Complex Analysis for Math Engineering

Simulation of ODE/PDE Models with MATLABR, OCTAVE and SCILAB shows the reader how to exploit a fuller array of numerical methods for the analysis of complex scientific and engineering systems than is

The purpose of this book is to provide an integrated course in real and complex analysis for those who have already taken a preliminary course in real analysis. It particularly emphasises the interpla

The twelfth edition of the market-leading Engineering Economic Analysis offers comprehensive coverage of financial and economic decision making for engineers, with an emphasis on problem solving, life

In-depth details on the proper application of systems analysis tools for sustainability engineeringSystems Analysis for Sustainability Engineering explains how to conduct holistic assessments in a pr

For senior-level undergraduate and first and second year graduate systems engineering and related courses. Systems Engineering and Analysis, 5/e, provides a total life-cycle approach to systems and th

Although computer technology has dramatically improved the analysis of complex transport phenomena, the methodology has yet to be effectively integrated into engineering curricula. The huge volume of

Just the math skills you need to excel in the study or practice of engineering Good math skills are indispensable for all engineers regardless of their specialty, yet only a relatively small portion

Introducing engineering students to numerical analysis and computing, this book covers a range of topics suitable for the first three years of a four year undergraduate engineering degree. The teachin

A concise textbook on complex analysis for undergraduate and graduate students, this book is written from the viewpoint of modern mathematics: the Bar {Partial}-equation, differential geometry, Lie gr

Complex Analysis with Mathematica offers a way of learning and teaching a subject that lies at the heart of many areas of pure and applied mathematics, physics, engineering and even art. This book offers teachers and students an opportunity to learn about complex numbers in a state-of-the-art computational environment. The innovative approach also offers insights into many areas too often neglected in a student treatment, including complex chaos and mathematical art. Thus readers can also use the book for self-study and for enrichment. The use of Mathematica enables the author to cover several topics that are often absent from a traditional treatment. Students are also led, optionally, into cubic or quartic equations, investigations of symmetric chaos and advanced conformal mapping. A CD is included which contains a live version of the book: in particular all the Mathematica code enables the user to run computer experiments.

Students often find the subject of complex analysis very difficult. An opening chapter provides a brief history of complex analysis which sets it in context and provides motivation.

Look at the owl and the pig and the bear and the puppy and the rabbit. What do you think they're waiting for?Something wonderful?A visitor?A surprise?Maybe they're waiting for you! 商品除瑕疵品外，恕不接受退換貨因拍攝略

如果有一天變成熊，你會做什麼？在本書中，「我」一早醒來，吃早餐、騎摩托車，還順手拯救被熱氣球帶走的好朋友——這些都是再正常不過的「熊日常」。當然，不可能站在全班面前做一份無聊又詳盡的熊類報告吧？Corey R. Tabor 以第一人稱視角巧妙鋪陳，讓讀者彷彿成了那隻熊，畫面邊緣還能看見熊的手腳晃動，幽默感十足。故事在出其不意的轉折中揭露真正的說話者，也溫柔回應孩子對上台報告的緊張。曾獲 Caldecott Honor 與三座 Geisel Award 的作者，再次帶來兼具創意與笑點的圖畫書。Assignment: Imagine yourself as a bear for the day. What would you do? Caldecott Honor and three-time Geisel Award–winning author and illustrator Corey R. Tabor offers an inspiring—and surprising—answer in this funny picture book for fans of Mo Willems, David Shannon, and Peter Brown.If you were a bear for a day, what would you do? Probably wake up, eat breakfast, go for a motorcycle ride, and rescue your best friend from a rogue hot air balloon. . . . You know, normal bear stuff!You certainly wouldn’t stand in front of the whole class and give a boring, detailed, and informational report about bears.Dynamically illustrated from the bear’s perspective, the Caldecott Honor and three-time Geisel Award–winning Corey R. Tabor delivers an innovati

INSTANT #1 NEW YORK TIMES BESTSELLER! "Prepare to meet your next obsession." -- Rebecca Ross, author of Divine Rivals From New York Times bestselling author Rachel Gillig comes the next big romantasy sensation, a gothic, mist-cloaked tale of a young prophetess forced on an impossible quest with the one knight whose future is beyond her sight. Perfect for fans of Jennifer L. Armentrout and Leigh Bardugo. Sybil Delling has spent nine years dreaming of having no dreams at all. Like the other foundling girls who traded a decade of service for a home in the great cathedral, Sybil is a Diviner. In her dreams she receives visions from six unearthly figures known as Omens. From them, she can predict terrible things before they occur, and lords and common folk alike travel across the kingdom of Traum's windswept moors to learn their futures by her dreams. Just as she and her sister Diviners near the end of their service, a mysterious knight arrives at the cathedral. Rude, heretical, and devilis

※請確定您所選購之期刊正確無誤，本期為2026年6月號※※因雜誌到貨日期不一，請於下單時在備註欄填上您欲購買之期號(過期雜誌恕不接受訂購)※※本期號上架時間至2026/06/15※適用全民英檢中高級以上6月號精選主題1、LA School Cellphone Ban:Year One 洛杉磯學校手機禁令：第一年2、Don’t Stop Thinking About Tomorrow 別停止思考明天3、Exploring the City of Art 探索藝術之都-藝術評論家帶你遊覽巴黎博物館4、NEWSworthy Clip 新聞剪輯5、AI: Behind the Scenes AI：幕後真相6、How Running Changes Lives 跑步如何改變生命7、Better Bone Health From NASA 來自美國太空總署的骨骼保健療法8、Misunderstood Can Be Good 被誤解也可能是好事9、Joy Meets Anxiety 樂樂遇上阿焦10、Engineering the Environment 操弄自然環境11、The Lessons of History 以史為鑑12、From Hand-Drawn to High-Tech 從手繪到高科技

※請確定您所選購之期刊正確無誤，本期為2026年6月號※※因雜誌到貨日期不一，請於下單時在備註欄填上您欲購買之期號(過期雜誌恕不接受訂購)※※本期號上架時間至2026/06/15※適用全民英檢中高級以上6月號精選主題1、LA School Cellphone Ban:Year One 洛杉磯學校手機禁令：第一年2、Don’t Stop Thinking About Tomorrow 別停止思考明天3、Exploring the City of Art 探索藝術之都-藝術評論家帶你遊覽巴黎博物館4、NEWSworthy Clip 新聞剪輯5、AI: Behind the Scenes AI：幕後真相6、How Running Changes Lives 跑步如何改變生命7、Better Bone Health From NASA 來自美國太空總署的骨骼保健療法8、Misunderstood Can Be Good 被誤解也可能是好事9、Joy Meets Anxiety 樂樂遇上阿焦10、Engineering the Environment 操弄自然環境11、The Lessons of History 以史為鑑12、From Hand-Drawn to High-Tech 從手繪到高科技

Joining the bestselling Paint by Sticker Kids sticker-activity series is Paint by Sticker Kids: Fairytale Magic, packed with brightly colored storybook worlds, including five foil sticker images. The Paint by Sticker Kids series has sold more than 10 million copies to date, and the reasons are obvious: stickers, stickers, and more stickers! Plus, it's a craft that delivers hours of screen-free, mess-free fun. Paint by Sticker Kids: Fairytale Magic is full of brightly-colored scenes from classic storybook tales. Kids will delight in stickering a Snow White's poisoned apple, Rapunzel's tower, Cinderella's glass slipper, the Frog Prince, and more--one sticker at a time. The happily-ever-after edition includes five images that feature foil stickers for an extra touch of magic and fun. Painting by sticker is easy, mess-free, and portable (plus, all the pages are perforated so multiple kids can create at the same time!). The stickers are designed to be easy for small hands to maneuver, and n

本書旨在為國小教師提供一套兼具理論深度與實務操作的教學指南，協助教育工作者在課堂中有效實踐「STREAM」教育理念。書中核心將閱讀與素養（Reading）納入跨領域架構，強調科學（Science）、技術（Technology）、工程（Engineering）、藝術（Arts）與數學（Mathematics）的有機整合，透過閱讀貫穿理解、詮釋與溝通的完整學習歷程。全書共分為三大章節：第一章從課程設計理念出發，連結國內外教育政策與108課綱核心素養，闡述跨界學習回應21世紀挑戰的重要性。第二章聚焦環境議題「我們呼吸的空氣安全嗎？」，示範如何結合感測科技、數據分析與環境倡議，設計具探究性的教學活動。第三章則延伸至健康議題「我們吃得健康嗎？」，展示從低年級感官探索到高年級資訊檢索與行動倡議的跨年級教學藍圖。本書不僅提供完整的課程架構與評量建議，更透過兩大主題單元的實例，協助教師將跨學科理念轉化為具體的課堂行動，是致力於課程創新與素養教學的必備資源。

Step inside a medieval castle on the eve of a grand jousting tournament when the arrival of a mysterious knight sets tensions rising. In this story you'll discover how knights are trained, how they dress for battle, watch jousting and sample foods sold to excited crowds.- Told in lively comic book style- Perfect for school projects

你曾被 AI 的浪潮震撼，卻不知道從何跟上？ ♛ AI Agent 實戰全攻略 架設 × 架構 × RAG × 落地 ♛ 繁中市場第一本填補 Low-Code 與深度架構之間的技術空白 ♛ 買書即贈 10 小時實戰課程（市售 NT$4,800） ♛ 再提供購買進階課程 30 小時的讀者專屬優惠 ♛ 110 項專利工程師的企業 AI 實戰筆記 ♛ 私有化部署首選：手把手教你 Docker 地端架設，機密資料 100% 不上雲。 ♛ 拒絕 AI 幻覺：深度解析 RAG 知識庫架構，確保企業資料精準輸出。 ♛ 高效開發心法：系統化 Prompt 工程六大情境，十大應用流程，告別盲目試錯的開發模式。 ♛ MCP 完整應用：打破數據孤島，讓 AI Agent 擁有存取企業資料的「萬用插座」 這本書，就是為那些「想快速導入 AI，又不想被程式碼綁死，同時極度重視系統穩定與資料安全」的開發者與企業技術人而寫的。 市場上的 AI 書，大多走兩個極端：一邊是要你從 PyTorch 重新學習的純程式書，另一邊是教你打 Prompt 的操作手冊。本書切入中間的巨大藍海――以 Dify（Low-Code）為核心工具，完整實踐「架構師視角」的企業級 AI 開發。 這本書能帶給你什麼？ 👉手把手在 Ubuntu/Windows 用 Docker 建立私有 Dify 環境，資料不上雲 👉從 Chatbot 到多步驟 Workflow，設計真正能跑的 AI Agent 👉深入 RAG 架構，打造懂公司業務、解決幻覺問題的企業知識庫 👉系統化 Prompt Engineering 六大情境心法、十大流程應用，告別盲目試錯 👉32 個含金量極高的落地範例：合約審查、會議紀錄、LineBot 串接、Code Review… 👉附件加碼：MCP 全攻略――讓 AI Agent 直接讀取企業資料庫的USB-C標準 無論你是傳統軟體工程師想轉型、系統架構師需要私有化方案，還是企業 IT 主管急需可用的 AI 落地藍圖，這本書已經把路鋪好、坑填平，連裝備都替你備齊。 剩下的，只需要你翻開第一頁。 這是一本目前繁中市場最熱切期盼的AI工具書――結合Low-Code與企業級架構的AI落地指南，完整涵蓋架設、架構設計、RAG知識庫、Workflow與MCP整合，協助企業快速打造可上線的AI Agent解決

Uncover the wonders of Ancient Egypt with this interactive trivia book from Jeopardy! host and champion and New York Times bestselling author Ken Jennings! Travel back in time with Ken Jennings to become a Junior Genius! Did you know that the Egyptians invented toothpaste? Or that the Great Pyramid of Khufu was the tallest building on Earth for almost 3,800 years? Discover fascinating facts about Egypt's amazing monuments, powerful pharaohs, and more in this Junior Genius Guide filled with neat illustrations, cool trivia, and fun activities.

From theNew York Timesbestselling author of the School for Good and Evil series comes a renegade thriller, about a teenager elected President of the United States, sparking a global revolution of young leaders—until one of them is murdered and he’s the prime suspect.**The first edition ofYoung Worldis presented in brilliant neon color, with over 150 nuke-orange visuals, fizzy orange-and-blue stained edges, full-color designed endpapers, and a neon-orange cover case.**"This book is a damn revolution." —Nic Stone, #1New York Timesbestselling author ofDear MartinAmerica is on the brink of collapse, and the youth have lost all faith in their leaders. As a pivotal election approaches, Benton Young, a high school senior trying to impress a girl, impulsively uploads a video, daring everyone to interfere with the vote and write him in for President. The video explodes online, igniting election chaos and a national revolt, until the Supreme Court intervenes to put Benton in the White House. Gal

蟑螂版福爾摩斯出任務！《Sherlock Roach》：讓孩子愛上閱讀的第一本「偵探橋樑書」（如果不怕蟑螂的話）消失的餅乾屑，只有他能找回來！當「蟲蟲市」最偉大的偵探 Sherlock Roach 遇上他最忠誠的搭檔 Dr. Wormston，一場發生在地下世界的美味謎團就此展開。面對神祕失蹤的酥脆餅乾屑，這對好友必須穿梭在昆蟲界的暗處尋找線索。他們能在所有餅乾屑被吃光前破案嗎？如果您正在尋找一本能讓孩子放下平板、主動拾起書本的作品，《Sherlock Roach and the Case of the Crunchy Crumb》就是那個完美的鉤子。它不只是一個偵探故事，更是培養孩子邏輯推理、觀察力與閱讀耐心的最佳起點。Star Chapter Books are the perfect bridge for kids moving beyond beginning readers but not yet ready for longer chapter books. With short chapters, bold two-color illustrations, and fast-paced, funny stories, these confidence-building books make reading fun and rewarding.In this quirky animal mystery, Bugopolis's greatest detective takes on his tastiest case yet--the hunt for a missing crumb!Sherlock Roach and his loyal partner Dr. Wormston are more than just a detective duo--they're friends who always stick together. When a very important crumb vanishes without a trace, the pair hunts for clues throughout the insect underworld in a mystery that's easy to follow, fun to read,

For fans of the Warrior Cats franchise, this action-packed sequel follows Zephyr, a tank-bred axolotl newly freed into the lake whose rebel faction is intent on destroying the Immortal Code. Zephyr isn't out to make friends. After a grueling escape from an axolotl breeding facility all he cares about is being reunited with his sister Luna. He places his trust in Neptune, a wise tiger salamander, who promises to look for her. But the search is fraught, and Neptune refuses to venture above in the dark. Feeling betrayed, Zephyr sets off on his own and soon encounters Jasper, an ambitious axolotl hungry for power. Zephyr quickly finds himself embroiled in a fight between axolotls who believe regeneration is the key to survival and others who want to evolve and roam free. The struggle for power is vicious, and there are many more dangers waiting for them both above and below the surface of the lake. This thrilling adventure is complete with legendary battles, incredible alliances, and a mov

Abandoned at birth, Ace struggles to survive both human and animal predators in his quest to save himself--and his entire species--in this epic middle grade fantasy for fans of Warrior Cats, starring the X-Men of the sea: axolotls. There's danger lurking in the depths of the lake. Ace learns this early when his twin brother cruelly devours his tail and leaves him for dead. Separated from his family, he is cast off into the depths of a perilous waterway. Ace is wary to trust others, but his survival will depend on it as he navigates treacherous algae blooms and hunts for food, all while he waits for his tail to regenerate. And when he stumbles upon a glowing green axolotl named Ariel, he learns that with training axolotls can develop an incredible power: immortality. With high rewards come unspeakable risks, and Ace has been hurt before. But the potential to cheat death might be too hard to resist. This action-packed adventure explores the strength that develops through adversity as Ace

◎代理經銷 白象文化這是一本自閉症兒童繪畫與成長的歷程，記錄著身為母親，從確診開始，在各不同成長階段，一路身、心的陪伴與照顧的過程。This is a book about the painting and growth process of autistic children. It records the process of being a mother, starting from the diagnosis, and accompanying and caring for you physically and mentally at different stages of growth.

Another laugh-out-loud monster adventure in the Billy and the Mini Monsters chapter book series, perfect for newly independent readers and fans of Wigglesbottom Primary.Billy LOVES football! He wants to play as well as his football hero... But in the first match of the season, Billy's game does NOT go to plan. The Mini Monsters are worried, too. Does Billy love football more than them? Maybe it's time for the Mini Monsters to start playing football... What could possibly go wrong?

In the time before The Force Awakens, where is the Millennium Falcon?!Less than satisfied with a settled life, Han Solo lands on the idea of reclaiming the Falcon and returning to a life of adventure. The problem is, he can’t find it! After enlisting a less than enthusiastic Chewbacca, the duo embarks upon a quest to reclaim the greatest ship in the galaxy. Standing in their way are a laundry list of rogues who have staked a claim to the Millennium Falcon as well — like Ducain, the villainous scoundrel who stole it!COLLECTING: Star Wars: Hunt for the Falcon (2025) #1-5

Elephant and Piggie stick together like only best friends can! This fun-filled sticker-scene book features favorite Elephant & Piggie adventures along with special guest appearances from a cast of pals including Snake, Bat, Whale, and Ice Cream Penguin. Dance with Gerald, play ball with Snake, make slop with Piggie, go for a drivey-drive-drive, and so much more!

偶像、網紅、吸血鬼……特別的世界與情境。收錄〈Cry for the Moon〉、〈Pink for Tear〉、〈和那女孩變熟的方法〉、〈不當偶像後想做的事〉、〈不要叫我王子殿下〉、〈白妙大人，要保密喔〉、〈藍天與白色緞帶（雙人部屋）〉、〈明天醒來後（雙人部屋）〉等八篇百合作品。 ©2024 YUKIKO╱GENTOSHA COMICS INC. ★首刷限定精美典藏書卡！（首刷售完即無贈品） ★雪子的「百合」作品集，收錄未公開新稿。

INSTANT NEW YORK TIMES BESTSELLER · When San Francisco is under strange attacks—like earthquakes affecting only two city blocks at a time—who're you gonna call? An elite team of crime-fighting underdogs, that's who! The Misfits are on the case in this hilarious illustrated series!“For any kid who’s felt like a misfit, this crackling adventure packs a wallop!” —Lincoln Peirce, creator of Big NateOof! After solving the case of the Royal Rumpus, Olive Cobin Zang and her elite team of underdogs are on top of the world. As the awkward, crime-fighting Misfits, they’re acing every mission thrown at them from NOCK (aka No One Can Know, the covert agency they work for).But when their classmate Zeke starts receiving threatening notes, the Misfits are stumped. They’re no strangers to danger, but this case is a total head-scratcher. Who would target kind, friendly Zeke . . . unless he’s not what he seems to be?At the same time, unusual earthquakes start shaking up San Francisco just as priceless a

Jump-start your preschooler's exposure to vocabulary using this adorable book featuring 100+ foundational words for their favourite animals!Help your preschooler learn their first words faster with this beautifully illustrated board book featuring 100+ foundational words for their favorite animals—designed by a licensed speech therapist to support early speech development.Perfect for babies and toddlers, this engaging book introduces 100 foundational first words through charming watercolor illustrations of animals your child already loves.Why Parents Love It:• Builds early vocabulary for babies & toddlers• Supports language development with functional, everyday animal words• Designed for little hands with a durable, easy-to-hold board book format• Created by a certified speech therapist for trusted learningExplore a World of Animals:Farm, jungle, ocean, forest, pets, bugs, and more—making it one of the most engaging animal books for boys and girls.Interactive “Seek & Find” Lear

Welcome to The Very Noisy House! Knock on the door – RAT-A-TAT-TAT – and let’s see what’s inside . . . In this noisy adventure jam-packed full of sounds, you’ll make your way through the mixed-up room (where elephants say baa!), down into the spooky cellar (look out for the ghost!), through the super-quiet secret passageway (shhh, whispering only!) . . . and if you’re feeling brave, you could even try opening that grrrrrowling cupboard. A noisy adventure with a quiet bedtime ending that encourages little ones to play along. Also by Sally Nicholls and Gosia Herba: The Nose, Toes and Tummy Book

When you press the sound button on each page of this delightful book, you'll hear different instruments getting ready for the big concert... until they all play together at the end. With charming illustrations full of humorous details to talk about, and a sprinkling of facts about the orchestra, this is a perfect introduction to the magic of classical music.

A hilarious alphabet adventure that will have readers racing from A to Z!A is for apple. B is for ball. C is for castle. But wait! D is NOT for dog. There's a wolf in this book and it's lurking right behind you. YOU are the hero of this story! Can you spot the sneaky wolf hiding throughout this book, escape its clutches and make it all the way to Z? You better watch out for its devious disguises!From the creators of award-winning How to Count to One, featured in the New York Times, comes this mad-cap story that will have you on the edge of your seat! How well do you know your ABC?Praise for How to Count to One:"Just as we once screamed at a pigeon not to drive the bus, we now, with similar glee, take on Salmon as he commands us not to count past one." - New York Times"This debut is more than a book; it's an invitation to have fun." - Observer"Counting book with a delightful difference" - GuardianIncludes a FREE Nosy Crow Stories Aloud® audiobook! Scan the code, hear the story.

The first book in a fast-paced, funny adventure series for kids 8+ from number 1 bestselling, multi-award-winning author, David Solomons and packed with illustrations from Miguel Díaz Rivas!When Adam and his friends accidentally reveal the secret location of ex-spy, Professor Goodspeed, they don't expect an entire world of villains to turn up on their doorstep, looking for the MI6's most famous - and dangerous - invention. Drawn into a dastardly plot, the friends must rescue the Professor and take on evil Dr Toe and all his henchmen to boot.It's going to take buckets of bravery, a truckload of gadgets - including a flying bike, a robot-shark shield and, the deadliest of weapons . . . a glitter glue grenade - along with A LOT of luck to defeat the bad guys and stop them taking over the world.At least the Summer holidays won't be boring . . .Explore more titles from David Solomons:*My Brother is a Superhero*My Evil Twin is a Super Villain*A Beginner's Guide to Ruling the Galaxy

**NOW A MAJOR TV SERIES ON DISNEY+ AND HULU**THE NUMBER ONE BESTSELLER - JOINT WINNER OF THE BOOKER PRIZEIn this electrifying sequel to The Handmaid’s Tale, Margaret Atwood answers the question that has tantalised readers for decades: What happened to Offred?The Republic of Gilead is beginning to rot from within. At this crucial moment, two girls with radically different experiences of the regime come face to face with the legendary, ruthless Aunt Lydia. But how far will each go for what she believes?‘Gripping’ Guardian‘Powerful’ The Times‘Urgent, moving and as tense as any thriller’ Mail on Sunday

From hilarious MEGA-BESTSELLING author Katie Kirby comes a brand-new story in the phenomenal LOTTIE BROOKS series!Pack your bags, and put on your helmets, for Lottie s latest hilarious diary! She s off on a ONCE IN A LIFETIME skiing holiday - what could possibly go wrong?!Amber has seen the light and returned to the QUEENS OF EIGHT GREEN. PHEW! And now she s invited Lottie on her family skiing holiday RESULT!One tiny problem . .. Lottie s never been skiing before and she doesn t know her piste from her poles! How hard can it be though?Join Lottie as she learns how to ski with old and new friends, tries fondue for the first time and discovers what the banana of destiny has in store for her.Will this be the best holiday ever or is it all downhill from here?Readers LOVE Lottie Brooks:My daughter couldn't put it down and read it in 2 days. Read at breakfast, walking downstairs, tea time, in the bath.My 9-year-old daughter devoured it in two nights, and all I could hear from her was gigglin

Don't miss out on the stunning DELUXE LIMITED EDITION while supplies last. This breathtaking collectible is only available on a limited first print run in the U.S. and Canada only, a must-have for any book lover. Perfect for fans of The Hunger Games, Wilder Girls, and The Grace Year, The Verdant Cage is a gripping dystopian thriller about rebellion, survival, and the terrifying cost of uncovering the truth.The Wall was built to keep them safe. Or so they thought.For as long as seventeen-year-old apothecary Rose Allgood can remember, the towering stone Wall surrounding Noah’s Valley has protected her people. No one leaves. No one fights. And no one questions why.But their paradise has been hiding its thorns. When Rose’s mother becomes the Valley’s first murder victim and her twin brother is swiftly condemned, she alone is searching for the real killer. Determined to find the truth, she follows a trail of hidden messages, forbidden knowledge, and whispers of a past no one dares to rememb

Embrace the spirit of beekeeping and build your very own miniature beehive right at your desk.Specifications:Includes 15 pieces of pre-cut wood to assemble into a 4-inch-tall beehive with a hinged lid, complete with removeable acrylic stickers of simulated honey and bees. Also includes 2 faux jars of honeyIllustrated Mini Book:Includes a 48-page mini book with essential information about how to raise your own honeybees and other beehive basicsA Unique Gift:The perfect gift item for beekeepers, bee lovers, and sustainable living enthusiasts