Microcontroller Based Bidirectional Visitor Counter

ConstruCtion Microcontroller-bAsed bidirectionAl Visitor counter UMAR SUNIL K ? AkshAy MAthur, kuldeep singh nAglA V isitor counting is simply a measurement of the visitor traffic entering and exiting offices, malls, sports venues, etc. Counting the visitors helps to maximise the efficiency and effectiveness of employees, floor area and sales potential of an organisation.Visitor counting is not limited to Semiconductors: IC1 – LM324 quad op-amp IC2 – 74LS76 J-K flip-flop IC3 – AT89C52 microcontroller IC4 – 7805 5V regulator T1, T2 – L14F1 npn phototransistor T3, T4 – 2N3904 npn transistor IR TX1, IR TX2 – IR transmitting LED BR1 – 1A bridge rectifier DIS1-DIS3 – LTS543 CC 7-segment display Resistors (all ? -watt,  ±5% carbon): R1, R2 – 68-ohm R3, R4 – 6. 8-kilo-ohm R5, R6 – 100-ohm R7, R8, R10, R11 – 10-kilo-ohm R9 – 4. 7-kilo-ohm R12-R32 – 220-ohm VR1, VR2 – 20-kilo-ohm preset RNW1 – 10-kilo-ohm resistor network Capacitors: C1, C2 C3, C4 C5 C6 C7 Miscellaneous: XTAL X1 S1 S2 – 0.  µF ceramic disk – 33pF ceramic disk – 10 µF, 16V electrolytic – 470 µF, 25V electrolytic – 0. 1 µF ceramic disk – 12MHz crystal – 230V primary to 7. 5V, 250mA secondary transformer – Push-to-on switch – On/off switch Fig. 1: Transmitter-receiver set-up at the entrance-cum-exit of the passage Parts List the entry/exit point of a company but has a wide range of applications that provide information to management on the volume and flow of people throughout a location. A primary method for counting the visitors involves hiring human auditors to stand and manually tally the number of visitors who pass by a certain location.But human-based data collection comes at great expense. Here is a low-cost microcontrollerbased visitor counter that can be used to know the number of persons at a place. All the c omponents required are readily available in the market and the circuit is easy to build. Two IR transmitter-receiver pairs are used at the passage: one pair comprising IR transmitter IR TX1 and receiver phototransistor T1 is installed at the entry point of the passage, while the other pair comprising IR transmitter IR TX2 and phototransistor T2 is installed at the exit of the passage.The IR signals from the IR LEDs should continuously fall on the respective phototransistors, so proper orientation of the transmitters and phototransistors is necessary. circuit description Fig. 1 shows the transmitter-receiver set-up at the entrance-cum-exit of the passage along with block diagram. Two similar sections detect interruption of the IR beam and generate clock pulse for the microcontroller. The microcontroller controls counting and displays the number of persons present inside the hall. Fig. 2 shows the circuit of the microcontroller-based visitor counter, wherein the transmitter and the re ceiver form the IR detection circuit.Control logic is built around transistors, operational amplifier LM324 (IC1) and flip-flop (IC2). When nobody is passing through the entry/exit point, the IR beam continuously falls on phototransistor T1. Phototransistor T1 conducts and the high voltage at its emitter drives transistor T3 into saturation, which makes pin 3 of comparator N1 low and finally output pin 1 of comparator N1 is high. Now if someone enters the place, first the IR beam from IR TX1 is interrupted and then the IR beam from IR TX2. When the beam from IR TX1 is interrupted, phototransistor T1 and transistor T3 cut-off and pin 3 of comparator N1 goes high.The low output (pin 1) of comparator N1 provides negative trigger pulse to pin 1 of J-K flip-flop IC2(A). At this moment, the high input at ‘J’ and ‘K’ w w w. e f y m ag . co m 7 8 †¢ J a n ua ry 2 0 0 7 †¢ e l e c t ro n i c s f o r yo u ConstruCtion w w w. e f y m ag . co m e l e c t ro n i c s f o r yo u †¢ J a n ua ry 2 0 0 7 †¢ 7 9 Fig. 2: Circuit of the microcontroller-based visitor counter ConstruCtion Fig. 3: Power supply circuit pins of flip-flop IC2(A) toggles its output to low. On the other hand, the low input at ‘J’ and ‘K’ pins of IC2(B) due to Fig. : Pin clock pin 1 of configuration of L14F1 and IC2(A) and ‘J’ intransistor 2N3904 put (pin 9) and ‘K’ input (pin 12) of IC2(B) are connected to pin 1 of comparator N1. The negative-going pulse is applied to clock pin 6 of IC2(B) when the person interrupts the IR beam from IR TX2. There is no change in the output of IC2(B) flip-flop. This triggers the external interrupt INT0 (pin 12) of microcontroller AT89C52. The AT89C52 is an 8-bit microcontroller with 8 kB of flash-based program memory, 256 bytes of RAM, 32 input/output lines, three 16-bit timers/counters, on-chip oscillator and clock circuitry.A 12MHz crystal is used for providing clock. Ports 0, 1 and 2 are configured for 7-segment displays. Port-0 pin is externally pulled up with 10-kilo-ohm resistor network RNW1 because port0 is an 8-bit, open-drain, bidirectional, input/output (I/O) port. Port-1 and port-2 are 8-bit bidirectional I/O ports with internal pull-ups (no need of external pull-ups). Port pins 3. 0 and 3. 1 are configured to provide the set pulse to J-K flip-flops IC2(A) and IC2(B), respectively. External interrupts INT0 and INT1 receive the interrupt pulse when the person interrupts the IR beams.Resistor R9 and capacitor C5 provide power-on-reset pulse to the microcontroller. Switch S1 is used for manual reset. When the microcontroller is re- set, the flip-flops are brought in ‘set’ state through the microcontroller at software run time by making their ‘set’ pin high for a moment. The value of the counter increments by Fig. 5: An actual-size, single-side PCB for the microcontroller-based visitor ‘1’ when the counter (F ig. 2) including its power supply (Fig. 3) interrupt service routine for INT0 is executed.The output of the corresponding J-K flip-flop is set to ‘high’ again by making its ‘set’ input pin low through the microcontroller. The micro-controller is configured as a negative-edgetriggered interrupt sensor. Similarly, if somebody exits the place, first the IR beam from IR TX2 is interrupted and then the IR beam from IR TX1. When Fig. 6: Component layout for the PCB the beam from IR TX2 is interrupted, output pin provides clock pulse to pin 6 of J-K 7 of comparator N2 goes low. This flip-flop IC2(B). w w w. e f y m ag . co m 8 0 †¢ J a n ua ry 2 0 0 7 †¢ e l e c t ro n i c s f o r yo u ConstruCtionAt this moment, the high input at ‘J’ and ‘K’ pins of flip-flop IC2(B) toggles its output to low. On the other hand, the low input at ‘J’ and ‘K’ pins of IC2(A) due to clock pin 6 of IC2(B) and ‘Jâ€℠¢ input (pin 4) and ‘K’ input (pin 16) of IC2(A) are connected to pin 7 of comparator N2. The negative-going pulse is applied to clock pin 1 of IC2(A) when the person interrupts the IR beam from IR TX1. There is no change in the output of IC2(A) flip-flop. This triggers the external interrupt INT1 (pin 13) of microcontroller AT89C52. The value of the counter decrements by ‘1’ when interrupt service routine for INT1 is executed.The output of the corresponding J-K flip-flop is set to ‘high’ again by making its ‘set’ input pin low through the microcontroller. The circuit is powered by regulated 5V. Fig. 3 shows the circuit of the power supply. The AC mains is stepped down by transformer X1 to deliver secondary output of 7. 5V, 250mA, which is rectified by bridge rectifier BR1, filtered by capacitor C6 and regulated by IC 7805 (IC4). Capacitor C7 bypasses any ripple in the regulated output. 3) is shown in Fig. 5 and its component layou t in Fig. 6. software The software for the visitor counter is written in ‘C’ language and compiled using C51 Keil compiler.The demo version of this compiler is available for free on the website ‘www. keil. com. ’ It can compile programs up to 2 kB only, which is sufficient for writing most programs. EFY note. The source code and other relevant files of this article have been included in this month’s EFY-CD. construction An actual-size, single-side PCB for the microcontroller-based visitor counter (Fig. 2) including its power supply (Fig. visitor. c #include int i=0,j,k,l,m,a[]={63,6,91,79,102,109,125,7,127,111}; void enter (void) interrupt 0 { i++; if(i>999) i=999; P3_1=0; for(m=0;m Microcontroller Based Bidirectional Visitor Counter ConstruCtion Microcontroller-bAsed bidirectionAl Visitor counter UMAR SUNIL K ? AkshAy MAthur, kuldeep singh nAglA V isitor counting is simply a measurement of the visitor traffic entering and exiting offices, malls, sports venues, etc. Counting the visitors helps to maximise the efficiency and effectiveness of employees, floor area and sales potential of an organisation.Visitor counting is not limited to Semiconductors: IC1 – LM324 quad op-amp IC2 – 74LS76 J-K flip-flop IC3 – AT89C52 microcontroller IC4 – 7805 5V regulator T1, T2 – L14F1 npn phototransistor T3, T4 – 2N3904 npn transistor IR TX1, IR TX2 – IR transmitting LED BR1 – 1A bridge rectifier DIS1-DIS3 – LTS543 CC 7-segment display Resistors (all ? -watt,  ±5% carbon): R1, R2 – 68-ohm R3, R4 – 6. 8-kilo-ohm R5, R6 – 100-ohm R7, R8, R10, R11 – 10-kilo-ohm R9 – 4. 7-kilo-ohm R12-R32 – 220-ohm VR1, VR2 – 20-kilo-ohm preset RNW1 – 10-kilo-ohm resistor network Capacitors: C1, C2 C3, C4 C5 C6 C7 Miscellaneous: XTAL X1 S1 S2 – 0.  µF ceramic disk – 33pF ceramic disk – 10 µF, 16V electrolytic – 470 µF, 25V electrolytic – 0. 1 µF ceramic disk – 12MHz crystal – 230V primary to 7. 5V, 250mA secondary transformer – Push-to-on switch – On/off switch Fig. 1: Transmitter-receiver set-up at the entrance-cum-exit of the passage Parts List the entry/exit point of a company but has a wide range of applications that provide information to management on the volume and flow of people throughout a location. A primary method for counting the visitors involves hiring human auditors to stand and manually tally the number of visitors who pass by a certain location.But human-based data collection comes at great expense. Here is a low-cost microcontrollerbased visitor counter that can be used to know the number of persons at a place. All the c omponents required are readily available in the market and the circuit is easy to build. Two IR transmitter-receiver pairs are used at the passage: one pair comprising IR transmitter IR TX1 and receiver phototransistor T1 is installed at the entry point of the passage, while the other pair comprising IR transmitter IR TX2 and phototransistor T2 is installed at the exit of the passage.The IR signals from the IR LEDs should continuously fall on the respective phototransistors, so proper orientation of the transmitters and phototransistors is necessary. circuit description Fig. 1 shows the transmitter-receiver set-up at the entrance-cum-exit of the passage along with block diagram. Two similar sections detect interruption of the IR beam and generate clock pulse for the microcontroller. The microcontroller controls counting and displays the number of persons present inside the hall. Fig. 2 shows the circuit of the microcontroller-based visitor counter, wherein the transmitter and the re ceiver form the IR detection circuit.Control logic is built around transistors, operational amplifier LM324 (IC1) and flip-flop (IC2). When nobody is passing through the entry/exit point, the IR beam continuously falls on phototransistor T1. Phototransistor T1 conducts and the high voltage at its emitter drives transistor T3 into saturation, which makes pin 3 of comparator N1 low and finally output pin 1 of comparator N1 is high. Now if someone enters the place, first the IR beam from IR TX1 is interrupted and then the IR beam from IR TX2. When the beam from IR TX1 is interrupted, phototransistor T1 and transistor T3 cut-off and pin 3 of comparator N1 goes high.The low output (pin 1) of comparator N1 provides negative trigger pulse to pin 1 of J-K flip-flop IC2(A). At this moment, the high input at ‘J’ and ‘K’ w w w. e f y m ag . co m 7 8 †¢ J a n ua ry 2 0 0 7 †¢ e l e c t ro n i c s f o r yo u ConstruCtion w w w. e f y m ag . co m e l e c t ro n i c s f o r yo u †¢ J a n ua ry 2 0 0 7 †¢ 7 9 Fig. 2: Circuit of the microcontroller-based visitor counter ConstruCtion Fig. 3: Power supply circuit pins of flip-flop IC2(A) toggles its output to low. On the other hand, the low input at ‘J’ and ‘K’ pins of IC2(B) due to Fig. : Pin clock pin 1 of configuration of L14F1 and IC2(A) and ‘J’ intransistor 2N3904 put (pin 9) and ‘K’ input (pin 12) of IC2(B) are connected to pin 1 of comparator N1. The negative-going pulse is applied to clock pin 6 of IC2(B) when the person interrupts the IR beam from IR TX2. There is no change in the output of IC2(B) flip-flop. This triggers the external interrupt INT0 (pin 12) of microcontroller AT89C52. The AT89C52 is an 8-bit microcontroller with 8 kB of flash-based program memory, 256 bytes of RAM, 32 input/output lines, three 16-bit timers/counters, on-chip oscillator and clock circuitry.A 12MHz crystal is used for providing clock. Ports 0, 1 and 2 are configured for 7-segment displays. Port-0 pin is externally pulled up with 10-kilo-ohm resistor network RNW1 because port0 is an 8-bit, open-drain, bidirectional, input/output (I/O) port. Port-1 and port-2 are 8-bit bidirectional I/O ports with internal pull-ups (no need of external pull-ups). Port pins 3. 0 and 3. 1 are configured to provide the set pulse to J-K flip-flops IC2(A) and IC2(B), respectively. External interrupts INT0 and INT1 receive the interrupt pulse when the person interrupts the IR beams.Resistor R9 and capacitor C5 provide power-on-reset pulse to the microcontroller. Switch S1 is used for manual reset. When the microcontroller is re- set, the flip-flops are brought in ‘set’ state through the microcontroller at software run time by making their ‘set’ pin high for a moment. The value of the counter increments by Fig. 5: An actual-size, single-side PCB for the microcontroller-based visitor ‘1’ when the counter (F ig. 2) including its power supply (Fig. 3) interrupt service routine for INT0 is executed.The output of the corresponding J-K flip-flop is set to ‘high’ again by making its ‘set’ input pin low through the microcontroller. The micro-controller is configured as a negative-edgetriggered interrupt sensor. Similarly, if somebody exits the place, first the IR beam from IR TX2 is interrupted and then the IR beam from IR TX1. When Fig. 6: Component layout for the PCB the beam from IR TX2 is interrupted, output pin provides clock pulse to pin 6 of J-K 7 of comparator N2 goes low. This flip-flop IC2(B). w w w. e f y m ag . co m 8 0 †¢ J a n ua ry 2 0 0 7 †¢ e l e c t ro n i c s f o r yo u ConstruCtionAt this moment, the high input at ‘J’ and ‘K’ pins of flip-flop IC2(B) toggles its output to low. On the other hand, the low input at ‘J’ and ‘K’ pins of IC2(A) due to clock pin 6 of IC2(B) and ‘Jâ€℠¢ input (pin 4) and ‘K’ input (pin 16) of IC2(A) are connected to pin 7 of comparator N2. The negative-going pulse is applied to clock pin 1 of IC2(A) when the person interrupts the IR beam from IR TX1. There is no change in the output of IC2(A) flip-flop. This triggers the external interrupt INT1 (pin 13) of microcontroller AT89C52. The value of the counter decrements by ‘1’ when interrupt service routine for INT1 is executed.The output of the corresponding J-K flip-flop is set to ‘high’ again by making its ‘set’ input pin low through the microcontroller. The circuit is powered by regulated 5V. Fig. 3 shows the circuit of the power supply. The AC mains is stepped down by transformer X1 to deliver secondary output of 7. 5V, 250mA, which is rectified by bridge rectifier BR1, filtered by capacitor C6 and regulated by IC 7805 (IC4). Capacitor C7 bypasses any ripple in the regulated output. 3) is shown in Fig. 5 and its component layou t in Fig. 6. software The software for the visitor counter is written in ‘C’ language and compiled using C51 Keil compiler.The demo version of this compiler is available for free on the website ‘www. keil. com. ’ It can compile programs up to 2 kB only, which is sufficient for writing most programs. EFY note. The source code and other relevant files of this article have been included in this month’s EFY-CD. construction An actual-size, single-side PCB for the microcontroller-based visitor counter (Fig. 2) including its power supply (Fig. visitor. c #include int i=0,j,k,l,m,a[]={63,6,91,79,102,109,125,7,127,111}; void enter (void) interrupt 0 { i++; if(i>999) i=999; P3_1=0; for(m=0;m

Global Warming effect on Hair care Industry Essay

â€Å"It is the gradual increase of the temperature of the atmosphere near the earth’s surface as a result of the increase of what we call â€Å"greenhouse gases† since the industrial revolution. Those gases are, water vapor, Carbon Dioxide,Methane,Nitrous Oxides and Ozone† (â€Å"Global Warming† ). This phenomenon is considered a healthy natural procedure because, when the light from the sun hit the earth’s surface reflects off this surface toward space ,but doesn’t easily pass through the greenhouse gases blanket of the earth. Some of the sun’s light and heat are trapped keeping the planet at an average temperature suitable to life, which is about sixty degrees Fahrenheit(â€Å"Global Warming† ). As we said ,Global Warming as a natural process is not harmful, but the growth in industry,agriculture,transportation and technology revolution has produced additional quantities of greenhouse gases along with other harmful substances such as â€Å"Chlorofluorocarbons† or â€Å"The CFCs† (â€Å"Global Warming† ). That made earth’s atmosphere traps more heat and light than it is required, so earth is facing a dangerous future with scientists predictions of high temperature ages to be coming. Global warming has a long term effects on our planet. Some of those results are, Melting of polar ice with a resulting rise in sea level and coastal flooding; disruption of drinking water supplies ;profound changes in agriculture due to climate change; extinction of species as ecological niches disappear; and an increased of tropical diseases(Girardet 19). We may consider some global warming effect as following: †¢ Greenhouse gases are accumulating in earth’s atmosphere as a result of human activities, causing temperatures to rise. Global average temperatures warmed by about 1 ° F in the twentieth century and could increase by 2. 5 ° F to 10. 5 ° F in this century(Speth 56). †¢ Human-induced warming and sea-level rise are expected to continue throughout this century and into the next(Speth 56). †¢ This warming is caused by the cumulative effects of several greenhouse gases that have built up steadily in the atmosphere, including carbon dioxide from fossil fuel combustion and deforestation, methane from fossil fuels and agricultural activities, nitrous oxide from agricultural activities and the chemical industry, and specialty chemicals including CFCs(Speth 56). †¢ Global warming could well have serious adverse societal and ecological impacts by the end of this century, and temperature and sea levels could also continue to rise well into the next century even if societies stabilize the levels of greenhouse gases in the atmosphere(Speth 56) Hair care industry tools â€Å"Every woman knows how you look is essential to how you feel† (Make a date with your hair 73) No. 1 women magazine â€Å"Cosmopolitan† started an article with that word. Hair dressing is essential to all women on this planet. What ever you men laugh or criticize, they will still go to coiffures and hair dresser all over the world. Also men are not far from hair care. Men nowadays care a lot about how do they look like and hair look became essential for them too. More products are produced and invented every day to help those stylists to accomplish good looking hair cut and a soft ,long and strong hair texture for every woman. Every hair stylist, uses some essential products such as: †¢ Shampoos: They are used in washing and cleaning scalps and hair from dirt and moist. They remove unwanted amounts of oils with substances called â€Å"Surfactants† that produces foam. The most famous surfactants are, â€Å"Sodium Laureth Sulphate† and â€Å"Sodium lauryl sulphate†,which are written on every shampoo bottle. They considered harmful (Burke) . Some kinds of natural oils are used in making shampoos. Anti-dandruf kind of shampoos are using substances like Ketoconazole,Selenium sulfite or ZPT(Doctor NDTV). †¢ Conditioners: They are used in softening hair after washing it with shampoo. Conditioners coat the hair with protective material such as silicone making the hair feel softer, shiny and less likely to tangle. Silicones are the base substance in making conditioner along with natural oils such as shampoos(Burke ). †¢ Hair dryer, curling irons and hair crimpers: Those are electric devices used to dry wet and curling it using hot air blowout . They produce heat and consume more electricity ,and it may cause damage to hair if heat was high. Many kinds of those gadgets are designed to produce more heat to style thick strands of hair(Sloane ). †¢ Hair sprays and hair gels: These products are using many different kinds of polymers used to sustain the hair’s look and keep it stable (Make a date with your hair 73). †¢ Hair dyes: Products that are used to change the color of hair for many weeks. Bleaching is achieved by oxidation with â€Å"Hydrogen Peroxide† (Hocker and Popescu 36). †¢ Hair cut equipments: Like scissors,clippers,electric trimmers, brushes and combs. Every day millions of men and women all over the globe is cutting and brushing their hair. Every time that happen ,lots of hair are lost ,removed and thrown a way. Hair Chemistry â€Å"Biologically, hair is the filamentous appendage on the skin of mammals. Chemically, it is a composite material in which both the reinforcing fibers and the matrix are made of proteins† (Hocker and Popescu 36). Hair fibers, roughly cylindrical with diameters ranging from 10 µm to 100 µm, are multicellular tissues. The heart of the fiber is surrounded by the cuticle, made of plate-like overlapping cells whose heights can reach up to 1 µm. Each cuticle cell has four layers: the epicuticle; the a-layer; the exocuticle; and the endocuticle. Inside the cuticle, the cortex contains spindle-like interlocking cortical cells, with cell membrane complex in-between. Each cortical cell is composed of macrofibrils embedded in an intermacrofibrillar material. Each macrofibril consists of microfibrils, called the intermediate filaments (IF), themselves embedded in an intermicrofibrillar matrix composed of intermediate filament associated proteins (IFAP). Thus, hair is a composite material with a complex dual structure at all levels(Hocker and Popescu 36). In brief, elemental analysis of hair shows, remarkably independently of hair origin, 50wt% carbon, 7wt% hydrogen, 22wt% oxygen, 16wt% nitrogen and 5wt% sulfur(Hocker and Popescu 36). Global warming effects that relate to Hair care industry Global warming especially alarms bioenvironmentalists and social greens, because the three main greenhouse gases (carbon dioxide, methane, and nitrous oxide) arise from core economic activities (automobile use, electricity generation, factories, agriculture, and deforestation),while the main consequences (rising seas, severe storms, drought, and desertification) are beyond the lifetimes of politicians and business leaders—perhaps occurring in 50 to 100 years. And the impacts, when they are most severe, will be mostly felt by the poor, marginalized peoples of the world. Obviously, lowering greenhouse gas emissions will involve major changes to global economic production and consumption patterns (Clapp and Dauvergne 39) not only hair care industry in the near future. It will require, too, governmental, corporate, and personal sacrifices. It’s known now that a huge part of earth’s warming is due to human activity. Humens are destroying the planet and global warming is one way for that. Global warming has many bad effects as we briefed earlyier. It’s more likely to discuss how hair care industry affecting the global warming . It what was announced by Al Gore, American former vise-president and Nobel Prize winner in Bali climate conference held this month that hair cuts and thrown away hair cutting decay, give massive amounts of green house gases, which contributes to the severe global warming crisis. They wanted us to go baldy (â€Å"Al Gore Finds New cause of Global Warming†). We will discuss how global warming affect the hair care industry with all the climate change criteria and harmful gases found in the air . A different point of view but a remarkable one to study. Environmental scientists predict that, from global warming of 0. 8 °Ã¢â‚¬â€œ2. 0 °C will â€Å"commit† 18–35 percent of animal and plant species â€Å"to extinction† by the middle of the twenty first century (Clapp and Dauvergne 35). Plants are the main source for natural oils and substances used in making hair products such as, Cacao extracts, Grape seed oil, roses, safflower and even bananas. Tropical plants are the most used in this industry. Global warming effect on those plants are very svere, so that hair care products are having problems in getting its raw mterials. Many surfactants for example are derived from plant oils like coconut or palm kernel (Hargreaves). Even if hair products company are saying they don’t use animals in their experiments, they still use them and with the bad effect of climate over different animal species, Those companies will not be able to develop their future products. Global warming is a result of what we called greenhouse gases(â€Å"Global warming†) . Some of them are harmful gases like,Cabon dioxide, nitrous oxides and Ozone(not the ozone type in the upper atmosphere). If we study the situation of every gas we may find that, higher concentrations of carbon dioxide—could mean an even higher rate of extinctions of animal and plants species, because they breathe Oxygen just like we do and as we said before that may lead to less natural products for hair care industry and less development to those products(Clapp and Dauvergne 54). In the air, nitrogen oxide from fossil fuel combustion reacts with volatile hydrocarbons and sunlight to produce smog, a nasty mix of photochemical oxidants, one of which is ozone (Speth 72) and according to hair chemical composition, hair absorbs moisture due to the polar amino acid residues of the inside of the hair (Hocker and Popescu 36), this cause harm to hair, which make it essential to repeat hair treatment processes and it may cause hair and scalp disease. Nitrogen Oxides can also become nitric acid and contribute to acid deposition through acid rains, which also contains harmful substances to hair health (Speth 45) . Acid rain is also a cause for water supply pollution due to rain falling on open water sources such as rivers and lakes, Polluting water sources may directly affect the hair care industry, due to the daily use of water in washing hair for probably every one. Acid rain coming from Nitrogen Oxides may pollute soil, forests, and crops (Speth 86) and of course making the same effect on plants and animals that are essential to hair care industry. Acid rains made thousands of lakes have â€Å"gone acid† (Speth 53), that means any kind of swimming of any of those lakes or water area contaminated by acids may cause hair loss or diseases. After a few years, scientists predict that global warming will cause shortage in universal water supplies . that may cause less water washing habits (Elsworth), less hygiene and of course it may cause diseases. Global warming is making the atmosphere on earth hotter than before (Girardet 19) and sunlight concentration is one of the most harmful effects on human’s health. Skin cancers are believed to be caused mainly by sunlight . Skin cancers may spread over the body even into hair scalp, causing severe hair loss (Armstrong 141-55). Losing hair for both men and women are emotionally destructive, so both of them may use hair wags or artificial hair parts to cover there baldness. Some kinds of skin rashes due to water or air pollution with green house gases may cause hair loss also(Doctor NDTV). Climate change ,high humidity ratios and long time sunlight effects are all factors that can injure the hair or make them very dry (Doctor NDTV)and of course that what would global warming do. Attitudes toward Global Warming and their effects Men and women and even Hair care companies started a new attitude in dealing with global warming and climate change problem. First of all, we must admit that hair care products with all their chemical materials, packaging bottles and even the misusage of these products are a big problem causing more and more environmental threats. Government started putting some regulations and laws to fight global warming increase . Hair products companies that still use harmful ingredients such as ,Sodium Laureth sulphate and sodium lauryl sulphate [they are found to be a cause for some kinds of cancers]( â€Å"SLES†),started searching for natural alternatives to use in shampoos, conditioners and any other products. Companies are increasingly becoming aware of environmental issues . Some companies are now trying to use technology in making hair products with excellent suspending power, low freezing point and wide thermal stability range(-5 ° C to 50 ° C) (Burke ),so that they may survive the global warming bad effects. Companies also targets to make new products with reduced environmental impact over the upcoming years, in an attempt to improve the environmental profile of its products and their packaging materials by reducing CO2 emissions, energy and water consumption used to make those products. Some of those companies continue with some environmental projects like Children’s Safe Drinking Water Program done by P&G hair Products Company (Product & supplier news). Governments also put under Current pressure to move away from non-renewable petroleum feed stocks and towards plants as sources of raw materials, which has led to a lot of effort on developing surfactants from oleo chemical feed stocks. Many recently-developed surfactants are an attempt to satisfy the modern consumers’ desire for products to be ‘more natural'(Hargreaves). The elimination of Chlorofluorocarbons (â€Å"Global Warming†) is also another effort to decrease the global warming effect not only on hair care industry but on any other human activity. Many people is trying to avoid using chemicals in their hair care regimes. Instead, they are using natural herbs and oils extracted from organic plants that is planted under observation to avoid pollution. Because of this hard effort to produce such substances, they are sold in high prices, not every one could be able to use those organic products. Also going to hair saloons became unadvisable from many environmental scientists, they are not environment friendly, which cause many to abandon those saloons and of course causing financial lost to many of those hair care branches. Maybe some hair saloons will only specialize in organic and natural products and because of the high prices of their products, only rich people will keep going to them. Bali Climate Change Conference (â€Å"Al Gore Finds New cause â€Å") declared that haircuts may raise green house gases amount. Maybe in the future, every body is going bald to avoid environmental crisis or even worse, we may be not able to even wash our hair, just like Cate Blanchett (Elsworth) is doing now. Climate is treating our hair badly, let’s all go baldy. Works Cited â€Å"Global Warming. â€Å"The Columbia Encyclopedia. 6th,New York. 2004. Clapp, Jennifer, and Peter Dauvergne. Paths to a Green World:The Political Economy of the Global Environment. Cambridge, Massachusetts: The MIT Press, 2005. Surviving the Century:Facing Climate Chaos and Other Global Challenges. Ed. Herbert Girardet. London: Earthscan, 2007. Speth, James. Red Sky at Morning: America and the Crisis of the Global Environment. USA: Yale University Press, 2004.

Ability to learn is affected by the classroom environment

â€Å" The physical environment of a schoolroom explains a batch about the outlooks of a instructor towards their pupils † ( Konza, Grainger A ; Bradshaw, 2001 ) . Before a pupil begins larning efficaciously they must be provided with a safe, positive and supportive learning civilization. In return will cut down struggle and enhance acquisition capablenesss. A pupil ‘s instruction is affected by the undermentioned constructs of the schoolroom environment: pick of coloring material, type of lighting, noise degree, room temperature, category size and ornament. A classrooms pick of coloring material impacts extremely on pupils larning. Certain colorss used on the walls of the schoolroom create both good and bad tempers ; impacting pupil larning. Mood is a pertinent facet of larning within a schoolroom. A pupil who is in a good temper and environment by others in a good temper will seek to larn and take in more from their lessons. Where as a pupil who is in a bad temper and surrounded by others in a bad temper will be loath to larn and seek distraction. Konza, Grainger A ; Bradshaw ‘s, ( 2001 ) research proves the colors orange, yellow, green, and light blue used in schoolrooms create a cheerful, sociable environment with minimum ill will and annoyance. In return allow for pupils to increase the consumption of information and apprehension for larning. Opposed to the dull, white, brown and black colorss used in a schoolroom that creates a non- stimulating nor productive environment. Hence colour itself is a critical portion in promotin g comfy and effectual acquisition. Consequently the pick of coloring material when utilizing in a schoolroom puting demands to be addressed as it impacts extremely on a pupil ‘s temper and in return affects their learning abilities. Sound is another construct that impacts on a pupil larning. On a day-to-day footing the schoolroom encounters many sums and different types of noise and can run from: schoolroom treatments, background noise, conversations and music. Nevertheless Marsh ( 2008 ) states that â€Å" sounds are all around us, nevertheless when sounds are unwanted they are redeemed as noise † . In order to larn pupils are subjected to conversations throughout their twenty-four hours, if non by the instructor, but themselves and other equals. The degree of variable noise will change depending on scenes such as the difference between libraries to art categories. Every schoolroom has background noise such as fans, airing, treatments and conversations which is step in dBs as BNL ( Background noise degrees ) . Marsh ( 2008 ) . A instructor can pass on clearly in a quiet voice when the BNL rises to 35dB, supplying a safe and comfy ambiance. A normal voice will transport good over a BNL of 40dB where larni ng takes its extremum as information and instructions can be delivered and heard clearly. Opposed to anything over 45dB or 50 dubnium where a instructor or pupil must talk really aloud which in return can do distraction, annoyance, emphasis and weariness ( Marsh, 2008 ) . Due to the fortunes of being subjected to a assortment of different degrees of noise within a schoolroom, pupils can change between efficient acquisition and aside. This clearly outlines the importance of noise degree in the schoolroom and its effects on instruction. There is much research grounds based on the effects of category size that is redeemed to be contradictory, whether it impacts on pupils accomplishments or non. However there are many survey ‘s that do place the significance of category size and its impact on pupil larning. Such as, Larkin, ( 2004 ) who states â€Å" that by cut downing category size, particularly for the younger kids, will hold a positive consequence on pupil accomplishment † . In making so will construct better instructor pupil relationships which will break their attitude towards larning and better their instruction. The province authorities had taken action to cut down category sizes for illustration New South Wales had aimed to hold category sizes changing from 20 to 24 pupils in the first three old ages of schooling for all province schools by 2007.Marsh ( 2008 ) . The pupils within these schoolrooms will hold the chance to derive more of the instructor ‘s clip, attending and instruction. Leti ng for more one- on- one instruction to take topographic point in the schoolroom and clip and attending for inquiries and replies that will heighten pupil cognition and better their instruction. Rather than, the pupils being subjected to big category size where the instructor struggles to run into the demands of all his or her pupils. In return go forthing the pupils troubled, unconfident and discerning towards their instructor, schooling and in peculiar instruction itself. Based on the synthesis of Course, Minus, A ; Passing. ( 2008 ) that little categories in the early classs generate better environments for pupils and these are greater the longer the pupils are exposed to the smaller categories. Due to the consequence of pupil accomplishment displayed in the authorities ‘s actions to make smaller category sizes, it is now more of precedence within schools to move on the information and work towards smaller categories as it is turn outing to be successful. Based on authorit ies consequences and theoreticians, the success of the passage to smaller categories is sketching the significance category size has on pupil acquisition. When measuring the schoolroom environment, temperature is a critical construct as it can impact pupil ‘s behavior and in return their ability to take on cognition. Marsh ( 2008 ) states that â€Å" Common sense would bespeak that there is a reasonably limited temperature scope in which school pupils might be expected to work at their best † . She explains that high temperatures can do some pupils to be cranky and uncomfortable and in utmost instances both unenrgetic and nauseating. Equally good as cold temperatures that may convey out aggression and negative behavior in some pupils within the schoolroom. The temperature of a schoolroom can be altered through the usage and execution of osculating ceiling fans, oil and gas fired warmers and air-conditioning. Marsh ( 2008 ) . It is the duty of the instructor to be cognizant of the possibilities of temperature emphasis if excessively high or low temperatures prevail and adjust their activities consequently. Temperature is a critical facet on the schoolroom environment. It can change how a pupil feels and in return their attitude to school and instruction. Therefore temperature has considerable impact on a pupil ‘s ability to larn comfortably and expeditiously. A pupil ‘s ability to larn is extremely affected by the constructs of the schoolroom environment. Students go to school to be educated and this instruction can be manipulated by many factors that exist within the schoolroom. Therefore changeless alteration and appraisal of schoolrooms is needed to guarantee that there is an addition of sufficient and effectual acquisition taking topographic point without distraction and hurt. By researching and admiting that the schoolroom environment has many constructs to it such as pick of coloring material, degree of noise, category size and temperature that all impact on how a pupil learns and their ability to larn. The school and instructors can work together to make a comfy acquisition environment to accommodate the acquisition demands of pupils. Ability to learn is affected by the classroom environment â€Å" The physical environment of a schoolroom explains a batch about the outlooks of a instructor towards their pupils † ( Konza, Grainger A ; Bradshaw, 2001 ) . Before a pupil begins larning efficaciously they must be provided with a safe, positive and supportive learning civilization. In return will cut down struggle and enhance acquisition capablenesss. A pupil ‘s instruction is affected by the undermentioned constructs of the schoolroom environment: pick of coloring material, type of lighting, noise degree, room temperature, category size and ornament. A classrooms pick of coloring material impacts extremely on pupils larning. Certain colorss used on the walls of the schoolroom create both good and bad tempers ; impacting pupil larning. Mood is a pertinent facet of larning within a schoolroom. A pupil who is in a good temper and environment by others in a good temper will seek to larn and take in more from their lessons. Where as a pupil who is in a bad temper and surrounded by others in a bad temper will be loath to larn and seek distraction. Konza, Grainger A ; Bradshaw ‘s, ( 2001 ) research proves the colors orange, yellow, green, and light blue used in schoolrooms create a cheerful, sociable environment with minimum ill will and annoyance. In return allow for pupils to increase the consumption of information and apprehension for larning. Opposed to the dull, white, brown and black colorss used in a schoolroom that creates a non- stimulating nor productive environment. Hence colour itself is a critical portion in promotin g comfy and effectual acquisition. Consequently the pick of coloring material when utilizing in a schoolroom puting demands to be addressed as it impacts extremely on a pupil ‘s temper and in return affects their learning abilities. Sound is another construct that impacts on a pupil larning. On a day-to-day footing the schoolroom encounters many sums and different types of noise and can run from: schoolroom treatments, background noise, conversations and music. Nevertheless Marsh ( 2008 ) states that â€Å" sounds are all around us, nevertheless when sounds are unwanted they are redeemed as noise † . In order to larn pupils are subjected to conversations throughout their twenty-four hours, if non by the instructor, but themselves and other equals. The degree of variable noise will change depending on scenes such as the difference between libraries to art categories. Every schoolroom has background noise such as fans, airing, treatments and conversations which is step in dBs as BNL ( Background noise degrees ) . Marsh ( 2008 ) . A instructor can pass on clearly in a quiet voice when the BNL rises to 35dB, supplying a safe and comfy ambiance. A normal voice will transport good over a BNL of 40dB where larni ng takes its extremum as information and instructions can be delivered and heard clearly. Opposed to anything over 45dB or 50 dubnium where a instructor or pupil must talk really aloud which in return can do distraction, annoyance, emphasis and weariness ( Marsh, 2008 ) . Due to the fortunes of being subjected to a assortment of different degrees of noise within a schoolroom, pupils can change between efficient acquisition and aside. This clearly outlines the importance of noise degree in the schoolroom and its effects on instruction. There is much research grounds based on the effects of category size that is redeemed to be contradictory, whether it impacts on pupils accomplishments or non. However there are many survey ‘s that do place the significance of category size and its impact on pupil larning. Such as, Larkin, ( 2004 ) who states â€Å" that by cut downing category size, particularly for the younger kids, will hold a positive consequence on pupil accomplishment † . In making so will construct better instructor pupil relationships which will break their attitude towards larning and better their instruction. The province authorities had taken action to cut down category sizes for illustration New South Wales had aimed to hold category sizes changing from 20 to 24 pupils in the first three old ages of schooling for all province schools by 2007.Marsh ( 2008 ) . The pupils within these schoolrooms will hold the chance to derive more of the instructor ‘s clip, attending and instruction. Leti ng for more one- on- one instruction to take topographic point in the schoolroom and clip and attending for inquiries and replies that will heighten pupil cognition and better their instruction. Rather than, the pupils being subjected to big category size where the instructor struggles to run into the demands of all his or her pupils. In return go forthing the pupils troubled, unconfident and discerning towards their instructor, schooling and in peculiar instruction itself. Based on the synthesis of Course, Minus, A ; Passing. ( 2008 ) that little categories in the early classs generate better environments for pupils and these are greater the longer the pupils are exposed to the smaller categories. Due to the consequence of pupil accomplishment displayed in the authorities ‘s actions to make smaller category sizes, it is now more of precedence within schools to move on the information and work towards smaller categories as it is turn outing to be successful. Based on authorit ies consequences and theoreticians, the success of the passage to smaller categories is sketching the significance category size has on pupil acquisition. When measuring the schoolroom environment, temperature is a critical construct as it can impact pupil ‘s behavior and in return their ability to take on cognition. Marsh ( 2008 ) states that â€Å" Common sense would bespeak that there is a reasonably limited temperature scope in which school pupils might be expected to work at their best † . She explains that high temperatures can do some pupils to be cranky and uncomfortable and in utmost instances both unenrgetic and nauseating. Equally good as cold temperatures that may convey out aggression and negative behavior in some pupils within the schoolroom. The temperature of a schoolroom can be altered through the usage and execution of osculating ceiling fans, oil and gas fired warmers and air-conditioning. Marsh ( 2008 ) . It is the duty of the instructor to be cognizant of the possibilities of temperature emphasis if excessively high or low temperatures prevail and adjust their activities consequently. Temperature is a critical facet on the schoolroom environment. It can change how a pupil feels and in return their attitude to school and instruction. Therefore temperature has considerable impact on a pupil ‘s ability to larn comfortably and expeditiously. A pupil ‘s ability to larn is extremely affected by the constructs of the schoolroom environment. Students go to school to be educated and this instruction can be manipulated by many factors that exist within the schoolroom. Therefore changeless alteration and appraisal of schoolrooms is needed to guarantee that there is an addition of sufficient and effectual acquisition taking topographic point without distraction and hurt. By researching and admiting that the schoolroom environment has many constructs to it such as pick of coloring material, degree of noise, category size and temperature that all impact on how a pupil learns and their ability to larn. The school and instructors can work together to make a comfy acquisition environment to accommodate the acquisition demands of pupils.

Child abuse and neglect Essay Example | Topics and Well Written Essays - 250 words

Child abuse and neglect - Essay Example Child abuse can occur at every cultural line and socioeconomic level (Clark 58). Some of the pivotal reasons for the occurrence of child abuse are lack of resources, stress of caring children, marital conflict, deficiency of maturity and isolation from family. Neglect is the form of child abuse which refers to as the failure of parents to provide child. It can also be considered as the failure of caretakers to provide the fundamental needs of a child. Neglect of a child may include concerns of medical care, education, housing, clothing and adequate amount of food. Lack of nurture, love and adequate supply of necessities for the survival of child are experienced by neglected children. The essential role of child protection service is to investigate the report of child abuse and neglect and assess the risk of harm on child.The goal of CPS is to promote the well-being and safety of children by providing safe

The Regional Transportation District in Denver Essay - 1

The Regional Transportation District in Denver - Essay Example Through research and analysis, it has been shown that the project is feasible and the only thing needed to be done is the making of a dream into reality. Probably, the strength seen in this proposal is the consideration of its weaknesses so that preparations could be made for a positive response to problems that may arise. Foreseeing what could happen in the administration of the project makes one be prepared to face not only those which are expected but to anticipate things that have never been brought to mind during the course of planning. It is true that there could be other problems to be met in the future in the process of realizing the dream of a quality-based parking space and one could not know what to prepare for in such case but having an attitude of preparedness can evade unsolved problems. As all ideas have their strengths and weaknesses, it is also true in this thought of making a parking space to solve the current problems in Denver RTD. Not disregarding the weaknesses but considering them to make the plan even better, the team who will be working on this is encouraged to unite in the realization of a traffic free and parking space problem free community without even going against the law nor putting the burden on the citizenry. This author believes that everyone would love to live in a world where there is less stress in the streets and in the workplace and this proposal is not just a solution to the most evident problem on the parking spaces but also extends help to make our days go well in school and at work. It is then concluded that the proposition is not only feasible but also very helpful in the society, affecting many aspects of our lives, making the expenses and trouble we will all go through in realizing our desire. It is then my desire to encourage the actions of those who are in the position to approve review all the information presented in this paper and with the same passion as this author has, may you all become one in mind to exte nd the best that you can to have a Denver that can take pride in its Regional Transportation District.

Decision Making Coursework Example | Topics and Well Written Essays - 250 words

Decision Making - Coursework Example The verdict bears positives for the individuals in the institution as well as the organization. However, the prioritization of profit with disregard of the customer well-being leads the firm into crisis. Specifically, it amounts to the organization breaching the laws governing ethical practices and thus may face legal action (Fitzgerald, 2002). For this reason, the company needs to make haste and strategic decisions with high-risk consequences. Nonetheless, the company may compensate the victims to avoid legal battles. More so, individuals in the company should look into ways that improve the product. Therefore, it is important that the leader change the decision-making approach that gives the managers the autogamy of making decisions in the enterprise. Considering Werbach’s criticism of Wal-Mart, it is unexpected that he would join the company. However, he realizes that he can influence change while working from within the system. Although the public view this as a bad decision, Werbach can change the employees’ lifestyle as they start embracing sustainable practices. Therefore, it is a successful decision considering the positive outcome. A successful decision is measured by how well it shapes the growth of the business. In addition, the benefit-cost ratio is applicable as an indicator of assessing the effectiveness of a decision of the company (Fitzgerald,

Financial Statement Analysis and Report Essay Example | Topics and Well Written Essays - 1500 words

Financial Statement Analysis and Report - Essay Example Although the sales of Grand Company increased from BD7450 in year 5 to BD10660, there was a subsequent increase in the purchases and cost of sales leading to a fall in the gross profit margin. The operating profit margin also fell from 10% in year 5 to 5% in year 6. Grand Company earned a better gross profit of BD3500 in year 6 as compared to the gross profit of BD2915 in year 5. However, this was not sufficient in improving the operating margin of Grand Company as expenses increased drastically from year 5 to year 6. This drastic increase was due to the addition of interest expense on the bank loan taken by Grand Company to inject more funds into the business. Return on capital employed is a measure of assessing how much return a company is generating on the capital that is employed in the business. Grand Company took a bank loan in year 6 and hence had more capital as compared to year 5. However, the additional capital was not used efficiently and this is why the return on capital fell drastically from 12% in year 5 to 6% in year 6. Overall, the profitability of Grand Company deteriorated from the year 5 to the year 6. Grand Company should take measures to increase their revenue and reduce their costs in order to stay profitable and sustain their existence in the business. The liquidity of Grand Company remained stable from the year 5 to year 6. There was not much fluctuation in the current and acid test ratio. The efficiency of Grand Company improved in year 6. The cash conversion cycle improved indicating that Grand Company’s ability to earn cash improved in year 6. Grand Company took a bank loan to inject liquidity into the business which lead to the interest coverage ratio in the year 6. The EPS of Grand Company fell drastically from year 5 to year 6 due to the fall in the net income in year 6. Users of Financial Statements: Objective of Financial Statements is to produce information that is as useful as possible for many different types of users o f financial statements. Users of financial statements include: Investors: a potential investor uses the financial statements to find out if the investment is suitable or not in the prospective company. Analysts: An analyst uses the financial statements and recommends. Shareholders: Shareholders Regulatory authorities: Tax authorities may use financial statements of company to find out if the taxes are calculated in an appropriate manner. Financial institutions: banks and other lending companies assess the financial statements of a company before giving out loans to assess whether the company will be able to honor its obligations Trade Creditors: Trade creditors and vendors who supply goods on credit also use financial statements to assess the ability of a company to repay its short term debts. Owners and managers: they use the financial decision to make important strategic decisions that help the company to grow and