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The week in 31 photos

CNN - Fri, 2019-07-12 10:44
Take a look at 30 photos of the week from July 5 through July 11.

Stop Surveillance Humanitarianism

NY Times - Fri, 2019-07-12 10:33
Requiring biometric data, like iris and facial scans, sets a dangerous precedent for vital aid.

Gay and Once Divorced, a Canadian Rabbi Broadens Judaism’s Tent

NY Times - Fri, 2019-07-12 10:33
Rabbi Lisa Grushcow, a Rhodes scholar who leads a Montreal synagogue, has won over many skeptics. Even a local Orthodox rabbi said, “Rabbi Grushcow is my rabbi.”

Charter gets final approval to stay in NY despite breaking merger promise

Ars - Fri, 2019-07-12 10:32

Enlarge / A Charter Spectrum vehicle in West Lake Hills, Texas. (credit: Tony Webster)

Charter Communications has received final approval to stay in New York State despite violating merger commitments related to its 2016 purchase of Time Warner Cable.

The New York State Public Service Commission (PSC) had revoked its approval of the merger and ordered Charter to sell the former Time Warner Cable system in July 2018. Charter repeatedly failed to meet deadlines for broadband expansions that were required in exchange for merger approval, state officials said.

But Charter and state officials struck a deal in April, and yesterday the PSC approved the settlement.

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U.S. Prosecutors File New Charges, Including Child Pornography, Against R. Kelly

NY Times - Fri, 2019-07-12 10:25
The singer was arrested in Chicago on Thursday night over a 13-count indictment, officials said.

Buying Lattes Is Not Keeping You From Being Rich

NY Times - Fri, 2019-07-12 10:25
Have as many lattes as you want. Just make sure you focus on the handful of things that will make a major difference to your financial health, a financial adviser says.

Maternal obesity may raise child’s cancer risk

Futurity.org - Fri, 2019-07-12 10:23

Babies born to mothers who have obesity are more likely to develop cancer in early childhood, a new study reports.

Using Pennsylvania birth records, researchers found a correlation between pre-pregnancy body-mass index (BMI) in mothers and subsequent cancer diagnosis in their offspring, even after correcting for known risk factors, such as newborn size and maternal age. The study appears in the American Journal of Epidemiology.

“Right now, we don’t know of many avoidable risk factors for childhood cancer,” says lead author Shaina Stacy, postdoctoral scholar in the University of Pittsburgh Public Health epidemiology department and the Hillman Cancer Center. “My hope is that this study can be, in a way, empowering and also motivating for weight loss.”

Researchers pored through nearly 2 million birth records and about 3,000 cancer registry records filed in Pennsylvania between 2003 and 2016 and found that children born to mothers who have severe obesity—BMI above 40—had a 57 percent higher risk of developing leukemia before age 5. Weight and height also individually associated with increased leukemia risk.

Further analysis showed that it wasn’t simply that larger women were giving birth to larger babies or that heavier women tended to be older—known risk factors for childhood cancer—but rather, a mother’s size independently contributed to her child’s risk.

The researchers think the root cause of the effect they’re seeing has something to do with insulin levels in the mother’s body during fetal development, or possibly changes to the mother’s DNA expression that passes to her offspring.

Importantly, not all levels of obesity carry the same risk. Among the women with obesity in the study, higher BMI came with higher cancer rates in their children. So, even small amounts of weight loss can translate to a real reduction in risk, Stacy says.

“We are dealing with an obesity epidemic in this country,” says senior author Jian-Min Yuan, professor of epidemiology and co-leader of the cancer epidemiology and prevention program at the Hillman Cancer Center.

“From a prevention point-of-view, maintaining a healthy weight is not only good for the mother, but also for the children, too.”

Additional authors are from the University of Pittsburgh and the Pennsylvania Department of Health. The National Cancer Institute and the Arnold Palmer Endowment Fund funded the work.

Source: University of Pittsburgh

The post Maternal obesity may raise child’s cancer risk appeared first on Futurity.

The Daily 202: As Alex Acosta resigns, the #MeToo reckoning continues

Washington Post - Fri, 2019-07-12 10:21
The Epstein case highlights the systemic challenges in combating sex crimes.

Miami's Little Haiti wasn't a target for developers, until the seas started to rise

CNN - Fri, 2019-07-12 10:14
In a city where "sunny day floods" increased 400% in a decade, rising seas are changing the old real estate mantra of "location, location, location."

Video of NFL star jump over bull goes viral

CNN - Fri, 2019-07-12 10:13
Washington cornerback Josh Norman leaped over a bull in Pamplona, Spain.

Watch a Coast Guardsman jump onto a moving submarine

CNN - Fri, 2019-07-12 10:12
Talk about a high stakes intervention.

Wireless charging can mess up your phone’s battery

Futurity.org - Fri, 2019-07-12 10:04

Wirelessly charging your phone, while highly convenient, risks depleting the life of devices using typical lithium-ion batteries (LIBs), report researchers.

Consumers and manufacturers have ramped up their interest in this convenient charging technology, called inductive charging, abandoning fiddling with plugs and cables in a favor of just setting the phone directly on a charging base.

Standardization of charging stations, and inclusion of inductive charging coils in many new smartphones has led to rapidly increasing adoption of the technology. In 2017, 15 automobile models announced the inclusion of consoles within vehicles for inductively charging consumer electronic devices, such as smartphones—and at a much larger scale, many are considering it for charging electric vehicle batteries.

Issues with wireless charging

Inductive charging enables a power source to transmit energy across an air gap, without the use of connecting wire but one of the main issues with this mode of charging is the amount of unwanted and potentially damaging heat it can generate.

There are several sources of heat generation associated with any inductive charging system—in both the charger and the device its charging. the fact that the device and the charging base are in close physical contact makes this additional heating worse. Simple thermal conduction and convection can transfer any heat generated in one device to the other.

In a smartphone, the power receiving coil is close to the back cover of the phone (which is usually electrically non-conductive) and packaging constraints necessitate placement of the phone’s battery and power electronics in close proximity, with limited opportunities to dissipate heat generated in the phone, or shield the phone from heat the charger generates.

It has been well-documented that batteries age more quickly when stored at elevated temperatures and that exposure to higher temperatures can thus significantly influence the state-of-health (SoH) of batteries over their useful lifetime.

The rule of thumb (or more technically the Arrhenuis equation) is that for most chemical reactions, the reaction rate doubles with each 10 °C (18 °F) rise in temperature. In a battery, the reactions which can occur include the accelerated growth rate of passivating films (a thin inert coating making the surface underneath unreactive) on the cell’s electrodes. This occurs by way of cell redox reactions, which irreversibly increase the internal resistance of the cell, ultimately resulting in performance degradation and failure. A lithium ion battery dwelling above 30 °C (86 °F) is typically considered to be at elevated temperature exposing the battery to risk of a shortened useful life.

Guidelines battery manufacturers have issued also specify that the upper operational temperature range of their products should not surpass the 50−60 °C (122−140 °F) range to avoid gas generation and catastrophic failure.

These facts led the researchers to carry out experiments comparing the temperature rises in normal battery charging by wire with inductive charging. However the researchers were even more interested in inductive charging when the consumer misaligns the phone on the charging base. To compensate for poor alignment of the phone and the charger, inductive charging systems typically increase the transmitter power and/or adjust their operating frequency, which incurs further efficiency losses and increases heat generation.

This misalignment can be a very common occurrence as the actual position of the receiving antenna in the phone is not always intuitive or obvious to the consumer using the phone. The research team therefore also tested phone charging with deliberate misalignment of transmitter and receiver coils.

Comparing charging methods

The researchers tested all three charging methods (wire, aligned inductive, and misaligned inductive) with simultaneous charging and thermal imaging over time to generate temperature maps to help quantify the heating effects.

In the case of the phone charged with conventional mains power, the maximum average temperature reached within 3 hours of charging did not exceed 27 °C (80.6 °F).

In contrast, for the phone charged by aligned inductive charging, the temperature peaked at 30.5 °C (86.9 °F) but gradually reduced for the latter half of the charging period. This is similar to the maximum average temperature observed during misaligned inductive charging.

In the case of misaligned inductive charging, the peak temperature was of similar magnitude (30.5 °C (86.9 °F)) but this temperature was reached sooner and persisted for much longer at this level (125 minutes versus 55 minutes for properly aligned charging).

Regardless of the mode of charging, the right edge of the phone showed a higher rate of increase in temperature than other areas of the phone and remained higher throughout the charging process. A CT scan of the phone showed that this hotspot is where the motherboard is located.

Also noteworthy was the fact that the maximum input power to the charging base was greater in the test where the phone was misaligned (11 watts) than the well-aligned phone (i watts). This is due to the charging system increasing the transmitter power under misalignment in order to maintain target input power to the device.

The maximum average temperature of the charging base while charging under misalignment reached 35.3 °C (95.54 °F), two degrees higher than the temperature researchers detected when the phone was aligned, which achieved 33 °C (91.4 °F). This is symptomatic of deterioration in system efficiency, with additional heat generation attributable to power electronics losses and eddy currents.

The researchers note that future approaches to inductive charging design can diminish these transfer losses, and thus reduce heating, by using ultrathin coils, higher frequencies, and optimized drive electronics to provide chargers and receivers that are compact and more efficient and can be integrated into mobile devices or batteries with minimal change.

In conclusion, the research team found that inductive charging, while convenient, will likely lead to a reduction in the life of the mobile phone battery. For many users, this degradation may be an acceptable price for the convenience of charging, but for those wishing to eke out the longest life from their phone, cable charging is still recommended.

Source: University of Warwick

The post Wireless charging can mess up your phone’s battery appeared first on Futurity.

Race to find missing girl, 9, last seen with couple who drowned themselves

CNN - Fri, 2019-07-12 10:04
Search crews on Friday raced to find a missing 9-year-old Chinese girl in caves and waters along the East China Sea, as the deepening mystery of her weeklong disappearance continued to grip the nation.

What Is Nancy Pelosi Thinking?

NY Times - Fri, 2019-07-12 10:03
And can “woke capitalism” be trusted?

Train brings relief to city running out of water

CNN - Fri, 2019-07-12 09:57
A train carrying millions of liters of water rolled into the southern Indian city of Chennai for the first time on Friday, providing desperately needed relief to residents who have been facing an acute water shortage for the past month.

Wimbledon Preview: Federer vs. Nadal in the Semifinals

NY Times - Fri, 2019-07-12 09:52
The longtime rivals have played each other 39 times, but only three of those matches have been at the All England Club.
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