About this Training Course Exploration and production technology, equipment specification and processes have a unique language that must be conquered by executives such as you. A confident understanding of the technical jargon and a visual appreciation of the various pieces of equipment used provides for an overall 'big picture' of industry value chain. This serves as an excellent foundation for smooth communication and increased efficiency in inter-department project team efforts. Gain a comprehensive overview of the entire value chain and process of oil & gas upstream operations and business in this 3 full-day training course. Training Objectives By attending this industry fundamentals training course, participants will be better able to: Appreciate the dynamics of world energy demand & supply and its impact on pricing Understand the formation of petroleum reservoirs and basic geological considerations Examine the exploration process to gain an overview of the technical processes involved Gain a comprehensive overview of drilling activities - from pre-drilling preparation, through to well drilling, well evaluations and post drilling activities Get familiarised with the common production methods and the different stages of its processes Integrate your understanding of asset maintenance and downstream supply chain activities Better visualise through video presentations the various exploration equipment/ technologies and understand the major cost components Target Audience This course will be useful and applicable, but not limited to: Accounting Administration Business Development Commercial Construction E & P IT / Data Finance Finance & Treasury Health & Safety Human Resource Joint Venture Co-ordinators Legal Logistics Materials Planning Procurement Sales & Marketing Senior Management Sourcing Strategic Planning Supply Chain Tender Contract Course Level Basic or Foundation Training Methods Multi-media presentation methodology to enable better understanding and appreciation technical jargon and equipment applied in the field A pre-course questionnaire to help us focus on your key learning objectives Detailed reference manual for continuous learning and sharing Limited class size to ensure one to one interactivity Trainer Your expert course leader worked for BP for 28 years as a Research Associate and Team Leader, working on Feasibility Studies and acting as a trouble shooter covering all aspects of BPs businesses. These covered field Development Project in the North Sea and several novel resource recovery techniques which were taken from Concept to Field Pilot trials in Canada. His specific work in the offshore area covered Subsea Robotics / Automation, Seabed Production Concepts, Seabed Excavation Methods, Underwater Repair Techniques, Flexible Riser Studies and Maintenance Cost Reductions. After leaving BP in 1992, he continued working in the offshore oil industry through Azur Offshore Ltd, including activities in the assessment of Emerging and Novel Technologies, Technical and Economic Audits, Studies, Production Sharing Agreement Evaluations, Safety and Environmental issues. Clients have included Chevron UK, BP Exploration, British Gas, Technomare, Trident Consultants, Fina UK and Cameron France. He is a regular University lecturer at Crandfield School of Industrial Sciences (UK) and is a course Group Project external examiner for Crandfield. He also lectures on offshore oil industry activities at ENSIETA (France), the Technical University of Delft (Holland) and the Northern Territories University in Darwin (Australia). He is an active member of the UK Society for Underwater Technology (SUT) and serves on their Subsea Engineering and Operations Committee. POST TRAINING COACHING SUPPORT (OPTIONAL) To further optimise your learning experience from our courses, we also offer individualized 'One to One' coaching support for 2 hours post training. We can help improve your competence in your chosen area of interest, based on your learning needs and available hours. This is a great opportunity to improve your capability and confidence in a particular area of expertise. It will be delivered over a secure video conference call by one of our senior trainers. They will work with you to create a tailor-made coaching program that will help you achieve your goals faster. Request for further information post training support and fees applicable Accreditions And Affliations
The aim of the Level 3 NVQ Diploma in Wood Occupations (Construction) qualification is to recognise the knowledge, skills and competence of individuals who specialise in a wood based occupation in the construction industry eligible for the Gold CSCS Card. Upon completion of the qualification, you will be awarded the NVQ Level 3 Diploma in Wood Occupations. The qualification modules will be discussed and agreed upon with each individual candidate to ensure that the qualification will be suited to your job role. Each candidate will be allocated a designated and qualified assessor to provide support throughout the qualification and provide information, advice and guidance to candidates in order that they can achieve the qualification. If you require further information or are looking to undertake this qualification, please contact us. CSCS Cards Candidates can undertake the CSCS test and obtain the red (Provisional) CSCS card on signing up for various qualifications. The red card can usually be obtained within 7 to 14 days and can be used to access the construction sites for a period of 12 months. On completion of the qualification, candidates can upgrade or renew their CSCS Card card to the full 5 year card.
***24 Hour Limited Time Flash Sale*** Leadership, Supervisor and Line Management Admission Gifts FREE PDF & Hard Copy Certificate| PDF Transcripts| FREE Student ID| Assessment| Lifetime Access| Enrolment Letter Leadership, Supervisor and Line Management Discover the power of effective leadership with our exclusive bundle of 8 courses - Leadership, Supervisor, and Line Management. This comprehensive package is designed to equip you with the essential knowledge and skills needed to excel in leadership roles. With 3 QLS-endorsed courses and 5 relevant CPD QS-accredited courses, this bundle offers a well-rounded learning experience. Unleash your leadership potential with our QLS-endorsed courses. Gain in-depth insights into Leadership Training, Supervisor Training, and Line Management, and receive hardcopy certificates upon completion. These courses provide you with the foundational understanding of leadership principles and practices, enabling you to make a positive impact in your professional journey. Expand your expertise further with our 5 CPD QS-accredited courses. These courses are carefully curated to enhance your understanding of crucial topics relevant to leadership and management, equipping you with the knowledge to navigate complex workplace scenarios. Key Features of the Leadership, Supervisor and Line Management Bundle: 3 QLS-Endorsed Courses: We proudly offer 3 QLS-endorsed courses within our Leadership, Supervisor and Line Management bundle, providing you with industry-recognized qualifications. Plus, you'll receive a free hardcopy certificate for each of these courses. QLS Course 01: Leadership Training QLS Course 02: Supervisor Training QLS Course 03: Line Management 5 CPD QS Accredited Courses: Additionally, our bundle includes 5 relevant CPD QS accredited courses, ensuring that you stay up-to-date with the latest industry standards and practices. Course 01: Motivational Leadership Course 02: Workplace Diversity Course 03: Equality, Diversity and Discrimination Course 04: Conflict Resolution Course 05: Dealing With Difficult People Training In Addition, you'll get Five Career Boosting Courses absolutely FREE with this Bundle. Course 01: Professional CV Writing Course 02: Job Search Skills Course 03: Self Esteem & Confidence Building Course 04: Professional Diploma in Stress Management Course 05: Complete Communication Skills Master Class Convenient Online Learning: Our Leadership, Supervisor and Line Management courses are accessible online, allowing you to learn at your own pace and from the comfort of your own home. Unlock a world of opportunities with our Leadership, Supervisor, and Line Management bundle. Embark on a fulfilling career path, where you can contribute to organizational growth and inspire others to reach their full potential. Join us today and elevate your leadership capabilities to new heights. Learning Outcomes: Develop a comprehensive understanding of leadership theories and principles Acquire practical strategies for effective supervision and line management Cultivate motivational leadership skills to inspire and lead teams Enhance awareness and appreciation of workplace diversity and inclusion Acquire conflict resolution techniques for fostering a harmonious work environment Develop effective communication and interpersonal skills to deal with difficult individuals Gain a holistic understanding of equality, diversity, and discrimination issues in the workplace Immerse yourself in the world of leadership, supervisor, and line management with our comprehensive bundle. With a unique combination of 3 QLS-endorsed courses and 5 relevant CPD QS-accredited courses, this package offers a transformative learning experience. Discover the principles, techniques, and strategies that will empower you to become a successful leader in any industry. From understanding leadership theories to navigating workplace diversity, conflict resolution, and dealing with difficult people, this bundle covers it all. Embark on a rewarding journey of personal and professional growth as you unlock your leadership potential. CPD 250 CPD hours / points Accredited by CPD Quality Standards Who is this course for? Aspiring leaders looking to develop a strong foundation in leadership principles Supervisors seeking to enhance their management and supervisory skills Professionals aspiring to advance their careers in line management Individuals who want to gain knowledge and insights into workplace diversity, conflict resolution, and dealing with difficult people Career path Team Leader: £25,000 - £40,000 per year Supervisor: £30,000 - £45,000 per year Line Manager: £35,000 - £60,000 per year Operations Manager: £40,000 - £70,000 per year Director of Operations: £60,000 - £100,000 per year Chief Executive Officer (CEO): £100,000+ per year Certificates Digital certificate Digital certificate - Included Hard copy certificate Hard copy certificate - Included
About this Virtual Instructor Led Training (VILT) This 4 half-day Virtual Instructor Led Training (VILT) course presents the principles and best practices of portfolio management in the upstream (E&P) oil and gas industry. The VILT course is equally valuable for small independents, large integrated international companies and national oil companies. The VILT course consists of presentations, case studies, illustrative practical exercises and syndicate discussions. Particular emphasis is given to pragmatic portfolio management approaches and solutions which can be implemented swiftly without recourse to major investments in planning and portfolio management software. The VILT course will draw on examples from your expert course leader's 35+ years' experience in the oil and gas industry as an explorationist, upstream vice-president and management consultant. The VILT course handout will comprise softcopy slides used in the presentation and a softcopy workbook for the exercises. Participants will gain proficiency in portfolio management techniques, understand how and why to undertake this activity and be able to apply key concepts directly in the business of their teams / divisions. The VILT course will be presented over 4 half-days, using Microsoft Teams or Zoom and a proprietary set of VILT tools. Participants will be asked to complete a pre course questionnaire (PCQ) addressing their objectives and experience, and attend a session to familiarise themselves with VILT tools before course commencement. Training Objectives To present the tools, concepts and principles of portfolio management To define the quantitative metrics which are used to describe projects in a portfolio To understand the benefits of portfolio management at different stages of the upstream business: in strategy development, opportunity screening, business development, drilling prospects, conducting appraisal of discoveries and developing fields To put portfolio management in the organisational context by describing the role of the portfolio management team and examining how value assurance (quality control) is best conducted on portfolio data for projects and assets To demonstrate how portfolio management contributes to improved business performance By the end of the VILT course, participants will understand: Key concepts and principles of portfolio management How to design a simple portfolio database and describe complex projects in a small number of objective metrics How to segment the portfolio into meaningful units How to use portfolio data in making business choices and decisions at the strategic and tactical levels The extent to which it is meaningful and reasonable to make comparisons across different portfolio segments How the portfolio management team can support the wider business in decision-making Target Audience This VILT course is specially designed for exploration and development geoscientists, E&P economists and finance staff, and E&P managers. Both technical and non-technical staff will benefit from the concepts presented. Companies are encouraged to send participants from different functions and seniority levels to gain great benefits especially those which would like to implement the concepts presented in this VILT course. Course Level Basic or Foundation Training Methods The VILT course will be delivered online in 4 half-day sessions comprising 4 hours per day, with 2 breaks of 10 minutes per day. The VILT course will be presented in an interactive workshop format that allows for discussion. Course Duration: 4 half-day sessions, 4 hours per session (16 hours in total). Trainer Your expert course leader draws on more than 35 years of experience managing, reviewing and directing projects in all aspects of the exploration business: from exploration business development (new ventures), through prospect maturation and drilling, to the appraisal of discoveries. He has more than 30 years' experience with Shell International, followed by 10 years consulting to NOCs in Asia Pacific, Africa and South America and independent oil companies in the United Kingdom, continental Europe and North America. Other than delivering industry training, he has worked on projects for oil & gas companies of all sizes, including independents, national oil companies and (super)-majors, private equity firms, hedge funds and investment banks, and leading management consulting firms. He is an alumnus of Cambridge University. He has M.A and Ph.D. degrees in geology and is a Fellow of the Geological Society of London as well as a respected speaker on management panels at international conferences. Professional Experience Management consultancy & executive education: Advice to investment banks, businesses and major consulting firms. Specialist expertise in upstream oil & gas, with in depth experience in exploration strategy, portfolio valuation and risk assessment. Leadership: Managed and led teams and departments ranging from 3 - 60 in size. Provided technical leadership to a cadre of 800 explorationists in Shell worldwide. Member of the 12-person VP team leading global exploration in Shell, a $3 bln p.a. business and recognised as the most effective and successful among its industry peers. Accountability & decision-making: Accountable for bottom-line results: in a range of successful exploration ventures with budgets ranging from $10's million to $100's million. Made, or contributed to, complex business decisions / investments, taking into account strategic, technical, commercial, organisational and political considerations. Corporate governance: Served as non-executive director on the Boards of the South Rub al Khali Company (oversight of gas exploration studies and drilling in Saudi Arabia) and SEAPOS B.V. (exploration deep-water drilling and facilities management). Technical & operations: Skilled in exploration opportunity evaluation, the technical de risking of prospects, portfolio analysis and managing the interface between exploration and well engineering activities. Unparalleled knowledge of the oil and gas basins of the world, and of different operating regimes and contractual structures, ranging from Alaska, Gulf of Mexico and Brazil, through to the Middle East, former Soviet Union, Far East and Australia. Safety: Following an unsatisfactory audit, became accountable for safety performance in Shell's exploration new ventures. Through personal advocacy and leadership of a small team, delivered pragmatic and effective HSE systems, tools and staff training / engagement and a dramatically improved safety record. R&D: Experience in the 3 key roles in R&D: scientific researcher, research manager, and 'customer' for R&D products. After re-defining Shell's exploration R&D strategy, led the re-structuring of the R&D organization, its interface with 'the business' and approaches to deployment and commercialization. Strategy: Accomplished at formulating competitive strategies in business, R&D and technology deployment, translating them into actionable tactics and results. Defined the exploration strategy of PDO (a Shell subsidiary in Oman) and latterly of Shell's global exploration programme. Professional education, behavioural/motivational coaching: Experienced in organisational re-design, change management, leadership education and talent development. Commercial skills: Personally negotiated drilling compensation claims, educational contracts and E&P contracts, with values of $5 million to $100+ million. POST TRAINING COACHING SUPPORT (OPTIONAL) To further optimise your learning experience from our courses, we also offer individualized 'One to One' coaching support for 2 hours post training. We can help improve your competence in your chosen area of interest, based on your learning needs and available hours. This is a great opportunity to improve your capability and confidence in a particular area of expertise. It will be delivered over a secure video conference call by one of our senior trainers. They will work with you to create a tailor-made coaching program that will help you achieve your goals faster. Request for further information about post training coaching support and fees applicable for this. Accreditions And Affliations
Students who complete PV202 will be able to: Define the purpose of the National Electrical Code (NEC®) and NEC® terminology for PV equipment Determine procedures for proper installation of equipment and conductors, including minimum requirements for working space Examine methods for PV wire management and determine where expansion fittings are required Describe and identify electrical services, including split-phase and three-phase Wye (Y) and Delta (â) Evaluate electrical service details to collect and record during solar site evaluation Identify options for NEC®-compliant PV system interconnection to the utility grid and determine whether a supply side, load side, or additional service connection is appropriate Identify code-compliant methods for connecting an inverter to an existing AC feeder Calculate PV module voltage based on temperature to ensure compatibility with system components and NEC® Section 690.7, and explore other options for maximum PV system DC voltage calculations Identify NEC® requirements and sizing of disconnects and overcurrent protection devices (OCPDs) in grid-direct PV systems Define inverter grounding configurations Evaluate inverter choices and system configurations, including string inverters, central inverters, and module level power electronics (MLPE) Identify requirements for equipment grounding, equipment grounding conductors (EGC), and grounding electrode conductors (GEC), and size the conductors according to the NEC® Identify common causes of ground-faults and arc-faults Describe ground-fault and arc-fault protection devices Describe benefits and appropriate locations of surge protection devices (SPD) Demonstrate the use of sun charts and perform calculations to determine row spacing and minimize inter-row shading Identify how Codes detailing access for first responders impact PV array roof layout Examine fire classifications that affect racking and module selection Detail NEC rapid shutdown requirements and options for implementation Identify load and structural considerations for low- and steep-slope roof-mounted PV systems Calculate wind uplift force and select appropriate lag bolts Review issues related to planning, design, and installation of ground-mount PV arrays Review PV system circuit terminology, definitions, and conductor types Calculate minimum overcurrent protection device (OCPD) size and conductor ampacity using appropriate adjustment and correction factors Calculate voltage drop and verify system operation within acceptable limits Examine requirements for PV system labeling Calculate the maximum and minimum number of modules per PV source circuit, and number of PV source circuits per inverter Determine size of residential grid-direct PV system based on site and customer-specific considerations including the number and wiring layout of modules, conductor and OCPD sizes, and the AC interconnections Determine the size of a large, multiple inverter, grid-direct PV system based on site and customer-specific considerations, including the quantity and layout of modules and inverters and the AC interconnection Define large-scale PV and review associated NEC® allowances and requirements Describe importance of Data Acquisition Systems (DAS) Identify common DAS equipment and hardware Review DAS design, installation, and commissioning processes and common problems associated with DAS Show how reports can be generated and utilized to remotely assess health of system
Students who complete PV203 will be able to: Recognize demand and PV production curves Identify the common types of PV systems and their major components Describe DC and AC coupled systems Discuss load profiles and modes of operation, including: peak load shaving, time-of-use, zero-sell, self-consumption prioritization, demand-side management Introduce utility-scale storage and microgrids Explain the relationship between real power, apparent power, and reactive power Complete a load estimate for different system types and for seasonal loads; evaluate electrical requirements of loads Identify phantom loads and efficiency upgrades Estimate starting surge and power factor requirements Describe the differences when sizing battery-based systems compared to grid-direct systems Choose a peak sun hour value based on design criteria for various systems Review battery basics and terminology Describe and compare different battery chemistries and technologies Find the capacity and voltage of different batteries; determine state of charge List safety precautions and hazards to be aware of when working with batteries; list appropriate personal protective equipment (PPE) Identify appropriate battery enclosures Calculate values for current, voltage, and energy for different battery bank configurations Review battery bank design parameters Complete a lithium-ion battery bank design example Review and compare different design example costs List features, options, and metering available for different types of battery chargers Explain basics of lithium battery charging Compare generator types and duty cycle ratings, including fuel options Identify specifications critical for choosing appropriate battery-based inverters Discuss different overcurrent protection devices and equipment disconnects and when/where they are required Define the maximum voltage drop slowed for the proper functioning of a battery-based PV system Identify safe installation procedures List basic commissioning tests which should be completed before and after a system is operating
Multimode system configurations Load analysis and battery bank sizing PV array sizing Specifying multimode inverters Advanced multimode functions Code compliance, best practices, and installation considerations Charge controllers for multimode systems DC coupled multimode battery backup design example AC coupled system design considerations AC coupled multimode battery backup design example Energy Storage Systems (ESS) overview ESS residential sizing example Large-scale multimode system design and use cases Note: SEI recommends working closely with a qualified person and/or taking PV 202 for more information on conductor sizing, electrical panel specification, and grounding systems. These topics will part of this course, but they are not the focus.
Stand-alone system configurations Charge controller and array considerations RV system design example DC lighting system design example Clinic system design example Code compliance and best practices for stand-alone systems Advanced battery-based inverters Generator sizing DC coupled stand-alone residential system design example AC coupled stand-alone microgrid system design example Large-scale microgrid considerations and case studies Flooded battery maintenance considerations Stand-alone PV system commissioning and maintenance Note: SEI recommends working closely with a qualified person and/or taking PV 202 for more information on conductor sizing, electrical panel specification, and grounding systems. These topics will part of this course, but they are not the focus.
Who is this course for? The Diploma in Visual Effects for Film and Television Animation is tailored for individuals aspiring to work in the Visual Effects, TV, Film, and 3D animation industry. Gain essential skills necessary for a successful career in these fields. Click here for more info: Website Duration: 120 hours of 1-on-1 Training. When can I book: 9 am - 4 pm (Choose your preferred day and time once a week). Monday to Saturday: 9 am - 7 pm (Flexible timing with advance booking). Course Overview for a 120-Hour Diploma Program in Game Design and Development Term 1: Introduction to Game Design and 3D Modeling (40 hours) Module 1: Introduction to Game Design (1 hour) Understanding the game development industry and current trends Exploring game mechanics and fundamental design principles Introduction to the game engines and tools utilized in the program Module 2: 3D Modeling with 3ds Max (25 hours) Familiarization with 3ds Max and its user interface Mastering basic modeling techniques like box modeling and extrusion Advanced modeling skills including subdivision and topology Texturing and shading techniques tailored for game development Module 3: Character Design and Animation (10 hours) Introduction to character design and its developmental process Creating and rigging characters specifically for games Keyframe animation techniques for character movement Term 2: Game Development and Unity 3D (40 hours) Module 4: Unity 3D Basics (20 hours) Navigating Unity 3D and understanding its interface Grasping fundamental game development concepts within Unity Creating game objects, writing scripts, and designing scenes Introduction to scripting using C# Module 5: Advanced Game Development with Unity 3D (10 hours) Constructing game mechanics including UI, scoring, and game states Working with physics and collision systems in Unity Crafting intricate game environments and level designs Module 6: Game Assets with Photoshop (10 hours) Exploring Photoshop tools and features for game asset creation Crafting game elements such as textures, sprites, and icons Optimizing assets for seamless integration into game development Term 3: Advanced Game Design and Portfolio Development (40 hours) Module 7: Advanced Game Design (20 hours) Delving into advanced game design concepts like balancing and difficulty curves Understanding player psychology and methods for engaging audiences Implementing game analytics and user testing for refinement Module 8: Portfolio Development (24 hours) Building a comprehensive portfolio showcasing acquired skills Effective presentation techniques for showcasing work Establishing a professional online presence and networking strategies Final Project: Creating and presenting a collection of best works in collaboration with tutors and fellow students Please note: Any missed sessions or absence without a 48-hour notice will result in session loss and a full class fee charge due to the personalized one-to-one nature of the sessions. Students can request pauses or extended breaks by providing written notice via email. What can you do after this course: Software Proficiency: Master industry-standard design tools for architectural and interior projects. Design Expertise: Develop a deep understanding of design principles and spatial concepts. Visualization Skills: Acquire advanced 2D/3D rendering and virtual reality skills for realistic design representation. Communication and Collaboration: Enhance communication skills and learn to collaborate effectively in design teams. Problem-Solving: Develop creative problem-solving abilities for real-world design challenges. Jobs and Career Opportunities: Architectural Visualizer Interior Designer CAD Technician Virtual Reality Developer 3D Modeler Project Coordinator Freelance Designer Visualization Consultant Students can pursue these roles, applying their expertise in architectural and interior design across various professional opportunities. Course Expectations: Maintain a dedicated notebook to compile your study notes. Schedule makeup sessions for any missed coursework, subject to available time slots. Keep meticulous notes and maintain a design folder to track your progress and nurture creative ideas. Allocate specific time for independent practice and project work. Attain certification from the esteemed professional design team. Post-Course Proficiencies: Upon successful course completion, you will achieve the following: Develop confidence in your software proficiency and a solid grasp of underlying principles. Demonstrate the ability to produce top-tier visuals for architectural and interior design projects. Feel well-prepared to pursue positions, armed with the assurance of your software expertise. Continued Support: We are pleased to offer lifetime, complimentary email and phone support to promptly assist you with any inquiries or challenges that may arise. Software Accessibility: Access to the required software is available through either downloading it from the developer's website or acquiring it at favorable student rates. It is important to note that student software should be exclusively utilized for non-commercial projects. Payment Options: To accommodate your preferences, we provide a range of payment options, including internet bank transfers, credit cards, debit cards, and PayPal. Moreover, we offer installment plans tailored to the needs of our students. Course Type: Certification. Course Level: Basic to Advanced. Time: 09:00 or 4 pm (You can choose your own day and time once a week) (Monday to Friday, 09 am to 7 pm, you can choose anytime by advance booking. Weekends can only be 3 to 4 hrs due to heavy demand on those days). Tutor: Industry Experts. Total Hours: 120 Price for Companies: £3500.00 (With VAT = £4200) For Companies. Price for Students: £3000.00 (With VAT = £3600) For Students.
Participants perform preliminary system sizing for mechanical and electrical power generation of 50-watt to 100-kilowatt capacities. This training combines class lectures with site tours and lab exercises. Hands-on exercises include: methods of flow measurement, determining head, analyzing and assembling small functioning systems. The class is taught by two highly experienced Micro-hydro installers/instructors. Topics Include: • Learn safety procedures working with electricity • Understand fundamental water hydraulics and hydrostatic pressures. Understand the difference between static and dynamic heads. • Understand the various components of hydroelectric systems • Identify the two major hydro turbine groups (reaction and impulse turbines) • Learn the differences between AC and DC Systems • Develop site analysis skills for measuring water flow and elevation difference (head) • Review 6 different plan examples of hydroelectric system designs • Learn battery design and energy storage techniques • Understand controls for balancing energy production with energy loads • Summarize troubleshooting procedures and resources • Develop maintenance requirements both short and long term • Learn integration techniques for hybrid solar, wind and hydroelectric systems • Review 4 case studies using different turbine types • Learn legal requirements for hydroelectric systems including FERC permits, water rights and stream alteration.