DoorDash exits 4 markets, including Japan, to focus on growth elsewhere

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By DEE-ANN DURBIN, AP Business Writer

DoorDash said Wednesday that it’s ending operations in Qatar, Singapore, Japan and Uzbekistan.

The San Francisco-based delivery company said the decision comes after a monthslong review of country-specific conditions. DoorDash said it wants to focus its investments on places were it can build sustainable scale and long-term market leadership.

“Our priority is supporting our teams and partners through an orderly transition as we focus on the geographies where we can offer the best products and build for long-term success,” said Miki Kuusi, the head of DoorDash’s international division, in a statement.

DoorDash was a latecomer to some of the affected markets. The company began operations in Japan in 2021, five years after its rival Uber Eats. Deliveroo, a U.K. delivery company that was acquired by DoorDash last year, has only been operating in Qatar since 2022. That’s almost a decade after Dubai-based Talabat began making deliveries in Qatar.

DoorDash also faces stiff competition from entrenched rivals like GrabFood and Foodpanda in Singapore and Russia-based Yandex Eats in Uzbekistan.

DoorDash said it doesn’t expect the actions to impact its financial guidance. The company’s shares rose 5% in midday trading.

DoorDash is the dominant delivery provider in the U.S., but it has been playing catch-up to Uber Eats internationally. In addition to its purchase of Deliveroo, DoorDash acquired Finnish delivery service Wolt in 2021 to help it expand into Europe.

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The surprising complexity behind the squeak of basketball shoes on hardwood floors

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By ADITHI RAMAKRISHNAN

NEW YORK (AP) — As he watched the Boston Celtics play from the stands of TD Garden, one noise kept catching Adel Djellouli’s ear.

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“This squeaking sound when players are sliding on the floor is omnipresent,” he said. “It’s always there, right?”

Squeaky shoes are part of the symphony of a basketball game, when rubber soles rasp against the hardwood floors as players jab step, cut and pivot and defenders move their feet to stay in front of their assignment.

Returning home from the game, Djellouli wondered how that sound was produced. And as a materials scientist at Harvard University, he had a way to find out.

Djellouli and colleagues slid a sneaker against a smooth glass plate over and over. They recorded the squeaks with a microphone and filmed the whole thing with a high speed camera to see what was happening under the shoe.

In a study published Wednesday in the journal Nature, they described what they found. As the shoe works hard to keep its grip, tiny sections of the sole change shape as they momentarily lose then regain contact with the floor thousands of times per second — at a frequency that matches the pitch of the loud squeak we hear.

“That squeaking is basically your shoe rippling, or creating wrinkles that travel super fast. They repeat at a high frequency, and this is why you get that squeaky noise,” Djellouli said.

The grip patterns on the soles may also play a role. When researchers slid blocks of flat, featureless rubber against the glass, they saw a series of chaotic, disorganized ripples but didn’t hear squeaks.

The ridge-like designs on the bottom of your shoes may organize the bursts to produce a clear, high-pitched sound.

FILE – Los Angeles Clippers guard Chris Paul’s shoes are seen during the second half of an NBA basketball game in New Orleans, Wednesday, March 26, 2014. (AP Photo/Jonathan Bachman, File)

Other researchers have studied these kinds of bursts before, but this sneaker study examines friction happening at much faster speeds. And for the first time, it links the speedy pulses with the squeaking sound they produce.

These insights don’t just serve to satisfy the curiosity of a basketball fan. They could also help answer important practical questions. “Friction is one of the oldest and most intricate problems in physics,” wrote physicist Bart Weber in an editorial accompanying the new research. Yet, despite its practical importance, he wrote, “it is difficult to predict and control.”

Understanding friction better could help scientists better understand how the Earth’s tectonic plates slide and grind during earthquakes, for example, or to save energy by reducing friction and wear.

FILE – Nike sneakers are seen during the second half of an NCAA college basketball game between Florida and Alabama in the semifinals of the Southeastern Conference tournament, Saturday, March 16, 2013, in Nashville, Tenn. (AP Photo/John Bazemore, File)

It could also help eliminate moments off the court when squeaky shoes can be a little awkward or embarrassing, such as in a quiet office hallway.

This research doesn’t offer a fix, though the internet has plenty of advice that may be risky, including rubbing soap or a dryer sheet on the soles. But some of the insights from the study could help to design squeak-free shoes in the future.

For example, one additional experiment found that changing the thickness of the rubber could make the squeak sound lower or higher in pitch. In the future, could we fine-tune our shoes to squeak in a pitch so high we can’t even hear it?

FILE – United States’ LeBron James (6) wears shiny shoes while warming up during a men’s gold medal basketball game against France at Bercy Arena at the 2024 Summer Olympics, Saturday, Aug. 10, 2024, in Paris, France. (AP Photo/Rebecca Blackwell, File)

“We can now start designing for it,” said Weber, who is with the Advanced Research Center for Nanolithography and the University of Amsterdam, in an interview. “We can start making interfaces that either do it if we want to hear this sound, or don’t do it if we don’t want to hear it.”

The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute’s Department of Science Education and the Robert Wood Johnson Foundation. The AP is solely responsible for all content.

Trump administration hits Iran with new sanctions as nuclear talks near

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By FATIMA HUSSEIN

WASHINGTON (AP) — The Trump administration on Wednesday imposed another tranche of sanctions on people and companies accused of enabling Iran’s ballistic missile program, drone production and illicit oil sales as the U.S. presses Tehran to make a deal ahead of nuclear talks this week.

The sanctions against 30 people, companies and ships come as President Donald Trump has massed the largest U.S. buildup of warships and aircraft in the region in decades and has threatened to use military action in a bid to get Iran to constrain its nuclear program.

The latest round of talks between U.S. officials, including envoy Steve Witkoff, and Iranian negotiators via mediator Oman are scheduled for Thursday in Geneva.

The new sanctions imposed by the Treasury Department’s Office of Foreign Assets Control include a list of ships accused of being part of Iran’s “shadow fleet,” which refers to rusting oil tankers that smuggle oil for countries facing stiff sanctions.

Also targeted are drone manufacturing firms, including Qods Aviation Industries, which has supplied drones “to all branches of the Iranian military and buyers in Africa and Latin America,” the Treasury Department said.

Among other things, sanctions deny the people and firms access to any property or financial assets held in the U.S. and prevent American companies and citizens from doing business with them. However, they are largely symbolic because many of them do not hold funds with U.S. institutions.

“Treasury will continue to put maximum pressure on Iran to target the regime’s weapons capabilities and support for terrorism, which it has prioritized over the lives of the Iranian people,” Treasury Secretary Scott Bessent said in a statement.

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Trump and other top administration officials insist that Iran cannot be allowed to develop a nuclear weapon and ramped up pressure months after U.S. strikes in June on three Iranian nuclear sites.

Iran long has maintained its nuclear program is peaceful. It had been enriching uranium up to 60% purity before the June attack — a short, technical step away from weapons-grade levels of 90%.

“We wiped it out and they want to start all over again. And they’re at this moment again pursuing their sinister ambitions,” Trump said during his State of the Union speech Tuesday night. “We are in negotiations with them. They want to make a deal, but we haven’t heard those secret words: We will never have a nuclear weapon.”

A New Age for Houston Politics? 

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Among the youngest cohorts of voting age, there’s a running online joke that they “should’ve been” buying real estate or investing in Bitcoin decades ago, before seemingly everything exploded in value, but instead, alas, they were fetuses.

Part of me wonders if Congressman Al Green, the long-serving 78-year-old now facing 37-year-old Christian Menefee in the primary for the newly drawn historically Black 18th Congressional district, might be feeling something similar. Maybe, if he’d been a little nicer to the crypto industry from his seat on the Financial Services Committee (a position he first nabbed way back in 2005) the super PAC Fairshake—backed in large part by the controversial “techno-optimist” Marc Andreessen’s venture capital firm—wouldn’t be spending $1.5 million to get him out of Congress. 

Money is one thing, but that last-minute outside offensive doesn’t fully explain a 24-point favorability gap (52 to 28 percent), advantage Menefee, the former Harris County Attorney who just a couple weeks ago won the runoff to represent the 18th after it sat vacant for nearly a year. (Menefee won under its current boundaries, not the redrawn lines for the upcoming primary.) 

So what gives? We’re talking about Al Green, the man who stood and shouted in protest at Donald Trump during his 2024 joint address to Congress, wagging his gold-capped cane while his fellow Democrats twiddled on their phones and went mute; who was escorted out of the House chamber minutes Trump’s 2026 State of the Union address for holding a sign reading, “Black people aren’t apes!”, a reference to an AI-generated video Trump posted that depicted the Obamas as apes. Poll after poll has shown that Democrats want their electeds to fight harder. Was this not fighting? Al Green, the former president of the Houston NAACP, who saber-rattled about impeachment in 2017—who actually filed articles of impeachment in July 2019, months before his fellow Democrats would join him. The congressman once confronted Jamie Dimon, CEO of JPMorgan Chase, about his company’s historic ties to slavery. Are you not entertained?

If you ask Green, it isn’t the age difference. In fact, to say as much is, per his office, “ageism.” On January 18, days after Houston Chronicle columnist Joy Sewing wrote that “people are ready for a new generation of leadership,” Green posted a video to Facebook: “I think that the Chronicle quite frankly needs new leadership,” he said, before ripping the newspaper into pieces. But the Chronicle wasn’t the only rag in the laundry bin. Politico called the race a “generational fight,” while The Texas Tribune said it was shaped in part by “the thorny politics of age and seniority.” The New York Times called it “an example of the generational clashes in Democratic primary contests.” Now, the historically Black district—formerly home to civil rights icon Barbara Jordan—might fall into the hands of a 37-year-old for the first time since, well, Barbara Jordan. (The youngest representative to lead the district, at least within the past 50 years, remains Mickey Leland, who assumed office at age 35 in 1979.)

Right now, Houston-area politics is looking decidedly old. Mayor John Whitmire, age 76, already announced he’s running for reelection in 2028. Annise Parker, the former mayor and current frontrunner to replace Lina Hidalgo as Harris County Judge, is 69. The median age of its city council is roughly 55—two years older than that of Dallas, eight years older than that of Austin, and a whopping 20 years older than that of Houston’s median resident

But no congressional district in the nation has faced the bitter consequences of gerontocracy quite like Texas’ 18th. First, the Houston institution, Congresswoman Sheila Jackson Lee, who died of cancer in July 2024 at the age of 74, a year into her 15th term. Next, after a special election, former Houston Mayor Sylvester Turner, age 70, took over the seat. He died just two months into his term. For months and months, Governor Greg Abbott delayed calling a special election to fill the seat—which so happened to help maintain the Republicans’ slim majority in the U.S. House. Then this summer, at Trump’s request and on Abbott’s orders, the Texas Legislature convened in a special session to redraw the state’s congressional maps to add five more GOP-leaning districts. Green’s 9th Congressional District—a majority Black and Hispanic seat—was a direct casualty of the gerrymandering, as it was reconstituted as a red district largely outside of Houston. The 18th lost some of its core territory while absorbing parts of the 9th as well.

For 332 days, residents lacked representation. That left “a wound” among voters, Durrell Douglas, a Houston organizer born and raised in the district, told the Texas Observer. Even Mike Doyle, chair of the Harris County Democratic Party, told Houston Public Media that “anybody who’s looking at the race is obviously legitimately concerned about … we can’t go through this again.” Having won late January’s special election against Amanda Edwards with nearly 70 percent of the vote, Menefee is technically the incumbent. And while Green has correctly pointed out that he didn’t move to a new congressional district, the district swallowed him, Douglas said that he and the rest of the 18th made themselves “overwhelmingly” clear when they voted for Menefee a couple weeks ago. “It’s like, pull a Lloyd Doggett and step aside,” he said, referring to the veteran Austin congressman who, following Republicans’ redistricting, gave up his seat for 36-year-old Greg Casar. 

Christian Menefee may not have been buying real estate as a fetus, but he certainly came of age amid the McMansion boom that, like the show “MTV Cribs,” came crashing down post-2008. (At the time, Menefee was a cashier at HEB.) Late last September, his campaign alluded to the cult-favorite TV series in a commercial, the camera zipping around Menefee’s Tuscan-style suburban home, presenting phrases like “Sued Trump” and “Sued Ken Paxton” in gold-bling pastiche while he spars with a punching bag in the garage. 

Menefee, like Green, wants us to know he’s a fighter. He may not have the traditionally influential endorsements Green has accrued—from Harris County Commissioner Rodney Ellis, age 71, one of the main progressive power brokers in town, to longtime California Congresswoman Maxine Waters, age 87—but he’s taken on heavyweight Republicans, “and won,” he says in the commercial. Among Menefee’s endorsements are members of the comparatively youthful wing of Houston politics. 

(Neither Menefee nor Green’s offices responded to multiple requests for comment.)

Before Menefee won the Harris County Attorney’s seat in 2020, the office was a sleepy afterthought, second fiddle to the District Attorney’s office. Where his predecessor, the Democrat Vince Ryan, politely quibbled with Attorney General Ken Paxton—such as in a lawsuit against Volkswagen for skirting diesel emissions limits—Menefee took him to task, defeating him before the Texas Supreme Court in 2022 to ensure all votes in Harris County were counted.  Both candidates are “speaking to the reality of the moment that we’re living in now,” said Rain Eatmon, leader of an advocacy group in Houston’s Acres Homes. But, once again, the fresh air that Menefee brings really renews a sense of hope, because not only is he closer to the ground, but he’s also closer to the moment.”

One need only view the two candidates’ online policy pages to understand what she means. Where Menefee cites specific problems within the district—“vacant lots, crumbling infrastructure, and a lack of basic necessities like grocery stores”—and advocates for specific positions such as Medicare for All, Green’s page is comparatively vague. He repeatedly assures readers he will “continue to” make efforts for “Immigration” and “Housing,” but specific bills, let alone specific ideas beyond opposing cuts to our already shredded social safety net? No dice. And not to discount Green’s accomplishments on the Homeland Security and Oversight committees, or the money he’s allocated to his district, but since 2007, he’s been the primary sponsor of just four bills

Juli McShay, a local professor and Houston organizer, put it bluntly: “As of late, the way Green has come off as a fighter has been more performative.” Corisha Rogers, 32-year-old co-founder of the Houston Progressive Caucus—which spearheaded the effort to bar John Whitmire from ever again receiving the Harris County Democratic Party’s endorsement—concurred. “We have a lot of performative candidates right now,” she said. “That’s what we want to change.”

Which is why, despite the favorable polling for Menefee, Rogers reminds me, “They’re not Election Day numbers.” 

For one thing, older voters still rule the day in Texas, especially in primaries. Green’s biggest asset is his experience—as Eatmon told me, he’s remembered as “a light in the darkness” through the desegregation years—but his experience may also be his Achilles’ heel. The prevailing feeling of the day is that the country wouldn’t be in this mess if these septuagenarian politicians actually knew what they were doing, and that they’ve failed to pass the reins. Meanwhile, Menefee can authentically campaign on what he terms “affordability” because he lived it—from his helm at the cash register—in a way that those like Green (who were insulated from the worst of the Great Recession) simply didn’t. 

Instead, Green is pushing hard on Menefee’s connection to the crypto lobby. In an impromptu 19-minute press conference on February 13, Green proclaimed: “We cannot allow the crypto industry to own Congress! Mr. Menefee didn’t know what he was doing when he signed on with them.” 

Is it an obvious line of attack? Sure, but it’s not one without merit. 

More than 60 percent of the country believes cryptocurrency is neither safe nor reliable. I’d bet most came to that conclusion merely by using their eyes, watching plain-as-day corruption as Trump and his allies exchange decentralized assets like notes in a classroom. Meanwhile, residents of countless municipalities, from Minneapolis to San Marcos, have organized against the recent boom in data centers—upon which crypto miners and AI titans rely. 

Yet Menefee, on his policy page, says the blockchain offers “the potential to increase trust, transparency, and efficiency—from finance to supply chains,” later offering a conciliatory promise to “protect consumers” and “support innovation.” It’s a rare disconnect for a politician elsewhere so adeptly tapping into voters’ presentiments. 

I asked Durrell Douglas, born and raised in the 18th, if he thought this line of attack might harm him among voters. “My mother is a 59-year-old black woman—she’s your median CD-18 voter,” he said. “She doesn’t know what crypto is.”

The post A New Age for Houston Politics?  appeared first on The Texas Observer.