الأحد، 31 مايو 2020
Show HN: Videos for Kids Science Experiments Without Long Preparations https://ift.tt/3gFZFiC
Show HN: Interactive Speech Anatomy Visualization and Universal Phonetic Script https://ift.tt/3ckq1Dl
Show HN: Citizen Police Data Project – Police allegation data made accessible https://ift.tt/3eAZovp
Show HN: Fast Raster to Vector Converter https://ift.tt/2BloO1V
Show HN: ImageCart – Low cost unlimited public and private Docker repositories https://ift.tt/3gEU4cm
Show HN: k3sup ('ketchup') – bootstrap Kubernetes with k3s over SSH https://ift.tt/3gFoWcJ
Show HN: Automatic cleanup in C using with-statements https://ift.tt/2XLugCF
Show HN: Print a WiFi Login Card https://ift.tt/3dqv9aA
Show HN: Unity MMORPG Boilerplate – Multiplayer in Unity Made Easy https://ift.tt/3gGr8R2
Show HN: Practise algorithms whenever you open a new Tab in Chrome (AlgoTab) https://ift.tt/3eBB0dg
Show HN: Colors and Fonts Extractor – a simple Firefox extension https://ift.tt/2Mhds16
Show HN: OmSave – Safari Extension for OmniFocus on macOS https://ift.tt/2Bbmnia
Show HN: Go Micro – A distributed systems development framework https://ift.tt/2Bj2LsE
Show HN: I made a simple tool to preview Google/local fonts on live websites https://ift.tt/2TYm0hI
Show HN: Taski – Make better decisions every time https://ift.tt/2BlVvfL
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السبت، 30 مايو 2020
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Show HN: Shooting pose analysis and basketball shot detection https://ift.tt/2MkmxpH
Show HN: I made a simple PDF text editor https://ift.tt/2McZNrE
Show HN: A community for sharing healthy lifestyle goals https://ift.tt/2AmmXcz
Show HN: Write a bot that plays SpaceX's ISS docking simulation https://ift.tt/2TRI79e
Show HN: I used Java to build a side project https://ift.tt/36I7xLZ
Show HN: NPM module that makes easy to convert JSON to CSV https://ift.tt/2ZRD38F
Show HN: Tinder, but for Movies https://ift.tt/3dhUKSZ
Show HN: I build djit.su during the coronavirus lockdowns – a new code editor https://ift.tt/3cfLZHK
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Show HN: Top 10 Newest HackerNews Stories (Phoenix/LiveView) https://ift.tt/3ciyEy4
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Show HN: List of all (427) startups that got funded last month https://ift.tt/3cf2SCo
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Show HN: Implementation of Simple File-System Based on Inode from Scratch https://ift.tt/3cjOvwq
الجمعة، 29 مايو 2020
Show HN: Deploying Pytorch models on iOS via Core ML – my “pandemic project” https://ift.tt/3chNyEQ
Show HN: Awesomeblog.club – self-hostable directory for small blogs and links https://ift.tt/3eAdKMO
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Show HN: MongoDB analytics to track changes in your site's performance https://ift.tt/36EnEKi
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الخميس، 28 مايو 2020
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الأربعاء، 27 مايو 2020
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الثلاثاء، 26 مايو 2020
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Show HN: Understanding Shape Detection Using Hough Transform with Python https://ift.tt/2THUi8H
A Data-Driven Transportation Recovery
By Bradley Dunn
Responding to the Covid-19 public health crisis has radically changed our transportation system. No one wants a disaster to put lives at risk and disrupt everyday life. Data is guiding the SFMTA, not just during our reaction to the crisis, but how we will thoughtfully recover.
Transit’s Recovery
When shelter-in-place began and the SFMTA was forced to reduce Muni service, we identified how to focus our service reductions using data. Our Muni Core Service Plan prioritized our available resources based on locations of medical facilities, Muni’s Equity Strategy and data from shifting customer travel patterns observed during the first weeks of the COVID-19 shelter-in-place order. Our service plan kept all of San Francisco within one mile of an active Muni stop. As additional resources have become available, guided by the same data as well as additional information from our operators, riders, and city leaders, we have increased frequency and returned some additional routes to service.
As more people return to working in retail and manufacturing, there will be an increased demand for transit, even as physical distancing still limits Muni’s capacity. If we cannot get the thousands of employees who rely on Muni to work, San Francisco cannot recover economically.
Preventing crowding and everyone wearing masks is key to our recovery. Generally, as the activities allowed by the public health order expand, we are keeping the core service routes and increasing capacity and frequency. The increased frequency helps limit crowding and promote physical distancing.
As congestion increases with more movement, we also need to use data to help us identify solutions that keep our buses from being stuck in traffic. With fewer cars on the road, San Francisco’s shelter-in-place simulates the street conditions across the city that are normally seen only on routes with transit lanes. On average, peak Muni travel times have been reduced by about 15% across the Core Service network during the shelter-in-place period. These time savings will inform how we can use transit priority improvements, like transit-only lanes, as we expand Muni service in a way that better serves our customers and supports economic recovery.
When our buses are stuck in traffic, it decreases the frequency that buses pick people up at stops. With less frequent pickups, more people gather at stops making it harder to move all the people that need to board our buses while maintaining physical distancing. When buses complete their trips faster, they can return to service more quickly to reduce crowding and support distancing. Deploying transit-only lanes could also enable Muni to reduce customer’s travel times and help reduce agency costs in the face of lost revenue and budget cuts.
Data-driving dedicated space for biking
With Muni being reserved for essential trips only, walking and bicycling have become more important than ever during this pandemic. Streets that are calm and welcoming support newer bike riders, helping to reduce demand for Muni trips. We are using public feedback and pre-existing data to implement our Slow Streets traffic calming program and support walking and biking opportunities.
SFMTA staff gathered suggestions from conversations with members of the Board of Supervisors and community groups about locations for Slow Streets. They analyzed these inputs along with the 1,800 responses to our on-line, multilingual survey to identify the most frequently identified corridors. Streets were then screened for topography, surrounding land use, conflicts with Muni service, primary public safety routes and commercial loading zones.
When fully implemented, there may be over 34 miles of Slow Streets in San Francisco. We will analyze the effectiveness of the program by tracking the mode share of people driving, walking or biking on the street changes before and after implementation. Staff are also tracking side streets to see if there is substantial diversion of traffic.
As we move forward towards recovery, we expect bicycling to continue to serve trips that would otherwise be made on Muni or create traffic congestion in a private automobile. Our bicycle trip counters in some locations like the Panhandle path have shown massive increases. To be responsive and help provide more space for safer more comfortable riding, we are planning to add a protected bike lane on Fell Street. We will continue improving San Francisco streets through the data-informed approach to Vision Zero , build-out previously approved protected bike lanes and expand bike-share to provide access in more neighborhoods.
These are truly challenging times and the needs of San Franciscans are changing. We do not know everything that the future will bring but efficiently moving people around our city will always be a top priority. To do that, we must utilize data to adapt our transportation system to this crisis as well as use transportation as a tool to spur our city’s recovery.
Published May 27, 2020 at 12:47AM
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الاثنين، 25 مايو 2020
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الأحد، 24 مايو 2020
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السبت، 23 مايو 2020
Show HN: I made a self-improvement app to help you become better than yesterday https://ift.tt/2ZvJRZF
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الجمعة، 22 مايو 2020
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Celebrating the life and legacy of Harvey Milk
By Sophia Scherr
Today we celebrate and remember the life of San Francisco LGBTQ+ advocate and icon, Harvey Milk. One of our city’s most revered politicians, Milk's legacy as the first openly gay San Francisco supervisor and elected official in California helped in breaking down discriminatory barriers and usher LGBTQ+ politicians in government positions. Milk also advocated for equitable transportation, as he rode Muni exclusively since he did not own a car. He was a firm believer that affordable mobility was important in creating a thriving and livable city.
Below is Harvey Milk with Curtis E. Green, General Manager of the Municipal Railway promoting Muni’s “Fast Pass”. Mr. Green was a barrier-breaking figure in his own right, by becoming the first African American appointed to Muni's top position from his beginnings with the Agency as a bus operator. With his 1974 appointment, Green also became the first African American to serve as top executive for a major city transportation agency nationwide.
As we commemorate the 40th Anniversary of Muni Metro, Castro Station and Harvey Milk Plaza, we’re excited to bring improvements to the plaza as part of the Castro Station Accessibility Improvement Project. These much-needed improvements include a new glass elevator in compliance with the Americans with Disabilities Act (ADA) and an additional second elevator will be added to provide continuous access to the station.
We take a moment to recognize and thank trailblazers like Harvey Milk and others - who fought against systematic oppression, discrimination and bigotry. Let’s take inspiration from Milk and others to continue this hard and important work. We can all be changemakers and make San Francisco and the communities we all live in more inclusive.
Published May 22, 2020 at 06:27PM
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الخميس، 21 مايو 2020
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With Memorial Day Around the Corner Muni is Still for Essential Trips
By Erin McMillan
With Memorial Day weekend right around the corner, many of us are eager to get outside and enjoy the sunshine and wide open spaces. But as we enter the biggest holiday weekend since the shelter-in-place order, it’s still important to be acutely aware of how our individual actions can and will affect our communal ability to address the impacts of COVID-19.
While we hopefully will arrive at a new normal soon, the shelter-in-place order is still in effect and it’s still important as ever that we remember to physically distance ourselves while out in our neighborhoods and to only make essential trips.
In early April, we temporarily reduced Muni service to our Core Service network which serves the highest ridership lines and supports essential trips to places like hospitals, healthcare facilities, grocery stores, restaurants and other essential services. Thanks to increasing staffing availability, we were able to increase service over the past few weeks. We did this using ridership data and customer feedback. We are now providing as much as our resources allow, while providing adequate physical distance for customers and operators.
While we start to see slow changes that move us toward the lifting of the shelter-in-place order, it’s important to remember that Muni service is still only supporting essential trips that cannot be made in other ways. We are asking all San Franciscans to help us maintain adequate space on buses for physical distancing by staying at home except for essential trips. When essential trips are necessary, walking, biking, taking taxis or driving instead saves a seat on Muni for those that don’t have other options. These customers are largely hospital workers, social service providers, grocery store workers and other essential workers. Any time you take another mode of transportation for your essential trip, you save a seat for those who rely on Muni.
Muni still serves approximately 100,000 passengers a day – getting nurses, cooks, custodians, and other essential workers to their jobs. We continue to ask for San Franciscans’ help by a) complying with the shelter-in-place directive, b) only making essential trips, and c) using alternatives to Muni for essential trips whenever possible.
To encourage customers to give each other space on and off Muni, you may see ambassadors asking customers to wait for the next bus if there isn’t enough space for adequate physical distancing. Operators have been instructed that they may also skip stops if the bus is already more than half full to maintain appropriate physical distancing onboard. In addition to supporting physical distancing, you may also see ambassadors reminding customers that wearing a face covering is now required on Muni as well.
While it continues to feel odd to discourage San Franciscans from riding Muni if you have an alternate option, we’re starting to see the light at the end of the tunnel that will lead so many of us back to the bus. So, let’s stay on track and save those Muni seats for the folks who need it most right now.
Published May 22, 2020 at 02:36AM
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Moving San Francisco Forward
By Jeffrey Tumlin
Your city transportation leaders are focused on caring for this city while we fight the coronavirus pandemic. And, we’re also busy strategizing on what comes next. The city needs to be able to move in order to function.
San Francisco must take this moment to rebuild our transportation system purposefully and facilitate a resilient recovery. The SFMTA has been working with city leaders and public health officials to devise how best to do that in our new fiscal and public health reality.
The SFMTA is developing a Transportation Recovery Plan which includes a series of levels that coincide with future allowances of economic activity by state guidance and our local public health officials. For each level, there are associated service and operational strategies. We will expand Muni service intentionally to address past problems, like subway crowding. Our plans actively respond to ridership data and community input and feedback. This is a data-driven plan to help not only us, but the city, succeed in our shared efforts.
For the first couple levels, the Transportation Recovery Plan maintains the current Core Service routes with increased capacity and frequency. We have seen significant travel time savings due to reduced congestion during this public health emergency, which also equates to lower costs, as compared to buses sitting in traffic. We’ll be looking to expand our network of transit lanes to preserve these gains and protect riders from feeling the effects of budget cuts due to the economic impacts of the COVID-19 crisis.
Making the streets safer to accommodate walking and biking as we emerge from Shelter-in-Place is pivotal to limiting a potential surge in traffic congestion. Our Slow Streets program, implemented during the shelter-in-place order, will continue as part of our recovery-- giving people more space to walk and bike for essential trips with appropriate physical distancing. Expanding Slow Streets supports more people walking and biking instead of driving or taking Muni. Additionally, we are investigating low-cost, reversible street treatments known as Quick Build to add bike lanes and safety improvements to certain streets that connect bicyclists to businesses.
One part of the plan I am personally committed to is ensuring that the SFMTA supports local business recovery. We are closely following the work of the Economic Recovery Task Force and are ready to offer solutions – this could mean things like providing street or curb space to requesting businesses where possible. These, among other services delivered by the SFMTA, will roll out in coordination with the broader work of our city partners.
Above all, the health and security of our employees will always be at the forefront of our plan. Safeguarding our employees is both the right thing to do and fundamental to our ability to serve the public. We are proud we have been able to maintain some of the lowest rates of COVID-19 cases among major American transit agencies. This is not by luck or happenstance. From increasing vehicle cleanings to an early and on-going procurement of protective equipment for frontline staff, we have been proactive about employee health, which in turn promotes community health.
While Muni ridership has hit unprecedented lows over the last few months, we’re grateful to those who’ve stayed home to slow the spread of COVID-19 or taken non-Muni trips to allow those who had no other option to get to essential jobs and services. As more businesses re-open and more services become available, it is critical that the SFMTA support the city’s new normal. We also need to bear in mind the limited resources of the agency and unique needs of mitigating risk in an environment with an invisible virus.
San Franciscans have historically adapted to change very well, and the residents of our city have always been on the forefront of not only accepting but advocating for positive and meaningful change. If we are going to bring back our transportation system better than it was before COVID, we are going to have to engage in some discussions about trade-offs. For example, with reduced revenue, do we provide less service or do we provide service more efficiently by strategically dedicating road space to transit?
We are incredibly thankful to all San Franciscans for your resiliency and your contributions to flattening the curve thus far. The SFMTA will continue to be here to support you in ways that will feel familiar, but also in new ways that may feel a little different as we operate in a new era. We would be remiss without thanking Mayor London Breed for her leadership during this time. Members of the Board of Supervisors and other stakeholders have provided valuable partnerships. We are also incredibly grateful for our congressional delegation, which advocated for relief funding that has helped us avoid layoffs and continue service during the pandemic.
With continued support from regional leaders and continued patience from San Franciscans, we will emerge from this stronger and more resilient.
Published May 20, 2020 at 12:22AM
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Reimagine Potrero Yard with Us – Spring 2020 Update
By Adrienne Heim
During this difficult time, we must do everything we can to maintain our health and wellness. In response to COVID-19, many of our city services have been temporarily transformed, but despite this pandemic, it’s important that we continue to invest in our infrastructure to keep current and future generations moving throughout San Francisco. Potrero Yard, one of Muni’s oldest bus yards, is indeed an essential project that will continue to move forward.
Improvements proposed through the Potrero Yard Modernization Project offer solutions to ensure we maintain our fleet of buses as efficiently as possible, accommodate our new buses that will be delivered in the next six years, enhance our resilience to climate change and natural disasters, and ensure our staff is able to perform their work in a safe and efficient way.
Potrero Yard Today
Potrero Yard operates 24 hours a day, 7 days a week, to support six Muni routes (5 Fulton, 5R Fulton Rapid, 6 Haight/Parnassus, 14 Mission, 22 Fillmore, and 30 Stockton) that carry 14% of Muni’s total ridership per day.
Due to the building’s age and changes in bus fleet technology, major improvements are needed to ensure we continue operating this facility for the next 100+ years.
The Project Concept
Last October, we hosted an Open House to present the draft project concept and hear your feedback. Over an 18-month period of community engagement, a draft project concept was developed for a new Potrero Yard that serves the community, supports our workforce, and reflects the values of the neighborhood.
The modern yard will be able to store 213 buses, increasing capacity by approximately 50%.
In addition, the facility will include the following features:
- LEED Gold Certification
- Built to an elevated structural and seismic standard
- Infrastructure for battery-electric buses
- Centralized location for Street Operations - Muni’s “first responders”
- Centralized, modern space for Muni operator training
- Ground floor active uses on Bryant and possibly 17th streets
Housing on Top of the Yard
We partnered with other City departments (SF Planning Department, Public Works, Mayor’s Office of Housing and Community Development, and Office of Economic and Workforce Development) to explore how the land can be used to accommodate housing above Potrero Yard. Guided by input from the community, the SFMTA has concluded that housing is a feasible, compatible use on the site.
The SFMTA is proposing a range of 525 to 575 housing units with a goal that 50% of the total units are affordable. Many factors informed the proposed project’s size and unit count, such as building height, massing, financial feasibility, and shadow considerations.
Where we Are Now
The environmental review process is underway, and we are developing a Request for Qualifications (RFQ) for a joint development partner to design and build the project. We are also introducing legislation to the Board of Supervisors that will enable the SFMTA to deliver the project following a continued public process and environmental review and approval process.
Since November 2019, we have been working with the Planning Department on the environmental review process (CEQA) that will analyze potential environmental impacts and identify strategies for mitigating those impacts.
At the same time, we are working on the RFQ and RFP to procure a joint development partner to finance and build the project. The RFQ process will evaluate the qualifications of proposed project teams and determine the top three responders based on an evaluation of their relevant experience and qualifications. Those top three responders would then be invited to submit a full proposal through a subsequent RFP process. We hope to release the initial RFQ in early June to develop the shortlist of qualified firms. We will then issue an RFP to shortlisted firms in late summer.
Join the Conversation
We recently sent out a spring 2020 update brochure through the mail and email to residents who live near Potrero Yard, Muni employees, and community stakeholders who are generally interested in the project.
Participate in virtual conversations and telephone events:
Saturday, June 6, 11 AM to noon (English), Call 877-229-8493 and enter 119593#
Saturday, June 6, 1 PM to 2 PM (Spanish), Call +1-669-900-6833 and enter 81568997301#
We hope you can join us!
You can also provide input by participating in a phone-based survey by texting “Potrero” to (415) 599-8662 in English or “Potrero” to (415) 707-5406 in Spanish
Learn more about the project and subscribe to project updates by visiting www.sfmta.com/PotreroYard.
Also visit Talking Headways Podcast: Housing on the Bus Yard to hear the project team discuss the project.
For more information, please email PotreroYard@sfmta.com or call us at 415.646.2223.
Published May 19, 2020 at 06:16PM
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The Next Phase of Slow Streets
By
Due to the COVID-19 health crisis, the way we get around and where we are going are changing. Many San Francisco residents need to walk and take other modes of transportation for their essential trips. However, sometimes it is difficult to maintain the six feet of social distance on many sidewalks. Because of this, many pedestrians are choosing to walk in the street, exposing themselves to swiftly moving vehicle traffic. Our Slow Streets program aims to limit through traffic on certain residential streets and allows them to be used more as a shared space for foot and bicycle traffic.
At the start of the program, we released a survey and have happily received over 1,300 Slow Streets suggestions from San Franciscans. We heard broad support of the program from many residents and businesses, and we are pleased to announce the following future Slow Streets corridors, many generated by you:
- 20th Street, from Valencia to Potrero
- 23rd Avenue, from Lake to Cabrillo
- Chenery, from Elk to Brompton
- Excelsior, from London to Prague
- Golden Gate Avenue, from Masonic to Divisadero
- Jarboe, from Moultrie to Peralta
- Lane, from 3rd Street to Oakdale
- Lombard, from Jones to Stockton
- Mariposa, from Kansas to Texas
- Sanchez, from 23rd to 30th
- Shotwell, from 14th Street to Cesar Chavez
- Somerset, from Silver to Woolsey
- Stockton, from Bay to Lombard
SFMTA’s implemented (red) and proposed (blue) Slow Streets corridors.
The first four Slow Streets corridors we implemented (41st Avenue, Kirkham, Lake, and Page) total 11 lane miles, and the remaining first phase of planned Slow Streets total 9 lane miles. These thirteen new corridors add another 14 lane miles of streets prioritized for walking and biking, for a complete Slow Streets network of 34 lane miles.
Slow Streets are one element of the city’s efforts to provide physical distancing as people make essential trips. They create more space for those traveling on foot or by bicycle while still making sure people who live on the streets, and emergency vehicles have full access. Signage restricts through vehicle traffic, and SFMTA has worked with navigation map providers to re-route through traffic through these corridors on their apps.
How were these streets selected?
SFMTA staff gathered the most frequently suggested corridors. Streets were initially screened for conflicts with Muni service, primary public safety routes, and commercial loading zones. Additional screening criteria included intersection geometry and sight distances, topography, surrounding land use, connections to the bicycle network and open space network, and reductions in Muni service.
The most requested Slow Streets corridors include Sanchez Street and Shotwell Street in the Mission, Chenery Street in Glen Park, and Golden Gate Avenue in Western Addition. We also solicited corridor suggestions from community-based organizations and District Supervisors’ offices and included recommendations from previous community planning efforts.
Due to the multiple uses of our roadways, not all streets are good candidates for Slow Streets. For example, Jefferson and Grant streets are locations with high commercial delivery needs and complex emergency vehicle access needs. We are working with adjacent stakeholders and other City departments to create a detailed plan that allows for increased pedestrian access, business recovery, and complex access needs during the current public health crisis.
What is the Tenderloin Neighborhood Safety Assessment and Plan?
We heard a lot of interest in adding more Slow Streets to the Tenderloin area. At the same time, last week Mayor Breed announced the release of the Tenderloin Neighborhood Safety Assessment and Plan for COVID-19 -- a comprehensive report of the current conditions in the Tenderloin and a block-by-block plan for addressing those challenges.
The Tenderloin Plan is part of the City’s broader efforts to address the public health crisis in San Francisco and among people who are experiencing homelessness. We noted the area on the map above and will support other departments in our capacity, including adding things like Slow Streets where appropriate.
What is next?
We are currently working to schedule the implementation of the additional Slow Streets corridors with the input from neighborhoods, community groups, and elected officials. SFMTA is balancing the need for Slow Streets in each district and will share regular updates on our progress and plans.
Please remember to use Slow Streets for essential trips. They are not neighborhood gathering points. We also encourage everyone to bring a face covering and maintain proper physical distance from people outside their households. We are continuously monitoring this program for its effectiveness and want to make sure it is being used properly.
For updates and additional information on the SFMTA’s Slow Street Program, visit the program webpage at SFMTA.com/SlowStreets. Please also visit SFMTA.com/COVID19 for the latest agency updates about our COVID-19 response.
Published May 16, 2020 at 05:56PM
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