乐山下肢肌肉解剖模型(上海正畸分类) (今日更新中)

SAN DIEGO (KGTV) -- Officials with two of Southern California's largest schools districts have announced closures effective Monday, March 16, as a precautionary measure to prevent the spread of the Coronavirus.The Los Angeles Unified School District and the San Diego Unified School District said Friday that campuses are expected to reopen April 6.RELATED COVERAGE: What's been canceled, postponed in San Diego, nationally due to coronavirusThe closures will keep a combined 750,000 students off campus for three weeks heading into spring break. LAUSD and SDUSD join numerous other school systems taking similar measures as the number of COVID-19 cases continue to rise.Superintendent Austin Beutner of Los Angeles and Superintendent Cindy Marten of San Diego have issued the following joint statement: “California has now entered a critical new phase in the fight to stop the spread of the Covid-19 pandemic,” they said. “There is evidence the virus is already present in the communities we serve, and our efforts now must be aimed at preventing its spread. We believe closing the state’s two largest school districts will make an important contribution to this effort. For that reason, we plan to close, effective Monday, March 16. “Later today, we will be providing students, parents and staff with more information on our plans to continue providing learning opportunities for students during the closure. We have also directed staff at both districts to prepare to continue providing nutrition and other supports through family resource facilities.” The boards of Los Angeles Unified and San Diego Unified School Districts have unanimously approved this action. San Diego Unified plans to reopen schools on April 6th, unless conditions call for an extension. SDUSD's closures will shutter 113 elementary schools, 24 middle schools, 4 atypical schools, 10 alternative schools, 27 high schools and 25 charter schools.Friday's announcement comes after San Diego County officials issued a public health order banning mass gatherings of 250 people or more through the end of March.READ: San Diego County officials ban large gatherings 2144

SAN DIEGO (KGTV) - Police were called to the campus of Rancho Bernardo High School after multiple threatening messages were discovered at the school Monday morning. 172

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) — More than 900 local veterans can expect some Valentine's Day appreciation in their mailboxes soon.As part of Rep. Mike Levin's “Valentines for Veterans” program, the holiday cards were collected from 49th District constituents thanking veterans for their service.“Our courageous military men and women earn our gratitude every day. Crafting Valentines for the upcoming holiday is a small way to show veterans in our district appreciation for risking their lives in defense of our nation,” said Rep. Levin. “That is why I am launching the “Valentines for Veterans” program in California’s 49th Congressional District, so our community can say thank you while spreading a little merriment this Valentine’s Day to our local heroes.”The Valentine's Day cards will now be sent out to local veterans. 821

SAN DIEGO (KGTV) -- Police were involved in a chase that led to a standoff in Valencia Park Wednesday night.Video from Sky10 showed police chasing the suspect through residential streets. The chase began after police spotted the woman, who is wanted for burglaries and identity thefts throughout San Diego County, driving on the 805.The woman refused to stop and led both Harbor Police and San Diego Police on a slow-speed chase. Police then used spike strips that appeared to flatten one of the vehicle’s tires.The driver stopped a short distance after the spikes were used. Police could then be seen taking a police K9 out of one of the vehicles.The woman refused to get out of her car after police threatened to send in the K9 unit. The suspect sat in her car until officers approached the vehicle, broke the drivers side window, and pulled her out of the car.In video captured from the scene, the woman could then be seen being taken into custody.Live video captured by Sky10 shows the whole incident. Watch the video in the player below:  1066

来源：资阳报