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...Backend, Platform Development) "Less time managing your projects, more time building your product." aims to be a SaaS platform that redefines agile project management by providing a streamlined, user-friendly, and modular solution. It aims to address challenges faced by users of current tools like Jira, Azure DevOps, Trello, and Asana by delivering: Intuitive Design: Simplified workflows for seamless navigation and usability. Automation and Integration: Smart automation and easy integration with existing tools. Real-Time Collaboration: Advanced features for team communication and collaboration. Insights and Reporting: Powerful analytics and reporting tools to track progress and improve decision-making. Job Description: We are looking for a highly skil...

...AR Builder that is similar to the Blippar one here: Here’s details to model from Blippar: . POWERFUL AND EASY TO USE AUGMENTED REALITY CREATION PLATFORM. Create your our own augmented reality experiences within minutes - available on both desktop and mobile. With no coding required, you can instantly publish your experiences to the web and share your content to any platform and consume on any device: mobile and AR headsets. Blippbuilder makes it easier than ever to create, publish and share your own AR experiences. Free and unlimited access to thousands of AR-ready assets Browse an extensive library of 3D environments, objects, and characters Import models into your project with a single click Publish your AR scenes straight ...

Hello, We have an Amazon store in Spain and want to boost it. We need someone to: - Synchronize international listings with other European countries (around 10 countries) - Create the store for these countries (we can send the images) - We currently have 66 products, so it is a small store. If we are happy with the work we are open to a second phase of Ads campaign creation and management. Many thanks, Sandra

Hello, We have an Amazon store in Spain and want to boost it. We need someone to: - Synchronize international listings with other European countries (around 10 countries) - Create the store for these countries (we can send the images) - We currently have 66 products, so it is a small store. If we are happy with the work we are open to a second phase of Ads campaign creation and management. Many thanks, Sandra

...long-term collaboration to create a series of marketing videos for a software company (Software is our main Product) focused primarily on product demonstrations. The main goal of these videos is to increase sales, so they need to be compelling, persuasive and easy to understand. - Product Demonstration: The first video will be a product demonstration. It should clearly showcase the features and benefits of the product in an engaging way. - Sales Focused: The videos should be designed with the ultimate goal of boosting sales. They need to effectively communicate the value of the product to potential customers. - Long-term Collaboration: I'm looking for someone who is interested in a long-term partnership. If the first video is successful, t...

More details: Date-Jan22,2025 Location - ECR What is the purpose of the caricatures? Event entertainment What type of event will the caricatures be for? Wedding How many guests will need caricatures? 200

I am seeking an AI expert who has experience in bot development using Python. I am going to make an AI bot that creates posts on Reddit and makes comments on them. This bot will include many different personalized Reddit accounts and act like humans. This is the main idea and will provide detailed info to the selected candidate. Waiting for your proposals.

...brief is like a roadmap that will guide the writer to produce content that serves the intended purpose, connecting with the target audience and meeting the desired objectives. This framework provides a universal structure to create a comprehensive and practical brief for any writing project. --- #### **1. Project Overview** The overview of the project sets the scene with scope and purpose for the writing project. It answers some fundamental questions: - **Purpose**: Why is this content being created? Examples: Marketing, education, awareness, entertainment, or storytelling. - **Objective**: What is the expected outcome? Examples: Increase website traffic, inspire action, or educate readers. **Example** "Write a 1500-word article to inform small ...

I'm looking for an expert to enhance the On-page SEO of my Shopify website. The main focus will be on optimizing Meta tags and improving Internal linking. I have a specific list of keywords that I want to target. I need the website to be looked at, all the internalk links looked at, the URLs changed and any redirect issue resolved. There are not many pages, and they need to be corrected. For the right person, there will be ongoing work. Ideal Skills and Experience: - Proven experience with Shopify and SEO - Expertise in On-page SEO - Proficient in Meta tag optimization - Skilled in enhancing Internal linking - URL changes based on keywords - Ability to work with predefined keywords - Good communication skills for understanding project require...

...need you to design the SDR system I need and Provide the list of inexpensive equipment, instructions to assemble the handheld unit, and I need you to build the software I need. Please send me samples of your SDR projects that are similar to what I need. I want to be able to detect distance, strength, direction, interference, etc... including elevation, and to be able to 3D graphic map everything. I would like to analyze 1Hz to 300GHz I know this is a wide spectrum, can you design an all in one small handheld that is inexpensive and that can see all these frequencies? The device needs to be handheld portable that is inexpensive and easy to assemble and get working. You will provide and easy to a...

I'm OK to have less bids. In fact without SEO if you can not increase traffic don't bid. Dont sell me SEO. It will be done by someone. Don't ask me for SEO/ meeting. If I send email to 20 people in family to see site via email or whatsapp, it will work for $0. What will you do? If I have time, I can put a flyer in mail boxes of local houses in USA - cost my time and flyer print out cost.. Think outside the box. ofcourse you can not say exact # of traffic//.range is fine/./ what will you do for cost is fine. I’m looking for a professional who can help increase real traffic to my website. The primary goal is to attract more visitors, specifically USA based adults or retail investors, to my site. This project is looking fo...

...LinkedIn specialist for a 30-day project to manage lead generation and outreach campaigns for two businesses: 1. Your Space to Heal – Focused on securing corporate speaking engagements for mental health and wellness. 2. The Luxury Recharge Collection – A community for ambitious women learning to prioritize rest and recharge. This role involves optimizing LinkedIn profiles, using Sales Navigator to target ideal clients, crafting personalized messages, and nurturing leads to build meaningful connections and drive engagement. Responsibilities: • Optimize LinkedIn profiles for both brands to align with their messaging and goals. • Set up and refine Sales Navigator filters to accurately target potential leads. &bu...

We have a platform in PHP and MySQL to manage the services we provide but we have never used it. Currently we manage everything with Excel but there are already many records and various people who work on the file. I need to load our excel database into the MySQL database and start using the tool. The excel database has 20.440 rows and 43 columns.

My website is suffering from performance issues that need urg...primarily affecting the mobile experience on user profiles or community pages. This issue is not present on desktop, making it crucial to optimize for mobile users. Skills and Experience Required: - Proficient in WordPress, WooCommerce, Dokan, Peepso, and Elementor - Strong background in website performance optimization - Experience in troubleshooting and fixing bugs - Familiarity with mobile website optimization - Ability to enhance user experience on community pages Please provide a detailed plan on how you would approach this task, as well as examples of similar projects you have successfully completed. Through WPQuery we saw that the site makes many repeated calls to various plugins, making ...

...looking for a data analyst who can help me understand and improve my customer retention. Key Metrics: - Churn Rate: I need to know how many customers are leaving and why. - Customer Lifetime Value (CLV): Understanding the total worth of my customers over the whole period of their relationship with the company is crucial. - Repeat Purchase Rate: I want to keep track of how often my customers are purchasing again for our one-off orders (outside of our usual subscription purchases) and to separate these orders so we can analyse the average order contents - Analysis of CAC across paid ads & e-mail marketing and variation over time Our orders are processed through Shopify but the subscriptions are managed through Recharge so it will be a case of loo...

I'm seeking a dedicated individual to help raise awareness for a cause within our local neighborhood. Your primary task will be distributing flyers about an upcoming event. Key Responsibilities: - Distributing flyers in a local neighborhood. - Ensuring that the flyers reach as many households as possible. What to Include on the Flyers: - Event details. Ideal Skills and Experience: - Previous experience in leaflet distribution or similar roles. - Good communication skills and ability to engage with the local community. - Reliable and responsible.

Project Description: I am looking for a creative and professional logo designer to develop a clean, elegant, and nature-inspired logo for my brand, Spring Everlasting. The design should represent growth, vitality, and timeless beauty in a minimalist and sophisticated way. Logo Requirements: Minimalist & Elegant – The design should be clean, simple, and modern. Nature-Inspired – Incorporate elements like plants, flowers, leaves, or abstract organic shapes to symbolize renewal and endurance. Soft & Earthy Colors – Use natural tones such as greens, warm neutrals, and soft florals, but the logo should also be adaptable to monochrome. Timeless & Versatile – The logo should be scalable and work well across digital platforms, packag...

We require a Wordpress Plugin for an award-winning British company that has been featured on BBC World News and many other media. There will be lots more work when this is done, we work on an ongoing basis with Freelancers, usually for many years (100% 5 Star Reviews for many years on Freelancer) Here are the details:

Hi, i need somebody who can set up my campaing (switch from clicks to leads) and seet everything up so i can measure and see how many people actually fill out the form or click on call button.

...business analytics and forecasting tools to public and private companies as well as institutional investors. Reval is a 20-year-old company focused on designing and implementing proprietary SaaS solutions and applications for market and competitive analysis. We are leaders in our product categories and our customers include many of the biggest listed companies in the U.S Job Description: We are seeking an experienced Automation Test Consultant to consult our team and lead efforts in test automation for both new and existing systems. The ideal candidate will have at least 10 years of experience in software quality assurance and test automation, with a deep understanding of testing methodologies, tools, and frameworks. This role requires a hands-on approach to...

I am in need of a highly skilled Java and Spring Boot developer with extensive experience in AWS. The primary task will be to deploy a project following this installation guide: Post-deployment, I require modifications across the entire project which includes: - UI/UX adjustments - Backend functionality changes - Database/schema alterations A significant part of the project will also involve modifying and integrating API's into the backend. Specifically, I need: - Expert-level API integration - Incorporation of third-party data services Ideal candidates should have: - Comprehensive Java and Spring Boot knowledge - Proven AWS deployment experience - Strong backend modification skills - UI/UX design capability - Expertise

I am seeking a highly skilled senior technical de...developer with extensive AEM expertise, particularly in component development, to assist with website development. The ideal candidate should be proficient in various Java frameworks and libraries, specifically Spring, Hibernate, and Apache Commons. Key Skills and Experience: - Senior level experience in AEM - Extensive experience in website development - Proficiency in Java with a focus on Spring, Hibernate, and Apache Commons - Strong problem-solving skills and attention to detail - Excellent communication skills for effective collaboration This role is pivotal in enhancing our website's performance and overall user experience. If you meet these qualifications and have a passion for web development, I...

I am seeking a highly skilled senior technical de...developer with extensive AEM expertise, particularly in component development, to assist with website development. The ideal candidate should be proficient in various Java frameworks and libraries, specifically Spring, Hibernate, and Apache Commons. Key Skills and Experience: - Senior level experience in AEM - Extensive experience in website development - Proficiency in Java with a focus on Spring, Hibernate, and Apache Commons - Strong problem-solving skills and attention to detail - Excellent communication skills for effective collaboration This role is pivotal in enhancing our website's performance and overall user experience. If you meet these qualifications and have a passion for web development, I...

I am seeking a highly skilled senior technical de...developer with extensive AEM expertise, particularly in component development, to assist with website development. The ideal candidate should be proficient in various Java frameworks and libraries, specifically Spring, Hibernate, and Apache Commons. Key Skills and Experience: - Senior level experience in AEM - Extensive experience in website development - Proficiency in Java with a focus on Spring, Hibernate, and Apache Commons - Strong problem-solving skills and attention to detail - Excellent communication skills for effective collaboration This role is pivotal in enhancing our website's performance and overall user experience. If you meet these qualifications and have a passion for web development, I...

...drawing. As a gift for a friend, I would like you to recreate a small painting or drawing memorializing a drunk fight between him and myself on our mutual birthday trip to Las Vegas (it was over something very silly, and we got over it immediately). It certainly does not need to be hyper realistic, and as long as it dramatizes and catches the spirit of the moment I will be so happy. I am almost picturing a baroque style painting depicting the chaos. Can also be like a cartoon with caricatures. If you think you can roughly do it, in the next steps I will explain the specifics of the scene and what I want in it (it is not too complicated, and you can take many liberties), and I will send you pictures of the few friends I need in the picture (just to get ...

...skilled developer to convert my existing NodeJS data processing program to Java. The current program is built on the framework and is primarily used for handling data. Key Requirements: - Proficient in both NodeJS and Java, with extensive experience in data processing. - Familiar with the framework to understand the current program's structure and functionality. - Expertise in Spring Boot, as this will be the primary library used for the conversion. Ideal Skills: - Strong understanding of data processing techniques and methodologies. - Ability to translate NodeJS logic into Java effectively. - Experience working with and Spring Boot. Please note that the primary function of the program is data proce...

I am looking for a modern-styled logo for a specific community within the Church. The community is Veterans, military servants. The new design should be able to reference our existing church logo, which I provided. Key requirements: - A keen eye for modern design. Type is SJE4Veterans - Ability to seamlessly integrate certain elements from our existing logo which is attached. - Proficiency in creating minimalist designs that will print well on many surfaces. - Strong communication skills for understanding and incorporating feedback Please note, the new logo should primarily use red, white and blue for patriotism. The logo is for Veterans, who require red, white and blue.

Need experience algo trader with ninjatrader and tradingview (projects eventually) I have a concept that includes BSL, SSL, swing high/low, FVGs, OBs Questions for coder: 1. how many years of trading ICT concepts do you have? 2. Do you understand L2 dom and order flow? explain a script that used orderflow analysis 3. What was the highest success rate you made with a indicator (if you have a picture please share the backtest with proof of technical competency) 4. Would you be open to partnering up as I have many requests for custom scripts and algo each month.

...that users are of legal age to gamble. Responsible Gambling: Implement features like self-exclusion, deposit limits, and resources for people who may have gambling problems. Data Protection: Make sure your site complies with GDPR, CCPA, or other relevant data privacy laws. 2. Platform Development Technology Stack: Choose the right technologies for the front-end, back-end, and database. Common technologies used in betting sites are: Front-end: HTML, CSS, JavaScript (React, Angular) Back-end: Node.js, Python, Ruby on Rails Database: MySQL, PostgreSQL, or NoSQL solutions (MongoDB) Betting Engine: You'll need to develop a custom or licensed betting engine to handle odds, betting options, and live updates. Real-Time Data: Use APIs ...

Goal Design a user-friendly UX for website that simplifies and organizes the browsing, and promotion of events. The system must handle a large amount of data while effectively managing event overlaps. NO AI GENERATED SAMPLES ACCEPTED Key Functional Requirements 1. List View Objective: Provide a quick overview of events. Features: Chronological listing of events. Filters to refine events by location, date, type, and target audience. Highlighted events using visual cues (e.g., colors or icons). Paginated list to manage large data sets efficiently. 2. Filtering and Search Objective: Allow users to quickly find relevant events. Features: Filter by location (national, regional, city-level). Filter by date range (e.g., this week, next month). Filter by eve...

...experienced animator to create a 30-second animated video featuring our characters, Louie Lambo (a green gecko) and his partner, a cool panda. This animated video is for a memecoin project, and it will be action-packed, humorous, and showcase the two characters effortlessly dispatching a group of animals representing other memecoins in the market. Key Details for the Animation: Length: 30 seconds Style: 2D animation (modern, fun, and lively) Characters: Louie Lambo: A confident green gecko wearing a sharp suit, sunglasses, and a glowing XRP championship belt. Panda: Louie’s cool, calm, and collected sidekick. Antagonists (other memecoins): A group of animals surrounding Louie and Panda, representing rival memecoins. Photos of these animals will be provided. Scenes to...

I'm looking for an experienced developer to integrate Stripe Payouts into my website. The site is built using Java Spring Boot, so expertise in this framework is a must. Key Requirements: - Proven experience with Stripe integrations, particularly Payouts. - Strong expertise in Java Spring Boot. - Ability to deliver a seamless, secure and efficient integration. Please share your relevant experience and examples of similar projects you've completed. Looking forward to your proposals.

I need a Spring Boot expert to finalize an almost complete password change feature. The system should allow users to change their passwords in the Settings module, with the following functionalities: - Pre-filling user information from the User table. - New password input. - Verification of password against security requirements using the Passay library. - Encryption of the new password and updating it in the User table. - Displaying a confirmation of the password change. You will also need to handle an alternative flow for invalid passwords, where the system displays an error and the user can try inputting a new password. You don't need to worry about the integration with Docker, PostgreSQL, or Thymeleaf, all of that is already set up. Your main ...

...periods) on plants and animals. Links to up to 4 add on recommended items with photo. Customize Cart and or Checkout - Cart must display terms of the Sale and Shipping times with a link to full terms of sale and a $10 cancel order fee before a (all information about text that must be on the cart page will be provided). "Continue to Checkout" button. - Custom Wishlist / Check Order Status which I think we can use the VITALS app for both of these or the shopify site itself so customers can keep track of everything. - Custom Emails providing customers with all information on track, how to sign up for the following delivery customized services for your residence FREE (links to each) UPS My Choice® (Free), USPS Informed Delivery® (F...

I'm seeking a skilled web developer to enhance user interactions on my webpage through an interactive browser window feature. This will involve the implementation of interactive animations with dynamic effects, ensuring an engaging and stimulating user experience. Key Project Requirements: - Develop an interactive browser window to be accessed from a designated page. - Incorporate interactive animations such as moving elements, changing shapes, and other engaging visuals. - Utilize dynamic effects for the animations, creating an energetic and captivating experience.

...on plants and animals. Links to up to 4 add on recommended items with photo. Customize Cart and or Checkout - Cart must display terms of the Sale and Shipping times with a link to full terms of sale and a $10 cancel order fee before a (all information about text that must be on the cart page will be provided). "Continue to Checkout" button. - Custom Wishlist / Check Order Status which I think we can use the VITALS app for both of these or the shopify site itself so customers can keep track of everything. - Custom Emails providing customers with all information on track, how to sign up for the following delivery customized services for your residence FREE (links to each) UPS My Choice® (Free), USPS Informed Delivery® (Free)...

We need to set up a progress plan and resource plan in google sheet. This is quite similar to MS project or Smartsheet, and many other tools. But we need this in google sheet, where we also need to be able to easily see where the resources are, shown as both a timeline / gantt, and in calendar view. This means that we must be able to choose between the project list and the resource list in terms of display, and here we can choose between seeing it as a timeline and a calendar. Need it done asap. See attached screenshots.

We are a small healthcare start-up based in the UK. We have an iOS and Android App built using -React native. -Firebase The App has been live for 2 years with many thousands of users. We use Firebase as a backend database. We are looking for a long-term development partner. The app is currently live on Android and iOS. 1. The Android app needs an API update. 2. The Android app also needs a Billing library update. 3. Update iOS app firmware too. 4. Successfully upload to iOS and Android stores 5. Fix some minor bugs 6. Improve user interface This will be the first stage, I am looking for more updates later on.

...need you to design the SDR system I need and Provide the list of inexpensive equipment, instructions to assemble the handheld unit, and I need you to build the software I need. Please send me samples of your SDR projects that are close to what I need. I want to be able to detect distance, strength, direction, interference, etc... including elevation, and to be able to 3D graphic map everything. I would like to analyze 1Hz to 300GHz I know this is a wide spectrum, can you design an all in one small handheld that is inexpensive and that can see all these frequencies? The device needs to be handheld portable that is inexpensive and easy to assemble and get working. You will provide and easy to ass...

For now, I'm looking for an HMTL and CSS expert to update one page in my domain so that it is formatted correctly whether it is accessed on a laptop, desktop or phone, the user changes the text size either up or down, or the uder modifies the screen size. In other words, on a desktop at 100 percent, the page is formatted correctly, but on a laptop the format is off, or the user changing the size of the screen wrecks havoc with the contents. My guess is it should take no more than two hours for someone versed in the above. Must live in the United States--living near Philadelphia is a major plus-- and send me your email so I can get in touch with you directly if 'd you'd like me to consider your bid. Please do not send me links to Facebook or othe...

About Us: We are a dynamic and fast-growing social trading platform, empowering traders to leverage cutting-edge Machine learning AI Models and share trade ideas within a thriving community. Our team of seasoned traders consistently delivers remarkable results, and we’re expanding to bring on more talented individuals to use our platform and tools to improve their trading. We’ve established partnerships with funds managing $200 million in AUM and have spent 7 figures developing these AI forecasting models. They’re partnered with funds exceeding $6 billion under management. Every trader has said they have never seen tools as good as this. And we have amazing reviews and case studies from our clients. We’ve also recently developed a softw...

I am looking for a developer or team to build a basic version of a local discovery platform. The platform should allow users to browse and search for local businesses, events, and services. The project must focus on core functionalities, with potential for future enhancements. Project Scope: Frontend Development: Develop a responsive UI using ReactJS. Include a homepage, category listing, search functionality, and a simple user registration/login. Backend Development: Create RESTful APIs using Java (Spring Boot preferred). APIs to support user authentication, business/event data retrieval, and category management. Database: Use MySQL for basic data storage. Include tables for businesses, users, events, and categories. Key Features: Dynamic se...

Points to Work On: Considering that the website’s color palette must be respected, and ensuring that, despite the complexity, the information remains simple and clear for the user. Currently, my website operates with two different filters or search engines: H-Book and WP-Booking, which means the client has to perform two searches. This greatly affects usability, and it also creates difficulties for me to manage two calendars and many plugins. Therefore, I’d like to simplify it with just one search engine. --- 1. CHECK IF EVERYTHING CAN BE DONE WITH H-BOOK Unify and optimize the search filter: Remove the current search filter from WP-Booking, which only shows available houses. Keep and improve the H-Book filter, configuring it to ...

Please Note: We’ve included a few screening questions at the end of this listing. Answering them is important for us to understand your experience and fit for the role. Proposals without answers may not be considered. Overview: We’re a small agency looking for a versatile professional who can “wear two hats” during this growth phase. In this full-time, remote role, you’ll balance responsibilities between managing HubSpot operations and contributing to development projects. This position is ideal for someone who thrives in a flexible, collaborative environment and wants to help shape our tools and processes as we expand. --- Key Responsibilities HubSpot Administration: - Design, optimize, and troubleshoot workflows for marketing...

We are seeking a detail-oriented and creative specialist to rename JPEG files based on their content and the ideas they convey. This is a long-term position with steady daily work. Responsibilities: - Rename 1,000 files per day, 6 days a week. - Create descriptive and meaningful file names with a minimum of two words (preferably more, if it enhances clarity). - Use underscores (_) instead of spaces in file names (e.g., ). - Retain the original file name and append the new name to it (e.g., becomes ). - Focus on conveying the concept or meaning of the image rather than describing it literally. For example, an image of a person holding a flag on a mountain should reflect themes like "achievement," "success

I'm currently grappling with Many-to-Many relationships in Power Pivot, specifically dealing with sales and event data by SKU. My primary aim is to enhance the precision of my data analysis. However, I'm facing difficulties with incorrect data aggregation. I cannot build a relationship from the Proof and Unique Events table in the photo provided. Skills and Experience Needed: - Extensive experience with Power Pivot - Proficient in managing and interpreting sales data - Expert-level understanding of Many-to-Many relationships - Ability to troubleshoot data aggregation issues

...that do not incorporate it will be rejected. I have a concept drawing that I would like to be turned into a final product. This design will serve as inspiration for a copper backsplash in my home. The primary style is rustic, so the design should reflect this. Key elements to include: - Shapes from the concept drawing. - The finish should be an antique style, as opposed to matte or polished. Ideal skills and experience for the job: - Strong background in interior design, particularly with rustic styles. - Proficient in design software to create a detailed and accurate final product. - Ability to interpret and work from a concept drawing. -Add background features such as mountains and lake shoreline to the concept drawing -Inspiration is ch...

I'm in search of a skilled developer or team to help design and develop a personal alarm services app. This app needs to be available on both iOS and Android platforms. Key Features: - Emergency Alerts: The app should be able to send out emergency alerts at the touch of a button. - Location Tracking: The app should include a reliable location tracking feature, providing real-time updates. - Health Monitoring: A health monitoring feature is also required, keeping track of critical health parameters. User Interface: - I'm open to any type of user interface for the app, whether it's simple and minimalistic, modern and stylish, or highly detailed with many options. However, it should be intuitive and user-friendly. Ideal Skills and Experien...

... People can connect with friends or friends of friends to complete tasks together. - **Task-Based:** The platform focuses on assigning and completing simple tasks in real life. - **User-Created Tasks:** Participants can create their own tasks, tailoring them to their preferences and social circles. - **Real-World Engagement:** The tasks encourage participants to meet up in person, fostering real-world interaction. ### **Task Concept** The platform sends a series of messages to participants: - **Message Chain:** Each participant receives a message with a task to do together. - **Example:** One participant gets a message saying, "Invite your friend for a cup of coffee." They press "Okay," and the next message goes to...

I'm looking for a web-based program that can help me keep track of job participants, their payment statuses, and visualize data through a bar chart. Key Features: - Each participant should have a unique ID for identification. - A section to add new participants, requiring their Name and Contact Details, Date Joined and Payment Status. - Capability to indicate how many people are involved in a job and how many have made a payment. - A chart to visualize the number of participants added each month. Access: - Users should be able to log in with a Username and Password. Ideal Skills: - Proficiency in web development. - Experience with data visualization and creating interactive charts. - Knowledge in user authentication systems.