[permaculture] Online Course: Introduction to GIS: Map your Environment

Andrea S. Laliberte andrea.laliberte at earthmetrics.com
Mon Jan 13 21:55:04 EST 2014


Lawrence,
Regarding your question about the cost of GIS equipment, I think you 
meant GPS equipment, since you mention hand held devices connected to a 
laptop. This course is focused on GIS as in Geographic Information 
Systems, although GPS is often integrated with GIS. Hope that clarifies it.

Andrea



On 1/13/2014 9:00 AM, permaculture-request at lists.ibiblio.org wrote:
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>     1. Quantum mechanics explains efficiency of	photosynthesis
>        (Lawrence London)
>     2. Online Course: Introduction to GIS: Map your	Environment
>        (Andrea S. Laliberte)
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> Message: 1
> Date: Sun, 12 Jan 2014 12:42:19 -0500
> From: Lawrence London <lfljvenaura at gmail.com>
> Subject: [permaculture] Quantum mechanics explains efficiency of
> 	photosynthesis
> To: permaculture <permaculture at lists.ibiblio.org>
> Message-ID:
> 	<CA+j2Q+CA1m1bUs5ksMbyNHGVKknQaqB3pvZworNjz4EzEJNNMQ at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Quantum mechanics explains efficiency of photosynthesis
> http://www.sciencedaily.net/releases/2014/01/140109092008.htm
>
> Quantum mechanics explains efficiency of photosynthesis
> Date:
> January 9, 2014
> Source:
> University College London
> Summary:
>   Light-gathering macromolecules in plant cells transfer energy by taking
> advantage of molecular vibrations whose physical descriptions have no
> equivalents in classical physics, according to the first unambiguous
> theoretical evidence of quantum effects in photosynthesis.
>
> Light-gathering macromolecules in plant cells transfer energy by taking
> advantage of molecular vibrations whose physical descriptions have no
> equivalents in classical physics, according to the first unambiguous
> theoretical evidence of quantum effects in photosynthesis.
> *Credit: ? lily / Fotolia*
>
> Light-gathering macromolecules in plant cells transfer energy by taking
> advantage of molecular vibrations whose physical descriptions have no
> equivalents in classical physics, according to the first unambiguous
> theoretical evidence of quantum effects in photosynthesis published today
> in the journal *Nature Communications*.
>
>
>
>
>
>
>
>   The majority of light-gathering macromolecules are composed of
> chromophores (responsible for the colour of molecules) attached to
> proteins, which carry out the first step of photosynthesis, capturing
> sunlight and transferring the associated energy highly efficiently.
> Previous experiments suggest that energy is transferred in a wave-like
> manner, exploiting quantum phenomena, but crucially, a non-classical
> explanation could not be conclusively proved as the phenomena identified
> could equally be described using classical physics.
>
> Often, to observe or exploit quantum mechanical phenomena systems need to
> be cooled to very low temperatures. This however does not seem to be the
> case in some biological systems, which display quantum properties even at
> ambient temperatures.
>
> Now, a team at UCL have attempted to identify features in these biological
> systems which can only be predicted by quantum physics, and for which no
> classical analogues exist.
>
> "Energy transfer in light-harvesting macromolecules is assisted by specific
> vibrational motions of the chromophores," said Alexandra Olaya-Castro (UCL
> Physics & Astronomy), supervisor and co-author of the research. "We found
> that the properties of some of the chromophore vibrations that assist
> energy transfer during photosynthesis can never be described with classical
> laws, and moreover, this non-classical behaviour enhances the efficiency of
> the energy transfer."
>
> Molecular vibrations are periodic motions of the atoms in a molecule, like
> the motion of a mass attached to a spring. When the energy of a collective
> vibration of two chromphores matches the energy difference between the
> electronic transitions of these chromophores a resonance occurs and
> efficient energy exchange between electronic and vibrational degrees of
> freedom takes place.
>
> Providing that the energy associated to the vibration is higher than the
> temperature scale, only a discrete unit or quantum of energy is exchanged.
> Consequently, as energy is transferred from one chromophore to the other,
> the collective vibration displays properties that have no classical
> counterpart.
>
> The UCL team found the unambiguous signature of non-classicality is given
> by a negative joint probability of finding the chromophores with certain
> relative positions and momenta. In classical physics, probability
> distributions are always positive.
>
> "The negative values in these probability distributions are a manifestation
> of a truly quantum feature, that is, the coherent exchange of a single
> quantum of energy," explained Edward O'Reilly (UCL Physics & Astronomy),
> first author of the study. "When this happens electronic and vibrational
> degrees of freedom are jointly and transiently in a superposition of
> quantum states, a feature that can never be predicted with classical
> physics."
>
> Other biomolecular processes such as the transfer of electrons within
> macromolecules (like in reaction centres in photosynthetic systems), the
> structural change of a chromophore upon absorption of photons (like in
> vision processes) or the recognition of a molecule by another (as in
> olfaction processes), are influenced by specific vibrational motions. The
> results of this research therefore suggest that a closer examination of the
> vibrational dynamics involved in these processes could provide other
> biological prototypes exploiting truly non-classical phenomena.
>   ------------------------------
>
> *Story Source:*
>
> The above story is based on
> materials<http://www.ucl.ac.uk/news/news-articles/0114/090114-Quantum-mechanics-explains-efficiency-of-photosynthesis>provided
> by *University
> College London* <http://www.ucl.ac.uk>. *Note: Materials may be edited for
> content and length.*
>   ------------------------------
>
> *Journal Reference*:
>
>     1. Edward J. O?Reilly, Alexandra Olaya-Castro. *Non-classicality of the
>     molecular vibrations assisting exciton energy transfer at room temperature*.
>     *Nature Communications*, 2014; 5 DOI:
> 10.1038/ncomms4012<http://dx.doi.org/10.1038/ncomms4012>
>
> ------------------------------
>
> *Cite This Page*:
>
>     - MLA<http://www.sciencedaily.net/releases/2014/01/140109092008.htm#citation_mla>
>     - APA<http://www.sciencedaily.net/releases/2014/01/140109092008.htm#citation_apa>
>     - Chicago<http://www.sciencedaily.net/releases/2014/01/140109092008.htm#citation_chicago>
>
> University College London. "Quantum mechanics explains efficiency of
> photosynthesis." ScienceDaily. ScienceDaily, 9 January 2014. <
> www.sciencedaily.com//releases/2014/01/140109092008.htm>.
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 12 Jan 2014 10:49:00 -0800
> From: "Andrea S. Laliberte" <andrea.laliberte at earthmetrics.com>
> Subject: [permaculture] Online Course: Introduction to GIS: Map your
> 	Environment
> To: permaculture at lists.ibiblio.org
> Message-ID: <52D2E39C.1090604 at earthmetrics.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Learn how to map your land using open source software and freely
> available data. Previously offered on CD, this new online version of the
> course is all video-based to allow the student to follow the tutorials
> with ease. The course introduces digital mapping tools and techniques
> (Geographic Information Systems or GIS), and how small landowners and
> permaculture designers can use these tools with freely available data
> for site planning. The course provides an excellent introduction to GIS
> for any small landowner interested in visualizing terrain of the land,
> planning layout of buildings and gardens, and using GIS maps in Google
> Earth. You will learn about freely available aerial photos, topographic
> data, soil maps, and other spatial layers, and how to view and
> manipulate the data using the open source GIS software Quantum GIS.
>
>
> More details about the course at http://www.earthmetrics.com/courses/
>
>
>
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> ------------------------------
>
> Message: 3
> Date: Sun, 12 Jan 2014 14:00:09 -0500
> From: Lawrence London <lfljvenaura at gmail.com>
> Subject: Re: [permaculture] Online Course: Introduction to GIS: Map
> 	your	Environment
> To: permaculture <permaculture at lists.ibiblio.org>
> Message-ID:
> 	<CA+j2Q+BNb_rR24myUnAN29UdZ=UcKNA8saxQPMcBvC+d+oC+AA at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
>
> Thanks very much for posting your updates, Andrea. What is the cost of GIS
> equipment, i.e. the hand held device with usb or firewire connectibility to
> laptop.
>
>
>
> On Sun, Jan 12, 2014 at 1:49 PM, Andrea S. Laliberte <
> andrea.laliberte at earthmetrics.com> wrote:
>
>> Learn how to map your land using open source software and freely
>> available data. Previously offered on CD, this new online version of the
>> course is all video-based to allow the student to follow the tutorials
>> with ease. The course introduces digital mapping tools and techniques
>> (Geographic Information Systems or GIS), and how small landowners and
>> permaculture designers can use these tools with freely available data
>> for site planning. The course provides an excellent introduction to GIS
>> for any small landowner interested in visualizing terrain of the land,
>> planning layout of buildings and gardens, and using GIS maps in Google
>> Earth. You will learn about freely available aerial photos, topographic
>> data, soil maps, and other spatial layers, and how to view and
>> manipulate the data using the open source GIS software Quantum GIS.
>>
>>
>> More details about the course at http://www.earthmetrics.com/courses/
>>
>>
>>
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