Filtrér

Mine seneste søgninger
Filtrer ved:
Budget
til
til
til
Slags
Færdigheder
Sprog
    Job-status
    126,399 payment processing jobs fundet, i prisklassen EUR

    Midtrans payment integration.

    €103 (Avg Bid)
    €103 Gns Bud
    55 bud

    Weka . NLTK. Inbox for details

    €25 (Avg Bid)
    €25 Gns Bud
    3 bud
    Fix commweb payment Udløbet left

    Server FTP Details ftp@ Sheeptime75#

    €28 (Avg Bid)
    €28 Gns Bud
    1 bud

    ...computer networks. PDA based flexible ticket system You are going to implement a prototype of a flexible ticket system. In its complete version it is going to replace the current RF-id tag based system. The new system expected lifetime is 5 year only. In 5 years it is expected that face recognition has advanced sufficiently to allow ticketing based entirely on automatic unattended image processing. While the proposed system only partly reduces the manual control, it will reduce the amount of sign in /sign out equipment on platforms and placing that equipment entirely in the rolling stock. Each train compartment or bus is already equipped with a wireless LAN connected to the InterNet. The train or bus computer knows the current position (GPS). A passenger simply assoc...

    €27 - €226
    €27 - €226
    0 bud

    ...computer networks. PDA based flexible ticket system You are going to implement a prototype of a flexible ticket system. In its complete version it is going to replace the current RF-id tag based system. The new system expected lifetime is 5 year only. In 5 years it is expected that face recognition has advanced sufficiently to allow ticketing based entirely on automatic unattended image processing. While the proposed system only partly reduces the manual control, it will reduce the amount of sign in /sign out equipment on platforms and placing that equipment entirely in the rolling stock. Each train compartment or bus is already equipped with a wireless LAN connected to the InterNet. The train or bus computer knows the current position (GPS). A passenger simply assoc...

    €27 - €226
    €27 - €226
    0 bud

    Opencart credit card payment module error

    €42 (Avg Bid)
    €42 Gns Bud
    7 bud

    hi i need opencar moneris payment extenion

    PHP
    €46 (Avg Bid)
    €46 Gns Bud
    1 bud
    odesk payment Udløbet left

    odesk payment odesk payment odesk paymentodesk paymentodesk paymentodesk paymentodesk paymentodesk paymentodesk paymentodesk paymentodesk paymentodesk payment

    €28 / hr (Avg Bid)
    €28 / hr Gns Bud
    1 bud
    Transfer payment Udløbet left

    Transfer payment .................................................................................. Transfer payment ..................................................................................

    €19 / hr (Avg Bid)
    €19 / hr Gns Bud
    1 bud
    Need Assistance 6 dage left

    I am looking for a freelancer to assist me with data processing and data entry tasks in Google sheets. The project is expected to be completed in less than a week. No specific skills or knowledge are required, basic skills are enough.

    €78 (Avg Bid)
    €78 Gns Bud
    8 bud
    Photography 6 dage left

    ...Studio - I am looking for a skilled photographer to provide product photography services. - The preferred shooting location is a studio. - We need to have 1-5 products photographed. Ideal Skills and Experience: - Proficient in product photography techniques and lighting setups. - Experience in capturing high-quality images of products for marketing and e-commerce purposes. - Knowledge of post-processing and retouching techniques to enhance product images. - Ability to communicate and collaborate effectively with clients to understand their requirements and deliver satisfying results. - Attention to detail and ability to capture the unique features and qualities of each product. - Familiarity with various camera equipment and accessories used in product photography. - Portfoli...

    €2 / hr (Avg Bid)
    Lokal
    €2 / hr Gns Bud
    1 bud

    I am looking for a freelancer to create an Android app for complete gym management. Features: - Membership management - Data logging - User friendly Designs: - I do not have any existing designs or wireframes for the app, so I need the freelancer to design it. Timeline: - The preferred timeline for th...logging - User friendly Designs: - I do not have any existing designs or wireframes for the app, so I need the freelancer to design it. Timeline: - The preferred timeline for this project is less than 1 month. Ideal Skills and Experience: - Experience in developing Android apps - Knowledge of gym management systems - Ability to design user-friendly interfaces - Familiarity with payment processing integration - Strong attention to detail and ability to mee...

    €307 (Avg Bid)
    €307 Gns Bud
    10 bud

    ...preprocessing, and machine learning algorithms to train the model - Implement techniques such as text mining, natural language processing, and pattern recognition to improve the model's accuracy - Ensure the model is scalable and can handle a large volume of incoming emails - Provide documentation and instructions on how to deploy and maintain the model Skills and Experience: - Strong background in machine learning, data science, or a related field - Proficiency in programming languages such as Python or R - Experience with machine learning libraries and frameworks such as scikit-learn, TensorFlow, or PyTorch - Knowledge of text mining techniques and natural language processing - Familiarity with feature engineering and data preprocessing techniques - Ability to opti...

    €27 (Avg Bid)
    €27 Gns Bud
    17 bud

    ...commercial property owners. The main goal of this project is to create a seamless payment process for EV charging sessions. I need the actual prototype. Key Requirements: - Create an outlet that is IoT-connected and equipped with an energy meter - Develop an app that allows users to track individual EV charging session data - Implement a payment system that automatically manages the payment between property owners and users - Ensure accurate tracking of charging session data Ideal Skills and Experience: - Experience in IoT development and integration - Proficiency in app development for both iOS and Android platforms - Knowledge of energy management and metering systems - Familiarity with payment gateway integration - Understanding of EV charg...

    €8416 (Avg Bid)
    €8416 Gns Bud
    26 bud

    ...freelancer who can integrate Planyo with the MercadoPago payment gateway according to the detailed specification provided. Skills and experience required: - Proficiency in integrating third-party payment gateways, specifically MercadoPago - Experience with Planyo and understanding of its features and functionalities - Strong knowledge of API integration and ability to follow the provided specification accurately Key requirements: - Integrate PlanYo with MercadoPago to enable seamless payment processing for our users - Ensure that all features and functionalities of PlanYo are fully integrated with MercadoPago - Implement secure payment processing to protect user data and ensure smooth transactions If you have experience with integrating ...

    €135 (Avg Bid)
    €135 Gns Bud
    16 bud
    image quality 6 dage left

    ...ideal candidate should have expertise in image editing and manipulation, with a strong understanding of high-resolution image processing techniques. Desired Image Quality: - The desired image quality should be high resolution to ensure optimal print quality. - the printed label will be 80mm x 55mm Purpose of the Images: - The images will be used for print purposes, such as brochures, magazines, and posters. Desired Image Format: - The images should be saved in JPEG format, as it is the preferred format for print images. Skills and Experience: - Proficiency in image editing software, such as Adobe Photoshop or Lightroom. - Familiarity with high-resolution image processing techniques. - Knowledge of color correction and image enhancement. - Attention to detail and abilit...

    €12 (Avg Bid)
    €12 Gns Bud
    13 bud
    Ai development 6 dage left
    VERIFICERET

    Project Title: AI Development - Chatbot I am looking for an experienced AI developer to create a chatbot using specific datasets that I already have. Ideal Skills and Experience: - Strong background in AI development, specifically in chatbot creation - Proficiency in natural language processing and machine learning algorithms - Familiarity with the specific datasets provided for training the AI model The chatbot should have the following functionalities and features based on my clear vision: - Ability to understand and respond to user queries in a conversational manner - Integration with various messaging platforms for seamless communication - Personalization capabilities to tailor responses based on user preferences - Integration with external APIs for retrieving relevant infor...

    €442 (Avg Bid)
    €442 Gns Bud
    70 bud

    Hi Rohan Vyas, I've created this project.

    €12 / hr (Avg Bid)
    €12 / hr Gns Bud
    1 bud

    Software to Automate Invoice Entry with AI Learning I am looking for a skilled software developer to create a solution that automates invoice entry using AI learning. This project is for personal use, and I need the software to have invoice processing as its main feature. Key Requirements: - The software should be able to process and extract relevant information from invoices automatically. - It should have AI learning capabilities to improve accuracy and efficiency over time. - The ability to analyze and generate reports based on the processed invoice data is essential. Subject: Proposal for Implementing Automatic Invoice Entry System with AI Learning An advanced automatic invoice entry system. Project Overview: Our goal is to revolutionize our invoicing workflow by introduci...

    €23 / hr (Avg Bid)
    €23 / hr Gns Bud
    53 bud

    Project Description: Python program to download from netu tv I am looking for a Python developer to create a custom program with advanced funct...within the specified timeframe. The program should be compatible with MacOS Or Windows, as that is the operating system I am using. It should be able to run smoothly and efficiently on this platform. Ideal skills and experience for this job include: - Strong proficiency in Python programming language - Experience in web scraping and working with APIs - Familiarity with video downloading and processing libraries - Understanding of MacOS operating system and compatibility requirements If you have the necessary skills and experience, and can deliver a high-quality Python program with custom functionality within a week, please submit your...

    €68 (Avg Bid)
    Garanteret
    €68
    4 indlæg

    I am in need of a WordPress developer to build a WooCommerce website without a payment gateway. The main functionality required is the ability for users to add products to a quote. The website must sync by way of API with our existing Shopify website all products and categories, sub categories and very good search fuction must future on the new website full optimized front and back end full functional Preferred Platform: WordPress Design: I have a specific design in mind for the website. Additional Features: In addition to the 'Add to quote' functionality, I require other additional features to be included on the website.

    €407 (Avg Bid)
    €407 Gns Bud
    167 bud

    Total Project cost will be $350. I will process form for Pii access with below agreement: In order to work on this, Please see the following conditions. 1. You may provide me with information you have submitted already. 2. You may give your purpose of the developer profile approval in detail. I got the purpose, however, detail is supportive. 3. You may pay me 50% of the total amount right after submission of the form. 4. You may inform me about responses immediately you receive from Amazon. 5. You may release the remaining amount after approval of profile. 6. You may provide the information I need for composing the Answers i.e your hosting environment, users etc whenever I feel it necessary. 7. You may be patience during the approval process, as it takes 1-8 weeks. Depends on the A...

    €162 (Avg Bid)
    €162 Gns Bud
    1 bud

    I am looking for a skilled freelancer who can develop an image processing and deep learning algorithm for a specific task. The task involves template matching for medical claims documents. Skills and Experience: - Strong knowledge and experience in image processing and deep learning algorithms - Expertise in object recognition, image segmentation, and image classification - Ability to generate synthetic data for training the algorithm - Familiarity with medical claims documents and their template structures - Proficiency in achieving moderate accuracy levels (70-90%) for the algorithm. project details: Similar Document Template Matching Algorithm for medical insurance claim A challenge when dealing with a large volume of medical invoices, prescriptions, and lab test repo...

    €90 (Avg Bid)
    €90 Gns Bud
    5 bud

    I am looking for a skilled developer who can fix the issues I am experiencing with the Wordpress plugin for Stripe API Gateway. The specific issue I am facing is payment processing errors. Skills and Experience: - Strong experience with Wordpress plugin development - In-depth knowledge of the Stripe API and payment processing - Familiarity with debugging and troubleshooting Wordpress plugins - Ability to work with other plugins and integrate them seamlessly with the Stripe API Gateway - Experience with customizing and optimizing the checkout page to resolve display issues Requirements: - Access to the plugin's code and configuration settings is preferable, but not mandatory - I can provide access to the website backend and/or FTP details for debugging pu...

    €148 (Avg Bid)
    €148 Gns Bud
    43 bud

    Hi Mohammed K., I noticed your profile and would like to offer you my project. We can discuss any details over chat.

    €177 (Avg Bid)
    €177 Gns Bud
    1 bud

    ...profound expertise in natural language processing (NLP) and a track record of successfully conceiving and implementing intricate, user-centric chatbot solutions from the ground up. Key Requirements: Language Proficiency: Mastery in Python is a non-negotiable prerequisite for this pivotal role. The selected candidate must exhibit not just proficiency but an innate command over Python's capabilities. Chatbot Development Expertise: The ideal candidate should possess a proven and distinguished background in the development of sophisticated chatbots. This includes a keen focus on user experience, ensuring that the chatbot's interactions are not only technically robust but also seamlessly intuitive and engaging. Technical Proficiency: Natural Language Processing (...

    €31 / hr (Avg Bid)
    €31 / hr Gns Bud
    25 bud

    Project Title: AI Image Processing for User Face Image with Clothing Overlay I am looking for a freelancer who can utilize AI technology and image processing to create a single image that combines a user's face image with clothing overlay. The specific requirements for this project are as follows: AI Technology: - The freelancer should have expertise in image processing techniques to achieve the desired result. API Preferences: - There are no specific API preferences, and the freelancer can use their discretion in selecting the most suitable API for the task. Final Output: - The final output should be a single image that contains the user's face image with clothing overlay. - The clothing overlay should include a t-shirt from a second image and pants from...

    €230 (Avg Bid)
    €230 Gns Bud
    11 bud

    ...will have expertise in fine-tuning and Retrieval-Augmented Generation (RAG) techniques to optimize the chatbot's performance. Key Responsibilities: Fine-Tuning a Pre-Trained LLM: Apply advanced fine-tuning methods to adapt a pre-existing LLM to our specific domain. Implementing RAG: Integrate Retrieval-Augmented Generation for enhanced contextual understanding and response generation. Data Processing: You will be provided with a substantial dataset in the form of books relevant to our domain. Your task will include comprehensive data cleaning and preparation to ensure the data is suitable for training the LLM. Chatbot Development: Develop a responsive and accurate chatbot using the tailored LLM, ensuring it meets our specific requirements for domain-related queries and int...

    €125 (Avg Bid)
    €125 Gns Bud
    32 bud

    ...limits and in backend we can process the orders and decrease the money Skills and Experience: - Proficiency in web development - Experience in integrating order fulfillment systems and shipping and tracking systems - Familiarity with inventory management and customer relationship management systems - Strong attention to detail and ability to create a user-friendly interface for seamless order processing If you have the skills and experience mentioned above, please submit your proposal with examples of similar projects you have worked on....

    €491 (Avg Bid)
    €491 Gns Bud
    82 bud

    ...developing e-commerce websites, preferably with a focus on fashion and clothing - Proficiency in integrating payment gateways into websites - Knowledge of user-friendly and visually appealing website design - Ability to optimize the website for search engine visibility and performance - Familiarity with responsive design to ensure compatibility across different devices Key Requirements: 1. E-commerce Functionality: - The website should have a secure and user-friendly checkout process, allowing customers to add items to their cart, select sizes and colors, and make payments seamlessly. - Integration with a reliable payment gateway is essential to ensure smooth transaction processing. 2. Product Showcase: - The website should have an attractive and well-organized pr...

    €242 (Avg Bid)
    €242 Gns Bud
    44 bud

    I am looking for a skilled C++ developer who can implement a program with advanced functionality. The program can be related to data sorting, image processing, or algorithm implementation, depending on the freelancer's expertise and interests. Requirements: - Strong proficiency in C++ programming - Experience with advanced C++ concepts and techniques - Ability to handle complex programming tasks and problem-solving - Knowledge of relevant libraries and frameworks in C++ for the chosen functionality Note: The freelancer is free to choose the specific libraries or frameworks they prefer for the program. However, they should ensure that the chosen libraries or frameworks align with the advanced nature of the project.

    €80 (Avg Bid)
    €80 Gns Bud
    15 bud

    We are seeking a highly skilled and experienced Full Stack Developer Agency to join our dynamic team. The ideal ca...Stack Developer Agency to join our dynamic team. The ideal candidate will have a strong background in developing web applications using Laravel and PHP, and a proven track record of integrating Twilio and Stripe APIs. Key Responsibilities: Develop and maintain web applications using Laravel and PHP. Implement and manage Twilio services for communication features. Integrate Stripe API for payment processing capabilities. Collaborate with cross-functional teams to define, design, and ship new features. Ensure the performance, quality, and responsiveness of applications. Identify and correct bottlenecks and fix bugs. Help maintain code quality, organization, and...

    €172 (Avg Bid)
    €172 Gns Bud
    107 bud
    Google cloud developers 6 dage left
    VERIFICERET

    Google Cloud Developers - I am looking for experienced Google Cloud Developers who can provide assistance with specific Google Cloud services such as Compute Engine, App Engine, and BigQuery. - Whether you have an existing project on Google Cloud or are startin...this project should have a strong understanding of Google Cloud services, including experience with Compute Engine, App Engine, and BigQuery. - Proficiency in programming languages such as Python, Java, or Node.js is required. - The ability to design, develop, and deploy scalable applications on Google Cloud platform is essential. - Experience with cloud infrastructure, data storage, and data processing is highly desirable. - Effective communication skills and the ability to work independently or as part of a team are also ...

    €522 (Avg Bid)
    €522 Gns Bud
    24 bud

    I am looking for a software and mobile app developer who can create a hotel management system that includes reservation and payment management features. The app should be compatible with both Android and iOS platforms. Key features: - Reservation management: The app should allow users to easily make and manage hotel reservations, including checking availability, selecting room types, and modifying or canceling reservations. - Payment management: The app should have a secure payment system that allows users to make payments for their reservations, view payment history, and receive payment confirmations. Design and layout: - The client has a specific design or layout in mind for the software and mobile app. The developer should be able to work with the c...

    €419 (Avg Bid)
    €419 Gns Bud
    15 bud

    Hello how are you? We need a dev to code a web application in single page format. This application aims to receive payments (Integration with one API only). The user provides personal data, address and chooses the payment method. Max Budget: $100 USD p.s: ALL AUTOMATIC BID ARE RECUSED, TO ACCEPT YOUR OFFER SEND ON HEADER ("IM NOT A BOT"). p.s[2]: Figma of Design it's available. Awaiting offers, Thanks.

    €144 (Avg Bid)
    €144 Gns Bud
    34 bud

    ...speaker, you will be responsible for providing exceptional customer support to our clients. Need someone that has family and needs to pay bills. Responsible and over 35+. Responsibilities: - Handle incoming customer inquiries and provide accurate and timely assistance - Resolve customer complaints and ensure customer satisfaction - Assist customers with product information, pricing, and order processing - Maintain customer records and update information as needed Ideal Skills and Experience: - Fluent in both English and Spanish, with excellent verbal and written communication skills - Previous experience in customer support or a call center environment is preferred - Strong problem-solving abilities and the ability to remain calm under pressure - Knowledge of basic computer app...

    €4 / hr (Avg Bid)
    €4 / hr Gns Bud
    16 bud

    ...transcription tool. - Experience working with Microsoft Teams platform and APIs to integrate the tool seamlessly. - Strong understanding of natural language processing to ensure accurate transcription of different accents and languages. - Ability to handle large volumes of data and process it efficiently for transcription purposes. - Attention to detail and ability to identify and handle different speakers during the meetings. - Experience with speech recognition technologies and tools to enhance the accuracy of the transcriptions. This project is ideal for an AI developer with a strong background in machine learning and natural language processing, as well as experience with Microsoft Teams platform. The successful candidate will be able to create an AI tool that can tra...

    €181 (Avg Bid)
    €181 Gns Bud
    20 bud
    Python project 9 dage left

    Hi, Statistics is my favorite subject and will be glad to help. I have skills in Data Processing, Statistics, R Programming Language, SPSS, Tableau and Excel. Hire me for your methodology and data analysis chapters for your dissertation.

    €105 (Avg Bid)
    €105 Gns Bud
    1 bud

    I am looking for a skilled developer who can create a basic Python application to extract study values from TradeStation charts using the TradeStation Developer A...a basic Python application to extract study values from TradeStation charts using the TradeStation Developer API. The project requires the following: - Extracting Indicators from the TradeStation charts - Real-time updates of the extracted data - Some basic processing of the data will be required Ideal skills and experience for the job include: - Proficiency in Python programming - Experience with TradeStation Developer API - Knowledge of charting and data visualisation - Strong understanding of real-time data updates and processing If you have the necessary skills and experience, please submit your proposal f...

    €148 (Avg Bid)
    €148 Gns Bud
    25 bud

    ...for a Wordpress plugin developer who can help me with the following requirements: Functionality: - Social media payment, commissions system functionality: I need the plugin to seamlessly make a multivendor payment system, monetization partnership system, and commission system plugin. (Example Youtube or TikTok system setup) Compatibility: - The plugin should be compatible with any Wordpress theme, as I do not have a specific theme in mind. Deadline: - No specific deadline: There is no rush for the plugin development, so the developer can work at their own pace. Ideal Skills and Experience: - Strong experience in Wordpress plugin development - Proficiency in social media payment system integration into into Wordpress - Familiarity with various Wordpress themes an...

    €120 (Avg Bid)
    €120 Gns Bud
    113 bud

    I am looking for a freelancer who can integrate the PhonePe payment gateway into my e-commerce website on Wix. I already have a PhonePe business account, so the freelancer will not need to assist with that. There is no specific timeframe for the integration to be completed. I want to get it coded. I don't want you to intergate the app. Only apply if you can write the code in WIX Velo Mode. Skills and Experience: - Experience with Wix website development - Familiarity with integrating payment gateways, specifically PhonePe - Strong knowledge of e-commerce websites and online payment systems

    €23 (Avg Bid)
    €23 Gns Bud
    12 bud

    I am looking for a developer to create a mob...am looking for a developer to create a mobile app for our fintech company. The app should be developed for both iOS and Android platforms. I have a rough idea for the design and layout of the app, but I am open to suggestions and improvements. The main feature that must be included in the app is payment processing. Ideal skills and experience for this job would include: - Experience in developing mobile apps for both iOS and Android platforms - Knowledge of fintech and payment processing systems - Strong design and UI/UX skills to enhance the user experience - Ability to integrate data analytics for tracking and analyzing user behavior If you have any relevant experience or suggestions, please include th...

    €514 (Avg Bid)
    €514 Gns Bud
    41 bud

    Machine Learning Expert with Extensive NLP and Generative AI Experience for Interactive Website Development Skills and Experience: - Very extensive experience in Natural Language Processing (NLP) and Generative AI - Strong understanding of machine learning algorithms and techniques - Proficiency in Python and relevant libraries (NLTK, TensorFlow, Keras, etc.) - Expertise in Django for website development - Familiarity with interactive website development and user experience design - Ability to integrate machine learning models into web applications - Strong problem-solving and analytical skills Project Requirements: - Develop an interactive website using Django as the platform - Implement generative AI techniques to provide unique and personalized content to users - Integrate NLP ...

    €2071 (Avg Bid)
    €2071 Gns Bud
    115 bud

    ...Experience: - Strong understanding of the WhatsApp API and its functionalities - Experience in creating chatbots for customer service and order processing - Knowledge of AI learning and dynamic conversations is a plus 1. Company Background: Docty is a dynamic healthcare provider focused on delivering innovative and accessible medical solutions. As a tech-forward company, we aim to integrate advanced communication technologies to streamline our services and improve patient engagement. 2. Project Scope Objective: Integrate WhatsApp API with Docty's existing database and RESTful API, enabling customized functionalities for seamless messaging, efficient order processing, responsive customer support, and effective feedback collection. Scope of Work: -Custom integration ...

    €11 / hr (Avg Bid)
    €11 / hr Gns Bud
    16 bud

    ...the website are a donation platform, volunteer sign-up, and adoption listings. More details: Our current website is hosted on 1&1but am open to a platform that may be more functional. Currently, pet owners contact us either a form manager or just a referral by word of mouth thru previous client or veterinary clinic. I am responsible for monitoring the website for communication, gathering and processing information. I communicate with animal owners and emergency vet providers. The process isn’t automated and requires me being “on call” checking for emails almost 24/7. When I receive an email, it’s predominately from an owner requesting info or help. I send a standard email about our charity, the requirements and informing them to send estimates from...

    €695 - €1389
    Forseglet
    €695 - €1389
    86 bud

    ...distribution of personalized content and responses. 3. Inventory Management: Integrate AI to forecast inventory needs based on historical usage data and predictive trends. Enable automatic reordering processes and facilitate vendor comparisons using AI algorithms. 4. Financial Management: Apply AI to enhance financial reporting, budget forecasting, and financial risk assessments. Automate invoice processing, payment reminders, and financial reconciliation tasks. 5. Personnel Management: Develop AI tools for staff scheduling, performance tracking, and identifying training needs. Implement AI-driven recruitment and retention strategies to optimize HR processes. 6. Customer Portal: Create an AI-enhanced customer portal for self-service appointments, information access, an...

    €2375 (Avg Bid)
    €2375 Gns Bud
    78 bud

    I am looking for someone with experience in porting CPU code to GPUs. The project involves converting existing code written in C to be compatible with NVIDIA GPUs. Must understand MPI , OpenACC Acceleration, OpenMP offloading, Parallel Processing, Parallel Computing, GPU porting libraries for GPUs and good at C/C++ programming. Must be expert in computer science, numerical libraries, performance optimization and parallel programing. Several Projects small and big projects will follow for the right person.

    €150 (Avg Bid)
    €150 Gns Bud
    14 bud

    Top payment processing Community-artikler