Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - nayeemfaruqui

Pages: [1] 2 3 ... 20
Latest Technology / Smog-fighting drones
« on: March 12, 2014, 04:52:56 PM »
China has a new ally in its raging battle with the fog and smog lingering over Beijing - an unmanned drone spraying chemicals above the city. The Chinese government, with help from state-owned firm Aviation Industry Corp of China (AVIC), successfully tested the unmanned vehicles over the weekend at an airport in central China's Hubei province.

Called the Parafoil plane, the device is fitted to a gliding parachute and can carry 700kg of smog-clearing chemicals that can be used within a 5km radius - three times the cargo weight of common planes. The Chinese government, with help from state-owned firm Aviation Industry Corp of China (AVIC), successfully tested its Parafoil unmanned plane, pictured, over the weekend at an airport in central China's Hubei province. The plane has been designed to disperse smog above China's cities.
The soft-wing unmanned aerial vehicle (UAV) is also said to cost 90 per cent less than fixed-wing drones currently used to clear the smog.

Life Science / Fantastic Facts about the Human Body
« on: March 12, 2014, 04:36:49 PM »
The human body really is amazing. Check out these fantastic facts:

1. Approximately 80-90% of what we perceive as "taste" actually is due to our sense of smell.

2. Your heart beats about 35 million times in a year. During an average lifetime, the human heart will beat more than 2.5 billion times.

3. Your body has about 5.6 liters (6 quarts) of blood. This 5.6 liters of blood circulates through the body three times every minute. In one day, the blood travels a total of 19,000 km (12,000 miles)- that's four times the distance across the U.S. from coast to coast.

4. The heart pumps about 1 million barrels of blood during an average lifetime - that's enough to fill more than 3 super tankers.

5. If all arteries, veins, and capillaries of the human circulatory system were laid end to end, the total length would be 60,000 miles, or 100,000 km. That's nearly two and a half times around the Earth!

6. Even though its thickness averages just 2mm, your skin gets an eighth of all your blood supply.

7. The skull looks as though it is a single bone. In fact, it is made up of 22 separate bones, cemented together along rigid joints called sutures.

8. If a human adult's digestive tract were stretched out, it would be 6 to 9 m (20 to 30 ft) long.

9. Red blood cells may live for about four months circulating throughout the body, feeding the 60 trillion other body cells. Red blood cells make approximately 250,000 round trips of the body before returning to the bone marrow, where they were born, to die.

10. Human hair grows about 1/4 inch (about 6 millimeters) every month and keeps on growing for up to 6 years. The hair then falls out and another grows in its place.

11. The average healthy mouth produces about 600 milliliters of saliva each day. That's enough to fill a 12-ounce soda bottle.

12. The fastest nerve cells are carrying messages along their axons at an amazing 130 yards per second (268 mph).

History / Samurai
« on: March 12, 2014, 04:31:45 PM »
Samurai, the warrior class of feudal Japan. The samurai, also known as bushi (military gentry), were the elite fighters in the feudal armies of Japan. Their strict code, bushido, stressed loyalty, obedience, and a high sense of duty. As a symbol of their rank they wore two swords. The samurai class emerged in the eighth century. For many centuries samurai generally fought on horseback, but by the 19th century they had adopted infantry tactics and fought on foot.

Samurai military power was broken in 1868, when supporters of Emperor Mutsuhito overthrew the shogun and ended feudalism. The samurai class was abolished during 1873–76.

History / Genghis Khan
« on: March 12, 2014, 04:30:39 PM »
Genghis (also Jenghiz and Chingis) Khan, (1162?–1227), one of the world's great conquerors, founder of an enormous empire in Asia and eastern Europe. He was born by the Orhon River, near what is now the Russian-Mongolian border, and was named Temujin. His father was a minor Mongol (Tatar) chieftain. Until middle age Temujin was occupied with conquering neighboring tribes. In 1206 he convened a council and proclaimed himself Genghis Khan, leader of the Mongols.

He then began an invasion of China. By 1215 virtually all of China north of the Huang He (Yellow River) belonged to him. Immense booty was seized and taken to his capital at Karakorum in what is now Mongolia. In 1219 Genghis Khan turned southwest and plundered what are now parts of Kazakhstan, Uzbekistan, Turkmenistan, India, Afghanistan, and Iran. The thriving cities of Tashkent, Buxoro, Samarkand, Nishapur, and Herat were sacked and their inhabitants slaughtered. In 1222 the Mongol hordes overran the Caucasus and southern Russian regions. Soon after his death in 1227, Genghis Khan's empire was divided among his descendants.

History / Akihito
« on: March 12, 2014, 04:28:27 PM »
Akihito, (1933-), emperor of Japan, 1989- . He is formally called Tenno Heisei; Tenno is the Japanese title for emperor and Heisei (meaning “achieving peace”) is the name of his reign. Akihito succeeded to the imperial throne upon the death of his father, Hirohito. He is the 125th emperor of Japan.

Akihito was proclaimed heir to the throne in 1952. Departing from imperial tradition, he married a commoner, Shoda Michiko, in 1959. His son, Crown Prince Naruhito, was born in 1960. Akihito, like his father, became an expert in marine biology, and wrote more than two dozen scholarly papers and a book on the fish found in Japanese waters.

History / Saladin
« on: March 12, 2014, 04:27:08 PM »
Saladin, ( Arabic: Salah al-Din ) (1137?–1193), a sultan of Egypt and Syria. He united the Saracens (Muslims) against the Crusaders and restored Jerusalem to Muslim rule. Though ruthless in battle, Saladin was gallant and honorable in his dealings with the Crusaders, who admired and respected him.

Saladin was the son and nephew of Kurdish generals in the service of Nureddin, the Turkish Muslim sultan of Syria. Sent to Egypt with his uncle to establish Nureddin's authority there, Saladin became vizier (governor) of Egypt in 1169 and deposed the hereditary ruler in 1171. After the death of Nureddin in 1174, the caliph of Baghdad permitted Saladin to proclaim himself monarch of Egypt and Syria.

Meanwhile, Saladin had joined the holy war begun by Nureddin to drive the Crusaders out of the Holy Land. After many smaller victories, in 1187 Saladin inflicted a crushing defeat on the Christians at the Battle of Hattin; a few months later he took Jerusalem. The Third Crusade was organized to rescue the Holy City. Richard the Lion-Hearted, one of the leaders, defeated Saladin in several engagements. In a peace treaty, 1192, Saladin granted Christians the right to visit Jerusalem.

Saladin's empire was ruled by his family, the Ayyubids, until 1250.

History / Akkadians
« on: March 12, 2014, 04:21:24 PM »
Akkadians, an ancient people who inhabited a region of lower Mesopotamia known as Akkad, so called from their capital city (Accad in the Bible; Agade in inscriptions). The Akkadians were Semitic nomads from Arabia who appeared in Akkad around 3000 B.C. About 2340 B.C., Sargon, an Akkadian king, conquered the Sumerian city-states to the south and part of Assyria to the north, establishing the Akkadian Empire. The empire gradually declined until it was overthrown some two centuries later by the Guti, a tribe of northern barbarians. Akkad itself was conquered by the Amorites around 2000 B.C. and became part of the Old Babylonian Empire.

History / Babylonia
« on: March 12, 2014, 04:18:47 PM »
Babylonia, an ancient country that occupied the area of southwestern Asia that is now Iraq. It was located in the fertile valley of the Tigris and Euphrates rivers in southern Mesopotamia. Two great empires developed there—the Old Babylonian in the 18th century B.C. and the Neo-Babylonian (or Chaldean) in the seventh century B.C.

Babylonia began as a small kingdom centered around the city of Babylon and eventually spread over southern Mesopotamia. At its greatest extent, Babylonian power stretched from the Persian Gulf north into Assyria and west to the Mediterranean Sea. where it extended from Syria south to Egypt. In later times, Babylonia was also called Chaldea—after the Chaldeans, a Semitic people from the desert of Arabia who had settled there about the 11th century B.C.


Babylonian culture was greatly influenced by earlier Mesopotamian peoples. Nomads before settling in Mesopotamia, the Babylonians adopted and preserved many elements of the civilization developed there more than a thousand years earlier by the Sumerians. Through commerce and conquest, the Babylonians helped spread Mesopotamian culture to surrounding lands.

Among the outstanding accomplishments of the Old Babylonian period was the Code of Hammurabi, a compilation of laws. It sheds light on Babylonian society, indicating, for example, that there were three classes—nobles, commoners, and slaves.

The Babylonians also made significant advances in the sciences. They made many accurate astronomical observations, recognized several constellations, predicted eclipses of the sun and of the moon, and performed complex mathematical calculations.

Babylonia's economy was based on farming and trading. The land was fertile, but the climate was hot and dry, and agricultural prosperity depended on the use of irrigation canals. The major crops were dates and grain. The Babylonians traded throughout the Near East and east into India, by river and sea and overland by caravans. Major imports were metals, lumber, and other raw materials. Textiles were among their major exports. Trade and industry were carried on largely by private enterprise.

The outstanding feature in each city was the temple tower, or ziggurat, which consisted of a series of terraces. The temple stood at the top of the tower. The Biblical Tower of Babel in Babylon was a ziggurat. Religion was a powerful force, and the priests sometimes held more authority than the kings. Many of the gods and religious practices of the Babylonians were adapted from those of the Sumerians. Marduk, the god of Babylon, was the country's chief deity. Babylonian literature dealt mainly with legends of heroes and gods. The Epic of Creation recounts Marduk's rise to preeminence.

A big step in the development of next-generation fuel cells and water-alkali electrolyzers has been achieved with the discovery of a new class of bimetallic nanocatalysts that are an order of magnitude higher in activity than the target set by the U.S. Department of Energy (DOE) for 2017. The new catalysts, hollow polyhedral nanoframes of platinum and nickel, feature a three-dimensional catalytic surface activity that makes them significantly more efficient and far less expensive than the best platinum catalysts used in today's fuel cells and alkaline electrolyzers. This research was a collaborative effort between DOE's Lawrence Berkeley National Laboratory (Berkeley Lab) and Argonne National Laboratory (ANL).

Public Health / Re: Benefits of walking
« on: March 12, 2014, 02:51:53 PM »
Thanks for the post

Life Science / Bionic Eye
« on: March 11, 2014, 04:50:24 PM »
In Australia, a bunch of engineers and designers unveiled one of the world's first bionic eyes in June. Using a microchip embedded in the skull and a digital camera set on a pair of glasses, the bionic eye has the potential to help 85 percent of people who are legally blind see the outlines of their surroundings.

Here's how this bionic eye works: Mounted on the snazzy glasses is a camera similar to the one on an iPhone. The camera captures an image, and a sensor inside the glasses directs the camera's field of vision as a person turns his or her head. A digital processor modifies the captured images and then sends the signal wirelessly to the chip implanted at the back of the brain. The chip sends electrical signals through tiny electrodes that stimulate the brain's visual center. Over time, the brain interprets these signals as images.

« on: March 11, 2014, 04:42:50 PM »
That is wonderful information for my PC thanks

জ্বর খুবই সাধারণ একটি সমস্যা, কিন্তু এ নিয়ে সবার আছে শঙ্কা। ইনফেকশনজনিত অধিকাংশ রোগের ক্ষেত্রেই জ্বর হচ্ছে অন্যতম উপসর্গ। জ্বর এলে শরীরে স্বাভাবিকের চেয়ে বেশি তাপমাত্রা অনুভূত হয়। এ তাপমাত্রা বৃদ্ধির কারণে দেহ থেকে পানি ও লবণ এবং ঘাম শ্বাসের মাধ্যমে বেরিয়ে যায়। এর ফলে রোগী পানিস্বল্পতা বা  ডিহাইড্রেশনে ভোগেন এবং অধিক বিপাকীয় কার্যকলাপের জন্য দেহ থেকে ক্যালরি বা শক্তি ক্ষয় হয়।

এ সময় শরীরের ওজনও কমে যেতে পারে। ফলে শরীর দুর্বল, অবসাদগ্রস্ত হয়ে পড়ে এবং খাওয়ার রুচিও কমে যায়। বেশিরভাগ ক্ষেত্রে জ্বর সারার পর উপযুক্ত উপসর্গ দেখা যায় বলে একে ক্রনিক ফ্যাটিগ সিনড্রোম বলে। এ অবস্থা কয়েক সপ্তাহ থেকে কয়েক মাস পর্যন্ত চলতে পারে। একে জ্বরের কনভ্যালিসিন পিরিয়ড বলে।

কাজেই জ্বর সারার পরের কয়েকটি দিন বা কনভ্যালিসিন পিরিয়ডে অন্তত ৪-৭ দিন সম্পূর্ণ বিশ্রামে থাকা ভালো। এতে ফ্যাটিগ বা অবসাদগ্রস্ততা কিছুটা কাটে।

তবে দ্রুত সুস্থ হয়ে ওঠার জন্য কিছু স্বাস্থ্যবিধি মেনে চলা প্রয়োজন।

১) জ্বরে যেহেতু কম-বেশি স্বাস্থ্যহানি ঘটে, তাই সম্পূর্ণ ভালো হতে পুষ্টিকর খাবারের প্রতি লক্ষ্য রাখা উচিত।

২) জ্বরের সময় এবং জ্বর সেরে যাওয়ার পরও জ্বরভেদে প্রায় এক মাস সময় পর্যন্ত পানি, পানীয় (ডালের পানি, ডাবের পানি, বেভারেজ, শরবত, ফলের রস) ও ওরস্যালাইন প্রতিদিন পান করতে হয়।

৩) সুষম খাবার বিশেষ করে প্রোটিন (মাছ, মাংস, ডিম, দুধ, ডাল) ও কার্বোহাইড্রেট বেশি পরিমাণে খেতে হয়। এর ফলে ধীরে ধীরে রুচি ফিরে আসে এবং শরীর স্বাভাবিক হয়ে ওঠে।

৪) ম্যালেরিয়া ও কালোজ্বরের রোগীদের বেশিরভাগ সময় রক্তশূন্যতা দেখা যায়। এ রোগীদের প্রোটিনের পরিমাণ কমে যায় (হাইপো-অ্যালবুনিমিয়া) এজন্য পায়ে পানি আসে। তাই তাদের পুষ্টিকর খাবার, প্রোটিন ও আয়রনজাতীয় খাবার বেশি খেতে হয়। এ ধরনের জ্বরের রোগীদের অনেক সময় রোগ নির্ণয় হতে দেরি হয় এবং চিকিৎসা চললেও সুস্থ হতে বেশ কয়েক মাস (২-৩ মাস) লেগে যায়।

৫) টিবি বা যক্ষ্মার (ফুসফুস ছাড়াও দেহের যে কোনো অঙ্গে হতে পারে) রোগীরা স্বাস্থ্যহীনতায় ভোগে। চিকিৎসা চলাকালে খাওয়ার রুচি ফিরে আসে, তখন পুষ্টিকর খাদ্য বিশেষ করে প্রোটিন বেশি খেতে হবে। বর্তমানে টিবির ওষুধের মান ভালো, যা তেমন স্বাস্থ্যহানি ঘটায় না, তাই পুষ্টিকর খাবার খেতেই হবে এমন কোনো বাধ্যবাধকতা নেই।

৬) অ্যামিবিক লিভার এবসেস বা লিভারে পুঁজ জমা রোগীদেরও অনেকদিন ধরে গায়ের জ্বরে ভোগে। এদের পায়ে পানি আসতে পারে। প্রোটিন খাওয়ার প্রতি জোর দিতে হয়।

যাদের রাতে জ্বর থাকে বা ফ্লু জাতীয় অসুস্থতা বা ইনফ্লুয়েঞ্জা হয়, তাদের উপরের ও নিচের ঠোঁটে ফোসকা (অনেকে একে জ্বর-ঠোসা বলে) হতে পারে। একে

হারপিস সিমপ্লেক্স ভাইরাস ওয়ান বলে, যা হারপিস ল্যাবিলাস ভাইরাস দিয়ে হয়। ৫-৭ দিনে সাধারণত এ ফোসকা শুকিয়ে যায় এবং শুকালে ওই অংশ ফেটে গিয়ে রক্তক্ষরণ হতে পারে। তাই ব্যথা বা অস্বস্তি এড়ানোর জন্য গ্লিসারিন বা লিকুইড প্যারাফিন ঠোঁটের এই অংশে লাগানো যায়।

তবে ফ্লু ছাড়াও মেনিনজাইটিস, নিউমোনিয়া, ম্যালেরিয়া ও প্রস্রাবে ইনফেকশন (পায়েলোনেফ্রাইটিস) থেকে এ ফোসকা উঠতে পারে। তাই সঠিক রোগ নির্ণয়ের জন্য চিকিৎসকের পরামর্শ নেওয়া ভালো।

Pages: [1] 2 3 ... 20