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Climate change delegates traveling aboard private jets known to release more carbon dioxide emissions have added to the controversy surrounding the United Nations Climate Change Conference (COP27) in Sharm el-Sheikh, Egypt.

Hundreds of environmental activists stopped private jets from taking off from Amsterdam’s Schiphol Airport the day before the conference started last week.

Other tech companies are not far behind.

Jeff Bezos founded Amazon.com Inc., has achieved the unenviable milestone of being the first public company to lose a trillion dollars in market valuation, Bloomberg.

How has Amazon stock fared in 2022?


Sundry Photography/iStock.

SAN FRANCISCO — Two weeks after closing a $44 billion deal to buy Twitter, Elon Musk painted a bleak financial picture for the social media company and outlined a series of changes for employees in his first companywide emails to staff.

In two emails sent to workers late on Wednesday, Mr. Musk said the economy was challenging. He added that he planned to end Twitter’s remote work policy and wanted employees to renew their focus on generating revenue and fighting spam.

“Sorry that this is my first email to the company, but there is no way to sugarcoat the message,” Mr. Musk, 51, wrote in one email. “The economic picture ahead is dire.” Twitter was too heavily dependent on advertising and vulnerable to pullbacks in brand spending, he added, and would need to bolster the revenue it gets from subscriptions.

This past Monday (Nov. 7th) I was given a behind the scenes look at Dr. Alfonso Fasano’s neuromodulation clinic, one of the busiest of its kind in the world.

On his schedule for that day were about 25 patients, which is fairly typical for him. But these were not exactly 25 patients that a typical doctor might see in a given day. They were patients whom the Canadian medical system had funneled to him, individuals who not even most movement disorder specialists, let alone neurologists or general practitioners, could properly treat. For him and his team though, it was just another Monday.

In the effort to efficiently convert heat into electricity, easily accessible materials from harmless raw materials open up new perspectives in the development of safe and inexpensive so-called thermoelectric materials. A synthetic copper mineral acquires a complex structure and microstructure through simple changes in its composition, thereby laying the foundation for the desired properties, according to a study published recently in the journal Angewandte Chemie.

The novel synthetic material is composed of copper, manganese, germanium, and sulfur, and it is produced in a rather simple process, explains materials scientist Emmanuel Guilmeau, CNRS researcher at CRISMAT laboratory, Caen, France, who is the corresponding author of the study. The powders are simply mechanically alloyed by ball-milling to form a precrystallized phase, which is then densified by 600 degrees Celsius.

The Celsius scale, also known as the centigrade scale, is a temperature scale named after the Swedish astronomer Anders Celsius. In the Celsius scale, 0 °C is the freezing point of water and 100 °C is the boiling point of water at 1 atm pressure.