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SAN DIEGO (KGTV) — Nearly three-quarters of the students in San Diego County are currently learning from home, and those numbers don’t make a lot of sense to MIT professor Martin Bazant.Bazant is one of the creators of the COVID-19 Indoor Safety Guideline. The free online tool simulates the fluid dynamics of respiratory droplets in various kinds of rooms to show users the risk of different indoor environments.“If you run the numbers for a typical classroom, especially if the students and the teachers are wearing masks, then the amount of time in the room can be very significant,” Bazant said. “Essentially those people could spend a week in the classroom and not have a problem.”Bazant says the six-foot rule that has largely determined which businesses can stay open is overly simplistic. In some cases, he says the rule creates a false sense of security. In other situations, he says it causes the closure of businesses or schools that could safely operate.“If you place nursing home beds six feet apart in a shared room, they are absolutely not safe,” he said. But he said well-ventilated classrooms, with teachers and students in masks, are another story.“It's only the United States where we follow the six-foot rule. That's given by the CDC. The World Health Organization all along has been saying one meter, which is about three feet. If you simply followed the one-meter rule, all our schools would be open, as they are in most of the world right now,” he said.Bazant and his colleague John Bush said they set out to design a tool that would reveal the risk of transmission based on science, not guesswork.Users start by selecting a room type, like a classroom or an airplane. From there, they can control a wide array of variables to dial in the risk, like the room size, the ceiling height, and the ventilation and filtration systems.From there, users can further tune the model by human behavior. How many people are in the room? Are they whispering, shouting or singing? How many are wearing masks?Mask usage is a critical component, Bazant says. The model quickly reveals the challenges of maskless activities in rooms with poor ventilation. Put five people without masks in a 400 square foot room with closed windows, and it becomes unsafe after 33 minutes.Bazant says studies on super spreader events show in indoor environments, the distance from an infected person doesn’t matter. Infected droplets spread and mix throughout the room like second-hand smoke from a cigarette.But with masks trapping droplets and diverting them upwards like a chimney, an environment like an airplane could be safe for several hours, according to the model. With more than 95% of the passengers and crew wearing surgical masks, a Boeing 737 could support 200 people -- around full capacity depending on the configuration -- for 18 hours. 2850

SAN DIEGO (KGTV) - Police are investigating the suspicious death of a man whose body was found near several Logan Heights businesses. 146

SAN DIEGO (KGTV) -- Police arrested a man they say reportedly stole cell phones and other items from people at SDSU.Anthony Joseph Green was arrested Wednesday on the 6000 block of Lindo Paseo for charges related to burglary and theft in the College Area.According to the victims, Green inquired about cell phones and other items through an app called OfferUp, as well as other online sales apps.RELATED: Aztec students robbed near campus, police search for suspectsGreen is then accused of meeting with victims on campus, stealing the items, then running away without giving the victims cash.According to campus police, all the victims were identified as non-students. 682

SAN DIEGO (KGTV) — North Park residents will celebrate this holiday season with an annual tradition intact — at least for one more year.For 56 years, the Toyland Parade has delighted crowds in North Park during the holiday season. But much like a parade balloon, financial troubles have loomed over organizers.Last year, the parade was briefly canceled after former-host Victoria House Corporation said it had lost support from sponsors. Then in March 2019, the community learned that a Victoria House Corporation organizer was accused of fraud and pocketing 2018 parade donations and fees after the cancellation.RELATED:North park donut shop defends homeless manSan Diego deputies share tips to protect your presents10 special holiday events coming to San DiegoNorth Park Main Street (NPMS), a volunteer-based non-profit, pledged ,000 to the parade. That donation and monetary support from the community helped 2018's parade continue as planned. NPMS has since taken the parade over, as well.But the parade is once again in trouble. Angela Landsberg, executive director with North Park Main Street, says support from the local Lions Club has saved 2019's parade, but 2020 is a different story."Our presenting sponsor North Park Lions Club have ensured that it's going to go off this year, but if we don't raise enough money this year to get us carried through our planning for next year, because these things take a long time to plan, then this will be the final year," Landsberg told 10News. The organization is asking for the community to once again step in to make sure the parade steps off on University Avenue next year. Donations are being accepted on the NPMS website here.The Toyland Parade will start at 11 a.m. on Sunday, Dec. 8, rain or shine. 1766

SAN DIEGO (KGTV) - President Trump issued an order Monday prohibiting Broadcom’s attempt to take over San Diego-based Qualcomm, citing national security.Broadcom had made several efforts to buy the chip maker in recent months. All offers were rejected by Qualcomm, which said the bids undervalued the company.The most recent offer, made in February, was over 1 billion. RELATED: Qualcomm delays shareholder vote on Broadcom takeoverThe possible takeover raised security concerns and led to an investigation by the Committee on Foreign Investment in the U.S. In Monday's release, President Trump reportedly cited national security concerns."There is credible evidence that leads me to believe that Broadcom Ltd. ... might take action that threatens to impair the national security of the United States," the president said in a release, Bloomberg reported.The concerns echo issues voiced in a letter to Trump by Congressman Duncan Hunter, who serves California's 50th District including much of San Diego's East County.RELATED: Paul Jacobs leaves Qualcomm's executive management"I have seen San Diego defense companies suffer massive theft of intellectual property by agents of China’s government and the defense industrial complex with which it is inextricably entwined," Hunter said in a release. "Fact remains, if Broadcom consumes Qualcomm, theft of their intellectual property by China becomes easier.Singapore-based Broadcom has voiced the intention to move its headquarters to the U.S. to ease concerns over the proposed takeover. Hunter responded to that intention saying, "press releases of intentions is not the same as physical action."The takeover attempts coincided with changes in corporate leadership.RELATED: Qualcomm rejects Broadcom's 'best and final' offerOn Friday, Qualcomm announced executive Paul Jacobs -- the son of Qualcomm founder Irwin Jacobs - "will no longer serve in an executive management capacity" but "will continue to serve on the Qualcomm Board."Under the terms of the Presidential Order, all of Broadcom’s director nominees are also disqualified from standing for election as directors of Qualcomm, according to the company.Qualcomm was also ordered to reconvene its 2018 Annual Meeting of Stockholders on the earliest possible date, which is March 23.If Broadcom had been allowed to buy Qualcomm, it would have made the firm the world’s third-largest chip company behind Intel and Samsung.Any buyout would also have had a significant impact on San Diego's economy. Qualcomm was founded in 1985 and is one of the region's largest employers. It employs more than 33,000 people worldwide. 2684