Wednesday, March 12, 2008 

The Blissful Body of the Yogi(ni): Yidam Practice & Yoga Asana

Khenpo Tsultrim Gyamtso Rinpoche, a Tibetan yogi often compared to the great Milarepa, when addressing the issue of Yidam practice within the Vajrayana vehicle of Tibetan Buddhism, has said: It is the blissful body of the yogi or yogini that is the true Deity. So what might this mean? And how, if at all, is it (or could it be) related to the practice of Yoga asana? Lets explore

Yidam practice unfolds in two stages: (1) The generation or creation Stage, in which the specific deity that one is working with is created, i.e. given a form within the imagination of the practitioner; and (2) The Completion Stage, in which that created form of the deity is dissolved: resolved into emptiness, and (its residue, its true intelligence) light/radiance. The practice also, over time, evolves from one in which the deity is merely a conceptual projection, to one in which the natural deity appears, non-conceptually, before the practitioner, as a visible aspect of his/her own radiance.

Yidam practice as a whole is based, in large part, upon a productive use of the imagination. It takes that capacity (and strong tendency) most of us have to make mental pictures, and uses this as a tool to align us with, open us to, a reality that is deeper, more profound, and truer than the one were habitually tuned into. The imagined forms of the deities have the quality of being able, potentially, to act as portals, or gateways into these deeper realities to put us in touch, directly, with aspects of awakened mind.

Now its important to notice the distinction between ~ on the one hand ~ this Yidam-practice way of using our imagination (as a very specific form of mental training, which ultimately can liberate us), and ~ on the other hand ~ a use of the imagination which amounts to no more than (habitual, and often largely unconscious) fantasizing. To engage in fantasy is ~ from the perspective of Buddha dharma ~ a non-productive use of the imagination: one that takes us further into the territory of conceptualization, mental elaboration, and as such further and further away from a reality which has the potential to liberate us.

So how does any of this relate to the practice of Yoga asana? We could, first of all, consider each specific asana as a deity-form: something we construct/project (a la the creation Stage) and then dissolve (a la the Completion Stage). And certainly asana practice is based largely upon a distinction between productive and non-productive alignments/uses of the body. The productive alignments (a la the productive uses of mental imagination) are those which have the potential to open us into a reality deeper than the mere physical, e.g. to the level of the Central Channel/Shushumna Nadi, and the subsequent conscious flow of that awakened energy outward, into the whole network of nadis within the subtle body of the yogi or yogini. The non-productive alignments (a la fantasies), on the other hand, simply keep the energy of our subtle bodies circulating unconsciously (divorced from the truth of the Shushumna Nadi) in old samskaric patterns, i.e. keep us circling on the wheel of bith-and-death which in Buddhism is called Samsara.

And in the same way that in deity practice there is an evolution from the deity as a mere conceptual projection (though a potentially productive one!) to the non-conceptual appearance of the natural deity; just so in our asana practice we often begin with a rather outside-in approach, in which the asana is actually a form of conceptual projection, i.e. its an idea we have (from our teacher, or books, or whatever) that we put forth in the form of an arrangement of (the appearance of) bones, muscles, etc. but its not yet real or natural. As our asana practice matures, more and more were able to work from the inside-out, in which the asanas emerge spontaneously, non-conceptually, as aspects of our natural intelligence/radiance. Our movements in and out of the asanas are infused with the spirit of what in Taoism is called Wu Wei: an effortless effort which quite naturally produces the correct alignments (as opposed to imposing those alignments based upon some external moral code of asana practice).

So how then do we progress from a conceptual to a natural way of expressing our asana practice? From the poses as mere conceptual projections to expressions of an awakened bodymind? A practitioner of the generation Stage of Yidam practice might move in this direction by finding the Completion Stage within the creation Stage, by finding the dissolution of the form as an inherent aspect of the form itself (much as ~ in taoist theory/practice ~ Yang is an inherent aspect of Yin: they inter-are). In this same way, our asana practice might re-member the dissolution of form within every form/asana taken. And might ~ to extend the principle ~ put into conscious and ever-evolving relationship all opposing movements So little by little our ideas about the right way to do the pose are replaced by an ever-more-subtle tremoring which spontaneously aligns us in a way that allows our conceptually projected body to dissolve into the blissful body of the deity: an aspect of our own radiance, pouring forth, shedding itself continuously, for the benefit of all living beings.

One of the initial trainings in Dream Yoga ~ once the practitioner is able to be lucid (i.e. awake) within the dream ~ is to transform the body: to change the shape of ones body into the body of a bird; into an airplane (and fly to Paris!); or ~ relevant to our current exploration ~ into the shape of a deity, which ~ in the context of dreaming ~ is quite easy to experience and understand as being an empty form, i.e. a form made only of color, light & energy (much like a rainbow). In this same way, our vinyasa ~ our movement in and out of asanas, upon the thread of our awakened breath ~ might become, with practice, a kind of Rainbow Painting (Ive borrowed the phrase from a book with this same title written by Tulku Urgyen Rinpoche): merely a play in color, light and energy, a toggling back and forth between the display of empty forms (the specific asanas), and the bliss which is the residue of their dissolution.

And this, perhaps, represents ~ simultaneously ~ the waking up of the dream of our asana practice, and the waking up of the dream of our Yidam practice; represents the waking up from the dream/fantasy of religious practice into the blissful radiance of the Present Moment Amen and Sobeit.

Elizabeth Reninger has been exploring yoga ~ in its Hindu, buddhist & taoist forms ~ for more than twenty years, and is a student of Richard Freeman and Dzogchen Ponlop Rinpoche. She is also a published poet, and currently resides in Boulder, colorado. For more essays on yoga-related topics, please visit her website at: http://www.writingup.com/blog/elizabeth_reninger

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How Do PID Controllers Work: Application & Theory

What is a PID controller?

A PID (Proportional Integral Derivative) controller is a common instrument used in industrial control applications. A PID controller can be used for regulation of speed, temperature, flow, pressure and other process variables. Field mounted PID controllers can be placed close to the sensor or the control regulation device and be monitored centrally using a SCADA system.

Example: Temperature control using a Digital PID controller

A typical PID temperature controller application could be to continuously vary a regulator which can alter a process temperature. This may be a pulsed switching device for electrical heaters or by opening and closing a gas valve. A heat only PID temperature controller uses a reverse output action, i.e. more power is applied when the temperature is below the setpoint and less power when above. PID control for injection and extrusion applications often employ additional cooling control outputs and usually require multiple controllers.

A PID controller (sometimes called a three term controller) reads the sensor signal, normally from a thermocouple or RTD, and converts the measurement to engineering units e.g. Degrees C. It then subtracts the measurement from a desired setpoint to determine an error.

The error is acted upon by the three (P, I & D) terms simultaneously:

PID controller Theory

The following section examines PID controller theory and provides further explanation of the question `how do PID controllers work'.

Proportional (Gain)

The error is multiplied by a negative (for reverse action) proportional constant P, and added to the current output. P represents the band over which a controller's output is proportional to the error of the system. E.g. for a heater, a controller with a proportional band of 10 deg C and a setpoint of 100 deg C would have an output of 100% up to 90 deg C, 50% at 95 Deg C and 10% at 99 deg C. If the temperature overshoots the setpoint value, the heating power would be cut back further. Proportional only control can provide a stable process temperature but there will always be an error between the required setpoint and the actual process temperature.

Integral (Reset)

The error is integrated (averaged) over a period of time, and then multiplied by a constant I, and added to the current control output. I represents the steady state error of the system and will remove setpoint / measured value errors. For many applications Proportional + Integral control will be satisfactory with good stability and at the desired setpoint.

Derivative (Rate)

The rate of change of the error is calculated with respect to time, multiplied by another constant D, and added to the output. The derivative term is used to determine a controller's response to a change or disturbance of the process temperature (e.g. opening an oven door). The larger the derivative term, the more rapidly the controller will respond to changes in the process value.

Tuning of PID controller Terms

The P, I and D terms need to be "tuned" to suit the dynamics of the process being controlled. Any of the terms described above can cause the process to be unstable, or very slow to control, if not correctly set. These days temperature control using digital PID controllers have automatic auto-tune functions. During the auto-tune period the PID controller controls the power to the process and measures the rate of change, overshoot and response time of the plant. This is often based on the Zeigler-Nichols method of calculating controller term values. Once the auto-tune period is completed the P, I & D values are stored and used by the PID controller.

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Microsoft Xbox 360 Elite - The Next Generation in Gaming Hardware

microsoft xbox 360 is all about the next generation of fun. The new system is a real power house that delivers the highest-rated next geneneration games line up with 6 out of the top 10 rated games.

There are two consoles to choose from. The xbox 360 which has a 20GB hardrive and the new xbox 360 Elite . Both systems come with wireless controllers, network cable, headset, AV cable, and a Silver membership to Xbox Live. Both are backwards compatible with xbox games. To transfer content from your current xbox to the 360 Elite, you'll need a hard Drive Transfer cable. Games are supported in high definition with a 16-to-9 aspect ratio, at either 480p, 720p or 1080i, with anti-aliasing as well as standard definition. Audio can be mono, stereo, or Dolby Digital 5.1. During installation, you can set audio and video preferences easily.

The new system has several advantages over its predecessor. hard-drive capacity leaps from 20GB to 120GB--a huge benefit if you plan to use the system to download lots of movie and music files from xbox live. And the unit now has an hdmi 1.2 interface; hdmi provides the optimal interconnection for high-definition video playback, and it delivers better image quality (at up to 1080p resolution) than can component video (limited to 1080i output on the xbox 360) or vga (at 1080p).

Microsoft's HD dvd player add-on drive provides a seamless integration with the 360 Elite to provide superior image quality. HD dvd images at 1080p were significantly sharper than those produced by the xbox 360 over component video at 720p resolution. Keep in mind that your HDTV also needs the 1080p resolution. HDMI and 1080p resolution may have less effect on how games appear than on how movies appear. This is because many games were created at 720p resolution; by contrast, all HD dvd movies are encoded at 1080p. It's just a matter of time before games will take advantage of the higher resolution.

Microsoft's xbox 360 has the wide popularity with the game Halo 3 which has given it a jump in the competition. Play station 3 and xbox 360 both have the game The Elder Scrolls: oblivion. Out side of differnt lighting and focus the games play the same on either console. The main difference is, the load time for the game, is by far faster on the Playstation 3. The war between xbox and PlayStation will ultimately be won by the popularity of the games exclusive to each system.

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Why are Wireless Headsets so Popular?

There are a few reasons why wireless headsets are popular. wireless headsets can give you freedom as well as keep you connected to the phone. Having the freedom to move around and get up from one certain spot is always a plus if you are on the telephone a lot. Another reason why wireless headsets may be popular is because of the fact they are so small. Most of the wireless headsets that are being sold are very small and compact, making wearing them more of a pleasure than a chore.

Can you buy a wireless headset for a cell phone? Yes, Bluetooth has recently come out with a headset that is wireless for the cell phone. This makes talking on the go even easier than before. without the aggravating wire getting in the way and tangled around you, talking on the phone has been brought to new heights.

Will a wireless headset be compatible with my cordless phone? Yes, depending on the model and brand of your cordless phone, you may be able to get a headset that is wireless to accommodate you. When you go shopping for your headset, be sure to take your cordless phone specifics with you so that you can make sure you get the correct one for your phone.

Can I hook up a wireless headset to my corded phone? Yes, headsets that are wireless originally came out to be used with corded phones. If all you have are corded phones, a wireless headset will set you free to be able to be on the phone and have your hands free. Wireless headsets come in a large variety of brands. Each brand having their own particular styles and models gives you an even bigger selection to choose from. Headsets that are wireless provide you with more freedom while talking on the phone. Not being tied down to a certain spot while on the telephone is a great thing if you are a multitasker.

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Backup Xbox 360 Downloads

Xbox 360 boasts hard-hitting games in its console. Utilizing its powerful processor and graphic capabilities, It has some of the best games around. These top seller games include call of duty 2, ghost recon advanced warfare, the elder scrolls IV: oblivion, Dead or Alive 4, Saints row, Gears of war and the best-selling game Halo 3. These are just a sample of the games for the new Xbox and there are lots more of titles available not only in the market but also in the internet for download.

If you have these games, it will surely pass around friends that have an Xbox 360. Its breath taking graphics and heart pounding action will surely make you play the game again and again. But due the fact that the microsoft xbox360 is causing a lot of trouble on game discs like scratches due the malfunction of several dvd-drives and therefore you should be able to backup your own copy.

Here's a quick guide on how to do it:

Requirements:

1) A dvd-drive which can be easily taken apart
2) Your xbox360 game
3) Data/Movie dvd which is at least 8gigabyte in size
4) Philips screwdriver to open your dvd-drive
5) WxRipper can be found @ http://www.360-scene.org/
6) Optional: Wx360 which can be found @ http://www.360-scene.org/
7) Last but not least, some patience

1: Take your dvd-drive apart

First, we need to access the laser unit of our dvd-drive, this can usually be done by removing the screws which holds it casing.

2: Installing your dvd-drive

The hardest part is over now and we should now connect our dvd-drive to the computer and place it on an easy accessible place.

3: WxRipper

By now you should have extracted both files mentioned earlier and have them installed on your computer, and then run WxRipper.

a) Put your dvd in the drive which is over 8 gigabyte and wait until your computer recognized it.

b) From the menu select Hotswap and then "Find magic number".

c) After the magic number has been found you select "Stop drive".

d) Now comes the magic part, you need to switch the dvd which is in your drive with your original game.

Warning: this needs to be done without pressing the eject button!!

e) When everything is back in place you can select "spin drive"

f) When the drive is spinning again then it is time to dump the image. Clicking on "start dump" can do this

g) You can take a break now as this stage can take a long time depending on the read speed of your dvd drive.

h) After it's done, you have now dumped your xbox360 game.
- The dumped image is an exact RAW copy of the original game disc, which means any dummy data is copied with this.
- You can now burn this .iso file to an empty dvd-r dl.

With this you can now play your favorite game over and over again without the fear that the disc will be damaged.

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