Physics

亨利.穆傑的法國經典小說 +意大利19世紀末最重要的歌劇作曲家賈科莫.普契尼的著名歌劇《波希米亞人》藍本 +法語演唱。 故事：一群年輕人在 從放蕩不羈的青春 步向 肩負責任的成年 之間，如何在缺乏生活保障的情況下，依然追求藝術理想與愛情。 “Scenes of Bohemian Life” is a work by Henri Murger, published in 1851. a collection of loosely related stories, all set in the Latin Quarter of Paris in the 1840s, romanticizing bohemian life in a playful way. 2 operas were later based on the novel and play, *La bohème* by Giacomo Puccini in 1896 and *La bohème* by Ruggero Leoncavallo in 1897. Puccini's became one of the most popular operas of all time, spawning several later works based on the same story. **日期：2026年5月30日(星期六)** **時間：1)食飯:@6:15-7:00pm (可選), 2)音歌劇:@7:30-9:15pm** **地點：香港理工大學** **集合時間及地點：1)理工大學VA樓canteen; 2)賽馬會綜藝館地面層; 電聯** **座位: 自由劃位(本人會於7:30pm先排隊入場為大家獲取好座位)** **主辦單位：法國五月藝術節、理工大學、香港歌劇院** Date: 30 May, 2026 (Saturday) Time: 1) Dinner @6:15-7:00pm; 2) Opera @7:30pm-9:15pm Address: JC Auditorium in Hong Kong Poly University Assemble: 1) canteen in VA Building; 2) G/F of JC Auditorium; by call Seat: 6 people limited (Other audience in event as well) Seating: No seating is set and seats are served on first-come-first-served basis (I will queue up for good seat at 7:30pm for members) Presented by: French May Arts Festival, HK Poly University, Opera Hong Kong MeetUp費用：自由定價價值,(晚餐費另計). 報名：按Attend-> 填寫1)聯絡電話號碼, 2)男/女, 3)你願意付出此次活動費用, 4)一起用餐否?-> 確認入選活動-> 繳費(入帳恆生銀行號碼: 359-366101-882 (NG Y\*\ \*S\*\*\*)/ FPS/PayMe: 97419423)-> 再以閣下電話whatsapp(97419423)以下資料: 1)MeetUp名字, 2)過帳通知書. MeetUp fee: Free pricing as you value, (Dinner price excluded). Join: Click ‘Attend’-> Write down your 1)Contact number, 2)Male/Female, 3)Fee that you would pay for this event, 4)Meal together? -> Get confirmation of being in the event-> Pay to Hang Seng Bank acc: 359-366101-882 (NG Y\*\* S\*\*\*)/ FPS/PayMe: 97419423-> Whatsapp 1)MeetUp name, 2)Payment notification \*\*\*a) Welcome foreigners. Please remark your language if you are foreigner. [歡迎外地本地人一同熱鬧.請外地人指明語言.] \*\*\*b) Participants are required to follow instruction of the venue. [參與者要遵守場地規則,違者則有可能被邀離開.] \*\*\*c) Late comer may be restricted to admit and continue in the activity. [主辦組織不作逾候,逾時者有可能不被參加,請預早抵達.] \*\*\*d) No refund or seat transfer after payment, unless is the cancellation of activity or by our group. [交費後若未能出席參與者,繳款不獲退回及轉讓.(除非活動取消而全數退款).] \*\*\*e) Photos taken by our group during activity will be as record and promotion. [活動如有拍照,以作記錄和宣傳用途.] \*\*\*f) When there are 3 No Show, we have the right to ban you out from our groups. [凡超過3次No Show者,本組有權將該組員移離本群組.]

Date: 30 May 2026 (Sat) Time: 15:30 - 18:00 \*HKT Coordinator: Ming Tou, Alex Au Light Refreshments will be available! This is a **workshop** for Python Data Cleaning. Please bring along your laptop with **Python3 installed with enough battery**! *Winners will get a small prize as an accomplishment **in the next meetup**.* **Due to the university entrance policy, we are currently closed for new university QR code entrance registration. Please feel free to join us by registering yourself under the university entrance counter!** ***Mind the Data Gap*** **This model will be delayed due to: missing values, outliers, and delimiter congestion.** In this hands-on HKPUG workshop, we are turning a Python data cleaning exercise into a gamified team sprint. You will work with a **synthetic Hong Kong-inspired transport dataset**. The data is messy on purpose: missing values, weird outliers, inconsistent categories, URL-encoded station names, confusing delimiters, and fields that look useless until you extract the hidden signal. Your mission is simple: **Clean the data. Extract better features. Run the scorer. Beat the model.** You do not need to tune the model. You need to **rescue the data**. ***How the Challenge Works*** Teams will write a Python data transformation script to clean and enrich the dataset. Our scoring pipeline will then: 1. Run your transformation on the training and test data 2. Remove any label / target leakage columns 3. Train a fixed Gradient Boosting model 4. Evaluate the model using proxy metrics such as F1 and ROC-AUC 5. Convert the result into a data cleaning score This is not meant to be a perfect data quality metric. It is an accessible proxy: if your **cleaning** and **feature extraction** help the **model perform better**, your team gets a better score. **Capacity:** 60 (Team of 4) **Venue Info:** City University of Hong Kong, Kowloon Tong (Exact Location TBC) **Rundown:** **30th May** **15:30 – 15:40** Opening Remarks, Team Formation & GitHub Setup **15:40 – 15:55** Briefing: Data Traffic Report, Challenge Rules & Scoring Pipeline **15:55 – 16:20** Demo: Messy Dataset, Data Cleaning Strategy & `transform.py` **16:20 – 17:10** Team Sprint Part 1: Missing Values, Outliers & Category Cleanup **17:10 – 18:00** Team Sprint Part 2: Feature Extraction, Hidden Signals & Scoring Iterations **18:00 -** Networking outside City University **13th June** **\- 23:59** Winner Team Announcement **Audience pre-requisite:** * **Hardware:** **MUST** bring a laptop with Python 3 installed and a code editor (VS Code, PyCharm, etc.). * **Skills:** Recommended having basic to intermediate-level knowledge of Python (handling JSON, using the `requests` library, and writing basic `if/else/while` loops). **How to join?** 1. Click "Attend" on this page

Join us for a fun and fitness-focused doubles badminton session at Kowloon (TST) Badminton Meetup. Whether you're a beginner looking to improve your skills or a seasoned player seeking some friendly competition, this event is perfect for everyone. Our meetups are designed to combine exercise and recreational sports in a social and engaging environment. Don't worry if you're new to the sport, as our sessions are coached to help you enhance your badminton techniques while having a great time with fellow sports enthusiasts. Meet new friends, improve your game, and stay active on Sunday mornings with us. Come down to the court, unleash your competitive spirit, and enjoy a morning of exciting badminton matches interspersed with friendly banter and sports socials. Cancellation details: The cancellation deadline is 48 hours prior to the start time of the game for weekdays and Wednesday for weekend games. No show or drop out without payment or delayed payment results in a permanent ban. WhatsApp the organizer at 57197742 to confirm your spot. Thanks [https://wa.me/85257197742?text=Join%20sports](https://wa.me/85257197742?text=Join%20sports) We don't count RSVP for attendance; WhatsApp reservations only. Address- Lockhart Road Sports Centre - Arena, 10/F, Lockhart Road Municipal Services Building, 225 Hennessy Road, Wan Chai, HK Time - 7:00 am Event fees - 60$ per person Join our badminton WhatsApp group for future event updates. WhatsApp me at 5 7 1 9 7 7 4 2 to join https://wa.me/85257197742?text=Join%20badminton%20group

*\**\* This event is listed here for information only. Please join **[The 852 on Heylo](https://heylo.group/the852 "https://heylo.group/the852")** **for free** to complete **[your registration](https://heylo.com/invite/EfQoI5Qk "https://www.heylo.com/invite/Li4VDuEF4")**. \*\* Enjoy a fit, social Saturday evening at the largest pickleball venue of our new partner, [212HK](https://www.instagram.com/212hong_kong "https://www.instagram.com/212hong_kong")! Meet new friends, play games, then grab dinner & drinks at happy hour prices! 🥳 Both experienced players and newcomers are welcome—the 212HK coach will bring us up to speed! 📅 Date: Saturday, 30-May ⏰ Time: 5:00 PM 📍 Location: 212HK, 15/F S22 Building, 22 Heung Yi Road, Wong Chuk Hang. Wong Chuk Hang MTR Exit B 🎟️ **Ticket Price** Ticket includes: Entry, 2-hour racket rental, group class coaching, and game time! • Early bird offer ends on 3-May. **Early bird HK$300** \| Standard HK$350 Sign up for membership at [HK$150/month](https://buy.stripe.com/6oU6oH27RbFk6kgghV93y01 "https://buy.stripe.com/6oU6oH27RbFk6kgghV93y01") via the [Stripe link](https://buy.stripe.com/6oU6oH27RbFk6kgghV93y01 "https://buy.stripe.com/6oU6oH27RbFk6kgghV93y01"), and pay HK$150 for this event; check out on [Heylo](https://heylo.com/invite/LHK1RAm4 "https://heylo.com/invite/LHK1RAm4")! Limited capacity – first come, first served! 🏃 Come make new friends with active people and enjoy a fun-filled evening together! 🎁 Get hooked on pickleball? There's a special offer if you want to sign up on the spot! Miss that? Check out the [partner benefits for The 852 members](https://www.heylo.com/benefits/fe9e370b-b33d-4fb6-9175-271b6ad9b401/-Opf_dhI2aBjep6YmXWb "https://www.heylo.com/benefits/fe9e370b-b33d-4fb6-9175-271b6ad9b401/-Opf_dhI2aBjep6YmXWb") on Heylo. \*\*\* Register the event [here](https://heylo.com/invite/KWxoi7aM "https://heylo.com/invite/KWxoi7aM")! \*\*\* ***The 852*** *is a Fitness & Social Community that supports an active lifestyle through monthly membership pricing of HK$150. Members enjoy free weekly outdoor workouts, along with preferential rates or free entry, to select paid events.* Check out the [full schedule](https://heylo.group/the852). 😉 Follow us on [Instagram ](https://www.instagram.com/the852hk/)**[@The852HK](https://www.instagram.com/the852hk/)** [The 852 on Heylo](https://heylo.group/the852) : **https://heylo.group/the852** #The852 #The852HK #Pickleball #ActiveLifestyle #SocialActivity #NewInTown #MakeNewFriends #ExpandYourCircle

When learning statistics, one of the most fundamental yet usually grossed over concepts is that of **variance** (i.e. the square of the standard deviation in normal distribution). As we know, virtually all statistical operations which measure deviations of individual values from the norm involve adding the **SQUARED differences between the two numbers**. However, very few instructors could explain why we have to use squares rather than just the absolute values of the difference (or other even powers such as 4, if the intention is to avoid the negatives). This tutorial shall cover this in a convincing manner. Secondly, while we all know the variance of a SAMPLE is arrived by dividing (n-1) of the sum of squared differences, where n is the number of observations, few can articulate the rationale behind it. This tutorial shall also prove step by step why this is case, so after this you could appreciate the logic behind this ingenious insight instead of just reciting it like a medieval myth.

Hello everyone, Paul here, I'm a French tennis coach, I’m organising a 1-hour tennis session for FULL BEGINNERS at CWB Sport Ground, specifically for those who have never tried tennis before. The lesson will take place on a practice court, which features a half court and a tennis wall. The objective of the class is to learn the two most fundamental tennis strokes: the backhand and forehand. To facilitate learning, we will use a mini tennis net, the tennis wall and various types of balls. (Soft/half soft/normal). Price is 150 HKD per person for 1h Number of players: 3 maximum Place: CWB Sport Ground, next to Tin Hau MTR Station (This is not inside Victoria Park but next to the yellow library, be careful). All players are welcome—both adults and kids! This is a relaxed lesson with no pressure, perfect for anyone looking to try tennis. Please note: * Confirm your RSVP on WhatsApp IN THE NEXT 24H after RSVP: +852 9465 5714 and proceed to the payment. Otherwise you’ll be removed from the RSVP list on Meetup. * Payment will be 100% refundable if you cancel with a good reason at least 24h before or if it is raining. * Here is my FPS number: +852 9465 5714. I also accept cash and Alipay * I will not accept people who are more than 10min late. * What to bring: a cap, comfortable sneakers, and a water bottle. * If you don’t have a racket, just let me know, and I can provide one. * Please be there 10min before. If you are late please let me know. See you on the court, Paul

大家好, 我們誠摯地邀請大家來參加我們的聚會。請大家各自帶一本最近閱讀的書 (中英文也可以, 我們建議文學)，分享您對這本書的想法和感受。這將是一個輕鬆愉快的環境，讓我們一起交流和啟發。 費用: 免費 聚會地址是：上環文咸西街44-46號903室 Whatsapp booking: 4449 0049 Website: https://midnightbliss-studio.com/ IG: midnight_bliss_studio 期待與大家見面。 祝好, Cultural Hub We sincerely invite you to our book club. Please bring a book you've recently read (in Chinese or English, it's fine but we prefer literature), and share your thoughts and feelings about it. This will be a relaxed and enjoyable environment for us to exchange ideas and inspire each other. Fee: Free RSVP Whatsapp booking: 4449 0049 Location: Suite 903, 44-46 Bonham Strand West, Sheung Wan

**Total beginners** **welcome!** A whole new movement, fitness & self defense cultural activity **outdoors!** Structured progressive practices for **Strength**, **Flexibility,** **Coordination** & **Self Defense** skills in a fun group environment! Totally NOT what you expect, **serious cardio**, **whole body movement** & **practical!** You will really be surprised by what WE do but even more by what YOU can do! Nothing like what you imagine about Kung Fu, No screaming, No rigidness, No mysticism & No getting hit… but YES, definitely a fun workout with great people! **Curious?** To get an ideal of what class is like, hear instructor & hear student testimonials go to [https://www.instagram.com/natural.style.kungfu](https://www.instagram.com/natural.style.kungfu) **FEE:** 1st time TRIAL fee of $100 HKD for residents. Please RSVP here or Whatsapp me. Non-Resident $150 HKD. After trial 10 class package is $1500 HKD or $200 HKD single class. **WEAR:** Workout clothing, sports shoes & bring bottle of water! **WHEN:** Sunday 5:45 pm NEW people, 6 pm students. Please be on time, warm up very important for your 1st class! **WHERE:** Inside Kowloon Park. Meet at McDonalds across from Indoor Swimming Pool entrance, next to Sports Center. MTR: Tsim Sha Tsui, Jordan, or Austin. Link below: [Kowloon Park Swimming Pool](https://maps.apple.com/?address=22%20Austin%20Rd,%20Tsim%20Sha%20Tsui,%20Kowloon,%20Hong%20Kong%20SAR,%20China&auid=15054175802527892571&ll=22.301815,114.170365&lsp=9902&q=Kowloon%20Park%20Swimming%20Pool&_ext=CjIKBAgEEAUKBAgFEAMKBQgGEKcBCgQIChAACgQIUhADCgQIVRAQCgQIWRADCgUIpAEQARIkKSODum0jNjZAMWByPQiohFxAORGqqD1gZDZAQaw+9nwmkVxA&t=m) **WHY:** Out of shape? Gym BORING? More? You want to exercise & have fun building strength, flexibility, coordination & self-defense skills while cultivating patience, focus, confidence & yes… discipline! **HOW:** To get in touch with me, Whatsapp .9420.0360. or email through Meetup. For more info about my art, please visit NaturalStyleKungfu.com. **\- Book a Private 1\-on\-1 Kungfu Class\!** Learn at your own pace & prepare for later group classes, choose the day & time suitable to you! Private Class in Kowloon Park: 1.5 Hours $500, other locations $900 **-**

恆常玩pickleball活動，不定期開場，target每場6-8人攤分場錢，人均低至$50/2hrs，包球拍租借，有興趣入嚟先😁 報名方法: **如果你想更深入了解其他會員/優先獲得活動名額及資訊，歡迎填妥[簡單表格](https://forms.gle/VuduPPGrMwCFiY2S9)加入Whatsapp會員限定群組，連結：** https://forms.gle/VuduPPGrMwCFiY2S9 本群（Fun & Positive Hong Kong X L&G）旨在協助大家輕鬆快樂交友，排憂解難，擴闊社交圈子，成為大家繁忙生活中嘅一片可以抖下氣嘅綠洲😉大家等緊你呀！～🤗🥳😉👍 **Your Pal,** **Fun & Positive Hong Kong X L&G Admin Team🥳😎**

Topic to be announced. **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

🎶 Ready for a night of music, laughs, and great company? Join us at Thunderwing Brewing for Music Bingo — a fun twist on classic bingo where songs replace numbers and the good vibes keep flowing! 🎵 Sing along, test your music knowledge, and enjoy a relaxed evening with the group. 📍 Please RSVP to reserve your spot: Text Renee at 614-257-9389 (We need a headcount so the brewery can plan staffing and seating.) 🪑 Arrive early to grab a seat — feel free to bring a camping chair for extra seating. 🍔 Food trucks are often on site, or you’re welcome to bring your own food. 🐶 Bonus: Dogs are welcome, so bring your pup along too! Columbus ski club membership not required for this event. CSC assumes no responsibility for the event or any injuries as this is organized by a third party.

Private Group. Closed to the Public Knowing ourselves and understanding our abilities is the first step toward wielding our gifts with control and accuracy. In subsequent classes we will verify and hone our talents with activities and discussion. These are hands-on workshops and participation is expected. The goal of our series will be to develop expertise in areas of particular interest such as mediumship, channeling, divination, healing and, etc.. Our ultimate directions will be determined by class members as we evolve. I look forward to sharing and discovering with you. - Cynthia

Join us as we get together to see Paul Rudd in the latest comedy-drama-musical from John Carney, POWER BALLAD! The film follows a washed-up wedding singer, a fading boy band singer and a stolen hit song. Here’s a description, trailer and plan for this event: DESCRIPTION: Rick, a washed-up wedding singer, and Danny, a fading boy band star, bond over music and a late-night jam session. When Danny turns Rick's song into a hit, Rick sets out to reclaim the recognition he believes he deserves. Power Ballad is written/directed by John Carney, the master of the modern musical and creative mind behind Once, Begin Again and Sing Street! It stars Paul Rudd, Nick Jonas, Peter McDonald, Marcella Plunkett, Havana Rose Liu and Jack Reynor. BUZZ & ACCLAIM: The film premiered to rave reviews at this year’s Dublin International Film Festival where critics call it “a sure-fired crowd-pleaser” that “just might be the feel-good hit of the year!” Others say, “Paul Rudd delivers a career-best performance in this charmer” that’s both “hilarious and deeply moving." The film continues John Carney’s “long run of success with yet another charmer” and “a sharp, hopeful crowd-pleaser that strikes the right notes!” SUMMER OF ICE CREAM, VOL 2: SHAKE NO. 8! Ranked the #1 Ice Cream Shop in Columbus, this is a perfect early stop on our Summer of Ice Cream! Their menu uses made-from-scratch recipes in an array of traditional, specialty and vegan shakes, hot cocoa, crepes, waffle sticks, specialty coffee & espresso, and more! Their specialty shakes are as delicious as they are over-the-top and they offer an extensive vegan menu! You can check out their full menu here: [https://www.shakeno8.com/menu.php](https://www.shakeno8.com/menu.php) PLAN: Please purchase your ticket for the 6:45pm showing and we’ll meet in the upstairs lobby between 6:25 and 6:35pm! Advance ticket purchase is advised for this opening night showing! Once you have yours, please list your seat number in the Comments section of this event. We'll head to nearby Shake No. 8 immediately following the show! Should be a fun one, Dan

Join us Tuesday (6/2) at 6:30 pm as we hike the Hundred Acre Woods in Westerville. This is a beautiful trail that is filled of hills and roots but a picturesque wooded landscape to hike. Wear your hiking boots if you have them. We will do 2 loops of the 1 mile trail.