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in a barely 12-sec clip we get: • effective shift in register—smooth transition from chest to head • diaphragm control while sitting down, allowing; - excellent breathing technique - volume control—smooth crescendo and diminuendo • intonation tht reflects lyrical emotion by adding slight vibrato at the end 👏 Kihyun,...

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(REST) Ayla

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21,451 Aufrufe • vor 1 Jahr •via X (Twitter)

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This post about bench press safety escaped containment and got a lot of people commenting in disagreement that safeties/spotter arms would've saved him. And in truth, my language below was a little too absolute: safeties MIGHT have saved his life (though even if so, would not have prevented all damage), but it's far from certain that they would have, so I stand by the overall sentiment. I will explain in detail below. The spotter arms have to be set below the top of your arched chest or else they’ll interfere with every rep - you'll clang the bar on the safeties, which not only severely interrupts proper technique and performance, but can also be potentially injurious in its own right as the clanging against the safeties takes you out of the rhythm of the rep and leads to uneven and chaotic force application demands mid-rep. The safeties can’t be set a mere milimeter or even a half inch below the chest: both because most racks have 2-3 inch hole spacings that don't allow such finely calibrated setting, but even if they do - also because as a gross movement pattern, not a fine movement pattern, you can’t control the movement of the bar precisely and accurately enough not to clang the safeties if they’re so close to your chest. Human beings performing gross movement patterns simply lack such fine control: on heavy sets, the bar might be slightly uneven on one side, you might lose a touch of your arch over the course of the set, etc... and end up clanging the safeties anyway, if they're set so close to the top of your arched chest. These issues are not form errors that can be prevented with proper training, but are inherent limitations in the human capability to control gross motor pattern movements at a heavy weight. Thus, the safeties have to be far enough below your chest in order to not interfere with the set itself, such that they can’t possibly catch the bar before it hits your chest in the case of a sudden catastrophic drop. The proper placement for the safeties is far enough below your chest so as not to interfere with the normal execution of the set and so the bar never touches the safeties at all during the set, even with the inherent human limitations of gross motor pattern control. But high enough such tha - if you find yourself unable to successfully press the bar to lockout - you can bring the bar under control back down to your chest, exhale and drop your arch, and the bar will ideally now rest on the safeties instead of your chest and you can crawl and slither out from under it. Worst case, you can roll the bar slightly upwards and the safeties will soon take it, well before it would lie on your neck. I have an example of using the safeties this way in the video below, with 485 lbs. The ability to set this position with precision and accuracy depends on the equipment you're using: Some racks/benches have 1 inch spacings for this purpose, which is excellent and allows greater precision in safety placement, but most common racks have 2-3 inches between holes and thus people must often have the safeties a little lower than they'd ideally be. The main point is the proper use and purpose of safeties in the bench press is not really to catch a very rare catastrophic sudden drop onto your chest, but to allow you to survive the much more common situation of a normal failed rep. Could they theoretically save your life in such a situation where you drop it? Yes, they might. They won't stop the bar before it hits your chest but they might reduce the impact by stopping the bar from going further down and reducing the impact. This may or may not save your life in this rare catastrophic drop situation - it's good to have them there, set up anyway, but it's far from a sure bet. The most important things you can do are to learn and practice good technique, which involves stiff wrists in a very slightly bent back position, and thumbs around the barbell - NO SUICIDE GRIP. The safeties won't catch the bar and stop it from hitting your chest, so it's best to reduce the chances of dropping the bar on your chest from almost zero to even closer to almost zero. I've been bench pressing regularly for well over 20 years, always put my thumbs around the bar, and have never dropped it on myself. Nor has anyone I have coached to the best of my memory, over tens of thousands of sets and hundreds of thousands of reps. I have used safeties to successfully avoid getting trapped under the bar after a failed rep. In the video below, I tweaked my pec while pushing through a rep at 485 and had to set the bar on the pins to avoid getting trapped under it. This kind of situation is the primary use for the safeties. It's good to have them set up regardless - they might indeed save you if you somehow still manage to drop the bar, but they also very well might not.
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This post about bench press safety escaped containment and got a lot of people commenting in disagreement that safeties/spotter arms would've saved him. And in truth, my language below was a little too absolute: safeties MIGHT have saved his life (though even if so, would not have prevented all damage), but it's far from certain that they would have, so I stand by the overall sentiment. I will explain in detail below. The spotter arms have to be set below the top of your arched chest or else they’ll interfere with every rep - you'll clang the bar on the safeties, which not only severely interrupts proper technique and performance, but can also be potentially injurious in its own right as the clanging against the safeties takes you out of the rhythm of the rep and leads to uneven and chaotic force application demands mid-rep. The safeties can’t be set a mere milimeter or even a half inch below the chest: both because most racks have 2-3 inch hole spacings that don't allow such finely calibrated setting, but even if they do - also because as a gross movement pattern, not a fine movement pattern, you can’t control the movement of the bar precisely and accurately enough not to clang the safeties if they’re so close to your chest. Human beings performing gross movement patterns simply lack such fine control: on heavy sets, the bar might be slightly uneven on one side, you might lose a touch of your arch over the course of the set, etc... and end up clanging the safeties anyway, if they're set so close to the top of your arched chest. These issues are not form errors that can be prevented with proper training, but are inherent limitations in the human capability to control gross motor pattern movements at a heavy weight. Thus, the safeties have to be far enough below your chest in order to not interfere with the set itself, such that they can’t possibly catch the bar before it hits your chest in the case of a sudden catastrophic drop. The proper placement for the safeties is far enough below your chest so as not to interfere with the normal execution of the set and so the bar never touches the safeties at all during the set, even with the inherent human limitations of gross motor pattern control. But high enough such tha - if you find yourself unable to successfully press the bar to lockout - you can bring the bar under control back down to your chest, exhale and drop your arch, and the bar will ideally now rest on the safeties instead of your chest and you can crawl and slither out from under it. Worst case, you can roll the bar slightly upwards and the safeties will soon take it, well before it would lie on your neck. I have an example of using the safeties this way in the video below, with 485 lbs. The ability to set this position with precision and accuracy depends on the equipment you're using: Some racks/benches have 1 inch spacings for this purpose, which is excellent and allows greater precision in safety placement, but most common racks have 2-3 inches between holes and thus people must often have the safeties a little lower than they'd ideally be. The main point is the proper use and purpose of safeties in the bench press is not really to catch a very rare catastrophic sudden drop onto your chest, but to allow you to survive the much more common situation of a normal failed rep. Could they theoretically save your life in such a situation where you drop it? Yes, they might. They won't stop the bar before it hits your chest but they might reduce the impact by stopping the bar from going further down and reducing the impact. This may or may not save your life in this rare catastrophic drop situation - it's good to have them there, set up anyway, but it's far from a sure bet. The most important things you can do are to learn and practice good technique, which involves stiff wrists in a very slightly bent back position, and thumbs around the barbell - NO SUICIDE GRIP. The safeties won't catch the bar and stop it from hitting your chest, so it's best to reduce the chances of dropping the bar on your chest from almost zero to even closer to almost zero. I've been bench pressing regularly for well over 20 years, always put my thumbs around the bar, and have never dropped it on myself. Nor has anyone I have coached to the best of my memory, over tens of thousands of sets and hundreds of thousands of reps. I have used safeties to successfully avoid getting trapped under the bar after a failed rep. In the video below, I tweaked my pec while pushing through a rep at 485 and had to set the bar on the pins to avoid getting trapped under it. This kind of situation is the primary use for the safeties. It's good to have them set up regardless - they might indeed save you if you somehow still manage to drop the bar, but they also very well might not.

Deep Squats, Shallow Thoughts

922,414 Aufrufe • vor 7 Monaten

Bullshit Im a Christian Arab Israeli and son of a priest from Nazareth. While you spread ridiculous conspiracies about my country, I live in the only country in the region where Christianity is growing. You aren't interested in protecting Christians you are interested in smearing my country while Christians are slaughtered all over this region like cattle. Where was your outrage about that? About the persecution of Christians under Hamas or under the Palestinian Authority? Where is your in-depth report about how the Palestinian leadership has overseen a decline of Christians in Bethlehem since Israel relenquished control of the city to the PA? We used to be 80% of Bethlehem under the PA we are less than 20%! You are so obsessed with criticizing Israel for the likes ans clicks of your Nazi fans that you are throwing us Christians of MENA under the bus. If you're not a coward, debate me yourself. Enough of this slander.
0:15

Bullshit Im a Christian Arab Israeli and son of a priest from Nazareth. While you spread ridiculous conspiracies about my country, I live in the only country in the region where Christianity is growing. You aren't interested in protecting Christians you are interested in smearing my country while Christians are slaughtered all over this region like cattle. Where was your outrage about that? About the persecution of Christians under Hamas or under the Palestinian Authority? Where is your in-depth report about how the Palestinian leadership has overseen a decline of Christians in Bethlehem since Israel relenquished control of the city to the PA? We used to be 80% of Bethlehem under the PA we are less than 20%! You are so obsessed with criticizing Israel for the likes ans clicks of your Nazi fans that you are throwing us Christians of MENA under the bus. If you're not a coward, debate me yourself. Enough of this slander.

יוסף חדאד - Yoseph Haddad

741,464 Aufrufe • vor 8 Monaten

The 2nd Robot Marathon has officially begun in Beijing. This year feels different. 1. Around 40% of teams are running fully autonomous, no remote control. 2. Top robots are already hitting ~10s per 100 meter, getting surprisingly close to human sprint limits. 3. You can also see much better safety design upfront. Way more structured than last year’s chaos. 4. Still, failures happen. Marathon distance pushes motors, structure, and control to the limit. What works in short demos breaks down over longer runs. Overall, a big step forward, but also a reminder that real-world robotics is still far from the polished demo videos you get fed from companies.
0:13

The 2nd Robot Marathon has officially begun in Beijing. This year feels different. 1. Around 40% of teams are running fully autonomous, no remote control. 2. Top robots are already hitting ~10s per 100 meter, getting surprisingly close to human sprint limits. 3. You can also see much better safety design upfront. Way more structured than last year’s chaos. 4. Still, failures happen. Marathon distance pushes motors, structure, and control to the limit. What works in short demos breaks down over longer runs. Overall, a big step forward, but also a reminder that real-world robotics is still far from the polished demo videos you get fed from companies.

Eren Chen

848,742 Aufrufe • vor 3 Monaten

Last night felt unreal. i don’t think it has fully registered with me yet that we got hit by a tornado. firstly i’ll start out by saying troy, me, and the dogs are okay. thank you God. we stayed in the basement laying down under a mattress while we heard crashing and felt the house shaking. after the first wave, we rushed upstairs to my office to grab my streaming computer and put it somewhere safe. never in a million years did i think that in those short couple minutes i would have the weight of my entire ceiling crashing down on my head. it happened so fast and all i could hear was troy screaming my name. it was pitch black. he grabbed my arm and pulled me out of the debris as we ran back downstairs with the dogs. then the second wave came. we could hear more ceiling crashing down from upstairs and water was seeping onto us in the basement. we made the decision to completely evacuate the house and drive to my grandparents house, which was terrifying in its own right. power lines were knocked down in the road and we had no service. i think we’re both kind of in shock. we worked so hard on our home & were very proud of it, but at the end of the day, i’m just grateful to have made it out alive with only a welt on the back of my head. i hope everyone else is doing okay
0:15

Last night felt unreal. i don’t think it has fully registered with me yet that we got hit by a tornado. firstly i’ll start out by saying troy, me, and the dogs are okay. thank you God. we stayed in the basement laying down under a mattress while we heard crashing and felt the house shaking. after the first wave, we rushed upstairs to my office to grab my streaming computer and put it somewhere safe. never in a million years did i think that in those short couple minutes i would have the weight of my entire ceiling crashing down on my head. it happened so fast and all i could hear was troy screaming my name. it was pitch black. he grabbed my arm and pulled me out of the debris as we ran back downstairs with the dogs. then the second wave came. we could hear more ceiling crashing down from upstairs and water was seeping onto us in the basement. we made the decision to completely evacuate the house and drive to my grandparents house, which was terrifying in its own right. power lines were knocked down in the road and we had no service. i think we’re both kind of in shock. we worked so hard on our home & were very proud of it, but at the end of the day, i’m just grateful to have made it out alive with only a welt on the back of my head. i hope everyone else is doing okay

Dhruv

27,144 Aufrufe • vor 1 Jahr

Following the Airbus A320 emergency airworthiness action, everyone will be talking about the ELAC (Elevator Aileron Computer) manufactured by Thales, which caused a sudden pitch-down without pilot input on JetBlue 1230 back in October. So here’s everything you need to know about ELAC. The ELAC System in the Airbus A320: The Brains Behind Pitch and Roll Control At the heart of the sophisticated fly-by-wire flight control system of the Airbus A320 lies the ELAC (Elevator Aileron Computer). This crucial component acts as one of the primary computational units that translate pilot commands into precise movements of the aircraft’s fundamental control surfaces: the elevators and the ailerons. ELAC plays a pivotal role in ensuring the aircraft’s stability and enabling smooth, safe, and efficient flight. What is ELAC? ELAC stands for Elevator Aileron Computer. On the A320, there are two main ELAC computers—ELAC 1 and ELAC 2—which operate together as essential elements of the aircraft’s fly-by-wire architecture. This system relies on electrical signals, rather than traditional mechanical cables, to transmit control inputs from the cockpit to the flight control surfaces. Key Functions of the ELAC System: Elevator Control: The elevators are control surfaces located on the horizontal tailplane of the aircraft. They govern movement around the lateral axis (pitch), determining whether the aircraft ascends or descends. ELAC receives signals from the pilot’s sidestick and translates them into precise commands to move the elevators, achieving the desired pitch attitude. Aileron Control: Ailerons are control surfaces situated on the trailing edge of the wings. They manage movement around the longitudinal axis (roll), controlling the aircraft’s banking to the left or right. The ELAC processes pilot inputs and moves the ailerons to achieve the intended bank angle. Implementing Flight Control Laws: One of ELAC’s most critical responsibilities is enforcing the pre-programmed flight control laws embedded within the Airbus computers. These laws ensure the aircraft responds to pilot commands in a calculated and safe manner, providing protection against maneuvers that could exceed operational limits (such as overspeed or critical angles of attack). Fault Monitoring and Redundancy: The ELAC system includes a high degree of redundancy to ensure safety. If one ELAC computer malfunctions, the other can seamlessly take over. ELAC also continuously monitors the performance of control surfaces and associated systems, issuing warnings to the crew if any anomalies are detected. ELAC 1 and ELAC 2: Distribution and Responsibility ELAC 1: Primarily controls the ailerons and certain elevator functions, especially those relying on the blue hydraulic system. ELAC 2: Primarily controls the elevators and the Trimmable Horizontal Stabilizer (THS), utilizing the green and yellow hydraulic systems. Info via Ashraf Yehia, Aircraft Structure Repair Engineer/LinkedIn.
0:13

Following the Airbus A320 emergency airworthiness action, everyone will be talking about the ELAC (Elevator Aileron Computer) manufactured by Thales, which caused a sudden pitch-down without pilot input on JetBlue 1230 back in October. So here’s everything you need to know about ELAC. The ELAC System in the Airbus A320: The Brains Behind Pitch and Roll Control At the heart of the sophisticated fly-by-wire flight control system of the Airbus A320 lies the ELAC (Elevator Aileron Computer). This crucial component acts as one of the primary computational units that translate pilot commands into precise movements of the aircraft’s fundamental control surfaces: the elevators and the ailerons. ELAC plays a pivotal role in ensuring the aircraft’s stability and enabling smooth, safe, and efficient flight. What is ELAC? ELAC stands for Elevator Aileron Computer. On the A320, there are two main ELAC computers—ELAC 1 and ELAC 2—which operate together as essential elements of the aircraft’s fly-by-wire architecture. This system relies on electrical signals, rather than traditional mechanical cables, to transmit control inputs from the cockpit to the flight control surfaces. Key Functions of the ELAC System: Elevator Control: The elevators are control surfaces located on the horizontal tailplane of the aircraft. They govern movement around the lateral axis (pitch), determining whether the aircraft ascends or descends. ELAC receives signals from the pilot’s sidestick and translates them into precise commands to move the elevators, achieving the desired pitch attitude. Aileron Control: Ailerons are control surfaces situated on the trailing edge of the wings. They manage movement around the longitudinal axis (roll), controlling the aircraft’s banking to the left or right. The ELAC processes pilot inputs and moves the ailerons to achieve the intended bank angle. Implementing Flight Control Laws: One of ELAC’s most critical responsibilities is enforcing the pre-programmed flight control laws embedded within the Airbus computers. These laws ensure the aircraft responds to pilot commands in a calculated and safe manner, providing protection against maneuvers that could exceed operational limits (such as overspeed or critical angles of attack). Fault Monitoring and Redundancy: The ELAC system includes a high degree of redundancy to ensure safety. If one ELAC computer malfunctions, the other can seamlessly take over. ELAC also continuously monitors the performance of control surfaces and associated systems, issuing warnings to the crew if any anomalies are detected. ELAC 1 and ELAC 2: Distribution and Responsibility ELAC 1: Primarily controls the ailerons and certain elevator functions, especially those relying on the blue hydraulic system. ELAC 2: Primarily controls the elevators and the Trimmable Horizontal Stabilizer (THS), utilizing the green and yellow hydraulic systems. Info via Ashraf Yehia, Aircraft Structure Repair Engineer/LinkedIn.

Turbine Traveller

486,745 Aufrufe • vor 7 Monaten

I worked in the pest control biz my entire life before a career pivot. I share this video about 1X per year to remind people during travel times that you can easily pick up bed bugs from family members you visit and hotels you visit during the holidays. This is why. The video is one I personally took at my days at Orkin. It’s the worst bed bug case I saw in my 25 yr pest control career. This is someone’s home. They slept in this bed every night. And the bed bugs fed every night and reproduced. YOUR problem is that individuals like this then go out to stores, to movie theaters, fly on planes, go to the doctor and sit in the waiting room chairs, come to your house for Thanksgiving, Christmas and New Years celebrations (or you go to theirs)…and they drop them off from the clothing they wear. German Roaches 🪳 often get introduced into people’s homes/apartments. In the video, we slid the mattress to the side (the sides of it were black from dried blood in many spots), and what you are seeing are thousands and thousands of bed bugs on the box spring.
0:14

I worked in the pest control biz my entire life before a career pivot. I share this video about 1X per year to remind people during travel times that you can easily pick up bed bugs from family members you visit and hotels you visit during the holidays. This is why. The video is one I personally took at my days at Orkin. It’s the worst bed bug case I saw in my 25 yr pest control career. This is someone’s home. They slept in this bed every night. And the bed bugs fed every night and reproduced. YOUR problem is that individuals like this then go out to stores, to movie theaters, fly on planes, go to the doctor and sit in the waiting room chairs, come to your house for Thanksgiving, Christmas and New Years celebrations (or you go to theirs)…and they drop them off from the clothing they wear. German Roaches 🪳 often get introduced into people’s homes/apartments. In the video, we slid the mattress to the side (the sides of it were black from dried blood in many spots), and what you are seeing are thousands and thousands of bed bugs on the box spring.

BowTiedBroke

1,011,276 Aufrufe • vor 7 Monaten