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Topics - Md.Fakhrul Islam

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Teaching & Research Forum / Tips for new researcher
« on: June 06, 2017, 04:11:20 PM »

1. Schedule! I tell my students that the first step in writing a research paper is to admit you have a research paper. ...

2. Start, don't end, with Wikipedia. ...

3. Mine bibliographies. ...

4. Have a research question in mind. ...

5. Deal with one piece at a time. ...
6. Use a system. ...
7. Know your resources. ...
8. Ask for help.

10 Recent Inventions That Aren’t As New As We All Thought

Plz see the link


This link is helpful for physics environmental researcher...

so, plz see the link

কালিজিরার গুণাগুণ

* কালিজিরার তেল মাথাব্যথা সারাতে দারুণ উপকারী। কালিজিরার তেল কপালে মালিশ করলে এবং তিন দিন খালি পেটে এক চামচ তেল খেলে আরোগ্য লাভ করা যায়।

* চুল শ্যাম্পু করার পর শুকিয়ে নিন। এবার পুরো মাথায় কালিজিরার তেল ভালো মতো লাগান। এক সপ্তাহ নিয়মিত করলে চুল পড়া অনেক কমে যাবে।

* যাদের হাঁপানির সমস্যা আছে তারা বুকে ও পিঠে কালিজিরার তেল মালিশ করতে পারেন, উপকার পাবেন।

* কালিজিরার তেল ও চূর্ণ ডায়াবেটিসের জন্য উপকারী। নিয়মিত সেবনে ডায়াবেটিস নিয়ন্ত্রণে থাকে।

* এক কাপ দুধ ও এক চামচ কালিজিরা তেল একসঙ্গে মিশিয়ে দৈনিক পান করুন। পেটে গ্যাসের সমস্যা থাকলে তা কমে যাবে।

* যাদের উচ্চ রক্তচাপ আছে তারা দৈনিক কোনো না কোনোভাবে কালিজিরা সেবনের চেষ্টা করুন, কালিজিরা রক্তচাপ নিয়ন্ত্রণে রাখতে সাহায্য করে।

* জ্বর হলে সকাল-সন্ধ্যায় লেবুর রসের সঙ্গে কালিজিরার তেল পান করুন। জ্বর দ্রুত সেরে যাবে।

* হাঁটুর ব্যথা সারাতে রোজ রাতে কালিজিরার তেল হাঁটুতে মালিশ করুন, হাঁটুর ব্যথা কমে যাবে।


 Many people are landless and forced to live on and cultivate flood-prone land; waterborne diseases prevalent in surface water; water pollution, especially of fishing areas, results from the use of commercial pesticides; ground water contaminated by naturally occurring arsenic; intermittent water shortages because of falling water tables in the northern and central parts of the country; soil degradation and erosion; deforestation; severe overpopulation

Definition: This entry lists the most pressing and important environmental problems. The following terms and abbreviations are used throughout the entry:

Acidification - the lowering of soil and water pH due to acid precipitation and deposition usually through precipitation; this process disrupts ecosystem nutrient flows and may kill freshwater fish and plants dependent on more neutral or alkaline conditions (see acid rain).

Acid rain - characterized as containing harmful levels of sulfur dioxide or nitrogen oxide; acid rain is damaging and potentially deadly to the earth's fragile ecosystems; acidity is measured using the pH scale where 7 is neutral, values greater than 7 are considered alkaline, and values below 5.6 are considered acid precipitation; note - a pH of 2.4 (the acidity of vinegar) has been measured in rainfall in New England.

Aerosol - a collection of airborne particles dispersed in a gas, smoke, or fog.

Afforestation - converting a bare or agricultural space by planting trees and plants; reforestation involves replanting trees on areas that have been cut or destroyed by fire.

Asbestos - a naturally occurring soft fibrous mineral commonly used in fireproofing materials and considered to be highly carcinogenic in particulate form.

Biodiversity - also biological diversity; the relative number of species, diverse in form and function, at the genetic, organism, community, and ecosystem level; loss of biodiversity reduces an ecosystem's ability to recover from natural or man-induced disruption.

Bio-indicators - a plant or animal species whose presence, abundance, and health reveal the general condition of its habitat.

Biomass - the total weight or volume of living matter in a given area or volume.

Carbon cycle - the term used to describe the exchange of carbon (in various forms, e.g., as carbon dioxide) between the atmosphere, ocean, terrestrial biosphere, and geological deposits.

Catchments - assemblages used to capture and retain rainwater and runoff; an important water management technique in areas with limited freshwater resources, such as Gibraltar.

DDT (dichloro-diphenyl-trichloro-ethane) - a colorless, odorless insecticide that has toxic effects on most animals; the use of DDT was banned in the US in 1972.

Defoliants - chemicals which cause plants to lose their leaves artificially; often used in agricultural practices for weed control, and may have detrimental impacts on human and ecosystem health.

Deforestation - the destruction of vast areas of forest (e.g., unsustainable forestry practices, agricultural and range land clearing, and the over exploitation of wood products for use as fuel) without planting new growth.

Desertification - the spread of desert-like conditions in arid or semi-arid areas, due to overgrazing, loss of agriculturally productive soils, or climate change.

Dredging - the practice of deepening an existing waterway; also, a technique used for collecting bottom-dwelling marine organisms (e.g., shellfish) or harvesting coral, often causing significant destruction of reef and ocean-floor ecosystems.

Drift-net fishing - done with a net, miles in extent, that is generally anchored to a boat and left to float with the tide; often results in an over harvesting and waste of large populations of non-commercial marine species (by-catch) by its effect of "sweeping the ocean clean."

Ecosystems - ecological units comprised of complex communities of organisms and their specific environments.

Effluents - waste materials, such as smoke, sewage, or industrial waste which are released into the environment, subsequently polluting it.

Endangered species - a species that is threatened with extinction either by direct hunting or habitat destruction.

Freshwater - water with very low soluble mineral content; sources include lakes, streams, rivers, glaciers, and underground aquifers.

Greenhouse gas - a gas that "traps" infrared radiation in the lower atmosphere causing surface warming; water vapor, carbon dioxide, nitrous oxide, methane, hydrofluorocarbons, and ozone are the primary greenhouse gases in the Earth's atmosphere.

Groundwater - water sources found below the surface of the earth often in naturally occurring reservoirs in permeable rock strata; the source for wells and natural springs.

Highlands Water Project - a series of dams constructed jointly by Lesotho and South Africa to redirect Lesotho's abundant water supply into a rapidly growing area in South Africa; while it is the largest infrastructure project in southern Africa, it is also the most costly and controversial; objections to the project include claims that it forces people from their homes, submerges farmlands, and squanders economic resources.

Inuit Circumpolar Conference (ICC) - represents the 145,000 Inuits of Russia, Alaska, Canada, and Greenland in international environmental issues; a General Assembly convenes every three years to determine the focus of the ICC; the most current concerns are long-range transport of pollutants, sustainable development, and climate change.

Metallurgical plants - industries which specialize in the science, technology, and processing of metals; these plants produce highly concentrated and toxic wastes which can contribute to pollution of ground water and air when not properly disposed.

Noxious substances - injurious, very harmful to living beings.

Overgrazing - the grazing of animals on plant material faster than it can naturally regrow leading to the permanent loss of plant cover, a common effect of too many animals grazing limited range land.

Ozone shield - a layer of the atmosphere composed of ozone gas (O3) that resides approximately 25 miles above the Earth's surface and absorbs solar ultraviolet radiation that can be harmful to living organisms.

Poaching - the illegal killing of animals or fish, a great concern with respect to endangered or threatened species.

Pollution - the contamination of a healthy environment by man-made waste.

Potable water - water that is drinkable, safe to be consumed.

Salination - the process through which fresh (drinkable) water becomes salt (undrinkable) water; hence, desalination is the reverse process; also involves the accumulation of salts in topsoil caused by evaporation of excessive irrigation water, a process that can eventually render soil incapable of supporting crops.

Siltation - occurs when water channels and reservoirs become clotted with silt and mud, a side effect of deforestation and soil erosion.

Slash-and-burn agriculture - a rotating cultivation technique in which trees are cut down and burned in order to clear land for temporary agriculture; the land is used until its productivity declines at which point a new plot is selected and the process repeats; this practice is sustainable while population levels are low and time is permitted for regrowth of natural vegetation; conversely, where these conditions do not exist, the practice can have disastrous consequences for the environment .

Soil degradation - damage to the land's productive capacity because of poor agricultural practices such as the excessive use of pesticides or fertilizers, soil compaction from heavy equipment, or erosion of topsoil, eventually resulting in reduced ability to produce agricultural products.

Soil erosion - the removal of soil by the action of water or wind, compounded by poor agricultural practices, deforestation, overgrazing, and desertification.

Ultraviolet (UV) radiation - a portion of the electromagnetic energy emitted by the sun and naturally filtered in the upper atmosphere by the ozone layer; UV radiation can be harmful to living organisms and has been linked to increasing rates of skin cancer in humans.

Water-born diseases - those in which bacteria survive in, and are transmitted through, water; always a serious threat in areas with an untreated water supply.

Science Discussion Forum / Research Cycle
« on: June 13, 2013, 10:05:34 AM »
Research Cycle

Research, the process of finding information about a topic, analyzing it and synthesizing your own conclusions from what you have learned. It is not a linear process. In other words, you will not necessarily follow steps in a nice, straight line towards your goal.

Research is a cycle, a somewhat messy process that allows for moving ahead, evaluating your results, then going back if necessary to revise your plan and uncover new information, until you reach your goal.

Self Improvement / Self Development Cycle
« on: June 10, 2013, 02:53:43 PM »
 Self Development Cycle

Self Improvement / some Personal development Tips
« on: June 10, 2013, 02:41:42 PM »
At the level of the individual, personal development includes the following activities:

•   improving self-awareness
•   improving self-knowledge
•   building or renewing identity
•   developing strengths or talents
•   improving wealth
•   spiritual development
•   identifying or improving potential
•   building employ ability or human capital
•   enhancing lifestyle or the quality of life
•   improving health
•   fulfilling aspirations
•   initiating a life enterprise or personal autonomy
•   defining and executing personal development plans
•   improving social abilities

Science Discussion Forum / Future Technology........ Nanotechology
« on: June 05, 2013, 12:40:58 PM »

Technology at the nano level, or nanotechnology, allows for unbelievable precision and a way to copy the work of nature at its most basic functioning, but just how small is a nano? According to the National Nanotechnology Initiative, a sheet of paper is 100,000 nanometers thick and there are 25.4 million nanos in 1 inch. A nanometer is one-billionth of a meter.

How is this impacting technology and the future? In just about every field, nanotechnology is being used for innovations in engineering, medical devices, imaging, computing and many more. Nano medicine is one area experiencing rapid and dramatic growth. Because many illnesses and disorders in the body take place at the cellular level and grow as ruled by the formation of genetic makeup, nanotechnology has the capability to treat at the very root of the condition, rather than after it's fully spread throughout the body. It can be both preventative and curative because treatment reaches the narrowest and most minuscule centers of control. Neurosurgery and gene therapy are just two areas within nanomed that are particularly well-suited for nano tools and technology.


In today’s job market it is far more important to have practical skills than theoretical knowledge. In the future, job applicants may not need any formal qualifications?

To what extent do you agree or disagree?

The number of skilled labors seems to increase each year and the competition for each job is also increasing. Today it is fashionable to have high prestige education received in the one of best universities in the world. Although, to have a master degree with excellent marks does not mean you will be invited to the leading companies. Nowadays, it is invaluable to have more practical skills than theoretical ones. And I totally agree with this statement for several reasons.

In the first place, it requires no capital investments for the employers. As we have stepped into “The Informative age” many outstanding ideas and programs are created frequently. Therefore, employers have to spend huge money in their employees. Also it takes time but as we all know: Time is money.

Secondly, some theoretical knowledge has been becoming old-fashioned every year. Actually, most of information that is given in colleges and universities cannot be use in a practice.

As it was previously stated, employers are in need of specialists with huge practical skills that workers can use immediately without extra education. Because of market demand that changes every day, people have to adapt to new requirements. Maybe we really may not need any formal qualifications in the near future.[/b]

Science and Information / Onlilne Journals
« on: June 05, 2013, 11:44:31 AM »
If anybody interest to gather knowledge form the journal in any filed. This links help him. Because this website have a many links of international journals.

Latest Technology / 10 Upcoming Technology That May Change The World
« on: June 01, 2013, 05:21:12 PM »
10 Upcoming Technology That May Change The World.

See the link

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