Freelance revit architecture jobs일자리
오토데스크사의 Revit, Navisworks 그리고 오라클 프리마베라 P6 를 이용하여 회사내 업무목적으로 프로그램을 개발하려고합니다. Revit 과 Navisworks 에서 필요한 도면과 정보를, P6 에서는 공정표와 공정률정보를 한 프로그램에서 로드할수 있게끔 개발하려 합니다. 페이는 더 상세한 내용이 오가고나면 기간에따라 협의합니다.
한국 인터넷 사이트를 외국인한테 설명하는 글을 써주세요. 모든 단계를 다 설명해야 합니다. 스크린샷도 첨부하면서 영어로 설명하면 됩니다. 1. I need a Korean freelance or speak Korean for a project. 2. please only people who are from Korea or who speak good Korean.
We are looking for freelance Pilates Instructor for Demonstration at IHRSA 2014 exhibition in San Diego CA. 2014 Working Time: 10.00 a.m. - 05.00 p.m. $30 per/hour We prefer a person who lives in San Diego. 안녕하세요. 저희 케어 필라테스에서 IHRSA 2014에 함께 하실 필라테스 강사분을 모십니다. 근무시간은 14일 오전10:00부터 오후05:00까지이며 시간당 $30을 지급할 예정이나 조정 가능합니다. 로 자세한 사항 문의 바랍니다.
I'm in need of a skilled web designer and developer from Latin America who possesses a strong modern design vision. Your portfolio should reflect a clean, professional, and contemporary aesthetic, aimed at creating impactful, user-friendly, and visually stunning corporate websites. This is a freelance role, and I am looking for a professional who can collaborate on a project-by-project basis. For this particular project, I require the creation of a 5-page corporate website. While the exact layout and content will be discussed, expect to include standard pages like Home, About Us, and Contact. Ideal candidates should: - Have a strong portfolio of modern, minimalistic web design - Possess excellent web development skills - Be based in Latin America - Have experience creating w...
...leaderboards. Content Library: Access training tips, techniques, drills, and injury prevention guides. 4. Recruitment & Career Opportunities Talent Showcases: Allow scouts and recruiters to find emerging talent through highlight reels and stats. Job Listings: Postings for coaching roles, sponsorships, or team positions. Tryout Announcements: Promote upcoming team tryouts or open scouting events. Freelance Opportunities: Short-term roles like sparring partners, guest coaching, or event speaking. 5. Events & Tournaments Event Calendar: Centralized hub for upcoming tournaments, matches, or workshops. Event Registration: Easy sign-up for tryouts, camps, or tournaments. Virtual Events: Live streaming of games, training sessions, or expert panels. Networking at Events: Connec...
Hello Kahmid, As discussed, we are still having "Customer Jobs" being added automatically by the web connector in Quickbooks, when syncing orders. There should be NO CUSTOMER JOBS,
...(Mobile Money, Stripe, PayPal, etc.). Notions de sécurité (authentification, gestion des données sensibles, cryptage). Connaissance du marché africain (ou volonté de s’y adapter) est un plus. Savoir concevoir une architecture modulaire, évolutive et robuste. Bonne compétence en UI/UX : l’application doit être intuitive et responsive. Intégration possible avec des services de messagerie (chat en direct, notifications push). Livrables attendus Version MVP fonctionnelle pour chaque catégorie (organisation, billetterie, marketplace). Documentation technique (choix technologiques, architecture, instructions de déploiement). Tests unitaires et d’intégration garantissant la qualit...
I'm a marketing agency owner focusing on promoting event venues and related services. I'm seeking a talented freelance SEO expert, primarily skilled in Technical SEO, to join my team. Key Responsibilities: - Enhance the online visibility of our venues through effective SEO strategies. - Prioritize and execute technical SEO tasks, specifically: - Site speed optimization to improve user experience and search engine rankings. - Ensuring mobile responsiveness of our sites to cater to the increasing number of mobile users. - Fixing crawl errors to ensure all parts of our website are accessible to search engines. Ideal Skills and Experience: - Proven expertise in Technical SEO, with a strong emphasis on site speed and mobile responsiveness. - Experience in working wit...
I'm looking for a seasoned professional with advanced knowledge in SQL database architecture. The primary task will be designing a new database. Ideal Skills and Experience: - Extensive experience with SQL - Proven track record in database design - Ability to understand and meet project-specific requirements - Strong problem-solving skills - Excellent attention to detail
We are seeking a talented and experienced freelance UI/UX designer to revamp the website for Vibranium, a leading company specializing in website UI/UX design. The ideal candidate will be responsible for enhancing the user experience, creating visually engaging layouts, and improving the overall interface design. The project will focus on delivering a sleek, modern, and intuitive design for our business portfolio website, ensuring it is responsive and optimized for both desktop and mobile users. Key Requirements: -Proven experience in UI/UX design, with a strong portfolio -Proficiency in design tools (Figma, Adobe XD, Sketch, etc.) -Knowledge of web development technologies (HTML, CSS) -Understanding of SEO-friendly design practices -Ability to incorporate user feedback and collab...
I'm in need of a competent office clerk who can assist with data entry and handle some odd jobs around the office. The prime responsibilities will include: - Data Entry: Accurately inputting and managing data in our systems. - Maintenance Tasks: Assisting with basic upkeep of the office. Skills and experience ideal for this role would include: - Proficiency in data entry. - Strong organizational skills for office maintenance tasks. - Ability to handle odd jobs with a positive attitude. Please note this is not a customer service or scheduling role, but a hands-on position requiring a proactive and diligent individual.
Chemical Engineer Needed for Creating Industrial Chemical Datasheets and Catalogs **Description:** We are looking for a freelance Chemical Engineer with expertise in industrial chemicals to create professional datasheets and catalogs for our products. **Requirements:** - Research and compile technical specifications and industry applications. - Prepare datasheets and catalogs in editable formats (Word, Excel, and PDF). - Ensure the output is professional, accurate, and visually appealing. **Skills Required:** - Strong knowledge of industrial chemicals. - Proficiency in Microsoft Word, Excel, and PDF tools. - Excellent research and writing skills.
I'm looking for a professional who can help me model a conceptual stage residential project in SketchUp. - You'll need to modify existing 3D models with proposed changes. - The level of detail required is basic, focusing on the structure and layout, rather than the interior or exterior details. Ideal candidates will...looking for a professional who can help me model a conceptual stage residential project in SketchUp. - You'll need to modify existing 3D models with proposed changes. - The level of detail required is basic, focusing on the structure and layout, rather than the interior or exterior details. Ideal candidates will have extensive experience with SketchUp and a strong understanding of residential architecture. Please include examples of previous simi...
We are seeking a skilled Meta Ads Expert to run a B2C lead generation campaign focusing on the loan/debt settlement industry. The ideal candidate will have hands-on experience with creating, optimizing, and managing Meta (Facebook & Instagram) ad campaigns that generate high-quality leads. This is a freelance position with an immediate start. Key Responsibilities: Campaign Planning & Strategy: Develop a comprehensive B2C lead generation strategy tailored to the loan/debt settlement niche. Identify the target audience and create a buyer persona for precise ad targeting. Ad Creation & Management: Design engaging ad creatives (image, video, and copy) that comply with Meta advertising policies, especially for sensitive industries like loans. Set up and manage campaigns acro...
...comprehensive educational website. Key features of the site will include: - Online Courses: The website should have a robust system to host and manage online courses. - User Registration and Profiles: A user-friendly registration process is essential, along with personalized profiles for each user. - Blog and Articles Section: The site needs an integrated blog to share articles and updates. - Freelance Section: A dedicated space for freelancers is required, allowing for interaction and collaboration. The ideal candidate for this project should have a strong background in web development, with specific experience in creating educational platforms. A keen understanding of user interface design and e-commerce (even though this project does not currently require a specific e-commer...
...professional to create a detailed 3D architectural model in Revit from the attached 2D structural and architectural drawings. The 3D model is intended for educational or training purposes, so a high level of detail and accuracy is critical. Key Responsibilities: - Create a comprehensive 3D architectural model in Revit. - Incorporate rebars in the slab, one beam, and one column, all using Revit. - Add necessary detailing, objects, and features such as a parapet, boundary wall, lawn, roads, furniture, etc., in line with modern architectural styles. - Conduct a professional 4D simulation using Navisworks. - Produce rendered images and a walkthrough/flythrough animation with sufficient detail. Ideal candidates should have extensive experience with: - Revit for ...
We are seeking a dedicated Market Research Specialist based in Indonesia to conduct a detailed survey and provide actionable insights for our teak wood products business. This freelance role requires a keen eye for detail, strong organizational skills, and the ability to work independently. Job Description: As a Market Research Specialist, your primary responsibility will be to gather comprehensive data and insights across key areas critical to our business operations in Indonesia. This includes supplier sourcing, price analysis, rental market research, and workforce recruitment strategies. Responsibilities: Supplier Sourcing for End Grain Teak Wood Cutting Boards Identify reliable suppliers specializing in end grain teak wood cutting boards. Verify production processes, includi...
...professional to create a detailed 3D architectural model in Revit from the attached 2D structural and architectural drawings. The 3D model is intended for educational or training purposes, so a high level of detail and accuracy is critical. Key Responsibilities: - Create a comprehensive 3D architectural model in Revit. - Incorporate rebars in the slab, one beam, and one column, all using Revit. - Add necessary detailing, objects, and features such as a parapet, boundary wall, lawn, roads, furniture, etc., in line with modern architectural styles. - Conduct a professional 4D simulation using Navisworks. - Produce rendered images and a walkthrough/flythrough animation with sufficient detail. Ideal candidates should have extensive experience with: - Revit for ...
Hi, I am looking for recruitment leads. "Project Manager" job roles. In England. Any job level £25,000 - £100,000 Looking for company size 10 - 250 staff Want the Hiring Manager First Name, Last Name, Job Title, Email Address Looking for 250 leads, can come from online listings on Indeed, CV Library, Reed, Job Site, Google Jobs
Job Title: AI Assistant Developer – Lead Response Integration () Location: Remote Contract Type: Freelance/Contract Overview: is seeking a skilled AI developer to set up and integrate key features into our AI assistant. The goal is to enable the assistant to efficiently process incoming leads, initiate calls within 5 minutes, and engage with the lead in a personalized manner—calling them by name and collecting relevant information for follow-up. The successful candidate will work closely with our team to refine this process and ensure a seamless, high-quality user experience. Responsibilities: Lead Detection and Processing: Configure the AI assistant to detect incoming leads in real time and trigger an automatic call within 5 minutes of receiving the lead’s i...
...innovative marketing strategies. - Strong track record of generating successful outcomes in previous marketing campaigns. Please share what you can do, keeping in mind the budget constraints, and how you plan to achieve maximum visibility and bookings for my guesthouse. Please note; the cheapest quote will probably get this job, then if the first job produces results, we will continue giving more jobs to you, but first need to prove that what you do works in getting customers. Then when we see it works, will keep coming back to you for more....
We are looking for a talented freelance video editor to create a short, impressive, and dynamic Instagram Reel. The Reel should capture attention within the first few seconds, follow current Instagram trends, and convey a powerful message in 15 seconds or less.
...stops at ~157 jobs out of ~410 listed. Fallback HTML parsing is insufficient, leaving many fields incomplete. Requirements: Comprehensive Data Extraction: Fetch all job listings from Adzuna for the provided URL. Extract key fields, including: Job Title Company Name Description (cleaned and free of HTML tags) Location Posting Date ( Ensure no blank fields Pagination Support: Ensure the scraper navigates through all pages of the search results, capturing every job listing. Fallback Mechanism: If JSON-LD is unavailable or malformed, extract data reliably using HTML selectors for titles, company names, descriptions, etc. Error Handling: Implement robust error handling for issues like missing elements, timeouts, and unexpected HTML structures. Log skipped or problematic jobs...
I'm looking for an architect who can create a one floor, 200m2 house with a traditional architectural style. The layout should include: - Two main bedrooms - One maids bedroom - A spacious sitting area - An open kitchen and dining area - An open concept living and dining area The ideal freelancer should have a strong background in traditional architecture and experience in designing functional, spacious homes. Your portfolio should showcase similar projects, and a keen understanding of open concept spaces is crucial. Please include in your proposal examples of previous work that align with this project.
I need a professional to transform my comprehensive sketches into full construction documents for a single-family residence. Skills and Experience: - Proficiency in CAD or similar design software - Experience in residential architecture - Ability to create detailed, comprehensive construction documents - Strong attention to detail - Good communication skills to ensure understanding of sketches
...section, allowing travelers to: Upload videos, images, and reviews from their holidays. Introduce friends to the platform. Earn bonuses and rewards, with travelers paying a small annual fee for access to these bonus-related packages. Key Requirements: 1. Platform Expertise: Vast knowledge of large-scale platforms for advertisements and traveler engagement. Ability to implement robust architecture to handle high-volume data and traffic. 2. Technical Skills: Strong experience with unmanaged VPS servers, including: Uploading and downloading files. Managing server environments. Advanced knowledge in AI technology and its integration for automated processes. Experience with Google APIs (e.g., Maps) and other integrations. Familiarity with various payment systems, i...
...functionality. Admin Panel Full management of user accounts, subscriptions, and analytics. Detailed reporting features for admin and premium company accounts. Ability to assign sub-admin roles with specific access levels. Core Features Required Advanced filtering and sorting for employers (skills, industry, experience, etc.). Subscription models for companies with tiered access levels. A scalable architecture that ensures high performance, data security, and privacy. Key Expectations Communication Daily status updates. Transparency on timelines, delays, or issues. Proactively recommend improvements that align with industry best practices. Open communication channels at all stages of development. Customization and Security All data must be secured and regularly backed up. Anon...
Descripción del Proyecto: Actualización y Optimización de Website Estamos buscando un profesional freelance para realizar una actualización integral de nuestro sitio web. Los principales objetivos y requerimientos del proyecto son los siguientes: Tareas a Realizar: Optimización General del Sitio Web: Mejorar la velocidad de carga y el rendimiento del sitio. Corregir posibles errores de diseño responsivo y asegurar una correcta visualización en dispositivos móviles, tablets y desktop. Revisar y optimizar la arquitectura del sitio para una mejor experiencia de usuario (UX). Integración de Métodos de Pago: Binance Pay: Implementación de un sistema que permita aceptar pagos mediante Binance, incluyendo la c...
...Responsibilities: - Lead a development team to create efficient and reusable systems for complex applications. - Implement monitoring tools to ensure system availability during peak traffic and propose solutions to maximize uptime. - Identify and resolve performance and scalability issues. Key Requirements: - Proficient in data analysis and reporting functionalities within ROR. - Experience with system architecture and efficiency. - Strong drive, ownership, and team-oriented mindset. - Proficient in standard CS fundamentals (data structures, algorithms, complexity analysis). - Strong English proficiency. - Systematic debugging and problem-solving skills. The application will need to pull data from various sources including databases, external APIs, and CSV/Excel files. Your exp...
I am looking for a freelance recruiter or marketing professional to maximize the usage of my company-provided referral link for hiring purposes. The goal is to share the link with as many qualified candidates as possible and encourage them to apply for open positions through it. The freelancer will be responsible for: 1. Identifying relevant job seekers based on the company's open roles. 2. Strategically sharing my referral link with potential candidates via job boards, LinkedIn, social media, and professional networks. 3. Reaching out to candidates to explain the application process and ensure they use the referral link. 4. Providing regular updates on outreach efforts and link usage metrics. Success in this project will be measured by the number of valid applications submi...
"Develop a detailed architecture and codebase for a mobile app compatible with Android and iOS platforms. The app should have the following features: Core Features: Live Video Streaming: Enable instructors to host live courses with real-time video and audio streaming. Include features like live chat or Q&A for interaction during sessions. Course Marketplace: Create a marketplace for instructors to list and sell courses. Integrate secure payment gateways like PayPal, Stripe, or UPI for transactions. Support multiple currencies. Recorded Classes Access: Allow users to purchase recorded classes and view them anytime after purchase. Ensure secure video streaming to prevent piracy (e.g., DRM or token-based streaming). Functional Requirements: User Authentication: User regis...
We need a planning tool for progress planning and resource planning. The progress tool is quite standard,...MS Project. But we want here that you have to press a button to create a new project. Furthermore, we want search functions and filtering options. It must be low user-friendliness. Otherwise, there must be the possibility of expanding and moving columns/creating new ones. For all resources that are allocated to a project, we want a separate view of this, so that we see a resource list, and whose jobs these are placed on. Furthermore, we need this to be integrated with Outlook Calendar. The best thing is that this is a web application, where you have a login, where a company is unique, but other members can of course be invited. We are open to suggestions and good solutions...
...game should have a challenging AI for solo players. - Leaderboard: A competitive edge is crucial. The game should feature a leaderboard to track player rankings. Design: The game interface should embody a traditional design style, reminiscent of classic Chinese chess boards. Ideal Skills: - Game Development - UI/UX Design with a focus on traditional aesthetics - Knowledge of multiplayer game architecture - AI Programming for gamified experiences - Experience with app deployment on major platforms. Please provide examples of similar projects you've completed....
Hello, I am looking for an experienced freelance developer to transform an existing React template into a complete mobile application in React Native for iOS and Android, while ensuring connection to the existing backend developed in Laravel. Here are the project details: ?️ Context: 1. I have a fully functional e-commerce website developed with a Laravel backend. 2. The Laravel backend is already configured with a database and exposes several RESTful API endpoints. 3. I also have a React template currently used as the website frontend. I now want to: • Create a mobile application (Android & iOS) using React Native. • Connect this application to the existing Laravel backend. ? Mission Objectives: 1. Adapt the existing React template to React Native. 2. Connect the ...
...knowledge of either AWS or Azure, with a good understanding of similar services running on the other platform. Cloud-Native and Hybrid Systems Cloud Concepts: In-depth understanding of cloud computing principles, including compute, storage, and networking. Familiarity with hybrid cloud and multi-cloud deployment strategies. Scalability and High Availability: Networking Fundamentals Network Architecture: Strong understanding of network topologies and design principles (e.g., LAN, WAN, VPN, Subnets). Knowledge of routing, switching, and DNS configurations in platform-agnostic environments. Virtual Private Cloud (VPC): similar terminology in Azure Understanding of virtual networking concepts such as isolated network environments, subnets, route tables, and NAT gateways. Abi...
Je cherche un freelance pour finaliser et préparer mon site web (plateforme de recherche pour associations) pour sa publication. Tâches : - Finaliser le design et la navigation du site pour qu’il soit attractif et fonctionnel. - Compléter le contenu (texte, images) et vérifier que les fonctionnalités de recherche sont opérationnelles. - Tester le site sur différents appareils et corriger les bugs. Exigences : - Expérience en design web et édition de contenu (WordPress ou similaire). - Bonne maîtrise du français écrit. Budget : Le budget est de 50$. Merci de me contacter avec des exemples de vos travaux précédents.
I have an existing working TensorFlow code that requires modifications to enhance training performance and improve model test metric. I do not need a new code from scratch, but rather an expert who can make targeted changes to my existing code and run it on a gpu. I need a fully trained model within 2-3 days. My model has about half a million parameters and any changes to Network architecture must ensure the parameter count stays within one million. My test metric is miou and I want to achieve 80% while my current model gives me roughly 40%. Besides that, the final model should run on a CPU. Gpu is only required to make training faster. Key Requirements: - Access to a GPU and expertise in utilizing it for deep learning tasks - Proven experience with training deep learning networks ...
Before submitting a proposal please read the project description Project Title: Marketplace Platform for Scientific Services Budget: $500 - $750 USD Project Description: We are seeking a skilled freelance developer to build a comprehensive online marketplace platform tailored for the scientific research sectors, similar to and Science Exchange. The platform will connect vendors offering scientific services/products with buyers from academic institutions, biotech companies, and pharmaceutical firms. Project Requirements The project will include the development of the following core components: 1. Admin Panel Comprehensive dashboard to manage users, transactions, approvals, and overall platform settings. 2. Vendor Panel A dedicated space for service providers to list their offerin...
We are seeking a highly skilled and motivated IT Enterprises Architect to join our dynamic team. The ideal candidate will have 2-5 years experience in IT Enterprise architecture or IT strategy consulting, and ready to join immediately.
...User-friendly and intuitive interface (UI/UX). Backend hosted on a scalable and secure cloud service. Deliverables Fully functional mobile application. Functional prototypes and design mockups for approval. Submission and approval of the app on Google Play Store and Apple App Store. Admin dashboard for app management. Documentation, including user manuals, technical specifications, and system architecture. Post-launch support and maintenance (specify duration)....
Job Title: Android Developer Experience: 2+ Years Location: Remote or On-site Job Description: We are seeking a skilled Android Developer to join our team. The ideal candidate will be responsible for maintaining exist...Proven experience of 2+ years in Android development. Strong knowledge of Java or Kotlin. Familiarity with Android SDK, APIs, and third-party libraries. Experience with version control systems like Git. Understanding of UI/UX principles for mobile applications. Ability to work independently and handle multiple tasks. Preferred Skills: Knowledge of modern architectural patterns like MVVM or Clean Architecture. Experience with RESTful APIs and database integration. Why Join Us? Opportunity to work on challenging and diverse projects. Friendly and collaborative work en...
I am looking for an experienced CAD/Revit professional to edit my DWG files. Scope of Work - The main tasks involve: - Modifying existing components, including adjustments to dimensions, layouts, materials, and textures. - Ensuring all sheets match the original layout and formatting, incorporating the provided markups. - Recreating the title block and maintaining all other original sheet information. I have included: - Markup sheets detailing the required amendments (5 sheets). - The original DWG files. - A complete set of plans in PDF format for reference. - Before submitting a proposal, please carefully review all the provided materials. Requirements - To be considered, you must: - Demonstrate proficiency in CAD software and experience with DWG file editing. - Showcase strong...
Annonce de Recrutement : Développeur Mobile Freelance Titre : Développeur Mobile Freelance expérimenté pour la création d'une application de transport --- Description du Projet Nous sommes une entreprise en phase de lancement, basée à Conakry, Guinée, et nous souhaitons développer une application mobile révolutionnaire pour le transport. Inspirée des plateformes comme Uber et Yango, cette application sera adaptée aux réalités africaines, avec un accent particulier sur les besoins des utilisateurs guinéens. Notre objectif est de proposer une solution fiable, abordable et facile à utiliser pour connecter passagers et conducteurs, tout en intégrant de...
Part Time Freelance Developer Needed for MVP Development of a Marketplace Platform Location Preference: Jaipur (Remote candidates with strong portfolios will also be considered). About the Project: We are building an MVP for a marketplace platform designed to connect service providers and users. The platform will feature user-friendly booking functionality, provider management tools, and integrated payment systems. The goal is to create a seamless and scalable web application with a clean interface and efficient backend. We are looking for a skilled freelance developer to develop this MVP from the ground up. You will be collaborating with our team to create a polished, functional product within a specified timeframe. Scope of Work Core Features: 1. User Pla...
Tengo experiencia en auxiliar administrativo. Recepción de llamadas , emails, asesoría , conocimiento en office , Excel , Word entre otro. Conocimiento en programas de inventario . Resolución de problemas y pqr
Native Device App Development Objective: To develop a nati...Offline Mode: Ensure content playback continues uninterrupted if the device is offline. Deliverables: Fully functional native Android app developed in Kotlin. Clean, maintainable code with proper documentation. Support for multimedia playback (photos/videos) with smooth transitions. Local storage integration for offline content access. Background synchronization for periodic updates. Scalable architecture for future content types (e.g., web pages). Expectations from the Developer: Experience in Kotlin and native Android development. Strong understanding of multimedia playback and local storage management. Ability to integrate APIs and handle background tasks efficiently. Commitment to ensuring smooth and seamless user ex...
I am looking for an experienced architect to help refine our current floor plan for a mo...aesthetic preferences. Key Responsibilities: - Modify the current layout to create a more fluid and spacious flow throughout the home. - Add or remove rooms as necessary. - Design and incorporate a central courtyard within the house. - Revamp the living and dining areas, bedrooms, bathrooms, and kitchen/utilities to fit an open-plan design. Ideal Candidate: - Proven experience in residential architecture, particularly with modern, minimalist designs. - Demonstrated ability to modify existing floor plans. - Creative mindset with an ability to design unique features such as a courtyard. - Excellent understanding of open-plan layouts. - Strong communication skills to understand and implement o...
I'm seeking a skilled photographer to create a series of six retouched photographs that depict an urban location of significance to me. The project is not just about capturing a place, but conveying a balanced, neutral mood throughout the series. Key Project Elements: - Location: The photographs will be taken in an urban setting. - Mood: The overall s...six retouched photographs that depict an urban location of significance to me. The project is not just about capturing a place, but conveying a balanced, neutral mood throughout the series. Key Project Elements: - Location: The photographs will be taken in an urban setting. - Mood: The overall sentiment of the series should be neutral and balanced. - Focus: Emphasis will be placed on the architecture and structures of the c...