~Sunil & Praveen

In the EVS session, we learned how to integrate science with Mathematics, Arts, and Literature for lower grade students. This type of teaching would enable students to engage both their left and right brain which indeed will make them engage with the subject more practically and store information in their long-term memory. We discussed and learned about mammals. In which we discussed dog family.

The science

Dog

Kingdom	Animalia
Class	Mammalia
Order	Carnivora
Family	Canidae

 

Characteristic of Canidae family:

•       Canids are basically vertebrates, warm-blooded, mammals, and carnivores
•       They have 2 forelegs, 2 hind legs, and bushy tail
•       5 toes on forefoot 5 toes on hind-foot
•       They have elongated skull
•       They have a great sense of smelling and hearing

Animals under Canidae family:

•       Dogs
•       Wolf
•       Coyote
•       African Wild Dog
•       Fox
•       Jackals

Mathematics and Literature

We sang a numerical poem about dogs that had increase and decrease in numbers as we proceed to the next stanza. With this, we could integrate language and mathematics by teaching students English poems along with ascending order and descending order.  

 Art

Making Paper dog

This creative method of integrated learning makes teaching and learning fun and effective. We could also integrate Social science and History with this  by telling students about the evolution of dogs.

 

~Sharat Kumar

In EVS session, we learned about amphibians and their characteristic features. We discussed what the unique features of amphibians are. We learned to model a Puppet frog to engage children with the lessons by storytelling and to explain the characteristic features of amphibians.

Amphibians are small organisms which come under vertebrates (animal with a spinal cord surrounded by cartilage or bone) that need water, or a moist environment, to survive. The species in this group include frogs, toads, salamanders, and newts. All can breathe and absorb water through their fragile and moist skin. Amphibians also have specialized skin glands that produce useful proteins.

We shall now see the equipment’s and steps required to make Puppet Frog.

Materials Required:

1. Color Paper
2. Compass
3. Pencil
4. Glue

Step 1:

Take two color papers and draw a circle using compass. Cut the remaining part

Step 2:

Make a hole in one circular sheet and cut it into half.

Step 3:

Make 4 legs, eyes and tongue with the remaining paper.

Step 4:

Apply glue to the edge of the circle and stick the semi-circle as shown below.

Step 5:

Stick the 4 legs and eyes as shown below using glue.

Step 6:

Now stick the tongue of the frog using glue as shown

Step 7:

Allow the glue to dry and the puppet is ready.

~Hari & Praveen

This week we discussed the book “The House on Mango Street,” written by Sandra Cisneros, a Mexican-American author and a person of color. She grew up in a Hispanic community. Her memoir consisting of several short stories, brings out several issues around race, sexuality, culture, economic inequality, and gender inequality. This book helped us draw parallels between the critical issues as depicted in the stories and the cause centric initiatives that Quilt supports with various foundations.

Esperanza’s memoir shows her life in a neighborhood where female continuously becomes a victim of molestation, regardless of any age. The chapters “Rafaela Who Drinks Coconut & Papaya Juice on Tuesdays” and “Linoleum Roses” highlights Gender inequality and Domestic Abuse – by locking girls at home and forcing them to do house chores.

In the chapter “First job,” Esperanza confronted her first harassment – When her co-worker, an old adult, misbehaved with her, she could not do defend herself. She never brought up the abusive incident and continued to do her duty as she was in dire straits. She hid her age to join the company. Poverty suppresses her power of ‘Right to Freedom of Expression’ in one way or another.

We took the Quilt case study on ‘How might we empower low-income college girls to change their future?’ which focuses on gender equality and women empowerment. In Quilt AI, we analyze 107000 digital content pieces and 68000 search impressions. If this memoir got posted in any social media, Esperanza and other (possible) victims could have been made aware and ‘nudged’ towards a more reliable and safer path of support.

~Abilash

During the EVS session on Animal kindom, our guide Ravi Alunganthi suggested us to do a poster on any specific bird we were interested in. Each one of us chose a bird to be presented. Taking the  Horned Lurk, I googled its different characteristics such as name, habitat, diet, nesting, lifespan etc. Each individual presented their bird to the team, where we shared additional knowledge. The aim of the poster was for the students to get a better innate understanding of birds. As an activity given to the students during the lock down, a  student had shown interest and made her poster on Peacock.

  

Name: Horned Lark

Scientific Name: Eremophia alpestris

Family: Lark

Habitat: Prairies, fields, airports, shores, tundra. Inhabitants generally in open grounds, avoiding areas with trees or even bushes.

Diet: Feeds on small seeds from a great variety of grasses, weeds. Many insects are also eaten, especially in summer, when they may make up half of the total diet.

Eggs: Lays 2 to 5 eggs. Pale grey to greenish-white, blotched and spotted with brown. Incubation is by female, about 10-12 days.

Nesting: Often nests quite early in spring. Male defends nesting territory by singing, either on the ground or in flight. In-flight song display, male flies up steeply in silence, often to several hundred feet above the ground, then hovers and circles for several minutes while singing; finally dives steeply toward the ground. Nest site is on open ground, often next to grass clump, piece of dried cow manure, or other objects. Nest (built by female) is a slight depression in the ground, lined with grass, weeds, rootlets, with the inner lining of fine grass or plant down. One side of the nest often has a flat “doorstep” of pebbles.

 

 

 

~Bakyalakshmi

Sampling theorem:

fs≥2fm

• A continuous time signal can be represented as samples and can be recovered back when sampling frequency f_s is greater than or equal to twice the highest frequency component of message signal.
• If this condition does not satisfy, it leads to aliasing.
• Aliasing is an effect   that causes different signals to become indistinguishable when sampled.

Visualizing using python:

import matplotlib.pyplot as plt #  to plot

import numpy as np

#numerical python to get array of float values and for sine operation

t = np.arange(0, 2e-3, 10e-6) # x axis time period

# sampling at fs =10kHz in time domain ts=1/fs (0.1ms)

ts = np.arange(0,2e-3,0.1e-3)

f = 1000 # message signal fm

b = np.sin(2*np.pi*f*t) #phase for sinewave

c = np.sin(2*np.pi*f*ts)

plt.plot(t,b,”g”) # plot of message signal (1kHz)

plt.plot(ts,c,”k*”) # plot of sampled message signal (1kHz)

fs>=2fm:      Input frequency= 1kHz          sampling frequency = 10kHz

f=9000

b = -np.sin(2*np.pi*f*t)

c = -np.sin(2*np.pi*f*ts)

plt.plot(t,b) # plot of message signal (9kHz)

plt.plot(ts,c,’r+’)  # plot of sampled message signal (9kHz)

fs<2fm:      Input frequency = 9kHz        sampling frequency = 10kHz

Sampled output of 1kHz and 9kHz :

Aliasing of 1kHz and 9kHz

part1: https://youtu.be/og-Pn2oOqP4