Infrared temperature sensor working principleKazi

I have two projects one that uses lidar sensor functionality and the other project is made for an autonomous car model, i want to integrate both Projects together to enable lidar sensor feature in my car model. to make car model have lidar sensor with another existed sensor.

...clients. The dashboard should display the data transmitted by the sensors in a clear and understandable way. The data to be displayed includes: - Temperature and humidity - Air quality indexes - Energy consumption metrics - Parameter Dements on sensor - Scalability: The platform should be able to handle a large number of clients - more than 50. It should be designed with scalability in mind to accommodate potential growth. Skills and Experience: - Proficiency in LoRaWAN technology: As the core of this project is based on LoRaWAN, the ideal candidate should have a strong understanding of this technology and experience working with it in a similar context. - Full-stack Development: The project requires the creation of a fully functional platform, in...

...a specific focus on sensor network and penetration testing, The aim of this project is to explain the principles, intricacies, vulnerabilities, and mitigation strategies of sensor networks in cybersecurity. However, the twist here is, the information needs to be broken down to a level that non-technical decision-makers can understand. More details about time frame and milestones will be discussed in the chat window. - The freelancer should have: - Deep knowledge and understanding of cybersecurity and sensor networks. - Strong technical writing skills, with proven ability to simplify complex concepts. - Experience in communicating technical ideas to non-technical audience. - The report should include: - An easy-to-understand exploration of ...

I need a professional, informative A4 poster to help teachers in a K-12 independent school in Australia locate and wear the hearing augmentation device provided in a classroom setting. The goal of this poster is to persuade that it is expected they use hearing augmentation to assist with hearing for understanding. Key...dock at the end of the lesson." Ideal Skills: - Graphic design: The ability to create a visually appealing, yet informative, poster. - Educational experience: Understanding of effective teaching aids and ability to present technical information in a user-friendly way. - Familiarity with hearing augmentation devices would be a bonus. Please see:

...com/jordali/sketch-product-ideas-out-of-a-concept I need a quick turnaround. please include 3 links of previous sketches in your bids thanks for bidding For my first sketch I need an “ice chest freezer” based on the attached schematic. The final version looks like the 2nd image. The part list is included below: (just in case you don't know) Ice Chest https://www.amazon.com/Igloo-Removable-Free-Standing-Temperature-Basements/dp/B0CGKM3MK3/ref=sr_1_4_sspa?sr=8-4-spons&ufe=app_do%3Aamzn1.fos.c3015c4a-46bb-44b9-81a4-dc28e6d374b3&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY Chiller coil (inside ice chest) https://www.amazon.com/NY-Brew-Supply-AZ-W3850-CV-chiller/dp/B01893T0SC/ref=sr_1_5?sr=8-5 Radiator https://www.amazon.com/DNA-Motoring-RA-ARSX02-MT-2-Aluminum-Radi...

1. I have a list of wallet addresses i scraped. 2. Bot needs to trade on ETH/uniswap & pancakeswap universal, v2 and v3 routers. 3. It should copy all the wallet addresses I paste. When they buy, bot buys. When they sell, bot sells. 4. The max. limit feature in the UI, means, we track token not buy amount. So if one wallet buys for 100k, we set a limit of e.g. 1k.. 5. So bot would need to apply the max. limit feature to all the addresses it is tracking. Max. limit feature is in ETH btw..

I need a PHP script to calculate working hours based on the start and end time. The script should: - Calculate working hours based on the start and end time - Handle only standard working hours - Automatically deduct a fixed break time Ideal skills and experience for this project include: - Strong PHP programming skills - Experience with time and date calculations - Understanding of working hour calculations and break time deductions - Ability to create a clean and efficient script

I'm in need of an experienced IoT device developer to create a production-level device specifically tailored to calculate current flowing through a phase in a transformer. Ideally, the skill-set of the successful freelancer will include: - Experience with ESP3266 and clamp current sensor. - Expertise in the development of IoT devices that can perform real-time monitoring. - Capable of crafting a solution that concentrates specifically on current level monitoring. - Should be more efficient and accurate current flow value - AWS iot core experience will advantage - Open for suggestions for production level. This project could potentially roll into a long-term contract depending on the success of the initial task. So, if you have the skills and experience, please place your bi...

I'm looking for a proficient Arduino engineer to integrate ...proficient Arduino engineer to integrate and build a project revolving around proximity sensor integration. This project is centered around a 6 sensor counter setup. The ideal skills and experience for this job would include: -Strong knowledge in Arduino -Experience in sensor integration, specifically proximity sensors -Understanding of data logging and its applications Responsibilities will include: -Programming the Arduino to reflect sensor integration -Developing a setup to add 6 proximity sensors together into one counter -Assuring that data logging works optimally with the integrated sensors If you possess these skills and believe in delivering quality work, please submit your proposal....

I am looking for an experienced Flutter developer to create a minimal example that can effectively scan iBeacons for Android. This should be a simple, text-based UI that can display the UUID, major & minor values, as well as signal strength of iBeacons. Furthermore, it's important that the scanner remains functional in the background via a foreground service, providing a simple text notification when interacted with. The detection process must be constant (ranging). Key requirements for the project: - Develop a minimal Flutter app for Android - Ability to scan iBeacons and display UUID, major and minor values, and signal strength - The app should continue to work in the background - Use a foreground service for background function - Provide a simple text notification from the fo...

...parameters are taken from the research paper (the research paper is attached). I propagated TR using a user-defined function (UDF) on ANSYS Fluent, but I couldn't get a higher cell temperature than the one mentioned in the paper. The UDF contains the data points and Time extrapolated from the research paper (Fig. 5). The heat generation is calculated using q''' = rho*Cp*dT/dt. (The work should be done on ANSYS Fluent). Key Tasks: - Conduct detailed thermal analysis and simulation on a Li-ion battery. - Show the transient response of cell temperature vs. Time (s) and heat generation (W/m3) vs. Time (s) - Temperature contour plots - Update UDF code. - Provide recommendations and solutions based on the analysis. - The simulation data should mat...

...focused on indoor people detection. The primary objective involves refining a photoelectric sensor system. Key project requirements are as follows: 1. Specific functionality: The system must accurately detect and identify individuals within an indoor environment. 2. Sensor sensitivity: The sensors should effectively detect people while minimizing false positives caused by small, irrelevant objects. The ideal candidate for this project should possess: Extensive experience in Arduino-based development, particularly with photoelectric sensors. Proficiency in testing the system for accurate people detection and troubleshooting any potential issues. Knowledge of human body detection algorithms and sensor tuning would be highly advantageous. I propose an hourly-based...

Help me with the software code and wiring for a Arduino. 1. turn the motor(hydraulic pump) forward and sense the currrent as it ramps up to 170mA and stops. 2. turn the motor in reverse and monitor the position sensor.

I've been experiencing issues with the Akamai 2.0 sensor data processing. The sensor data is not being processed correctly. I'm looking for a professional who can work through my full source code and fix these issues. Key Responsibilities: - Review the full source code of my system, which is built with Golang - Fix the issues related to processing the sensor data - Ensure the sensor data is collected, transmitted, and processed accurately I need someone with strong proficiency in Golang and javascript, as well as a deep understanding of sensor data processing. The ideal candidate should have experience in debugging and fixing similar issues in other systems.

...to initiate a pilot project for integrating my Cisco systems with temperature sensors. The main goal of this integration is to have a real-time display of temperature data in a dashboard, which will be critical for monitoring and decision-making. Key Requirements: - The project will involve setting up the necessary connections between my Cisco systems and temperature sensors, leveraging API for seamless communication. - The data received from the sensors should be visualized effectively on a dashboard. The preferred visualization method for the temperature data is graphs, which should be clear and easy to read. Ideal Skills and Experience: - Proficiency in Cisco systems and API integration. - Proven experience with temperature sensors and real-time d...

I am seeking an experienced Arduino coder for my robotics project. The primary task involves coding for a robot that specializes in collecting tennis balls from the ground. Key tasks and responsibilities: - Sensor-based detection: The robot needs to be able to identify and pick up tennis balls from the ground using sensors. Your code should enable the robot to execute these functionalities efficiently. I prefer if you have: - Proven experience in coding with Arduino, especially in robotics. - Detailed knowledge and experience in sensor-based detection systems. Your role in this project is vital for the operational success of the robot. Please only bid if you're confident in your ability to meet these requirements.

...be able to efficiently cool and heat the entire space. - Smart Thermostat Compatibility: I'm interested in integrating a smart thermostat into the system. This will enhance the overall control and energy efficiency of the system. - Zoned Cooling and Heating: I'm also keen on incorporating zoned cooling and heating. This feature will allow for different areas of the house to have customized temperature settings, improving comfort and efficiency. Ideal Skills and Experience: - HVAC Expertise: Prior experience with installing central air conditioning systems is a must. A deep understanding of the system's components and workings will be beneficial. - Smart Thermostat Integration: Experience in setting up smart thermostats and integrating them with central air s...

I'm looking for a skilled individual who can create a sketch for a rather specific and interesting project. Key Requirements: - Utilize a crash sensor micro switch: This element is the core of the project as it's designed to respond to an impact and trigger a series of events. - Trigger a 12v motor: The motor should start running as soon as the sensor detects an impact. - Simultaneously play a short MP3 file: The audio should begin playing once the sensor is activated, but it should be less than 30 seconds in duration. - Activate a solenoid latch: This component is crucial as it performs a critical function in the project. The solenoid latch should be triggered once the motor is on and the music is playing. - Stop the music and motor: Once the solen...

...co-working space in Jaipur that is tailored to the unique needs and preferences of local professionals and entrepreneurs. Through extensive market research, I've gathered valuable insights into what potential clients value in a work environment. Here's what I'm looking for in a freelancer to bring this vision to life: - A skilled interior designer with experience in autocad planning, sketchup and vray 3d design, 3d rendors , photoshop rendors, minimalist and ergonomic workspace layouts, who can incorporate light color schemes and natural elements, etc - A technology consultant who can implement a robust digital infrastructure, including high-speed internet, smart devices, and software subscriptions. - An acoustic engineer to ensure a variety of sound-managed areas...

Commission-Sales Representative for Growing Digital Business Solutions Agency KGA MEDIA is a growing data-driven digital business solutions agency who offer marketing, consulting, and business development services. We are passionate about delivering exceptional results and crafting innovative solutions for our clients. As we continue to expand, we are looking for a motivate...grow within a passionate agency. - Flexibility to work remotely and manage your own schedule. - Attractive commission structure with significant earning potential based on performance. - Be part of a company that values creativity, hard work, and results, with opportunities for professional growth and development. - We will not micromanage. Autonomy and independence within work is an important principle of ou...

More details: Is this project for business or personal use? For an existing business What information should successful freelancers include in their application? Past work How soon do you need your project completed? ASAP

I will design arduino project for distance measuring in ultrasonic sensor

I'm seeking an experienced Flutter developer who can create a cross-platform application for both iOS and Android. The principle objective of this app is to provide a platform for on-demand house cleaning services. Key Features to Implement: - User account creation and management - A system that allows users to schedule and manage house cleaning bookings - Payment processing feature - Real-time updating feature for tracking service progress Ideal Skills and Experience: - Strong experience in Flutter for iOS and Android - Successful track record of creating on-demand service mobile applications - Solid understanding of user account management, payment processing, and real-time updating systems - Knowledge of UI/UX for easy navigation and appealing design Your key role will...

I'm in need of an expert React developer to create a sophisticated water re...aiding in data-driven decision making. - **Automatic Irrigation System Control**: To ensure judicious water utilization, the site should feature sensor-based irrigation control. This entails automatic adjustment of irrigation schedules based on water levels detected by sensors. - **Weather Forecast Integration**: Integrate the site with a reliable weather forecast source. This will aid in planning and adjusting irrigation schedules considering the projected weather conditions. The ideal freelancer should possess solid React development skills and have previous experience working with IoT or smart agriculture technology. Familiarity with sensor-based systems and data visualizatio...

...products. Key Requirements: - Experience with Flutter: We need someone who is proficient with Flutter and can develop a mobile app from scratch. - BLE Connectivity: The app will be communicating with health devices using BLE. You should have prior experience in handling BLE communications. - Health Devices: The app will be used to connect with blood pressure monitors, ECG, stethoscope, SPO2, and temperature monitors. Knowledge about how these devices operate and collect data would be beneficial. Functionality: - Data Collection: The main purpose of the app is to capture all the data from the connected health devices via Bluetooth and store it in the app. - Data Accessibility: The stored data should be accessible offline, as we want users to be able to review their health data ...

I'm searching for a proficient Arduino coder, to support in integrating dc motor driver, lcd20x4 with I2c and inductive proximity sensor into my existing project. The primary goal is to control 2 dc motor simultaneously. Key requirements for this role include: * Proficiency in Arduino coding * Vast experience with sensor integration, specifically using inductive proximity sensors * micro controller

I am looking for a smart POS system with automated checkouts. Which means it should have a system that automatically scans and checkout products...scans and checkout products without the need of counter. Let me explain in storyboard. Story Board 1) A person goes to a supermarket, picks his products in trolley and moves through a gate or line. So there the camera or sensor should be placed and as he passes on the next stop there should be a screen and printer where his total amount is shown in screen and the printer prints his bill automatically. And the person can pay to the total amount to cashier via cash or online and get their products home. With this system, I'd expect the person to suggest the type of sensor or camera that needs to be purchased. Would be good if...

I have android studio project. I setup everything of firebase but Google login not working . any experience developer bid here of Android

I'm...serve as a comfortable, calming spot for unwinding and enjoying downtime. - Material: I prefer the patio to be constructed out of wood. It should complement the existing style of the house and provide a warm, natural aesthetic. - Design Element: I'd like to incorporate ceiling fans into this patio. These fans should provide both aesthetic appeal and practical function, helping to regulate the temperature and airflow, ideal for those warm, summer days. Experience with similar projects and a good eye for design are essential for this job. A keen understanding of structural integrity and the ability to seamlessly integrate the new construction with the existing house is crucial. Prior experience with wood construction and ceiling fan installations in outdoor spaces wou...

I'm in need of an experienced Arduino programmer, with a strong background in integrating sensors and controlling motors. Key project tasks: - Integrating a motion sensor with my Arduino - Managing control of a DC motor - Setting up data logging functionality - small servo motor controlling and calibration Ideal Skills: - Proficiency in Arduino programming - Prior hands-on experience with motion sensors and DC motors - Familiarity with data logging processes is a plus! If you have the right skill set, I'd love to connect and further discuss the project details. Making a simple servo motor controlling and switching between dc motor and servo motor by and e bike throttle bar

Tafadhali Jisajili ama Ingia ili kuona maelezo.

Tafadhali Jisajili ama Ingia ili kuona maelezo.

I'm looking for a skilled software developer to create a comprehensive control system for my greenhouse environment. Key Functionalities: - Temperature, humidity, light, fan, CO2, and irrigation control - VPD, nutrient dosing, and pH control User Interface: - I'm interested in a web-based interface for easy access and usage Additional Requirement: - Remote monitoring and control capabilities are a must. Ideal Skills: - Experience in developing similar systems - Proficiency in web-based software development - Knowledge of greenhouse environmental requirements Please provide your relevant experience and how you plan to address the functionalities I've outlined.

...multiple sensors like DHT22 for Temperature and Humidity, PMSX003 for Air Quality, Shelly 1 Switches to control some lights, couple of 5V relays with ESP32 to control other equipment, PIR sensors for the lights in the garden and few others as well as my Home Security. All sensors are attached to ESP32 modules and transmitting the data using Wi-Fi to the Home Assistant server. The data from all of the sensors is displayed on my Dashboard using various "Cards" and "Dashboards". All of the above has been perfectly working for years and I haven't had any issues with. The goal of this project will be to attach small 1.3" TFT display (ST7735 or similar) to the ESP32 board and display the value of the sensors on the screen with a gauge. Examp...

I require a specialist to implement a sensor data logging system using Arduino/ESP32. i Required candidate who have experties in aurdino / ESP32 and rotary encoder. Necessary Skills: - Comprehensive understanding of Arduino/ESP32 - Rotary encoder It's vital that the system be designed accurately to fulfill the need for reliable data storage. An understanding of data management and the capability to create systems for future data analysis is crucial. A background in similar projects would be greatly advantageous.

Tafadhali Jisajili ama Ingia ili kuona maelezo.

I am see...skilled graphic designer with experience in minimalist logo design. Understanding of color psychology is a necessity as I'd like to have the logo in beige, brown and lilac. I envision my blog's name - "New Category Design", accentuated with a symbol that exudes relevance to my business. Below are some key details regarding my expectations: - Color Scheme: Beige, brown, lilac (pastel, warm temperature) - Style: Minimalistic, clean, and professional - Imagery: Incorporation of a relevant business symbol, also clean, simple and professional Your previous portfolio on similar projects will be highly appreciated. Looking for innovative ideas and suggestions that can bring a wow factor to my business's identity. I want to own the rights on the logo ...

Hello, For a new project I need a IOT sensor that will be installed on a device that rotates. I need to know the amount of rotations so I can service the device before it will break down. My device is not always connected to WiFi/Internet. I would like to see the amount of rotations on a remote location but I don't have to see them realtime. One update per day or per week is enough, don't know it makes a difference, but if so we can reduce the amount of data transmissions. 12V is available Pulses are count with a rotary encoder and based on the device type I have to set the pulse count per revolution. The name of the device must be adjustable so I know which IOT is connected to which device. Please let me know your thoughts. Kind regards,

I'm looking to hire a creative 3D animator to develop an engaging commercial for a temperature control unit similar to this one () I've all the 3D files, what's needed is the video and the edit. Please, when make the offer put the actual price for the service. Thank you! Hope talk to you soon

BIOMETRIC MICRO-ATM FOR AEPS (AADHAAR ENABLED PAYMENT SYSTEM) Aadhaar enabled Payment System (abbreviated as AePS) - an Aadhaar dependent framework is rolled out by GOI for instigating financial inclusion in India to extend biometric & Aadhaar based banking/financial services to the citizenry through the fingerprint or iris Micro-ATMs. Incorporation...way that it offers a modern architecture blended perfectly with contemporary aesthetic. Our biometric device is absolutely suitable for the application of AePS as it is an all-in-one mobile terminal coupled with the biometric fingerprint & iris readers for efficient and accurate authentication of the customers. Furthermore, our biometric Micro-ATM deploys UIDAI/STQC approved fingerprint sensor & iris sensor with the ...

...calculation of equipment sizing from a laboratory scale to a bulk scale with a primary focus to enhance production capacity, improve process efficiency and optimize product quality. Key Project Components include: - Sizing of Reactors - Sizing of Heat Exchangers - Sizing of Pumps In relation to the reactors, aspects to be determined will include the volume, operating pressure, and operating temperature. Ideal skills and experience for this job would involve a deep understanding of chemical processing and engineering, particularly in the aspects of reactor dynamics, heat exchanger operations and pump calculations. An experienced chemical/process engineer would be an ideal fit for this project. Your knowledge and expertise will be invaluable in helping to size up our operati...

...system to monitor data from various IoT devices. The ideal candidate should be experienced in cloud-based solutions, IoT devices and data analysis. Key Features Required: - Real-time data monitoring capabilities for prompt and effective decision making. - Effective data visualization to understand the complex datasets that IoT devices generate. Devices & Sensors: - A wide range of devices like temperature sensors, motion sensors, and light sensors. - Capability to work with level, pressure, and any other device with an analog output. Data Storage & Retrieval: - System should support time-series data storage to enable historical data analysis. - Seamless database integration for efficient data management. - File storage capabilities to ensure a comprehensive dataset i...

I'm looking fo...a custom embedded system. The primary functionality of this system will be sensor integration, specifically an ultrasonic sensor for animal deterrent purposes. Key Responsibilities: - Design and develop an embedded system that integrates an ultrasonic sensor for animal deterrent. - Ensure the system can effectively detect and potentially deter animals through ultrasonic sound creation. Skills and Experience: - Proven experience in designing and implementing embedded systems. - Proficiency in sensor integration, particularly with ultrasonic sensors. - Understanding of animal behavior and deterrent methods would be a plus. Please share your prior relevant experience, including successful projects involving sensor integration and/or...

Project Brief: In this project, will be developing an application to sense, share and control another application on a nearby node. The application can be mobile, web or desktop. The application is required to: 1. Sense a nearby node. When a node comes within the com...remote node e.g., volume, brightness, wallpaper etc. Project Requirements 1. The deadline for the project is: 10-May-2024. a. Report: It should include: ii. Name of the application iii. Application’s purpose iv. Explanation of its functionality from the perspective of ad hoc and sensor networks v. Screenshots of the working applications b. Source Code along with a file. This file should include step-by-step instructions how to run the application. c. Peer evaluation form d. Demonstration of the work...

I'm seeking a graphic designer who embodies and conveys the ethos of sustainability through design. Your core assignment will be to translate this philosophy to a middle-aged audience (30-50). Central to this project would be your ability to create artistic and...would be your ability to create artistic and abstract interpretations of my brand to appeal to this demographic. Skills and experience needed include: - Expertise in designing logos, product designs, and social media campaigns. - Proven ability in implementing artistic, abstract style in designs, aligning with the brand's philosophy. - Strong understanding of sustainability as a core design principle. - Ability to intuitively appeal to a middle-aged audience. - Demonstratable experience with sustainable brands ...

I am seeking a skilled professional with expertise in Solidworks to design a part intended for manufacturing. Key Requirements: - The part will be primarily used in room temperature environments. - Precision and accuracy are crucial requirements for this project, as the part must meet exact specifications for manufacturing processes. Ideal Skills: - Solidworks - CAD/CAM Design - Mechanical Engineering The ideal candidate should have substantial experience creating high-precision Solidworks parts for manufacturing. Accuracy and attention to detail will be paramount in this job.

...tration-in-24-hours I need a quick turnaround. please include at least 3 examples of isometric work in your bid. thanks for bidding For my first sketch I need an “ice chest freezer” based on the attached schematic. The final version looks like the 2nd image. The part list is included below: (just in case you don't know) Ice Chest https://www.amazon.com/Igloo-Removable-Free-Standing-Temperature-Basements/dp/B0CGKM3MK3/ref=sr_1_4_sspa?sr=8-4-spons&ufe=app_do%3Aamzn1.fos.c3015c4a-46bb-44b9-81a4-dc28e6d374b3&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY Chiller coil (inside ice chest) https://www.amazon.com/NY-Brew-Supply-AZ-W3850-CV-chiller/dp/B01893T0SC/ref=sr_1_5?sr=8-5 Radiator https://www.amazon.com/DNA-Motoring-RA-ARSX02-MT-2-Aluminum-Radiator/dp/B00S70XHL...

...com/jordali/sketch-product-ideas-out-of-a-concept I need a quick turnaround. please include 3 links of previous sketches in your bids thanks for bidding For my first sketch I need an “ice chest freezer” based on the attached schematic. The final version looks like the 2nd image. The part list is included below: (just in case you don't know) Ice Chest https://www.amazon.com/Igloo-Removable-Free-Standing-Temperature-Basements/dp/B0CGKM3MK3/ref=sr_1_4_sspa?sr=8-4-spons&ufe=app_do%3Aamzn1.fos.c3015c4a-46bb-44b9-81a4-dc28e6d374b3&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY Chiller coil (inside ice chest) https://www.amazon.com/NY-Brew-Supply-AZ-W3850-CV-chiller/dp/B01893T0SC/ref=sr_1_5?sr=8-5 Radiator https://www.amazon.com/DNA-Motoring-RA-ARSX02-MT-2-Aluminum-Radi...

As an AI-driven project, I am seeking a freelancer experienced in machine learning to implement TensorFlow, scikit-learn, and PyTorch open-source tools to analyze and predict certain events. My project involves systemically analyzing data from different sensors, namely temperature (temp), relative humidity (RH), and other miscellaneous sensors. The outcome of this analysis should be predictive models capable of discerning behaviors, such as detecting when an AC unit has been turned on or off. Ideal characteristics: - Expertise in TensorFlow, scikit-learn, and PyTorch - Experience with influxdb / MQTT data handling - Strong statistical analysis skills - Knowledge in real-time data processing Your task would be to design systems that generate real-time notifications upon the occur...

...downtime prediction. The purpose of this system is to more accurately anticipate necessary maintenance and reduce unexpected downtime in industrial machinery by analysing operational data such as speed, temperature, equipment running time, and so on. We have the code available with us, you just need to make it work for another dataset and run it in Ubuntu. Prospective freelancers must have skills and experience in the following areas: - Docker, for providing the backbone of our decentralized system - Federated Learning, to collectively improve our model's performance without sharing raw data - Working with and analyzing operational data - Implementing predictive models, in this case a 3-layer feed-forward neural network and stochastic gradient descent (SGD) The fin...