Php upload script system jobs

I'm in need of a skilled PHP developer to create a website much like www.websiteoutlook.com. The key features of the site will include: - The ability to provide website statistics - Domain information lookup - Primarily an information-driven purpose I'm looking for a professional who can deliver a high-quality site that is user-friendly and functional. The main skills required for this project are: - Proficiency in PHP - Experience in website development - Good understanding of website statistics and domain lookup services Experience with creating similar sites would be a plus.

...programmer to help me seamlessly connect several key game systems. The project involves integrating the following: - **Skills System**: This is primarily managed through an existing asset from the unity asset store which forms the basis of our skill tree. You'll need to ensure that this integrates smoothly with the other systems. - **NPC Skills**: The NPCs within our game possess unique skills that need to be effectively linked to the Skills System. This includes the implementation of a variety of AI skills . - **Class System**: Our game has distinct classes that heavily influence the Skills System. Each class should have its own unique skill tree. Additionally, we have a system in place where NPCs' clothing changes depending on the class ...

I am looking to innovate my paintshop's inventory management by implementing a QR Code system. The system will involve each paint tin being assigned a unique QR code, which will be printed onto a sticker. This QR code will have the product name and product code printed underneath it. Key Tasks: - Generating a unique QR code for each paint tin - Printing the QR code and product details on a sticker in color - Ensuring the QR code can be scanned by mobile devices - Ensuring the product name and code are prominently displayed - Ensuring the stickers are durable and able to withstand the paintshop environment This system will serve a few purposes: - Tracking Consumption: Our staff can scan the QR code when they use up a tin, allowing us to track consumption in real...

I'm seeking an AI expert who can develop a highly accurate animal recognition system that specifically focuses on cats and dogs. The system should be designed to: - Achieve very high accuracy in identifying the animals - Differentiate between cats and dogs in the images - Prioritize the identification of the most prominent animal in an image In essence, the AI should be capable of matching a single photo of a cat or a dog to multiple images of lost animals in my archive, enabling me to identify the lost pet more efficiently. I expect the freelancer to have a profound understanding of artificial intelligence, machine learning, image recognition technologies, and ideally prior experience in developing similar systems. The system's accuracy and efficiency are essent...

...primarily for our understanding of customer preferences. Our aim is to make this process efficient and hassle-free for both the users and for my team. The collected information should be sent directly to my email. This way, I can access and process the data promptly. Key Points: - Form should be designed with text fields for open answers, and dropdown menus for predefined options, and the ability to upload images and other things. - Responsive design is essential. Customers will use this feature on various devices so it should work seamlessly on all screen sizes. Ideal skills for this project: - Proficiency in web development with experience in designing user-friendly forms. - Understanding of efficient and secure data handling. - Good communication and adherence to deadlines...

I'm seeking a proficient scriptwriter to design an Airtable script that can effectively combine data from a single table that consists of parent-child relationships. The main task for this script will be to focus on combining data from the parent-child and combining it onto 1 row each. Specifically, the required updates will involve: - Combining Parent and all children data onto same row - Taking DOB field and splitting into a Month field and a Year field - The end result should be a base where I can upload a new CSV and it outputs the desired result into a new table that I can download a csv from The ideal candidate for this role is someone well-versed with airtable scripting and data management, specifically having a strong knowledge of number fields. Your e...

I require a skilled Python programmer to craft a script that would allow me to login into my account on and download all the videos stored there. The details are as follows: - The operating system this script will be running on is Windows - The script should also classify the downloaded videos into different folders on my PC, labeled according to the team name each video corresponds with. - The hired freelancer may have to study Veo's UI for this purpose. - I'd need this task completed ASAP. Ideal skills and experience: - Previous experience with Web Scraping and handling Video files - Extensive knowledge of Python with specific experience writing scripts - Understanding of Video download and organization, preferably with the Veo platform - Quick ex...

I require an IoT expert to create an advanced system for a parking boom barrier. The end result should be a fully functional, IoT-enabled device. Key areas of functionality to be incorporated are: - Automatic vehicle detection - Real-time data monitoring - Mobile app integration The automatic vehicle detection system should be implemented using: - License plate recognition - RFID tags - Sensors for detecting vehicle presence The ideal candidate for this project should have demonstrable experience in IoT device creation, sensor technology, mobile app integration, and real-time data monitoring. Knowledge in license plate recognition and RFID tags usage is a huge plus. Your expertise will be vital in bringing this project to life.

I am in need of a qualified Laravel PHP programmer to develop an investment system along with a lottery on my web platform. - Key features: The system will include ticket purchasing and selection, as well as random number generation. - Ticket purchasing process: I imagine a system that offers a combination of manual and automatic ticket selection. - Additional Implementations: I also require the integration of real-time notifications, layout adjustments and club implementation for subscribers. Ideal candidates must have: - Knowledge of PHP and Laravel programming - Previous experience developing lottery systems or similar platforms - Proficiency in integrating real-time notifications and customizing user profile - Experience creating engaging layouts an...

I'm in need of a script that can load a list of proxies/ IPs and establish a rotating SSH tunnel connection through these proxies. The purpose of this is to maintain anonymity. Key Requirements: - The script should be designed for Windows OS and in exe or bat extension - It needs to handle failed connections by moving on to the next proxy in the list immediately - The script should interact with an OpenSSH server installed on my personal computer Ideal Skills: - Proficiency in scripting for Windows environments - Experience with creating and managing SSH tunnels - Understanding of proxy management and error handling The primary goal of this script is to ensure a seamless, rotating connection through proxies for anonymity. The ability to move on to the ne...

I need a professional content creator skilled in human development to provide me with 30 video scripts and ideas for my business centered on getting rid of old block how nervous system control you, personal growth, overcoming fears, and building self-confidence. Each script should be educational and informative, while maintaining a concise length of 1-3 minutes. Key Requirements: - A solid understanding of human development, personal growth, and related topics - Proven experience in creating concise and engaging video scripts - Ability to convey complex information in an easy-to-understand manner - Strong writing skills with a focus on educational content - Previous experience with similar projects is highly preferred Your work will play a crucial role in helping individua...

I am seeking a skilled professional to craft a comprehensive plan for a hybrid solar and wind energy system sufficient to power my entire home. Located in an area with a balanced mix of both wind and sun, I am confident that the right energy solution can be reached. The successful candidate for this project should possess: - Extensive knowledge in renewable energy, specifically wind and solar systems - Prior experience in designing home-scale energy systems - Familiarity with homes that lack an existing energy system - Creativity and innovative thinking in devising energy solutions. A detailed understanding of local weather patterns and the way they can affect energy production from solar and wind power would also be of great advantage. This project marks the beginning of ...

I am currently in search of a seasoned Business System Analyst with an in-depth understanding of both residential and commercial construction operations. Key Responsibilities: - Provide comprehensive business analyses that will contribute to the streamlining of project management processes. - Utilize analytical expertise to optimize our cost estimation procedures, improving accuracy and financial efficiency. - Formulate ways to enhance communication between all stakeholders involved in the construction process. - Implement sales matrix and improve financial reports to provide more data-driven insights and decisions. Ideal Skills and Experience: - Proven experience in Residential and Commercial Construction. - Strong skills in business system analysis, project management, c...

Calculate LCOE for Solar PV System Description: Seeking an expert to compute the Levelized Cost of Electricity (LCOE) for a solar PV system based on installation, maintenance costs, and energy output. Deliverables: - Detailed report with cost breakdown, annual output, and LCOE. Requirements: - Experience in solar energy analysis. - Skilled in energy modeling tools. Materials Provided: - Datasheets, performance data, and .xlsx.

...to assist us in reaching potential clients and scheduling Zoom calls to showcase our beautifully crafted websites. Responsibilities: - Utilize provided dialer, script, and lead list to make outbound calls to businesses without websites. - Engage with business owners or decision-makers to discuss our website offerings. - Schedule Zoom calls to present our pre-built website demos. - Maintain accurate records of appointments scheduled. - Requirements: - Excellent communication skills, both verbal and written. - Comfortable making outbound calls and engaging with potential clients. - Ability to effectively follow a provided script while adapting to conversation flow. - Experience in appointment setting or sales is a plus but not required. - Reliable internet connection and ...

I'm looking to develop a user-friendly platform that leverages machine learning for CV analysis and ranking. Key Components: - **CV Submission**: The platform should allow users to easily upload CVs in either PDF or DOCX format. A straightforward and intuitive UI will be crucial for user adoption. - **AI Algorithm**: The heart of the platform will be the machine learning algorithm. The ideal freelancer should have a strong background in machine learning and experience with natural language processing. They will be responsible for developing the algorithm that will assess the CVs based on the criteria provided and rank them. Key Criteria for CV Ranking: - **Relevant Work Experience**: The algorithm should be able to identify and weigh different levels of experience, giving pr...

I've developed a Replicated Key/Value Service using Primary/Backup in Golang, but I need an expert to review, enhance and ensure the project's efficiency. Key Requirements: - Focus on the efficiency of the codebase, ensuring that it is optimized for performance. - Implement mechanisms for fault tolerance in the system. Specifically, I want to implement the fault tolerance mechanism of 'Data Replication'. Ideal Freelancer: - Proficient in Golang and has experience in developing distributed systems. - Prior experience in enhancing and optimizing code efficiency. - Strong understanding of fault tolerance mechanisms in distributed systems and experience in implementing data replication.

I've started using Colibrism from codecanyon but I'm facing a few issues with the platform. If you're an expert in this area, I'd love to have your help in resolving these issues. - The main problems I'm currently facing include: - Layout Alignment: The overall layout of the site isn't aligning as it should. - Functionality Errors: Some features are not working as expe...issues. - The main problems I'm currently facing include: - Layout Alignment: The overall layout of the site isn't aligning as it should. - Functionality Errors: Some features are not working as expected. - Performance Issues: The site's performance isn't up to the mark. I need assistance in fixing these issues and ensuring that Colibrism is running smoothly. I...

I need someone to upload tiktok videos that i will provide. no editing, just uploading. no experience. all i need is you to be from the USUKCanadaNew zeland

Currently, I handle my employee payroll manually, tallying the numbers of pieces completed by each worker. I am looking for an expert who can help me transition to a piecework payroll management software, resulting in a more efficient and less time-consuming approach. Your role will include: - Implementing and setting up the software - Teaching me how to use it effectively Ideal skills and experience needed: - Experience and knowledge in payroll management particularly based on piecework - Proficient with piecework payroll software - Exceptional communication skills for effective teaching End goal: To lessen the time needed for processing payroll and enhance accuracy.

I'm seeking a talented designer to create a professional and elegant end screen for my YouTube shorts and Instagram reels. The design should be modern and sleek, matching the overall aesthetic of my content. Upload file in 2 different ways, i.e. Replace Youtube shorts "Like" icon with Insta "Heart" Icon ; Replace Youtube shorts "Subscribe" with Insta "Follow" Key Elements for Youtube Shorts & Insta Reels - Subscribe / Follow button for More Videos - Like / Heart Icon - Share - Comment - Call Icon - with Phone Number to be mentioned is - 080 - 9565 9804 - Use Logo and app download pngs attached Ideal skills for this job include: - Strong graphic design skills, with experience in creating end screens for YouTube and Instagram. - Un...

I'm seeking a skilled Excel developer to help me create a tracking system. Key Requirements: - The system should monitor the month over month membership growth for our community PCPs. - The PCP targets should be identified by name and location. Please note that this needs to be completed as soon as possible. Ideal skills for this project: - Strong proficiency in Excel and data tracking - Experience with creating dynamic systems in Excel - Attention to detail to ensure accurate tracking This will be a key tool for our organization moving forward, so I'm looking for a freelancer who can deliver high-quality work efficiently.

I've got a small Python script that runs on my desktop and I need it to be translated into C# for better integration with the rest of my software. I need a skilled programmer with experience in both Python and C#. Unfortunately, I have not been able to make the script run successfully on Windows, but it works on Linux (WSL). For: Python script (I will provide full script): import grpc from chirpstack_api import api server = "" api_token = "eyJ0eXAiOiJKV1QiLCJ......................87k2i66CulW7Y" channel = grpc.insecure_channel(server) client = (channel) auth_token = [("authorization", "Bearer %s" % api_token)] req = (dev_eui="00000000aabbccdd") resp = (req

We are seeking a skilled individual who is proficient in using the Google Play Console to publish apps. As our app developer, you will be responsible for uploading, managing, and optimizing our app listings on the Google Play Store. Responsibilities: 1. Utilize the Google Play Console to upload new app versions, including APK files, screenshots, descriptions, and other necessary assets. 2. Ensure compliance with Google Play policies and guidelines to prevent app rejection or suspension. 3. Manage app metadata, including titles, descriptions, keywords, and categories, to optimize visibility and searchability. 4. Monitor app performance metrics, including downloads, ratings, and reviews, and implement strategies to improve user engagement and retention. 5. Collaborate with the devel...

We are seeking for a developer to build a transportation app with Laravel and VueJS on web part, and flutter for mobile. A part of the system is already built. The github repositories will be shared. Documents and wireframes will be shared too. The system is composed of three parts: -Booking website: from where the clients book vans -Fleet management back-office: from where cars an trips are managed. Cars have a planning filled with booked trip. The main challenge is the availability calculation, that has a complete document wrote down. -Flutter mobile app for drivers, to check there schedules, and do reports (app already coded, to complete) It may need confirmed experience given that the initial developer (intermediate) had some difficulties winding it up. I stay at your dis...

...project is inspired by store (attached url screenshot) and involves building a user-friendly platform for "do it yourself" design promo product customization. Key Requirements: E-commerce Platform: WooCommerce Categories and Products: 4 main categories as umbrella sections 10 subcategories with individual products Customization Features: DIY drag-and-drop functionality Artwork review and approval system Project Scope: Develop a streamlined e-commerce website with WooCommerce. Implement a drag-and-drop feature for product customization. Ensure users can review and approve their custom artwork before placing orders. Design a user-friendly interface similar to the inspiration website. Deliverables: Fully functional WooCommerce website with the specified features. C...

...seeking an experienced app developer to assist us with the deployment of our Android application on the Google Play Store. The app has already been developed and tested, and we are now ready to publish it to the Google Play Store. Responsibilities: Prepare the necessary assets and documentation required for app submission. Ensure that the app meets all Google Play Store requirements and guidelines. Upload the app to the Google Play Console and manage the submission process. Address any issues or feedback from the Google Play Console team during the review process. Provide ongoing support and maintenance for app updates and revisions as needed. Requirements: AProven experience in deploying Android applications on the Google Play Store. Familiarity with the Google Play Console a...

This project consists in two stages. The first one (included on this budget) is creating an eLearning using Wix and Wix's Course App. The project will use MercadoPago as a payment gateway. Good design skills will be appreciated. The second stage (for a future budget) is improving the eLearning and switching into a CMS, in which other users will be able to upload their courses and get paid through the platform.

Seeking an experienced mobile app developer to craft a robust taxi booking platform for both Android and iOS and web application. Key features include: - GPS tracking for real-time location updates. - Secure in-app payments and cash - Driver ratings and reviews for user feedback. - Admin panel for route and user management, analytics, and reporting. - UX/UI design focusing on accessibility and inclusivity. - Conducting user research, creating persona profiles, designing intuitive flows, and developing high-fidelity prototypes. - Ensuring a consistent, modern visual identity. - App development encompassing user registration, real-time mapping, route browsing, booking requests, messaging, push notifications, payment integration, and driver functionalities. I will show you an example app ...

...experience 3.) Proficiency in Sabre and/or Amadeus is essential 4.) Familiarity with Award Bookings and Hidden City strategies would prioritise you for consideration We're looking for a flexible and creative problem solver who can leverage their expertise to curate bespoke itineraries for our discerning clientele. We hope you’ll join us in shaping the future of luxury travel.  If interested, please upload a CV and cover letter introducing yourself. Please note that the remuneration package will be based upon the skill level of the successful applicant. Thanks, we look forward to meeting you!...

Looking for scraping expert to write scraper script to download from a website that has captcha. The scraper script must be Windows executable .exe file that is very easy for non-technical user to just open and run.

...difference) to record a short script for a sports studio show introduction. The ideal candidate should have a female voice with an energetic tone, and be able to deliver with high energy and enthusiasm. Key requirements: - Energetic delivery: The script is designed to engage the audience right from the start, so a need for a high energy delivery is crucial. - Quick turnaround: The script is roughly 6 to 7 seconds long, so a quick turnaround time is crucial. This project is perfect for a voice over artist with experience in providing engaging and energetic voice overs, particularly for studio shows, sports or similar themes. Here is a link to our show with pronunciation of Doug Kezirian's name. We have also included our 17 word script. We would like ...

I'm looking to develop an automation system specifically for appointment bookings. The key goal of this project is to streamline and simplify the booking process. Key Features: - The system should feature automated reminders. This would improve the efficiency of keeping track and reminding clients about their appointments. - Handling booking duties the way I desire is a must-feature. This would eliminate the need for manual handling of appointments. Ideal Skills and Experience: - Experienced in automation development. - Past projects involving similar appointment booking systems. - Experience in integrating automated reminders in software.

I'm in need of an experienced PHP+Android developer to assist in integrating a Recharge API. Key Responsibilities: - Implementing necessary API endpoints - Ensuring proper error handling and input validation - Creating a seamless integration between the app and the API Experience: - Proficiency in PHP, Android, and API integration - Strong understanding of error handling and validation best practices - Prior experience in implementing payment gateways or similar API integrations would be an added advantage Please bid if you have the necessary skills and experience to deliver a robust and user-friendly recharge system.

I am in need of a skilled developer to create a robust EV charging system with a custom backend. Key Functionality: - User Management: I need a system that supports user authentication and management. This includes user registration, login, and profile management. - Real-time Updates: The system should provide real-time status updates on the charging stations. This is essential for user convenience and system monitoring. - Payment Integration: I want to integrate a payment processing system. This should support invoicing and be capable of handling different payment methods. - OCPI and OCPP Integration: The ability to work with these standard protocols is a must. Backend Specification: - Web Socket Support: The backend server must support web sockets to ...

I need a team of skilled developers to create a comprehensive Health Management System for our hospital network that integrates several key functions. - Importantly, this system must offer centralized operations to ensure smooth functioning across all departments. - I expect it to automate the following operations: Laboratory, Pharmacy, Billing, Human Resources, as well as specific functions like EPMS for HIV and TB management. - Additionally, the system should be designed to handle patient records in a hybrid manner - combining both electronic and paper-based record-keeping. - There is also a requirement for this system to seamlessly integrate with external systems, specifically insurance company systems, other healthcare facilities, and laboratory in...

I need a robust system capable of managing various aspects of my business - from training programs booking, customer registration, to affiliate tracking. Key features for the booking system: - Online payment processing - Availability calendar - Booking reminders - Program management Customer registration should be seamless with: - Email verification - Social media login option - Custom registration form The affiliate program needs to have: - Referral tracking - Commission tracking - Provision for promotional materials The perfect candidate for this project should be proficient in website development and have prior experience in building affiliate programs and booking systems. Understanding of online payment processing is a must.

I require a professional Python script to scrape a website for data. Key Requirements: - The script should be designed for a one-time run - The website does not have JavaScript dynamic content, so the script does not need to handle dynamic content The ideal freelancer for this project should have prior experience in: - Python programming - Web scraping - Handling static web content

Hello, I upload my SVG logo on my Wordpress website. I need someone that knows how to work with SVG & code, because he need to resize it to make it inline with the header. (in I think)

...search of a PHP Developer with a proven track record of developing comprehensive ERP Solutions for the construction industry. Key Modules Required: - Project Management - Cost Estimation - Procurement Specific Features for Project Management: - Task Management: The system should allow for easy task assignment and monitoring. - Resource Allocation: It should have a robust system for allocating and tracking resources. Specific Requirements for Cost Estimation: - Integrated Cost Database: The system should have a vast and well-organized cost database. - Calculation Formulas: It should accommodate complex estimation formulas. - Reporting and Analytics: The ability to generate detailed reports and analytics is crucial. Ideal Candidate: - Should have a strong...

I have a Python script that needs integration with a Telegram bot. The requirement is to connect the code with the Telegram bot to send questions from the Chegg website. Key tasks: - Integrating the existing Python code with a Telegram bot to send questions from the Chegg website - Automating the assignment of student IDs for each Chegg website task The ideal freelancer should have: - Proven experience in Python programming - Previous work with Telegram bot integration - Familiarity with Chegg website tasks and automation - Good understanding of API integrations Please share your relevant experience and any insights into how you plan to approach this integration.

1, Build a KMS SharePoint library with the listed Metadata below 2, Each of the sectors will have 1 or more than 1 sector responders 3, KMS admin can upload the document, but the status is Draft. 4, KMS admin needs to assign at least the sector and document type of the uploaded document. then will request approval from the sector responders. once the document is approved, the status will change to Approved, Then the document number will be automatically generated, and the review date will for 2 years after the document is approved. 5, In any document library users can post by a power automate script (a form that at least has "the sector" and "document type") their document or PDF to KMS, then the file will be copied to KMS as a Draft, then an email approv...

I'm...voice-over actor to lend his humor-filled, unique voice to a commercial project. A standard Georgian accent is required to bring authenticity to the project. The ideal candidate should have: - Experience in commercial voice acting - An ability to deliver a performance with a humorous tone - A Standard Georgian accent We are looking for a VO male actor to dub entertainment videos. We need translation ( script is given in English ), VO, and sync. We have a potentially large volume order, so consider please as a long-term cooperation. Approximately 4-5 videos weekly ( 125$ per 5 episodes )-could be negotiable The average length of the video is under 15 minutes. Let me know please if you are interested additionally will ask you to do a short demo. Contact me for more deta...

My PHP email sending platform is not functioning as expected. I've reviewed the code but I can't determine the root cause. If you're confident in your PHP skills and have experience with email sending, your help would be appreciated. Key areas for investigation and resolution include: - Reviewing the existing PHP email sending code for potential issues - Identifying any SMTP server configuration issues - Resolving any errors to ensure the email sending functionality works as intended Ideal Skills & Experience: - Proficient in PHP, with a strong understanding of email sending methods - Experience in debugging PHP applications and resolving SMTP server configuration issues

I'm a huge fan of the show Gravity Falls. I'm looking for an experienced scriptwriter to write a script for a hypothetical Season 3 and 4. Key Details: - Tone: I want the new seasons to maintain the mysterious vibe that the show is known for. I'm not looking for a complete tone shift. - Audience: The script should be tailored towards a teenage audience. It should be sophisticated enough to keep older viewers engaged, but not too complex for its target demographic. - Characters: While I'd like to introduce some new characters, they should be minor. The focus should be on the existing characters, their development, and the continued exploration of the show's existing mysteries. Skills & Experience: - Proven experience in scriptwriting, particular...

I'm in need of a system that efficiently and accurately captures and records detailed customer policy information. Key information to gather includes: - Policy Information - Policy Type - Effective Date - Expiration Date - Premium - Carrier Company This information will help us keep accurate records, keep track of expiration dates, and better understand the coverage our clients have. The ideal person for this job would have experience in CRM development, database management, and a strong understanding of data privacy and security matters. Your task will be to set up a data capture followed by populating those information into our database. Understanding of insurance company's workflow will be an added advantage.

We are seeking a skilled individual who is proficient in using the Google Play Console to publish apps. As our app developer, you will be responsible for uploading, managing, and optimizing our app listings on the Google Play Store. Responsibilities: 1. Utilize the Google Play Console to upload new app versions, including APK files, screenshots, descriptions, and other necessary assets. 2. Ensure compliance with Google Play policies and guidelines to prevent app rejection or suspension. 3. Manage app metadata, including titles, descriptions, keywords, and categories, to optimize visibility and searchability. 4. Monitor app performance metrics, including downloads, ratings, and reviews, and implement strategies to improve user engagement and retention. 5. Collaborate with the devel...

...Develop a custom script on Vertex AI to: * Scrape content from web pages (titles, headings, body text). If scraping is not feasible, allow for manual input of content. * Utilize Gemini to generate SEO-optimized meta titles and descriptions based on the scraped/input content. * Ensure the script can handle both automated scraping and manual content input scenarios. Requirements: * Proficiency: Strong experience with Google Cloud Platform, Vertex AI, Python (or similar language), and web scraping techniques. * Google Sheets Integration: Experience with Google Sheets API for seamless data flow. Deliverables: * Two Functional Vertex AI Applications: * E-commerce product title/description generator (Feedgen-based). * Website meta tag generator (custom ...

Android app play console setup and upload

I'm in need of a Wix developer who can help me with adding custom features and functionalities to my website. I am trying to do the database structure for this page Each projects will load a list of tasks filtered by six different stages Each task needs to be comleted by the supervisor with acomment, photo/video upload / schedule a future task on calendar Once submitted that task will be read only with an option to edit edit/submit logs of who changed what and when - will be recorded this is the main task And may be will look for an option to create a dashboard to view these tasks status / add documents and projects etc but not essential