Simulation data matlab nntool jobs

I'm in need of a hydrodynamics expert who can assist in creating a fluid flow simulation with the primary goal of focusing on the basic flow patterns. رسم شبكة مياه باستخدام لمدرسة epant Key Requirements: - Expertise in Hydrodynamics: Sound knowledge and hands-on experience in hydrodynamics is a must - Fluid Flow Simulation: Proficiency in creating fluid flow simulations, especially focusing on basic flow patterns - Software Proficiency: Experience in utilizing relevant software tools for fluid dynamics simulation The ideal freelancer for this project should be able to deliver detailed, accurate and efficient results. Your work will help me gain a better understanding of the fluid dynamics involved in the system.

I am in need of an Excel expert who can assist me predominantly with data analysis tasks. More specifically, the ideal individual should be adept at: - Utilizing Excel effectively with the @Risk add-on, - Performing a Monte Carlo simulation to analyze risk, - Wielding strong analytic capabilities to interpret and communicate the simulation's results. The task will require a deep understanding of data analysis techniques, a keen eye for detail, and fluency in data visualization. This role is perfect for seasoned Excel professionals with past experience in risk analysis and simulation.

...seeking a highly skilled and experienced Airflow and Heat Simulation Specialist to evaluate and optimize the ventilation systems of our crypto mining facilities. Each site encompasses an industrial unit under 200 square meters, requiring detailed analysis to ensure operational efficiency and safety. Responsibilities: Conduct detailed airflow and heat simulations to assess the current ventilation efficiency. Identify potential areas of improvement and provide actionable recommendations. Work closely with our on-site team to understand the specific configurations and requirements of each location. Deliver comprehensive reports summarizing findings and suggesting optimizations. Requirements: Proven expertise in airflow and heat simulation, specifically within industrial en...

I'm in search of an experienced Metaverse developer to design an engaging platform focused on teaching users about planting. Key Features -...challenges, and answering quizzes related to the videos. - Room 3: Assessment Hub featuring hands-on simulations as a means of reinforcing the knowledge acquired. Skills and Experience - Extensive experience in metaverse development and virtual reality is essential. - Familiarity with educational platform design can be a plus. - Ability to integrate video content, interactive challenges and simulation assessments into the platform. - I'm particularly interested in developers who can craft engaging, user-friendly environments to promote knowledge acquisition and application. Can't wait to work with someone to bring this innov...

I'm seeking an experienced programmer to develop a high-end cyber simulation for educational purposes. The simulator is intended to deliver training on malware analysis, computer systems and SCADA.   Goal: Explain how the USB and external hard drive are risky to the operating environment.   Awork explanation: Provide an operating system and install a program to simulate the SCADA system interface to show how operations work. I will use an external hard drive on the computer, and the process will stop and send a red warning as a result the operations will stop.   Deliverables: OVA image "Vmware" File to be installed on an external device Ideal Skills and Experience: - Proven experience in developing interactive simulations - Familiarity with cybersecur...

Make a Strategy and Simulation game using Unity.

...Construct a simulation model using the information provided to you above, and your average model as the starting point. a. Unit of interest – a DNA sample collected by a CSI. That is, each sample must be modelled individually. b. Each iteration of the simulation is one week of processing samples. c. Use the same assumptions as for the Task 2 model. d. You MUST use @RISK. Do NOT save raw simulation data in the file. e. You must save all your work in one file saved on your OneDrive account. There are no exceptions to this. See Saving and Sharing instructions on pages 10-12. f. You will need to determine the appropriate probability distribution for each input. g. Run the model for 10,000 iterations. h. Set the random number seed to the customer id. 4. Re...

I need a competent app developer to create a web and mobile application that includes a virtual try-on feature for jewellery. This cross-platform application should be developed for both iOS and Android markets. Key Features: - Virtual try-on: A real-time simulation that offers customers an opportunity to virtually wear and experiment with various jewellery pieces before making a purchase. - Product catalogue: A well-categorized catalogue comprising the full range of jewellery items available in the store. - User registration: A secure registration portal where users can create personalized accounts, save their favourites, and make purchases. I haven't decided on a specific theme or design yet, so I am open to suggestions. The design should, however, be clean, intuitive, and...

I'm in need of a skilled freelancer who can create an Ansys model for an electric vehicle battery design. The primary focus will be on thermal management and electrical configuration, so experience in these areas is crucial. Key Requirements: - Create an Ansys model for a battery designed for electric vehicles. - Expertise in therm...electrical performance of the battery. Ideal skills and experience for this job: - Strong background in Ansys software, particularly in the field of battery design for electric vehicles. - Experience in thermal management and electrical configuration of battery systems. - Strong understanding of the requirements and challenges in designing batteries for electric vehicles. - Ability to translate simulation results into practical recommendations fo...

...Construct a simulation model using the information provided to you above, and your average model as the starting point. a. Unit of interest – a DNA sample collected by a CSI. That is, each sample must be modelled individually. b. Each iteration of the simulation is one week of processing samples. c. Use the same assumptions as for the Task 2 model. d. You MUST use @RISK. Do NOT save raw simulation data in the file. e. You must save all your work in one file saved on your OneDrive account. There are no exceptions to this. See Saving and Sharing instructions on pages 10-12. f. You will need to determine the appropriate probability distribution for each input. g. Run the model for 10,000 iterations. h. Set the random number seed to the 5052. 4. Results t...

I need a proficient simulation expert who can model the airflow through Louvres in an industrial building setting. The key drive behind this project is to improve ventilation efficiency, minimizing energy waste, while remaining fully functional. Expected Deliverables: - Simulation of airflow within the identified industrial environment. Required skills and expertise: - Excellent understanding of airflow principles and simulations. - Proficient in utilizing simulation software. - Real-world experience with industrial ventilation systems is a plus. - Strong communication to effectively discuss simulation results. Preferably, the final output should be delivered as a video simulation, providing a dynamic view of the air circulation process. This project ...

Assalam o alaikum, I am looking for a MATLAB expert with good expertise in the field of control system design. Freelancer should be capable of writing reports too with detailed explanation of the circuit and complete project. Final report should be well structured and properly formatted with cover page, table of contents, list of figures, references. If you use any figure, table or diagram in the report, there should be a proper caption for it. Plagiarism should be below 10% using ChatGPT or AI is highly discouraged.

I'm looking for a Cisco Pa...Cisco Packet Tracer developer to assist with network troubleshooting and simulation. The ideal candidate should be at an entry-level proficiency with relevant experience and a good understanding of routers, switches, and wireless devices. Key Responsibilities: - Network Troubleshooting: Diagnosing and rectifying network issues in a simulated environment. - Network Simulation: Designing and implementing network scenarios using Cisco Packet Tracer. Ideal Skills and Experience: - Entry-level proficiency in using Cisco Packet Tracer. - Understanding of network troubleshooting methodologies. - Familiarity with routers, switches, and wireless devices. Your responsibilities will mainly focus on troubleshooting and simulation, so prior expe...

...Casino-Themed Roblox Simulator or Jackpot game. I already have some exciting ideas of my own, and some appealing games in mind that we can potentially incorporate. The main game mechanics to be included are: - Gambling Mechanics: Players should be able to place bets and win or lose based on chance. - Virtual Currency Mechanics: An in-game currency system should be implemented for betting. - Simulation Mechanics: The game should have realistic elements that replicate a real-life casino experience. The core theme of the game will be "Casino". The game should be filled with the glitz, glamour and excitement of an actual casino, making it fun and engaging for the users. We're also looking to make the game highly interactive by incorporating the following aspects: ...

I am seeking a CFD professional with extensive experience in both ANSYS and SolidWorks to assist me with running a simulation for a water wheel turbine system. The primary goal of this simulation is to optimize the turbine's efficiency. Key tasks include: - Setting up and executing the simulation in SolidWorks 2020 - Analyzing results to identify potential inefficiencies and areas for improvement Ideal candidates should have: - Proficiency in ANSYS and SolidWorks, as per the versions specified - A proven track record in CFD simulations - Experience in optimizing turbine efficiency would be a significant advantage - Strong analytical skills to interpret simulation data accurately - Excellent problem-solving capabilities If you are confident in your...

I am looking for an expert who can deliver a virtual simulation of a complete biogas power plant system. This includes both mechanical assemblies and the biogas engine. The power output target for the plant is 2 MW. The key tasks that need to be fulfilled are: - Generate a comprehensive model and simulate the same in a platform like PS CAD, Matlab or any others suitable for such tasks. - Perform a thorough operational stability assessment. This should include an in-depth analysis covering all aspects of the power system and not just basic functionality. The critical objective of the project is the evaluation and optimization of the biogas engine's performance. Therefore, the freelancer should possess: - Proficient knowledge in simulating complex systems, particularly...

I am in need of a skilled Python programmer to spearhead the development of a brand new simulation software, specifically designed for educational purposes. The job entails writing fresh python codes, with the primary aim of creating a simulation software that will offer: - Customizable Simulation Parameters: The software should allow users to tweak and customize various parameters in the simulation, providing an interactive and adaptable learning environment. As a successful candidate, you should have a strong programming background in Python and experience in software development. Knowledge or experience in working with simulation software, especially in an educational context, would be a big plus. The ability to effectively translate user needs into ...

...to make a 3d simulation of a meal prep process with gantry cnc machines. I want to simulate this process: Meal Prep Sunday Timelapse With cnc machines like this: XYZ Gantry System - Pick and Place and Precision Handling Demo (so no arms, just gantry) High level, Cnc machine will: Take ingredients out of bags / refrigerator Rish ingredients Cut ingredients them Cook ingredients on stove Pack cooked food in plastic containers Place plastic containers back in refrigerator Wash pots This first phase does not have to be interactive. (I could use 3d Studio or Blender, but eventually I want the simulation to interactive)

I am in need of an experienced 3D designer who can help me bring my floor plan to life with an interactive walk through simulation. The primary purpose of this simulation is for design validation. Key Requirements: - The simulation should be highly interactive, allowing users to explore every detail of the space. - The floor plan is already designed, your focus will be on creating the 3D walk through based on this design. Ideal Skills and Experience: - Proficiency in 3D design and animation. - Experience in creating interactive and detailed 3D simulations. - Strong attention to detail, as accuracy in translating the floor plan into 3D is crucial. - Prior experience with design validation projects would be an advantage. While I don't have a specific software o...

I require an advanced user of Ansys. You'll be dealing mostly with structural mechanics simulations and analysis. An understanding of explicit dynamics is ideally needed. Your tasks will include: - Carrying out simulation and analysis tasks - Working specifically with structural mechanics - Handling intermediate complexities like explicit dynamics A strong theoretical and practical knowledge of Ansys in structural mechanics is essential, and previous experience with intermediate level complexities will make you a stand-out candidate.

I'm in need of a highly skilled VR developer who can design and build a VR simulation targeted for industry professionals in the real estate sector. The end product should facilitate realistic and immersive experiences of property walkthroughs. REQUIREMENTS: - Strong expertise in VR simulations - Previous experience in creating VR content for a professional audience - Familiarity with the real estate industry Freelancers who have completed similar projects will be given priority consideration. Please provide a portfolio of your previous VR work in your bid.

We're seeking an experienced professional to carry out a general Battery project revolving around Matlab. No specific facet requiring emphasis has been pinpointed, thus the professional should be prepared to examine battery performance analysis, battery management system design and battery charging optimization. Skills required: - Expertise in Matlab - Understanding of Battery systems and their Optimization Experience with battery systems and Matlab is highly desirable. We need a flexible approach, capable of dealing with potential shifts in focus, as specific requirements for battery capacity or voltage have not been provided, nor has the intended use case for batteries been identified. This could range from electric vehicles, renewable energy storage, to por...

I'm in need of a knowledgeable and experienced freelancer to assist with the simulation aspect of a solar photovoltaic system using Matlab. Key Tasks: - Conduct a comprehensive simulation of the system - Provide reports and interpretation on varies aspects of the simulation Due to the client's omission on the specific focus and performance metrics, the freelancer must be capable of conducting an all-encompassing simulation. Ideal Skills: - Extensive experience with Matlab - Broad understanding of solar photovoltaic systems - Capacity to interpret and present simulation results efficiently - Ability to conduct a thorough simulation without specific focus points. I look forward to collaborating with you on this pro...

...the code should run. Here's what I'd like help with: 1. Simplification. I made this for my research. Thus there are likely portions that could be cut if it's a general environment. Also open to reorganization of the environment if there's a better way to accomplish. 2. "Branding." My plan is to make RL with high performance aircraft as accessible as Atari, Mujoco, etc. Typically vendors hold simulation efforts closed source. Not looking to make a marketing campaign necessarily, but would like your thoughts on how to best reach the audience, aviation enthusiasts. 3. CI/CD. Hoping to publish this on gym as well as push to github in a docker container. Could use guidance on that process and a plan for CI/CD moving forward. The state vector can ...

Looking for a Fusion 360 expert for 3D modeling which will later be used for product animation. Ideal Skills and Experience: - Proven background in using Fusion 360 for 3D modeling - Previous experience with product design and simulation - Knowledge in creating 3D models suitable for animation Tasks Involved: - Creation of a 3D model aligned with the specifics of the product to be animated - Adjustment of model elements as per the needs of animation The animated 3D model will be primarily utilized in a product setting. Please include previous projects of this nature in your proposal.

1- A Revit File (Design dormitory-3 Levels) 2024Version 2- 3 Sheets-Plan Views 3- 4 Sheets-Elevations 4- 1 Sheet-Section 5- A Nawiswork File 6- A 4D simulation video mp4 7- A walk-through animation(Less than 5 minutes) 8- 2 clash detections report( 0.1meter tolerance and 0.001meter tolerance)

...simulations. The project involves creating a captivating and luxurious contemporary styled simulation of a street, complete with our villas, and a comprehensive glimpse of the apartment interiors. Key Responsibilities: - Create a high-quality 3D render of villas and apartments. - Develop a video simulation offering a virtual tour of the property. - Ensure the style aligns with a luxurious contemporary aesthetic. Ideal Skills for the Job: - Prior experience with Architectural Visualization. - Mastery in 3D rendering and animation software. - Strong understanding of interior design and architectural principles. - Eye for detail and creating high-quality, realistic visuals. The objective behind this video simulation is not only to offer a realistic overview of o...

...for the video game genre of Strategy/Simulation. Key Requirements: - Low Poly: The models should be optimized for performance and rendering in video games, with a focus on minimal polygon count without compromising quality. - Game-Ready: Prior experience with creating assets for video games, understanding the technical requirements, and ensuring the models are perfectly suitable for game engines. - Strategy/Simulation Genre Knowledge: An understanding of the specific requirements and aesthetics of Strategy/Simulation games is highly preferred. Ideal Skills: - Proficiency in Blender or similar 3D modeling software. - Strong portfolio showcasing low poly models, especially for video games. - Experience in creating assets specifically for Strategy/Simulation ...

I'm seeking an expert in data communication and computer networking with proficiency in Matlab. You'll conduct a comprehensive, simulated investigation into two interrelated aspects: Virtual Private Networks (VPN) under the wider umbrella of network security, and wireless networking. Main tasks include: - Implementation of VPNs and wireless networking in a Matlab simulation - Explore the interactions and mutual implications of these topics - Produce a journal-like paper detailing your findings, guaranting originality and no plagiarism This project requires a unique grasp of data communications, computer networking, and VPN. Ideal candidate should have strong Matlab abilities and a knack for clear, concise, academic-style writing. The ...

I'm seeking an expert in data communication and computer networking with proficiency in Matlab. You'll conduct a comprehensive, simulated investigation into two interrelated aspects: Virtual Private Networks (VPN) under the wider umbrella of network security, and wireless networking. Main tasks include: - Implementation of VPNs and wireless networking in a Matlab simulation - Explore the interactions and mutual implications of these topics - Produce a journal-like paper detailing your findings, guaranting originality and no plagiarism This project requires a unique grasp of data communications, computer networking, and VPN. Ideal candidate should have strong Matlab abilities and a knack for clear, concise, academic-style writing. The ...

I'm looking for a skilled game developer to create a PC simulation game with realistic 3D visuals. Your task will involve generating a captivating and immersive environment that matches my concept seamlessly. Key responsibilities: - Design and develop a PC simulation game - Incorporate realistic 3D graphics for enhanced gaming experience Ideal Expertise: - Proficient in game development for PC - Skilled in creating simulation games - Strong capabilities in the creation of realistic 3D graphics Your expertise should eventually translate to a game that balances functionality and creativity, while captivating users with its gripping simulation and realistic design. I'm excited to work with a developer who can bring my vision to life.

I'm looking for an experienced programmer who understands MATLAB inside and out. Specifically, I need someone capable of optimizing a data analysis script. This script primarily uses arrays and matrices as its predominant data structures. It's crucial that you excel in: - MATLAB programming - Optimizing code for efficiency - Deep knowledge and understanding of working with arrays and matrices data structures If you are an expert with these requirements and have the know-how to streamline and optimize for speed and stability, your skills are highly valuable in this project. I look forward to reviewing your bid!

Need C# developer to integrate zatca and below actions, Prefer to develop a rest Api to call zatca and input parameter will provide invoice in Json. Anyone has previous experience on zatca integration is preferred, we need to complete as soon as possible. 1. Create CSR certificate 2. Compliance Invoice with simulation and production 3. Clear Invoice with simulation and production 4. Report Invoice with simulation and production Note: We need source code, and it should be configured on our system.

I need to implement an electric arc model (heuristic model) in photovoltaic systems to simulate all the conditions present in the IEC 63027 standard. The simulation should be conducted in Simulink. If you are able to create this model, please send a message so we can discuss it further. Ideal skills and experience for this job include: - Proficiency in Simulink and simulation software. - Expertise in physics and electrical engineering to model the physical behaviors accurately. - Experience with photovoltaic systems and electric arcs is a plus.

Matlab Simulation Battery Optimization Urgent Work

...performance through Matlab simulation. Due to the project specifics not being clarified, the professional should be comfortable and experienced in working with a range of battery types such as Lithium-ion, Lead-acid battery and Nickel-metal hydride batteries. Key points to consider for this project: Skills and Experience • Understanding and experience in working with various battery types • Proficiency in Matlab for creating simulations and testing • Strong analytical modeling skills Project Objectives • Provide research and suggestions on optimizing battery life, decreasing charging time and improving power output. • Develop a comprehensive Matlab model suitable for variety of scenarios. • Evaluate opt...

I need an expert in MATLAB for operational medical equipment reliability data analysis. The main focus of this project will be to perform reliability analysis for a specific data set. This is for a methodology section of a dissertation with the title Operational medical equipment reliability. Tbis will need to include maximum likelihood and a weibull distribution. I have attached the relevant data set and the dissertation so far. Thankyou. This will need to be completed by Tuesday 23rd April maximum. Key requirements: - Strong proficiency in MATLAB - Experience in reliability analysis - Understanding of medical equipment is a plus The goal of this project is to provide a comprehensive reliability analysis report. Your familiarity with medical equipmen...

I'm in need of a skilled Matlab programmer who can help me with creating visual representations for my equipment reliability data. I have attached the data. I will need the maximum likelihood and a weibull distribution doing. Key Points: - I'm looking for both basic and potentially more advanced visualizations - so your experience with Matlab and data visualization is crucial. - The data we'll be working with relates to equipment reliability. If you have experience in this area, that would be a great advantage. - I'm not sure yet about the specific types of graphs required. Your advice and input on this will be appreciated. Please share your previous relevant work, and how you'd approach this project. Your understandin...

I'm seeking a well-versed robotics engineer to join my project, specialising in the simulation, programming, and troubleshooting of complex systems. The role involves work on various types of robots, specifically including industrial robots and autonomous vehicles. Key Responsibilities: - Robot design - Programming, Testing and troubleshooting - Control and Perception Ideal Skills and Experience: - Proficiency in C++, Python, ROS, and Isaac Sim is essential. - Prior experience with industrial robots and autonomous vehicles is important - Perception and control for two armed robot A comprehensive approach paired with a keen understanding of robotics engineering is critical for success in this project.

I am in need of a Matlab simulation expert. However, I am currently unsure of the specific task or simulation that requires assistance. I'm looking a couple of Matlab expert who has skills about Fuzzy logic and Solor system. Deadline: 2-4 days

Task: The padding techniques for evaluating the algorithms using PSNR of image in MatLab Hi, As discussion. I can support you for new task Time-line: 7 days A fixed fee: 35 USD Thanks Phong Nguyen

I'm in immediate need of a seasoned Matlab expert for: Some Problem calculations Ideal applicants should have extensive experience in these areas and demonstrate a thorough understanding of the latest, Matlab 2023. Time is of utmost importance in this project, hence, I need someone ready to jump in and get to work straight away. Your bid should reflect an understanding of these requirements and your readiness to meet the fast-approaching deadline.

...Simulink. Leveraging your knowledge, I need assistance in modeling simulation, establishing an effective control system design, and performing signal processing. Key responsibilities: - Build a model simulation - Design a stringent control system - Perform signal processing Although the specific task was not clarified, I value a freelancer who can dynamically adjust to the task at hand. Hence, your application should highlight your past work, experience, and a detailed project proposal–these are essential components to your success in this project. The ideal freelancer should display: - Excellent knowledge of Simulink - Previous experience in model simulation, control system design, and signal processing - Proficiency in MATLAB, and Simulink Blo...

I need a professional with extensive experience in Fuzzy Logic and Matlab. Since I haven't defined the exact task or domain, I anticipate your ability to tackle various applications ranging from control system design, pattern recognition, forecasting, robotics, financial analysis, to traffic control. The final output, yet to be specified, could be anything from improved system performance, enhanced decision-making, or better data analysis. Since the assignment specifics are yet to determined, I require someone who is flexible, creative, and solutions-oriented. Matlab proficiency is a must.

I'm looking for a Python expert to help me set up a pipe network simulation and analyze the pressure data for detecting potential water leaks. The primary goal of this project is to simulate a water pipe network and subsequently identify potential leaks using pressure drop analysis. The simulation should be able to model the flow and pressure properties of a complex network of pipes. Key tasks: - Setting up the pipe network simulation using Python - Conducting pressure drop analysis for leak detection - Providing an intermediate level of detail in the analysis report - this should include the locations and estimated sizes of the potential leaks Ideal candidates for this project should have: - Proven experience in Python programming - Understanding of h...

I am looking for an expert who can use Cisco Packet Tracer to perform a variety of tasks including network simulation, network design, and troubleshooting. Although the type of network to be simulated or designed was not specified, the project will involve the inclusion of switches and routers. Ideal candidates should be familiar with these devices and possess the necessary skills to integrate them into a comprehensive network design. Your expertise in network simulation and troubleshooting will be critical in ensuring the success of this project.

...from a small-scale experimental study detailed in the attached research paper to an industrial application focusing on a flue gas stream solely made up of CO2 and N2. This comprehensive investigation can be based on specific equations, data, and parameters that will be provided from a relevant paper. Duties and Responsibilities: - Understand the Base Model: Analyze the experimental study to grasp foundational models and calculations. - Industrial Sensitivity Analysis: Utilize any effective method to scale up these findings to industrial levels. - Use MATLAB, Excel, or any other tool to conduct a detailed sensitivity analysis based on the equations given - Document each step of the analysis clearly, ensuring that any reader can follow the process and results seamlessly. ...

...performance through Matlab simulation. Due to the project specifics not being clarified, the professional should be comfortable and experienced in working with a range of battery types such as Lithium-ion, Lead-acid battery and Nickel-metal hydride batteries. Key points to consider for this project: Skills and Experience • Understanding and experience in working with various battery types • Proficiency in Matlab for creating simulations and testing • Strong analytical modeling skills Project Objectives • Provide research and suggestions on optimizing battery life, decreasing charging time and improving power output. • Develop a comprehensive Matlab model suitable for variety of scenarios. • Evaluate opt...

I'm seeking a skilled microcontroller programmer for translating our control strategy into a code compatible with a dsPIC microcontroller. This code should be able to handle inputs of both voltage and current. The key features of...code, you should provide thoughtful documentation and comments so we can understand your strategies and algorithms. I am not specific about setpoints for voltage and current, so the approach should be adaptable. Ideal freelancers should possess the following skills and experience: - Strong understanding of PI control strategies - Fluency in microcontroller programming - Ability to translate MATLAB code into different languages - Problem-solving mindset to adapt to shifting parameters In your bid, please share relevant experience relating to thes...

I'm in need of an expert Unity game developer with a deep understanding of 3D graphics and animation to create an engaging shooting game. The eyes of would-be players should be treated to stunning 3D visuals. Optimal Skills: - Expertise in Unity game development, specifically shooting games - Proven experience with 3D graphics and animation - Knowledge of physics simulation would be a plus - Familiarity with Flutter for integration and deployment The game would be primarily directed towards mobile users through Flutter. The intent is to offer gamers a graphically interesting and dynamic shooting game that they can enjoy on the go. Developers making a bid should have a strong portfolio in Unity-based game development.