Barrier matlab binomial tree jobs

I am looking for assistance in optimizing battery performance through Matlab simulation. Due to the project specifics not being clarified, the professional should be comfortable and experienced in working with a range of battery types such as Lithium-ion, Lead-acid battery and Nickel-metal hydride batteries. Key points to consider for this project: Skills and Experience • Understanding and experience in working with various battery types • Proficiency in Matlab for creating simulations and testing • Strong analytical modeling skills Project Objectives • Provide research and suggestions on optimizing battery life, decreasing charging time and improving power output. • Develop a comprehensive Matlab model suitable for varie...

...designing point to point communication systems like simplex, duplex, using radio as the communication type. To see this project to its fruition, I will need a professional who can design a communication link with various parameters. Thereafter, we'll need to carry out Link-level modeling and simulations in Matlab. The ideal candidate should: - Have a solid understanding of point to point communication systems, specifically both simplex and duplex systems. - Be proficient in using MATLAB for simulations. Following the simulation, we'll analyze the performance of our designed system using several metrics. For the simplex system, we would be interested in assessing its: - Error performance - Power efficiency - Bandwidth efficiency - Implementation complexity - ...

Please Sign Up or Login to see details.

...and N2. This comprehensive investigation can be based on specific equations, data, and parameters that will be provided from a relevant paper. Duties and Responsibilities: - Understand the Base Model: Analyze the experimental study to grasp foundational models and calculations. - Industrial Sensitivity Analysis: Utilize any effective method to scale up these findings to industrial levels. - Use MATLAB, Excel, or any other tool to conduct a detailed sensitivity analysis based on the equations given - Document each step of the analysis clearly, ensuring that any reader can follow the process and results seamlessly. Ideal Skills and Experience: - Proven experience in sensitivity analysis. - Strong understanding of Pressure Swing Adsorption processes. - Ability to interpret and im...

Embedded Linux Engineer to assist in the creation of a kernel device tree for a custom board. You must expertise in embedded systems development, particularly in configuring and customizing Linux kernels and creating device trees. Please explain your relevant experience for this task in few sentences in your application.

I'm seeking a skilled microcontroller programmer for translating our control strategy into a code compatible with a dsPIC microcontroller. This code should be able to handle inputs of both voltage and current. The key features of...code, you should provide thoughtful documentation and comments so we can understand your strategies and algorithms. I am not specific about setpoints for voltage and current, so the approach should be adaptable. Ideal freelancers should possess the following skills and experience: - Strong understanding of PI control strategies - Fluency in microcontroller programming - Ability to translate MATLAB code into different languages - Problem-solving mindset to adapt to shifting parameters In your bid, please share relevant experience relating to thes...

I'm looking for a talented mobile app developer to create a comprehensive family tree mobile application. The app should be available on both iOS and Android platforms. The primary goal of the app is to enhance family communication and organization, so it will feature several key functionalities, including: - User registration and login - Family tree visualization - Photo upload and tagging - Entering details for individuals by Admin or other users with approval from Admin - Family News - Family Calendar - Admin Notifications and user notifications - Family Board data with accomplishments The app should have an intuitive and user-friendly interface, making it easy for all family members to interact with. Experience in developing similar applications, particularly tho...

...excited to transform my residential garden into a private, serene outdoor living space. I envisage a fresh, revitalized scenery that incorporates distinct elements for functionality and aesthetics. • Creating Raised Beds: We require an expert who can strategically place raised beds for optimal growing conditions and visual appeal. Skill in soil and plant selection would be advantageous. We • Tree Planting: I am planning to have 2 trees planted. Your input on species selection and placement for the best outcome given local climate and soil conditions is needed. • Race Jacuzzi Terrace: In addition to the serene greenery, a race jacuzzi terrace will give the perfect touch to my outdoor living space. Experience with integrating such features into a landscape is pre...

I'm in need of a modern-style logo for my carpentry and kitchen business main: RONI KITCHENS . Th...of a modern-style logo for my carpentry and kitchen business main: RONI KITCHENS . The ideal candidate will be able to create a design that is both professional and visually appealing. Requirements: - A design that is modern, simple and uncluttered - Limited to neutral colors such as black, white and grey - Suitable for both online and print usage - Try to add an element that illustrates a cedar tree Ideal Skills: - Proficiency in graphic design - Experience in creating logos for businesses - Ability to deliver a design that is both modern and professional. If you have experience in this area and think you can deliver a logo that meets these requirements, please don't he...

I need a proficient Matlab coder to assist with debugging my existing Matlab code which is currently undergoing some issues. Here's what needs to be accomplished: - Debugging: The code needs to be thoroughly examined for bugs and the cause of the malfunctions need to be rectified. - Adding New Functionality: Progressive functions need to be infused into the existing code to improve its overall productivity. - Optimization: In order to expedite the execution process, the overall performance of the code needs to be enhanced. The ideal candidate should not only possess substantial experience in Matlab coding, but must also be dexterous in debugging and optimizing for performance improvement. Prior experience in adding new functionalities will be highly advantageous...

Need a company logo. Company name = UNITED TREE CARE want olive branch vector UNITED TREE CARE Blue color code = 3595F8 Please see attached mock up example.

I'm looking for a proficient Matlab programmer with expertise in chemical engineering simulations to develop a comprehensive model for a Plug Flow Reactor (PFR). My goal is to analyze the conversion of reactants, product yield, and overall reactor efficiency, focusing on temperature and pressure as critical parameters. Key Project Deliverables: - Establish the PFR model in Matlab. - Integrate temperature and pressure variables using 2-D pseudo homogeneous model. - Calculate reactant conversion, yield, and efficiency. Ideal Candidate: - Proficient in Matlab coding. - Solid background in chemical engineering, specifically reactor design and modeling. - Understanding of PFR kinetics and mass-energy balances. - Ability to interpret simulation results for optimizati...

...must be IP-block tolerant, meaning if the scraper gets blocked, execution can be continued from the point where the last row of data was successfully extracted. Scraper Functions Function: list_category_tree Input: competitor_name(astro | sayurbox | segari), existing_csv (optional - CSV file to append to for continuing execution, if the scraper stopped or got IP blocked) Output: CSV of category tree with the following columns (scrape_date, URL, category name, position index, parent_category (null if top level)) Function: extract_sku Input: competitor_name, location (autocomplete place from google maps API), category (optional - extract SKUs from all categories if null), sub_category (optional - extract all SKUs from all subcategories if null), existing_csv (optional - CSV fi...

I need a proficient Matlab Simulink professional to simulate the current production in a semi-truck's solid oxide fuel cell. This should take into account multiple variables, specifically: - Temperature - Pressure - Fuel flow rate These should be varied at high levels in the simulation. With a requirement for medium precision, the model should sufficiently represent the real-world scenario without too much granularity. The goal is to understand how these variables affect the current production. The ideal candidate should have a strong background in thermodynamics, system simulations, and Matlab Simulink. Experience in solid oxide fuel cells and vehicular simulations would be a significant advantage.

I need a marine expert to guide me through understanding the wind impact on a plastic barrier in a saltwater environment. The deliverable of this project is a proposal for the appropriate anchoring solution for this barrier. Key Requirements: - Understanding of wind impact on marine structures - Familiarity with anchoring solutions for marine barriers - Experience with plastic materials in saltwater environments Ideal skills and experience: - Marine engineering or a related field - Experience in working with barriers or similar marine structures - Familiarity with the behavior of plastic materials in saltwater - Previous projects involving wind impact assessment Your proposals should outline your experience in similar projects and how you would approach this task.

I'm seeking an experienced MATLAB expert to assist in developing a strategic plan for optimizing battery usage. This project involves creating a comprehensive, data-driven strategy to maximize the performance of a battery system while extending its lifespan. Key Responsibilities: - Assist in identifying the primary goal of the battery usage strategy (maximizing battery life, maximizing performance, or finding a balance between the two) - Utilizing MATLAB to analyze historical data, develop mathematical models, and simulate various scenarios to determine the most effective battery usage strategy - Collaborating with me to understand the specific device or system the battery is being used for, and tailor the strategy accordingly - Providing an actionable, detailed plan fo...

... Key Requirements: - Style: The logo should exude calm and relaxation with a modern sophistication, reflecting a more high-end look and feel for the resort we want to become. - Design: A blend of text and icon elements may be desired to create a memorable and versatile logo but happy to see text only options as well. We are going with a more natural colour palate and our main pool and pandanus tree are 2 key icons of the resort. - Timing: Urgency is a priority, so the ability to deliver a top-notch design promptly is crucial. Ideal Skills and Experience: - Proven experience in creating elegant and sophisticated logos. - Proficiency in both text and icon-based logo design. - Ability to deliver quality work promptly, adhering to tight deadlines. - Strong understanding of branding...

Please Sign Up or Login to see details.

I'm looking for an expert specialized in Computer Science (CS), Electrical Engineering (EE) and Mechanical Engineering (ME) to assist me with academic projects particularly focused on Power Systems with e...Electrical Engineering (EE) and Mechanical Engineering (ME) to assist me with academic projects particularly focused on Power Systems with emphasis on Renewable Energy Integration. This will require: - Profound knowledge of Computer Science, Electrical and Mechanical Engineering concepts - Expertise in dealing with Power Systems, specifically Renewable Energy Integration into Power Systems - Tools Matlab, Python - Algorithms development Expect your assistance to be comprehensive, covering all bases to ensure outstanding outcomes. Your bid should demonstrate your expertise ...

I need a skilled graphic designer to create a logo for my ...in two ways. Logo as one COMPLETE image (Name and Image together) Logo SEPARATED into two files (one file for the name “THE NORTH STORAGE” with all formats and a second file with only the image "TREE" with all the formats) -The Complete Logo (jpeg) -The Complete Logo (Png) -The Complete Logo (Pdf) -The Complete Logo (Vector) -The Separated Logo Name (jpeg) -The Separated Logo Name (PNG) -The Separated Logo Name (Pdf) -The Separated Logo Name (Vector) -The Separated Logo Tree (Jpeg) -The Separated Logo Tree (PNG) -The Separated Logo Tree (Pdf) -The Separated Logo Tree (Vector) -The Separated Logo Tree (Favicon) ********** ALL LOGO FILES MUST BE HIGH QUALITY RESOLUTI...

I'm in need of a professional Photoshop artist to create a realistic montage for a house project. I need 2 images. 1. I need an image of the existing house to be remove and replace by grass. You have the picture of the front of the house and the picture of the tree behind. It doesn't need to be perfect, just give a good idea of the spot without the house. 2. A picture of the new house (the outline only) on the spot where it will be constructed with a path leading to it. Again, just to give an idea. The new spot is behind the trampoline. Let me know if you need more images. I need it ASAP. Thanks !

I'm in need of a talented banner designer who can create a personalized and illustrative banner for my social media platforms, particularly YouTube and Twitch. Requirements: -I would like that background, with that tree behind me. and three of those E in the sky has a cloud. also, i want a Nintendo switch to be hanging from one of the branches. - Personalization: The banner should reflect my personality and brand. - Style: I'm particularly interested in an illustrative style for the design. - Colors/Themes: I have specific colors and themes in mind for the design. Ideal Skills & Experience: - Graphic Design: Proficiency in creating custom graphic designs, particularly banners for social media. - Illustration: Strong skills in creating illustrations, especially for d...

...life. Compass or map: Signifying the journey of life and the importance of exploring and experiencing it. Heartbeat line or EKG rhythm: Reminds us of the vitality and pulse of life. Integration of Both Concepts: Dual-faced mask: One side represents life, the other death, showing the dual nature of existence. Combination of a blooming and withering tree: Illustrating the continuous cycle of life and death. I like the direction of these ideas. A tree in the middle with a Grim Reaper, Crow/Raven, and Veiled Skull of some sort on one side, and symbols of life on the other side. It should be memento mori vs memento vivere. Fading from one to the other across the image This would be stretching across my back so the separation of the two sides would be ideal. Start your prop...

I'm looking for a designer who can...life. Compass or map: Signifying the journey of life and the importance of exploring and experiencing it. Heartbeat line or EKG rhythm: Reminds us of the vitality and pulse of life. Integration of Both Concepts: Dual-faced mask: One side represents life, the other death, showing the dual nature of existence. Combination of a blooming and withering tree: Illustrating the continuous cycle of life and death. I like the direction of these ideas. A tree in the middle with a Grim Reaper, Crow/Raven, and Veiled Skull of some sort on one side, and symbols of life on the other side. It should be memento mori vs memento vivere. Fading from one to the other across the image This would be stretching across my back so the separation of the two...

I'm looking for an experienced developer who can take a code base and dataset I provide, construct an Abstract Syntax Tree (AST) based on them, and then create an Autoencoder using TensorFlow to compress the resulting AST for a classification problem. Key requirements for this project include: - Proficiency in Python: You will be working with a Python code base and dataset. Familiarity with Python is essential for this project. - Understanding of AST: You should be able to construct an AST tree based on the provided dataset and code base. - TensorFlow Experience: I would like the Autoencoder to be developed using TensorFlow, so prior experience with this framework is a must. - Output format: The desired output format for the Autoencoder is JSON, so you should be comfo...

I'm currently dealing with various implementation issues on my AEM website. The primary concern revolves around the incorrect integration of Adobe Analytics and Adobe Launch. The data not being tracked appropriately and some features aren't working as intended, creating a barrier in the website operations. Your role would be to diagnose the cause of these errors and rectify them. This would entail scrutinizing the system for technical fails, error codes, and implementation breakdowns. Relevant skills and experience: • Proven proficiency with Adobe Analytics and Adobe Launch • Understanding of AEM website operations • Ability to diagnose and resolve integration issues • Extensive experience in dealing with implementation errors Note: You will be gui...

As the final step to my graduation, I am seeking a frontend developer who is expert in using the react.js, and CSS Tailwind frameworks. The project is hosted on GitHub which you can find more details on the link...design and interactive UIs, especially within the educational domain. Please share your experience and any similar previous projects you've worked on. Your application will not just be assessed based on your experience level but also on how relevant your previous work is to my project. I look forward to your detailed project proposal. Here's the GitHub link: Here's a Figma design link for the project: 's

Matlab Simulation Battery Optimization Urgent Work

...symbols of wind, solar, and biomass energy in a cohesive design representing the variety of renewable resources. 6. Minimalist Initials: Design a minimalist logo using the initials "R" and "S" of REFOSYN creatively, with a scientific touch. 7. Transformation and Growth: Depict the concept of transformation and growth using dynamic and progressive shapes in the logo design. 8. Energy Tree: Create a stylized tree incorporating elements of renewable energy in its branches, symbolizing sustainable growth. 9. Energy Waves: Use wavy lines to represent energy waves in a modern and elegant design. 10. Sustainable Urban Landscape: Integrate elements of a sustainable urban landscape, such as eco-friendly buildings or solar parks, into the logo design. 11. Transfo...

I am an individual based in Guwahati, Assam, India, who is scouting for a proficient Flutter Developer. The preference is towards someone with remarkable skills in UI design, state management, and Firebase integration....crucial to this role. Consideration will give to those who possess: - Superior skills in UI design - Proficiency in State management - Expertise in integrating Firebase - Proven experience in Flutter Android Development - Ability to integrate Google Auth - Unmatched dedication to delivering quality work. For the successful candidate, there's the potential for ongoing work. Your location is not a barrier; however, applicants from Guwahati, Assam, India will be at an advantage. Please apply if you fit the above requirements to prevent your application from be...

...an existing Matlab project related to image processing. An issue has arisen with the code failing to read images as expected. The task will involve you looking inside the mechanics of the current program, identifying the source of the image reading problem and then rectifying it. The work doesn't end with just repairing the code; measures should be taken to ensure this error doesn't recur in any possible future scenarios. I am looking for someone with: - Proficiency in Matlab image processing toolbox. - Strong skills in Matlab debugging. - Experience in identifying and fixing the root causes of scripting errors. - An ability to work efficiently and quickly. Additionally, it would be beneficial if you have: - Prior experience troubleshooting 'Image...

I require a professional landscaper capable of tree trimming and restoring a small yard (less than 500 square feet). My garden currently is overrun with weeds and needs topsoil removal to restore its health. The task includes: - Trimming trees and removing topsoil with weeds - Restoring the lawn to a healthy state There are no specific plants or trees to preserve during restoration. Preferred experience of the freelancer: - Knowing how to use landscaping tools efficiently - Hands-on experience with lawn restoration - Ability to dispose of removed debris responsibly.

MATLAB USERS Visual Processing and Object Detection: The first task will be to detect and segment objects in images using traditional computer vision methods. It will be necessary to automatically separate the balls from the background and evaluate the accuracy of the segmentation. Feature Calculation: The second task will be to extract texture and shape features. By using appropriate algorithms to calculate the shape attributes of the balls, it will then obtain textural attributes with gray level collaborative matrices. Object Tracking: The third and final task will be to track the movement of a ball by applying a Kalman filter. Working with real and noisy coordinates, it will create a tracking algorithm and compare the tracked path with the real one. summarize this in 250 words

...The hat should have a deep swamp green color, incorporating textures and elements that resemble a dense swamp environment, such as moss, wet leaves, and cypress tree stumps. The curved brim should appear slightly ragged, emulating wear from a swampy area. Text Embroidery: The text "Swamp Stank" should be featured prominently on the front of the hat. The embroidery should use a bold, raised, moss-like textured thread. The font should mimic irregular, organic shapes, similar to tangled roots or vines, to integrate seamlessly with the swamp theme. Additional Design Elements: Include detailed embroidery of swamp flora, cypress tree stumps, and other relevant features around the text. The design should have a 3D appearance, with a focus on texture and depth to enh...

...icons to mention: COD, Shipping partner, Handcrafted with love, Returns and Replace policy - We need to have a collections page, that lists all products under that collection - The rest of the marketplace will be pretty standard - Our header and menu navbar are going to be separate for all pages. The header is supposed to be a branch of a tree with the sitelogo on it in the middle. - On a desktop view we want the left side of the screen to have a tree trunk run along on the left till the footer And leaves on the right. - Footer content should include: Column 1: Small kalataru logo and under it social media links Column 2: About us Contact us Careers Kalataru Magazine Column 3: FAQs Returns and exchanges Shipping and Handling Terms of Service Privacy Policy Column 4: Sign...

Need to extract data from website: , into an Excel file. Specifically name, discipline (medical practitioner, midwife, nurse, OT, physio, psychologist, podiatrist), location (incl suburb and postcode), initial registration date, registration expiry. There would be at least 100,000 rows of data. Only barrier, is this data is not able to be 'searched' efficiently. Individual names can be looked up. Or disciplines with a select number of names demonstrated...but I can't find a way to show ALL clinicians at once. Looking for a solution which can reliably pull all the names from the database.

I am in need of a designer who can recreate an artistic family tree in Illustrator. Here's what I require: - An aesthetic reflecting a vintage style. - You'll be working off a PNG/High Res tree that I'll provide. This has all the names already entered so working on it should be simple enough. - Given that I need this project completed ASAP, it's important that you're able to work quickly and efficiently without compromising in quality. Looking forward to your submissions.

...seeking a proficient freelancer to model a battery energy storage system using MATLAB/Simulink. The system is intended to serve as a backup power supply for a large industrial facility. Key Project Details: - Intended Use: The primary function of the battery energy storage system is to serve as a reliable backup power source. - Scale: I'm looking for a model that's specifically tailored for a large industrial facility. This involves understanding the energy consumption patterns of such an environment and designing a system that adequately meets the facility's energy needs during power outages. - Software Preference: Due to the complexity of the project, the ideal candidate should have a strong background in MATLAB/Simulink. This tool is essential for the ...

Hi, I have a completed MATLAB project that was done using functions that should not be used. Can you review it and rewrite it using the functions that I will provide you?

I'm in search of a MATLAB expert with a strong background in control engineering. Your main task will be debugging my current model predictive control code. Requirements: - Proven experience in MATLAB, especially in the context of control engineering. - Expertise in debugging code, particularly in fixing the issues related to code running and error messages. - Ability to work independently and efficiently. Your proposal should include: - Relevant past work in MATLAB, particularly in control engineering. - Details on how you usually debug code and your approach to dealing with issues. - Your understanding of model predictive control and examples from your past work that demonstrate this. Your application will be a key part of my decision-making process.

I am in need of a skilled MATLAB developer with a background in control engineering or related fields. The project involves debugging my existing code on model predictive control. Key Responsibilities: - Collaborate with me using a collaborative coding platform to resolve the error messages and incorrect results in the code. - Ensure the code provides accurate predictions as expected. Ideal Freelancer: - Proficient in MATLAB with a strong understanding of model predictive control. - Experience with debugging complex mathematical algorithms. - Strong communication skills and a willingness to collaborate through a shared coding platform.

I'm looking for a skilled logo designer to evolve my current logo's graphics and ...The existing logo design is of an olive; I'd like it to be transitioned into an olive tree. While maintaining the design's integrity, I desire a color change as well, shifting it to black and white. I appreciate freelancers with a keen eye for color theory and logo transformations. Key requirements: - Expertise in logo alterations without losing original essence - Adequate experience with black and white image design - Strong skills in color theory, preference given to those with proficiency in transitioning colors - Ability to modify fonts and shapes of logos The final product should beautifully blend the original's features with the requested alterations, resulting in...

I'm looking for a skilled C++ software developer to create a software on a esp32 which talks to a nrf24 module. The Software parts can be taken from the Github directory: I need only the functionality which can be seen on the pictures in the code. All the web and network stuff can be ignored.

I'm looking for a MATLAB expert who will develop a simulation model for both Vehicle-to-Grid (V2G) and Grid-to-Vehicle (G2V) technologies. The core aspect of your work should emphasize on the scheduling of charging and discharging within the system. Key Tasks: - Simulate both V2G and G2V technologies accurately - Focus the simulation model primarily on scheduling of charging and discharge cycles - Ensure the model is flexible enough for future tweaks and adaptations Skills and Experience: - Proficient in MATLAB, especially signal processing module - Strong knowledge and experience in energy systems simulation - Good understanding of V2G and G2V technologies - Familiar with energy scheduling and management

...and the following slogan written at the bottom below the roots: “Perfect English. For everyone.” V2 Tree similar to attached Photo 2. But with these changes: the leaves will be more fat and lush and very densely populated like the leaves in attached Photo 3. And the roots will be thicker and more 3 dimensional like the roots in Photo 3. “EnglishTree” written under it and the slogan “Perfect English. For everyone.” written at the bottom. V3 Similar to attached Photo 4 with with the following written below it: “EnglishTree” and the following slogan written at the bottom: “Perfect English. For everyone.” V4 Similar tree shape as attached Photo 5 but the tree will be similar to Photo 2. The tree wil...

...issues in real-time as you browse. - Google Lighthouse: An automated tool by Google that generates reports on various aspects of website performance, including accessibility metrics. Creation of an In-depth Accessibility Checklist: ======================================== Develop a detailed checklist providing general guidelines for managers and developers to make their websites user-friendly and barrier-free. This checklist should cover: Navigation and content structure Requirements for simple language Specifications for forms that are not automatically checked by tools (e.g., valid form labels and descriptions, accessible error messages). Guidelines for creating accessible PDFs and other downloadable documents. .... Recommendations for Additional Tools: ======================...

need of a computer vision expert; proficiency in MATLAB is particularly essential. 1-Image Segmentation and Detection: To perform segmentation and detection of objects in images in accordance with the requirements of the given tasks, without using deep learning methods. Separation and detection of objects from the background using conventional computer vision techniques on images. 2-Feature Calculation: Extracting features from images of objects, especially calculating textural and shape features. Using appropriate algorithms to identify and extract image features. 3-Object Tracking: Development and implementation of Kalman filter or similar tracking algorithms. Using appropriate mathematical models and algorithms for tracking and predicting the movements of and verifying

I'm looking to develop a scheduling strategy that optimizes battery usage, with an aim to increase efficiency. While the specifics of the battery system haven't been provided, the freelancer should be prepared to create a ...for the project: - Development of a method to optimize battery usage for unknown battery systems. Experience in deterministic model formulation would be ideal. - Ability to incorporate constraints or limitations in the future. This could be the maximum battery capacity, available charging/discharging rates, time-of-use electricity rates, and renewable energy generation. If you have expertise in Matlab and experience in battery scheduling or similar projects, I invite you to place a bid. Please share relevant past projects or credentials that qualify ...

I'm looking for an experienced MATLAB-Simulink professional to help me simulate DC arc faults in PV system. Key Project Details: - The primary purpose of the PV system is power generation. - I need the simulation to provide details on basic electrical parameters and arc dynamics. - I need the simulation using different arc models (Cassie, Mayr, Habedank, Kema, Paukert, Modified Paukert, Heuristic). - The Pv system (20 kW) should be connected to the grid. - The Pv system should have a dc-dc converter and inverter. The ideal freelancer for this project should have: - Strong expertise in MATLAB - Simulink - Experience with simulating electrical systems - Familiarity with photovoltaic systems would be a plus