Payroll systems written vbnetpráce

Ahoj, jsme malá firma, proto hledám administrátora pro Linux servery a síťové prvky, který žije v Praze – budeš řešit problémy ...nastavení cluster • Správa sítě – konfigurace a výměna prvků - switches, dohled, Správa a nastavení firewallů, včetně práce s WAF - Web Application Firewalls a aplikace na loadbalancing • Zálohování – provádění, kontrola, nastavení • Instalace, nastavení a správa VMware virtualizačního prostředí • Práce se software SIEM - Security Information and Event Manager • Práce s IPS - Intrusion Prevent Systems • Linux Deb...

I have a website selling heat exchangers. It is in Czech language. Many of the pages are also in Slovak language. I would like to expose the web also in German language. The translations have to be written into existing html files containing Czech language. The formatting should be kept, so later I can do some small fixes myself with help of an online translator. For time being, I would like to translate these pages into German 1500 words 400 words 300 words 100 words 200 words 1200 words 1000 words https://www.vymeniky-tepla

I need simulation model for a problem.

I need a program that will notify you when the sound pops authenticate using captcha systems. One of the boot program, which must function at the server

I need an expert to integrate a court booking plugin it into my existing wordpress website, implementing several essential functionalities. Key Requirements: - Enable online booking on our website: - Email notifications: Skilled in setting up automated emails tied to successful booking, cancellations, or chan...cancellations, or changes in booking status. - SMS Gateway - Payment Gateway I already have tried paid plugin but seems to be taking so much time so I need an expert to get this done quickly. Ideal freelancers should have a proven history of plugin integration, working knowledge of appointe booking software, and a deep understanding of automated system notifications. Familiarity with online booking systems and real-time calendar synchronization is highly desirable for thi...

I'm in need of a unique and creative logo design for my investment company. The logo will feature our company name, "Idra," written in Arabic calligraphy. Some key points to consider: - Color preference: The logo should predominantly feature the color gold, helping to convey a sense of luxury and exclusivity. - Design style: I'm looking for a logo design that is more abstract in nature, with symbolic representation. This approach should help in enhancing the name and image of our brand, reflecting our innovative and modern approach to investment. Ideal skills and experience for this project would include: - Proficiency in Arabic calligraphy - Strong portfolio demonstrating previous luxury-brand logo designs - Ability to create unique, abstract yet elegant des...

I'm looking to develop an online examination platform that caters to students. The system should include the...following features: - **Student Accounts**: Users should be able to register and use the platform as students. - **Examination Module**: The website should allow for both practice tests and real exams. - **Immediate Results**: Exam results should be displayed immediately after the exam has been taken. Ideally, I'm looking for a developer with experience in e-learning platforms or online examination systems. The developer should be proficient in backend and frontend development, be able to handle databases securely and have a good understanding of user experience. Please let me know if you've worked on similar projects in the past, and send over examples ...

I'm seeking an experienced developer to create a custom cryptocurrency payment gateway for my website. The main cryptocurrencies I want to integrate are Bitcoin, Ethereum, Litecoin, and USDT ERC20. Key Functionalities: - Secure Wallet Integration: The payment gateway should have a secure wallet integration to ensure the safety of transactions. - Payment History Tracking: I'd like a fea...Ethereum, Litecoin, and USDT ERC20 - Strong understanding of secure wallet integration - Previous projects demonstrating payment history tracking - E-commerce platform experience, especially with WooCommerce, Shopify, or Magento, would be a bonus, though not essential. Please reach out if you're confident in your ability to build this, and have a keen interest in cryptocurrency and secur...

I'm looking for a seasoned research writer with proficiency in technology, specifically FPGA software systems. The focus is on creating a comprehensive research paper on an FPGA based Accident Detection and Prevention Software. Key objectives include but are not limited to: - Understanding of real-time accident detection - Expounding on measures for accident prevention - Thorough explanation of the emergency communication system The ideal freelancer should be knowledgeable about artificial intelligence and its implementation in accident detection systems. Critically, they should be able to dissect and present complex tech language into a comprehensible writing. Evidence of past research work in this field will be a major plus.

...incorrect identification of infections. This is significantly impacting the reliability of the system and providing inaccurate results to the users. Ideal Skills and Experience: - Proficient in Python, with strong experience in bug fixing - Understanding of machine learning algorithms and image processing - Proven experience in identifying and rectifying issues in automated systems - Familiarity with leaf infection detection systems is a plus The successful candidate will be responsible for: - Conducting a thorough assessment of the existing codebase - Identifying the root cause of the incorrect identification of infections - Developing and implementing a robust solution to rectify the bug - Conducting extensive testing to ensure that the issue has been resolved satisfa...

I am in need of a skilled lead generation professional to assist in increasing the clientele of my accounting firm on Facebook The campaign will focus on: - Target region: Local businesses only in Australia - Industry: Specifically within the accounting sector. - Services to promote: Tax Preparation, Payroll Services, and Bookkeeping. - Facebook platform - Setup and Running You should ideally possess extensive experience in lead generation, targeting, and digital marketing within the accounting sector. Skills in running local campaigns and knowledge of the accounting industry would be a significant advantage in this role. A good understanding of the services we provide is mandatory for crafting persuasive marketing content. Establishing and running this successful lead ge...

I am seeking a talented website designer to create an e-commerce website for my business. The most critical aspect of the site is the product catalog, as I want my customer...professional design that not only showcases the products but also reflects the brand image. - As I have an existing inventory system, I would like the products to be integrated seamlessly into the website. Ideal skills and experience: - Proven experience in designing and developing e-commerce websites, particularly with a strong focus on product catalog design. - Knowledge of inventory management systems and experience in integrating them with websites. - Excellent graphic design skills to create a visually appealing interface. - Ability to understand and translate the brand's message and customer needs i...

I require an intricate hardware developer with technical mastery to custom design an isolated encoder signal splitter board that's compatible with Arduino micro-controller, specifically ATmega2560. Key Features: 1. Voltage Isolation: The board must feature voltage isolation t...communication should be provided via USB. 4. Use micro-controllers with built-in boot-loader or otherwise take care of the boot-loader flashing to be compatible with Arduino framework. Preferred PCBA design software: Autodesk EAGLE or Fusion 360 Potential freelancers must possess proficient hardware development experience, Arduino platform familiarity, and a strong understanding of signal transmission systems for an effective design realization. Experience with ATmega2560 microcontroller will be an a...

I'm seeking a talented individual to create 15 products - E-commerce systems knowledge - Effective communication in English.

I'm in need of an Expert Excel programmer to help design a user-friendly Excel sheet focusing on stock and ledger management. Specifically, I'm interested in: - Incorporating Automatic Calculations: The ideal candidate should ...integration and interconnection capabilities is necessary. - Essential Data Fields: My Excel sheet needs to include specific data fields like stock name, quantity, and cost price for seamless inventory and ledger management. This project requires an excellent grasp of Excel functions, automation, and data management. Experience in inventory management systems is a big plus. Skilled in creating user-friendly, efficient, and interconnected Excel systems, you should be able to tailor an Excel sheet to deliver exactly what we need for smooth l...

I am in need of a Python developer to create a bespoke frontend for a warehouse management system. The system should primarily focus on Invento...Design: - List View: I envision the inventory management interface as a list view with search and filter options for easy access and manipulation of data. Ideal Skills and Experience: - Proven experience in Python frontend development - Strong understanding and experience in Inventory management systems - Proficiency in creating user-friendly UIs with search and filter options - Ability to distill complex data into clear and actionable insights - Previous experience with warehouse management systems would be a great advantage. If you have the skills and experience needed, I'm looking forward to hearing from you and discussin...

I'm having email sending issues with WHM and cPanel due to the HELO_NO_DOMAIN error. My primary goal is to ensure proper email authentication and prevent emails from being marked as spam. I'm also looking for help troubleshooting this issue. Ideal Skills and Experience: - Expertise in WHM and cPanel - In-depth knowledge of email delivery systems - Experience with email authentication protocols - Ability to troubleshoot HELO_NO_DOMAIN error - Familiarity with spam prevention tactics - Previous experience in resolving similar issues

...responsibilities include: - Creating a frontend with HTML, CSS, and Django - Featuring smooth navigation for different financial portfolios - Implementing functionality to monitor financial performance - Allow management of financial transactions Ideal skills and experiences: - Proficient in HTML, CSS, Django - Experience in building financial or similar web applications - Knowledge of financial systems or willing to learn - Good understanding of UI/UX principles I am looking forward to receiving your bids and working together on this exciting project....

I'm looking for a professional who can assist with the implementation of a microgrid in an area I own. The purpose of this microgrid is to provide electricity during power outages and reduce reliance on...outages and reduce reliance on the main power grid. I would like the freelancer to: - Work on designing and implementing the microgrid itself - Ensure the system is effective in providing power during outages - Integrate renewable energy sources as part of this microgrid - Ideally, help in obtaining any necessary permits for the installation Experience in electrical engineering, renewable energy systems, and microgrid design would be highly beneficial. Prior work in residential or commercial areas would also be a plus. Please do reach out if you are confident in handling ...

I am in need of a robust and efficient inventory management system made in Excel. This project requires: - Tracking of product quantities and managing stock levels to ensure seamless operation - Cataloguing of each product's relevant information including its name, SKU/Part number, quantity, ba...batch number and expiry date - Methods of updating system quantities should be manual entry and bar code scanning. Knowledge in these methods is required. Ideal candidates should have extensive experience in Excel and inventory management system creation, preferably with a sound understanding of retail or related sectors. They should also be adept at implementing bar code scanning into Excel systems. Sharp attention to detail and ability to optimize for efficiency and usability is ...

I'm looking for a developer who can work on integrating Dynamics 365 (D365) with various systems through the creation of API endpoints. Key Requirements: - Development of API endpoints: You will be responsible for creating API endpoints to connect D365 with other systems, facilitating data exchange and updates. - Master File Updates: The primary objective of this integration is to allow for seamless updates of master files. While the specific types of master files weren't mentioned, the ideal candidate would have experience in updating customer, product, and supplier details in D365. - System Integration: You will be connecting D365 with other systems, with a particular emphasis on CRM, ERP, and e-commerce platforms. Ideal Skills: - Proficiency in D365: E...

I'm looking for a professional ...basic background check for pre-employment screening in Yaounde, Cameroon. The results of this check should be compiled into a comprehensive written report for my review. Key requirements: - Basic background check - Compile results into a written report - Conduct the vetting process in Yaounde, Cameroon Ideal candidates for this project should have demonstrable experience in conducting background checks, particularly in the context of pre-employment screening. It's important that the freelancer has the ability to operate in Yaounde for the vetting process itself. Additionally, the freelancer should have a record of delivering clear and concise written reports. Please provide an overview of your relevant experience and app...

...handle email correspondence, ensuring timely and accurate responses and flagging important messages that require executive attention. -Handle confidential information with integrity and discretion. - Respond to slack / whatsapp messages -Occasionally respond to a message during out of hours, though this is rarely required. Required Skills and Qualifications: -Exceptional command of English, both written and spoken. -Outstanding organizational skills and a keen attention to detail. Highly accurate. -Proven ability in managing calendars across multiple time zones and coordinating complex schedules. -Proven track record as an executive assistant; strong references required. -Love for assistant work and a dedication to the administrative profession. -Ability to work independently an...

I'm in need of an experienced content writer who possesses vast knowledge about technology. The project requires the creation of engaging written content that is both informative and easy to understand. Ideal Skills: - Proficient in English - Knowledgeable about tech-related topics - Experience writing high-quality content Job Description: - Developing engaging content revolving around the technology sector - Understanding complex tech terminologies and translating them into simpler concepts for the average reader - Ensuring all content is factual, well-researched and meets the highest standards in terms of language and clarity I look forward to collaborating with someone who can help me communicate my tech ideas effectively. If you're a savvy tech writer, I'd be...

I'm in need of a skilled copywriter to assist with my project. The writing will target a primarily technical audience. Your tasks will involve creating engaging, persuasive and clear copy that appeals to the technical audienc...copywriter to assist with my project. The writing will target a primarily technical audience. Your tasks will involve creating engaging, persuasive and clear copy that appeals to the technical audience. This project is focused on writing. Key requirements: - Copywriting expertise, ideally with experience in technical writing - Ability to tailor language to suit a technical audience - Strong written communication skills - Previous work or understanding of SEO is a plus Looking forward to receiving bids from talented copywriters with a knack for tec...

fixed price, not for profit, We work in real time via screen share. - Predefined donation amount...should be user-friendly yet effective in preventing spam and bot activity. or recaptcha3 As for the payment gateway, I am specifically looking for Moneris integration. It's crucial that the forms and transactions are secure and reliable. Ideal skills and experience: - Proficiency in web development, particularly creating donation pages and integrating payment gateways. - Familiarity with captcha systems, particularly image-based ones. - Experience in Moneris integration is a major plus. Please provide examples of your previous work in this area when you apply. Looking forward to working with you. NO BS. We work fast in real time together and get you paid and our site fu...

Following are the requirements of task to be fulfilled. 1- Task is to visit the Gott...the requirements of task to be fulfilled. 1- Task is to visit the Gottingen physically and Take 5 to 6 geotagged photos of with name board captured and from outside the building. 2- Get the verification form filled, signed and stamped by the HR and also stamp the certificate. 3- Get the details of verifier, Name, Designation, Department and Contact. 4- In case of refusal to fill form, take the written refusal with stamp or sign as a proof. 5- If companydoes not found on given address than take the 7 to 8 geotagged photos of exact address with right left name boards photos and make a small few seconds video of address . Also get the details of any nearby business ( Name of person, Business name a...

I have a script written in AHK for Windows. I would like this script to be rewritten for MacOS using Python. In order to ensure that the MacOS script is as close as possible to the original Windows script, the sound functionalities need to be replicated exactly. doesnt have to be python if u know something easier and simpler to maintain i dont care Key Skills Needed: - Proficiency in Python - Experience with MacOS scripting - Understanding of AHK (previous experience with this language would be beneficial) - Proficient in sound control within scripting The ideal candidate for this role would be someone who has a good understanding of AHK and Python, and is able to adapt the sound functionality of the AHK script to MacOS, while keeping the original features and functions of the s...

I'm seeking qualified expertise for dealing with auto electrical systems specific to AHS trucks. Responsibilities: • Diagnosis and repair of system problems • Installation of new components • Upgrading the existing electrical system The ideal freelancer will have extensive experience in auto electrical systems, particularly as applied to trucks. Familiarity with advanced diagnostic tools and equipment is a must-have. Please, share your similar past projects, skills, and applicable qualifications.

...real-time data processing. - Handling high volume of TCP connections efficiently. - Proficient socket management. - Ensuring the stability and reliability of the system under high data volume processing. Ideal Skills and Experience: - Expert level of experience with Java Netty framework. - Proven track record in handling high volume TCP connections. - Previous experience in real-time data processing systems. - Strong understanding of socket management. - Ability to optimize system performance and reliability under high volume data processing. Your understanding and experience with Java Netty framework, coupled with your expertise in high volume TCP connections and socket management, will be critical in the successful implementation of this project. Please only apply if you have...

I am looking for a skilled writer to help create an engaging and informative ebook focused on the topic of Mental Health as part of a broader Health and Wellness series. Your main tasks will involve: - Researching material related to the chosen topic, in this case, Mental Health. - Craft written content that can be easily understood by the general public who may have only basic knowledge on the subject. The ideal freelancer for this job will have: - Excellent written communication skills. - A proven track record in writing Health and Wellness related materials, ideally on the subject of Mental Health. - An ability to create engaging and easy-to-understand content from potentially complex information. The end result should be an informative and engaging ebook that educa...

...existing databases and systems. Create a secure authentication system for users accessing the platform. Test the system thoroughly to identify and fix any bugs or issues. Provide documentation and training materials for administrators on how to use the new features. Requirements: Proven experience in web development using Laravel framework. Proficiency in MySQL database management. Familiarity with Firebase for real-time database and messaging services. Strong understanding of API integration and RESTful principles. Ability to create responsive and user-friendly frontend interfaces. Excellent problem-solving skills and attention to detail. Effective communication skills and ability to work independently. Preferred Qualifications: Prior experience with school management syste...

...existing databases and systems. Create a secure authentication system for users accessing the platform. Test the system thoroughly to identify and fix any bugs or issues. Provide documentation and training materials for administrators on how to use the new features. Requirements: Proven experience in web development using Laravel framework. Proficiency in MySQL database management. Familiarity with Firebase for real-time database and messaging services. Strong understanding of API integration and RESTful principles. Ability to create responsive and user-friendly frontend interfaces. Excellent problem-solving skills and attention to detail. Effective communication skills and ability to work independently. Preferred Qualifications: Prior experience with school management syste...

I'm looking for an experienced website developer to create an online store for an unspecified range of products. Key functionalities required include: - A reliable payment gateway to facilitate customer purchases. The professional handling this project should be proficient in integrating proven and secure payment systems for smooth transactions. Considering the client might not have disclosed what products will be sold, skills in setting up versatile eCommerce platforms will be beneficial. Also, the developer should be flexible to incorporate additional functionalities such as customer reviews, product recommendations or inventory management if required later. QR Code integration

...compatibility across all devices and platforms. Visitors should easily find the information they need and be encouraged to take the desired actions, such as contacting us for more information or requesting a quote. Integration of Contact Channels: Contact information, including email, phone, and possibly live chat support, should be readily accessible throughout the website. Integration with CRM systems or lead capture forms may also be required to effectively manage inquiries and leads. Compliance and Security: The website should adhere to best practices for web development, including compliance with relevant regulations such as GDPR. Security measures should be implemented to safeguard user data and maintain the integrity of the site. Deliverables: Fully functional and visuall...

I'm in need of an experienced Flutter Developer who can craft a comprehensive mobile application. The app should be compatible with both Android and iOS systems. Requirements: - Develop a logistics and delivery app: The project focuses on creating a comprehensive software that can manage delivery services. It should include features such as route optimization, real-time tracking, delivery scheduling, and scanning capabilities. Skills & Experience: - Proficiency in Flutter: The candidate should be well-versed in Flutter development to ensure a seamless and efficient app. - Previous Experience: An ideal candidate should have a strong track record of developing similar applications. - Strong understanding of logistics: Knowledge of logistics and delivery processes is a plus ...

I am looking for some freelance engineers to undertake drainage design work for projects based in the U.K (England principally). This work can be done remotely. This would involve the use of Causeway Flow+ design software (which I can provide some training with) and a CAD package. I am a...freelance flood risk and drainage engineer based in England and sometimes have more work than I can handle. I am looking for some contacts with whom I can share work when required. Any experience of working in the U.K would be beneficial (but not essential). The work typically involves designing outline and detailed surface water (stormwater) drainage systems for new developments (residential, commercial, industrial). Sometimes foul water systems are required too. Thanks for y...

I'm seeking a proficient developer to build a comprehensive demo or starter code integrating Snowflake and Kafka using AWS cloud. The ideal candidate should have deep understanding of concepts such as: - Data ingestion - Data transformation - Data storage and retrieval The code should ensure: - Optimal performance - Scalability - Security The code can be written in Python or Java. In-depth knowledge of these languages, as well as experience with Snowflake and Kafka integration, is a necessity for a successful bid on this project.

I have an immediate need for professionals experienced in pre-employment vetting, specifically focusing on qualification verification. While the specific qualifications to be verified have not been highlighted, having a solid background in vet...solid background in vetting diverse forms of qualifications will be beneficial. Being knowledgeable in South Africa's education and professional qualification frameworks will also be a huge plus. Key requirements: - Experience in pre-employment vetting - Expertise in qualification verification - Familiarity with South African qualification systems - Ability to deliver results ASAP In depth understanding of both local and international education systems will give you an edge. If your skills align with these requirements, I loo...

I'm in search of a seasoned, skilled resume writer with a vast experience in the tech industry. The main goal is to craft a compelling resume that will impress companies, leading to job interviews. K...senior-level experience in resume writing, particularly in the technology sector. - Proven track record in securing job interviews for candidates. - Deep understanding of tech industry trends and requirements. - Excellent communication and collaboration skills, as you will need to work closely with me to understand my unique background and experiences. Please provide examples of previous resumes you've written, specifically for technology professionals. The ideal candidate will be able to translate my career achievements into a standout document that portrays my value to ...

I'm looking for a skilled designer who can create a service manual for my customers. First part is General Operations Manual. Second part is Service & Maintenance Schedule. All content written content will be forwarded with images also available. Design for Print - A5 Landscape. The manual should be visually engaging, easy to navigate and understand.

I am seeking a professional specialized in embedded systems to help program an embedded camera with the goal of achieving successful recording. Flexibility and adaptability are essential, as project requirements may evolve.

I'm looking for a talented developer to enhance an existing open-source project on GitHub. The project is a Proctoring AI located at this link: The enhancements I need revolve arou...Interface**: The revamped project should have an intuitive and engaging interface. This will help to enhance the user experience, making the proctoring tool more accessible and easier to use. Ideal Skills: - Proficient in Python and relevant libraries - Experience with AI and machine learning algorithms - UI/UX design and development skills - Familiarity with real-time systems and monitoring - Good understanding of academic proctoring systems If you have the necessary skills and experience to enhance this project, I'd love to discuss it further!

...possible and seek to start you as soon as possible (today if possible). Essential Skills & Requirements: - Cross-platform mobile app testing (Android, iOS) - Excellent understanding of functionality testing - Capacity to strictly follow provided test cases - Availability during daylight hours in Thailand. ----- Freelancer auto-wrote most of the above text. The below description is written by me, The CEO--- Mobile App QA Manual Testing (only DAYTIME only THAILAND) Seeking mobile application Quality Assurance and Testing Expert who can do DAYTIME testing inside Thailand. We are NOT seeking testers located outside Thailand. We are NOT seeking night time testers. Either Thai or English language speakers are ok. If you speak both that's a big bonus. You ...

...similar experience. 5+ years of SQL experience in SQL Server, MySQL, and Snowflake. 5+ years of C# and Java experience. 5+ years of experience with APIs (JSON, XML, SOAP, etc) 5+ years IDE experience with Microsoft Visual Studios, IntelliJ, or similar IDE 2+ years Jira experience Proven knowledge of building high-performing event-driven systems using SQL or NoSQL databases, Azure Functions, AWS Lambda Functions or similar technology. Excellent Verbal and Written communication skills. CI/CD Tools such as Jenkins and ADO Pipelines...

I require a proficient developer to integrate a UPI payment system into a mobile application. This UPI payment system will enable users to make payments only. Security is e...developer to integrate a UPI payment system into a mobile application. This UPI payment system will enable users to make payments only. Security is extremely important in this project; I will provide more details regarding the desired level of security during our discussions. Ideal Skills and Experience: - Proven experience in integrating UPI payment systems into mobile apps. - A solid understanding of mobile app development and UPI payment systems. - Strong focus on security in payments and app development. Please only bid if you possess the necessary skills and are open to discussing security requ...

...system that streamlines sales and communication with our customer base - WhatsApp Integration: An impressive system that sends and reacts to WhatsApp messages automatically - Email Automation: An efficient system that allows automatic replies, scheduled sending, and manages email campaigns This project demands a good understanding of Odoo and automation techniques, knowledge of WhatsApp and email systems, and a knack for simplifying complex workflows. The objective is to improve efficiency, communication, and customer interaction within the company. Upon customer sign-up, the system would trigger a series of communications via WhatsApp, SMS, and Email throughout their subscription period, including renewal reminders and campaign broadcasts. Welcome communication (Email and Wha...

I'm seeking a versatile Mobile App developer, ideally fluent in developing for both iOS and Android systems. This app should serve to provide a high-end shopping experience for our existing E-commerce business, which primarily involves selling products. The app development must include the following features: - A comprehensive product catalog. - User account creation and login features. - A secured payment gateway integration. - Seller profile creation and management. An excellent grasp on user interface design and prior experience in E-commerce app development will be crucial for this project. The end result should be an app that not only promotes our brand but serves as an efficient medium for selling our products.

I'm in need of a skilled professional to crea...Consultation of the user profile: The chatbot must respond to the contracted profile. - Spanish Support: The chatbot needs to be capable of interacting with users in spanish - Company Management: The ability to enable, disable, or delete companies from using the chatbot should also be integrated. Ideal Skills: - Proficiency in chatbot development. - Experience with integration with Mikrowisp or similar systems. - Proficiency in backend system development for user management. - Strong attention to detail to ensure smooth user experience. I'm looking for a professional who can deliver a high-quality, user-friendly chatbot that seamlessly integrates with Mikrowisp. Feel free to reach out if you have any questions or need add...

I have a mobile application's source code, written in PHP, that I need converted into an APK file with necessary settings. Key Requirements: - Convert PHP source code to an Android-compatible APK file - Implement necessary settings for the app to function properly on Android devices Ideal Freelancer: - Proficient in PHP and Android app development - Experienced in converting PHP applications to Android APKs - Has a good understanding of Android-specific settings and configurations