Health, safety and security at workplace 



Health

Health of an employee is the state of the physical, mental and social well being. Every organisation must provide healthy and safety working environment for their employees at the workplace. Health of an employe

e must be in a good condition so that the employees of the organisation will not suffer from any diseases

Safety

The work environment of the organisation must be safe. It must be free from hazards and risk. A risk is a probability of causing harm to the people. A proper safety guidelines must be prepared by the company and it should be strictly followed.

Security

Every employee working in an organisation must feel that they are secured in the company campus. Security is a kind of freedom from any potential harm. Security ensures the safety of the people working in the organisation.

Policies and Procedures for Health, Safety and Security

1. A health, safety and security policy is a written statement by an employer stating the company’s commitment for the protection of the health, safety and security of employees and to the public.

2. A health, safety and security program /policy contains the health, safety and security elements of an organisation and objectives which make it possible for the company to achieve its goal in the protection of its workers at the workplace.

3. The government has a specific section mentioned in their company laws, which states the minimum requirements to be followed for health, safety and security programme.

Safety Guidelines

1. Store all cleaning chemicals in tightly closed containers in separate cupboards.

2. Throw garbage daily.

3. Make sure all areas have proper lighting.

4. Do not wear loose clothing or jewellery when working with machines.

5. Never distract the attention of people who are working near a fire or with some machinery, tools or equipment.

6. Where required, wear protective items, such as goggles, safety glasses, masks, gloves, and hair nets.

7. Shut down all machines before leaving for the workplace.

8. Do not play with electrical controls or switches.

9. Do not operate machines or equipment until you have been properly trained and allowed to do so by your supervisor.

10. Repair torn wires or broken plugs before using any electrical equipment.

11. Do not use equipment if it smokes, sparks or looks unsafe.

12. Cover all food with a lid, plastic wr or aluminium foil.

13. Do not smoke in ‘No Smoking’ areas.

14. Report any unsafe condition or acts to your supervisor.


Hazard

A hazard is a situation or source that has the potential to cause harm, such as injury, property damage, or environmental damage. Hazards can be natural, human-caused, or a combination of both. Some types of hazards in safety: chemical, biological, physical, and ergonomic:







Physical Hazards:- It is the risks arising from the physical work environment – floors, facilities, walls, and ceilings. Physical hazards could also mean working with machinery and electricity operated machines.

Chemical hazards:- These can include liquids, vapors, fumes, dust, gases, flammable materials, and pesticides. Exposure to these substances can cause severe health conditions.

Biological hazards:- These include exposure to harm or disease from working with animals, people, or infectious plant materials. Examples include blood, bodily fluids, bacteria, viruses, mildew, molds, poisonous plants, and stinging insects.

Ergonomic hazards:- Ergonomic hazards are physical conditions that may pose a risk of injury to the musculoskeletal system due to poor ergonomics. These hazards include awkward or static postures, high forces, repetitive motion, or insufficient rest breaks activities.

Electrical hazards:- It refers to the potential dangers and risks that are associated with electrical systems.

Occupational hazard

An occupational hazard is the illness one may acquire due to his occupation. Like people working in a chemical factory may get affected due to presence of certain chemicals. Some types of occupational hazards are :

Physical hazards, chemical hazards, biological hazards, , behavioural hazards, radiological hazards, ergonomic hazards etc.

air and Water Quality Monitoring

In any organisation it is necessary to maintain a good air quality to improve the working capabilities of employees. A pollution free air is an essential requirement for any organisation.

Guidelines for Clean Air and Clean Water

A proper guidelines may be followed by organisation to keep the surrounding air and water clean. Some of the points of such guidelines can be.

1. Air pollution is mostly caused by production of the dust, mixture of solid particles and gases in the surrounding air. So avoid dust production, generation of solid particles and gases in the air.

2. Extensive use of automobile vehicles in the campus can lead to the air pollution. So organisation must use limited number of vehicles to avoid air pollution. Practice a no vehicle day in every week.

3. Ozone produced in the air can pollute the air. Many times it is called as a smog. The generation of ozone gas must be kept at low level by the organisation.

4. Most of the human activities pollute the surrounding water. The sewage or the waste water can also cause the water pollution. Take care that their waste is not mixed with the surrounding water.

5. Extensive use of fertilizers and pesticide must be avoided as it can make the ground water polluted.

Office ergonomics 

Ergonomics is the science concerned with designing and arranging things so that people can use them easily and safely. Applying ergonomics can reduce the potential for accidents, injury to improve performance and productivity. In an office setting, the repetition of a seemingly innocuous task over a period of time can cause an injury. 

Computer Health and Safety Tips

With the increase use of computer, several health and safety issues related to vision, musculoskeletal issues, body aches and pains may occur. Many of these issues are preventable and if incurred are temporary. They can be resolved by adopting simple corrective action.

® Musculoskeletal Problems

This problem include different areas of your body, such as neck, back, chests, arms shoulders and feet. It occurs because of your wrong posture, uncomfortable chair for sitting that is not ergonomically correct while working on the computer.


® Occupational Overuse Syndrome

Occupational overuse syndrome, also known as repetition strain injury (RSI), is a collective term for a range of conditions, characterised by discomfort or persistent pain in muscles, tendons and other soft tissues.


® Strain in Legs and Feet

Sitting to work for long time may cause strain in legs.Position your desk chair to sit comfortably with your feet flat on the floor and your lower legs vertical. Use a footrest for more support. Make sure that there’s enough space to change position and stretch your legs out every now and then, too.

® Eye Strain

Computer’s bright light, glare and flickering images can cause eye strain and visual fatigue. When you constantly focus on screen, you forget about blinking your eyes that can cause of drying eyes. 


Open office calc

Spreadsheet notes class 10 ЁЯСИЁЯСИ 

ЁЯСЖCLICK hereЁЯСЖ

What do you mean by Spreadsheet

A spreadsheet is a computer application for computation, organization, analysis and storage of data in tabular form. Spreadsheets were developed as computerized analogs of paper accounting worksheets. The program operates on data entered in cells of a table. Each cell may contain either numeric or text data, or the results of formulas that automatically calculate and display a value based on the contents of other cells. A spreadsheet may also refer to one such electronic document.

What do you mean by Open office Calc
Open Office Calc is an electronic powerful spreadsheet program used to record and analyze numerical and statistical data with formulas and functions. Open office calc extension is .ods

Worksheet and workbook
A worksheet is a single page spreadsheet or page.
A workbook is just a book. The workbook consists of one or more worksheets, having various sorts of related information.

Cell
A cell is the intersection of a row and a column. In other words, it's where a row and column meet.

Some basic functions 

1. SUM Function
The sum function is the most used function when it comes to computing data on Excel. This function works to sum a group of numbers in a specific set of cells.
Syntax:-    =SUM(number1, number2, etc.).

2. AVERAGE Function

The average function is an extremely useful tool for getting the average value in a range of cells. Like the sum function, it is frequently used in computing and analyzing data on spreadsheet. 
Syntax:-  =AVERAGE (number1, number2, etc.).
3. MAX  Function
Excel MAX function is categorized under statistical functions in Microsoft Excel. The Excel MAX Formula is used to find out the maximum value from a given set of data/ array. MAX function in Excel returns the highest value from a given set of numeric values.
Syntax:- =MAX(A1:D5)

4. MIN function
The MIN function returns the smallest numeric value in the data provided. The MIN function can be used to return the smallest value from any type of numeric data. 
Syntax :- =MIN(A1:D5)

5. COUNT function
The COUNT function counts the number of cells that contain numbers, and counts numbers within the list of arguments. Use the COUNT function to get the number of entries in a number field that is in a range or array of numbers.
Syntax:- =COUNT(A1:D5)
6. IF function
The IF function is one of the most popular functions in Excel, and it allows you to make logical comparisons between a value and what you expect.
So an IF statement can have two results. The first result is if your comparison is True, the second if your comparison is False.

For example, =IF(C2="60",Pass, Fail) says IF(C2 = 60, then return Pass, otherwise return Fail).

Freezing and Unfreezing rows and columns
Freezing locks number of rows at the top of a spreadsheet or number of columns on the left of a spreadsheet or both. Frozen columns and rows remain the view during scroling, whereas other rows and columns gets scrolled.

Freezing rows or columns:

1. Click on the Header for the row below where to the freeze or for the column to the right of where to freeze.

2. Choose the Window -> Freeze. A dark line appears, indicating where the freeze is put.

Hide a row/Column
When elements are hidden, they are neither visible nor printed, but can still be selected for copying if you select the elements around them.

• To hide a row/column, first select the row/column, and then use menu options,

• Format → Row → Hide or Format → Column → Hide to hide row and column respectively.

To show the hidden row / column, choose Format→ Row → Show or Format →Column → Show
(or)

• Right-click and choose Show from pop-up menu.


What do you mean by Charts?

 A chart is a graphical representation of data. Charts allow users to see what the results of data to better understand and predict current and future data.

Types of charts
There are a wide variety of charts available to display data.

Bar
chart
Column
sparklines
Line chart
Pie chart
Point chart
Bubble chart
Scatter

Creating Chart
1. Select the cells that contain the data that you want to present in your chart.

2. Click the Insert->Chart option or click Insert Chart icon 

 on the Standard toolbar.


3. The Chart Wizard has three main parts:

4. Choose a Chart type and its option type. Then click Next button.



5. In the Data Series list box contains a list of all data series in the current chart.

•  To organize the data series, select an entry in the list.
• Then click Next button




6. On the Chart Elements page, chart a title and, if desired, a subtitle.

Click on Finish



History of Computer

History of Computer
Computer
A computer is an electronic device or machine which takes input from user, stored it into memory and then process the data and after processing it gives meaningful result to the user.”


рдХंрдк्рдпूрдЯрд░ рдХा рд╡िрдХाрд╕ 16 рд╡ीं рд╢рддाрдм्рджी рд╕े рд╢ुрд░ू рд╣ो рдЧрдпा рдеा, рдХंрдк्рдпूрдЯрд░ рдХे рд╡िрдХाрд╕ рдоें рддेрдЬी рд╕े рдмрджрд▓ाрд╡ рдЖрдпा рд╣ै। рдк्рд░рдд्рдпेрдХ рдкीрдв़ी рдХे рдмाрдж, рдХंрдк्рдпूрдЯрд░ рдХे рдЖрдХाрд░-рдк्рд░рдХाрд░, рдХाрд░्рдпрдк्рд░рдгाрд▓ी рдФрд░ рдХाрд░्рдпрд╢ीрд▓рддा рдоें рдмрд╣ुрдд рд╕ुрдзाрд░ рд╣ुрдЖ рд╣ै। рд╡рд░्рддрдоाрди рдХे рдХंрдк्рдпूрдЯрд░ рдХाрдлी рдЖрдзुрдиिрдХ рдФрд░ рд╡िрдХрд╕िрдд рд╣ै।
ABACUS рдЧрдгрдиा рдХрд░рдиे рд╡ाрд▓ी рдкрд╣рд▓ी рдорд╢ीрди рдмрдиाрдИ рдЧрдпी, рдЗрд╕рдХे рдж्рд╡ाрд░ा рдмреЬे рдмреЬे рдЧрдгिрддीрдп рдЧрдгрдиा рдХो рдЖрд╕ाрдиी рд╕े solve рдХिрдпा рдЬाрддा рдеा, рдЗрд╕े Calculating tool рднी рдХрд╣ा рдЬाрддा рд╣ै рдЗрд╕рдоें рдмрд╣ुрдд рд╕ाрд░े рдЫреЬ рдоोрддिрдпों рд╕े рднрд░े рд╣ोрддे рдеे рдФрд░ рдоोрддिрдпों рдХे рдлिрд╕рд▓ा рдХрд░ рдХे рдЧрдгिрддीрдп рдЧрдгрдиा рдХिрдпा рдЬाрддा рдеा рд╕рди 1616 рдИ. рдоें, John Napier (рдЬॉрди рдиेрдкिрдпрд░) рдиे рдПрдХ device рдмрдиाрдпा рдЬिрд╕рдХा рдиाрдоNapier’s Bones” рджिрдпा
рдЪाрд░्рд▓्рд╕ рдмैрдмैрдЬ (Charles Babbage) рдХो рдХंрдк्рдпूрдЯрд░ рдХा рдЬрдирдХ рдФрд░ рдХंрдк्рдпूрдЯрд░ рдХा рдкिрддा (Father of computer) рдХрд╣ा рдЬाрддा рд╣ै, рдХ्рдпोंрдХि рдЗрди्рд╣ोрдиे рд╣ी рд╕рдмрд╕े рдкрд╣рд▓ा mechanical general-purpose computer рдмрдиाрдпा рдеा| рдЗрди्рд╣ोрдиे Analytical Engine рдХो 1837 рдИ. рдоें рдмрдиाрдпा рдеा| рдЗрд╕ рдХ्рд░рдо-рд╡िрдХाрд╕ рдХी рдЕрд╡рдзि рдХे рджौрд░ाрди, рдХंрдк्рдпूрдЯрд░ рдоें рдХाрдлी рдкрд░िрд╡рд░्рддрди рдЖрдП рд╣ैं। рдЬिрд╕рдиे рдХंрдк्рдпूрдЯрд░ों рдХी рдирдИ рдкीрдвीрдпों рдХो рдЬрди्рдо рджिрдпा рд╣ै рдФрд░ рд╡िрднिрди्рди рдк्рд░рдХाрд░ рдХे рдХंрдк्рдпूрдЯрд░ों рдХा рдЖрд╡िрд╖्рдХाрд░ рд╣ुрдЖ рд╣ै।
 рдЬिрд╕े рд╣рдо рдЬрдирд░ेрд╢рди рдСрдл рдХंрдк्рдпूрдЯрд░ (Generation of Computer ) рдХे рдиाрдо рд╕े рдЬाрдирддे рд╣ै рдФрд░ рдЗрд╕े рдХрдо्рдк्рдпूрдЯрд░ рдХी рд╡िрднिрди्рди рдкीрдв़िрдпों рдоें рд╡िрднाрдЬिрдд рдХिрдпा рдЧрдпा рд╣ै।
рдкрд╣рд▓ी рдкीрдв़ी рдХे рдХंрдк्рдпूрдЯрд░ (1940 – 1956)
рджूрд╕рд░ी рдкीреЭी рдХे рдХंрдк्рдпूрдЯрд░ (1956 1963)
рддीрд╕рд░ी рдкीреЭी рдХे рдХंрдк्рдпूрдЯрд░ (1964 1971)
рдЪौрдеी рдкीреЭी рдХे рдХंрдк्рдпूрдЯрд░ (1971 1980)
рдкांрдЪрд╡ीं рдкीреЭी рдХे рдХंрдк्рдпूрдЯрд░ (рд╡рд░्рддрдоाрди рдФрд░ рднрд╡िрд╖्рдп)