My wife bought one of these gadgets so I read this thread with great interest. It's hard to hit something you cannot see, and just as hard to avoid hitting things you cannot see. Also, during daytime chances are you would not even notice the aircraft being there, or even be able to see it at all. A pilot in an airliner 35.000 feet up might be able to see your 1 watt green if accidentily pointed in its direction, but the illumination would be well beyond what would be considered seriously distracting. The lux (as in lm/m2) numbers make sense to me: 100 is about the brightness in a poorly lit hallway, 1000 is what you get outside on an overcast day. The burden of proof would however be with prosecution in such cases, and given the divergence of a typical laser pointer that treshold would not be reached unless standing on end of the runway. It would be perfectly reasonable to say that it should be illegal to illuminate aircraft under 10.000 ft with over 100 lux during nighttime or 1000 lux during daytime from the ground. That said i can see the reasoning behind making it illegal to point lights of any sort at aircraft, but make the criterium of what is a violation perfectly clear. A big xenon-short-arc searchlight would be just as distracting and even dangerous as any laser pointer. In all honesty there is no real difference in distraction or eye damage that depends on the source. The primary error in legislation is that it is specific to lasers. ^^^ some misconceptions but basically accurate With ~70,000 attendees catching this person IIRC failed.ītw she has a 'fund me' if you want to help her. So she took the one in millions shot to the eyes She was intentionally looking at the laser trying to find the jerkwad who had been shinning it a LOT at people eyes then running off. I hope the docs were wrong and she healed better. That is how BM Ranger Kelli lost an eye-last year You odds are better to hit the lotto or get struck by lightning than getting really blinded by a 100mw greenīut only if the beam hits the center of your eye's lens will it make a burn I do see a problem with the laser showersīUT some may take that and apply it to a more dangerous laser MEĪnyway dog, you can see the beam stops way before the plane so- no harm. My hommies took my greenie and they did it NOT. Undoubtably we have members here who have lased aircraft once or moreĪnd some who will do it again- after all they did not get caught and the plane did not burst into flames- its a prank right? Showing the pics of a retinal burn as well can balance this out Lighting a match shows the power but can give some bad ideas IF any of you do this- be careful about what you say- and show There is NO way to lessen the attraction humans have with lights of all kinds beginning of course with FIRE Offer to loan some of yours or come to talk to the class Reach out to the nearest Science HS teacher and just have a chatĪsk about the teacher's classes about lasers. Teachers and parents must share in the blame if that game is being played.ĭo the Science teachers know whats going on?ĪLL TEACHERS need to teach even pre school about laser danger Have any members really made sure no laser or even parts were sold to some minor with BAD IDEAS or ADULT FOR THAT MATTER. We all can do more and I am not talking about posts here. by now I would think somebody is actively going to do what the FAA and TSA are not. Where are the evening (laser dont do well at noon) patrols looking for lasers and hearing from the actual pilots when the incident is on-going The TSA has a zillion workers feeling us up and scanning us. To me sometimes i think they do NOT want to do the things that will help? TERRIBLE distraction upon landing or take-off- any disruption of the chunking prosess is extremely dangerous -ĪTM around 12 reports per day in USA of lasers on aircraft -they do afaik still reports all sighting except there is a seperation between the two. Those reporting 'injuries' remind me of people in minor car accidents who climb out of the car crying about neck/back pain (trannslation-PAYDAY)Īll this does NO GOOD for the REAL problem. THEN I think they were required to report ALL laser sightings- and that IMO is worthless data and totally skews the facts/stats Then the FAA iirc made it manditory to report lasers AIMED at them- and as lasers became so much more popular those numbers rose nearly every year BTW the huge spike in laser on aircraft incidents is due to IMHO several factors including Ben's comment on the laser hatersĪt one point in time here pilots had no specific rule to report getting lased or just seeing a laser from the air ( A HUGE diff imho)
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Rename /etc/ssl/cert.pem to something else. Even though my systems have a newer version of OpenSSL installed using homebrew and/or MacPorts, the system-wide OpenSSL pem file located at /etc/ssl/cert.pem was out of date and did not include the ISRG Root X1 certificate. pem file containing its root certificates. OpenSSL on macOS does not use the system keychain (which makes sense as it's a cross platform library) but rather has its own. Small addendum: the open source app is using OpenSSL 1.1.1j. I'm not sure what library the app is using for https - it may be libcurl, but I suspect it's failing for the same reason curl is. What do I need to do to fix this? I can't just use insecure mode on curl as the issue I'm trying to fix is the app that can't access the site. However, the app in question still fails, as does curl. I've confirmed that the ISRG Root X1 certificate is installed in Keychain Access and is trusted.įurther, I can access the site using Safari or any other web browser. * SSL certificate problem: certificate has expiredĬurl: (60) SSL certificate problem: certificate has expiredĬurl performs SSL certificate verification by default. * TLSv1.2 (OUT), TLS alert, Server hello (2): * TLSv1.2 (IN), TLS handshake, Certificate (11): * TLSv1.2 (IN), TLS handshake, Server hello (2): * TLSv1.2 (OUT), TLS handshake, Client hello (1): * Cipher selection: successfully set certificate verify locations: * Connected to hostname (x.x.x.x) port 443 (#0) Here's the output of curl -vv with the hostname and IP address redacted: * Rebuilt URL to: * Trying x.x.x.x. If I use curl to access the same site, it also gets an error about the certificate being expired. An open source app running on my macOS 10.13.6 and 10.14.6 system is failing to access a website via https that uses a Let's Encrypt certificate. Although the uses of such an operating system are limited, you can play a few classic games such as s Shufflepuck Cafe or Dungeon Of Doom. Once the operating system has booted, you can press the menu button on your phone and tap “scale” for a full screen experience.Ĭongratulations! You are now running an ancient version of the Mac OS on your Android device. Step 4) – Open the Mini vMac.apk from your App Drawer, then press the menu button on your phone and tap “Insert Disk.” Once you have done this tap on “896K” to boot the Mac Plus operating system. With the minivmac folder created on your device’s SD card you will want to extract the Mac Plus files to it. Step 3) – Using a file manager application of your choice, navigate to the SD card on the device and create a new folder called “ minivmac“. Step 2) – Next download the Mac Plus OS by clicking here. It is compatible with almost any Android device running version 1.5 or higher. Step 1) – The first thing you will need to do is download Mini vMac to your Android device from the Google Play Store by clicking here. As such, for the purpose of this tutorial you will learn how to install the Mac Plus OS on your Android device. For those of you who would like to take a trip down memory lane and play around with the old operating system though, you are in luck… if you have an Android device.Ī developer has managed to port an emulator by the name of Mini vMac to Android that allows you to emulate almost any prehistoric version of the Macintosh OS. Nowadays such an operating system wouldn’t be bearable however, because of what we are used to with Mac OS X Mountain Lion. The operating the Macintosh Plus ran was sophisticated at the time, and served its purpose. It had a starting price tag of $2599 and came with 1MB of RAM and an SCSI port. (AppleTalk is the protocols that are used to talk over the LocalTalk network hardware. Mac OS 9.2 | Mac OS 9.2.1 | Mac OS 9.2.For those of you who haven’t studied your Apple history, the Macintosh Plus was the third model in the Macintosh line that was initially released on January 16th, 1986. The standard Mini vMac variation without LocalTalk emulation still tries to correctly emulate the serial port, with no LocalTalk network attached, which is sufficient for turning on AppleTalk. Understanding Mac OS 9.2, the Classic Environment, and Classic Applications at eTutorials.ARCHIVED: In Mac OS X, what is the Classic environment, and how do I activate it? at Indiana University.↑ 6.0 6.1 Low End Mac’s Compleat* Guide to Mac OS 9 by Charles W.↑ Mac OS 9.1 to be 'Classic' environment in OS X by Dennis Sellers, Macworld.↑ Mac OS X Public Beta Review by Jason Buck, MacOpz.↑ Mac OS X Beta not worth installing for most users by Henry Norr, Tampa Bay Times.↑ Mac OS X - Technologies: Elegant Power., Apple Computer.↑ Mac OS X: Codename “Jaguar”, Apple Computer.Alternatives for modern versions of macOS include emulators such as Basilisk II, Mini vMac, QEMU, and SheepShaver. Mac OS X 10.5, which was part of the Intel transition, dropped support for classic applications entirely. Mac OS X 10.4.11 was the last version to support the Classic environment, which was an optional installation item with Mac OS 9.2.2. About Mini vMac and all other 68k emulators, including SoftMac, Executor, and MESS. When the first retail version of Mac OS X 10.0 was released in March 2001, the minimum version of classic Mac OS to be supported was 9.1, which was included as part of the installation. Another transition technology called Carbon was also introduced, which allowed applications which took advantage of the API to run on both Mac OS 9 and PowerPC versions of Mac OS X. Stability was inconsistent and improved with successive public beta releases. Any problematic legacy program that would normally cause Mac OS 9 to crash could be contained and only require relaunching of the Classic environment without bringing down the main system.ĭuring beta testing of Mac OS X, the minimum version of classic Mac OS to be supported was 9.0.4, which needed to be installed separately. During its early development under the code name Rhapsody, a proof-of-concept called " Blue box" demonstrated that backward compatibility could be provided through a native application that would run the older software in a sandbox environment. Mac OS X is based on NeXTSTEP, which uses a Unix-based kernel that is inherently incompatible with classic Mac applications. I'm choosing to use summarize_at instead of summarize and across because the specification of na.rm = TRUE as a separate argument to the across function is deprecated. Here's what my final function looks like after implementing their framework. Thanks to deschen for the solution using map2 from purrr to wrap the summarize call. I'm trying to avoid using for loops to keep this code compact and readable. Key R functions and packages The dplyr package v> 1.0.0 is required. before = Ozone) %>%Īny suggestions are greatly appreciated. This article describes how to compute summary statistics, such as mean, sd, quantiles, across multiple numeric columns. I'm using the built in R dataset "airquality" library(dplyr)ĭplyr::mutate(time = time_series. Here are some inputs and reproducible code to test with. # Set column names and delete extraneous columns created by the summarize functionĭplyr::summarize(dplyr::across(.cols = dplyr::all_of(variable_names), Here is a simple example of my current code: aggregate_func %ĭplyr::mutate(hour = lubridate::floor_date(time, "hour")) %>%ĭplyr::summarize_at(.vars = variable_names, I'm worried about the performance impact all these unnecessary computations will have. So far I have lived with this and just trimmed out the extra columns, but this function is going to be used on very large datasets (down to minute-by-minute interval data over multiple years) with a potentially large number of independent variables. For the example above, this means sum would be applied to all 4 columns, as would median, mean, and sd, resulting in 16 columns. When dplyr's summarize function is provided a list of variables and functions, it will apply every function to every column, squaring the total number of output columns. For example, if we have four independent variable columns, Ozone, Solar.R, Wind, and Temp, then the list of functions c(sum, median, mean, sd) would have Ozone aggregated by sum, Solar.R by median, Wind by mean, and Temp by standard deviation. The intention is that each function is only applied to the column it matches the order of. The number of functions should match the number of independent variable columns in the input dataframe and be in an order that corresponds to the order of columns to apply the functions over. This is an argument to my function called variable_aggregation which is a vector of functions like c(sum, median, mean, sd). I want the user to be able to specify which functions are going to be used to aggregate data. For example, of those who are college graduates, how many are stem So far I have something like this. How do I go about calculating the proportion of a response for a certain subset of a data set. The input dataframe to my function has a time column and one or more independent variable columns. tidyverse dplyr xbechtel September 30, 2020, 3:16am 1 Hello I am very new to R. I am currently using dplyr and lubridate to accomplish this. For example, we would to apply n_distinct() to species, island, and sex, we would write across(c(species, island, sex), n_distinct) in the summarise parentheses.I am writing a function right now that will aggregate (roll up) data at short time intervals up to longer time intervals. n_distinct() in the example above, this external function is placed in the. When dplyr functions involve external functions that you’re applying to columns e.g. cols specifies the columns that you want the dplyr function to act on. It is used inside your favourite dplyr function and the syntax is across(.cols. Wouldn’t it be nice if we could just write which columns we want to apply n_distinct() to, and then specify n_distinct() once, rather than having to apply n_distinct to each column separately? Ordinarily, if we want to summarise a single column, such as species, by calculating the number of distinct entries (using n_distinct()) it contains, we would typically writeĭistinct_species distinct_island distinct_sex The new across() function turns all dplyr functions into “scoped” versions of themselves, which means you can specify multiple columns that your dplyr function will apply to. The first two columns, species and island, specify the species and island of the penguin, the next four specify numeric traits about the penguin, including the bill and flipper length, the bill depth and the body mass. There are 344 rows in the penguins dataset, one for each penguin, and 7 columns. # … with 334 more rows, and abbreviated variable names ¹flipper_length_mm, Species island bill_length_mm bill_depth_mm flipper_…¹ body_…² sex year And some of them follow standard phonetic patterns while others don’t. For example, like, the, it, etc., are all high-frequency words. High-frequency words, as the name suggests, are the most commonly found words in our written language. While the terms sight words and high-frequency words are often used interchangeably, there are some key differences. Are Sight Words Just High-Frequency Words? Here is a list of the 45 sight words we include in our HOMER reading pathway:Īnd, a, the, on, is, to, I, was, you, your, yes, no, do, they, with, that, are, said, girl, boy, were, this, look, like, want, has, of, what, see, go, play, here, very, good, his, her, there, where, have, walk, talk, know, blue, green, little. For instance, the pre-primer list includes you, said, and where. Some of the 315 words that comprise the two lists are very easy for kids to learn: a, I, it. The words are broken down by levels: pre-primer, primer, first grade, second grade, and third grade. He identified 220 “service words” and 95 nouns. What Words Should You Use For Sight Word Games?ĭecades ago, an educator named Edward Dolch developed a list, used widely by teachers, of the words most frequently used in children’s books. But before we get to these fun activities, let’s be clear on the specific sight words your child will need to be familiar with. For your child, the games are lots of fun, so they can learn without even realizing it. For you, a majority of the activities require minimal supplies and prep time, which is great for a busy parent. And these activities are great for both you and your child. That’s where sight word games come in! We’ve compiled a list of fun activities that you can do with your young reader to help them learn sight words. But early readers who are learning the rules of the English language need a little help. Our reading of these words happens automatically, and that’s what helps us read fluently. We also don’t consider why was and has or have and gave don’t rhyme. As adults who learned to read many years ago, we don’t think twice about why we pronounce sight words the way we do. Why doesn’t the word was rhyme with has? Why doesn’t have rhyme with gave? The first of each is phonetically irregular, despite the fact that they’re some of the most common words in the English language. Discover sight words through tactile games to get your child’s senses engaged.Sight words are words that occur very frequently in English and can be hard to sound out, such as: said, and, the.Learning to read sight words is a key Core Skill, one of the 5 C’s at the heart of the Begin Approach.Sight words are dually helpful in this way: they help your child instantly recognize familiar words and help them bypass trying to sound them out because, phonetically, they often don’t make much sense! The Short Cut And once your child learns basic sight words they won’t need to spend a lot of time trying to decipher these high-frequency words. These words occur so frequently that readers, including very young readers, need to know them instantly. Sight words aren’t easy to sound out or decode, especially for young readers who are just learning the rules, so we memorize them (in other words, recognize them by sight). Even the simplest text would become grueling to read.Ĭommon words in the English language (like the) are often grouped together as sight words in the early stages of reading. Imagine pausing every time you ran across this word in a book, on a poster, or in a magazine. What’s the most common word in the English language? It’s the. Whether you're an aspiring DJ or a veteran, VirtualDJ is all you need to get the party started. Anyway, it comes at a great price as it offers a lot more features. It’s not free, but if you were using the Pro 1-2 until now, you will only have to upgrade it for 49. With the most comprehensive feature list of all DJ software, VirtualDJ always innovates with new technology to change and revolutionize the way DJs mix. The Traktor Pro 3 DJ software is available for Mac and is one of the best pieces of DJ software on the market. 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