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Mon Sep 09 12:26:28 GMT 2024
From /weblog/photographic/tutorial
星軌拍攝技巧 數問 - 1).數碼機因hot pixel而唔適合曝得耐...最好分開影影夠幾個鐘...咁每張間隔之間都要俾CMOS斗下氣？ 有師兄 教過 分十幾張 每張 10-20min 再合成 好過 一野 暴 幾粒鐘, (菲林 令計) 2).數碼機有D人話用ISO 100、有人話用ISO 400-800好...如果用合成方法...其實係咪都係就番光害而定...定係關雜訊事？ 睇天氣 , 小弟 用 o個次 用 iso 100 5).北極星仰角澳門係23度，咁香港一樣？？ 4季 都唔同 位置, 用星座 搵 會準確 d, e+ 係 冬季, 北極星 位置 係 獵戶座 (lei 個最易 認, 唔會 搵唔倒 ... ) 頭頂 (腰帶 致 頭頂 距離 再過 5倍左右) 附圖 係 舊年 去雲南 香格里拉 時影, 本泥想 長暴, 不過 o個晚 太涷 個人 頂唔順 要收皮 反酒店 http://www.dchome.net/viewthread.php?tid=798154 With a lot of information, 香港的星空 — 觀測及拍攝資訊 - http://www.dcfever.com/column/read.php?id=1829 Herman's articles at dcfever - http://www.dcfever.com/column/info.php?id=185 500px tutorial - http://500px.com/blog/738/tutorial-photograph-the-night-sky About Comet - http://www.dcfever.com/column/read.php?id=2193 Atmospheric optical phenomena 大氣光學現象 - http://matthew-chin.blogspot.hk[..]16/06/atmospheric-optical-phenomena.html Stars & Night Sky - http://www.mikkolagerstedt.com[..]top-5-tips-to-photograph-stars-night-sky ===== 這張是11月15日凌晨拍攝的M42獵戶座星雲, 大埔的光害較嚴重, 所以要加上IDAS V4濾鏡作長時間曝光, 分三段不同時間曝光及作Layer Masking 處理, 把動態範圍拉闊. 在月光的影下算是滿意, 希望之後可以分數晚作10小時以上的曝光並加長每一張frame 的曝光時間 (現在是5分鐘一張), 使到暗位的表現進一步改善. Place: Tai Po Date: 14 Nov, 2013 (UT) Camera: Canon 20Da Lens: Canon EF-600 F4L Mount: Vixen Sphinx with Star Book Filter: IDAS V4 Exposure: 10 sec x 10, 30 sec x 10, 300sec x 26 ISO: 800 Guiding: Borg 60mm telescope, AIS120MM, PHD guiding. Image calibration: Dark x 20 (average) for each exposure, Bias x 16 (Median), Dark subtracted Flat field x 20 (Median) Processing: DSS, PS: layer Mask, Cropped, curve, colour adjusted. http://forum.hkas.org.hk/viewthread.php?tid=8009 ===== http://list25.com[..]resemble-things-found-on-earth/?view=all how-to-find-the-milky-way - http://goldpaintphotography.com[..]om/2015/07/24/how-to-find-the-milky-way/ how-to-capture-sharp-star-photographs - http://www.mikkolagerstedt.com[..]10/how-to-capture-sharp-star-photographs 銀河 - 觀測和拍攝 - http://matthew-chin.blogspot.hk/2016/06/blog-post.html 簡易四步驟處理高清銀河 - http://www.dcfever.com/column/read.php?id=3278 TimeLapse-AfterEffects特效『星流跡影片』-進階 - http://www.dcfever.com/column/read.php?id=3935 500 rule: 11mm: 45.5 seconds 12mm: 41.7 seconds 14mm: 35.7 seconds 16mm: 31.3 seconds 18mm: 27.8 seconds 20mm: 25 seconds 24mm: 20.8 seconds 28mm: 17.9 seconds 35mm: 14.3 seconds 50mm: 10 seconds 85mm: 5.9 seconds http://www.price.com.hk/news.php?sec_id=12&id=7216 How to find constellations: a starter’s guide - http://www.zmescience.com[..]eature-post/starter-guide-constellations http://www.deepskycolors.com[..]ilky-Way-Photo-Concepts-You-May-Wan.html 【星空系列教程】銀河及地景拍攝技巧 https://digiphoto.techbang.com[..]ot-to-ensure-the-star-series-tutorial-on https://digiphoto.techbang.com[..]and-landscape-shooting-techniques-middle Informaton of light pillar - http://www.islandnet.com/~see/weather/eyes/pillars.htm How to take Lightning photos - http://www.dcfever.com/column/read.php?id=2456 How To Master Night Sky Photography - https://www.lightstalking.com/night-sky-photography/ How to Photograph the Northern Lights (Aurora Borealis)? - https://www.mikkolagerstedt.com[..]raph-the-northern-lights-aurora-borealis 4 Easy Steps to Edit Astrophotography in Lightroom - https://www.mikkolagerstedt.com[..]ow-to-edit-astrophotography-in-lightroom Orion and the Aurora: how to photograph these wonders of the winter night sky - https://www.dpreview.com[..]ph-these-wonders-of-the-winter-night-sky What do meteor showers look like? - https://www.zmescience.com[..]ronomy/what-do-meteor-showers-look-like/
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Mon Sep 09 12:17:10 GMT 2024
From /weblog/network
The Invisible Backbone of the Internet: Nearly A Million Miles of Undersea Cables Keep the World Connected — But What Happens If They Break? - https://www.zmescience.com[..]uture/internet-backbone-undersea-cables/
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Sun Sep 01 14:08:50 GMT 2024
From /weblog/learning
http://www.michelemmartin.com[..]stions-for-professional-development.html <- write it down, make it a story, visualize it. http://time.com[..]-that-can-make-you-much-more-impressive/ <- The only change was this semester he presented more enthusiastically, gesturing with his hands and modulating his voice. http://www.forbes.com[..]ing-by-asking-the-right-questions/print/ <- Appreciative inquiry (AI) has two important elements: becoming mindful of the questions we ask and directing those questions toward strengths and positive outcomes. 有趣的是，教授說切忌養大自尊心。她發現，美國加州很多關懷青少年的機構都提倡建立自尊心（Self-Esteem），卻無助吸煙、毒品等問題。因為自尊心由「成功」養大，遇到「失敗」馬上危危乎。它的本質已有比較，要成為自尊心強的人，你就要覺得自己很特別，也比他人強。 要做到「自我關懷」，我們要接受自己會做錯，偶爾偷懶讓自己休息一下，就像對待你身邊的好友。 - http://hk.apple.nextmedia.com[..]om/realtime/supplement/20160419/55001749 As outlined by recent research, it all seems as though confidence doesn't necessarily breed success. Interestingly, the self-reported writing skills of college freshmen has been going up over decades, while actual writing ability has dropped. Students rate themselves much higher in drive to succeed now than two or three decades ago, but the average time they spend studying has dropped meaningfully. - http://traderfeed.blogspot.hk[..]k/2014/03/the-limits-of-self-belief.html 五萬隻鳥蛋的故事告訴我們，即使遇到一些普通如一隻鳥蛋那樣熟悉的事物，我們仍可在當中發掘新的知識，並需要勇氣挑戰舊的假設。 - https://thestandnews.com[..]B4%E4%BD%A0%E7%94%9A%E9%BA%BC-%E4%B8%8B/ Use negative emotion as an catalyst to success - http://traderfeed.blogspot.hk[..]awareness-and-acceptance-in-trading.html It's really true: confidence doesn't come from success alone, but rather from facing failure and moving beyond it. - http://traderfeed.blogspot.hk[..]-most-important-reason-traders-cant.html 但接著某件不尋常的事情發生了。學生「相信」比較聰明的那群老鼠，真的表現比較好。簡直有如魔法。那些「聰明」的老鼠儘管和「笨」的同類沒有差別，表現卻是兩倍優秀。 - https://dq.yam.com/post.php?id=14388 Setbacks are inevitable, here’s your brain’s survival guide to get motivated again - https://www.fastcompany.com[..]val-guide-to-get-motivated-after-setback How to stop assuming the worst in a state of uncertainty - https://www.fastcompany.com[..]ming-the-worst-in-a-state-of-uncertainty Where Does Confidence Come From — And How Do You Build More of It? - https://nicenews.com[..]idence-comes-from-and-how-to-build-more/
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Sun Aug 25 07:25:16 GMT 2024
From /weblog/hack+and+faq
Operation Snippet Pretty-printing floats SELECT (10 / 9)::DECIMAL(15, 3); Copying the schema CREATE TABLE tbl AS FROM example LIMIT 0; Shuffling data FROM example ORDER BY hash(rowid + 42); Specifying types when reading CSVs FROM read_csv('example.csv', types = {'x': 'DECIMAL(15, 3)'}); Updating CSV files in-place COPY (SELECT s FROM 'example.csv') TO 'example.csv'; https://duckdb.org/2024/08/19/duckdb-tricks-part-1.html
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Tue Aug 06 07:37:19 GMT 2024
From /weblog/learning
Positive Professional Development: Insights Into Action - http://www.michelemmartin.com[..]ctblog/2011/07/insights-into-action.html 50 Productive Things To Do to Organize Your Life - http://www.thegeekstuff.com/2011/11/productive-things-todo Pay to you children to teach you - http://cn.wsj.com/big5/20121101/wvh072054.asp?source=rss Tips on say no - http://cn.wsj.com/big5/20140327/lif113140.asp?source=rss the-overthinkers-guide-for-taking-action - https://medium.com[..]ers-guide-for-taking-action-4670ca1f1b6d The first step is never physical. It is entirely mental. The first step is a decision. A decision to commit. A decision to act. - https://medium.com[..]Robot/the-power-of-decision-74f0d8ca78d2 Asking questions is one of the most important habits for innovative thinkers. - https://hackernoon.com[..]e-you-a-better-entrepreneur-70ce98492aed A super simple strategy that can help you beat procrastination, break bad habits, and improve performance—all in just 5 seconds. - https://getpocket.com[..]tem/how-to-change-your-life-in-5-seconds
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Tue Jul 30 13:32:12 GMT 2024
From /weblog/science/animal
Elephants carry their babies for two years, and more astonishing animal pregnancies - https://www.nationalgeographic.com[..]-extremely-diverse-pregnancies-heres-why “Larger animals need more food to keep their bodies fueled,” Manger explains. “The elephant, which can eat several hundred kilograms of low-quality food each day, devotes a lot of time to eating, leaving less time for sleep.” - http://www.zmescience.com[..]gy/animals-ecology/wild-elephants-sleep/ The Elephant Next Door - https://www.nationalgeographic.com[..]ts-behavior-coexistence-survival-feature 100 years of elephants: See how Nat Geo has photographed these iconic creatures - https://www.nationalgeographic.com[..]national-geographic-wildlife-photography Wild elephants solve complex puzzles for food. But can their wits save them? - https://www.zmescience.com[..]e/wild-elephants-complex-puzzles-solver/ What elephants eat — and why they spend so much time eating - https://www.zmescience.com[..]-and-why-they-spend-so-much-time-eating/ The Elephant Next Door - https://www.nationalgeographic.com[..]ts-behavior-coexistence-survival-feature Elephants call each other by name, just like people - https://www.zmescience.com[..]ecology/elephants-call-each-other-names/ Scientists figure out the elephant word for “let’s go” - https://www.zmescience.com[..]-ecology/elephant-communication-go-verb/
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Sat Jul 20 13:51:25 GMT 2024
From /weblog/learning
These 3 Hacks Will Make You Remember More - https://betterhumans.coach.me[..]will-make-you-remember-more-b30a3d9b3136 When trying to memorise new material, it’s easy to assume that the more work you put in, the better you will perform. Yet taking the occasional down time – to do literally nothing – may be exactly what you need. Just dim the lights, sit back, and enjoy 10-15 minutes of quiet contemplation, and you’ll find that your memory of the facts you have just learnt is far better than if you had attempted to use that moment more productively. - http://www.bbc.com[..]effortless-way-to-strengthen-your-memory This one is funny: "Distract yourself. You might feel like you’re being super productive and focused by sticking to your work, but you’re less likely to recall it later." - https://medium.com[..]-and-it-can-actually-be-fun-99a9c9b95d5b https://list25.com[..]proof-techniques-to-enhance-your-memory/ http://www.bbc.com[..]-make-you-smarter?ocid=global_future_rss Drawing something makes it easier to remember than writing it down - https://www.zmescience.com[..]drawing-better-than-writting-memory-0432 http://www.bbc.com[..]s-your-memory-is-stranger-than-you-think Frustrated at forgetting stuff? Some simple tricks could have dramatic positive effects. 1) Walk backwards 2) Do a drawing 3) Do some exercise, but get the timing right 4) Do nothing 5) Take a nap http://www.bbc.com[..]-ways-you-could-become-a-memory-champion In animals, weight training appeared to promote the creation of new neurons in the memory centers of the brain. - https://www.nytimes.com[..]w-weight-training-changes-the-brain.html The method works something like this: you use a familiar environment, such as your home, and walk through the environment associating information (like words or digits) you want to remember with various objects or scenery. In order to recall the digits in the right order, you simply have to do a mental walk through your mind palace. In Lu’s case, he devised an intricate story, and assigned images such as a chair, a king or a horse to two-digit combinations of numbers ranging from “00” to “99.” - https://www.zmescience.com[..]e-but-theres-something-that-comes-close/ Most students take a laptop with them to lectures. But are there times when they might be better off taking a pad and pen? - https://www.bbc.com[..]en-the-best-way-to-take-notes-is-by-hand Use hand for memory - https://publicdomainreview.org/essay/handy-mnemonics “This was because using the device shifted the way that people used their memory to store high-importance versus low-importance information. When people had to remember by themselves, they used their memory capacity to remember the most important information. But when they could use the device, they saved high-importance information into the device and used their own memory for less important information instead,” Dr Gilbert explains. - https://www.zmescience.com[..]e/digital-devices-memory-aides-84634345/ 跟福爾摩斯學記憶法 加拿大團隊用VR打造「記憶公寓」 - https://dq.yam.com/post/15111? The results were intriguing: those who were in the curious exploration mode performed better on the memory test. They correctly recognized more paintings and their associated values. On the other hand, the group in the urgent mode proved better at remembering the paintings with the highest value compared to the people who were scouting the museum. Although they remembered fewer paintings, the total value of the paintings they could remember was about $230 higher than the collection of the 'curious thieves'. - https://www.zmescience.com[..]/?goal=0_3b5aad2288-3363a97685-242734313 4 ways to improve your memory, according to a neuroscientist - https://www.fastcompany.com[..]our-memory-according-to-a-neuroscientist Forgot where you put your keys? A neuroscience professor offers 5 tips to improve your memory - https://www.fastcompany.com[..]sor-offers-3-tips-to-improve-your-memory How can I improve my memory? - https://www.fastcompany.com/91125864/how-can-i-improve-my-memory Strengthen Your Memory With These Simple, Science-Backed Techniques - https://nicenews.com[..]our-memory-with-these-simple-techniques/ 11 Simple Ways to Improve Your Memory - https://getpocket.com[..]em/11-simple-ways-to-improve-your-memory
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Tue Jul 16 13:50:36 GMT 2024
From /weblog/history
http://list25.com[..]ieces-of-egyptian-architecture/?view=all Egypt - http://list25.com[..]t-not-know-about-ancient-egypt/?view=all http://list25.com[..]ight-leave-you-a-bit-surprised/?view=all madagascar - http://list25.com[..]-madagascar-you-might-not-know/?view=all “Our world is moved by the minerals of the Congo,” says Mombilo. “The positive thing I can say is that in all these advanced technologies, you’re talking about the Congo.” - https://www.bbc.com[..]orgotten-mine-that-built-the-atomic-bomb 來自非洲，卻征服全世界的神奇植物「可樂果」 - https://dq.yam.com/post.php?id=12830 King Tut's grandparents were Egypt's royal power couple - https://www.nationalgeographic.com[..]rents-tiye-amenhotep-egypt-royal-couple/ Ebou Janha, 102, is the only surviving veteran of 1 Gambia Regiment, which fought for the British against Japanese troops in then-Burma during the Second World War. - https://www.aljazeera.com[..]f-africas-forgotten-army-gambia-and-wwii Nefertiti was more than just a pretty face - https://www.nationalgeographic.com[..]fertiti-was-more-than-just-a-pretty-face Thonis-Heracleion, Alexandria, Meroë, and Jenne-Jeno were once centers of sophistication and wealth, but their fortunes waned over time. Although their ancient splendors disappeared from sight, archaeology is now revealing their glorious pasts. - https://www.nationalgeographic.com[..]these-four-lost-cities-of-ancient-africa The Lighthouse of Alexandria towered over the port city founded by Alexander the Great. Guiding sailors for centuries, it stood from the third century B.C. until the Middle Ages. - https://www.nationalgeographic.com[..]-brightly-for-more-than-a-thousand-years Thonis-Heracleion, Alexandria, Meroë, and Jenne-Jeno were once centers of sophistication and wealth, but their fortunes waned over time. Although their ancient splendors disappeared from sight, archaeology is now revealing their glorious pasts. - https://www.nationalgeographic.com[..]these-four-lost-cities-of-ancient-africa The 2,300-year-old royal tomb of a Kushite king appears nearly untouched—and submerged in rising groundwater. What’s an archaeologist to do? - https://www.nationalgeographic.com[..]/article/dive-ancient-pyramid-nuri-sudan The deep, long-lasting, and sometimes bizarre symbolism of the Eye of Horus - https://www.zmescience.com[..]s-bizarre-symbolism-of-the-eye-of-horus/ Where did the Queen of Sheba rule—Arabia or Africa? - https://www.nationalgeographic.com[..]cle/where-queen-sheba-rule-arabia-africa How was King Tut’s tomb discovered 100 years ago? Grit and luck - https://www.nationalgeographic.com[..]ered-100-years-ago-grit-and-luck-feature Ancient Egypt gave rise to one of the world's oldest Christian faiths - https://www.nationalgeographic.com[..]rticle/coptic-christianity-ancient-egypt The warriors of this West African kingdom were formidable—and female - https://www.nationalgeographic.com[..]e-story-of-the-women-warriors-of-dahomey The stunning discovery of tutankhamun’s tomb 100 years ago opened a window into egypt’s golden past. Now the world will get a new look at the young pharaoh’s riches. - https://www.nationalgeographic.com[..]ower-of-king-tut-as-never-before-feature Seven days of unwrapping the king - https://www.nationalgeographic.com[..]ys-of-unwrapping-king-tutankhamuns-mummy Mysteries of King Tut: What we still don't know - https://www.nationalgeographic.com[..]ries-of-king-tut-what-we-still-dont-know Ramses II ruled for 70 years and had 100 children. Egypt paid the price. - https://www.nationalgeographic.com[..]gypt-children-pharaoh-ramses-family-tree 世上首座金字塔的設計者：在埃及遇見《神鬼傳奇》中的印和闐 - https://dq.yam.com/post/16141
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