Not been on here much past few months. Other things. But as approach close of tumultuous year I'm thinking of all those still - despite - doing amazing things in design, built environment, education, equity, place making, advocacy. Just some of those who inspire me. Thread:

Marvels of Medical Science in Ancient India

ACHARYA SUSHRUTA and SUSHRUTA SAMHITA

Ancient Indians were pioneers in diverse fields of study and their genius was centuries ahead of their times. Feel the glory, basking in pride of their unparalleled achievements.

(Thread)

Sushruta (circa 7th or 6th century BC) was a surgeon who in present times is known as the “father of Indian medicine” and “father of plastic surgery” for inventing and developing surgical procedures. He lived in Kashi on the banks of river Ganga.(1)

His work documented in the Sushruta Samhita (compendium) is one of the oldest texts in the world on plastic surgery and regarded as one of the trilogies of Ayurveda. The other 2 being the Charaka Samhita and Astanga Hridaya.(2)

Sushruta compiled the Sushruta Samhita as an instruction manual for physicians to treat patients.(3)

The Samhita caters to surgical techniques listing over 300 surgical procedures and 120 surgical instruments. Additionally to 1,120 diseases, injuries and their treatments with over 700 medicinal herbs and their application.(4)

Important paper from Google on large batch optimization. They do impressively careful experiments measuring # iterations needed to achieve target validation error at various batch sizes. The main "surprise" is the lack of surprises. [thread]

https://t.co/7QIx5CFdfJ

The paper is a good example of lots of elements of good experimental design. They validate their metric by showing lots of variants give consistent results. They tune hyperparamters separately for each condition, check that optimum isn't at the endpoints, and measure sensitivity.

They have separate experiments where the hold fixed # iterations and # epochs, which (as they explain) measure very different things. They avoid confounds, such as batch norm's artificial dependence between batch size and regularization strength.

When the experiments are done carefully enough, the results are remarkably consistent between different datasets and architectures. Qualitatively, MNIST behaves just like ImageNet.

Importantly, they don't find any evidence for a "sharp/flat optima" effect whereby better optimization leads to worse final results. They have a good discussion of experimental artifacts/confounds in past papers where such effects were reported.

Ashta Siddhi

Ashta Siddhi is mentioned in Patanjali Yog sutra and can be obtained by very few through countless years of practice and devotion to all eight limbs of Ashtanga Yoga.

Siddhi can loosely be translated as accomplishment or a special power or unusual skill.

The eight Siddhis are:

1. Anima: Reducing one’s physical self to the size of an atom.

2. Mahima: Expanding one’s physical self to infinite level

3. Garima: Making one’s physical self so heavy as immovable by others

4. Laghima: Becoming almost weightless

5. Prapti: Being able travel anywhere in the Universe

6. Prakamya: Can know & understand what is going on in one’s mind. Can understand other person’s min.

7. Ishitva: Possessing title of Bhagwan

8. Vashitva: A seeker can subdue any person/thing

(Hanuman Jayanti is coming)

Hanumanji not only possessed all eight siddhis, but was also blessed by Sita mata as “Ashta Siddhi Nau Nidhi Ke Daata”.

When Hanumanji first reaches to Lanka on his mission to find Sita, he makes use of anima so as to be discrete in enemy territory.

He uses it again when he approaches Sita mata for the first time – reducing his size to that of a schoolboy, to avoid scaring her. He uses mahima to outwit & overpowers
the demons.

THREAD: What is Golden Crescent and Golden Triangle and how it impacts India?

Golden Crescent region of South Asia - comprises of Afghanistan, Iran, and Pakistan - which is a principal global site for opium production and distribution.

Golden Triangle is the area where the borders of Thailand, Laos and Myanmar meet at the confluence of the Ruak and Mekong rivers. The Golden Triangle is called so because of the triangular shape formed by the locations of New Delhi, Agra and Rajasthan on a map.

India is wedged bw world’s 2 largest areas of illicit opium production, Golden Crescent & Golden Triangle, that has made Indian borders vulnerable to drug trafficking. It flows from 2 fronts, NW & NE, that possesses dual concern - violation of border & threat to national security

- Golden Crescent is world’s leading opium and cannabis producing region since 1983.

- Its proximity to Indo-Pak border has worsened the trafficking of hashish and heroin into Indian soil

- Trafficking happens through the border states of J&K, Punjab, Rajasthan and Gujarat.

- Golden Triangle is leading opium producing region of the South-east Asia, also an ancient narcotics supply route to North America & Europe.

- Myanmar-Northeast nexus is recognized by NCB as the root of heroin & chemical drugs

- Myanmar produces 80% of heroin produced in world

Do you know?

The Golden Shine on the artificial jewellery of modern times is a gift by Nagarjuna.

Now,u might be wondering,who is Nagarjuna?

Nagarjuna was the name of an ancient Indian scholar&scientist whose name is associated with the fields of Alchemy,Chemistry& Metallurgy.

He conducted a number of alchemic and Metallurgical experiments directed towards transforming base elements into Gold.
According to Eduard Sachau's Alberuni's India, Nagarjuna was termed as a Metallurgist who was born 100 yrs before Alberuni's time, who was born in 973 CE.

According to some records Nagarjuna was born in 9th century CE near Somnath,Gujarat and according to some Tibetan & Chinese sources he was born in Vidarbha,Maharashtra from where he later migrated to Deccan region.

Edward Schau quotes in his book,'They have a science similar to Alchemy and Nagarjuna is famous for this science which they call as 'Rasayana'.

Nagarjuna's book 'Rasaratnakara' is one of the earliest documented texts on Alchemy,Chemistry & Metallurgy in Sanskrit.Nagarjuna successfully discovered through his experiments the alchemy of transmutation of base metals into Gold.This was not real gold but a gold like substance.