, and two helicopter systems. Cost estimates are in U.S. dollars per 100 cubic feet, per green ton, and per acre.

Another AM station is proposing to run testing of all-digital broadcasting, with BRIAN R. WALSH filing an STA request to operate Oldies WIOE-A/FORT WAYNE in full-time HD RADIO MA3 mode with … more

BLACKENED/Q PRIME rockers METALLICA and drummer LARS ULRICH have reached out to fans with  a message of encouragement on the band’s new SIRIUSXM  MANDATORY METALLICA … more

Wil is widely recognized as one of the original celebrity bloggers, and is a respected voice in the blogging community. His blog WWdN has been voted “Best Celebrity Weblog” by Forbes.com, one of the 100 most influential blogs by C|Net,...

Today, more than patient advocacy, medical and public health organizations sent a letter to senior Trump Administration officials, appealing to the Administration to take immediate action to alleviate the critical shortage across the nation ventilators...

An intimate account of one young girl’s harrowing experience and miraculous survival.

DALLAS, 3 de abril del 2020 – Debido al esfuerzo de médicos, científicos e investigadores de todo el mundo por comprender la pandemia del coronavirus (COVID-19), la American Heart Association está desarrollando un nuevo registro para agregar datos y...

Growing up on the Greenfield family farm outside a little town of 500, we worked hard and learned to look out for one another.

I’ve visited with folks in every corner of Iowa during my U.S. Senate campaign. The people I hear from want the dignity of providing for their families, and to know they can get a hand up when they need it. Now, as the coronavirus threatens our communities and Washington seems more focused on pointing fingers than getting results, Iowans want to know that we can get through this and come out stronger in the end. I’ve been through tough times, and I know from my own life that the only way we get through is by pulling together.

I was 24 when my first husband, an electrical worker, was killed in a workplace accident. Social Security and hard-earned union benefits helped me get back on my feet and pursue a career where I could support my two young sons. I’ll fight to protect and strengthen Social Security so every Iowan can get that same hand up.

So, I know what it’s like to have a loved one not come home from work. When I hear about workers having to choose between staying home safely or earning a paycheck, I say no way. Since March, I’ve put out two plans calling for more testing, personal protective equipment, paid sick leave, premium pay, and stronger protections for our front-line workers.

I also believe health care is a right — not a privilege. This shouldn’t be partisan.

As a businesswoman and a mom, I know the tough decisions our small businesses and families are making right now. That’s why I’ve called for more urgent economic aid and faster help for our small businesses and workers — not more bailouts for corporate CEOs. We also need a robust infrastructure plan and to invest in more skills training to create opportunity in all of our hometowns.

None of this will happen unless we make Washington work more like we do by ending political corruption. I’m not taking a dime of corporate PAC money and I will work to overturn Citizens United, and ban dark money and corporate PACs.

Sen. Joni Ernst broke her promise to be different. Instead, she’s voted with Mitch McConnell and her corporate PAC donors for tax breaks to corporations and the wealthiest — while hardworking Iowans fall further behind.

Iowans deserve a senator who shares their grit and their resolve, who will carry the fight for our small towns and our working families in her heart. It’s how we get through this pandemic and how we create more opportunity for our state. In the Senate, I’ll never forget where I’m from or who I’m fighting for, and I’ll always put Iowa first.

Theresa Greenfield is a candidate in the Democratic primary for U.S. Senate.

I’m running for Iowa’s 2nd district seat in the U.S. House of Representatives. Early last fall, I found that Mariannette Miller-Meeks is running again, after three losses, and that former Illinois Congressman Bobby Schilling is an Illinoisan turned Iowan. The second district seat should be held by a true Iowa citizen legislator.

The House of Representatives was meant to be the people’s house. One where people temporarily left their home and family to serve in Washington, then returned home to resume their life. Being elected to office was never intended to be a lifetime job. If elected I will serve three terms, then return to Iowa and the private sector.

I believe our government should be small, efficient and responsive to its citizens. I would insist that all government programs are reviewed and eliminated if they are not currently serving the public’s interests. I would also push for a budget that does not grow at a higher rate than incoming revenues.

I believe that all law-abiding citizens have the right to own a gun to hunt or to protect themselves from danger. I will not support any additional restrictions placed on law-abiding citizens.

I believe all life is sacred, from conception to natural death, regardless of ability. It is not my intention to tell any woman what to do with her body. I would prefer that each women take full control of her body and the choices she makes before pregnancy occurs.

In the beginning, our country was land rich and people poor. Anyone who could make it to our country was welcome and opportunities abounded. Today, we are crowded and too many struggle to find substantial work. Immigrants are welcome, but I support only legal immigration, to mitigate how many enter the United States, while our county exercises its right to defend its borders by reasonable means, including strengthening barriers to illegal entry.

I grew up in Washington, Iowa and moved to Iowa City in my late 20s. I currently work in retail and my wife works at a food distribution plant. We have two children, ages 11 and 9, who attend public school in Iowa City. On any given day you could see me at the grocery store, the mall, at the children’s school or at their soccer game. I will be a true citizen-legislator and I would like your support.

Tim Borchardt is a candidate in the Republican primary for Iowa’s 2nd Congressional District.

Using a local server environment will save you a bunch of time if you regularly develop new WordPress websites. Local development has many advantages – it’s faster and more secure than constantly uploading files to a server.

Four Republican senators closely allied with President Donald Trump are urging him to suspend all new guest worker visas for 60 days, and to suspend other types of worker visas including those for advanced skills sought by the technology industry, until unemployment in the United States “has returned to normal levels.”

The senators, who include Iowa’s Chuck Grassley, said that Trump’s April 22 order suspending most immigrant visas for 60 days doesn’t go far enough.

While Trump suspended the issuing of new green cards for would-be U.S. permanent residents, they want visas affecting skilled workers, agriculture workers and others to face curbs.

“Given the extreme lack of available jobs for American job-seekers as portions of our economy begin to reopen, it defies common sense to admit additional foreign guest workers to compete for such limited employment,” wrote the senators, who also include Tom Cotton of Arkansas, Ted Cruz of Texas and Josh Hawley of Missouri.

The letter was reported earlier by Politico.

The letter from some of the Senate’s most prominent immigration hard-liners could put new pressure on the president to expand his executive order, which drew criticism from business, civil rights and immigrant rights groups who said it would keep companies from hiring critical workers and could prevent family reunification.

The president said at the time there would be carve-outs for migrant agricultural workers, and promised to make it even easier for farmers rebounding from the coronavirus crisis to hire labor from other countries.

The order exempts individuals seeking to permanently enter the country as a medical professional or researcher, as well as members of the armed forces, those seeking asylum or refugee status, and children being adopted by American parents.

In their letter, the senators said Trump should go much further by suspending all new guest worker visas for 60 days.

“Exceptions to this suspension should be rare, limited to time-sensitive industries such as agriculture, and issued only on a case-by-case basis when the employer can demonstrate that they have been unable to find Americans to take the jobs,” they wrote.

After the 60 days, they said, Trump should continue to suspend new non-immigrant guest workers for one year or until U.S. unemployment returns to “normal levels.”

That should include H-1B visas for highly skilled workers in the technology and other industries, H-2B visas for non-agricultural seasonal workers and those in the Optional Practical Training Program that extends visas of foreign students after they graduate.

About three-quarters of H-1B visas go to people working in the technology industry, though the exact levels vary year by year.

They also called on Trump to suspend the EB-5 immigrant visa program “effective immediately,” calling it “plagued by scandal and fraud” and in need of change.

EB-5 visas allow immigrant investors to qualify for a green card by investing at least $900,000 in a business that will employ at least 10 Americans.

https://mitchum.blog/building-a-crossword-puzzle-generator-with-javascript/

In today’s Adobe Illustrator tutorial I’m going to take you through the process of creating a colourful embroidered patch, based on the kinds of designs associated with National Parks. The artwork will incorporate a landscape scene at sunset, which helps to keep the design simple with a silhouette graphic and a warm colour palette. Stick […]

The post Video Tutorial: How to Create an Embroidered Patch Design in Illustrator appeared first on Spoon Graphics.

Summer is in full swing here in the states! It’s a perfect time to grab your skateboard and go cruising. Today we’re going to learn how to design flat skateboards and colorful vector longboards in Adobe Illustrator! We’ll be working with Clipping Masks, Stroke, and Pathfinder panel. Let’s get started! Tutorial Details Program: Adobe Illustrator CC Difficulty: […]

The post 10 Step Tutorial: How to Design Flat Skateboards Using Adobe Illustrator appeared first on Vectips.

Welcome back to another Illustrator tutorial from our retro hardware series! In this how-to, we’re going to learn to create a NAS Icon (or a Network-Attached Storage icon) using some simple geometric shapes and tools. So, get your software up and running let’s jump straight into it! Tutorial Details: How to Create a NAS Icon Program: Adobe […]

The post Create a NAS Icon in Just 30 Minutes Using Adobe Illustrator appeared first on Vectips.

In this tutorial we’ll draw a funny cartoon car in a simple stylized flat car. We don’t actually need any advanced drawing skills or even a tablet to create this stylized object as we’ll be working with basic geometric shapes and the most useful tools of Adobe Illustrator. Such simple and trendy illustrations are perfect […]

The post How to Draw a Stylized Flat Car in Adobe Illustrator appeared first on Vectips.

Want to master the elevator pitch and leave a great first impression? Use this easy formula to help communicate what you do in a concise pitch!

Welcome back to another Adobe Illustrator based tutorial, in which we're going to take a close look behind the process of creating a simple iPhone icon, using nothing more than some basic geometric shapes that we're going to adjust here and there. 1. Set Up a New Project File As with any new project, we’re […]

The post Illustrator Tutorial: How to Create an iPhone Icon appeared first on Bittbox.

In today’s tutorial, we're going to take a close look behind the process of creating a simple computer icon, and see how easy it is to build one of our one using nothing more than some basic geometric shapes. 1. Set Up a New Project File As with any new project, we’re going to kick […]

The post Illustrator Tutorial: How to Create a Simple Computer Icon appeared first on Bittbox.

In today’s tutorial, we’re going to take an in-depth look behind the process of creating a folder icon, and see how easy it is to build one from scratch using nothing more than a couple of basic geometric shapes, which we’re going to adjust here and there. So, assuming you already have Illustrator up and […]

The post Illustrator Tutorial: How to Create a Folder Icon appeared first on Bittbox.

Welcome back to another Illustrator based tutorial, in which we’re going to learn how to create a simple watch icon, using nothing more than a couple of basic geometric shapes and tools. So, assuming you already have the software running in the background, bring it up and let’s jump straight into it! 1. Set Up […]

The post Illustrator Tutorial: How to Create a Watch Icon appeared first on Bittbox.

Welcome back to another Illustrator based tutorial, in which we’re going to take a close look behind the process of creating an incognito icon, using nothing more than a couple of simple shapes and tools. So, assuming you already have the software running in the background, bring it up and let’s jump straight into it! […]

The post Illustrator Tutorial: How to Create an Icognito Icon appeared first on Bittbox.

In today’s tutorial, we’re going to take a quick look at the process of creating an Ice Cream icon, and learn how easy it is to build one from scratch using nothing more than a couple of basic geometric shapes that we’re going to adjust here and there. So, assuming you already have the software […]

The post Illustrator Tutorial: How to Create an Ice Cream icon appeared first on Bittbox.

n today’s tutorial, we’re going to take a quick look behind the process of creating a notification bell icon, and see how easy it is to do so using nothing more than a couple of basic geometric shapes and tools. So, assuming you already have the software up and running, let’s jump straight into it! […]

The post Illustrator Tutorial: How to Create a Notification Bell Icon appeared first on Bittbox.

Welcome back to another Illustrator based tutorial, in which we’re going to learn how to create a recycle bin notification icon, using nothing more than a couple of basic geometric shapes that we’re going to adjust here and there. So, assuming you already have the software running in the background, bring it up and let’s […]

The post Illustrator Tutorial: How to Create a Recycle Bin Notification Icon appeared first on Bittbox.

My book Creative Calling is out! Thanks for all your love, support, and help getting it out into the world. We kicked off celebrations in Seattle with over 700 people in attendance to talk about Creativity with my good buddy, Humans of New York creator, Brandon Stanton. I recorded the session for you. Hope you enjoy! FOLLOW HUMANS OF NEW YORK: instagram | twitter | website Listen to the Podcast Subscribe   This podcast is brought to you by CreativeLive. CreativeLive is the world’s largest hub for online creative education in photo/video, art/design, music/audio, craft/maker, money/life and the ability to make a living in any of those disciplines. They are high quality, highly curated classes taught by the world’s top experts — Pulitzer, Oscar, Grammy Award winners, New York Times best selling authors and the best entrepreneurs of our times.

The post Imagine What’s Possible – On Stage /w Humans of New York Creator Brandon Stanton appeared first on Chase Jarvis Photography.

In this article, we characterize nearly invariant subspaces of finite defect for the backward shift operator acting on the vector-valued Hardy space which is a vectorial generalization of a result of Chalendar-Gallardo-Partington (C-G-P). Using this characterization of nearly invariant subspace under the backward shift we completely describe the almost invariant subspaces for the shift and its adjoint acting on the vector valued Hardy space.

An inverse spectral problem for the Sturm-Liouville operator with a singular potential from the class $W_2^{-1}$ is solved by the method of spectral mappings. We prove the uniqueness theorem, develop a constructive algorithm for solution, and obtain necessary and sufficient conditions of solvability for the inverse problem in the self-adjoint and the non-self-adjoint cases

In this article, we prove that the completeness of the Hamilton flow and essential self-dajointness are equivalent for real principal type operators on the circle. Moreover, we study spectral properties of these operators.

This paper deals with an optimal control problem associated to the Kuramoto model describing the dynamical behavior of a network of coupled oscillators. Our aim is to design a suitable control function allowing us to steer the system to a synchronized configuration in which all the oscillators are aligned on the same phase. This control is computed via the minimization of a given cost functional associated with the dynamics considered. For this minimization, we propose a novel approach based on the combination of a standard Gradient Descent (GD) methodology with the recently-developed Random Batch Method (RBM) for the efficient numerical approximation of collective dynamics. Our simulations show that the employment of RBM improves the performances of the GD algorithm, reducing the computational complexity of the minimization process and allowing for a more efficient control calculation.

The article is devoted to the expansion of iterated Stratonovich stochastic integrals of arbitrary multiplicity $k$ $(kinmathbb{N})$ based on the generalized iterated Fourier series. The case of Fourier-Legendre series as well as the case of trigonotemric Fourier series are considered in details. The obtained expansion provides a possibility to represent the iterated Stratonovich stochastic integral in the form of iterated series of products of standard Gaussian random variables. Convergence in the mean of degree $2n$ $(nin mathbb{N})$ of the expansion is proved. Some modifications of the mentioned expansion were derived for the case $k=2$. One of them is based of multiple trigonomentric Fourier series converging almost everywhere in the square $[t, T]^2$. The results of the article can be applied to the numerical solution of Ito stochastic differential equations.

We study the bi-commutators $[T_1, [b, T_2]]$ of pointwise multiplication and Calder'on-Zygmund operators, and characterize their $L^{p_1}L^{p_2} o L^{q_1}L^{q_2}$ boundedness for several off-diagonal regimes of the mixed-norm integrability exponents $(p_1,p_2) eq(q_1,q_2)$. The strategy is based on a bi-parameter version of the recent approximate weak factorization method.

We develop a distributional framework for the shearlet transform $mathcal{S}_{psi}colonmathcal{S}_0(mathbb{R}^2) omathcal{S}(mathbb{S})$ and the shearlet synthesis operator $mathcal{S}^t_{psi}colonmathcal{S}(mathbb{S}) omathcal{S}_0(mathbb{R}^2)$, where $mathcal{S}_0(mathbb{R}^2)$ is the Lizorkin test function space and $mathcal{S}(mathbb{S})$ is the space of highly localized test functions on the standard shearlet group $mathbb{S}$. These spaces and their duals $mathcal{S}_0^prime (mathbb R^2),, mathcal{S}^prime (mathbb{S})$ are called Lizorkin type spaces of test functions and distributions. We analyze the continuity properties of these transforms when the admissible vector $psi$ belongs to $mathcal{S}_0(mathbb{R}^2)$. Then, we define the shearlet transform and the shearlet synthesis operator of Lizorkin type distributions as transpose mappings of the shearlet synthesis operator and the shearlet transform, respectively. They yield continuous mappings from $mathcal{S}_0^prime (mathbb R^2)$ to $mathcal{S}^prime (mathbb{S})$ and from $mathcal{S}^prime (mathbb S)$ to $mathcal{S}_0^prime (mathbb{R}^2)$. Furthermore, we show the consistency of our definition with the shearlet transform defined by direct evaluation of a distribution on the shearlets. The same can be done for the shearlet synthesis operator. Finally, we give a reconstruction formula for Lizorkin type distributions, from which follows that the action of such generalized functions can be written as an absolutely convergent integral over the standard shearlet group.

In cite{S 2017}, Suh gave a non-existence theorem for Hopf real hypersurfaces in the complex quadric with parallel normal Jacobi operator. Motivated by this result, in this paper, we introduce some generalized conditions named $mathcal C$-parallel or Reeb parallel normal Jacobi operators. By using such weaker parallelisms of normal Jacobi operator, first we can assert a non-existence theorem of Hopf real hypersurfaces with $mathcal C$-parallel normal Jacobi operator in the complex quadric $Q^{m}$, $m geq 3$. Next, we prove that a Hopf real hypersurface has Reeb parallel normal Jacobi operator if and only if it has an $mathfrak A$-isotropic singular normal vector field.

We construct semiglobal singular spacetimes for the Einstein equations coupled to a massless scalar field. Consistent with the heuristic analysis of Belinskii, Khalatnikov, Lifshitz or BKL for this system, there are no oscillations due to the scalar field. (This is much simpler than the oscillatory BKL heuristics for the Einstein vacuum equations.) Prior results are due to Andersson and Rendall in the real analytic case, and Rodnianski and Speck in the smooth near-spatially-flat-FLRW case. Similar to Andersson and Rendall we give asymptotic data at the singularity, which we refer to as final data, but our construction is not limited to real analytic solutions. This paper is a test application of tools (a graded Lie algebra formulation of the Einstein equations and a filtration) intended for the more subtle vacuum case. We use homological algebra tools to construct a formal series solution, then symmetric hyperbolic energy estimates to construct a true solution well-approximated by truncations of the formal one. We conjecture that the image of the map from final data to initial data is an open set of anisotropic initial data.

The characterization of phase dynamics in coupled oscillators offers insights into fundamental phenomena in complex systems. To describe the collective dynamics in the oscillatory system, order parameters are often used but are insufficient for identifying more specific behaviors. We therefore propose a topological approach that constructs quantitative features describing the phase evolution of oscillators. Here, the phase data are mapped into a high-dimensional space at each time point, and topological features describing the shape of the data are subsequently extracted from the mapped points. We extend these features to time-variant topological features by considering the evolution time, which serves as an additional dimension in the topological-feature space. The resulting time-variant features provide crucial insights into the time evolution of phase dynamics. We combine these features with the machine learning kernel method to characterize the multicluster synchronized dynamics at a very early stage of the evolution. Furthermore, we demonstrate the usefulness of our method for qualitatively explaining chimera states, which are states of stably coexisting coherent and incoherent groups in systems of identical phase oscillators. The experimental results show that our method is generally better than those using order parameters, especially if only data on the early-stage dynamics are available.

Let $G=(V,E)$ be a finite graph and $M_G$ be the centered Hardy-Littlewood maximal operator defined there. We found the optimal value $C_{G,p}$ such that the inequality $$Var_{p}(M_{G}f)le C_{G,p}Var_{p}(f)$$ holds for every every $f:V o mathbb{R},$ where $Var_p$ stands for the $p$-variation, when: (i)$G=K_n$ (complete graph) and $pin [frac{ln(4)}{ln(6)},infty)$ or $G=K_4$ and $pin (0,infty)$;(ii) $G=S_n$(star graph) and $1ge pge frac{1}{2}$; $pin (0,frac{1}{2})$ and $nge C(p)<infty$ or $G=S_3$ and $pin (1,infty).$ We also found the optimal value $L_{G,2}$ such that the inequality $$|M_{G}f|_2le L_{G,2}|f|_2$$ holds for every $f:V o mathbb{R}$, when: (i)$G=K_n$ and $nge 3$;(ii)$G=S_n$ and $nge 3.$

For $n$-vertex graphs with treewidth $k = O(n^{1/2-epsilon})$ and an arbitrary $epsilon>0$, we present a word-RAM algorithm to compute vertex separators using only $O(n)$ bits of working memory. As an application of our algorithm, we give an $O(1)$-approximation algorithm for tree decomposition. Our algorithm computes a tree decomposition in $c^k n (log log n) log^* n$ time using $O(n)$ bits for some constant $c > 0$.

We finally use the tree decomposition obtained by our algorithm to solve Vertex Cover, Independent Set, Dominating Set, MaxCut and $3$-Coloring by using $O(n)$ bits as long as the treewidth of the graph is smaller than $c' log n$ for some problem dependent constant $0 < c' < 1$.

We design and implement the first private and anonymous decentralized crowdsourcing system ZebraLancer, and overcome two fundamental challenges of decentralizing crowdsourcing, i.e., data leakage and identity breach.

First, our outsource-then-prove methodology resolves the tension between the blockchain transparency and the data confidentiality to guarantee the basic utilities/fairness requirements of data crowdsourcing, thus ensuring: (i) a requester will not pay more than what data deserve, according to a policy announced when her task is published via the blockchain; (ii) each worker indeed gets a payment based on the policy, if he submits data to the blockchain; (iii) the above properties are realized not only without a central arbiter, but also without leaking the data to the open blockchain. Second, the transparency of blockchain allows one to infer private information about workers and requesters through their participation history. Simply enabling anonymity is seemingly attempting but will allow malicious workers to submit multiple times to reap rewards. ZebraLancer also overcomes this problem by allowing anonymous requests/submissions without sacrificing accountability. The idea behind is a subtle linkability: if a worker submits twice to a task, anyone can link the submissions, or else he stays anonymous and unlinkable across tasks. To realize this delicate linkability, we put forward a novel cryptographic concept, i.e., the common-prefix-linkable anonymous authentication. We remark the new anonymous authentication scheme might be of independent interest. Finally, we implement our protocol for a common image annotation task and deploy it in a test net of Ethereum. The experiment results show the applicability of our protocol atop the existing real-world blockchain.

We present a novel numerical scheme to approximate the solution map $smapsto u(s) := mathcal{L}^{-s}f$ to partial differential equations involving fractional elliptic operators. Reinterpreting $mathcal{L}^{-s}$ as interpolation operator allows us to derive an integral representation of $u(s)$ which includes solutions to parametrized reaction-diffusion problems. We propose a reduced basis strategy on top of a finite element method to approximate its integrand. Unlike prior works, we deduce the choice of snapshots for the reduced basis procedure analytically. Avoiding further discretization, the integral is interpreted in a spectral setting to evaluate the surrogate directly. Its computation boils down to a matrix approximation $L$ of the operator whose inverse is projected to a low-dimensional space, where explicit diagonalization is feasible. The universal character of the underlying $s$-independent reduced space allows the approximation of $(u(s))_{sin(0,1)}$ in its entirety. We prove exponential convergence rates and confirm the analysis with a variety of numerical examples.

Further improvements are proposed in the second part of this investigation to avoid inversion of $L$. Instead, we directly project the matrix to the reduced space, where its negative fractional power is evaluated. A numerical comparison with the predecessor highlights its competitive performance.

Moving a module in a modular robot is a very complex and error-prone process. Unlike in swarm, in the modular robots we are targeting, the moving module must keep the connection to, at least, one other module. In order to miniaturize each module to few millimeters, we have proposed a design which is using electrostatic actuator. However, this movement is composed of several attachment, detachment creating the movement and each small step can fail causing a module to break the connection. The idea developed in this paper consists in creating a new kind of deformable module allowing a movement which keeps the connection between the moving and the fixed modules. We detail the geometry and the practical constraints during the conception of this new module. We then validate the possibility of movement for a module in an existing configuration. This implies the cooperation of some of the modules placed along the path and we show in simulation that it exists a motion process to reach every free positions of the surface for a given configuration.

We study the problem of jointly designing a sparse sensor and actuator schedule for linear dynamical systems while guaranteeing a control/estimation performance that approximates the fully sensed/actuated setting. We further prove a separation principle, showing that the problem can be decomposed into finding sensor and actuator schedules separately. However, it is shown that this problem cannot be efficiently solved or approximated in polynomial, or even quasi-polynomial time for time-invariant sensor/actuator schedules; instead, we develop deterministic polynomial-time algorithms for a time-varying sensor/actuator schedule with guaranteed approximation bounds. Our main result is to provide a polynomial-time joint actuator and sensor schedule that on average selects only a constant number of sensors and actuators at each time step, irrespective of the dimension of the system. The key idea is to sparsify the controllability and observability Gramians while providing approximation guarantees for Hankel singular values. This idea is inspired by recent results in theoretical computer science literature on sparsification.

This paper illustrates five different techniques to assess the distinctiveness of topics, key terms and features, speed of information dissemination, and network behaviors for Covid19 tweets. First, we use pattern matching and second, topic modeling through Latent Dirichlet Allocation (LDA) to generate twenty different topics that discuss case spread, healthcare workers, and personal protective equipment (PPE). One topic specific to U.S. cases would start to uptick immediately after live White House Coronavirus Task Force briefings, implying that many Twitter users are paying attention to government announcements. We contribute machine learning methods not previously reported in the Covid19 Twitter literature. This includes our third method, Uniform Manifold Approximation and Projection (UMAP), that identifies unique clustering-behavior of distinct topics to improve our understanding of important themes in the corpus and help assess the quality of generated topics. Fourth, we calculated retweeting times to understand how fast information about Covid19 propagates on Twitter. Our analysis indicates that the median retweeting time of Covid19 for a sample corpus in March 2020 was 2.87 hours, approximately 50 minutes faster than repostings from Chinese social media about H7N9 in March 2013. Lastly, we sought to understand retweet cascades, by visualizing the connections of users over time from fast to slow retweeting. As the time to retweet increases, the density of connections also increase where in our sample, we found distinct users dominating the attention of Covid19 retweeters. One of the simplest highlights of this analysis is that early-stage descriptive methods like regular expressions can successfully identify high-level themes which were consistently verified as important through every subsequent analysis.

See the Code - See it Full Page - See Details

This Pen uses: HTML, CSS, JavaScript, and

UPDATE: The Department of Veterans Affairs announced after this article was first published that Spokane Veterans Home residents with COVID-19 would be moved to the Mann-Grandstaff VA Medical Center.…

A library of macrocyclic compounds of the formula (I) where part (A) is a bivalent radical, a —(CH2)y— bivalent radical or a covalent bond;where part (B) is a bivalent radical, a —(CH2)z— bivalent radical, or a covalent bond;where part (C) is a bivalent radical, a —(CH2)t— bivalent radical, or a covalent bond; andwhere part (T) is a —Y-L-Z— radical wherein Y is CH2 or CO, Z is NH or O and L is a bivalent radical. These compounds are useful for carrying out screening assays or as intermediates for the synthesis of other compounds of pharmaceutical interest. A process for the preparation of these compounds in a combinatorial manner, is also disclosed.

Embodiments are described for a system and method of providing a data miner that decouples the analytic flow solution components from the data source. An analytic-flow solution then couples with the target data source through a simple set of data source connector, table and transformation objects, to perform the requisite analytic flow function. As a result, the analytic-flow solution needs to be designed only once and can be re-used across multiple target data sources. The analytic flow can be modified and updated at one place and then deployed for use on various different target data sources.