...preliminary a detailed and accurate site plan for approximately 20 residential lot development in Jacksonville, Florida. This project requires careful attention to lot sizes and dimensions, as well as adherence to Jacksonville's specific setbacks and zoning regulations. The design should also include necessary road access and infrastructure requirements. The ideal freelancer for this project would have experience in civil engineering or urban planning and have a deep understanding of Jacksonville's local zoning laws. Skills in CAD or other design software are a must. The site location is 3062 Sunnybrook Cr, Jacksonville, Fl 32254 the Lot has an area of 3.47 acres We can split the project in different phases. We need right now the
I'm seeking an experienced mechanical engineer with expertise in CAD to assist me in finalizing the final commercial design for the StarDrive Propulsion system which will be used in satellite station keeping applications. Comprehension of the design is a prerequisite, kindly inform yourself through and my YouTube channels, Dennis Plews and Dennis J. Plews. Tasks will include: - Familiarizing yourself with the existing design - Assisting in implementing specific mechanical components into the final design. Ideal candidate must have: - Proficiency in ANSYS level CAD. - Mechanical engineering experience and background. - Familiarity with integrating specific mechanical components. - Understanding of propulsion systems or similar technology wou...
We are seeking a California licensed geothermal engineer to conduct a peer review and certification of our ground source 126 ton thermal energy system. The engineer should possess extensive experience and expertise in geothermal engineering and be familiar with California state regulations and licensing requirements. The main responsibilities include reviewing the thermal energy system design, ensuring compliance with applicable codes and standards, and certifying its successful implementation. The ideal candidate should have excellent problem-solving skills, attention to detail, and the ability to produce accurate reports.
I am in need of a skilled engineer, with expertise in both Microsoft Power Automation and SharePoint. The main task will be the automation of email notifications. Ideal Skills: - Microsoft Power Automation - SharePoint - Experience in automating email notifications There's no rush on project completion, quality is key here and I'm flexible on the timeline. Please ensure you've the relevant experience before bidding.
I'm seeking a PCB engineer to conduct rigorous PCB fab house audits and internal engineering efforts. Your primary task will be conducting inspections in line with IPC standards and internal standards flown down to PCB fab houses. I have a 6 month contract (renewable) available for someone who can qualify PCB fab houses and intimately understand IPC 6012/6013. Must be a US citizen due to industry specific requirements. Here's what I need: - Thorough PCB house audits/ inspections as a supplier qualification - Uses IPC standards for defining discrepancies as found by an inspection team - Provide detailed inspection reports as needed Ideal Candidates: - Experience in PCB Quality Engineering - Familiarity with IPC standards - Has excellent attention to...
I am seeking a s...illustrator with a flair for AI style artistry. The project will involve creating captivating illustrations of mechanical animals, really playing with the concept of life and machinery. Details: - The art style should reflect a unique appreciation for AI aesthetics. - The main theme revolves around mechanical animals, incorporating realistic detail and abstract concepts. - The chosen medium for this project is digital illustration. Ideal Skills: - Proficiency in AI style digital illustration. - Experience in drawing mechanical themes. - A knack for combining realism and abstract elements effectively. If you can translate complex ideas into visually stunning digital art, I want to hear from you. This is...
I am looking for an engineering design of a retaining wall sketch to support a sloped area. Key requirements for this project: - Design a retaining wall with a height exceeding 6 feet. - The wall should be designed using concrete as the chosen material. - Your design must follow South Carolina's (SC) building regulations and standards. - You'll need to provide a digital sketch of the design that has been stamped as per SC regulations. Ideal Skills: - Extensive engineering background, specifically around large structural design. - Knowledge of SC building regulations and standards. - Expert in creating digital sketches. - Experience with concrete as a construction material. - Knowledge on designing retaining walls for sloped areas. ...
...animator skilled in creating high-detail mechanical animations using Blender. - Task: Your main task will be to animate a robot arm with vision sensors with high precision and realism. This task requires both creative and technical skills, as the animation needs to be intricately detailed yet smoothly executed. The robot arm will need to move, and the sensors will have to show their field of views (FOV). This will illustrate the fields of what our safety solution sees. - Experience: Ideally, you have a strong background in mechanical design or a related field. Prior experience in animating mechanical is preferred. - Skills: Proficiency in Blender is a must. Strong understanding of 3D modeling, rigging, texturing, lighting, and rendering to bring the mechanical...
**Freelance Opportunity: Cardboard Craft Project Designer** We are seeking a talented and creative freelance professional with a background in structural engineering, mechanical engineering, or arts & crafts to develop unique cardboard craft projects for children aged 5-10. The ideal candidate will have a passion for crafting, an innovative approach to design, and the technical skills to ensure projects are both engaging and structurally sound. Please see attached file to see what are the limitations. **Project Overview:** - **Craft Focus:** Create engaging and educational cardboard craft projects suitable for children aged 5-10. - **Design Constraints:** Crafts must be limited to using specific actions and techniques: cut, ...
I...structural engineer for a commercial Greenhouse project. The primary material being used for this project is steel. Currently, we have a the building which was previously built and now is disassembled ready to be erected again. We had a set of engineered drawings for it but they need to be stamped in order to proceed. Key Tasks: - Review drawings - make necessary changes to pass building codes The ideal candidate will have: - Proven experience with structural engineering for commercial buildings - Proficiency in working with steel as the primary building material - Ability to analyze and optimize structural designs - Strong attention to detail and commitment to safety - Good communication and collaboration skills to work with the d...
I'm starting a business that operates across the whole bamboo value chain - from plantation to furniture manufacture. I urgently need assistance from an industrial engineer with relevant experience and expertise. Key tasks include: - Designing efficient manufacturing processes - Sourcing cost-effective machinery - Improving production efficiency - Implementing quality c...Investigating global bamboo plantation land costs - Forecasting the number of employees required - Identifying potential suppliers or manufacturers I aim to sell my bamboo furniture products on an international scale, thus market understanding, strategic operation modeling and production efficiency are key to success. A deep knowledge of bamboo industry and previous experience in industrial engineering is hi...
Hello! I'm looking for a professional who can help me with production process documentation for our steel structure in a tight timeline. Workshop documentation must be prepared in the following standard: - Sheets on a separate sheet - Each sheet is in a separate file with the .dxf extension, drawn at a scale of 1:1 in such a way that the points do not overlap and there are no gaps (polyline) - H profiles, square tubes, rectangular pipes on a separate sheet I am sending the sample documentation and a sample drawing of a shipping detail in PDF. You'll be provided with the necessary project requirements and it will be your responsibility to translate these into comprehensive fabrication drawings. These drawings are crucial for the construction proces...
As the person who will be managing this project, I'm looking for a professional who can manage and support a small team to deliver a defense project of an IT software system to support their engineering and aftersales processes. Here's what is needed: - A keen understanding of user needs and expectations to meticulously improve engineering data and consumption downstream. This expectations involve tailoring to both aesthetic and functionality aspects for the customer. Ideal Skills and Experience: - Proven background in system design with a strong portfolio showcasing previous works. -Teamcenter and engineering data and Database solutions - Experience in user testing, user interface design, and usability testing. - Strong knowled...
I have 2 PDF survey drawings that I need to be converted into site cross-sections. Key Requirements: - Convert two PDF survey drawings into cross-sections. Additional Information: - The survey drawings are in PDF format. - The cross-sections will be used for construction planning, so they need to be accurate and detailed. Ideal Skills: - Proficient in using drafting software (e.g. AutoCAD, Revit). - Strong understanding of civil engineering and construction planning. - Previous experience working on similar projects.
I need a CV writer who can create a compelling and professional document for a job application within the Engineering sector. Emphasis should be on senior-level experience and achievements. Key Requirements: - Expertise in CV writing catered to the Engineering industry - Experience in positioning senior-level candidates - Understanding of current job market and employer expectations in the Engineering sector - Ability to highlight key skills, experiences, and achievements effectively The end product should be a tailor-made CV that presents me as a top contender for senior-level roles in the Engineering industry.
I need a CV writer who can create a compelling and professional document for a job application within the Engineering sector. Emphasis should be on senior-level experience and achievements. Key Requirements: - Expertise in CV writing catered to the Engineering industry - Experience in positioning senior-level candidates - Understanding of current job market and employer expectations in the Engineering sector - Ability to highlight key skills, experiences, and achievements effectively The end product should be a tailor-made CV that presents me as a top contender for senior-level roles in the Engineering industry.
I'm seeking a professionally skilled freelancer to assist with recording a pop single song. Your expertise in the industry will bring my song to life. • Essential Skills: - Solid experience in recording pop songs - Excellent technical knowledge in sound engineering - Proficiency in using recording software - Top-notch editing skills It will be of great advantage if you have prior successful projects in this field to showcase. Bear in mind that I am leaning towards a contemporary pop flavor, so relevant experience is necessary. For this gig, you'll be required to record, edit, and polish the song to perfection, keeping its pop essence alive. Impress me with your unique style and techniques. Let's create a pop masterpiece!
I am seeking an audio engineer expert to improve the quality of my podcast recording. The recording was done using podtrak 4 and rode wireless microphones, however, the output quality is not satisfactory with several issues needing ...constant echo is running throughout the recording. - Unclear voices: The speakers' voices are not clear enough. This might be a gain issue. The improvement on the audio quality needs to be made post-recording and not during the recording process. The final audio file after enhancement should be in MP3 format. Ideally, turn around in 24 hours Perfect candidate would be experienced in audio engineering, especially in dealing with similar podcast quality issues in the past. Familiarity with podtrak 4 and rode wireless microphones will be an a...
I am in need of a skilled AutoCAD professional to create 6 small, simple 2D diagrams, and 1 3D diagram. The drawings are for an engineering purpose and do not require any specific AutoCAD version. Key Requirements: - Create 6 small, simple 2D diagrams - Create 1 3D diagram - No specific AutoCAD version required Ideal Skills: - Proficiency in AutoCAD - Strong understanding of engineering diagrams - Ability to create 3D diagrams is a plus This is a straightforward task for an experienced AutoCAD professional. I look forward to seeing your bids.
Drawing SFD BMD Cross-section end analysis midsection analysis L/4 partial analysis Shear design Hook anchorage length an...write an explanation in English next to each expression. In other words, make it like Sample, but the structure I'm looking for is exactly what Sample 2 analyzes. However, my object of analysis here is a slightly different length of beam, so I need to write an expression to reflect the difference. 1. write an expression to reflect the difference in the length of the beams, using the sample as a guide 2. write an explanation in English next to each equation. (I need to explain this in front of many people, not just after I solve it, so please write an explanation or interpretation principle for each equation. You should analyze both for G3...
I'm searching for a professional with experience in regulatory compliance and a background in engineering, to help me with gaining a Professional Engineer (PE) Endorsement to meet legal requirements. I have a Signboard that weight 1720kg to install on I-Beam structure with concrete footing. I want to make sure it is safe and cost effective. Requirements: - Familiarity with PE Endorsement process - Proficiency in legal and regulatory compliance in engineering sector - Able to provide guidance and support towards gaining the PE Endorsement Your role will be instrumental in ensuring I meet the appropriate standards, fulfill requirements, and ultimately gain my PE Endorsement. Your expertise in this area will be highly valuable and will directly impact my profess...
Key Requirements: - Create corporate video with voice over for an engineering factory - Inputs will be provided in the form of images and short videos - Time span of the video will be around 3 minutes - Voice over is required Ideal Freelancer: - Experience in creating corporate videos, ideally with a technological or engineering focus. - Proficiency in video editing and animation software. - Strong skills in voice over and script writing. - Make videos using AI
...--------------------------------------- We are seeking an experienced mechanical engineer or a team of engineers to design a high-performance four-stroke engine for a model aircraft. The engine must meet the following specifications: Specifications: Engine Type: Four-stroke Displacement: 230cc Configuration: Twin-cylinder, boxer/flat engine Additional Feature: Integrated starter Responsibilities: Design and develop detailed engine drawings. Ensure the design is lightweight and suitable for a model aircraft. Integrate a reliable starting mechanism. Optimize the engine for efficiency and performance. Collaborate with our team on necessary modifications. Qualifications: Proven experience in engine design, especially for model aircraft or small engines...
I'm seeking an experienced professional who can analyze selected architectural and structural plan...viewpoints of fire safety regulations and accessibility standards, and provide concrete recommendations for improvements. Key Tasks: - Thorough scrutiny of existing plans with a keen eye for code compliance. - Special focus on exit routes, fire suppression systems, and handicap accessibility features. - Presentation of clear, actionable amendments to ensure compliance with laws. Ideal professionals should have a strong background in architecture, structural engineering, and a deep understanding of fire safety regulations and accessibility standards. Experience with plan analysis and code compliance is a must. Knowledgeable opinions and clear communication will b...
I'm seeking an experienced engineer to implement finite element analysis using ansys software. The engineer will perform structural analysis on...- Execute a structural analysis on a steel tank - Consider both static load and hydrostatic pressure loads in the analysis - Use ansys software for the simulation Ideal Skillset: - Extensive experience with structural analysis and finite element methods - Proficiency in using ansys software - Strong understanding of different load concepts: static and hydrostatic pressure loads - Familiarity with steel as a material for structural analysis You should be able to interpret the results of the analysis and provide suggestions based on the observations. This project is best suited for individuals who have a strong ba...
I'm seeking a skilled mechanical design engineer to provide the design for a high-capacity denest machine to be used specifically in the food industry. The designed machinery needs to be able to handle 1000+ trays per hour. Key requirements for the job include: - Profound experience in mechanical design, specifically for machinery used in the food industry. - Knowledge and understanding of denest machines and their operational mechanics not essential but beneficial - Proven track record in designing machinery that can perform at high capacity. - Familiarity with safety and hygiene standards in the food industry. - can produce 3D model and manufacturing drawings Your role will involve developing a comprehensive design which ensures the functiona...
I seek an experienced engineer equipped with both mechanical and aeronautical skills. The mission is to create a high-quality rendering for an octocopter drone, intending for agricultural chemical spraying tasks. Confidentiality is paramount so signing a Non-Disclosure Agreement (NDA) will be required. KEY DETAILS: - Purpose: Agriculture chemical spraying - Payload: Accommodate 250 lbs (not including drone weight) - Flight distance: Up to 5 miles Technical drawing skills, a solid understanding of drone aerodynamics, and experience in mechanical drone development will come in handy for this project. Reach out if you find this interesting and we can delve deeper into the specifications.
I'm looking for an expert who can efficiently calculate the surcharges on a retaining wall, which is intended to support a residential building. The terrain is straightforward, without any particular challenging aspects. Key responsibilities and qualifications include: Tasks: - Conduct stability analysis and design checks - Calculate surcharges based on building loads - Ensure retaining wall is adequate for loads and soil conditions Ideal Skills and Experience: - Civil or structural engineering background - Experience in retaining wall design and surcharge calculations - Understanding of soil pressure distribution - Familiarity with residential building requirements This is more than a project; it's about safely supporting a home. So, if you'v...
I'm seeking an experienced civil engineer who can design a site plan for a commercial construction project. I already possess the general layout of the 40x60 building structure, but I need detailed blueprints for drainage systems, landscaping, and utility positions as well. What You'll Do: - Design layout for commercial construction site - Develop detailed drainage system plan - Create a landscaping design in harmony with the site - Pinpoint utility positions Ideal Skills and Experience: - Civil Engineering/Construction background - Experience in drainage systems - Knowledge of landscaping design - Familiarity with utility positioning on commercial sites There's no rush on the delivery, quality is my utmost priority. Looking forward to ...
As a professional with a background in Mechanical Engineering and valid US registration, I am seeking assistance in reviewing and approving an ASTM testing standard for corrections locks. Your role is of utmost importance as it includes the validation of the test report using your official stamp after careful review. Brief requirements: 1. Registered US Mechanical Engineer 2. Proficient with ASTM testing standards 3. Able to review digital video footage Your expertise will be imperative in assessing and interpreting the digital video footage which documents the testing procedure. Detailed experience in the sector of lock mechanisms, especially corrections locks, is needed for comprehensive understanding and analysis. Please confirm you have...
I have a multi-story building project that requires an experienced structural engineer. Your primary task would be to evaluate the necessity of central RC columns in the building by checking the load distribution from the provided load calculation sheets. Key responsibilities: - Evaluate the need for central RC columns in a multi-story building - Thoroughly analyze the provided load calculation sheets for structural integrity - Provide alternative design solutions if necessary Ideal skills for this job would include: - Professional experience in structural engineering, especially for multi-story buildings - Expertise in evaluating load distribution and structural integrity - Ability to provide alternative design solutions based on your analysis ...
I'm looking for a highly skilled wastewater engineer to undertake a project focused on reducing environmental impact, particularly through enhanced pollution control. The crucial task is to devise efficient ways of controlling suspended solids pollutants in wastewater. Proven experience in: - Wastewater management - Pollution control - Reducing environmental impact - Handling of suspended solids pollutants This project needs innovative strategies and practical engineering solutions to control pollution effectively. We are keen on minimizing our eco footprint and this initiative is an integral part of that.
For school education videos, I'm seeking an experienced and creative cartoon animator to breathe life into my vision. Project Scope: - I have the characters, only animating cartoon characters is required - Creating less than 1 minute worth of animation - Utilizing a 2D animation style, use Adobe Aftereffects. Ideal Candidate: - A seasoned artist with a portfolio that showcases their mastery in 2D animation. - Outstanding in character creation and environmental design. - Ability to adhere to deadlines and work well under pressure. - Open to collaboration and feedback.
I'm in need of a mechanical drawing takeoff professional who can focus on the equipment layout assessment for an HVAC project. Key Tasks: - Provide detailed metal duct layout and takeoff - Detail dimensions and lengths of ductwork - Identify connection points and necessary fittings - Specify material and gauge requirements for the ductwork This project requires someone with a deep understanding of HVAC systems and experience with creating detailed equipment layouts. Your work will be critical in ensuring the efficient and cost-effective operation of the HVAC system.
I'm looking to have a structural diagram created for my composite deck. This project should include built-in seating capabilities within the design. The ideal candidate for this project should have experience with deck designs and be knowledgeable in creating functional, aesthetically pleasing deck spaces. Skills and experience ideally include, but are not limited to: - Architecture and Design - Structural Engineering - CAD expertise - Knowledge of composite deck materials and seating solutions Let's bring this outdoor oasis to life! Looking forward to your innovative deck designs!
...expert in structural engineering to undertake the design of my project's foundation and retaining walls. This design is crucial as these structures have several pivotal roles, including: - Acts as supports for the building - Mitigates soil erosion - Maximizes usable space The retaining walls' planned height and length are 5-10 feet, meaning your expertise must accommodate these dimensions. Concrete will be the principal material for these structures, so familiarity and experience working with concrete in structural engineering contexts are essentials. Ideal Skills: - Proficiency in structural engineering, specifically for buildings - Proven experience with designs for preventing soil erosion - Experience in optimizing space ...
I am in need of a skilled contractor can decompile Fermworks software, bypass, and integrate with working with the LabView 2019. Labview is activated already, Fermworks not, although not sure how well Labview is activated. The Unicorn 5.31 software is activated, but its not recognizing the machine, so need networking or driver f...sure how well Labview is activated. The Unicorn 5.31 software is activated, but its not recognizing the machine, so need networking or driver fix fir this. Key Requirements: *Experience in using a decompiler like x64dbg or similar tools. • Familiarity with desktop-based software. • Must be able to complete the process without the need for additional purchases. *Teamviewer, Anydesk connection Skills Required C Programming C++ Programming Rev...
I'm looking for a proficient structural engineer to create a unique design for a breakaway fence, manufactured from aluminum. The key specifics needed for this project include: - The fence's overall height should be 4 feet. - The breakaway feature needs to be advanced enough to collapse or break away when required, particularly in the case of flooding. Considering the technical aspects necessary in this design, you'll need tremendous skill and experience in aluminum structure design, engineering materials, and flood-responsive mechanisms. A proven track record in similar projects would be highly desirable. The design should be detailed, structural sound and functional in extreme weather conditions. Please only bid if you can deliver thes...
...trust, reliability, stoicism, power, sisu, professionalism and quality. I have in mind color schemes that either pairs black and gold together or combines blue, gray and white. The ideal freelancer for this job would be experienced in branding and potentially marketing, with a sophisticated understanding of color psychology and simplicity. I'm aiming for a logo that not only distinguishes our brand but also resonates with our audience on a deeper level. Connect with me if you're ready to create a memorable design that conveys trust and quality. The company is a one stop financial marketplace for all business funding needs. The company is called "Lendeavor" combination of the words Lend and Endeavor. We fund and finances small businesses. Our tar...
I am looking for an experienced engineer for an exciting venture involving the creation of automated platforms with a medium size between 1-2 meters. These platforms are expected to carry a weight of around 100kg and gently move at a slow pace of 1cm/sec along predefined paths, creating an ethereal and almost magical motion effect. Key aspects of the project include: - Designing the platforms to accommodate smooth indoor floors; these are the expected terrains where the platforms will be operating and the design should incorporate elements friendly to an indoor setting. - The platforms should be able to function through an electric power source. This means your experience in electrically powered machinery is a necessity. You should ideally possess a strong founda...
...in the field of electrical engineering to prepare, execute, and publish a research article in an Elsevier journal. Please note, the research itself has not been conducted yet, and this responsibility will be on your shoulders. Key Responsibilities: - Conducting thorough research in electrical engineering. - Drafting a high-quality research article following Elsevier's guidelines. - Publish the article in an appropriate Elsevier journal. Requirements: - Demonstrated experience in publishing research articles in Elsevier journals. - Strong educational and/or professional background in electrical engineering. - Ability to carry out comprehensive and valuable research independently. - Proficient in academic writing, particularly in the field of electrical engi...
...of a skilled project administrator with a solid understanding of Deltek Ajera. The main responsibilities for this role will revolve around supporting key financial functions and project setup. Key Responsibilities: - Monthly data entry support for accounts payable and accounts receivable - Proficiency in using Deltek Ajera for seamless setup of project tasks and projects Communication: I prefer to have updates on tasks communicated through project management software. Being able to track progress and have a clear overview of ongoing activities is crucial. Ideal Candidate: - Proficient in Deltek Ajera - Strong experience in data entry, particularly in accounts payable - Excellent project administration skills - Prov...
I'm looking for a Virtual Assistant to grab leads, I’ll send material on how. It’s pretty simple. We'll specifically be targeting those who work in the nightlife industry and going down the research rabbit hole on Instagram. Ultimately I'm trying to sell high end social media services and night life people have access to a wealthy Rolodex so my goal is to gain a bunch of affiliates from this. Key Responsibilities: - Find mini partners (affiliates) in nightlife: vip hosts, promoters, club managers club partner companies, etc. - Inputing the above prospects info (names and emails) on a google excel sheet Skills and Experience: - Fast - Critical Thinker - Proficiency in using Instagram for business research - Experience in lead generation - B...
I'm in need of a specialist to design a machine specifically for cutting hair. This isn't your run-of-the-mill task, some unique skills are necessary: - Experience with mechanical design, specifically machines for intricate tasks. - Understands the physics of hair and appropriate cutting methodologies. - Patience and the ability to iterate through designs as there is no immediate time constraint. Your creativity and expertise will be highly appreciated. Let's create a new and efficient hair cutting solution together.
I am looking for a cloud engineer who can assist with deploying an ASP.NET Web Form application on a Windows Server 2022 on VPS. Key Requirements: - The SQL Server DB and ASP.NET Forms have already been set up on the VPS Windows Server 2022. The main task is to ensure the successful deployment of the ASP.NET Web Form application. Additional Details: - The cloud provider I am currently using is WABYNE. Ideal Skills and Experience: - Proficiency in cloud engineering and deployment processes. - Experience with ASP.NET Web Form applications. - Familiarity with Windows Server 2022 on VPS. - Knowledge of SSL certificate installation, database configuration, and firewall settings is a plus. Please provide your relevant experience, certifications, and portfolio when applying. Y...
I'm in need of an Ansys expert who can help me simulate a mechanical component and analyze it for stress. The simulation is to be conducted under dynamic load conditions. Key Responsibilities: - Understand the product design and its intended usage. - Create a dynamic loading situation within Ansys. - Conduct a thorough stress analysis of the mechanical component. - Provide a detailed report on the simulation results. You should have: - Proficiency in Ansys, particularly in stress analysis. - Experience in working with mechanical components. - Understanding of dynamic load simulations. - Ability to interpret and present simulation results. Your work will be instrumental in helping us ensure the reliability and safety of our product.
I'm seeking a Queensland registered structural engineer to review and sign off on a completed FEA report for a residential building. Key Project Details: - This project is in the post-construction phase. - The purpose of the FEA report is structural analysis. - The structure in question is a residential building. Freelancer Requirements: - Must be a registered engineer in Queensland. - Proven experience in structural engineering. - Familiarity with FEA analysis is a plus. Please don't bid if you are not registered as a structural engineer in Queensland Budget 300 AUD
