Why ants would pause if met / met with other ants?. Ants that look "pitted head" when meeting it is actually being communicated. T.C. Schneirla, a researcher at New York University, had conducted experiments with ants. He took an ant and then put in place of food. Another ant put in place that contains enemy ants. Then the second ant behavior is observed especially when met with his friends on the street.
From that research, Schneirla concluded that chemicals released from food or from enemy ants ants stick to it. When meeting with his ants, the ants would greet each other (touching). Well, here's to greet each of the chemicals the ants will tell her (via antenna on the head ant) whether there is food in the surrounding environment or enemy.
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Minggu, 29 Juni 2014
SOHC VS DOHC
Differences DOHC VS SOHC
DOHC stands for Double Overhead Camshaft (as an alternative to the SOHC engine type). Layout engine uses two back (camshaft as) on top of the engine block. It also means that the engines are DOHC V 4 camshafts because there are two blocks that make it easier for the machine manufacturer implements 4 valves per cylinder. Most also brings propeller DOHC engine (RPM) is higher.
Better layout optimizes valve setup that maximizes engine performance as well. But its shortcomings, the weight will increase, more expensive, and more complicated. Also more parts to play two back.
The main reason to use a DOHC valve to add more on each cylinder. (But) if SOHC allows the use of 4 valves per cylinder (as in MX or Thundy 250), the DOHC is no longer everything. Especially with a heavier weight.
In short, SOHC 16 valve has better torque at low rpm because it is lighter (rotating machine) and vice versa DOHC engine produces more torque due to the weight lower. But in at high speed, 16 valve DOHC engine torque will be better. That's the trade-offs. When the spigot amount equal, SOHC has better low-end torque while DOHC has better top-end power is higher.
Another advantage, easier to apply tenologi DOHC variable valve timing (VVT) and ditune-up easier. If you intend to use a back-profile racing on the DOHC, lobe profiles can be optimized for easier fiddling add modifiers in a separate state.
Why need more valve? Why you do not make each one suction valve and discard it? Of course not. Larger valve would be heavier and would be very difficult to control at high engine speed. Per valve must be rigid, which means also the extra energy needed to withstand the pressure (motion) valve. Useless, is not it!
Also at low engine propeller, the large valve suction velocity becomes lower. Simply this: the power of pressure on a hole that big is definitely smaller than the holes smaller. Because the suction velocity decreases, low torque and engine movement also weakened.
Although two smaller valve would weigh 1 large valve, and with the addition of the trigger valve (rocker arm) and by which means a little heavier, but all that means nothing compared to decreasing the burden on the process of opening and closing the valve. So, more valves per cylinder is more profitable?
Let's compare a Nissan VG30E versus VG30DE. Both 3.000cc with electronic fuel injection, but that the 2 valve SOHC and DOHC 4 valve latter per cylinder. Consider the diagrams below. Look at the same RPM at low speed, but 2 valves per cylinder has reached its peak and had to change gears, while the twincam 4 valve per cylinder continues to add energy at its peak powerband. Powerband (power distribution) is also longer. But remember, this graph to determine the different 2-valve and 4-valves, not to compare the SOHC vs DOHC.
Show SOHC
In conclusion, SOHC has better torque down lap, while the opposite DOHC (peak power and energy distribution of the maximum length of time). 4 valves per cylinder better than 2 valves per cylinder, 4 valves either the SOHC or DOHC dipanceng on.
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DOHC stands for Double Overhead Camshaft (as an alternative to the SOHC engine type). Layout engine uses two back (camshaft as) on top of the engine block. It also means that the engines are DOHC V 4 camshafts because there are two blocks that make it easier for the machine manufacturer implements 4 valves per cylinder. Most also brings propeller DOHC engine (RPM) is higher.
Better layout optimizes valve setup that maximizes engine performance as well. But its shortcomings, the weight will increase, more expensive, and more complicated. Also more parts to play two back.
The main reason to use a DOHC valve to add more on each cylinder. (But) if SOHC allows the use of 4 valves per cylinder (as in MX or Thundy 250), the DOHC is no longer everything. Especially with a heavier weight.
In short, SOHC 16 valve has better torque at low rpm because it is lighter (rotating machine) and vice versa DOHC engine produces more torque due to the weight lower. But in at high speed, 16 valve DOHC engine torque will be better. That's the trade-offs. When the spigot amount equal, SOHC has better low-end torque while DOHC has better top-end power is higher.
Another advantage, easier to apply tenologi DOHC variable valve timing (VVT) and ditune-up easier. If you intend to use a back-profile racing on the DOHC, lobe profiles can be optimized for easier fiddling add modifiers in a separate state.
Why need more valve? Why you do not make each one suction valve and discard it? Of course not. Larger valve would be heavier and would be very difficult to control at high engine speed. Per valve must be rigid, which means also the extra energy needed to withstand the pressure (motion) valve. Useless, is not it!
Also at low engine propeller, the large valve suction velocity becomes lower. Simply this: the power of pressure on a hole that big is definitely smaller than the holes smaller. Because the suction velocity decreases, low torque and engine movement also weakened.
Although two smaller valve would weigh 1 large valve, and with the addition of the trigger valve (rocker arm) and by which means a little heavier, but all that means nothing compared to decreasing the burden on the process of opening and closing the valve. So, more valves per cylinder is more profitable?
Let's compare a Nissan VG30E versus VG30DE. Both 3.000cc with electronic fuel injection, but that the 2 valve SOHC and DOHC 4 valve latter per cylinder. Consider the diagrams below. Look at the same RPM at low speed, but 2 valves per cylinder has reached its peak and had to change gears, while the twincam 4 valve per cylinder continues to add energy at its peak powerband. Powerband (power distribution) is also longer. But remember, this graph to determine the different 2-valve and 4-valves, not to compare the SOHC vs DOHC.
Show SOHC
In conclusion, SOHC has better torque down lap, while the opposite DOHC (peak power and energy distribution of the maximum length of time). 4 valves per cylinder better than 2 valves per cylinder, 4 valves either the SOHC or DOHC dipanceng on.
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PC Game I ever Play
1. Skyrim
The Elder Scrolls V: Skyrim (often simply referred to as Skyrim) is a role-playing video game developed by Bethesda Game Studios and published by Bethesda Softworks. It is the fifth installment in The Elder Scrolls action role-playing video game series, following The Elder Scrolls IV: Oblivion. It is scheduled to be released on November 11, 2011 for Microsoft Windows, PlayStation 3 and Xbox 360.
Skyrim's main story revolves around the player character's efforts to defeat the nordic dragon god Alduin who is prophesied to destroy the world. Set two hundred years after Oblivion, the game takes place in the land of Skyrim in the midst of a civil war after the assassination of the high king. The open world gameplay of the Elder Scrolls series is continued in Skyrim, as the player character can explore the land at will and ignore or postpone the main quest indefinitely.
The Elder Scrolls V: Skyrim (often simply referred to as Skyrim) is a role-playing video game developed by Bethesda Game Studios and published by Bethesda Softworks. It is the fifth installment in The Elder Scrolls action role-playing video game series, following The Elder Scrolls IV: Oblivion. It is scheduled to be released on November 11, 2011 for Microsoft Windows, PlayStation 3 and Xbox 360.
Skyrim's main story revolves around the player character's efforts to defeat the nordic dragon god Alduin who is prophesied to destroy the world. Set two hundred years after Oblivion, the game takes place in the land of Skyrim in the midst of a civil war after the assassination of the high king. The open world gameplay of the Elder Scrolls series is continued in Skyrim, as the player character can explore the land at will and ignore or postpone the main quest indefinitely.
Benefits of Noni Fruit For Health
Here are some benefits of the Noni Fruit Contained in this.
Noni fruit can play an important role for the immune Increase or what we call the immune system because it contains substances in noni buag natural anitoksidan.
Noni fruit can prevent the spread of cancer cells that are harmful to the body.
Noni can prevent tumor disease
Can be used as a herbal medicine to cure the disease cough, fever, and abdominal pain or mules.
As a fruit that serves to Herbal Medicines pain reliever.
Can normalize blood pressure in our body
Noni fruit can play an important role for the immune Increase or what we call the immune system because it contains substances in noni buag natural anitoksidan.
Noni fruit can prevent the spread of cancer cells that are harmful to the body.
Noni can prevent tumor disease
Can be used as a herbal medicine to cure the disease cough, fever, and abdominal pain or mules.
As a fruit that serves to Herbal Medicines pain reliever.
Can normalize blood pressure in our body
Game Console I Have Played Until Now
1. SNES
The Super Nintendo Entertainment System (also known as the
Super NES, SNES[b] or Super Nintendo) is a 16-bit video game console developed
by Nintendo that was released in 1990 in Japan, 1991 in North America, 1992 in
Europe and Australasia(Oceania), and South America in 1993. In Japan, the
system is called the Super Famicom (スーパーファミコン Sūpā Famikon?, officially
adopting the abbreviated name of its predecessor, the Family Computer), or SFC
for short. In South Korea, it is known as theSuper Comboy (슈퍼 컴보이) and was distributed by Hyundai
Electronics. Although each version is essentially the same, several forms of
regional lockout prevent the different versions from being compatible with one
another.
The Super Nintendo Entertainment System is Nintendo's second
home console, following the Nintendo Entertainment System (NES). The console
introduced advanced graphics and sound capabilities compared with other
consoles at the time. Additionally, development of a variety of enhancement
chips (which were integrated on game circuit boards) helped to keep it
competitive in the marketplace. While crude three-dimensional graphics had
rarely been seen before on home consoles,[11] utilizing the Super FX chip
beginning with Star Fox in 1993,[12] the SNES was able to run games with
smoother and more detailed three-dimensional graphics than was previously
possible. This sparked more widespread interest in polygon graphics in the
industry, helping to usher in 3D graphics as seen in the fifth generation of
video game consoles.[13]
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