Mackenzie Cowell › Comments

10 uM voxels, based on 100nm bandwidth of infrared illumination. - Mackenzie Cowell

ine we have some lenses inside the microscope, that focus light from the focal point of one lens to another point. This is represented by the blue rays of light in the above picture. The red rays of light represent light from another point in the sample, which is not at the focal point of the lens, but which nonetheless get imaged by the lenses of the microscope. (Note that the red and blue rays in the picture are meant to distinguish the two sets of rays, but they aren't meant to be different wavelengths of light.) The image of the red point is not at the same location as the image of the blue point. (You may remember this from introductory optics, perhaps you have seen a formula such as 1/s + 1/s' = 1/f for locating the image formed by a lens. Points don't need to be at the focal point of the lens in order for the lens to form an image.) - Mackenzie Cowell from Bookmarklet

"Optical Projection Tomography as a Tool for 3D Microscopy and Gene Expression Studies James Sharpe,* Ulf Ahlgren, Paul Perry, Bill Hill, Allyson Ross, Jacob Hecksher-Sørensen, Richard Baldock, Duncan Davidson Current techniques for three-dimensional (3D) optical microscopy (deconvolution, confocal microscopy, and optical coherence tomography) generate 3D data by "optically sectioning" the specimen. This places severe constraints on the maximum thickness of a specimen that can be imaged. We have developed a microscopy technique that uses optical projection tomography (OPT) to produce high-resolution 3D images of both fluorescent and nonfluorescent biological specimens with a thickness of up to 15 millimeters. OPT microscopy allows the rapid mapping of the tissue distribution of RNA and protein expression in intact embryos or organ systems and can therefore be instrumental in studies of developmental biology or gene function." - Mackenzie Cowell from Bookmarklet

"iphone 4 screen magnified by PS3eye w/ inverted lens 3088 x 2312 uM = 3.088 x 2.312 mm 640 x 480 pixels 326 ppi 4.25 x 3.18 cm 4.25 cm / .03088 cm = 137.63 3.18 cm / .02312 cm = 137.63" - Mackenzie Cowell from Bookmarklet

"M12 Lens Mount Product Code: LM-M12-PS3 Description: The LM-M12-PS3 is a mount designed to fit the LE-M12-18 and LE-M12-19 lenses with a quarter inch CCD. Its construction is from high grade ABS plastic. The spacing on the mounting holes is compatible with the PS3eye camera." - Mackenzie Cowell from Bookmarklet

"CMT107 Lens holder, M12x0.5, 15.5, centered M12x0.5 Yes 15.5 $6" - Mackenzie Cowell from Bookmarklet

"The UI-1646LE is an extremely compact board-level camera with modern Aptina CMOS sensor in 1.3 Megapixel resolution (1280x1024 pixels). Through the use of the widespread USB 2.0 technology the camera can be interfaced with a vast variety of systems without problems. The UI-1646LE features an S-mount lens holder with M12 thread and integrated filter glass." - Mackenzie Cowell from Bookmarklet

"Compact color USB cameras, the uEye LE series, have 3 Mpixel resolution. Available as board-level models with S-mount lens connection, the 1466LE-C and 1467LE-C versions are 36 × 36 × 20 mm and weigh 12 g. The USB 2.0 port is on the side of the camera to allow integration with minimum space and depth requirements. The cameras feature a CMOS sensor with rolling shutter and an IR filter. The 1466LE version has an S-mount connector with an M12 thread, the 1467LE model comes with an M14 adapter. IDS Imaging Development Systems Obersulm, Germany www.ids-imaging.de" - Mackenzie Cowell from Bookmarklet

"De advantage of dark field illumination is that normal almost invisible features in an object (scratches of embossing) will due to interruptions in reflection appear very bright in the image." - Mackenzie Cowell from Bookmarklet

Sells for $449 - Mackenzie Cowell from Bookmarklet

it's great for lightweight event management - Mackenzie Cowell from Bookmarklet

"Young scientists at a Chinese genomics institute are foregoing conventional postgraduate training for the chance to be part of major scientific initiatives. Is this the way of the future?" - Abhishek Tiwari from Bookmarklet

@Anthony you said you were going to the library to make photocopies??? - Steve Koch

"The purpose of OpenChemistry is to make chemistry learning content free, open and available to the world with the aim of creating a community of educators, students and lifetime learners who are interested in producing and consuming original content in chemistry All work by openchemistry is licensed under a Creative Commons Attribution 3.0 United States License, which means that you are free to use and modify it for any purpose. All we ask is that you include a link back to openchemistry in your credits." - Mackenzie Cowell from Bookmarklet

Although there seems to be a spam entry on Tue first page that has been there since August... - Cameron Neylon from Android

looks like my lectures are still there :) http://openchemistry.co.uk/... - Jean-Claude Bradley

"Standard Virtual Biological Parts: A Repository of Modular Modeling Components for Synthetic Biology." - Mackenzie Cowell from Bookmarklet

Branching Morphogenesis explores fundamental processes in living systems and their potential application in architecture. The project investigates part-to-whole relationships revealed during the generation of branched structures formed in real-time by interacting lung endothelial cells placed within a 3D matrix environment. The installation materializes five slices in time that capture the force network exerted by interacting vascular cells upon their matrix environment. The time lapses manifest as five vertical, interconnected layers made from over 75,000 cable zip ties. Gallery visitors are invited to walk around and in-between the layers, and immerse themselves within an organic and newly created "Datascape" fusing dynamic cellular change with the body and human occupation, all through the constraints of a ready-made. - Mackenzie Cowell from Bookmarklet

Download free courses & lectures from some of the world’s leading universities, including Stanford, Yale, Berkeley, MIT, Oxford, Harvard and others. - Mackenzie Cowell from Bookmarklet

MIT OCW seems to cover a wide range of subjects, and with reasonable depth - Mike Chelen

"BuddyPress will add a social networking layer to a new or existing installation of WordPress MU. BuddyPress is a suite of WordPress plugins and themes, each adding a distinct new feature. BuddyPress contains all the features you’d expect from WordPress but aims to let members socially interact" - Mackenzie Cowell from Bookmarklet

"The stuff I hacked together tonight only accomplishes one task: A WordPress install can push content into MindTouch Deki and maintain the data association between the Deki page and the WordPress page. Obviously, the second part of this is MindTouch Deki pushing data back into Wordpress - unfortunately this type of functionality doesn't quite exist inside Deki yet, so that part will be harder to accomplish. WHY IT'S AWESOME It. Just. Works. No updates necessary for Deki - the APIs I used exist in very old versions of Deki ... which means it'll work on Wik.is! It adds wiki functionality to your blog - each blog edit gets stored in the wiki - you can always go there and revert changes and see what's happening! And all you need to do is install a friggin' WordPress plugin! Unless your wiki engine stores in XML (XHTML), you can't do this without writing a Wordpress XHTML -> Your-custom-markup-language ... Deki can. Sucks for you, MediaWiki!" - Mackenzie Cowell from Bookmarklet

One might reasonably ask why, if the Sac State 8008 was such an advanced machine for its time, no one knows about it? The reason, Damer concluded, is that it would have been extremely expensive to replicate, largely because of the PROMs. That, plus the fact that the machine was built in a public university lab for a specific purpose, and not by private hobbyists looking to make a splash, likely led to its anonymity and eventual disappearance into someone's dusty basement." "...hobbyists were looking for a computer they could mess around with and modify to their hearts' content. And that's why the Altair, which came either as a kit or as an assembled machine with nothing but memory, became such a hit." - Mackenzie Cowell from Bookmarklet

"The current state of the art in nanopropulsion devices was recently reviewed by Ebbens and Howse in an article last Friday.[SoftMatter] A short summary of the nano- systems is presented below with video action shots when I could find them." - Mackenzie Cowell from Bookmarklet

# Autoclaves or sterilizers are vessels that use pressurized steam to eradicate micro-organisms. # Their purpose in the microbiology laboratory is either to prepare culture media, reagents and equipment # or for decontaminating biohazardous waste materials. - Mackenzie Cowell from Bookmarklet

"The McWire Cartesian Bot is a 3 axis cartesian robot designed for light milling, additive 3D printing, laser cutting / etching, and pen plotting. The design strategy has focused on ease of construction, maintenance, and operation. We also tried our hardest to minimize cost while providing a robust 3D positioning system. The result is a machine that provides smooth, high quality motion while keeping costs under $250. We hope you enjoy this project as much as we have." - Mackenzie Cowell from Bookmarklet

referenced from Massimo Banzi's "Getting Started with Arduino" - Mackenzie Cowell from Bookmarklet

Now it's easy to position sensors, automate pick-and-place operations or perform light-duty machining. Our X and XY series belt-driven positioners are the perfect alternative to traditional lead-screw driven systems. The low-stretch timing belt provides an incredible 1/100" accuracy (twice the thickness of a sheet of paper) at speeds rivaling lead-screw models. - Mackenzie Cowell from Bookmarklet

"We're making progress with hardware kits that will soon (maybe early Q2 2010?) be available for purchase. The idea is to use laser-cut acrylic panels and mostly off-the-shelf hardware (there will only be a couple of custom circuit boards, and one gear has to be custom-bored) to provide simple kits for the DIY motion control enthusiast to build their own systems without heavy investment in tooling and without having to focus on all of the fundamentals. In such a world, you could create new software, or just get out and shoot without first buying expensive CNC machines, or have to figure out yet one more way to come up with that right gear ratio." - Mackenzie Cowell from Bookmarklet

Science Channel president Clark Bunting told reporters Tuesday that his cable network was "completely incapable" of watering down science any further than it already had." - Mackenzie Cowell from Bookmarklet

Love the techno-grunge photo illustration style of Alex Varanese. What would he make for diybio? - Mackenzie Cowell from Bookmarklet

a designer recommended by Mike Kus - Mackenzie Cowell from Bookmarklet

I love this kind of design, hand-drawn, indy - Mackenzie Cowell from Bookmarklet

This item is part of the gel drying system (Cat# 408501 and 408503) that allows gels to dry quickly and easily between two sheets of cellophane without the use of expensive heat/vacuum gel dryers. - Mackenzie Cowell from Bookmarklet