facebook
    Mamadou
    member icon
    Trusted teacher
    favorite buttonAdd to Wish List
    favorite buttonAdd to Wish List
    member icon
    Trusted teacher
    from26.00EUR/ h

    Learn to learn: Math, Physics and Chemistry courses Computer programming

    Translated by Google. Click to view original.
    In Science, Technology, Engineering and Mathematics (STEM) we don't understand things, we get used to it!

    You are in college or high school (L, S, ES, STMG or STL) and you encounter difficulties in the disciplines of science in particular in mathematics, physics, chemistry or computer science (misunderstanding of the course, too hard exercises, methods of inappropriate work)?

    Do not let the gaps accumulate and opt for quality support.
    Well, become an artist in mathematics, physics or even programming now.

    With more than 5 years of experience in coaching private lessons and training workshops, I followed more than 230 students from middle school, high school, bac + 2 in Maths-Physics and Computer Science. Passionate about science, in particular math-physics-computer science and especially teaching, I decided a few years ago to collaborate with tutoring companies and private schools.
    Indeed, transmitting knowledge, seeing students evolving and following them during their schooling is a real challenge but also a real satisfaction.
    I flourish particularly in teaching and I know perfectly the school programs and teach from primary to terminal.
    Beyond the simple teaching of mathematics, I strive to establish a pleasant and relaxed working atmosphere to encourage students to gain confidence. Such a working atmosphere and personalized support allow students to find the winning mentality they need to succeed.

    A pedagogue, attentive and enthusiastic, I offer simplified course materials as well as exercises and carry out regular assessments with the student and the parents to make a progress report.

    Methodology :

    My previous experiences have allowed me to identify in students with different profiles that the poor results in scientific subjects generally come from an inadequate methodology (not knowing how to read a statement, not knowing how to write mathematical reasoning ... ) and a lack of practice.
    As a trainer, I consider that my role is not only to teach the subject, but to give you the necessary tools that will allow you to progress sustainably and achieve your academic and personal goals.
    The first meeting aims to get to know the student starting from an analysis of their level, their strengths as well as their objectives, I define with him / her an educational strategy in terms of areas for improvement , working methods, frequency of lessons and supports used.
    On the basis of the observation, I establish with the student and his parents an educational assessment (concepts to be reviewed as a priority, work method, duration and frequency of lessons) aiming to best meet the student's objectives.

    Course of a typical session:

    The courses are generally structured in 5 stages:
    1. At the beginning of the session, I check with the student if he has done the work (homework, exercises, ...) requested by his teacher and I answer any questions he may ask: course points poorly assimilated, errors not understood ...

    2. From there, I take up with the student the points of the poorly assimilated course and I review with him the mathematical methodology: how to read a statement correctly, how to solve a mathematical problem. If the student has a check, I analyze with him his old homework on the table to analyze his errors and do better during the next check.

    3. I ask the student to do several exercises so that he can put into practice the concepts seen in class and appropriate the working methods seen together.

    4. Evaluate the student's understanding (direct questions, direct application exercises, validation of student cards).

    5. each lesson session, a summary point including:
    at. The concepts to know and some typical examples
    b. The main points of difficulty of the student
    vs. Tips and strategies to overcome these difficulties

    6. I give some exercises of a level of difficulty similar to those approached during the course to allow the student to review alone the concepts seen together and to assimilate his course durably. In case of difficulty, the student can at any time send me an email or call me so that I can help him from one session to another

    7. Summary point - Report of the meeting
    a- What was done during the session
    b- What the student could remember
    c- What the student should do for the next session.
    A- Homework help point, partial, test, white bac: review the whole course, do one (or more) year (s) together, identify the pitfalls to avoid and the tips to know.
    Internships are also organized during the holidays to allow my students to further improve their performance and strive for excellence.

    Benefits / differentiation:
    1- Free follow-up by phone (I would be available if the student has specific questions).
    2- The course can reasonably overflow without problem
    3- Patience and smile in all circumstances, proximity.
    4- Orientation assistance.
    I can move home, otherwise I also receive my students in the study room of my residence.
    Interested? To all parents concerned about the educational situation of their children, do not wait until it is too late, contact me and take it in hand by reserving my lessons now!

    Extra information

    Translated by Google. Click to view original.
    Make sure you have the necessary tools to facilitate the course.

    Location

    Online via webcam
    At student's location: Around Paris, France

    |
    Use ctrl + wheel to zoom!
    +

    General info

    Age:
    Teenagers (13-17 years old)
    Adults (18-64 years old)
    Student level:
    Beginner
    Intermediate
    Advanced
    Duration:
    60 minutes
    90 minutes
    120 minutes
    The class is taught in:French, English

    About Me

    Translated by Google. Click to view original.
    With more than 5 years of experience in coaching private lessons and training workshops, I followed more than 180 students from middle school, high school, bac + 2 in Maths-Physics and Computer Science. Passionate about science, in particular math-physics-computer science and especially teaching, I decided a few years ago to collaborate with tutoring companies and private schools.

    I flourish particularly in teaching and I know perfectly the school programs and teach from primary to terminal.
    Beyond the simple teaching of mathematics, I strive to establish a pleasant and relaxed working atmosphere to encourage students to gain confidence. Such a working atmosphere and personalized support allow students to find the winning mentality they need to succeed.

    Pedagogue, attentive and enthusiastic, I offer simplified course materials as well as exercises and carry out regular assessments with the student and the parents to take stock of progress.

    Education

    Translated by Google. Click to view original.
    Basic training: Mathematics, Computer Science and Electronics:
    - Senegal-Japan Professional and Technical Training Center
    -University Sorbonne Paris Nord
    -Polytechnique Sorbonne University

    Experience / Qualifications

    Translated by Google. Click to view original.
    2019- 2020: Private tutor in Paris:
    • Math teaching, from the Second to the Terminale L, S et ES
    • Teaching of Physics and Chemistry, from 4th to 12th grade L, S and ES
    • Homework help
    • Course explanation and tutorial

    August 2019: Computer trainer at UNICEF at the Salmaitou project boot camp:
    • Introduction to Algorithms and python, Arduino, Robotics programming
    • Introduction to website creation via HTML / CSS / WordPress
    • Introduction to robotics via arduino.


    January-May 2019: Professor, SABS school (Senegalese American Bilingual School).
    • Mathematics teaching level 5
    • Introduction to algorithm and python programming level 5th

    October 2015-June 2019: Private tutor / temporary teacher, with the Pédagogues group:
    • Math teaching, 5th to 12th grade L, S and ES
    • Teaching of Physics and Chemistry from 4th to 12th grade L, S and ES
    • Homework help
    • Course explanation and tutorial

    Ask a question

    Send a message explaining your needs and Mamadou will reply soon:
    The more detail, the better.
    Ex. "Hi, when are you available to meet for a lesson?"

    Availability of a typical week

    (GMT -04:00) New York
    MonTueWedThuFriSatSun
    0
      
      
      
      
      
      
      
    1
      
      
      
      
      
      
      
    2
      
      
      
      
      
      
      
    3
      
      Tuesday at 3:00
      
      
      
      Saturday at 3:00
      
    4
      Monday at 4:00
      Tuesday at 4:00
      
      Thursday at 4:00
      
      Saturday at 4:00
      
    5
      Monday at 5:00
      Tuesday at 5:00
      
      Thursday at 5:00
      
      Saturday at 5:00
      
    6
      Monday at 6:00
      Tuesday at 6:00
      Wednesday at 6:00
      Thursday at 6:00
      
      Saturday at 6:00
      
    7
      Monday at 7:00
      Tuesday at 7:00
      Wednesday at 7:00
      Thursday at 7:00
      
      Saturday at 7:00
      
    8
      Monday at 8:00
      Tuesday at 8:00
      Wednesday at 8:00
      Thursday at 8:00
      
      Saturday at 8:00
      
    9
      Monday at 9:00
      Tuesday at 9:00
      Wednesday at 9:00
      Thursday at 9:00
      
      Saturday at 9:00
      Sunday at 9:00
    10
      Monday at 10:00
      Tuesday at 10:00
      Wednesday at 10:00
      Thursday at 10:00
      
      Saturday at 10:00
      Sunday at 10:00
    11
      Monday at 11:00
      Tuesday at 11:00
      Wednesday at 11:00
      Thursday at 11:00
      
      Saturday at 11:00
      Sunday at 11:00
    12
      Monday at 12:00
      Tuesday at 12:00
      Wednesday at 12:00
      Thursday at 12:00
      
      Saturday at 12:00
      Sunday at 12:00
    13
      
      
      
      
      
      
      
    14
      
      
      
      
      
      
      
    15
      
      
      
      
      
      
      
    16
      
      
      
      
      
      
      
    17
      
      
      
      
      
      
      
    18
      
      
      
      
      
      
      
    19
      
      
      
      
      
      
      
    20
      
      
      
      
      
      
      
    21
      
      
      
      
      
      
      
    22
      
      
      
      
      
      
      
    23
      
      
      
      
      
      
      
    from 26€Online via webcam
    from 26€At student's home

    Good-fit Instructor Guarantee


    If you are not satisfied after your first lesson, Apprentus will find you another instructor or will refund your first lesson.

    Online reputation

    • Instructor since April 2020
    • Phone number verified

    Availability of a typical week

    (GMT -04:00) New York
    MonTueWedThuFriSatSun
    0
      
      
      
      
      
      
      
    1
      
      
      
      
      
      
      
    2
      
      
      
      
      
      
      
    3
      
      Tuesday at 3:00
      
      
      
      Saturday at 3:00
      
    4
      Monday at 4:00
      Tuesday at 4:00
      
      Thursday at 4:00
      
      Saturday at 4:00
      
    5
      Monday at 5:00
      Tuesday at 5:00
      
      Thursday at 5:00
      
      Saturday at 5:00
      
    6
      Monday at 6:00
      Tuesday at 6:00
      Wednesday at 6:00
      Thursday at 6:00
      
      Saturday at 6:00
      
    7
      Monday at 7:00
      Tuesday at 7:00
      Wednesday at 7:00
      Thursday at 7:00
      
      Saturday at 7:00
      
    8
      Monday at 8:00
      Tuesday at 8:00
      Wednesday at 8:00
      Thursday at 8:00
      
      Saturday at 8:00
      
    9
      Monday at 9:00
      Tuesday at 9:00
      Wednesday at 9:00
      Thursday at 9:00
      
      Saturday at 9:00
      Sunday at 9:00
    10
      Monday at 10:00
      Tuesday at 10:00
      Wednesday at 10:00
      Thursday at 10:00
      
      Saturday at 10:00
      Sunday at 10:00
    11
      Monday at 11:00
      Tuesday at 11:00
      Wednesday at 11:00
      Thursday at 11:00
      
      Saturday at 11:00
      Sunday at 11:00
    12
      Monday at 12:00
      Tuesday at 12:00
      Wednesday at 12:00
      Thursday at 12:00
      
      Saturday at 12:00
      Sunday at 12:00
    13
      
      
      
      
      
      
      
    14
      
      
      
      
      
      
      
    15
      
      
      
      
      
      
      
    16
      
      
      
      
      
      
      
    17
      
      
      
      
      
      
      
    18
      
      
      
      
      
      
      
    19
      
      
      
      
      
      
      
    20
      
      
      
      
      
      
      
    21
      
      
      
      
      
      
      
    22
      
      
      
      
      
      
      
    23
      
      
      
      
      
      
      
    from 26€Online via webcam
    from 26€At student's home

    Good-fit Instructor Guarantee


    If you are not satisfied after your first lesson, Apprentus will find you another instructor or will refund your first lesson.

    Share


    Salah Eddine
    Master Python with Courses Suitable for All Ages and Levels! Beginners, Intermediates, Professionals, Everyone is Welcome
    Master Python with Personalized Courses Discover the art of programming with Python courses tailor-made to meet your specific needs. Whether you are a beginner, intermediate or professional, my lessons are suitable for all levels. Why Choose My Courses? Personalized Teaching Approach: Each course is tailored to your skill level and individual goals. Practical Experience: Learn by doing with real-world projects that build your understanding and skills. Ongoing Support: Get unlimited email support for any questions you have between sessions. As a Python expert, I have a passion for teaching and sharing my knowledge. My goal is to guide you effectively in your learning journey. Book Your First Lesson: Start your journey to Python mastery now by booking your first lesson. Whether you aspire to enter the development field or hone your existing skills, these courses are designed for you.

    Youssef
    Analog and digital electronics, VHDL, FPGA, programming
    doctoral student in engineering sciences provides support courses in analog and digital electronics at any DEUG level and engineering schools. having scientific and technical knowledge, three years of experience in the field of teaching, pedagogy and a sense of listening and analysis, I am able to help pupils and students and train them in the chapters of which they are having difficulty. for more info please contact me

    Guillaume
    Scientific computing with the Python language
    I will assist you in learning or deepening your knowledge of the Python language for a professional or academic need for scientific applications. Of course, I will not address the need for you; however, it will serve to guide the course content in order to be as relevant and effective as possible. Otherwise, a traditional Python language training course might be more appropriate. In any case, do not hesitate to share your expectations with me; I will be happy to advise you.

    Pr YSF
    Electronics, Control of industrial systems, C/C++ VHDL programming, digital and analog electronics, MATLAB simulation
    Hello, I am a doctoral student in electrical engineering and associate professor in engineering sciences, experienced in the field of electrical engineering, I offer support courses in the subjects of engineering sciences (Electronics, automatics, electrical engineering, automation, programming). Digital electronics Analog electronic electromagnetism (propagation of high frequency waves) Automatic (continuous, sampled) electrical engineering (transformers, electrical machines, switching power supply) C / c ++ programming, Assembler, ARM, STM32 renewable energy (wind, PV) engineering Sciences RDM Python,VHDL PIC Microprocessor and Microcontroller Signal processing and data acquisition Engineering Sciences These courses allow the student to get up to speed and regain confidence in all scientific subjects, just as they prepare him effectively for the Baccalaureate, the Preparatory Classes or various examinations of the engineering classes. COURSE OBJECTIVES AND PEDAGOGICAL APPROACH Resumption and deepening of fundamental concepts through exercises with course reminders. Put the student in a situation of questioning and research. Respond to individual issues and questions Exercise training in order to achieve real mastery of the content. Learn to build theoretical reasoning from observable facts or hypotheses. Specific preparation for higher education requirements (in-depth content, increase in work capacity, enrichment of scientific background) This educational approach is effective since it has often led me to interesting results with my students. Associate professor provides support courses in electrical engineering

    Wissam
    Android: Programming mobile applications using Android Studio
    Doctor trainer in IT teaches you step by step how to design mobile applications for the Android system: Interface screen, access and storage of data, access to system services, management of notifications, Reading sensors, design of widgets, optimization. Notes: I teach the course, and I also support you at the development level (proposals, advice, debugging errors).

    Join
    🐍 Personalized Private Lessons – 💻 Learn to Code and Program in Python!
    Do you want to learn programming but don't know where to start? Are you a beginner looking for clear explanations, or do you want to improve your coding skills with personalized support? This private tutoring program is designed to help you master Python, one of the most versatile and easy-to-learn programming languages. Through a step-by-step approach, interactive exercises, and hands-on projects, you'll gain the confidence and skills to write code effectively and solve real-world problems. 💡 Why Choose this Program? With these personalized courses, you will: - 🚀 Learn at your own pace – Whether you’re a complete beginner or want to refine your skills, lessons adapt to your level. 🎯 Master the fundamentals – Understand key concepts like variables, loops, functions, and object-oriented programming. 🏗️ Complete hands-on projects – Work on real-world coding exercises, from simple scripts to mini-apps. 🐍 Develop problem-solving skills – Learn how to break down complex tasks and write efficient code. 🎓 Prepare for exams, jobs or personal projects – Whether you are a student, professional or enthusiast, Python is an essential skill. 💻 Get live support – Get real-time feedback, coding tips, and answers to your questions. This interactive, hands-on learning experience ensures you understand Python while having fun coding! 📚 What Will You Learn? This program covers everything you need to become comfortable with programming in Python: ✅ Python Basics (Great for Beginners) Introduction to Python and installation of the development environment 🖥️ Variables, data types and user input 🔢 Operators and expressions 🧮 Conditional structures (if-else) and loops (for, while) 🔄 Writing and calling functions 🏗️ 🚀 Intermediate Concepts (To Go Further) Lists, Tuples, Dictionaries – Understanding Data Structures 📊 File Management – Reading and Writing Files 📄 Exception Handling – Making Your Code More Robust ⚠️ Introduction to modules and libraries 🏛️ 🎯 Advanced Concepts (For the More Ambitious) Object-Oriented Programming (OOP) – Classes, Objects, Inheritance 🏗️ Recursion and algorithm design 🧠 API and Web – Connecting Python to the web 🌐 Introduction to Databases – Storing and Retrieving Data 🗄️ 🎨 Practical Projects & Applications Creating simple games 🎮 Automation of repetitive tasks 🔄 Data analysis with pandas 📊 Web scraping and working with APIs 🌍 Introduction to Artificial Intelligence and Machine Learning 🤖 (optional for advanced learners) 🎯 An Interactive and Fun Learning Experience Live Online Classes – Learn from home with interactive sessions via screen sharing. Tailor-made lessons – Content adapts to your level for an effective and personalized learning journey. Practical exercises and projects – Less theory, more practice! Learn with real-world examples. Caring and motivating environment – No pressure, no judgment: progress at your own pace. Practical application – Each concept learned is applied immediately through exercises and mini-projects. 🔔 For Who? This program is ideal for: ✅ Complete beginners – If you’ve never written a line of code, no worries! The lessons start from scratch. ✅ Students – To prepare for programming courses, computer science exams or competitions. ✅ Self-taught – If you want to add Python to your skillset, this course offers you structured support. ✅ Professionals and people in retraining – Python is a sought-after skill in data science, automation and web development. ✅ Tech Enthusiasts – Curious to learn code? This course makes learning Python both fun and useful. 🚀 Ready to Embark on Your Python Adventure? Join the "🐍 Personalized Private Lessons – 💻 Learn to Code and Program in Python!" Gain the skills and confidence to write clean, efficient, and powerful code. Sign up today and take your first steps into the exciting world of Python programming! 🔥

    Aniket
    AI Web Apps and Tools Mastery Classes | Practical Learning by Building Apps using AI (Langchain, OpenAI, HuggingFace, etc)
    Hello, I'm doing a PhD in AI and ML using Python and am an Oracle-certified trainer with 350+ reviews and ratings [with proof attached], I will be able to teach you Python better than any of my competition. Why choose me? 1. 300 + reviews and ratings 2. Certified tutor 3. More than 5 years of teaching experience 4. Worked as a Software engineer in companies like Virtusa Corp and DIGIDEZ DIGITAL SYSTEMS 5. Hold B.tech and M.tech in Computer Science Featured Review : Been trying to learn Java on my own for about 1 year and I couldn't get a grasp on it. Aniket make learning Java a fun experience and challenges you to think for yourself to reinforce the concepts you've learned. I am truly excited for our meetings and he makes time go by so fast that I'm upset when they end. Great teacher and he is genuinely passionate about your success. If I could give him more stars I would!!! Thanks Aniket

    Yassine
    Introduction to Robotics, Electronics and Programming
    Discover the world of robotics, electronics, and programming with a course designed for technology and innovation enthusiasts. Whether you are a beginner or already have some basics, this course will guide you through the fundamentals, with a hands-on approach to designing your own projects. You will learn how to use electronic components, program microcontrollers, and assemble robots to perform autonomous tasks.

    Aymen
    Programming: Introduction to Python (Beginner level)
    In this class, you’ll embark on an exciting journey into the world of programming with Python. You’ll start by writing your very first Python program, gaining hands-on experience from the get-go. As you progress, you’ll delve into the core fundamentals of Python, including variables, data types, control structures, functions, and modules.

    Wildric
    Programming🖥️, Computer Science, Programming languages, Help with projects
    Are you looking to master the world of computer science? Look no further! As a student at engineering school, specializing in computer graphics development, I'm thrilled to offer private tutoring sessions tailored to your needs. What I Offer: - Comprehensive instruction in computer science, both theoretical and practical. - Expertise in programming languages including C/C++, Python, Java, C#, and Rust - Hands-on guidance in understanding fundamental concepts and advanced techniques. - Personalized lessons to suit your learning style and pace. About Me: As a dedicated computer graphics developer, I've been involved in numerous projects, honing my skills and deepening my understanding of the field. Now, I'm eager to share my knowledge and experience with aspiring learners like you. Who Can Benefit: - Students seeking to strengthen their grasp of computer science concepts. - Individuals interested in diving into programming or advancing their skills. - Enthusiasts eager to explore the fascinating world of computer graphics. Whether you're a beginner or looking to expand your expertise, together, we'll unlock the secrets of computer science and programming.

    Mahmoud
    "Fun & Engaging Coding for Kids: Scratch, Python, AI & Web Development"
    Unlock the exciting world of coding with this beginner-friendly course designed specifically for young learners! 🚀 In this interactive class, children will explore the fundamentals of programming through engaging hands-on projects. We'll start with Scratch, a fun visual coding platform that builds problem-solving and logical thinking skills. Then, we'll dive into Python, one of the most popular coding languages, where kids will learn to create simple programs and games. Finally, we’ll introduce them to Artificial Intelligence (AI) concepts in an easy and exciting way! By the end of this course, students will: ✅ Build fun projects with Scratch 🎮 ✅ Write real code using Python 🐍 ✅ Understand basic AI concepts 🤖 ✅ Develop problem-solving & logical thinking skills This course is perfect for kids who love technology and want to start their journey into programming in a creative and enjoyable way!

    Azzedine
    Become a Trading Master with NinjaTrader: Personalized Courses Available
    Become a Trading Pro with NinjaTrader! Are you passionate about trading and want to master one of the most powerful trading platforms on the market? If so, this ad is for you! As a seasoned NinjaTrader expert, I offer personalized courses to help you master this exceptional trading platform. Whether you want to learn how to trade manually or automate your strategies using C# and custom indicators, I'm here to guide you every step of the way. My courses are designed for traders of all levels, from complete beginners to experienced professionals. Here's what you can expect: - In-depth training on using NinjaTrader, including navigating the interface, executing orders, and analyzing the markets. - Detailed instructions on creating and optimizing automated trading strategies using C#. - Practical advice on using custom indicators to refine your technical analysis and make informed trading decisions. Whether you are looking to generate additional income through trading or make trading your full-time career, my courses will provide you with the knowledge and skills needed to succeed in the financial markets. Don't miss this opportunity to become a true trading expert with NinjaTrader! Contact me today to reserve your spot and begin your journey to financial success.

    Mehdi
    Spring boot: Security / Batch and Quarkus Framework
    As a specialized Spring Boot instructor, my primary goal is to expertly guide you in mastering this leading Java development framework. Spring Boot is a flagship tool that has revolutionized the way Java applications are created, whether developing dynamic web applications, agile microservices, or robust enterprise applications. My teaching approach focuses on gaining a solid understanding of Spring Boot fundamentals, with an emphasis on essential concepts such as inversion of control, dependency injection, and automatic configuration. We'll also dive into more advanced topics, including security, data management, and building successful RESTful APIs. Throughout our training sessions, you will develop practical skills to build efficient and stable Java applications, using proven coding techniques as well as modern development tools specifically designed for Spring Boot. My goal is to make you a competent Spring Boot expert, capable of creating robust, scalable applications that meet industry standards. To summarize, my Spring Boot courses are suitable for all levels, from beginners to experienced developers, and are customized to meet your development needs and aspirations. I'm excited to work with you to help you master Spring Boot and bring your most ambitious development projects to fruition.

    Francisco
    PROJECT SUPPORT Python, R or Matlab with PhD student in Geophysics with 7+ years of experience
    Welcome to my Programming Projects Support class! Are you facing hurdles with your programming projects? Let's tackle them together! As a Geophysics PhD student, I rely heavily on programming tools like Matlab, Python, and R for data analysis, mathematical modeling, plot results and much more. After a lot of requests from students I created this course which is specifically meant to give you support completing your final programming projects. Here's what you can expect: - We'll review your project's background and requirements. - Analyze your coding progress and identify areas for improvement. - Collaborate to overcome obstacles, debug your code and advance your project. - Tailored sessions based on your project's complexity and your skill level. Whether you require a single session or a series of in-depth consultations, my goal remains the same: to help you break through programming barriers and achieve your goals. Ready to level up your programming skills? Let's get started! Please note: This is a support course only ! While I'm here to guide you, the project's success lies in your hands and I will not finish your project for you.

    Jay
    Computer skills( Programming, Excel, Word, Powerpoint ,....)
    Experienced teacher with a great passion for teaching. My background is in both engineering and management fields with one bachelor's and two master's degrees. I have a good background in Python programming and Microsoft office (Word, Excel, PowerPoint, Access,...) and statistics. I am also able to teach online if you would like. You will receive full support during and after each course with high quality and minimum price. For University/High school/Primary school students.