![]() ![]() ![]() There were three total lunar eclipses in 2018, for example. As a result, lunar eclipses tend to come in batches when the Moon is at a similar inclination. This is because the Moon's orbit around Earth is not in a flat plane - it's angled at about five degrees, which means that the Moon often goes above or below Earth's shadow as it orbits around. But despite the Moon only taking 29.5 days to orbit Earth and complete a cycle from full Moon to full Moon, there are only on average about three lunar eclipses every year. Why isn't there a lunar eclipse every month?Ī lunar eclipse only occurs during a full Moon, when the Sun, Earth and Moon are all aligned. Try to minimise the light in your vicinity and, ideally, watch from a spot where your line of sight won't be obstructed by tall buildings or trees.Ī lunar eclipse can last several hours, but the period of totality - when the Moon is completely in Earth's shadow - usually only lasts an hour or so. To get the best view you'll need to be on the night side of Earth when one occurs, and you'll need a clear sky that's free of clouds. How to get the best view of a lunar eclipse This is because lunar eclipses only reflect sunlight - they don't get any brighter than a full Moon, which you've probably safely observed many times before. In the sun, if you hold an umbrella, the sun will cast a shadow over the umbrella, making it the darkest part of the shadow. This only happens occasionally, because the Moon doesnt orbit in the exact same plane as the Sun and Earth do. People in the umbra will see a total eclipse, while people in the penumbra will see a partial eclipse. the umbra is the darkest part of the moons shadow during an eclipse. A solar eclipse happens when the Moon passes between the Sun and Earth, casting a shadow on Earth that either fully or partially blocks the Sun’s light in some areas. The shadow consists of two parts, the umbra, where the Sun is completely blocked, and the penumbra, where the Sun is partially obscured. Send us feedback about these examples.The good thing about all types of lunar eclipse is that, unlike a solar eclipse, they are safe to view with the naked eye. During a solar eclipse, the Moon's shadow on Earth’s surface is only about 300 miles (480 km) wide. noun The completely dark central portion of the shadow cast by the earth, moon, or other body during an eclipse. These examples are programmatically compiled from various online sources to illustrate current usage of the word 'lunar eclipse.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. ![]() 2022 The total lunar eclipse will be visible throughout North America in the predawn hours - the farther west, the better - and across Asia, Australia and the rest of the Pacific after sunset. 2023 On November 8, a total blood lunar eclipse will be visible from Australia, the United States, Asia, parts of Northern and Eastern Europe, and most of South America. Leada Gore | al, On October 28, a partial lunar eclipse will be viewable by people in Europe, Asia, Australia, Africa, parts of North America and much of South America. 2022 During a total lunar eclipse, blue light is filtered out of the light hitting the moon while red light can still make it through, casting a ruddy hue on the moon. 2023 The November full moon coincides with a lunar eclipse, giving us a Blood Moon. Richard Tribou, Orlando Sentinel, This year, a faint penumbral lunar eclipse will be discernible from parts of Australia, Africa, and Asia on May 5, with a partial eclipse visible in areas of the Americas, Europe, Africa, Asia, and Australia on October 28. 2022 Night owls were treated to a massive nightlight phenomenon Sunday night and early Monday with the sort-of-super flower blood moon lunar eclipse. Correspondingly, penumbra is synonymous with marginal. Position The penumbra is situated at the perimeters while the umbra is at the center, directly behind the object. Umbra is similarly defined as shade while penumbra means partial shade. Using the word umbra, explain how a total lunar eclipse occurs. We, at Vaonis, plan to record it with our smart telescopes Vespera and Stellina. Umbra is the dark part while penumbra is the lighter part. including the penumbra and umbra portions of the shadow. On October 14 2023, an annular solar eclipse will be visible from the United States. Recent Examples on the Web After Tuesday's eclipse, the next total lunar eclipse will not occur again until March 14, 2025, according to NASA. Path Of Totality, Umbra And Penumbra Vaonis > Tips & News > Path Of Totality, Umbra And Penumbra Solar eclipses are rare due to specific conditions. Umbra is a kind of shadow where the light source is completely blocked by the obstructing body The total lunar eclipse occurs when the earths shadow umbra.
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![]() In a YugabyteDB Friday Tech Talk (YFTT), I discussed these techniques and highlighted the significance of range sharding for distributed SQL databases. However, if the filter returns most of the table’s row, a full table scan (Seq Scan) is probably the most efficient. The mentioned indexes are designed to prevent full table scans and contribute to improved performance so that the response time isn’t directly tied to the total number of rows in the table. Understanding the time complexity and scalability of the execution plan is crucial. Performance may vary if you utilize a different storage system, like YugabyteDB, that doesn’t necessitate vacuuming or employ bitmap scan. Response time can fluctuate due to factors like query patterns, cached data, concurrent workload, and database system configuration.įor instance, when working with PostgreSQL, or a PostgreSQL-compatible database, the response time may be influenced by vacuuming, the utilization of a GIN index with bitmap scan, and the number of Rows Removed by Index Recheck. To evaluate performance and scalability, I prioritize running small reproducible examples and analyzing the execution plan rather than relying solely on response time. Index Scan using words_word_trgm on words (actual time=12.604.119.505 rows=56 loops=1)Ī GIN index on trigrams is useful for generic text search, but if all you need is a prefix, a direct index will be more efficient. It can show more false positive (There’s still work in progress to optimize it-see Github issue #7850): yugabyte=> explain (analyze, costs off, summary off) ![]() Because YugabyteDB distributes rows and not pages, it doesn’t do any bitmap scans. There are only three false positives to discard after the index scan.īitmap scan works on table pages. > Bitmap Index Scan on words_word_trgm (actual time=0.854.0.854 rows=9 loops=1) ![]() Recheck Cond: (word ~~ 're%olution'::text) Select word from words where word like 're%olution' īitmap Heap Scan on words (actual time=0.872.0.879 rows=6 loops=1) Index Cond: ((word >= 'data'::text) AND (word = '-'::text) AND (word = '-PH'::text) AND (upper(word) = '-ph'::text) AND (upper(word) = 'msi'::text) AND (reverse(word) explain (analyze, costs off, summary off) Index Only Scan using words_word on words (actual time=6.632.6.643 rows=28 loops=1) Select word from words where word like 'data%' yugabyte=# explain (analyze, costs off, summary off) However, for range queries, the sharding must be done by range of value, which must be defined with an explicit ASC or DESC because hash sharding modifies the order and a Seq Scan would be the only solution. The default sharding method with YugabyteDB applies a hash function on the first column of the index which allows YugabyteDB to distribute and provide scalable point queries. YugabyteDB re-uses PostgreSQL for the query layer, with additional sharding options to distribute and replicate for scalability and high availability. In PostgreSQL, the asc option is not mandatory because it’s the default. yugabyte=# create index words_word on words ( word asc ) If you know the prefix, indexing for LIKE is easy because PostgreSQL can transform it to a range scan an ascending or descending index provides fast and scalable access. Only some details about the storage implementation are different in the execution plan. The examples provided here work the same on the PostgreSQL database. Please note that I will run the demos on YugabyteDB, which is PostgreSQL-compatible. Yugabyte=# \copy words(word) from '/usr/share/dict/words' Id bigint generated always as identity primary key I’ll use a simple dataset, the Linux dictionary of English words installed in the dict package: yugabyte=# \! sudo dnf install -y words Let’s take a look to see how, for situations where the wildcard is either in front or at the end of the pattern. With the LIKE operator, you can compare a string to a pattern that includes some wildcards and then index for these access patterns. ![]() Axon hillock: Once a signal is received by the dendrite, it then travels to the cell body.There is a small gap between two synapsed neurons, where neurotransmitters are released from one neuron to pass the signal to the next neuron. Synapses: Dendrites receive signals from other neurons at specialized junctions called synapses.Dendrites can have small protrusions called dendritic spines, which further increase surface area for possible connections with other neurons. Some types of neurons do not have any dendrites, some types of neurons have multiple dendrites. Dendrites: are tree-like structures that extend away from the cell body to receive neurotransmitters from other neurons.Neurons also contain unique structures, dendrites and axons, for receiving and sending the electrical signals that make neuronal communication possible: Like other cells, each neuron has a cell body (or soma) that contains a nucleus and other cellular components. Neurotransmitters are chemical messengers which are released from one neuron as a result of an action potential they cause a rapid, temporary change in the membrane potential of the adjacent neuron to initiate an action potential in that neuron. An action potential is a rapid, temporary change in membrane potential (electrical charge), and it is caused by sodium rushing to a neuron and potassium rushing out. The electrical signals are action potentials, which transmit the information from one of a neuron to the other the chemical signals are neurotransmitters, which transmit the information from one neuron to the next. Neurons communicate via both electrical signals and chemical signals. ![]() Recent evidence suggests that glia may also assist in some of the signaling functions of neurons. Glia can be compared to the workers at the electric company who make sure wires go to the right places, maintain the wires, and take down wires that are broken. ![]() A neuron can be compared to an electrical wire: it transmits a signal from one place to another. All Khan Academy content is available for free at The nervous system is made up of neurons, the specialized cells that can receive and transmit chemical or electrical signals, and glia, the cells that provide support functions for the neurons. The information below was adapted from OpenStax Biology 35.1 and Khan Academy AP Biology The neuron and nervous system. Describe the structure and function of neuronal synapses and the role of neurotransmitters at the synapse.Interpret an action potential graph and explain the molecular mechanisms underlying each step of the action potential.Describe the structure and function of neurons. ![]() If you choose to do business with this business, please let the business know that you contacted BBB for a BBB Business Profile.Īs a matter of policy, BBB does not endorse any product, service or business. BBB Business Profiles are subject to change at any time. Car rental companies In Los Angeles Airport you can find the following car. Book a car with Avis and Budget through Alaska Airlines. Expedia joins 55+ global suppliers like Enterprise, Hertz, Avis, Budget. ![]() ![]() 7777 NE Airport Way, Portland, OR 97218 Budget Car & Truck Rental. Does Budget have a car rental location at the airport: Portland airport. 9445 NE Airport Way, Portland, OR 97220 Hertz. When considering complaint information, please take into account the company's size and volume of transactions, and understand that the nature of complaints and a firm's responses to them are often more important than the number of complaints.īBB Business Profiles generally cover a three-year reporting period. Find cheap deals on airport car rentals when you book your rental car with Alaska Airlines. Budget Car Rental Pick-up and drop-off Same as pick-up Pick-up date Drop-off date Pick-up time Drop-off time Include AARP member rates Membership is required and verified at pick-up. The average flight time between Portland Intl. However, BBB does not verify the accuracy of information provided by third parties, and does not guarantee the accuracy of any information in Business Profiles. BBB asks third parties who publish complaints, reviews and/or responses on this website to affirm that the information provided is accurate. BBB Business Profiles may not be reproduced for sales or promotional purposes.īBB Business Profiles are provided solely to assist you in exercising your own best judgment. ![]() Vegas led for good when Carrier scored 3:41 into the game after a puck poked from behind the net in the vicinity of three Dallas players. But Benn already had a minus-2 rating without a shot after playing only 3:46 in the first period, and finished minus-2 with only one shot his 12½ minutes on the ice. The Stars got captain Jamie Benn back after his two-game suspension for a cross-check to the neck area of Vegas captain Mark Stone early in Game 3. “You just expect more from yourself in a game like this,” said Stars forward Joe Pavelski, the 38-year-old veteran still without a Stanley Cup after 17 seasons. It was the most lopsided playoff loss for the Stars since the franchise moved south from Minnesota before the 1993-94 season. To reach the potential they believe they’re capable of, they’ll need far more.Instead of having to face a do-or-die Game 7 at home against the Stars, coach Bruce Cassidy and the Knights got off to another fast start and never left any doubt about the outcome of this series that included three overtime games. Sunday, the Cowboys edged out a win against a far less talented team. Don’t assume the more talented team will always reach victory. The team would also be wise to revisit a message head coach Mike McCarthy emphasized in team meetings this week, via a video clip featuring mouse and cheese. Instead, they’re hanging on at 11%.ĭallas will have much to take away from this game, including how Houston’s defense managed to get hands on 11 Dak Prescott passes. A loss to the Texans paired with an Eagles victory would have dropped their odds to a mere 3%. Dallas entered the day with an 18% chance at the division title, and thus a guaranteed home playoff game, per The New York Times’ NFL playoff simulator. The stakes the Cowboys nearly fumbled away were deceptively high. Dallas’ defense mounted a goal-line stand, before the offense marched 98 yards in 2 minutes, 39 seconds. Prescott, hit by a rusher on his right side, threw a costly interception that set up Houston with first-and-goal from the 4. Only in the fourth quarter did the Cowboys' defense bail them out. The Texans soon improved to 17 points off turnovers with a 54-yard field goal. They made it 27 before turning the ball over on downs. The Cowboys' offense needed to advance 28 yards to retake the lead. Safety Donovan Wilson stripped Pierce as he slammed him to the ground, cornerback Trevon Diggs, Dallas’ one starting corner who has not suffered a season-ending injury, recovering the loose ball and returning it 17 yards. Two Cowboys turnovers, two touchdowns off the miscues for Houston, who took a 20-17 lead into the third quarter.ĭallas’ defense tried to turn the tables. This time, Houston receiver Amari Rodgers - who had not scored in 27 career games prior when he was with the Green Bay Packers - caught a 28-yard touchdown from Jeff Driskel, the Texans’ apparent red zone quarterback on Sunday. Prescott’s pass bounced off the fingertips of Brown before landing in the hands of Texans cornerback Tremon Smith. ![]() In the second quarter, an erratic day for the Cowboys’ passing game was on full display. Six plays later, Houston’s talented rookie running back Dameon Pierce burst up the middle for the score. The Cowboys would probably describe their play as sloppy.īecause Cowboys returner KaVontae Turpin muffed a fair catch on a punt in the first quarter to gift the Texans a short field. Even as they rested their top cornerback and top two receivers, they were more effective most of the day. (Photo by Tom Pennington/Getty Images)īut lest a fan just tuned in for that drive, let’s be clear: The Cowboys, and particularly its offense, did not resemble that well-oiled machine vs. Dak Prescott (4), Ezekiel Elliott and the Dallas Cowboys mounted an impressive 98-yard drive late to avoid embarrassment against the Houston Texans. ![]() new versions of APT packages becoming available, causing differing package versions to get installed on production).ĭocker solves a lot of these problems. Or, in a deployment scenario, where I have to worry about external sources being unavailable (APT repositories, GitHub, ) or dependencies mutating between development testing and deployment time (e.g. ![]() Or when I come back to a project months later and hit a red status due to a piece of the playbook now being broken. Well, it’s satisfying unless I’m in a hurry and don’t want to wait 10+ minutes for all the machines to get provisioned. There’s just something so satisfying about typing vagrant up and watching machines get spun up by Vagrant, and then seeing the green Ansible statuses slowly scroll by as the playbooks install the necessary software and libraries to run my code. Eventually, after getting sick of the slowness of virtual machines (Vagrant’s default provider is VirtualBox), I switched to the excellent vagrant-lxc plugin, which allowed Vagrant to provision lightweight Linux containers ( LXC) instead of VMs. Until recently I had been pretty happy with my development provisioning setup, which consisted of Vagrant for spinning up development machines and Ansible playbooks for provisioning the software I needed installed on them. I’ve spent the last several weeks learning Docker and porting a Rails project’s development environment from Ansible provisioning to Docker, so I thought I’d share my experiences so far. If you’re like me, you’ve probably been hearing a lot about Docker over the past year but haven’t really gotten past the “hello world” tutorial because you haven’t found a good way to integrate it into your development workflow or staging/production deployment process. An example Vagrantfile using the Docker provider.Rails Development Using Docker and Vagrant Zell Williams, Ryan Causey, Lisa Takeuchi Cullen, Lisa Takeuchi Cullen, Margaret Rose Lester, Roger Garrett, Kathy Ebel, Kathy Ebel, Stephen Belber, Stephen Belber, Ruth Fletcher, Ruth Fletcher, Christos N. ![]() Burke, Nick Kendrick, Nick Kendrick, Nick Kendrick, Joshua Kotcheff, Joshua Kotcheff, Speed Weed, Robin Veith, Robin Veith, A. Torres, David Matthews, David Matthews, David Matthews, Gavin Harris, Candice Sanchez McFarlane, Candice Sanchez McFarlane, Candice Sanchez McFarlane, Candice Sanchez McFarlane, Robert Palm, Robert Palm, Robert Palm, David J. Parker, Barbie Kligman, Barbie Kligman, Barbie Kligman, Barbie Kligman, Robert Nathan, Robert Nathan, Christine M. Chernuchin, Peter Blauner, Peter Blauner, Peter Blauner, Nolan Dunbar, Nolan Dunbar, Melody Cooper, Melody Cooper, Patrick Harbinson, Patrick Harbinson, Ed Zuckerman, Ed Zuckerman, Ed Zuckerman, John Chambers, John Chambers, Daniel Truly, Daniel Truly, Bryan Goluboff, Bryan Goluboff, Bryan Goluboff, Allison Intrieri, Allison Intrieri, John Paul Roche, John Paul Roche, John Paul Roche, Rick Eid, Richard Sweren, Richard Sweren, David Graziano, David Graziano, David Graziano, Lawrence Kaplow, Lawrence Kaplow, Jeff Eckerle, Jeff Eckerle, Jill Abbinanti, Jill Abbinanti, Jill Abbinanti, Samantha Corbin-Miller, Samantha Corbin-Miller, Samantha Corbin-Miller, Neal Baer, Neal Baer, Neal Baer, Neal Baer, Jose Molina, Jose Molina, Jose Molina, Ken Storer, Mick Betancourt, Paul Grellong, Matt Klypka, Matt Klypka, Michael R. Campbell, Michele Fazekas, Michele Fazekas, Michele Fazekas, Michele Fazekas, Wendy West, Wendy West, Wendy West, Wendy West, Tara Butters, Tara Butters, Tara Butters, Tara Butters, Elizabeth Rinehart, Elizabeth Rinehart, Michael S. Robinson, Jonathan Greene, Jonathan Greene, Jonathan Greene, Jonathan Greene, Jonathan Greene, Kathy Dobie, Kathy Dobie, Kathy Dobie, Kathy Dobie, Kathy Dobie, Monet Hurst-Mendoza, Monet Hurst-Mendoza, Monet Hurst-Mendoza, Monet Hurst-Mendoza, Monet Hurst-Mendoza, Denis Hamill, Denis Hamill, Denis Hamill, Denis Hamill, Denis Hamill, Lisa Marie Petersen, Lisa Marie Petersen, Lisa Marie Petersen, Lisa Marie Petersen, Lisa Marie Petersen, Brendan Feeney, Brendan Feeney, Brendan Feeney, Brendan Feeney, Amanda Green, Amanda Green, Amanda Green, Amanda Green, Amanda Green, Micharne Cloughley, Micharne Cloughley, Micharne Cloughley, Micharne Cloughley, Judi McCreary, Judi McCreary, Judi McCreary, Judi McCreary, Kevin Fox, Kevin Fox, Kevin Fox, Robert F. Written by | Dick Wolf, Dick Wolf, Dick Wolf, Julie Martin, Julie Martin, Julie Martin, Julie Martin, Warren Leight, Warren Leight, Warren Leight, Warren Leight, Brianna Yellen, Brianna Yellen, Brianna Yellen, Brianna Yellen, Brianna Yellen, Dawn DeNoon, Dawn DeNoon, Dawn DeNoon, Dawn DeNoon, Dawn DeNoon, Robert Brooks Cohen, Robert Brooks Cohen, Robert Brooks Cohen, Robert Brooks Cohen, Robert Brooks Cohen, Céline C. Marquardt, Jono Oliver, Christopher Misiano, Leslie Hope, Lesli Linka Glatter, Rick Rosenthal, Stephen Wertimer, James Quinn, Ed Bianchi, Matt Earl Beesley, George Pattison, Eriq La Salle, Kate Woods, Christopher Zalla, Tom DiCillo, Courtney Hunt, Rosemary Rodriguez, Peter Werner, Laura Belsey, Jennifer Getzinger, Nick Gomez, Sharat Raju, Timothy Busfield, Bethany Rooney, Oscar Rene Lozoya II, Clark Johnson, David Hugh Jones, Peter Medak, Alexander Cassini, Elodie Keene, Alan Metzger, Edwin Sherin, Michael Zinberg, Henry Bronchtein, Gloria Muzio, Joyce Chopra, Darnell Martin, Guy Norman Bee, Chad Lowe, Daniel Sackheim, Félix Enríquez Alcalá, Marita Grabiak, James Hayman, Michelle MacLaren, Paul McCrane, Yelena Lanskaya, Chris Eyre, Paul Black, Amy Redford, Patrick Creadon, Kevin Bray, Alik Sakharov, Jonathan Starch, Tricia Brock, Monica Raymund, Lucy Liu, Ray McKinnon, Laurie Collyer, John Behring, David Grossman, Mary Lambert, Pratibha Parmar, Patricia Riggen ![]() Forney, Martha Mitchell, Michael Pressman, Steve Shill, Michael Slovis, Alex Zakrzewski, Helen Shaver, Michael Smith, Jonathan Kaplan, Mariska Hargitay, Ted Kotcheff, Fred Berner, Jonathan Herron, Richard Dobbs, Jud Taylor, Holly Dale, Adam Bernstein, Batan Silva, Michael Fields, Rick Wallace, Jim McKay, Donna Deitch, Aaron Lipstadt, Stephanie A. Directed by | David Platt, Jean de Segonzac, Peter Leto, Alex Chapple, Juan José Campanella, Constantine Makris, Norberto Barba, Arthur W. |
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