Back before our sense of normalcy was completely reset, 330,000 people used to pass through Times Square in New York…

Why asking Help from Allah is the ‘First Thing First’? As everything is in this universe has made by Allah, Almighty. He is the only One who has power over all. So, we should always ask help from the Almighty first to keep us away from these...

The post Coronavirus Alert! Precautionary Measures & Real-time Apps To Keep An Eye On Covid-19 Outbreak Situation appeared first on SmashingApps.com.

As bloggers, we spend a lot of time working on a range of different tasks. This includes things like checking stats, monitoring ad revenue, and interacting on social media. That leaves us with a lot of sites to log into. But by adding a few WordPress plugins, you can pull some of this data back into the WordPress dashboard, which saves you time by giving a quick snapshot overview of everything.

CEDAR RAPIDS — The United States Hockey League conducts its annual drafts Monday and Tuesday. It’s a 3 p.m. start for Monday’s Phase I draft of players with a 2004 birth date....

CEDAR RAPIDS — Yes, Mark Carlson is good friends with his father. But make zero mistake here. Cade Littler is a hockey player. That’s the biggest thing and why the Cedar Rapids...

During COVID-19, you might be tempted to stay silent. But your customers need to hear from you! Learn how to craft the right message with the right tone.

The post Why Customer Communication is Crucial in Times of Uncertainty appeared first on WooCommerce.

At the turn of the 20th century, a vaccine had been developed for smallpox, a virus that killed millions in the 1800s. Those who survived the disease were often left badly scarred or blind. The...

“It is hopelessness even more than pain that crushes the soul.”

-William Styron.

In my 35 years on earth I’ve heard the term “unprecedented” used only a handful of times to describe global events. I don’t know about you, but as I write this tucked away in my basement where I’ve been working from for the last two months, I’m pretty darn sick of the word “unprecedented.”

All of us are now experiencing the culmination of a global pandemic, a painful economic reality and the challenge of stay at home orders.

Social connectedness is one of the most important aspects of the human condition. During times of crisis we come together, not apart. Time spent with friends and family is immensely important to our well-being, heck, even time spent with co-workers has its benefits. Physical proximity to our supports matters, it matters a lot.

For those of us with a history of mental health struggles (and without), this “unprecedented” crisis has presented unique challenges to our well-being: uncertainty, fear, and a sense of hopelessness. The daily loss of life, the 24-hour news cycle with its constant focus on the pandemic, and a massive economic crisis. Good news is hard to come by.

The psychologist and suicidologist Edwin Schneidman coined the term “psychological pain” to describe “how much you hurt as a human. It is mental suffering; mental torment.”

All of us hurt right now.

During times of stress, it is not uncommon to experience thoughts of suicide.

The vast majority of individuals who experience suicidal thoughts or behaviors go on to live healthy and full lives. During this time where many of us have already felt financial impacts or experienced increased depression, the possibility of experiencing suicidal ideation or behavior increases.

Support is available, help is out there.

1. Call the National Suicide Prevention Lifeline (1-800-273-8255) to immediately speak with a counselor (24/7/365). If you are thinking about suicide, are worried about someone else, or would like emotional support, the Lifeline network is available.

2. Mobile Crisis Outreach: If you live in Eastern Iowa you can call the Iowa Helpline (855-581-8111) to receive free telehealth services from a mobile crisis counselor. Counselors will connect with you via telehealth to provide screening, immediate intervention and guidance.

There are several warning signs that can help you determine if you or a loved one is at risk for suicide. These include:

• Talking about wanting to die or to kill themselves

• Looking for a way to kill themselves, like purchasing a firearm

• Talking about feeling hopeless or having no reason to live

• Talking about feeling trapped or in unbearable pain

• Talking about being a burden to others

3. Social distancing does not mean social isolation. While we can’t be physically with many of our friends and family, we should still make an effort to connect with them. If there is someone you’ve worried about in the past, a friend or family member with a history of depression, now is an important time to reach out and see how they are doing.

4. Take care of what you can. I’ve noticed with many of the clients I work with (and myself) that as social distancing and stay at home orders have been in place for nearly two months now, sleep habits and routines have started to change. I find myself staying up later and sleeping in later. Sleep and mental health go hand in hand. It’s hard to feel good when we are not sleeping, or if our sleep cycles are significantly disrupted. Depression can drive us to want to sleep away the days. This is something to be avoided and tends to compound our feelings of loneliness.

5. Connect with your mental health providers. Connecting with a mental health provider remains an important component of support. Let your provider know that you’ve had thoughts of suicide so you can work collaboratively on treatment and support.

6. Know that you matter. Individuals who experience thoughts of suicide and/or depression will often report that they feel or think their lives don’t matter. As Kevin Hines, the motivational speaker and suicide prevention advocate says “You matter to people you haven’t even met yet.” Treatment for suicide ideation and behavior is very effective. You are worth it. The vast majority of people who experience suicide ideation go on to live healthy and fulfilling lives.

“Look well into thyself; there is a source of strength which will always spring up if thou wilt always look.”

-Marcus Aurelius, The Meditations.

Drew Martel (LISW, CADC) is the director of crisis services at Foundation 2 and has been involved in several suicide risk assessments, as well as provided trainings across the state on suicide intervention and treatment. Drew also provides individual therapy at Meadowlark Psychiatric Services and is an adjunct instructor at the University of Iowa School of Social Work.

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.

Sprucing up your website to enhance the look and feel is a great idea, but is it necessary? Explore these signs that it's time for website redesign. More

If you own an AirPort base station, you can use the Timed Access feature to control the days and times when users access the Internet. This could come in handy in a variety of situations. For example, if you own a cafe and provide free wi-fi access, you can configure the AirPort to block all access to the Internet when your business is closed. And if you have children, you can set time limits for specific devices in your home.

There are two ways to use the timed access feature. You can create a default allow policy to allow all devices to access the Internet at any time, and then specify custom schedules for specific devices. Or you can create a default deny policy to prevent all devices from accessing the Internet according the schedule you specify, and then exempt specific devices by creating custom schedules.

Here's how to control AirPort network access with time limits:

1. Open the AirPort Utility application. (It's in Applications → Utilities.) The window shown below appears.
   
   
2. Click the AirPort Extreme's icon. The status pop-up window appears.
   
   
3. Click Edit. The settings window appears.
   
   
4. Select the Network tab. The window shown below appears.
   
   
5. Select the Enable Access Control checkbox.
   
   
6. Click Timed Access Control. The window shown below appears.
   
   
7. Select the Unlimited (default) option. By default, this allows all of the devices connected to your AirPort to access the Internet all day, every day, but you can change this to block Internet access for all devices (except the ones you specify later) during the times you set.
   
   
8. If you'd like to limit the days and times that a specific device can access the Internet, click the + button under the Wireless Clients field. The window shown below appears.
   
   
9. Enter a name for the device in the Description field.
   
   
10. Enter the device's MAC address in the MAC Address field. You can use the following tutorials to find the device's MAC address.
    
    • How to Find Your Mac's MAC Address
    • How to Find Your iPad's MAC Address
    • How to Find Your iPhone's MAC Address
    
    
11. Use the + button under the Wireless Access Times field to create a schedule for this device's Internet access.
    
    
12. Once you've added all of your devices and customized the schedules, click Save.
    
    
13. Click Update. The AirPort will restart to apply the changes.

Congratulations! You have successfully set time limits for the devices connecting to your AirPort network. The schedule you created is effective immediately.

Meet Your Macinstructor

Matt Cone, the author of Master Your Mac, has been a Mac user for over 20 years. A former ghost writer for some of Apple's most notable instructors, Cone founded Macinstruct in 1999, a site with OS X tutorials that boasts hundreds of thousands of unique visitors per month. You can email him at: matt@macinstruct.com.

At the turn of the 20th century, a vaccine had been developed for smallpox, a virus that killed millions in the 1800s. Those who survived the disease were often left badly scarred or blind.

The vaccine’s protection, though, lasted only five years and had to be renewed. And people forgot to do that, leading to occasional epidemics, including a serious outbreak on the Meskwaki Settlement near Tama.

In February 1901, three dozen Iowa communities reported smallpox outbreaks. When Des Moines reported 200 smallpox cases in late February, the mayor closed the schools and prohibited public gatherings. Still, no one died. That would not be the case at the Meskwaki Settlement.

On Oct. 22, 1901, an area resident told Dr. Benjamin Thompson of Tama, “I believe the Indians have the smallpox.”

Thompson went to the nearby Meskwaki Settlement, home to 309 people, to investigate.

He learned that an Indian from the Winnebago tribe had visited the settlement Sept. 23. He had become ill, but no doctor was called and he continued meeting with tribe members.

Two weeks later, the Meskwaki were becoming ill.

Thompson went back to the settlement with Dr. George Carpenter of Toledo. The first wickiup they visited had four active smallpox cases and three people recovering from the virus. Two Meskwaki who’d lived there had died.

The doctors found another five cases and were told of two other deaths.

The doctors that night reported to a joint meeting of the boards of health in Tama, Toledo and Montour.

William Malin, the Interior Department’s Indian agent for the settlement, insisted there was no problem. But after another medical visit to the settlement, the three cities quarantined themselves.

By Nov. 2, 70 Meskwaki had smallpox, and nine members of the tribe had died. Two weeks later, the totals had risen to 90 Meskwaki with smallpox and 35 deaths.

To complicate matters, the Meskwaki declined offers to go to the hospital, they refused smallpox vaccinations and they refused to stay on the settlement. If they became sick, they would hide from the doctors.

The Tama Herald reported, “It looks as though the disease must run its course through the tribe, carrying off the aged and the infirm and weakening the constitution of those who may survive.”

The Iowa governor appealed to Interior Secretary Ethan Hitchcock for authority to enforce the quarantine among the Meskwaki. Hitchcock complied, giving the state the authority to “take any necessary action.”

National Guard hospital tents and cots were shipped to the settlement. The Meskwaki were vaccinated, and they acquiesced to the quarantine.

The local towns began raising money for medicines and provisions not covered by the federal government.

Meanwhile, Congress appropriated $50,000 — more than $1 million in today’s dollars — to eradicate smallpox on the settlement. The bill gave the Interior Department the authority to quarantine the village and, if necessary, burn Meskwaki wickiups and clothing to halt the contagion.

The state of Iowa chipped in another $7,000 to burn the clothing, blankets, wickiups and other property belonging to the Tama tribe and to provide replacements for the Meskwaki.

The money paid for disinfectants — formaldehyde gas and corrosive sublimate fluid — to bathe tribal members and their dogs. Members of the tribe were forced to move to a camping ground while their village was decontaminated.

Malin, the Indian agent, reported to the Interior Department it took seven days to clean and renovate “the Indian camp.”

“During this process, a large number of the wickiups, where the disease had been prevalent, also large quantities of clothing, bedding and other infected property, were committed to the flames and new goods of similar character supplied,” he reported.

“Twenty-four new board houses, built of good lumber, and some 2,700 square yards of very heavy duck for tents, to those who preferred tents to houses, were given in lien of the wickiups destroyed. ... The Indians emerged from the trying ordeal through which they had passed and came out into the world again, after having been confined to the limited area of their camping grounds ... with a higher and better conception of the white man’s civilization.”

That assessment aside, the Meskwaki Settlement survived and grew. It now covers 8,000 acres and is home to 800 of the tribe’s 1,300 members.

It wasn’t until 1980 that smallpox was declared eradicated worldwide.

l Comments: d.fannonlangton@gmail.com

I’ve shot at this location a few times but for some reason I’ve never seen it from the other side. Literal proof that shooting with other creatives gives you new perspective. ???? (at Toronto, Ontario)

This is from my favourite shoot/photoset of all time. It was spontaneous, serendipitous, and simply beautiful. ☂️
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The edit: After applying my preset (I used Clean for this one), I bumped up the exposure and desaturated the yellows/oranges a bit. As a finishing touch, I used a graduated filter to brighten the top a bit and a radial filter on @sllychn to brighten and sharpen the focal point. That’s it! ✨ (at Toronto, Ontario)

Merry Xmas everyone! It’s giveaway time! ????????
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Thank you to all those who participated in my preset giveaway this week! The support makes all the hard work and extra effort worth it!
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Without further ado, the randomly drawn winners of my custom Lightroom presets are @l9lee @rchellau @bokeh.jay! Congrats and check your DMs soon for details! ????
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You still have until tomorrow to grab my presets (which this shot was edited with) for 50% off! They’ll be going back to regular price after so don’t miss out! ???? (at Toronto, Ontario)

Quick survey: on average, what time is it when you check Instagram for the first time on any given day? (Be sure to include your timezone!)
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PS: Thank you for all the incredible support on yesterday’s announcement. ❤️ (at Toronto, Ontario)

If you’re a professional wanting to showcase your products, what better way is there to do so than with a personal portfolio? Maybe one that’s presented in a way that invites close study? A portfolio used to be a folder of papers you would carry around with you when visiting one potential customer after another. […]

The post Save time by using these builders for portfolio websites and pages appeared first on WebAppers.

Many people have regular jobs that they love, and which enable them to use their creative skills to make money. This could be anything from coding video games to being an expert in SEO or designing...

Have you chosen Mac for its reliable system? They really have a lot of advantages and are of the best quality. Mac users don’t face serious problems with hard drives often. But the reality is such...

Tags: coronavirus, New York Times, Stuart A. Thompson, vaccine

With the debut of Vert.x, the asynchronous framework is reaching an inflection point, suggests Andrew Cholakian. With Vert.x, the software is packaged together in such a way as to be extremely practical, he states. For some JVM zealots, Vert.x may meet needs recently and apparently addressed by node.js. Vert.x is an asynchronous application server – Read the rest...

The team at StarTrek.com has released an official infographic video A Timeline Through the Star Trek Universe, Part 1 that includes all of the various TV and Movie series in their inter-connected places on the timeline.

WATCH: A Timeline Through the Star Trek Universe, Part I

The Star Trek saga has boldly traveled through space and time throughout its over fifty year history. Starfleet has visited the distant past, the far future, and even some alternate timelines. Need some context before you dive deep into Star Trek: Discovery and prepare for Star Trek: Picard? We've got you covered in Part One of our video timeline.

Here’s a snapshot of the complete timeline:

Interesting that they call this “Part 1”… Implying that there is much more to come.

From a DataViz design perspective, I’m not a fan of timelines that don’t keep a consistent scale. There’s a huge jump from the Big Bang 13.8 Billion years ago to the year 1900, then the scale is pretty even with 50-year jumps until the year 2150, and then the scale changes again, making the 50-year jumps are much farther apart.

It appears that this is an evolution of an original design project collaboration between Rachel Ivanoff and Jordan Twaddle that was on exhibit at the The Museum of Pop-Culture (MoPOP) in Seattle, Washington in 2016. The new video adds Star Trek: Discovery to the timeline, and video snippets from each of the shows.

Back in 2016, they shared this great animated GIF of the design evolution from the original timeline design process:

I hope they were involved in the development of the new timeline video as well.

By Harriet Gross Courtesy of Aeon What’s not to like about gardening? It’s a great way to get outdoors, away from everyday routines, and to exercise your creativity. It’s good for your health, whatever your age, and gardeners tend to be … Continue reading →

In early 2014 I had just gotten married and recently moved into a new home. With two major life events out of the way, I decided I was ready to lead a WordCamp. I originally planned to organize WordCamp Detroit. I was an organizer twice before and the event had missed a year and I […]

The post 5 Critical Lessons Learned Organizing WordCamp Ann Arbor for the Third Time appeared first on Psychology of Web Design | 3.7 Blog.

To prevent spammers from flooding old articles with useless comments you can set WordPress to close comments after a certain […]

By Harriet Gross Courtesy of Aeon What’s not to like about gardening? It’s a great way to get outdoors, away from everyday routines, and to exercise your creativity. It’s good for your health, whatever your age, and gardeners tend to be … Continue reading →

A cellist since the age of eight, Zoë Keating pursued electronic music and contemporary composition as part of her Liberal Arts studies at Sarah Lawrence College in New York. I came across her music almost 10 years ago and love it so much I reached out to see if she would be interested on being on the show. Not only did she respond, she left us reeling from her incredible live performance and chat on art + entrepreneurship. Now she’s back on tour with her latest album Snowmelt. In this episode, we go deep into personal growth, dealing with incredible loss, balancing parenthood and career, and landscape for independent artists. Enjoy! FOLLOW ZOË: instagram | twitter | website Listen to the Podcast Subscribe   Watch the Episode  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 Independence and the Art of Timeless Work with Zoë Keating appeared first on Chase Jarvis Photography.

DJI has announced their new Matrice 300 RTK “flying platform” (big drone) and the Zenmuse H20 hybrid camera series, to provide “a safer and smarter solution” to their enterprise customers. The M300 RTK, DJI says, is their first to integrate modern aviation features, advanced AI, 6-direction sensing and positioning, a UAV health management system and […]

The post DJI’s new Matrice 300 RTK drone offers a ridiculous 55-minutes of flight time and 2.7kg payload appeared first on DIY Photography.

We have a new preview on https://www.007soccerpicks.com/sunday-matches/half-time-picks-sunday-17-september-2017/

Half Time Picks *** Sunday *** 17 September 2017

HALF TIME PICKS To return: ??? USD Odds: 7.43 Stake: 100 USD   Starting in   Teams   Half Time Our Pick Odds Alaves - Villarreal Soccer: Spain - LaLiga HALF TIME X 2.01 Zenit Petersburg - Ufa Soccer: Russia -…

We have a new preview on https://www.007soccerpicks.com/sunday-matches/fulltime-result-picks-sunday-17-september-2017/

Fulltime Result Picks *** Sunday *** 17 September 2017

FULLTIME PICKS To return: ??? USD Odds: 3.88 Stake: 100 USD   Starting in   Teams   Our Prediction Odds Waregem - Mouscron Soccer: Belgium - Jupiler League 1 1.61 Sassuolo - Juventus Soccer: Italy - Serie…

We have a new preview on https://www.007soccerpicks.com/monday-matches/fulltime-result-picks-monday-18-september-2017/

Fulltime Result Picks *** Monday *** 18 September 2017

FULLTIME PICKS To return: ??? USD Odds: 3.77 Stake: 100 USD   Starting in   Teams   Our Prediction Odds Plzen - Zlin Soccer: Czech Republic - 1. Liga 1 1.39 Odd - Aalesund Soccer: Norway -…

We have a new preview on https://www.007soccerpicks.com/monday-matches/half-time-picks-monday-18-september-2017/

Half Time Picks *** Monday *** 18 September 2017

HALF TIME PICKS To return: ??? USD Odds: 8.39 Stake: 100 USD   Starting in   Teams   Half Time Our Pick Odds Espanyol - Celta Vigo Soccer: Spain - LaLiga HALF TIME X 2.07 Lokomotiv Moscow - Amkar Soccer: Russia…

We have a new preview on https://www.007soccerpicks.com/tuesday-matches/half-time-picks-tuesday-19-september-2017/

Half Time Picks *** Tuesday *** 19 September 2017

HALF TIME PICKS To return: ??? USD Odds: 6.93 Stake: 100 USD   Starting in   Teams   Half Time Our Pick Odds Crystal Palace - Huddersfield Soccer: England - Carabao Cup HALF TIME X 2.10 FC Augsburg - RB…

We have a new preview on https://www.007soccerpicks.com/tuesday-matches/fulltime-result-picks-tuesday-19-september-2017/

Fulltime Result Picks *** Tuesday *** 19 September 2017

FULLTIME PICKS To return: ??? USD Odds: 5.40 Stake: 100 USD   Starting in   Teams   Our Prediction Odds GAIS - Frej Soccer: Sweden - Superettan 1 1.82 Bologna - Inter Soccer: Italy - Serie…

Consider that $u_0$ nodes are aware of some piece of data $d_0$. This note derives the expected time required for the data $d_0$ to be disseminated through-out a network of $n$ nodes, when communication between nodes evolves according to a graphical Markov model $overline{ mathcal{G}}_{n,hat{p}}$ with probability parameter $hat{p}$. In this model, an edge between two nodes exists at discrete time $k in mathbb{N}^+$ with probability $hat{p}$ if this edge existed at $k-1$, and with probability $(1-hat{p})$ if this edge did not exist at $k-1$. Each edge is interpreted as a bidirectional communication link over which data between neighbors is shared. The initial communication graph is assumed to be an Erdos-Renyi random graph with parameters $(n,hat{p})$, hence we consider a emph{stationary} Markov model $overline{mathcal{G}}_{n,hat{p}}$. The asymptotic "$u_0$-expected flooding time" of $overline{mathcal{G}}_{n,hat{p}}$ is defined as the expected number of iterations required to transmit the data $d_0$ from $u_0$ nodes to $n$ nodes, in the limit as $n$ approaches infinity. Although most previous results on the asymptotic flooding time in graphical Markov models are either emph{almost sure} or emph{with high probability}, the bounds obtained here are emph{in expectation}. However, our bounds are tighter and can be more complete than previous results.

We derive the non-relativistic $c oinfty$ and ultra-relativistic $c o 0$ limits of the $kappa$-deformed symmetries and corresponding spacetime in (3+1) dimensions, with and without a cosmological constant. We apply the theory of Lie bialgebra contractions to the Poisson version of the $kappa$-(A)dS quantum algebra, and quantize the resulting contracted Poisson-Hopf algebras, thus giving rise to the $kappa$-deformation of the Newtonian (Newton-Hooke and Galilei) and Carrollian (Para-Poincar'e, Para-Euclidean and Carroll) quantum symmetries, including their deformed quadratic Casimir operators. The corresponding $kappa$-Newtonian and $kappa$-Carrollian noncommutative spacetimes are also obtained as the non-relativistic and ultra-relativistic limits of the $kappa$-(A)dS noncommutative spacetime. These constructions allow us to analyze the non-trivial interplay between the quantum deformation parameter $kappa$, the curvature parameter $eta$ and the speed of light parameter $c$.

This paper is devoted to the study of the singularity phenomenon of timelike extremal hypersurfaces in Minkowski spacetime $mathbb{R}^{1+3}$. We find that there are two explicit lightlike self-similar solutions to a graph representation of timelike extremal hypersurfaces in Minkowski spacetime $mathbb{R}^{1+3}$, the geometry of them are two spheres. The linear mode unstable of those lightlike self-similar solutions for the radially symmetric membranes equation is given. After that, we show those self-similar solutions of the radially symmetric membranes equation are nonlinearly stable inside a strictly proper subset of the backward lightcone. This means that the dynamical behavior of those two spheres is as attractors. Meanwhile, we overcome the double roots case (the theorem of Poincar'{e} can't be used) in solving the difference equation by construction of a Newton's polygon when we carry out the analysis of spectrum for the linear operator.

We address the problem of optimal path planning for a simple nonholonomic vehicle in the presence of obstacles. Most current approaches are either split hierarchically into global path planning and local collision avoidance, or neglect some of the ambient geometry by assuming the car is a point mass. We present a Hamilton-Jacobi formulation of the problem that resolves time-optimal paths and considers the geometry of the vehicle.

In this paper we study removable singularities for regular $(1,1/2)$-Lipschitz solutions of the heat equation in time varying domains. We introduce an associated Lipschitz caloric capacity and we study its metric and geometric properties and the connection with the $L^2$ boundedness of the singular integral whose kernel is given by the gradient of the fundamental solution of the heat equation.

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.

Device fingerprints like sensor pattern noise (SPN) are widely used for provenance analysis and image authentication. Over the past few years, the rapid advancement in digital photography has greatly reshaped the pipeline of image capturing process on consumer-level mobile devices. The flexibility of camera parameter settings and the emergence of multi-frame photography algorithms, especially high dynamic range (HDR) imaging, bring new challenges to device fingerprinting. The subsequent study on these topics requires a new purposefully built image dataset. In this paper, we present the Warwick Image Forensics Dataset, an image dataset of more than 58,600 images captured using 14 digital cameras with various exposure settings. Special attention to the exposure settings allows the images to be adopted by different multi-frame computational photography algorithms and for subsequent device fingerprinting. The dataset is released as an open-source, free for use for the digital forensic community.

Uncertain dynamic obstacles, such as pedestrians or vehicles, pose a major challenge for optimal robot navigation with safety guarantees. Previous work on motion planning has followed two main strategies to provide a safe bound on an obstacle's space: a polyhedron, such as a cuboid, or a nonlinear differentiable surface, such as an ellipsoid. The former approach relies on disjunctive programming, which has a relatively high computational cost that grows exponentially with the number of obstacles. The latter approach needs to be linearized locally to find a tractable evaluation of the chance constraints, which dramatically reduces the remaining free space and leads to over-conservative trajectories or even unfeasibility. In this work, we present a hybrid approach that eludes the pitfalls of both strategies while maintaining the original safety guarantees. The key idea consists in obtaining a safe differentiable approximation for the disjunctive chance constraints bounding the obstacles. The resulting nonlinear optimization problem is free of chance constraint linearization and disjunctive programming, and therefore, it can be efficiently solved to meet fast real-time requirements with multiple obstacles. We validate our approach through mathematical proof, simulation and real experiments with an aerial robot using nonlinear model predictive control to avoid pedestrians.

This work deals with the efficient numerical solution of the time-fractional heat equation discretized on non-uniform temporal meshes. Non-uniform grids are essential to capture the singularities of "typical" solutions of time-fractional problems. We propose an efficient space-time multigrid method based on the waveform relaxation technique, which accounts for the nonlocal character of the fractional differential operator. To maintain an optimal complexity, which can be obtained for the case of uniform grids, we approximate the coefficient matrix corresponding to the temporal discretization by its hierarchical matrix (${cal H}$-matrix) representation. In particular, the proposed method has a computational cost of ${cal O}(k N M log(M))$, where $M$ is the number of time steps, $N$ is the number of spatial grid points, and $k$ is a parameter which controls the accuracy of the ${cal H}$-matrix approximation. The efficiency and the good convergence of the algorithm, which can be theoretically justified by a semi-algebraic mode analysis, are demonstrated through numerical experiments in both one- and two-dimensional spaces.

Cyber-physical systems for robotic surgery have enabled minimally invasive procedures with increased precision and shorter hospitalization. However, with increasing complexity and connectivity of software and major involvement of human operators in the supervision of surgical robots, there remain significant challenges in ensuring patient safety. This paper presents a safety monitoring system that, given the knowledge of the surgical task being performed by the surgeon, can detect safety-critical events in real-time. Our approach integrates a surgical gesture classifier that infers the operational context from the time-series kinematics data of the robot with a library of erroneous gesture classifiers that given a surgical gesture can detect unsafe events. Our experiments using data from two surgical platforms show that the proposed system can detect unsafe events caused by accidental or malicious faults within an average reaction time window of 1,693 milliseconds and F1 score of 0.88 and human errors within an average reaction time window of 57 milliseconds and F1 score of 0.76.