#Meshkat

[meshkatsblog]

এই পৃথিবীতে সবাই অচেনা।

স্বার্থের কারণে আমরা একে অন্যকে চিনি। 😇

[ahlulbaytnetworks]

🍃🕊🍃 Imam Reza (as)

"To be patient in the face of hardships is a virtue but to refrain from forbidden deeds is a greater one."

(Meshkat al-Anwar, pg. 22)

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[zakirnaikpersonal]

The Meshkat Club in Collaboration with the Public Relations Department in Qatar University, Invites you to attend a lecture titled: Da’wah or Destruction?

Public Lecture by Dr Zakir Naik

26th March 2:00pm Local Time Qatar

Qatar University, Student Affairs Building (I11), Auditorium,Doha, Qatar

[loverandservantoftheahlulbayt]

🍃🕊🍃 Imam Reza (as)

"To be patient in the face of hardships is a virtue but to refrain from forbidden deeds is a greater one."

(Meshkat al-Anwar, pg. 22)

.

[dlsphchijournalism]

CANADA’S NATIONAL OBSERVER -- ‘People are going to experience frostbite, people are going to have more amputations’

BY NAZANIN MESHKAT (CHI ‘22) -- When unhoused people in Toronto run out of options, they turn to the city’s overcrowded emergency departments for shelter. READ MORE. 

[industrial-automation]

Controlling Valve - What are the Most Common Valve Types?

Numerous valve types are available for usage in a wide range of sectors and applications. When it relates to flow control valves, they come in a variety of configurations; some are clever enough to automatically adapt to pressure and temperature differences. Flow control valves, regardless of their structure, are used to restrict the flow or force of fluids, and they often respond to signals given by flow meters or temperature gauges.

What Is a Flow Control Valve's Purpose?

Flow control valves may perform a variety of duties in a hydraulic flow system, depending on the type utilized. A flow control valve is usually used to manage the speed of engines or cylinders inside a system. This function is achievable because a flow control valve has the capacity to alter the rate of energy transmission at any point in a system by altering the flow rate.

The Types of Valves

The most common types ordered by valves suppliers include:

1.  Gate Valves

Gate valves are general-purpose valves that are generally utilized in on/off, non-throttling applications. Gate valves are utilized in applications that need a straight-line flow of fluid with little turbulence. Gate valves are one sort of desirable control valve limitation. Gate valves are operated by rotating the stem clockwise to shut (CTC) or clockwise to open (CTO). When an operator adjusts the stem, the gate travels up or down on the threaded step, that is why it is a multi-turn valve; the valve must turn numerous times from open to closed, and this sluggish action eliminates water hammer effects. Additionally, engineers use gate valves where low-pressure drop and a free bore are necessary. Typical gate valves contain no obstructions in the flow stream, resulting in very little pressure loss.

2. Globe Valves

Globe valves are linear motion valves that stop, start, and control flow. Globe valves are closed by lowering a plug with a flat as well as convex bottom onto a horizontal seat located in the valve's center. When the valve is opened, the stopper is raised to enable fluid to flow. Globe valves are utilized for on/off and throttling applications since the valve's disc may be fully withdrawn from the flow stream or totally closed. While this form of flow control valve produces somewhat larger pressure dips than straight-through valves such as a gate, plug, or ball valve, it is useful in circumstances when the pressure is low through the valve is irrelevant.

3. Pinch Valves

Pinch valves are economical flow control valves that are appropriate for sludges or liquids containing considerable volumes of suspended particles. Pinch valves operate by pinching one or even more flexible parts, such as rubber tubes, to shut off the flow. These rubber sleeves are the only component of the valve that is wet, and their flexibility enables pinch valves to seal securely around entrapped particles. To activate pinch valves, air or hydraulic pressure is applied directly to the elastomer sleeve. The body of a pinch valve functions as an integrated actuator, obviating the need for costly hydraulic, pneumatic, as well as electric operators and enhancing the cost-effectiveness of this form of the flow controlling valve.

Conclusion

Flow control valves are utilized in a number of different applications, including plumbing, electromechanical, and gas dispensing. When selecting the right flow control valve for a purpose, several elements must be considered, including the fluid's characteristics, service conditions, the frequency with which the valve is used, as well as maintenance and environmental concerns.

With a number of valve types available, we at Meshkat Automation, one of the best valves manufacturers in Saudi Arabia, will help in evaluating the function and performance of different valves against the requirements of your application can assist you in selecting the most appropriate flow control valve for your applications.

[mehdizareiran]

At least 5 #paleofloods in a alluvial terrace of #meshkat #river #flooding , 21 May 2019 حداقل پنج #ديرينه_سيلاب #سيل در يك ترراس آبرفتي رودخانه #مشكات #كاشان ديده مي شود ، بازديد در ٣١-٢-٩٨ https://www.instagram.com/p/Bx1mSehDgRL/?igshid=1ba7rh8krwjq

[west150]

Qajari paintings and meshkat

Melli bank museum/Tehran

[karballa]

Imam Reza (AS): "To be patient in the face of hardships is a virtue but to refrain from forbidden deeds is a greater one." Meshkat al-Anwar, P. 22

[divyabhashkar]

Angella Okutoyi and Meshkat al-Zahra Safi make history at Australian Open

Angella Okutoyi and Meshkat al-Zahra Safi make history at Australian Open

Iran’s Meshkat al-Zahra Safi and Kenya’s Angella Okutoyi have both reached historic milestones at the first grand slam of the year and have been inspiring the next generation of talent. On Sunday, Okutoyi became the first girl from Kenya to win a grand slam juniors match and she is showing no signs of slowing down. After beating Australian Zara Larke in three sets on Tuesday, she is now the first…

[spaceexp]

Giant Exoplanet Hunters: Look for Debris Disks

JPL - Jet Propulsion Laboratory logo. Oct. 11, 2017

Image above: This artist's rendering shows a large exoplanet causing small bodies to collide in a disk of dust. Image Credits: NASA/JPL-Caltech. There's no map showing all the billions of exoplanets hiding in our galaxy -- they're so distant and faint compared to their stars, it's hard to find them. Now, astronomers hunting for new worlds have established a possible signpost for giant exoplanets. A new study finds that giant exoplanets that orbit far from their stars are more likely to be found around young stars that have a disk of dust and debris than those without disks. The study, published in The Astronomical Journal, focused on planets more than five times the mass of Jupiter. This study is the largest to date of stars with dusty debris disks, and has found the best evidence yet that giant planets are responsible for keeping that material in check. "Our research is important for how future missions will plan which stars to observe," said Tiffany Meshkat, lead author and assistant research scientist at IPAC/Caltech in Pasadena, California. Meshkat worked on this study as a postdoctoral researcher at NASA's Jet Propulsion Laboratory in Pasadena. "Many planets that have been found through direct imaging have been in systems that had debris disks, and now we know the dust could be indicators of undiscovered worlds." Astronomers found the likelihood of finding long-period giant planets is nine times greater for stars with debris disks than stars without disks. Caltech graduate student Marta Bryan performed the statistical analysis that determined this result. Researchers combined data from 130 single-star systems with debris disks detected by NASA's Spitzer Space Telescope, and compared them with 277 stars that do not appear to host disks. The two star groups were between a few million and 1 billion years old. Of the 130 stars, 100 were previously scanned for exoplanets. As part of this study, researchers followed up on the other 30 using the W. M. Keck Observatory in Hawaii and the European Southern Observatory's Very Large Telescope in Chile. They did not detect any new planets in those 30 systems, but the additional data helped characterize the abundance of planets in systems with disks. The research does not directly resolve why the giant exoplanets would cause debris disks to form. Study authors suggest the massive gravity of giant planets causes small bodies called planetesimals to collide violently, rather than form proper planets, and remain in orbit as part of a disk. "It's possible we don't find small planets in these systems because, early on, these massive bodies destroyed the building blocks of rocky planets, sending them smashing into each other at high speeds instead of gently combining," said co-author Dimitri Mawet, a Caltech associate professor of astronomy and a JPL senior research scientist. On the other hand, giant exoplanets are easier to detect than rocky planets, and it is possible that there are some in these systems that have not yet been found. Our own solar system is home to gas giants responsible for making "debris belts" -- the asteroid belt between Mars and Jupiter, shaped by Jupiter, and the Kuiper Belt, shaped by Neptune. Many of the systems Meshkat and Mawet studied also have two belts, but they are also much younger than ours -- up to 1 billion years old, compared to our system's present age of 4.5 billion years. The youth of these systems partly explains why they contain much more dust -- resulting from the collisions of small bodies -- than ours does. One system discussed in the study is Beta Pictoris, which has been directly imaged from ground-based telescopes. This system has a debris disk, comets and one confirmed exoplanet. In fact, scientists predicted this planet's existence well before it was confirmed, based on the presence and structure of the prominent disk. In a different scenario, the presence of two dust belts in a single debris disk suggests there are likely more planets in the system whose gravity maintains these belts, as is the case in the HR8799 system of four giant planets. The gravitational forces of giant planets nudge passing comets inward toward the star, which could mimic the period of our solar system's history about 4 billion years ago known as the Late Heavy Bombardment. Scientists think that during that period, the migration of Jupiter, Saturn, Uranus and Neptune deflected dust and small bodies into the Kuiper and asteroid belts we see today. When the Sun was young, there would have been a lot more dust in our solar system as well. "By showing astronomers where future missions such as NASA's James Webb Space Telescope have their best chance to find giant exoplanets, this research paves the way to future discoveries," said Karl Stapelfeldt of JPL, chief scientist of NASA's Exoplanet Exploration Program Office and study co-author. For more information about exoplanets, visit: https://exoplanets.nasa.gov Image (mentioned), Text, Credits: NASA/Tony Greicius/JPL/Elizabeth Landau. Greetings, Orbiter.ch Full article

[scifigeneration]

Giant exoplanet hunters: Look for debris disks

There's no map showing all the billions of exoplanets hiding in our galaxy -- they're so distant and faint compared to their stars, it's hard to find them. Now, astronomers hunting for new worlds have established a possible signpost for giant exoplanets.

A new study finds that giant exoplanets that orbit far from their stars are more likely to be found around young stars that have a disk of dust and debris than those without disks. The study, published in The Astronomical Journal, focused on planets more than five times the mass of Jupiter. This study is the largest to date of stars with dusty debris disks, and has found the best evidence yet that giant planets are responsible for keeping that material in check.

"Our research is important for how future missions will plan which stars to observe," said Tiffany Meshkat, lead author and assistant research scientist at IPAC/Caltech in Pasadena, California. Meshkat worked on this study as a postdoctoral researcher at NASA's Jet Propulsion Laboratory in Pasadena. "Many planets that have been found through direct imaging have been in systems that had debris disks, and now we know the dust could be indicators of undiscovered worlds."

Astronomers found the likelihood of finding long-period giant planets is nine times greater for stars with debris disks than stars without disks. Caltech graduate student Marta Bryan performed the statistical analysis that determined this result.

Researchers combined data from 130 single-star systems with debris disks detected by NASA's Spitzer Space Telescope, and compared them with 277 stars that do not appear to host disks. The two star groups were between a few million and 1 billion years old. Of the 130 stars, 100 were previously scanned for exoplanets. As part of this study, researchers followed up on the other 30 using the W. M. Keck Observatory in Hawaii and the European Southern Observatory's Very Large Telescope in Chile. They did not detect any new planets in those 30 systems, but the additional data helped characterize the abundance of planets in systems with disks.

The research does not directly resolve why the giant exoplanets would cause debris disks to form. Study authors suggest the massive gravity of giant planets causes small bodies called planetesimals to collide violently, rather than form proper planets, and remain in orbit as part of a disk.

"It's possible we don't find small planets in these systems because, early on, these massive bodies destroyed the building blocks of rocky planets, sending them smashing into each other at high speeds instead of gently combining," said co-author Dimitri Mawet, a Caltech associate professor of astronomy and a JPL senior research scientist.

On the other hand, giant exoplanets are easier to detect than rocky planets, and it is possible that there are some in these systems that have not yet been found.

Our own solar system is home to gas giants responsible for making "debris belts" -- the asteroid belt between Mars and Jupiter, shaped by Jupiter, and the Kuiper Belt, shaped by Neptune. Many of the systems Meshkat and Mawet studied also have two belts, but they are also much younger than ours -- up to 1 billion years old, compared to our system's present age of 4.5 billion years. The youth of these systems partly explains why they contain much more dust -- resulting from the collisions of small bodies -- than ours does.

One system discussed in the study is Beta Pictoris, which has been directly imaged from ground-based telescopes. This system has a debris disk, comets and one confirmed exoplanet. In fact, scientists predicted this planet's existence well before it was confirmed, based on the presence and structure of the prominent disk.

In a different scenario, the presence of two dust belts in a single debris disk suggests there are likely more planets in the system whose gravity maintains these belts, as is the case in the HR8799 system of four giant planets. The gravitational forces of giant planets nudge passing comets inward toward the star, which could mimic the period of our solar system's history about 4 billion years ago known as the Late Heavy Bombardment. Scientists think that during that period, the migration of Jupiter, Saturn, Uranus and Neptune deflected dust and small bodies into the Kuiper and asteroid belts we see today. When the Sun was young, there would have been a lot more dust in our solar system as well.

"By showing astronomers where future missions such as NASA's James Webb Space Telescope have their best chance to find giant exoplanets, this research paves the way to future discoveries," said Karl Stapelfeldt of JPL, chief scientist of NASA's Exoplanet Exploration Program Office and study co-author.

[dlsphchijournalism]

CANADA’S NATIONAL OBSERVER -- Is your asthma inhaler ruining the planet?

BY NAZANIN MESHKAT (CHI ‘21) -- Every time they use their puffers, up to six million Canadians with respiratory diseases like asthma and emphysema unknowingly release dangerous greenhouse gasses into the air. One hundred puffs of a metered dose inhaler (MDI) produce as many greenhouse gases (GHGs) emissions as a 290-kilometre drive in a gas-powered car. READ MORE. 

[mehdizareiran]

#drought and #landsubcidence in #meshkat #kashan Iran 21 May 2019 #خشكسالي و #فرونشست #زمين در جنب شهر #مشكات #كاشان ، بازديد ٣١-٢-٩٨ https://www.instagram.com/p/Bx1kWpjjpCf/?igshid=g5s07bqyony

[foodforyourbody]

via RSS feed - SEOCheckOut I will design a book cover /logo/animated illustration/flyer/web banner or business cards for you and provide you with the format you need by: Meshkat Created: -- Category: Art & Design Viewed: 19

https://ift.tt/2GA8Rob

[kamran0913]

جیمز ریچاردسون یکی از مجریان و کارشناسان باسابقه فوتبال انگلستان #علیرضا_جهانبخش گران‌ترین بازیکن تاریخ #برایتون را بعنوان یکی از ۵ بازیکنی معرفی کرده که شخصیتی دوست داشتنی و با اخلاقی دارند #لیگ_برتر_انگلستان pic.twitter.com/N0UewRfXqL

— Kaveh Meshkat (@kavehmeshkat) August 8, 2018