Public Laboratory for Open Technology & Science

Public Laboratory for Open Technology & Science

Category: Content
Type: Blog Article

Generated 2 months ago

New blog articles detected

  • What are important aspects to consider about replication on the website and in the community?

    Hi folks! i'm posting this as a question because in conversation over the past week, many people have already contributed many perspectives on this topic, ranging from the scientific validity side, to the education and onboarding experience, the design of the web interface, and more. Please add your perspective as an "answer"! Thank you.

  • Can I upgrade a DIY spectrometer with a Raspberry Pi camera?

    What I want to do or know I've seen some of the really great work by @cristoforetti and the #webvalley group -- which I was lucky enough to help a bit on -- to build a version of our spectrometry kits around the camera from a Raspberry Pi mini computer board. I'd like to think about how this could be done in a standard Desktop Spectrometry Starter Kit, as an upgrade -- or with a foldable mini-sp...

  • What sensor would I need to detect spectra of small organisms (virtus, bacteria etc)

    What I want to do or know What CCD sensor (or other sensor?) that could be used to detect the spectra of very small organisms such as bacteria or viruses? Background story I'm trying to set up a cheap experiment to look at the transmission spectrum of viruses or bacteria, but not sure which sensor would be useful for this purpose? Since you guys have a DIY kit available, I thought you might kno...

  • Ambient Light Reflection Suppression

    I have used an automotive type flat black rust paint which is available locally and comes as a spray can application or in a 237ml can for brush. Also have completed upgrades as suggested originally by @stoft with some modifications to suit my purpose one of which I tapped a 13/64" - 5,16mm hole with a 1/4-20 tpi thread to mount the spectrometer onto a tripod. Also I used some flat black cardstoc...

  • MapKnitter map of uncc map

    Spatial Thinking https://mapknitter.org/embed/uncc-map--8

  • What goes into choosing a topic name?

    _above: sketch of figuring out how to organize "air" into a research area, and which methods are part of the research area, and which activities would go on what grid..._ We've been having some fun discussions over the past couple months with people on each of the topical lists about what to name the new "top-level" pages where we're organizing. That means -- when posting activities, do they end...

  • Balloon mapping images as a way to explain life in a refugee camp

    In August 2016, I went to [ZKU](http://www.zku-berlin.org/) in Berlin for 10 days to present the work we have been doing in Bourj Al Shamali camp, but also to learn how to use mapstitcher and work with Claudia on the next steps on the project. As the internet connection in the camp is very bad, having the opportunity to work together in one computer made everything more easy. In addition, we als...

  • Air-Crafting: Teaching Atmospheric Attunements with Plant Air Purifiers in Davis, California

    ##Background Tim Choy and Jerry Zee worked on replicating the[ DIY plant remediation kit](https://publiclab.org/notes/nshapiro/09-26-2016/build-a-plant-based-air-purifier) as an activity for an undergrad seminar at UC Davis called STS180: Air-Craft. The class used crafting exercises as a way of approaching and thinking through a number of questions about bodies, exposures, mediums, and life in th...

  • Document your hardware upgrades at Parts & Crafts Documentation Days - Oct 12 & 19

    With all the great progress on our new [Activities system](/tag/activity-grids), folks are [starting to upgrade their starter kits](https://publiclab.org/tag/upgrade:*), especially the [Desktop Spectrometry Starter Kit](https://publiclab.org/wiki/desktop-spectrometry-kit-3-0) (see [below](#Upgrades) for a list of posted upgrades!) So in conjunction with [OSHWA's Documentation Days](http://www.os...

  • MapKnitter map of Prairie Island Penstemon Pole Mapping 2

    Pole Mapping of Prairie Island Penstemon: Trial Two Difficulties: maintaining consistent angle (resolved with scotch semi-rigid computer wiring), perspective (solution planning with stake placement and practice shots), lighting (later day provided for better lighting except with sun at back, resolved by adjusting flash and aperture), scale (familiarizing with mapping tool) Technique: imaging from...

  • How can i know if my plant-based air filter is working?

    I am planning on making https://publiclab.org/notes/nshapiro/09-26-2016/build-a-plant-based-air-purifier, and i'm wondering how i can know if it's even doing anything to improve my indoor air quality?

  • Build a plant-based air purifier

    #Remediation Domestic chemical ecologies have both many toxicant sources and many toxicant sinks. Formaldehyde slowly and silently off gasses from engineered woods, carpets, and permanent press clothing. Some of these silent emissions waft out open windows. Others are absorbed by human bodies or the bodies of companion species. Others still are metabolized by decorative indoor plants and the mic...

  • PET Bottle & Rubber Band Rig wiki page as research note

    This research note is a copy of the [PET Bottle Rig Wiki page](/wiki/pet-bottle-rubber-band-rig). This page replaces the [Soda Bottle Rig](http://publiclaboratory.org/wiki/soda-bottle-rig). The PET bottle rig has two components-- the modified bottle and a rubber band harness for the inside. Small construction details differ for phones, small cameras, and large cameras which are explained in t...

  • Event: Citizen Science Gathering in West Virginia

    [![unnamed.jpg](//i.publiclab.org/system/images/photos/000/018/134/large/unnamed.jpg)](//i.publiclab.org/system/images/photos/000/018/134/original/unnamed.jpg) Exciting to see this conference come together! @GretchenGehrke will be presenting! * Thread about ridesharing from the Triangle, NC, here: https://groups.google.com/forum/#!topic/plots-southeast/HIxGKpDA3Iw * Facebook event page: https:/...

  • All Paper-n-Tape Mock-Up Upgrade of PLab 3 Spectrometer

    **Abstract** From discussion with @abdul of PLab Kits, it appears there is an opportunity for improving a "paper and tape" only mechanical assembly for the [PLab 3 basic design](https://publiclab.org/wiki/desktop-spectrometry-kit-3-0). If the present mixed paper, tape, velcro and wood design could be simplified (and, perhaps, add a litle improvement to stability) the revised kit might find a low...

  • Reduce interior reflections in your spectrometer with black ink

    ### Goals After building the [stability upgrade][1] to the [Desktop Spectrometry Starter Kit][2], I needed to darken the exposed wood surfaces to reduce reflections and ambient light inside the spectrometer, which could affect the spectra we collect. In [this question][3], I posed some possibilities for darkening the inside, and although there are some other promising options, I thought I'd ...

Public Laboratory for Open Technology & Science

Category: Content
Type: Blog Article

Generated 2 months ago

New blog articles detected

  • MapKnitter map of Prairie Island Penstemon Pole Mapping 1

    Pole Mapping of Prairie Island Penstemon: Trial One Difficulties: maintaining consistent angle (resolved with scotch tape temporary), perspective (solution planning with stake placement), lighting (full sun/ glare), scale (familiarizing with mapping tool)Technique: images from 2 on site (further proximity from focal point than previous)Overall Goal: Identify Plant species, monitor growth overtim...

  • Pearl River Monitoring in Guangzhou

    ###What I want to do I paddle every week with Guangzhou International Dragon Boat Club in Pearl River. The water quality is very bad, and is classified as "-V" according to Chinese Surface Water Standard, which means it does not have any function other then shipping. But we have to practice every week here, since there are no other options for us. We want to record the water quality changes, and ...

  • Can we use a timelapse or video camera to monitor particulate air plumes?

    We've been reading about ASTM D7520, or the Standard Test Method for Determining the Opacity of a Plume in the Outdoor Ambient Atmosphere, which is also known as EPA's alternative Method 82. Method 82 is an alternative to Method 9, which is where people can get certified at "Smoke School" ( #smoke-school ) to use their own eyes in a carefully designed methodology to observe and report plumes. A l...

  • Zero dark thirsty: Capturing replenishing nighttime rain events with a trail camera

    *Above: LEAFFESTers observing the deployment of a trail camera (arrow) near a small stream.* Jeff brought a new trail cam to [LEAFFEST](https://publiclab.org/tag/leaffest2016) to see how it worked for [monitoring streams](https://publiclab.org/questions/stevie/09-06-2016/question-has-anyone-used-a-timelapse-camera-in-stream-monitoring). There are many potential uses of this type of camera for do...

  • Kite Aerial Remote Sensing (KARS) - Thermal Infra-Red.

    In 2013 [we](http://westlothianarchaeology.org.uk/) formalised our donations of aerial photography equipment by setting up the [Scottish National Aerial Photography Scheme](http://armadale.org.uk/snaps.htm). Our initial donations, starting in 2009, consisted mainly of [cameras with poles](http://www.armadale.org.uk/pole.htm). Our aim has been to introduce students of all ages, primary school to P...

  • Building the @stoft stability upgrade for Desktop Spectrometry Starter Kit 3.0

    [![build](https://i.publiclab.org/system/images/photos/000/018/075/medium/IMG_20160918_114553.jpg)](https://i.publiclab.org/system/images/photos/000/018/075/original/IMG_20160918_114553.jpg) ## Build attempt At #leaffest-2016, Molly DeBlanc and I followed the instructions and photos @stoft posted, which were really easy. @cfastie lent me some wood and it was simple to cut and sand 5 blocks and ...

  • Landfill leachate in Louisiana ditches?

    ###Event details Let's take water samples in the Plaquemines ditches on Woodlands Hwy, and discuss how to use public lab tools to investigate water pollution. When, where, what Saturday, September 24th, 2016 12pm Central 449 F. Edward Hebert Blvd., Belle Chasse, LA 70037 504 484 9599 (scott's google number) Sampling with bell jars and aluminum foil Field screening with spectrometry Later--...

  • How can I reduce ambient light inside the Desktop Spectrometry Starter Kit?

    Especially with the [new stability upgrades being explored][1], I wanted to look at different ways to reduce reflected and ambient light leaking and into and reflecting around the inside of the spectrometer box, because that makes high baseline noise when we capture spectra. (Note that this is not a question about [noise over time][2], like where a pixel can vary in brightness randomly -- a sepa...

  • See the Fraunhofer absorption lines in sunlight

    _This is a draft -- still in progress, based on [this note](https://publiclab.org/notes/cfastie/3-2-2013/fraunhofer)_ I'm still working on: * a graph of replications (could be added later) * references, from https://publiclab.org/wiki/spectrometer-curriculum **** ## Goals One thing spectrometers can be used for is to detect gases, but an experimental setup for this is actually pretty hard, b...

  • Build a Coquí: A Simple Water Conductivity Sensor

    ##This is a beginner's guide to assembling the Coquí The Coquí is a simple water conductivity sensor designed by @donblair that is designed for use in an educational context. The coquí is a simple circuit assembled on a breadboard that has a speaker that outputs high frequency sound when the water conductivity is higher and lower frequency sounds when the conductivity is lower. _This post, ori...

  • What makes a good activity?

    In our continuing shift towards using the new Q&A feature and the new Activity grids as a framework for collaboration on [PublicLab.org][1], we're encouraging people to post their work more in the spirit of [Instructables.com][2] -- "showing each other how to do something" rather than just telling people about something you've done. This shifts the emphasis from solely documenting what you've don...

  • Draft Meta-Riffle Part 2: All about pins

    ###What I want to do * Continue where [Part 1](https://publiclab.org/notes/pdhixenbaugh/09-15-2016/draft-don-t-look-meta-riffle-researching-how-to-build-electronic-circuits-with-the-riffle) left off, exploring Riffle and Arduino documentation * Part 3 will be building the physical circuit. * Clean up all parts in the series with final editing. ###A primer on pins Looking at the example sketches ...

  • Is there a water quality equivalent of Smoke School, the EPA air pollution observer certification?

    What I want to do or know Folks have been really interested in monitoring water quality visually -- through photos or direct visual observing. @liz and @mathew posted some resources on Smoke School (#smoke-school): Mathew: Is visual observation effective means of reporting air pollution to the EPA? have their been successes using the EPA visual assessment standards? @gretchengehrke found a 1993 ...

  • Stability upgrade mockup for PLab Spectrometer 3.0

    **Abstract** The [PLab 3.0 Spectrometer](https://publiclab.org/wiki/desktop-spectrometry-kit-3-0) is an entry-level device which allows viewing a visual-light spectrum. However, in keeping costs minimal for the user, some of the materials and construction techniques do not provide sufficient mechanical rigidity. This note describes a few simple, low-cost changes to substantial improve mechanical...

  • What's the best way to archive/store a timelapse video?

    As folks are looking at #timelapse photography as a means to document environmental problems like water contamination, I've heard people ask what's the best way to store these images (or often videos) We'll be testing a hunting camera at LEAFFEST 2016 and will post our video to YouTube for starters. But are there chain of custody steps we should take? I've seen people using #method82 -- a timela...

  • Is CALPUFF a good air quality modeling tool

    Anybody knowledgeable or experienced in using CALPUFF for particulate monitoring, or other air quality issues? Second, will the EPA accept CALPUFF models of particulate dispersion? Recently, Gretchen G. posted that the EPA's AERMOD modeling, which is used in air quality permits, was not good because it ignored the conservation of mass. Gretchen, please correct anything that I got wrong or left ou...

  • Don't know how to use DIY Plant Analysis Webcam

    Guys i've just bought a DIY Plant Analysis Webcam form Infragram and I don't really understand how to make it work. I've plugged the USB and the driver has been installed, but when I go to http://infragram.org/sandbox/ and clic on "connect to a camera" it just says that there are no cameras available. Could you help me find the way to make it work?

  • What mechanical specs can and should PLab spectrometers meet?

    Mechanical design directly affects stability and, in the case of a spectrometer, stability is mandatory because the fundamental measurements are based on optics and the dimensions related to the wavelength of light. Designing the materials and details of the platform and housing without first establishing the stress requirements is approaching the problems in reverse. Eg: If the product needs to ...

  • First draft of tag graph

    @bsugar used Gephi to make this tag graph of the top 256 tags used on PublicLab.org. * If there are 10 or more co-occurrences of pairs of tags, they get a line drawn between them; the thicker the line, the more co-occurrences. * Different colors indicate closely associated tags, referred to as "communities". There are ~15 "communities" shown here. Benjamin tested a range of numbers, this was th...

  • (Draft, don't look) Meta-Riffle: Researching how to build Electronic Circuits with the Riffle

    Draft -- may contain stream of consciousness -- not ready for primetime, but feel free to look at the work in progress. ###What I want to do - gather resources for programming the riffle - learn where resources for the riffle are located - build a breadboard circuit that lights up an LED - share the discovery and learning process The Riffle-beta came with two protoboards - designed to help make...

Public Laboratory for Open Technology & Science

Category: Content
Type: Blog Article

Generated 2 months ago

New blog articles detected

  • Question: How to analyze an upload image file by using Spectral Workbench ?

    What I want to do or know By deafult, the picture captured by Web camera is analyzed by the Spectra WorkBench application. Instead of using the living picture, I need to analyze a picture captured by my iphone. After uploading this picture, I do not know the next step for analyzing the spectrum of this picture ( as the default setting for living picture). Please help! Many thanks! Background st...

  • vineyard spectral photos

    [![IMG_0971.JPG](//i.publiclab.org/system/images/photos/000/018/033/large/IMG_0971.JPG)](//i.publiclab.org/system/images/photos/000/018/033/original/IMG_0971.JPG) i started to study the water content, LAI, and building a big data for machine learning for forecasting diseases and weather so far i gather lots of photos that i still need to process **you can view some of them **[**HERE**](http...

  • Laser Calibration (532nm) of New DVD Diffration Grating 4.7 GB

    ##**Resolution and Calibration for the DH 4 v4a Spectrometer** I replaced the DVD diffraction grating for my spectrometer in order to get a more balanced spectral resolution that the JDEPC-OV05 cmos camera can easily process @ its pixel specifications, also I believe with further testing, it will help, since I cannot control exposure time, only gamma correction with Spekwin32. The new ruling ...

  • Comparing The Ebert CFL Spectral Image To the DH 4.0 v4 CFL Spectral Image

    [![cfastie_cfl_cal_march_2013_PNG_and_mine__sept_10.png](//i.publiclab.org/system/images/photos/000/018/010/large/cfastie_cfl_cal_march_2013_PNG_and_mine__sept_10.png)](//i.publiclab.org/system/images/photos/000/018/010/original/cfastie_cfl_cal_march_2013_PNG_and_mine__sept_10.png) references http://publiclab.org/notes/cfastie/2-19-2013/ebert http://publiclab.org/wiki/dh-4-0-v4-spectrometer-bu...

  • A Near Perfect CFL (compact fluorescent light) Calibration

    I had to run another slit width test verification, so I used Plab's spectral workbench 2.0 online to do a CFL calibration to get a resolution image of my 0.06mm slit width. [![CFL_cal_sept10_test002.png](//i.publiclab.org/system/images/photos/000/018/005/large/CFL_cal_sept10_test002.png)](//i.publiclab.org/system/images/photos/000/018/005/original/CFL_cal_sept10_test002.png) [![CFL_cal_PLAB_fit...

  • Empirical Verification Of Slit Width For The DH4.0 v4 Spectrometer Section II

    ##**Verification through quality control check procedures** Using my Premeire Professional binocular microscope, I verified my new slit template and design. The razor blades are now mounted on a piece of polycarbonate for strength and rigidity, which upon microscopic inspection reveals that indeed, both edges appear horizontal in respect to their positions. Exact measurements are noted on the...

  • Particle Electron

    ###New Hardware, yay I just got my hands on one of the [Particle Electron](https://www.particle.io/) prototyping kits. The Particle Electron is a cellular 3g (yes, actually 3g) prototyping board which speaks the Arduino language and talks to the internet over a cellular data connection. It is however, categorically different from all the other cellular solutions for capable hobbyists. ###How is...

  • Dendrometers!

    ###Background I've been doing work for the University of Alaska Fairbanks for the past few months working on new sensor and datalogger systems for a tree physiology and ground water project. I'm developing a system of Dendrometers, which are sensors that measure tree diameter. I'm not as eloquent about what exactly this measurement tells us as the science scientists are, but it has to do with fi...

  • Empirical Verification Of 0.05mm Slit Width of DH4.0 v4 Spectrometer

    ##**Understanding Spectral Bandwidth and Resolution in the Regulated Laboratory** Upon closer scrutiny of my microscopic view of the 0.05mm slit width, I realized that the edges did not meet. This caused me great concern, although the measurements are correct as far as pixels go, on the title picture, (measuring from the razor's edge to the shadow of the lights edge from the bottom razor blade...

  • 0.05mm Slit Gillette Utility Knife Razor Blade design 100X Magnification

    This is actually a follow up on my previous post on the two laser scans using the new 0.05mm slit width. I wanted to verify the width using my microscope, since the image capture program, AMScope has a pretty awesome measurement feature, also this is the first time I have used it with the measurement feature layered on the image itself, and didn't realize I could export it to Excel. This made li...

  • The many types of evidence

    As a followup to our [introductory post](https://publiclab.org/notes/warren/08-18-2016/introducing-the-environmental-evidence-project-a-blog-series-from-public-lab), Gretchen and I wanted to explore the many different types of evidence, and talk about their differences, even before getting into the legal definitions and ramifications. Whether you're taking a photo, reading data from a sensor, or ...

  • Collaboratively generating more knowledge: Public Lab’s approach to citizen science

    _[Blog Crosspost from: www.https://creativecommons.org](https://creativecommons.org/2016/09/07/collaboratively-generating-knowledge/)_ By [Jennie Rose Halperin](https://creativecommons.org/author/jenniecreativecommons-org/) September 7, 2016 Citizen science is the powerful idea that communities should be empowered to participate in the process of scientific inquiry, investigating the world a...

  • New Laser Testing Using a 405nm UV laser Pointer and a 532nm Portable Green Laser

    ##**New testing on a 0.05mm Gillette razor Blade Utility Knife Open-Air Slit (based on my previous design.)** I wanted to see just how much more resolution I could squeeze out of this spectrometer, so I remove the 0.09mm Gillette razor blade slit and redid the design with a pair of Gillette utility knife razor blades. This took me about two hours to get it perfect but I got it right, now I hav...

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