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Día Internacional de la Mujer 2011.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" Visita la página de Madres Solas Aquí. Más »

Entrega de Silla de Ruedas.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" Visita la página de Madres Solas Aquí. Más »

Compartiendo con nuestras socias y socios de la tercera edad de Molino Abajo, Temoaya, Estado de México.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" Visita la página de Madres Solas Aquí. Más »

Visita la página de “Código Ayuda A.C.” Aquí

Entrega de Reconocimiento por la AMS a la labor de Gabriela Goldsmith Presidenta de \\\\\\\"Código Ayuda A.C.” Más »

Día de la Niñez 2011 con nuestras socias y socios de San Lorenzo Tepaltitlán, Toluca, Estado de México.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" Visita la página de Madres Solas Aquí. Más »

Entrega de Silla de Ruedas.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" Visita la página de Madres Solas Aquí. Más »

“Yo Me Declaro Defensor” de los Defensores de Derechos Humanos

Participación en la campaña “Yo Me Declaro Defensor” de los Defensores de Derechos Humanos por la Alta Comisionada de los Derechos Humanos de la ONU Navy Pillay. Más »

Entrega de Reconocimiento al Lic. Enrique Peña Nieto por su apoyo como gobernador a los grupos vulnerables de nuestra Asociación.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" Visita la página de Madres Solas Aquí. Más »

Compartiendo con nuestras socias y socios de la tercera edad en Molino Abajo, Temoaya, Estado de México.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" ¡Visita la página de Madres Solas Aquí! Más »

Compartiendo con nuestras socias y socios de la tercera edad en Molino Abajo, Temoaya, Estado de México.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" ¡Visita la página de Madres Solas Aquí! Más »

Compartiendo con nuestras socias y socios de la tercera edad en Molino Abajo, Temoaya, Estado de México.

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" ¡Visita la página de Madres Solas Aquí! Más »

Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" ¡Visita la página de Madres Solas Aquí! Más »

Thelma Dorantes Autora y Actriz principal de la obra de Teatro \\\\

Visita de Thelma Dorantes a las oficina de la Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" en Toluca, Estado de México. Más »

Thelma Dorantes Autora y Actriz principal de la obra de Teatro \\\\

Visita de Thelma Dorantes a las oficina de la Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" en Toluca, Estado de México. Más »

Thelma Dorantes Autora y Actriz principal de la obra de Teatro \\\\

Visita de Thelma Dorantes a las oficina de la Asociación de Madres Solteras y Grupos Vulnerables para el Desarrollo Social \\\\\\\"Por un Trato más digno Yo Madre Soltera Aquí Estoy A.C.\\\\\\\" en Toluca, Estado de México. Más »

Premio Nacional del Trabajo 2012.

Entrega a los trabajadores de la Dirección de Organización y Desarrollo Administrativo de la Universidad Autónoma del Estado de México del Premio Nacional del Trabajo 2012 por la Secretaría de Trabajo y Previsión Social del Gobierno de México. Más »


Tackling student food insecurity with SwipeShare

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: MIT News

In its first full week of operation, SwipeShare — a new program that allows students who are on a meal plan to donate their guest swipes to other students struggling with food insecurity — garnered 673 donated meals. The program was launched on Dec. 4 as a partnership between the Division of Student Life (DSL), Undergraduate Association (UA), and Graduate Student Council (GSC), and is one part of an ongoing, multi-pronged approach to tackling challenges students can face getting enough to eat.

“It doesn’t matter who you are. Any student can face food insecurity, so any student who expresses they’re facing this difficulty can get the meal swipes,” says Alexa Martin, the UA’s vice president.

GSC President Sarah Goodman says financial insecurity in general “is a significant problem for many graduate students, particularly those with families.”

“Among other programs that provide assistance to grad students in need, we hope that SwipeShare will provide another avenue for students to get support in a way that works best for them,” Goodman says.

Accessing the program — either by donating guest swipes or requesting a meal — is designed to be simple. Students who wish to donate their swipes can go to studentlife.mit.edu/swipeshare (certificate required) to see how many guest swipes they have for the semester and then select how many they would like to donate. Undergraduates who wish to receive the swipes can contact a dean in Student Support Services, and graduate students who need meals can reach out to Naomi Carton, the associate dean for Residential Life and Dining.

There is no application or qualification process, and all requests will be handled discreetly.

“We want the bar to be low so there’s no paperwork, and it doesn’t matter if students are receiving financial aid or not,” says DSL Senior Associate Dean David Randall. “Students only need to come in and tell us what their need is so that we can figure out a way to help.”

Vice President and Dean for Student Life Suzy Nelson calls SwipeShare a “creative and caring program” and “a solid first step in the right direction” to address food insecurity among students. DSL, in collaboration with students, staff, and faculty, is also focused on developing and implementing other strategies.

For instance, DSL has issued a request for proposal for a new dining contract that aims to create a “food secure” campus and promote the availability of economically-priced, healthful food across campus. The DSL will also implement a new residential meal plan program that permits roll-over meals, a change that would allow the SwipeShare program to expand beyond collecting just guest swipe donations. Under the current meal plan, regular meal swipes expire at the end of each week, while guest swipes accumulate throughout the semester, allowing students to donate unused meals.

Meanwhile, the Food Insecurity Solutions Committee, chaired by Randall, has been meeting throughout the fall semester. The group, which consists of students, faculty, and staff, is responsible for reviewing survey data, consulting with members of the MIT community, examining how peer institutions address food insecurity, and exploring the feasibility of implementing similar models at the Institute. The committee’s report is due to be released at the start of the spring semester. Also, an emergency grant fund was recently established to help students who are struggling to afford necessities — such as food and winter clothing — or to cover unforeseen, essential expenses. Undergraduates are encouraged to contatct Student Support Services for more information, while graduate students can reach out to Naomi Carton.

Finally, a new coalition called Accessing Resources MIT (ARM) is also in its early stages. The coalition responds to work done by the student organization, Class Awareness Support and Equality (CASE), and is in the process of completing an inventory of how MIT supports students in high economic need; assessing how those resources and services are advertised to students; and identifying any gaps and potential solutions for raising awareness about the resources that can help, especially among incoming students and their families.

Bridging the gap between citizens and scientists

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: MIT News

Known worldwide as a center of leading science and engineering research, MIT also boasts an influential program whose graduates advance scientific knowledge in another way — as science writers working for a broad spectrum of news outlets ranging from the online Atlas Obscura to National Geographic and The Washington Post.

Staffed by leaders in the field that include bestselling authors Seth Mnookin (“Panic Virus: The True Story Behind the Vaccine-Autism Controversy”) and Alan Lightman (“Einstein’s Dreams”), as well as award-winning documentary filmmaker Thomas Levenson (NOVA’s “Einstein Revealed”), the MIT Graduate Program in Science Writing (GPSW) prepares students to inform the public about critical issues ranging from medical breakthroughs to climate change. Graduates of the one-year master’s program have earned some of the top awards in journalism, including the Pulitzer Prize.

GPSW graduate Lisa Song ’09 was on the team at Inside Climate News, a web-based nonprofit covering energy and environmental science, that won the 2013 Pulitzer Prize for National Reporting for its seven-month investigation of a million-gallon tar sands oil spill in the Kalamazoo River. Song was also on a reporting team named a finalist for the 2016 Pulitzer Prize for Public Service. Today she writes for ProPublica, an nonprofit newsroom that produces investigative journalism.

Phil McKenna SM ’07, who has written for Smithsonian and National Geographic, won the 2013 AAAS Kavli Science Journalism Award and the 2014 NASW Science in Society Award for a feature written for the online magazine Matter on gas leaks under U.S. cities.

“These are the kind of investigative stories that might be key to changing policy,” McKenna says.

New platforms and formats

As a group, MIT’s GPSW graduates demonstrate that it’s possible to flourish in journalism despite the current turmoil in the industry.

“Virtually every metropolitan daily newspaper has eliminated its dedicated science section, which means a loss of many staff jobs,” says Mnookin, director of the program and the Ford Career Development Associate Professor in Comparative Media Studies/Writing.

Yet even as traditional journalism platforms collapse, Mnookin says “we are seeing the creation of new outlets that are doing incredible work and that fill a void.” These include not-for-profit websites and subscription models for old and new publications. Here, many of the GPSW graduates find positions where they thrive producing works that shine light on the exciting, complex, and challenging issues that emerge at the forefront of science and technology.

Carolyn Johnson SM ’04, former lead science writer for The Boston Globe who now covers health care issues and policy for The Washington Post, says “people are reading/watching/consuming more than ever before. The value of explaining things about how the world works remains despite the uncertainty about the future.”

Inside Climate News reporter Zahra Hirji SM ’13 agrees. That’s one reason she made switched to science writing from geology, her undergraduate major at Brown University. Hirji realized during a summer internship tracking lava flows that she would rather write about earth science than conduct scientific research in a lab. When she determined to make a career in science journalism, she chose GPSW because of its support for long-form writing.

“I had a story kicking around in my head tied to the risk of a future volcanic eruption and its impact on Hawaii,” she says. “I knew I’d need resources and editorial help for my story, and it was obvious MIT’s program was the one.”

With instruction from such GPSW professors as Marcia Bartusiak, a physicist and journalist, Hirji learned how to research and dig deep into her topic. “Sinking my teeth into different areas, my writing dramatically improved,” she says. With the program’s assistance, she visited Hawaiian archives so she could re-construct what happened in a 1984 volcanic eruption.

A passion for facts and truth 

The passion for relating important stories is central to the program, Mnookin says. “I tell all our students that unless you’re in love with journalism, it’s not something you should do.”

For those who do love the field, GPSW is a special place, graduates say, one that provides them with both the means and the methods to expand public understanding of science, technology, and medicine.

“It was like the Camelot of science writing, where you could work one-on-one with top people in the field, which was both amazing and terrifying,” McKenna says. “There were so many opportunities in and out of the classroom; it was drinking from the proverbial MIT fire hose.”

McKenna’s initial journalistic interest was conservation biology, from condor rehabilitation to whooping crane migration. But at GPSW, he says, “I was pressed to write outside my comfort zone and to learn about fields like physics and astronomy, so I could write on a range of topics.”

For her part, Johnson credits the 15-year-old program’s supportive faculty with kick-starting her successful writing career. She joined The Boston Globe soon after graduating, became the newspaper’s lead science writer in 2008, and launched the paper’s “Science in Mind” blog in November 2012. “I had never even done an interview prior to the program,” she says.

Similarly, Cara Giaimo SM ’15, a staff writer for the online Atlas Obscura, says, “I came in without a lot of newswriting experience, and with only a cursory understanding of the contemporary media landscape. But over the course of the program, I learned what I had to do to understand a topic, write a story, and build my career as a writer.”

With a background in field biology, Giaimo wrote her MIT thesis about two members of the urban wildlife in Austin, Texas — a bat population the public rallied around, and a salamander species that was less beloved. Today, she produces three pieces each week for Atlas Obscura, often exploring the theme of human impact on nature.

She’s also learning on the job about the business of a media startup with investors and advertisers — broadening her skills in a way Mnookin says is key to succeeding as a journalist today.

“We emphasize students’ ability to work as independent operators, creating viable employment not through one but a handful of different employers,” he says. “We’d love it if they were entrepreneurial and started their own outlets.”
Tools and skills for viable careers

GPSW works hard to make a journalism career viable for its students, he notes. “We view finding ways to support our students financially as a moral issue.”

Beyond providing rigorous training, professional contacts, and placement opportunities, the program has been revamping its curriculum and bringing on faculty to teach data analysis, and skills for generating websites, podcasts, and videos — ensuring graduates have every tool they need for a successful career path.

This support has been critical for Hirji, who got assistance from GPSW to land an internship at ICN the summer after graduation. She began at ICN by “helping out with the website, social media, and business things.” Today, she reports news and contributes to investigative pieces, including articles on dangerous pollutants in fracking waste streams, and on the history of ExxonMobil’s company research on climate change.

“Reporting can change the world,” she says.

MyGoodness: Making charitable giving more effective

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: MIT News

It’s the holiday season, which to many people means a season of giving — to loved ones, colleagues, public radio and television, or to any number of the countless charities seeking support. Nearly a third of all annual charitable giving occurs in December, and many nonprofits raise as much as half of their annual funds from this year-end burst of giving.

With so many charities relying on these donations to achieve their goals, how do we choose between them? How do we know how much impact our dollars actually have?

Enter MyGoodness: an online game that aims to maximize the impact of charitable donations. Created by Iyad Rahwan and Edmond Awad of the MIT Media Lab’s Scalable Cooperation group, MyGoodness presents each player with a hypothetical $1,000 to spend on donations to various causes. Players are then faced with a series of 10 sets of choices between different charities, giving away $100 at each turn. By choosing between numbers and characteristics of people, geographic location, and types of aid, players are invited to better understand the effectiveness of their donation choices.

There are over 1 million registered charities in the United States alone, and many more worldwide. How do you choose among them?

Video: Scalable Cooperation group/MIT Media Lab

The MyGoodness team collaborated on the game with The Life You Can Save (TLYCS), a nonprofit organization founded by Peter Singer that identifies charities that deliver maximum impact. TLYCS helped with the design and advised the researchers on the magnitude of the different tradeoffs between charities. TLYCS is also helping MyGoodness back up its goals with real money: Two players will be randomly selected to receive $1,000 in real money to put toward their actual decisions in the game.

“We’re trying to promote a specific idea, which is that goodness is doing the best thing for the greatest number of people,” says Rawan, head of the Scalable Cooperation group. “This game is about life-saving charities, through different means: clean water, nutritious meals, medication, assault victim support. We take the position that saving the greatest number of lives is the right thing to do, regardless of where they are or how you’re saving them. Every life is the same and saving more lives is the ideal.”

MyGoodness takes players to some uncomfortable places, sharply underscoring certain biases and preferences. Like a charity-based trolley problem, the game asks us to choose, for example, between providing nutritious meals to 10 children in North America, or clean water to 25 people in northern Africa.

“Currently, only 6 percent of U.S. charitable donations go toward international causes, where you can get the most bang for your buck,” explains Charlie Besler, executive director of The Life You Can Save. “Meanwhile, every day, over 7,500 children die from preventable causes. We’re trying to get people to reconsider the notion that all donations should go to domestic causes, and to give in a thoughtful way.”

It’s easy to let our own experiences and biases dictate our decisions. It’s also easy to choose a charity that looks good, based on little or no information (only about 35 percent of people do any research before giving to a charity). MyGoodness seeks to promote a more objective, efficacy-based process, even if it means overcoming an impulse to favor one type of person over another.

“We want people to reflect on the values they use when they decide how to give to charity. The game presents different merits to them, they confront the discomfort that comes with choosing, and in the process learn something about themselves,” says Rahwan.  

By offering the real cash incentive in selecting two random players to receive $1,000 (one on Christmas, the other on New Year’s day), the team hopes MyGoodness will make people feel that they have a real stake in the game. This is doubly true since the game does offer the option to keep some money or give it to a relative, which means that if either of the two players who wins the real money has made those choices in the game, that’s what will happen.

But the MyGoodness team is confident that players will embrace the opportunity to reflect on effective giving, as well as choose more effectively.

 “We know that people are good. We want to help them be better,” Rahwan says.

MyGoodness can be played at mygoodness.mit.edu.

Romero, alumnus Fishman elected to American Law Institute

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: Princeton News


The American Law Institute (ALI) has elected 44 new members including Ramona Romero, general counsel of Princeton University, and Paul Fishman, Class of 1978, who is a distinguished visiting fellow at Seton Hall University School of Law.

Ramona Romero

The ALI, which is based in Philadelphia, was founded in 1923 and is the leading independent organization in the United States producing scholarly work to clarify, modernize and improve the law. The ALI drafts, discusses, revises and publishes Restatements of the Law, Model Codes, and Principles of Law that are enormously influential in the courts and legislatures, as well as in legal scholarship and education.

“I am deeply impressed by the variety and substance of the achievements of our new members,” said ALI President David Levi. “It is important that diversity of experience and perspective is reflected in the institute’s membership. We look forward to working with these wise and accomplished lawyers, judges and academics who are committed to the important work of the ALI.”

Romero joined Princeton in December 2014. A lawyer who has held senior positions in government and the private sector, she was general counsel of the U.S. Department of Agriculture before coming to Princeton.

Before joining the faculty of Seton Hall, Fishman served as the United States Attorney for the District of New Jersey. 

Election of these new members brings ALI’s number of elected members to 2,919.

MIT conference seeks solutions for reconstruction in devastated Caribbean

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: MIT News

This fall’s record-breaking hurricanes Maria and Irma left a swath of devastation across the Caribbean islands of Puerto Rico, Granada, Dominica, and others. Photos of severely damaged or demolished houses, and statistics about the scale of the destruction and the slow pace of recovery efforts, reveal a tragic level of suffering in an already economically ravaged region.

In a two-day conference at MIT on Dec. 12-13, leaders from the region brainstormed with researchers from MIT and elsewhere to develop strategies for not just rebuilding the islands’ ruined infrastructure, but making it better and more resilient to the ever-growing threat of powerful hurricanes. The conference was co-hosted by the MIT Energy Initiative and Environmental Solutions Initiative.

Ricardo Rosselló ’01, the governor of Puerto Rico and an MIT alumnus with a degree in chemical engineering, cast the terrible damage suffered by his and neighboring islands as “a once-in-a-lifetime opportunity” to rebuild in a way that would be significantly more resilient in the face of future natural disasters. That could include, he suggested, creating a less-centralized electric grid and building housing according to stronger codes for withstanding high winds and flooding.

Already, before the hurricanes struck, his administration had proposed a 15-year vision for a new, more resilient electrical grid. “Now, we can think about rebuilding it in three years, in a much bolder and more modern way,” he said, “and make sure we use this crisis as an opportunity” to achieve lasting improvements. “We may use this to make Puerto Rico a model for the Caribbean.” Similarly, he said, instead of just rebuilding the 10 schools that were destroyed, given that the school population has declined by half, they may build “three that are new and modern and resilient,” making better use of limited resources.

As an example of the innovative possibilities, he cited an ongoing dialog he has been having with Elon Musk, the CEO of Tesla Motors and SolarCity, who has offered to create a model solar-based power system for Puerto Rico. Rosselló says he has been in communication with Musk and others at Tesla, including several representatives of the company who have come to the island to work on a detailed proposal for a grid largely based on solar panels and battery storage systems.

In an interview with MIT News, Rosselló described his response to a tweet from Musk: “I sent a tweet out challenging him, saying ‘you want to show your model is scalable, and Puerto Rico offers you a platform to do it.’ And then the conversation started. I spoke to him a few times, and yesterday [Dec. 11] we just announced a public-private partnership model. We received an unsolicited proposal from Tesla, which includes at least the first phase, of 600 megawatts of generation using solar and batteries.” If the proposal gets accepted, then it will be opened up as a formal request for proposals to see if anyone else could match the offer. “We’re very excited about Tesla’s involvement,” he said.

At this point, he said, about 63 percent of Puerto Rico’s power grid has been brought back online, and 95 percent of residents now have access to potable water. Still, about half a million homes were severely damaged or destroyed, he said, so the rebuilding effort will go on for a very long time. And all of this has happened on an island that was already battered by what Rosselló called a “hurricane of the manmade kind,” namely the territory’s $70-plus billion debt.

Potentially making things even worse, he said, would be passage of the tax bill now before Congress, which he said would unfairly punish Puerto Rico with the burden of extra tariffs, at the worst possible time. “It is weird that we have to go to Congress and ask them to treat us the same as everyone else,” he said. “The tax reform act levies a severe tax on Puerto Rico, by treating us as a foreign country.”

The two-day conference also featured Keith Mitchell, the prime minister of Grenada, which was also battered by the back-to-back hurricanes. Mitchell also emphasized the importance of not just restoring but revamping the electrical systems. “Electricity is such a critical factor in reconstruction,” he said. “Without it, it’s going to be impossible to recover.” On the nearby island nation of Dominica, which he toured recently, he said “every electric pole is on the ground. It was one of the most painful scenes I’ve ever had to witness.”

He said that during the recent international climate conference in Paris, he was able to secure commitments for $4 billion in reconstruction aid, and billionaire entrepreneur Richard Branson has offered to help in mobilizing the private sector to provide more aid. But that is still far short of what the Caribbean region will need to rebuild, he said.

And, echoing Rosselló’s vision of the need for creating an improved electrical system, he said that “affordable clean energy provides the greatest potential for economic revitalization of the region.” It’s also vital, he said, because the global warming produced by greenhouse gas emissions poses “an existential threat for all Caribbean nations” due to the potential for extreme sea level rise and more powerful hurricanes.

In deciding on appropriate methods of reconstruction, “there is a tension, by default, in acting quickly while bearing in mind the long term,” said John Fernández, director of MIT’s Environmental Solutions Initiative. While there is great urgency in restoring the basic services of water, power, and roads that people depend on, he said, it’s also important at every step to ask: “How do you rebuild in a way such that what you end up with is better” than what was there before?

Overall, the conference was intended to be the first step in an ongoing process of involving MIT in the planning and execution of innovative reconstruction for the region, rather than simply aiming to rebuild things as they were, said Robert Stoner, director of MIT’s Tata Center for Technology and Design.

For example, it turns out that of the solar panels that did exist on the islands, home-based rooftop panels in general survived better than large solar installations. But even among the large arrays, some were completely destroyed, while others suffered relatively minor damage, so studying the details of what worked and what didn’t could provide important lessons for future construction. Similarly, studying which buildings stood up to the winds and which were flattened by them could lead to important changes in building codes to foster greater resilience.

The conference looked at three broad areas of reconstruction, and how to achieve improvements in each of them: the electrical system; settlements (not just individual buildings, but also the roads and delivery systems that make them function); and the water, sewage, and other key infrastructure systems needed for survival.

The next step of MIT’s participation in the rebuilding will include several teams of students who will be spending January’s Independent Activities Period in the region, assessing damage and working with local people to develop appropriate solutions. Then, through further meetings, the Institute will try to figure out how best to continue the efforts at working together to develop and implement innovative solutions, Stoner said. “We have an opportunity to use planning and computational tools that didn’t exist” when most of the region’s present structures were built, he said.

“I hope this can be the start of a great collaboration,” Rosselló said.

Analytical expression for LVRT of BDFIG with enhanced current control to CW and reactive power support from GSC

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: Science Direct


An enhanced CW current control is proposed to suppress current oscillation.
Analytical expressions of PW, CW, and rotor currents and CW voltage are proposed.
Improved LVRT effect and accuracy of the analytical expressions are validated.
Capacity of the GSC is utilized to improve the reactive power support capability.


During the low-voltage ride-through (LVRT) of the brushless doubly-fed induction generator (BDFIG), the oscillation of the power winding (PW) flux will induce high current in the control winding (CW), causing possible violation to the current constraint and weakening the power support capability of the machine-side converter (MSC). The existing PI control is designed based on the steady-state operation thus sensitive to the intense oscillation of the PW flux. To isolate the CW current control from the disturbances of the oscillating PW flux, the enhanced CW current control is newly proposed by introducing the change rates of the PW flux and the rotor flux to the inner-loop current control of the MSC as the feed-forward compensation terms. The analytical expressions of the PW current, the CW current, the rotor current, and the CW voltage are newly derived to quantify the LVRT effect of the enhanced control. With the DC-voltage constraint considered, the capacity of the grid-side converter (GSC) is newly utilized to improve the reactive power support capability. Dynamic simulation results show that the enhanced control reduces the oscillation of the CW current, the PW current and the rotor current. The accuracy of the analytical expression is validated by comparing it with the step-by-step simulation results. The selected references of the GSC current provide the additional reactive power support without violation to the constraint of the DC-voltage.


  • Brushless doubly-fed induction generator (BDFIG);
  • Enhanced CW current control;
  • Low-voltage ride-through (LVRT);
  • Analytical expression;
  • Reactive power support

Assessment of Salmonella spp. and Escherichia coli O157:H7 growth on lettuce exposed to isothermal and non-isothermal conditions

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: Science Direct


Salmonella grew on lettuce under isothermal and nonisothermal conditions (5-40 °C).
E. coli O157:H7 grew on lettuce under isothermal and nonisothermal storage (5-42 °C).
Negligible growth time parameter (ς) was proposed.
ς to keep lettuce without refrigeration is 1.3 h, considering these pathogens.
These pathogens do not grow expressively on lettuce for 80 h under refrigeration (5 °C).


This study aimed to assess the growth of Salmonella and Escherichia coli O157:H7 on lettuce exposed to isothermal and non-isothermal conditions. Pathogens were inoculated on lettuce separately and stored under isothermal condition at 5 °C, 10 °C, 25 °C, 37 °C for both bacteria, at 40 °C for Salmonella and 42 °C for E. coli O157:H7. Growth curves were built by fitting the data to the Baranyi’s DMFit, generating R2 values greater than 0.92 for primary models. Secondary models were fitted with Ratkowsky equations, generating R2 values higher than 0.91 and RMSE lower than 0.1. Experimental data showed that both bacteria could grow at all temperatures. Also, the growth of both pathogens under non-isothermal conditions was studied simulating temperatures found from harvest to supermarkets in Brazil. Models were analysed by R2, RMSE, bias factor (Bf) and accuracy factor (Af). Salmonella and E. coli O157:H7 were able to grow in this temperature profile and the models could predict the behavior of these microorganisms on lettuce under isothermal and non-isothermal conditions. Based on the results, a negligible growth time (ς) was proposed to provide the time which lettuce could be exposed to a specific temperature and do not present an expressive growth of bacteria. The ς was developed based on Baranyi’s primary model equation and on growth potential concept. ς is the value of lag phase added of the time necessary to population grow 0.5 log CFU/g. The ς of lettuce exposed to 37 °C was 1.3 h, while at 5 °C was 3.3 days.


  • Leafy greens;
  • Predictive modeling;
  • Negligible growth time (ς);
  • Temperature;
  • Vegetable;
  • Microbial pathogen

Multi-objective MILP model for distribution systems reliability optimization: A lightning protection system design approach

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: Science Direct


Explicit model for EPDS reliability and lightning phenomenon interdependency.
Multi-objective reliability problem is formulated through a goal programing model.
SAIFI and MAIFIE reliability indexes and associated costs are modeled considering LPS.
LPS solutions, area characteristics and overcurrent based protection are considered.


Lightning phenomenon is the main cause of power systems faults. These faults may cause momentary or permanent service interruptions, thus system reliability is inherently interdependent with lightning phenomenon. A literature review will show that state-of-the-art solutions have yet to present mathematical explicit models for the interdependency of such two phenomena. In this context, this paper presents a multi-objective mixed integer linear programing (MILP) model for distribution systems reliability optimization while considering lightning phenomenon interdependency. The presented multi-objective MILP model aims the simultaneous minimization of SAIFI and MAIFIE reliability indices and associated costs. These goals are achieved by optimizing the lightning protection system design, which includes selection and allocation of different types of grounding systems along distribution feeders, while considering simultaneously network characteristics. Validation is done using real-life 81 bus 23 kV distribution network data. Test results highlight the efficiency of the presented model in improving system reliability while reducing associated costs. The ease of implementation of design, formulation of parameters and encouraging test results indicate potential for real-life application. The multi-objective MILP model is currently used by a distribution utility as a reliability-oriented tool.


  • Distribution systems reliability;
  • Lightning protection system design;
  • Explicit mathematical models;
  • Multi-objective optimization;
  • Power quality

Spanning Disciplines in the Search for Life Beyond Earth

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: Astrobiology Magazine: Latest News

An illustration of Kepler-186f, the first Earth-size planet discovered within a star’s habitable zone. Scientists now know of thousands of exoplanets, but our knowledge is limited because we can’t yet view them directly. Credit: NASA Ames/SETI Institute/JPL-Caltech

The search for life beyond Earth is riding a surge of creativity and innovation. Following a gold rush of exoplanet discovery over the past two decades, it is time to tackle the next step: determining which of the known exoplanets are proper candidates for life.

Scientists from NASA and two universities presented new results dedicated to this task in fields spanning astrophysics, Earth science, heliophysics and planetary science — demonstrating how a cross-disciplinary approach is essential to finding life on other worlds — at the fall meeting of the American Geophysical Union on Dec. 13, 2017, in New Orleans, Louisiana.

“The potentially habitable real estate in the universe has greatly expanded,” said Giada Arney, an astrobiologist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. “We now know of thousands of exoplanets, but what we know about them is limited because we can’t yet see them directly.”

Currently, scientists mostly rely on indirect methods to identify and study exoplanets; such methods can tell them whether a planet is Earth-like or how close it is to its parent star. But this isn’t yet enough to say whether a planet is truly habitable, or suitable for life — for this, scientists must ultimately be able to observe exoplanets directly.

Direct-imaging instrument and mission designs are underway, but in the meantime, Arney explained, scientists are making progress with tools already at their disposal. They are building computational models to simulate what habitable planets might look like and how they would interact with their parent stars. To validate their models, they are looking to planets within our own solar system, as analogs for the exoplanets we may one day discover. This, of course, includes Earth itself — the planet we know best, and the only one we know of yet that is habitable.

“In our quest for life on other worlds, it is important for scientists to consider exoplanets from a holistic sense — that is, from the perspective of multiple disciplines,” Arney said. “We need these multi-disciplinary studies to examine exoplanets as the complex worlds shaped by multiple astrophysical, planetary and stellar processes, rather than just distant points in the sky.”

Studying Earth as an Exoplanet

When humans start collecting the first direct images of exoplanets, even the closest image will appear as a handful of pixels. What can we learn about planetary life from just a smattering of pixels?

Stephen Kane, an exoplanets expert at the University of California, Riverside, has come up with one way to answer that question using NASA’s Earth Polychromatic Imaging Camera aboard the National Oceanic and Atmospheric Administration’s Deep Space Climate Observatory, or DSCOVR. Kane explained that he and his colleagues take DSCOVR’s high-resolution images — typically used to document Earth’s global weather patterns and other climate-related events — and degrade them down to images just a few pixels in size. Kane runs the DSCOVR images through a noise filter that attempts to simulate the interference expected from an exoplanet mission.

“From just a handful of pixels, we try to extract as much information that we know about Earth as we can,” Kane said. “If we can do it accurately for Earth, we can do this for planets around other stars.”

Left, an image of Earth from the DSCOVR-EPIC camera. Right, the same image degraded to a resolution of 3-by-3 pixels, similar to what researchers will see in future exoplanet observations. Credits: NOAA/NASA/DSCOVR

DSCOVR takes a picture every half hour and it’s been in orbit for two years. Its more than 30,000 images are by far the longest continuous record of full-disk observations from space in existence. By observing how the brightness of Earth changes when mostly land is in view compared with mostly water, Kane has been able to reverse-engineer Earth’s albedo, obliquity, rotation rate and even seasonal variation — something that has yet to be measured directly for exoplanets — all of which could potentially influence a planet’s ability to support life.

Searching for Other Venuses

Much the way scientists use Earth as a case-study for habitable planets, they also use planets within the solar system — and therefore planets they are more familiar with — as studies for what makes planets uninhabitable.

Kane also studies Earth’s sister planet, Venus, where the surface is 850 degrees Fahrenheit and the atmosphere — filled with sulfuric acid — bogs down on the surface with 90 times the pressure of Earth’s. Since Earth and Venus are so close in size and yet so different in terms of their prospects for habitability, he is interested in developing methods for distinguishing Earth- and Venus-analogs in other planetary systems, as a way of identifying potentially habitable terrestrial planets.

Kane explained that he works to identify Venus analogs in data from NASA’s Kepler by defining the “Venus Zone,” where planetary insolation — how much light a given planet receives from its host star — plays a key role in atmospheric erosion and greenhouse gas cycles.

“The fate of Earth and Venus and their atmospheres are tied to each other,” Kane said. “By searching for similar planets, we are trying to understand their evolution, and ultimately how often developing planets end up a Venus-like hellscape.”

Since Earth, right, and Venus, left, are so close in size and yet so different in terms of their prospects for habitability, Stephen Kane, an exoplanets expert at the University of California, Riverside, is interested in developing methods for distinguishing Earth- and Venus-analogs in other planetary systems, as a way of identifying potentially habitable terrestrial planets. Credits: NASA/JPL-Caltech/Ames

Modeling StarPlanet Interactions

While Kane talked about planets, Goddard space scientist Katherine Garcia-Sage focused on the way planets interact with their host star. Scientists must also consider how the qualities of a host star and a planet’s electromagnetic environment — which can shield it from harsh stellar radiation — either hinder or help habitability. Earth’s magnetic field, for example, protects the atmosphere from the harsh solar wind, the Sun’s constant outpouring of charged solar material, which can strip away atmospheric gases in a process called ionospheric escape.

Garcia-Sage described research on Proxima b, an exoplanet that is four light-years away and known to exist within the habitable zone of its red dwarf star, Proxima Centauri. But just because it’s in the habitable zone — the right distance from a star where water could pool on a planet’s surface — doesn’t necessarily mean it’s habitable.

While scientists can’t yet tell whether Proxima b is magnetized, they can use computational models to simulate how well an Earth-like magnetic field would protect its atmosphere at the exoplanet’s close orbit to Proxima Centauri, which frequently produces violent stellar storms. The effects of such storms on a given planet’s space environment are collectively known as space weather.

“We need to understand a planet’s space weather environment to understand whether a planet is habitable,” Garcia-Sage said. “If the star is too active, it can endanger an atmosphere, which is necessary for providing liquid water. But there’s a fine line: There is some indication that radiation from a star can produce building blocks for life.”

A red dwarf star — one of the most common types of stars in our galaxy — like Proxima Centauri strips away atmosphere when extreme ultraviolet radiation ionizes atmospheric gases, producing a swath of electrically charged particles that can stream out into space along magnetic field lines.

In this illustration, extreme ultraviolet light from an active red dwarf star cause ions to escape from an exoplanet’s atmosphere. Credits: NASA’s Goddard Space Flight Center

The scientists calculated how much radiation Proxima Centauri produces on average, based on observations from NASA’s Chandra X-ray Observatory. At Proxima b’s orbit, the scientists found their Earth-like planet encountered bouts of extreme ultraviolet radiation hundreds of times greater than Earth does from the Sun.

Garcia-Sage and her colleagues designed a computer model to study whether an Earth-like planet — with Earth’s atmosphere, magnetic field and gravity — in Proxima b’s orbit could hold on to its atmosphere. They examined three factors that drive ionospheric escape: stellar radiation, temperature of the neutral atmosphere, and size of the polar cap, the region over which the escape happens.

The scientists show that with the extreme conditions likely to exist at Proxima b, the planet could lose an amount equivalent to the entirety of Earth’s atmosphere in 100 million years — just a fraction of Proxima b’s 4 billion years thus far. Even in the best-case scenario, that much mass escapes over 2 billion years, well within the planet’s lifetime.

Mars, a Laboratory for Studying Exoplanets

While Garcia-Sage spoke of magnetized planets, David Brain, planetary scientist at the University of Colorado, Boulder, spoke of Mars — a planet without a magnetic field.

“Mars is a great laboratory for thinking about exoplanets,” Brain said. “We can use Mars to help constrain our thinking about a variety of rocky exoplanets where we don’t have observations yet.”

Brain’s research uses observations from NASA’s Mars Atmosphere and Volatile Evolution, or MAVEN, mission to ask the question: How would Mars have evolved if it were orbiting a different kind of star? The answer provides information for how rocky planets — not unlike our own — could develop differently in different situations.

It is thought that Mars once carried water and an atmosphere that might have made it hospitable to Earth-like life. But Mars lost much of its atmosphere over time through a variety of chemical and physical processes — MAVEN has observed similar atmospheric loss on the planet since its launch in late 2013.

Brain, a MAVEN co-investigator, and his colleagues applied MAVEN’s insights to a hypothetical simulation of a Mars-like planet orbiting an M-class star — commonly known as a red dwarf star. In this imaginary situation, the planet would receive about five to 10 times more ultraviolet radiation than the real Mars does, which in turn speeds up atmospheric escape to much higher rates. Their calculations indicate that the planet’s atmosphere could lose three to five times as many charged particles and about five to 10 times more neutral particles.

Such a rate of atmospheric loss suggests that orbiting at the edge of the habitable zone of a quiet M-class star, instead of our Sun, could shorten the habitable period for the planet by a factor of about five to 20.

To receive the same amount of starlight as Mars receives from our Sun, a planet orbiting an M-type red dwarf would have to be positioned much closer to its star than Mercury is to the Sun. Credits: NASA’s Goddard Space Flight Center

“But I wouldn’t give up hope for rocky planets orbiting M dwarfs,” Brain said. “We picked a worst-case scenario. Mars is a small planet, and lacks a magnetic field so solar wind can more effectively strip away its atmosphere. We also picked a Mars that isn’t geologically active, so there’s no internal source of atmosphere. If you changed any one factor, such a planet might be a happier place.”

Each one of these studies contributes just one piece to a much larger puzzle — to determine what characteristics we should look for, and need to recognize, in the search for a planet that might support life. Together, such interdisciplinary research lays the groundwork to ensure that, as new missions to observe exoplanets more clearly are developed, we’ll be ready to determine if they might just host life.

Young classical music fans show their support for KUSC

This NEWS was origynally shared on Sutesuaem Universities News

Fuente: University of Southern California

Alan Chapman, right, called Owen Dupuy KUSC’s “biggest 13-year-old fan” after he motivated his parents to contribute to the pledge drive of his favorite station. (USC Photo/Eric Lindberg)
For as long as he can remember, KUSC has been a big part of Owen Dupuy’s life — almost all 13 years of it.

The station’s classical music often plays in the background as the Irvine teenager does his homework, eats dinner with his family or drifts off to sleep. So when he heard some of his favorite KUSC announcers, like Alan Chapman and Jim Svejda, asking for pledges from listeners, he knew he had to act.

“It’s important to keep this type of great music on the air, so during the membership drives, they need our support,” he said. “Remember, the station gets about 75 percent of its total operating budget from people like me.”

He pestered his parents to contribute. “I think he must have asked us for two days straight,” his mother, Sue Dupuy, added. “He finally said, ‘Mom, this is really the last day, we have to do it now.’”

The young teen dipped into his allowance and gave $20, although he is quick to point out that he waited until a matching challenge to ensure that his support was doubled.

Dupuy’s encyclopedic knowledge of all things KUSC — he rattles off the titles and air times of various shows without a second thought — bowled over employees during his recent tour of the station. It prompted Chapman to proclaim him KUSC’s “biggest 13-year-old fan.”

But he isn’t the only youngster who has been inspired to donate to the radio station. During every membership drive, dozens of pledges come in from children who want to make a contribution. It’s an encouraging sign for station leaders, who hope to build a new generation of listeners who appreciate classical music.

Striking a chord

“When we hear those kinds of stories, we’re really excited,” said Minnie Prince, KUSC’s executive director of development. “It’s helping introduce kids to classical music.”

Gail Eichenthal, a longtime on-air announcer and KUSC’s chief engagement officer, said that children’s support gives the KUSC staff a lift.

Not only are they listening — which in itself is a thrill — but they feel a connection to the station and want it to succeed.

Gail Eichenthal

“Not only are they listening — which in itself is a thrill — but they feel a connection to the station and want it to succeed.”

In recent years, the station has made a concerted effort to build up its engagement efforts with children and local communities, including initiatives like collecting lightly used instruments from listeners to donate to public school and afterschool music programs in need.

A recent event called KUSC Kids Discovery Day brought thousands of children to the Natural History Museum of Los Angeles County for live performances by artists from LA Opera and the USC Thornton School of Music, interactive musical games and ukulele lessons. In addition to planning a return to the museum in April 2018 for a similar event, KUSC is holding “playground popup” concerts — bringing live shows to local public elementary schools.

“We definitely want to spark some excitement about live performance, and perhaps an interest in playing music themselves,” Eichenthal said. “If you haven’t had any access to classical music, it can be foreign and scary and intimidating. We really want to try to knock down those walls.”

All the right notes

One young fan who doesn’t need any encouragement when it comes to classical music is Benjamin Roberts. Before leaving the driveway with his dad in Calabasas to head to school, the 5-year-old has the opportunity to pick a radio station, and more often than not, he flips the dial to 91.5 FM.

Benjamin Roberts

Five year-old Benjamin Roberts knows many composers and pieces upon hearing them on KUSC. (USC Photo/Eric Lindberg)

On one occasion, his father had to take a call while on the road, and when he hung up, Benjamin exclaimed that the station had played a piece by Tchaikovsky. His passion for the genre became apparent as he showed off a book featuring 12 top composers and recited their full names, even though the cover only lists their surnames.

“The more classical music I’ve heard, the more interesting it sounds,” he said. “Some of it is kind of wild and crazy and gets me really excited, and some of it is really calm.”

It’s thrilling for Matt Roberts, Benjamin’s father, to listen to his son describe his favorite classical pieces — Mozart’s Symphony No. 41 and Beethoven’s Für Elise. His own father often listened to KUSC or classical music CDs on the drive to school when he was a boy, so it feels like he is continuing a family tradition.

“It’s a beautiful thing to pass this on to my son like my dad passed it on to me,” he said. “What’s also great about this whole experience is that it was never forced on him. It was just sort of organic, and he gravitated toward it quite naturally.”

The Roberts family had a recent opportunity to tour the KUSC studios, and Chapman even had Benjamin record a short message to play during an upcoming pledge drive. The recording ended up on the air a few weeks later, prompting calls from friends and family who happened to hear a familiar voice encouraging listeners to support the station.

Chapman also had Owen Dupuy try out the microphone and headphones during his visit, and the 13-year-old was a natural. He quickly launched into a story about how his family first started listening to the station to lull his older brother to sleep when he was a baby. Sue Dupuy and her husband, Roger, had tried everything to calm down their wailing infant, but nothing worked.

“My dad thought for a moment, then flipped a switch,” Owen said. “It was some German opera on KUSC, and that’s what finally made him calm down and go to sleep.”

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