Samsung Galaxy Note 7 explosions blamed on "aggressive" design           第8週      三星手機爆炸

Who: Samsung

When:  Earlier this year 

Where: Manufacturing engineering company
Why: Battery explosions
How: Performed a teardown of the device

Samsung is having some trouble identifying what went wrong with the Galaxy Note 7, which earlier this year was recalled due to a high number of battery explosions, but someone else believes they have the answer. Manufacturing engineering company Instrumental has performed a teardown of the device, and found that the battery simply did not have enough physical room for error.

The problem had more than one factor, the teardown found. A phone battery is made up of positive and negative layers, with separators to keep them from touching and sparking. In order to streamline the size of the battery and maximise space, these separators may have been too thin. Moreover, Samsung made the battery thinner, removing thickness margins.

When batteries are charged, they swell a little. Around 10 percent extra space is required, but the battery entirely filled its 5.2-millimetre-deep pocket, with very little space around the edges. Add the normal pressures of day-to-day handling, and the risk of explosion goes up.

“Looking at the design,Samsung engineers were clearly trying to balance the risk of a super-aggressive manufacturing process to maximize capacity, while attempting to protect it internally,” the teardown reads. “Samsung took a deliberate step toward danger, and their existing test infrastructure and design validation process failed them.”  When batteries are charged, they swell a little. Around 10 percent extra space is required, but the battery entirely filled its 5.2-millimetre-deep pocket, with very little space around the edges. Add the normal pressures of day-to-day handling, and the risk of explosion goes up.

“Looking at the design,Samsung engineers were clearly trying to balance the risk of a super-aggressive manufacturing process to maximize capacity, while attempting to protect it internally,” the teardown reads. “Samsung took a deliberate step toward danger, and their existing test infrastructure and design validation process failed them.”

Location:http://www.cbsnews.com/news/galaxy-note-7-explosions-caused-by-aggressive-design/

Keywords:
recalled:召回
battery explosions:電池爆炸
teardown:拆卸
device:設備
error:錯誤
layers:層
separators:分離器
streamline :流線型
maximise:最大值
infrastructure:基礎設施
validation process:證實過程
manufacturing:製造業

Nice truck attack: French police arrest eight more suspects                第7週  尼斯恐攻

Who: The French authorities
When: In Bastille Day

Where: At French

Why: Not given

How: Not given

French authorities have made eight new arrests in connection with the Bastille Day truck attack in Nice that left 86 people dead, according to the Paris prosecutor’s office.

The suspects detained on Monday were French and Tunisian, the office said, and had links to the attacker, Mohamed Lahouaiej-Bouhlel, who ploughed a 19-tonne truck down the Promenade des Anglais and into a crowd that had gathered for a 14 July firework display.

All eight men were arrested in the south-eastern Alpes-Maritimes region, which includes Nice.

At least five people already face preliminary terrorism charges in the attack, and are accused of helping Lahouaiej-Bouhlel obtain a pistol and providing other support. It was not immediately clear what the men arrested this week are suspected of.

Islamic State has claimed responsibility for the attack. French authorities say Lahouaiej-Bouhlel, a Tunisian with French residency, was inspired by the extremist group’s propaganda, but they say no evidence has been found that Isis orchestrated the attack.

France remains under a state of emergency after the Nice killings and Isis attacks on Paris last year. The interior minister, Bernard Cazeneuve, said on Tuesday that the threat to France was higher than ever. He said about 300 people had been arrested in investigations into extremist networks so far this year, according to his office.

Also on Tuesday, authorities detained two boys, 14 and 17, in an investigation into a hoax hostage alert at a Paris church, the prosecutor’s office said. The false alarm on Saturday prompted a big police deployment and activation of an app-based terrorism alert system. A 16-year-old detained on Monday remains in custody.

The government is seeking financial compensation from the perpetrators for wasting security services’ time and money, and scaring the public unnecessarily.

Location:https://www.theguardian.com/world/2016/sep/20/nice-truck-attack-french-police-arrest-eight-new-suspects

Keywords:

authorities:當局

Bastille Day:法國國慶日

Tunisian:突尼西亞人

ploughed:著手進行

Alpes-Maritimes:阿爾卑斯濱海省

pistol:手槍

extremist group:極端組織

interior minister:內政部長

hostage:人質

custody:監禁

Japan earthquake: Powerful new tremor in Kumamoto   熊本地震 第6週

Who: Not given

When: In the middle of the night
Where: The southern Japanese city of Kumamoto

Why: Not given

How: A more powerful earthquake has rocked 

A more powerful earthquake has rocked the southern Japanese city of Kumamoto in the middle of the night, a day after an earlier tremor killed nine people.

The magnitude-7.3 quake hit at a depth of 10km (six miles) at 01:25 on Saturday (15:25 GMT on Friday) in Kyushu region. At least three people died and hundreds were injured.

In one town near the coast, the city hall has been so badly damaged there are fears it could collapse. A hospital has been evacuated because it is no longer safe.

Thousands of people have fled on to the streets and into parks - where they are huddled under blankets looking dazed and afraid, our correspondent says.

But there are numerous reports of people trapped inside buildings, including at least 60 inside an old people's home.

That quake sparked a huge tsunami and nuclear meltdown at a power plant in Fukushima.

Most of those who died in Thursday's quake were in the town of Mashiki where an apartment building collapsed and many houses were damaged.

More than 1,000 people were injured.


Some 40,000 people had initially fled their homes, with many of those closest to the epicentre spending the night outside, as more than 130 aftershocks had hit the area.


Location:http://www.bbc.com/news/world-asia-36059487

Key words:

magnitude-7.3 quake :震級7.3
Kyushu:九州
evacuated:疏散
huddled:擁擠
tsunami:海嘯
nuclear meltdown:核能外洩
power plant:發電廠
Fukushima:福島
Mashiki:益城町
epicentre:震央

Elon Musk spacex rocket landing

Spacex火箭著陸  第5週

Who:The epic rocket

When:April 8
Where:Not given

Why:Humanity's march out into the cosmos
How:Landing SpaceX

The epic rocket landing SpaceX pulled off today (April 8) is a big step forward in humanity's march out into the cosmos, company founder and CEO Elon Musk said.

SpaceX managed to land the first stage of its Falcon 9 rocket on a robotic "drone ship" in the Atlantic Ocean during the successful launch of the company's uncrewed Dragon cargo capsule toward the International Space Station from Florida's Cape Canaveral Air Force Station this afternoon.

The first-of-its-kind touchdown is an important milestone in SpaceX's quest to develop completely reusable rockets, which Musk has said could revolutionize spaceflight by reducing launch costs by a factor of 100. 

"I think it's another step toward the stars," Musk said during a post-launch press briefing today. "In order for us to really open up access to space, we've got to achieve full and rapid reusability. And to be able to do that for the primary rocket booster is going to [have] a huge impact on cost."

SpaceX has landed a Falcon 9 first stage once before, bringing the booster back on dry land at Cape Canaveral during a satellite launch this past December. But today's touchdown was the first successful drone-ship landing after four near-misses; similar attempts in January 2015, April 2015, January 2016 and March 2016 ended with the rocket hitting the drone ship but then toppling over and exploding on its deck.

"The rocket landed instead of putting a hole in the ship or tipping over, so we're really excited about that," Musk said today.

SpaceX would ideally like to land all of its rockets on terra firma, because doing so streamlines the testing and reflight processes significantly. But boosters on certain missions cannot carry enough fuel to make it all the way back to land, so it's important to be proficient at ocean landings as well, Musk said.

Location:http://www.space.com/32520-spacex-rocket-landing-step-to-stars-elon-musk.html

Key words:

cosmos:宇宙
uncrewed:鬆開
Cape Canaveral Air Force Station:卡納維拉爾角空軍基地
milestone:里程碑
spaceflight:宇宙飛航
terra firma:穩固地基
streamlines:流線