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Many underlying relationships among data in several areas of science and engineering, e.g., computer vision, molecular chemistry, molecular biology, pattern recognition, and data mining, can be represented in terms of graphs. In this paper ,a new neural network model has propose which called graph neural network (GNN)

Quantum computation is a growing field at the intersection of physics, computer science, electrical engineering, and applied math. This course provides an introduction to the basics of quantum computation. Specifically, we will cover some fundamental quantum mechanics, survey quantum circuits, and introduce the most significant quantum algorithms. Furthermore, we will survey advanced topics towards the end of the course. In the past, these topics have included quantum error correction, quantum communication, and applications to fields ranging from machine learning to chemistry. This course is self-contained and does not require any prior knowledge of quantum mechanics.

A visual-based education platform for teaching complex topics in Chemical Engineering & Chemistry such as Thermodynamics, Advanced Statistics, Fluid Dynamics, Diffusion and Heat Transfer

Equation sheets of STEM courses at the University of Washington (UW). Topics include chemistry, physics, calculus, applied mathematics, and chemical engineering.

Course notes of STEM courses at the University of Washington (UW). Topics include chemical engineering, chemistry, and applied mathematics.

Material for the workshop portion of the "Theoretical and Computational Chemistry: Modeling Methods in Chemical Engineering" course at the University of Chinese Academy of Sciences

Notes and lab work of FY Electronics and Computer Engineering (KJSCE).

Just a few years ago, a company formed by three individuals decided that it would be making skateboards and sunglasses from recycled nylon. They were basing their efforts upon “trash” floating in the ocean, that they were determined should get cleaned up if they set the ball rolling and others joined them in the effort. “When we researched ocean waste, we learned that there’s a constant stream of nylon fishing nets being dumped into the ocean every year, nets that are just going to sit there for generations. This stuff doesn’t break down.” Today, the company pays fishermen in Chile to collect old nylon fishing nets, which are then recycled into skateboards and sunglasses. What is the material called Nylon? Nylon is a type of synthetic fiber fabric like polyester, made from petroleum products. Nylon was the first fabric made entirely in a laboratory and its invention represents the dawn of the age of synthetics. Nylon had started appearing in stores in 1939 in the form of women’s tights, but it was really the Second World War that opened up the market for Nylon. Nylon became widely available to the general public around the time of World War II. In fact during the war it extensively found of use in the making of parachutes and other military equipment. Prior to 1945, cotton and wool dominated the market; by the end of the war, synthetic fibers particularly nylon had eaten up a significant 25% of the market share. It is today commonly used to make clothing, backpacks and bags, stockings or tights, outdoor gear such as tents, rope, carpet, underwear and hosiery, nylon can also be found in the bristles of our toothbrushes, umbrellas, knits, and swimwear and active wear and many other items we use every day. The advantages of Nylon as a material First developed in the 1930s as an alternative to silk, there are lots of great qualities about the fabric. It is lightweight yet strong, and it is often touted for its quick-drying capabilities. Clothing manufacturers like it because it holds dye well. It is also less expensive to produce than silk and does not get damaged as easily. The making of nylon for fabric use Nylons are a family of materials called polyamides, made from reacting carbon-based chemicals found in coal and petroleum in a high-pressure, heated environment. This chemical reaction, known as condensation polymerization, forms a large polymer – in the form of a sheet of nylon. To make nylon fabric for apparel, this nylon sheet is then broken into chips, melted and drawn through a mechanical spinneret to produce individual fibres that are woven into fabric. This plastic is then put through an intensive chemical process, resulting in the strong, stretchy fibres that make it so useful as a fabric. So what is the idea about recycling Nylon? Since Nylon is made of petroleum products it will not biodegrade. Nylon doesn’t break down easily and accounts for about 10% of the debris in the ocean. According to the World Society for the Protection of Animals, more than 600,000 tons of fishing gear is dumped into oceans every year, including nylon nets. Fishermen often discard the nets because the alternative is much costlier – paying someone to dispose of them properly. For some reason locked deep in polymer chemistry, nylon is more difficult to recycle than polyester. After years of research, development, and testing, some recycled nylon fibers that are suitable for apparel and can pass the rigorous tests of manufacturability and product quality, is what the company found out. “Although we’ve been substituting non-recycled polyester for recycled versions for 20 years, only in the last five have we begun swapping out non-recycled nylon for its recycled replacement. Some of the recycled nylon we use comes from post-industrial waste fiber, yarn collected from a spinning factory, and waste from the weaving mills that can be processed into reusable nylon fiber. Another recycled nylon fiber we are experimenting with is re-created from discarded industrial fishing nets. Though a lot of experiments were conducted and extensive research on how nylon could be converted to its recycled biodegradable form was carried out, it was only in 2013 onwards that it actually produced desired results. In any case, incorporating as much recycled nylon as we can lessens our dependence on petroleum as a raw material source. It curbs discards, thereby prolonging landfill life and reducing toxic emissions from incinerators. It helps promote new recycling streams for nylon products that are no longer usable. And it causes less air, water, and soil contamination compared to using non-recycled nylon. Recycling of Nylon – a challenge in itself The economics of recycling nylon are not very appealing, however. An associate professor in plastic engineering at the University of Massachusetts Lowell, ran a research program on recycled fishing nets for the company. Nylon, he says, is not an easy or cheap material to recycle. Plus polymers, or plastics, are cheap to buy new which may be why many companies choose to use polyethylene terephthalate (PET) – the most common type of plastic found in soda and water bottles – instead . Contamination is another concern. Unlike metals and glass, which are melted at high temperatures, nylon is melted at a lower temperature, meaning some contaminants – non-recyclable materials and microbes or bacteria – can survive. This is why all nylons have to be cleaned thoroughly before the recycling process. “When you’ve dragged a fishing net through a boat, on the ocean floor, and wherever else, it’s a lot harder to clean before you can recycle it,” Johnston says. That’s why Johnston is supportive of circular economy business models, in which businesses keep resources in use for as long as possible, extract their maximum value and then recycle and reuse products and materials. “What would change the recycling scene is if we were charged per pound for all waste. Or if companies had to take back part of what they produced.” The company has an idea already: the company’s sunglasses come with a lifetime warranty. In fact it will fix any pair of glasses free of charge, or provide customers with new frames if their product is beyond repair. Old frames are recycled. And another Italian manufacturer Aquafil has nylon fibers in its carpets. After nearly 40 years of producing carpet yarn, a growing awareness of the environmental harm caused by synthetic materials made it want to turn towards a more environmentally friendly business model. In 2007, Aquafil began developing a machine that can churn through most kinds of nylons, producing new threads ready to be repurposed. Aquafil now sells these threads, called Econyl, to American brands such as Outerknown, an LA-based outerwear company started by pro surfer Kelly Slater, and swimwear giant Speedo. LA-based Masami Shigematsu works on product development for Speedo. She says that she had been actively searching for recycled nylon for years before she found Econyl. “It has to perform well. It can’t just be a sustainable material. Our products are being used by athletes who need it to function as good as new material.” In 2014, Shigematsu met with Aquafil and started experimenting with the fabric. Last year, Speedo rolled out two products with Econyl and has since expanded to include more than 50 products made with the material. Has corporate social responsibility become the modern gold rush? California-based Patagonia has also been adding more recycled nylon to its lineup. Currently, the company has more than 50 products that contain recycled nylon in various percentages. The Torrent shell jackets, for instance, have an outer layer textile made with 100% chemically recycled nylon. It took Patagonia nearly 15 years to develop the technology to recycle polyester to a point where it was as good as virgin polyester. Patagonia wants to go further than just use recycled nylon in its products. How to they Recycle Nylon Just about everyone has nylon around their home. It is in the backpacks our kids take to school, the pantyhose women wear to work and the cheap, reusable shopping bags everyone is handing out these days. There are very few places that accept nylon for recycling. It is unlikely that you can recycle it through your curbside program, and equally so that your local recycling center will have a handy bin that says, “Put your unwanted nylon here!” Your ability to recycle nylon depends largely on the form it takes; for example, nylon pantyhose are easier to recycle than nylon backpacks. But remember: If you cannot recycle an item made of nylon, you may be able to reuse it rather than putting it in the trash. The problem with nylon is that, like many fabrics, it is difficult to recycle, especially once it has been used. Second-hand fabrics typically need to be cleaned before they can be recycled, and it is often not cost-effective for companies to do that. However, there are a few nylon recycling options out there. How to recycle or reuse nylon bags Nylon bags are challenging to recycle unless you purchase one from a company that offers a take back program. San Francisco-based Timbuk2 is one such company. Once your nylon messenger or camera bag is worn out, simply stick it in a box and mail it to the company at the address provided on its website. Timbuk2 will reuse or recycle as many of the materials as possible. There is no charge for the company’s recycling services (other than the cost of postage), and customers that send in products to be recycled will receive a 20% discount on a future purchase. There may also be creative ways to reuse unwanted nylon bags. If you have a backpack that is in good shape that you no longer want, consider donating it to a thrift shop or a program that helps children get school supplies. If you have a large shopping bag with a hole it in, cut it apart and use the good nylon to make a smaller storage bag. How to recycle or reuse nylon fabric Leftover nylon fabric from a sewing project is a great material to reuse. See if your community has an organization that provides fabric and supplies to artists and schools. Materials for the Arts in New York City and The Scrap Exchange in Durham, NC, are a few examples. If you have nylon clothing you want to recycle, and you purchased that clothing from popular outdoor gear manufacturer Patagonia, you can return it to the company for recycling. Get more information about Patagonia’s recycling program on its website. How to recycle and reuse nylons or tights No Nonsense, which makes nylons, tights and other types of leggings, offers a recycling program for consumers. The first step is visit their pantyhose recycling page and print a prepaid mailing label. Next, place all your unwanted nylon leggings in a box and put on the shipping label. Drop it at your nearest post office or other mailing location, and your old nylons are on their way to a recycling facility. No Nonsense sends the material to a plant that recycles it into things like playground equipment, toys and vehicle insulation. There are lots of ways to reuse old nylons as well. Put a bar of soap in the toe of a clean nylon (make sure there is no run in that section). Tie off the open end and hang the sock by the sink. When you go to wash your hands, get them plenty wet then roll the sock between your hands. This works really well in potting sheds, barns or other places where a soap dish might not be practical. Use nylons to tie up tomatoes or other plants that need support as they grow. Fill a clean nylon with potpourri or lavender. Use it as a sachet in your drawers, car or any other area you want to smell fresh. But then what is to be Nylon’s impact on the planet? Different kinds of nylon have different properties, but the common threads between each are strength, durability and ability to be moulded into shape. The flip side is that no form of nylon is biodegradable; so once you no longer have a need for your torn stockings or old toothbrush, it sits in a landfill for at least 30 years. Nylon is in part derived from coal and petroleum. In producing nylon there is creation of Greenhouse gases: producing nylon creates nitrous oxide, a greenhouse gas that is 300 times more potent than carbon dioxide. Water: manufacturing nylon is a very thirsty process; large amounts of water are used for cooling the fibres, which can be a source of environmental contamination and pollution. Energy: manufacturing nylon is a very energy-hungry process, which contributes to environmental degradation and global warming. But, definitely there is the good side to it. Nylon is a plastic that can be recycled. There are several brands and accreditations that can help consumers find more sustainable nylon products. Econyl has developed an eco-friendly nylon made from recycled plastics in a closed loop system, drastically reducing waste and emissions. Nylon may certainly not be great for the environment, but there are plenty of brands working hard to turn that around!

A modular Python toolkit for creating MCP modules tailored to chemical engineering and chemistry workflows.

Interactive STEM Simulation Browser — 247 physics, chemistry, biology, math & engineering simulations. Desktop app (Tauri) + web. Made in Skardu, Pakistan.

Android app for Engineering Chemistry mainly for SPPU portion

A collection of Model Context Protocol (MCP) servers for chemical engineering and chemistry applications, built on top of the powerful MoziChem framework.

ToolboxLab: Python Package for Efficient Chemical Engineering and Chemistry Tasks.

Draco-Py is a library that allows users to solve problems from physics, chemistry, engineering, business, and mathematics. It utilizes the best math and statistics libraries in Python as well as physics-solvers to get solutions for problems in applied science and mathematics. There will also be support for interdisciplinary fields like robotics, quantum computing, artificial intelligence, etc.

In probability theory and related fields, a stochastic or random process is a mathematical object usually defined as a family of random variables. Stochastic processes are widely used as mathematical models of systems and phenomena that appear to vary in a random manner. They have applications in many disciplines including sciences such as biology, chemistry, ecology, neuroscience, and physics as well as technology and engineering fields such as image processing, signal processing, information theory computer science cryptography and telecommunications.

Math, Physics, and Chemistry Engineering Toolkit

This is a repository of chemistry virtual lab and the experiment name is: To prepared phenol-formaldehyde resin and urea-formaldehyde resin.

This repository pertains to chemistry or chemical engineering problems ranging from combustion analysis to materials balance. This is all stuff I write in my free time as a challenge.

Cheat sheet for the lecture Nonlinear Dynamics at the Hamburg University of Technology. Content is mostly from Strogatz, S.H. (2018), Nonlinear dynamics and chaos with applications to physics, biology, chemistry, and engineering. Boca Raton, Fl: Crc Press, Taylor & Francis Group.

Hello! I'm Songqi Cao (曹淞琪) from College of Chemistry and Molecular Engineering, Peking University. The topic of the research I made during my junior student time is machine learning model of 5d-depression of cerium (III). The codes to build up the model and analyze the properties of the system are given in this repository.

Graphixy is a freeware and lighter (140 KB) standalone program designed to get 'x' and 'y' graphical co-ordinates of an image in scientific, engineering & statistical applications and in image data processing. By drawing an image (or) hovering mouse over the pre-loaded image (using Load option), the 'x' and 'y' co-ordinates can be recorded and saved as notepad .txt file The saved data can be exported to Excel spreadsheet and viewed in graph format. Drawn images can be replayed from the recorded notepad (.txt) data file. Data can also be saved in image file (jpeg; .bmp; .gif; .jpg; .png) formats. Image should be loaded with size equal to or less than 625 x 485 (width x height) pixels. For queries, bugs, suggestions and free codes please email to author. Designed by, M Kanagasabapathy PhD, Assistant Professor, Department of Chemistry Rajus College, Madurai Kamaraj University Rajapalayam (TN) India

A VR experience that is developed for first year students in Queen's Engineering to help them learn about Engineering Chemistry as a discipline

The purpose of this project is to learn more about data engineering (API requests, SQL databases and data preprocessing). Using the data a pytorch convolutional network was then trained.

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Artificial Intelligence for Applied Chemistry and Chemical Engineering

Data Science for Chemistry and Engineering Course Page

Code used in Salami et al. 2020 Reaction Chemistry & Engineering

Training methodology and collaboration protocols for multi-agent AI drug discovery — 3 specialized agents (chemistry, protein engineering, quantum chemistry) with 27 skills, validated on an end-to-end IPF/ALK5 campaign.