Program using template stack class linked listроботи

I need a roll up banner designed to represent my business. Looking for a simple design and have accompanied an example of a leaflet for the style along with my logo and brand guide Specification is a template attached

I am seeking an experienced Full Stack Developer with proficiency in Springboot and Angular to create an impactful website with a REST API. The primary aim of the project is to provide a platform that assists employees in managing workplace shift. Key features required are: 1. E-commerce functionalities: The website will be more than a basic informational tool. It will include capabilities such as listing businessmen on call and posting guards for the workplace. Proficiency in creating robust e-commerce platforms is desirable. 2. Inclusive Database: The platform should be capable of maintaining a database for recorded guards. Experience in backend database development is vital for this role. 3. User Authentication System: The website should provide a secure username and passwor...

...seeking an AI/ML specialist with a strong background in full-stack development to work on an exciting project. Key Requirements: - Proficiency in AI/ML methodologies and algorithms. - Hands-on experience in full-stack development. - Ability to seamlessly integrate AI/ML with the front-end and back-end of web applications. Your responsibilities will include: - Developing and implementing AI/ML models for specific tasks. - Ensuring the AI/ML components work effectively with the existing tech stack. - Enhancing the overall efficiency and effectiveness of the application through AI/ML capabilities. Please provide examples of relevant projects you've worked on in the past, especially those where you've combined AI/ML and full-stack technologies. Expe...

I'm seeking a skilled Python programmer with OpenCV experience, preferably one who has dealt with table detection from PDF and images before. The primary skills desired include: - Python programming - Knowledge of OpenCV - Familiarity with table and structure detection Your main task will be to develop a program that can accurately identify table structures within input files. The files will be PDFs or images, or both. You're expected to program a feature that detects these components: - Cell boundaries - Text within the cells - Overall table structure For the sake of this project, merged cells should be discerned as a single entity during the detection process. Your solution should demonstrate precision in merged cell detection. I look forward to bids from thos...

Objective To enhance the existing PowerPoint presentation draft/template by designing each slide to look visually appealing using the provided color palette. The project involves refining the visual elements, particularly the maps, while maintaining their proportions. Key Deliverables Enhanced Slide Design: Improve the overall aesthetics of each slide. Apply the provided color palette consistently across all slides. Ensure text and visual elements are balanced for clarity and impact. Map Refinement: Enhance the visual appeal of all maps without altering their proportions. Use consistent and clear labeling for better readability. Apply thematic elements from the color palette to the maps. Consistency and Professionalism: Ensure a cohesive and professional look throughout t...

Full Stack .NET Core Developer Needed to develop our whats app api platform A basic requirement is that he has previously worked on the WhatsApp API platform. I can review it before starting work

I'm looking for a skilled full stack developer to upadate robust web application based Corstone.js. The project involves integrating essential features using Laravel and Corstone.js. Key Requirements: - User Authentication: Implement secure user authentication system. - Database Management: Develop database handling for moderate complexity transactions and multi-user interactions. - UI/UX Design: Craft a clean and professional interface to enhance user experience. Ideal Candidate: - Proficient in Laravel and Corstone.js. - Experience in implementing user authentication and database management. - Strong UI/UX design skills. - Capable of handling moderate database complexity. Your expertise will be pivotal in delivering a high-quality, user-friendly application.

I'm looking to tap into a potential customer base that I've identified on Instagram. I have amassed 10,000 Instagram url's, which are not linked to my account. I cater to the fitness and wellness industry, providing a range of services that I wish to advertise directly to these individuals. While the method of outreach hasn't been determined yet, it's crucial that this is done on a large scale or 'en-block'. The ideal freelancer for this job should ideally: - Have extensive experience in social media outreach, preferably Instagram - Understand the fitness and wellness services market - Be creative with a knack for engaging potential customers - Have a proven strategy for successful en-block messaging without being labeled as spam - Understand...

Currently, I have a multi-vendor live selling/streaming app that was built using Flutter. While it has moderate features, there is significant room for improvement. Here's what I need: User Interface and Functionality Enhancements: - I need an experienced full stack flutter developer to inject fresh life into my app by redesigning the user interface, enhancing existing features, and integrating with third-party services. Design and Graphics: - Beyond functionality, aesthetics matter. Therefore, elements like the logo, color scheme, and icons need a complete makeover to enhance the overall user experience. Ideal Candidate: - Proven experience with Flutter is essential - Previous experience in app redesign tasks - Expertise in UI/UX design with attention to details ...

I'm keen to revamp my resume as soon as possible, focusing on making important updates in my work experience, skills, and overview sections. Proven excellence in resume writing and design is key for me. Your tasks include: - Revamping my work experience: Updated information will be provided and needs to be incorporated creatively. - Skills refreshment: I have acquired new skills that need...experiences and skills. Ideal candidate should: - Have strong experience in resume writing, making changes in a way that enhances overall presentation. - Understand and utilize current resume trends to offer me an edge in the job market. - Be able to work fast and efficiently as I require this update ASAP. Feel free to make concise, I would also appreciate content for an about me section for ...

I'm on a tight deadline to develop a new application using Laravel. There are some minor bugs that need to be resolved before we can move forward. Ideal Skills & Experience: - Expertise in Laravel and PHP - Proficient in resolving minor bugs - Able to work efficiently under a tight deadline - Strong communication skills, as we'll need to discuss bug resolution progress and application development milestones regularly

Primary tasks: Initially this is all to be done on a new Linux STAGING ONLY server. 1) Linux staging server setup -> deploy our existing project to a new VPS using gitlab 2) Woocommerce -> continue long term development work on our existing custom plugin. Transfer the existing production woocommerce to this staging server. 3) ongoing long term development of our CRM app Other components of our stack which are a HUGE ADDED BENEFIT if you can work on them -> .NET ASP, WEB API + MS SQL DETAILS HERE -> PRIORITY IS TO HAVE A DEVELOPER ON OUR TEAM (LONG TERM) THAT CAN FOR NOW ALSO WORK WEEKENDS AS WE HAVE SEVERAL EMERGENCIES TO FINISH URGENTLY. Someone who can efficiently manage Linux VPS and efficiently use GITLAB is critical. Initially we need part

...business operations, particularly related to my advertising campaigns. The focus of this project is to ensure the complete and accurate functioning of my PPC campaigns. This involves the following key aspects: - **Business Operations Verification:** The ideal candidate will have a deep understanding of Google Ads and be able to perform a comprehensive verification of the business operations linked to my PPC campaigns. This includes ensuring that all tracking and conversion mechanisms are set up correctly and functioning optimally. - **Google Ads Certification:** It is crucial that the chosen freelancer is Google Ads Certified, as this certification signifies a high level of expertise and knowledge in managing Google Ads campaigns. This will instill confidence in their ability...

I am searching for a skilled freelancer who have developed an examination and class timetable for a multi campuses univeristy (1 - 10 campuses).

I'm in need of a skilled Full-Stack Developer with proficient knowledge in JavaScript, particularly in Node.js and react I want a complete bookstore website with basic crud operations with firebase and responsibilities include but are not limited to: - Building high-performing, scalable applications - Writing maintainable, testable, efficient code - Employing Firebase as the database for the project Experience & Skills: - Proven experience with JavaScript and Node.js - Knowledge and experience with Firebase - Understanding of non-relational databases - Ability to work independently and in team settings - Strong problem-solving skills

I am hiring for a Full Stack Web3 developer for my team. Tech Stack: Blockchain: Blast (EVM) Frontend: Typescript + NextJS + Tailwind + Vercel + WAGMI + Ethers V5 + Typechain Backend: Typescript + Vercel Lambda + tRPC + AWS + Prisma ORM + Ethers V5 + Typechain + Upstash Redis Database: MySQL (Planet Scale) + AWS S3 Storage Randomization: Gelato VRF Static File Hosting: AWS S3, Pinata Smart Contracts: Foundry, Hardhat Monorepo. Here you go: Objective: Design and implement a scalable backend and frontend system for tracking and displaying NFT transactions similar to the "Activity" feature on OpenSea The system should handle varying loads seamlessly, from 500 to 50,000 users. Tasks: System Architecture Design: Task: Design the overall architecture for the activit...

...Details of our current project STACK can be seen here -> PRIORITY IS TO HAVE A DEVELOPER ON OUR TEAM (LONG TERM) THAT CAN FOR NOW ALSO WORK WEEKENDS AS WE HAVE SEVERAL EMERGENCIES TO FINISH URGENTLY. We will start with 5-10 small task in and then go to some smaller .NET tasks all with 1 day sprints for you to become familiar with the software and then our main goal will be to integrate another B2B API for our MVNO. Initially we need part of the hours to be worked in the first weeks from 8:00PM- 2:00am UTC -3 (Brazil Time) later you can work on your time zone. If you are awarded the task we expect you to accept IMMEDIATELY and if the project is not accepted immediatly we will award it to another developer. To qualify you must be full stack and work PROFICIENTLY ...

It’s online hotel booking management job! Not a developer job! I am looking for a full-stack staff with experience in managing online hotel system. Key Features: - Reservation Management: manage reservation on different includes a calendar view to visualize and manage bookings. - Claim Handling: be responsive handling of customer issues. -adhoc task upon discussed Ideal Experience: - Prior experience in managing hotel management systems or similar online management platforms is highly desired. - Good communication in English if you can speak mandarin it is an advance point. Please submit your proposal. If you're confident please provide a short introduction about yourself.

As a beginner with keen interest in Full stack Java Script developer, I am looking for a tutor with an impressive full stack development track record and hands on experience. Tutor must teach every facet from front end(HTML, CSS, JAVASCRIPT), back end(JavaScript), Git & Git hub,React.Js, Node.Js with , database(MongoDB/PostgreSql), API’s, web security, DevOps deployment, cloud services(Aws/Azure), Test and debugging and project management. On every check point tutor needs to give real world project experience by Building projects on top of them.

...importance of a well-designed website and the value it brings to a business. • Tech Savvy: Familiarity with basic website design concepts and digital marketing trends is a plus. Technical Requirement: • Fast Internet • American English Accent • Quality Microphone Ready to take your sales career to the next level? We are! How to Apply? (Do the Following to be considered, copy and paste the template below and use as your cover letter) 1. Record Your Voice: Read the following sales script with your voice: 2. Speed Test Goto: Change server to any Los Angeles, CA Server. Screenshot or link me to your test result. 3

I'm in urgent need of an urban planner to assist me with a project related to the program 'Building Cities'. I need now help in the first part which is CITY FOUNDING i dont seem to relate between the CITY PLANINGm the CITY FOUNDING which is building the city hall and the Geography regions like the attached WOODLAND It should be simple.... check it out ... its urgent for today

...DR backlinks, blogging, creating pages to rank for easy keywords, running keyword reports, etc. I will only respond to offers that have confirmed they have watched the video. I will not answer bot responses. Key responsibilities include: - Utilizing SemRush to identify toxic backlinks - Compiling the list of toxic backlinks in a notepad for Google Disavow backlinks tool - Ensuring that the backlinks are safely removed from our website The ideal candidate should have: - Prior experience in using SemRush for backlink analysis - Proficiency in compiling and managing backlink lists for Google Disavow tool - A solid understanding of SEO best practices and the impact of toxic backlinks on website ranking Access to the website's Google Search Console is crucial for this ...

...Word expert to design a comprehensive report template that contains all the requisite sections for a detailed report. The ideal freelancer for this project should have: - A solid understanding of Microsoft Word. - Previous experience in creating professional templates or reports. The key sections that the report template should include are: - Title page - Table of contents - Introduction - Body - Conclusion - References Each section should be clearly defined and easy to navigate. For the title page, it should encompass the following elements: - Project title - Client's name - Date - Project logo - Project description - Title block I require standard formatting and styling for the title page and the entire document. It's crucial that the template look...

As a travel business, we are in need of an experienced full-stack developer to create a feature-rich website using WordPress powered by WooCommerce. With a primary focus on domestic travel, we require several key functionalities: - **Online Booking System**: A user-friendly system allowing customers to search for and book travel services. - **Destination Recommendations**: Suggestions for captivating domestic destinations to entice potential travelers. - **Blog Section**: A platform for sharing engaging and informative content. Specifically, the online booking system should include a robust search functionality. This is vital for our users as it makes browsing and booking trips easier. The ideal candidate for this project will have: - Proficiency in WordPress and Woo...

We are seeking a Flask (Python) developer to set up a dashboard for our project using the following template: Please provide a quote for this job and an estimated timeline for completion. Objectives: We need a small application to facilitate user onboarding for our messaging bot. The dashboard will manage new user onboarding and offer basic administrative features. Dashboard Pages: • /signup • /signin • /forgot-password • /reset-password o Authentication logic with two roles: user and admin o Forget / Reset password logic required • /home o Accessible to logged-in users only o Displays bot updates and useful links o Updates data retrieved from the database • /profile o Accessible to logged-in users only o Contains a user profile data form

I'm looking for a cross-platform ...well-designed. - Security is also a key consideration, as the reports will likely contain sensitive information and should be well-protected. - Please provide examples of similar cross-platform apps that you have developed. - Experience with reporting functionalities and/or data security is a plus. Features of the Application will be, Name and class of app is daily Class reporting Software 2. Select the class you taught today from class 3 to class 12 3. Select the topic 4. Upload videos, and queries. 5. Mark it as done partly done or not done 6. Integrate it with calendar 7. Mark holidays 8. Integrate GPS location in it Please respond with details on your experience, how you would approach this project and ...

I'm looking for someone to customize some BeTheme template pages for me. Specifically, I need pages that showcase my products using the BeTheme style as seen here: BeTheme Detailing. The template pages should include designs that effectively present images and text related to my products, adhering to the style shown in the provided link. Please send me some sample images or mockups related to this style to start the conversation directly. Any spam messages, greetings, links or unrelated content will be ignored.

I need a professional to provide 2600 Flash in a widely accepted cryptocurrency like BTC, ETH, or USDT for a Private Placement Program. This coin is only required to sit in a wallet for 30 - 60 days. It will not be cashed, traded, or exchanged. Key Responsibilities: - Providing 2600 Flash in a widely accepted cryptocurrency - Transferring the coins into a secure wallet and ensuring they remain untouched for 30 - 60 days Ideal Skills and Experience: - Familiarity with cryptocurrency trading - Experience in Private Placement Programs and related procedures - Trustworthiness and reliability - Strong understanding of digital wallets and their security protocols This is a straightforward task that requires someone who can deliver on time and maintain the security and integrity of the...

...high-frequency communication between the mobile device and the vehicle's equipment. 【2　Technology Description】 This technology relates to devices equipped with the ability to measure distance to other equipment using wireless communication, and a feature to notify users when communication is obstructed. With this technology, users can quickly understand the situation when communication disruptions occur with vehicle equipment. Please search for this technology. 【3　Reference information】 This technology pertains to devices that perform authentication processes with other equipment using wireless communication. Specifically, these devices use Ultra-Wideband (UWB) wireless communication and include a control unit that conducts vehicle control based on measured distances...

I need assistance creating a specialized HTML email template that is compatible with Gmail, Outlook, and Yahoo Mail. We are transferring our daily e-newsletter mailouts from MailChimp to Simply Stakeholders, which is powered by the TinyMCE WYSIWYG editor. We have existing designs that we need converted into html coded templates that will be functional and editable on the front end, including being able to swap out images. The templates need to be responsive on mobile and desktop devices. The main purpose of the email will be sharing news of the day/week to our client base. We have an in-house designer who can serve as project liaison. Deadline to have the new templates operational is May 29. Access to the back-end of Simply Stakeholders can be provided for testing. Designed template...

I have a website template that needs customization in terms of layout. The main purpose of the site is to showcase my portfolio, the template is ready it needs the to be filled with the correct data. Key Tasks: - Customize layout: I need a professional to make the necessary changes to the layout of my website template, ensuring that it is visually appealing and functional. - Ensure responsiveness: The website should be mobile-responsive, so the freelancer should ensure that the layout changes are consistent across all devices. This project is ideal for a freelance web designer/developer who has a good eye for design and is committed to delivering high-quality work. A portfolio demonstrating similar projects would be highly appreciated.

...jar”) - the generated jar can be added as a dependency on a Dummy Java app, and it should work exactly like Lombok. For instance, when I annotate a POJO with @, getter methods are added to the .class - Additionally, we will add both Lombok and Gilly dependencies on our , and both dependencies should work. For instance, when a POJO is annotated with @ and @, both getters and setters must be present on the resulting .class The successful applicant will have experience with: - the Lombok library - know the basics of Java reflection and Class loaders - familiarity with Ant scripts We're looking forward to having the project completed within a month. So, if you can work within these timelines and you're looking for a project that's both challenging

I'm in need of a well-crafted email template for my Mailchimp account. The primary purpose of this template is to distribute a monthly newsletter to my subscribers. Key Requirements: - The template needs to look professional and engaging. - It should be compatible with Mailchimp's interface. - It must be optimized for readability on both desktop and mobile devices. - A strong understanding of user experience and design principles is essential. Your role will be to design and create a template that reflects the tone and content of the newsletter. Please include previous email template designs in your proposal.

I'm in need of an experienced Siemens PLC programmer to work on a project involving a S7-1500 model. The goal is to program various tasks related to servo systems. We have two servos linked with each other and have to move relative to one another. We have a 3d model of the assembly and should be simulated before delploying Key Requirements: - Expertise in Siemens PLC programming, specifically with the S7-1500 model. - Proficiency in programming servo tasks such as motion control, positioning, and synchronization. - Ability to work with existing hardware and servo motors setup. You should be able to understand and execute tasks related to motion control, positioning, and synchronization. Your experience with servo programming will be important, as the project is very ...

...website (main landing page and a contact form), using wordpress styled up with our colour and logo themes as per a mock up that was made in PowerPoint - The contents of the landing page needs to be as per the attached example (I will send through as PowerPoint and as poorly converted HTML with images) ... but we want a wordpress theme around it so it looks like a proper website and is responsive compared just loading a single image on a page. i.e. needs to have - Company Logo at the top - Colours/Styles blue as per the example template - Copyright bar at the bottom - head office contact info at the bottom - menu with two items at the top (home and contact form) - basic contact form with capatcha, and the company contact details as well - made using wordpress with...

I am in need of a service program that can effectively manage multiple accounts across various music streaming platforms. Here's a detailed overview of the project requirements: - Focused Platforms: The program should primarily target Spotify, Apple Music, Amazon Music, and Tidal you tube - Key Tasks: The program should be able to increase followers and streams, manage playlists, and track analytics on the said platforms. - Multiple Account Management: It's critical for the program to efficiently switch between different accounts on these platforms. - Automation: I'm looking for automation in scheduling posts and activities to ensure consistent engagement and growth. - Analytics Integration: The service program should have robust analytics...

...make a quite smilar a product page. like this Specifically, I'd like this new page to be built using 'Pagefly' or similar tools. this is the product page that we desire to similar While the page should be an imitation of the reference site, I'd like some minor modifications to the design and layout. Key requirements: - Replicating Product Descriptions and Details: This is the core aspect of the project. You'll need to ensure the descriptions and details are accurately transferred to the new page. - 'Pagefly' Experience: Proficiency in using 'Pagefly' or similar tools is a must. This will ensure that the modifications to the design and layout can be achieved without compromising the overall

Looking for a Full Stack Developer >6 years of experience in agile development of scalable SaaS apps in the cybersecurity area: Improve our app (URL Risk assessment) Improve our app (Domain Typosquatting) Improve our project (Darknet Monitoring) Create an app "hackerview" for passive attack surfave enumeration Create an app for detecting spoofed social media profiles Create an app to scrape ransomware threat actor website and maitain stats about those sites Improve an existing app to monitor paste sites Mininmal Tech Experience: MERN, REST API (JWT), Django, Python, Github, CI/CD, Celery, Redis, Linux, Postgress, Kubernetes, Docker, Nginx, JS, HTML5, Protocols (DNS, SMTP, SSL, HTTP..).Detailed app specifications will be shared at a later stage. |------

I'm in search of a full-stack developer to join me in building a scalable, multi-tenant web application. The project requires expertise in Golang and React for back-end and front-end development, respectively. Ideal Candidate: - Proficient in Golang, JavaScript (React) - Skilled in Cassandra, OKTA - Experience with Docker, Kubernetes - Familiarity with Google Cloud Platform -Apply with Github and sample projects The project entails creating a robust, multi-tenant web application that can handle multiple users with varying requirements. It is imperative that the selected developer is competent in ensuring the application's scalability and reliability. If you have previous experience building similar applications, please don't hesitate to apply. 1. Specific Requireme...

I need a legal expert to review specific documents relating to a property. This includes: - Title deeds: I need the ownership history and any recorded rights of way evaluated, to ensure there are no surprises down ...deeds: I need the ownership history and any recorded rights of way evaluated, to ensure there are no surprises down the line. - Planning permission documents: These need checking to ensure they're in order and up to date. Ideally, the freelancer should have background in auction property legal pack review. I'm particularly concerned about potential issues, specifically around outstanding loans linked to the property. Any insight on potential risks regarding outstanding loans would be greatly appreciated. Skills & Experience: - Property Law - Risk Asses...

I'm in need of a WordPress developer who can adjust a template kit in Elementor Pro to create a business website. We'll need to change the colors and content around as per request of the client. There will be about 9 unique pages. Some templates will repeat to form around 15 total pages. Functionality is very basic. Only thing that needs to be added is a live chat plugin. I will share more specific details via chat.

I'm looking for a talented Full Stack Developer to connect a frontend to a ChatGPT-enabled backend for an education-focused application. Your primary responsibilities will include: - Frontend Development: - I'd like the frontend to be developed using JavaScript, Python, and HTML/CSS. The design should be a blend of modern and minimalistic along with colorful and vibrant elements. - The UX/UI should be intuitive, professional, and engaging for users. - Backend Development: - The backend should feature ChatGPT for comprehensive handling of educational documentation and reports. - Key backend functionalities should include: - User authentication and authorization: Implement a robust system that ensures secure and personalized access for differen...

I need to give the class on Microsoft. Thansk

I'm searching for a skilled JavaScript developer who also has solid experience using Chrome Developer Tools for debugging. The main responsibility of this project will be to analyse and understand functionality of a web application and website. To succeed in this project, you need to: - Be an expert in JavaScript. - Have advanced proficiency in Chrome Developer Tools. - Have a solid understanding and previous experience with web platforms. - API integration experience.

I'm urgently seeking an experienced freelancer to help me update my Joomla template and modules. Your responsibilities will include: 1. **Color Scheme Revamp:** The updated design should reflect the specific designs I've prepared. Expertise in creating an exact match is crucial. 2. **Adding New Functions:** Some new functions to improve my website's interactivity and user-experience need to be introduced. Having prior experience delivering such features will be advantageous. 3. **Styling Update:** I also require modifications and tweaks to the existing Joomla components and modules. Your skills should include Joomla templating and module modifications. The timely completion of this project is essential as I'm looking to implement these changes urgently. We h...

Будь ласка, зареєструйтесь або увійдіть в систему для перегляду деталей.

...front-end and back-end tasks for my project. Specific Skills Needed: - Proficient in ReactJS for front-end development - Experienced in Node.js for back-end development Project Details: - The project involves full-stack development, from building front-end components to implementing server-side logic. - The main aim of the project is not specified, but what I will provide you with are tasks in both front-end and back-end areas. Ideal Candidate: - Proficient in both ReactJS and Node.js, capable of delivering high-quality front-end and back-end solutions. - Experience in full-stack development, with a strong understanding of how to integrate front-end and back-end components seamlessly. - Good communication skills as well as ability to understand and implement requirement...

We are a team of lancers who work as a company and are looking to add team members in our existing dev team on per project basis to rebrand codecanyon projects. Indian, Pak, Bangla, Nepal, Nigeria devs are welcome. This project is not for teams and agents. Only for individual devs with average to good skills. Pay is according to working for a dev team, and not according to end client budgets, we know it, so bid only if you are okay working on below terms as it is same for all of us, all team members. Use our projects to monetise your extra 4 hours a day, which were otherwise not making you anything. Work includes : 1. rebranding projects 2. upgrading dependecies to latest (which will again be useful in future projects done on same script) 3. smoothen flow and bug fixes to ensure all ...

A website for a web design agency is to be completed as a project. It is a coffin page that consists exclusively of a mega section, a multi-page form with multiple choice etc., a contact page, a portfolio page. Homepage Contact page portfolio Multi-page inquiry form for potential customers. Under no circumstances may a ready-made website template be used. It is an advantage if you can start work as soon as possible and your previous customers were satisfied with you.

I'm working on a project using Ignition 8.1.31 and need a feature implemented. The goal is to have a dropdown list in the perspective view that allows the user to select files from a specified directory. Key Points: - The dropdown should be populated with the file names upon the user clicking a perspective View button. - The Load button should be located on the perspective view. The ideal freelancer for this job should have experience with Ignition 8.1.31 and familiarity with creating dropdown lists that are dynamically populated based on user interactions.