Lstm reinforcement learning keras işler

...içeriklerim olacak. Kitapta en az yedi bölüm olacak: gitara giriş - akorlar ve ritimler ​​- gitar ile süsleme sanatı - akorlar ile süsleme - gitara karakter ve melodik katkılar ekleme. Her bölüm, konu ile ilgili çizim, metin, fotoğraf ve videolar içerecek Hello! My name is Erem and I want to be involved in this project. The project I want to run is an e-book to help those who want to start learning on the guitar. The format of the book will be as PDF and I will have content available in addition to it. The book will have at least seven chapters: introduction to the guitar - chords and rhythms - the art of decorating with the guitar - decorating with chords - adding character and melodic contributions to the guitar. Each chap...

Kaggle dan sınıflandırma üzerine bir dataset seçilecek. 1. Size tahsis edilmiş veri setini, tanımlanmış sınıflandırma problemini çözmek için Training, Validation ve Test olmak üzere üçe ayırın. 2. İlk olarak “common sense baseline” denilen ve tasarladığınız modelin yenmesi gereken ve basit bir mantıkla üretilen minimum başarı oranını belirleyin ve açıklayın. 3. Keras ortamında kendinize ait bir Convolutional Neural Network (CNN) modeli tasarlayın. 4. komutuyla modelinizdeki katmanların çıktısını görüntüleyin. 5. Modeli eğitin ve eğitim sırasında Training Loss ve Validation Loss grafiğini ve Training Accuracy ve Validation Accuracy grafiğini çizdirin. Bu grafikten overfitting durumun...

Features - Designed for tablets and phones. - APK 64 Bits - Supports both APPLIANCES ANDROID ARM & x86. - Admob Ads : Banner and Interstitials Update Android Studio 4.0.1 respecting Google recommendations for android development. This game is a good template for learning how to use Android Studio, containing video documentation of all the steps. Easy work in the simplest resking. you can then generate your APK within a day. from the installation of android studio, its configuration until the generation of a signed file. This game is highly recommended by our team for beginners. her monthly earnings average $ 20 per month. it just depends on your social media advertising to attract users to install it. Description This minimalist skill game is easy to play, but hard to master...

Algoritma, Machine Learning (ML) konularında bana yardımcı olabilecek birilerine ihtiyacım var.

- python dili ile deep learning uygulaması yapılacak. tensorflow ve keras kütüphaneleri kullanılacak. -elimde bazı görüntüler var. bu görüntülerde toplam 5-6 sınıfa ait nesneler var. -resim üzerindeki nesneler sınıflandırılacak.

Sabah yazışmıştık Machine learning için bir ödev vardı.

...raporlanmamak için bu işi veriyorum. Projede bize bir klasör verilmiş çiçek fotoğrafları var. Amacımız machine learning teknikleriyle programı eğitmek ve verdiğimiz fotoğrafı doğru tanımlamasını sağlamak. Kabaca bu şekilde yardımcı olabilecek kişilere daha da detay verebilirim. ------------------------------------------------------------------------------------------------------------------------ Hello there, Udacity training has been completed by the company for my name, but I cannot spare the time, so I give this job in order not to report negatively. In the project, there are flower photos that have been given us a folder. Our goal is to train the program with machine learning techniques and to ensure that it accurately identifies the photo...

Articulate storyline ya da Adobe Captivate kullanan arkadaşlara ihtiyacımız var. 3 ayrı ders için interaktif içerikler oluşturulacak ve Scorm paketi halinde teslim alınacak.

reinforcement ile transformice isimli oyuna kendi kendie oynaması için oyun botu yaparmsınız

openia sitesinden alınan hazır environmetin robotics olacak bunu yapay zeka ile kodlanmış hali.

...of the teacher, if they want, students can enable their cameras too. - Live chat box - Ability to add slides and move on them and draw on them with mouse - Setting the necessary back-end of the software with comments on how to integrate. - A box to ask questions - The student will be able to talk if the "raise hand" feature is confirmed by a notification that will appear on the screen of this learning. - Current student list - Record of the movements and video of the webrtc, the playability feature. Movements should be recorded as json. What is required for this is jquery / ajax / node whatever the software is set up. Kurs projemizde kullanacamz canl tahta uygulamasn hayata geçirecek gelitiriciler aryoruz. Tahtann özellikleri unlardr: - Real Time - Resim e...

Wordpress ile web sitesi hazırlanması. ( Tasarım içermiyor, sadece teknik) Vimeoya yüklenen videoların web sitesine gömülmesi. Uygun bir wordpress e-learning şablonun web sitesine eklenmesi. (Kullanıcı girişi sayfası olan, ve kursların yayınlanabileceği). Site güvenliği vs gibi diğer konularda danışmanlık.

Merhaba, Bir LMS- Learning management system site yönetmek istiyorum. Teklif verenler istanbulda olması, wordpesse ve dizayna çok iyi derecede hakim olmasını bekliyorum Hemen işe başlanacaktır

Merhaba, Bir e-learning sitesi yönetmek istiyorum Bunun için hazır bir wp softwarede buldum. Kurulum, dizayn, yeni modül entegrasyonları konularında yardımlarızı rica ediyorum.

Andoird akilli telefonlarinda oldukca basit bir gulme saptama programi gerekiyor. JavaCV kullanarak veritabaninda olan gulumseyen insan figurlerini kullanarak verilen veya program vasitasiyla cekilen resmin gulumseyen bir surat icerip icermedigini belirtecek. bu teknige Makine Ogrenmesi(Machine Learning) denir. Program fotograf cekebilmeli veya onceden cekilmis bir fotografda analiz yapabilmeli. Makine ogrenmesi teknigi zorunludur.

I'm looking for a creative logo designer to help me establish the brand identity of my new Early Learning Centre and day-care, the Elevate Learning Club. Key Elements: - The logo should reflect a sense of modernity, playfulness, and elegance. - The color scheme should predominantly feature blue, green, and yellow, to appeal to children aged 3 to 10, and also to convey trust and professionalism to parents. Design Elements: - Incorporate any combination of the following symbols - ABC blocks, children, and books. These elements are critical in communicating the essence of our brand - a nurturing and educational environment where children can grow and learn. Ideal Skills: - Expertise in graphic design and logo creation with a portfolio that demonstrates creativity and ...

...revolutionary journey with our exclusive seminar, designed to unlock new ways of perceiving the world: • Enhanced Learning: Master the ability to recognize objects while wearing a completely opaque mask. • Practical Skills: Learn techniques that can simplify and improve your daily life. • Health Improvement: Discover methods to enhance your overall well-being. • Extended Training: Enjoy an additional day of training, giving you a total of 6 days and 5 extra hours compared to our standard program. • Telekinesis: Experiment with moving objects in your hand without touching them. ? Limited Seats Available: We offer an intimate setting with only 24 spots to ensure a deep and personal learning experience. ? Seminar Details: • Dates: Octobe...

Create and upload learning materials (possible with ai) I am looking for a freelancer to create and upload teaching material for my new company. This person does not need to have any previous experience as the work will be very easy with the help of canva and ai. Task list Task 1 Research 1. Research and learn how tpt works 2. research how keywords and course design work (find research tools) 3. research trends and what sells on tpt Recommended sources: YouTube videos and online articles Task 2: Create materials 1. Research what is selling, what is trending and what topics have little competition but are being searched for (use tools from step 2 or the number of search results on tpt for specific keywords). 2. Create a teaching resource based on your research (include the shop lo...

Overview: EduVerse is an ambitious EdTech startup aimed at revolutionizing the education sector by integrating Learning Management Systems (LMS), virtual classrooms, online tutoring, and course marketplaces into one seamless platform. We are seeking a talented and experienced UI/UX designer to bring our vision to life with an engaging, intuitive, and visually appealing user interface. Scope of Work: The freelancer will be responsible for designing the entire user interface and user experience for the EduVerse platform. This includes, but is not limited to: Landing Page: A captivating and user-friendly landing page that effectively communicates the value proposition of EduVerse. Clear call-to-actions for signing up and exploring features. Authentication Pages: Login and Signup pa...

...project. The writer will be required to develop training content, catered to sales employees of a Marquee Indian Bank. Key Responsibilities: - Flash Card Creation: Creating easy to understand, engaging, and appealing notes. - Short Form Video Scripts: Writing compelling scripts for bite-sized learning videos. - Infographics: Developing informative infographics. - Listicle Composition: Crafting interesting, informative lists. - Assessment Formulation: Writing assessments to test comprehension and learning. Candidates must possess: - Excellent research and writing skills. - Ability to transform complex topics into engaging content. - Experience in creating educational content for sales audience. - An understanding of writing in simple language. - Ability to work in a fa...

As a sports enthusiast committed to helping others learn the sport of padel, I'm in search of skilled individuals who can create both video tutorials and written guides for this sport. Here's what I expect: - Content Structure: Easy to comprehend training split across beginner, intermediate, and advanced levels. The thought is to ensure everyone enjoys the learning process irrespective of their previous knowledge of padel. - Specific Techniques: As the client, I might not be specifying any particular techniques, allowing you the freedom to consider all aspects that can complete an individual's padel education. Ideal skills for this project include: - Great understanding of the sport of padel, either as a coach or as a seasoned player - Ability to create engaging v...

I'm seeking a skilled and experienced app developer who specializes in the Windows platform. My project is focused on creating an efficient and seamless learning application that can be used offline. Key aspects: - The core functionality of the app is to facilitate educational content sharing. Candidates with previous experience in e-learning apps will be highly preferred. - One of the critical requirements is that the app would be able to function in offline mode. The app should allow content to be downloaded and accessed without the internet. - Developers should be able to work with the Windows platform. Ideal Skills: - Expertise in Windows app development - Prior experience with creating offline-based apps - Familiarity with education-focused app development. Priori...

...a variety of subjects, including Math, Physics, Chemistry, calculus, and English. Key Responsibilities: - Design and develop an AI Tutor Module that covers the specified subjects. It should be able to provide students with clear, detailed, and understandable explanations for various problems. - Ensure the module is interactive, allowing for problem-solving sessions that engage students in the learning process. - Implement a user-friendly interface that students can easily navigate and utilize to benefit from the AI Tutor Module. Skills and Experience: - Demonstrated experience in developing AI-based educational tools or modules. - Strong understanding and background in the subjects the module is intended to cover (Math, Physics, Chemistry, calculus, and English). - Proficiency ...

I'm in need of an expert who can set up a system that can identify vehicles in a live CCTV stream, extract their images, and accurately read and transcri...such as night-time and weather conditions. We want this system to be installed at Stone Crusher. So vehicles will be of big size (Tipper, dumper) - **Data Storage**: The extracted images and transcribed number plates should be sent to an external API. Ideal Skills: - Proficiency in Computer Vision and Image Processing - Experience in real-time video processing - Strong background in Machine Learning, specifically in training and deploying models for object recognition and Optical Character Recognition (OCR) - Ability to work with APIs for data transmission - Prior experience with video analytics and surveillance systems wo...

I'm seeking a skilled developer to work on a project that involves the navigation of an indoor mobile robot using Deep Reinforcement Learning (DRL) based on camera data, rather than LIDAR. I have a GitHub repository and guide to provide as a basis, objective is to replace LIDAR data with camera data. Must use a simulation environment, preferably ROS with GAZEBO and RVIZ. Also I require documentation explaining how your implementation works as well. Key Requirements: - Development of an indoor mobile robot navigation system using DRL - Utilization of camera data for navigation, not LIDAR - Focused on path finding, obstacle avoidance and mapping are the primary goals. - Proficiency in Python is a must, as the project will be entirely implemented in this language - Profici...

I am looking to develop a learning platform designed specifically for primary school students. The platform will focus on providing innovative, engaging, and effective academic courses, particularly in the fields of Mathematics and Language Arts. Key Features Needed: - User-friendly interface: It should be simple and engaging for young learners, offering a straightforward navigation system. - Course Content: Development and incorporation of Math and Language Arts courses, keeping in mind the learning ability and curiosity of primary schoolers. Ideal Candidates: - Should have previous experience with education technology platforms, especially those catering to primary school students. - A solid understanding of Mathematics and Language Arts curriculum at the primary lev...

...problem-solving skills who can ensure the successful delivery of the project. The ideal candidate should have a strong portfolio of projects demonstrating their technical competency and have familiarity with the Android and/or iOS ecosystems. If you think you have the necessary experience and skill set to help create this mobile application, then I welcome you to submit a proposal and look forward to learning more about how you can help bring this project to life....

I'm seeking an experienced professional who can assist in developing a real-time FPGA AI on Android solution for monitoring. Key Requirements: - Industry: Monitoring - Data to be monitored: Media, Scanning, OCR - Functionality: Real-time media processing Skills and Experience: - Expertise in FPGA development - Sound recognit...Android AI - Prior experience in real-time media processing - Understanding of monitoring applications The ideal candidate would be able to effectively combine FPGA AI capabilities with Android to create a solution that can process media in real-time for monitoring purposes. Experience in similar projects or industries will be highly regarded.

I have a video i just want a software based on deep learning that can change the name taken in video , as i have list of names that need to changed. with lipsink

I want to develop an AI-powered tool that can analyze tooth size and shape. The tool should be capable of processing photographs of dental casts with a high level of accuracy for clinical use. Ideal Skills: - Proficient in AI and machine learning techniques - Experience in developing medical or dental-related software - Familiarity with 3D modelling and image processing - Strong understanding of dental anatomy and terminology The tool should ultimately aim to provide detailed, precise measurements to assist in dental treatment planning and orthodontic diagnosis. The end goal is to create a reliable tool that can be used as part of the clinical workflow in dental practices. Please respond with your experience in creating similar projects and any relevant qualifications that set ...

I'm looking for a Python developer with experience in deep learning and specifically TensorFlow for a denoising project. Key Details: - The project involves implementing a denoising code using the noise2void method. - The noisy images are in PNG format. - The denoising code should be developed using Python and integrated with TensorFlow. Ideal Candidate: - Proficient in Python and deep learning with a focus on TensorFlow. - Experience in denoising algorithms is a plus. - Familiarity with image processing in Python.

I worked incredibly hard for over a year to bring you a top-notch learning program with Freelancer.com that was never revealed before… It's not just about teaching you everything I know and sharing my journey to the #1 amongst 70 million people; it's also about connecting you with a great community.. Once you complete the program and pass the test, you'll earn an exclusive badge that very few people get.. But.. Also, you get all of the following INCLUDED with NO HIDDEN COST in a YEARLY price of 129 USD: ➡️ Be among the elite few to earn the new IFC badge on your profile so that you can stand out! (Upon successful completion of the test) - Priceless! ➡️ Unlock hours of groundbreaking video content I’ve been working on for months that's nowhere el...

Cerchiamo un programmatore PHP con esperienza in Learning Management Systems (LMS), in particolare Moodle, e conoscenza nell'integrazione di Moodle con Zucchetti. Requisiti chiave: - **Integrazione:** L'obiettivo principale di questo progetto è stabilire una perfetta integrazione tra Moodle e Zucchetti. Ciò comprende: - Sincronizzazione: garantire che i dati siano sincronizzati correttamente tra i due sistemi. Ciò comporta la sincronizzazione: - Registrazione Utente - Autenticazione utente - Iscrizione al corso - **Single Sign-On (SSO):** Facilitare un meccanismo di Single Sign-On tra Moodle e Zucchetti. Ciò implica rendere più semplice per gli utenti l’accesso a entrambe le piattaforme senza la necessità di accessi sepa...

I am looking for a freelancer who can help me achieve an overall rating of over 4.5 on all my chatbot and AI courses on Udemy. Key Requirements: - I have over 32 courses. Each of these courses should have an individual rating of over 4.5. - The overa...surpass the 4.5 rating threshold. I do not want you to get fake engagements at all. It's all about getting the right customers with marketing so that we get the 5 star reviews. Time Frame: - I have a timeline of one month in which I aim to achieve this target. Ideal Freelancer: - Experience in the area of AI and ChatGPT is a huge plus. - Proven track record of improving ratings in online learning platforms. - Ability to deliver high-quality, genuine, and engaging reviews. Please bid with a plan on how you intend to achie...

I'm looking for a skilled developer with experience in EPiServer and Moodle to help migrate our existing EPiServer CMS 7.5 website onto the Moodle Learning Management System (LMS). Key Requirements: - Migrate EPiServer website to Moodle LMS: This is the main focus of the project. The professional should be able to handle the migration process from start to finish. - Freelancer's time zone should be within a 4-hour difference from Sydney (GMT+10) - When you make an offer, provide a plan, primary tasks, and cost for each. - Also mention your years of experience with EPiServer, and your years of experience with Moodle. - Please don't email nor call. Just apply and send communication through freelancer.com. Required Skills and Experience: - Proficiency in EPiServer: The...

As a newbie in Power BI, I'm looking for a comprehensive personal tutoring that covers various aspects. Here's what I need: * Intuitive understanding of Data modeling * Establishme...need: * Intuitive understanding of Data modeling * Establishment of Visualization best practices * Ins and outs of DAX formulas The ultimate goal is to empower myself with the ability to: * Create interactive dashboards * Perform rigorous data analysis * Present data effectively It would be advantageous if you have prior experience teaching Power BI to beginners and can create a structured learning path. Your patience, communication clarity, and ability to break down complex concepts into easily understandable nuggets will be deeply valued. Looking forward to embarking on this enlighteni...

I worked incredibly hard for over a year to bring you a top-notch learning program with Freelancer.com that was never revealed before… It's not just about teaching you everything I know and sharing my journey to the #1 amongst 70 million people; it's also about connecting you with a great community.. Once you complete the program and pass the test, you'll earn an exclusive badge that very few people get.. But.. Also, you get all of the following INCLUDED with NO HIDDEN COST in a YEARLY price of 129 USD: ➡️ Be among the elite few to earn the new IFC badge on your profile so that you can stand out! (Upon successful completion of the test) - Priceless! ➡️ Unlock hours of groundbreaking video content I’ve been working on for months that's nowhere el...

This is an ongoing role for the right candidate with 2D animation experience and skills. We need a talented and creative individual skilled at designing video-based learning resources. The primary goal of this project is to engage learners, explain complex concepts, and enhance visual appeal. The target audience for these resources is professional individuals. Role responsibilities - Take provided scripts and basic slides created by SMEs and bring them to life with animation, turning them into creative and engaging video lessons that enhances knowledge transfer and retention - Storyboard scripts and use creative Motion Graphics expertise to visualise instructional graphics - Understand instructional end goals and create content that matches them - Apply tested instructional...

...professional who can develop an interactive augmented reality (AR) system for my laboratory. The primary aim of this project is to enhance learning experiences through the use of object tracking. Key project elements include: - Object Tracking: The system needs to accurately track laboratory equipment. This is crucial for the interactive learning aspect of the project. - Augmented Reality: The tracked equipment should be overlaid with relevant, educational AR content. - Display Platform: The AR content should be displayed on mobile devices. Skills and Experience: - Expertise in AR Development: Proven experience in developing AR systems, with a focus on interactive learning. - Object Tracking: Proficiency in implementing accurate and reliable object tracking in AR en...

I need a C# UWP application that compiles string as code using roslyn compiler. 1) should analyze code for errors and show error to user 2) take code from string variable, compile code and show output to user 3) sample code should include a while, if, variable assigment, arithematic, text output This is a template/skeleton/learning project. Must provide full documentation and details e.g. any project settings such as adding fulltrust capability, any limitations etc.

**NO OR LIMITED EXPERIENCE IS OK - FEEL FREE TO APPLY. DO NOT USE GENERIC BID TEXT (NO COPY PASTING)*** Role is perfect for motivated and learning individuals who are eager for feedback and want to grow skills. Duration is 30 days internship. Those who surpass expectations will receive a serious offer to stay on team with better compensation. Sample tasks and responsibilities include, and are NOT limited to: 1. Research key topics or areas of interest and presenting options for the next steps. -> googling 2. Executing next steps and promptly executing action items from discussions. -> take instructions and act fast 3. Propose options from research as requested -> more googling 4. Be able to advise proactively on details including step by step documents where needed...

**NO OR LIMITED EXPERIENCE IS OK - FEEL FREE TO APPLY. DO NOT USE GENERIC BID TEXT (NO COPY PASTING)*** Role is perfect for motivated and learning individuals who are eager for feedback and want to grow skills. Duration is 30 days internship. Those who surpass expectations will receive a serious offer to stay on team with better compensation. Sample tasks and responsibilities include, and are NOT limited to: 1. Research key topics or areas of interest and presenting options for the next steps. -> googling 2. Executing next steps and promptly executing action items from discussions. -> take instructions and act fast 3. Propose options from research as requested -> more googling 4. Be able to advise proactively on details including step by step documents where needed...

...AI trainer to create the New.” Responsibilities Develop and implement features that enable users to train and customize their personal AI models. Integrate advanced AI and machine learning algorithms to enhance the platform’s capabilities. Ensure seamless user experience and interaction with the AI models. Collaborate with the team to continuously improve the platform’s functionality and performance. Work on both frontend and backend development to support the overall architecture of im1ai.ca. Requirements Proficiency in JavaScript, Realjs Node.js and relevant frameworks. Experience with AI and machine learning technologies, including fine-tuning and embedding models. Strong problem-solving skills and ability to work independently. Experience with web de...

I'm a beginner looking for a tutor to help me learn and understand Git and Python, with a focus on branching, version control, Python syntax and functions, as well as building Machine Learning (ML) and Artificial Intelligence (AI) models. My preferred learning style is through hands-on projects. The ideal candidate should have the following skills and experience: - Proficiency in Git and Python - Experience with version control, branching and merging - Strong understanding of Python syntax and functions - Background in building ML and AI models - Ability to teach through hands-on projects.

I need an iOS educational application developed. The core objective of this app is to facilitate better learning and task management. Key requirements and experience needed: Key Requirements: - Strong proficiency in iOS development - Prior experience in educational apps is preferred - Task management functionality within the app - Intuitive UI/UX design that caters to all age groups - Must follow Apple's App Store review guidelines Ideal Experience: - iOS app development - Integrated task management system - Building educational apps - Expertise in UI/UX design Creating a seamless and impactful learning experience is the ultimate goal of this project. The goal of the app is to bring small business together with investors to see how investors can improve or invest in ...

The task involves integrating a machine learning model, specifically in the ONNX format, into a Flutter application to enable text classification into five categories based on user descriptions. This requires the development of a custom Flutter plugin that facilitates communication between Flutter's Dart code and native code on both Android and iOS platforms. The plugin will utilize the ONNX Runtime to handle the loading and execution of the model, with the Flutter application calling this plugin to process and classify text inputs. (My budget is no more than 30 euros but i will habe 3 models on the same application if you are successful so please do not waste both of our time if you dont have time or dont agree with the budget.)

I'm in need of a Python Jupyter expert who can support me in the development of a machine learning model. Here are the specifics: - **Task**: The primary task revolves around machine learning, specifically model development. - **Current Project Stage**: The project is currently focused on model development, so we've already completed the data collection phase. - **Model Type**: The model type we're focusing on is classification. Ideal candidates should have solid experience in machine learning, particularly in classification models. Expertise with Python and Jupyter is also a must. If you have a good handle on data analysis and statistics, that would be a huge plus.

...fees based on their inputs. Client Portal Tool: Clio, MyCase, or custom development. Implementation: Create a secure login area where clients can access documents, communicate with your team, and track case progress. Ensure the portal is user-friendly and secure. Gamification Tool: Custom development or platforms like Kahoot for quizzes. Implementation: Develop quizzes, challenges, or interactive learning modules that educate users on legal topics in a fun and engaging way. Social Media Integration Tool: Use social media plugins available for your website platform (e.g., WordPress plugins). Implementation: Embed social media feeds and share buttons to allow users to share content directly from your website. Promote your social media presence to encourage cross-platform engagement...

I'm looking for a skilled animator with expertise in 2D animation to create an educational content video. The animation will be accompanied by a voiceover. Key Requirements: - Develop engaging 2D animations that cater to adult audiences, ensuring the ...educational objectives of the voiceover. - Experience in collaborating with voiceover artists, ensuring a seamless integration of animation and audio. Ideal Candidate: - Strong portfolio of 2D animation projects, especially those with a focus on educational content. - Excellent communication skills to ensure the alignment of the animation with the voiceover script. - A good understanding of adult learning principles, translating them into engaging visuals. - Familiarity with working in a fast-paced environment with quick tu...

We are seeking an expert in connecting the smart contract auditing process with artificial intelligence and machine learning technologies. The ideal candidate will have a deep understanding of smart contract security and experience in integrating AI/ML algorithms and techniques into the auditing process. This project involves developing and implementing advanced algorithms to analyze and detect vulnerabilities in smart contracts, and leveraging AI/ML to enhance the accuracy and efficiency of the auditing process. We're looking for a talented AI/ML specialist to help build our smart contract auditing bot/script. We're hoping to use ML/AI or something similar to train the model on the data found in Please only apply if you: - Are 100% certain you can build this/know how