Friday, February 27, 2015


1370 B.C The Bible mention already the MECHANICAL RESONANCE OF SOUND:When Trumpets Sounded and the army shouted loud The City Wall of Jericho was collapsed.

When the trumpets sounded, the army shouted, and at the sound of the trumpet, when the men gave a loud shout, the wall collapsed; so everyone charged straight in, and they took the city.(Joshua 6:20)

This article is about mechanical resonance in physics and engineering. For a general description of resonance, see resonance. For mechanical resonance of sound including musical instruments, see acoustic resonance. For the music album by American rock band Tesla, see Mechanical Resonance.

Graph showing mechanical resonance in a mechanical oscillatory system

Mechanical resonance is the tendency of a mechanical system to respond at greater amplitude when the frequency of its oscillations matches the system's natural frequency of vibration (its resonance frequency or resonant frequency) than it does at other frequencies. It may cause violent swaying motions and even catastrophic failure in improperly constructed structures including bridges, buildings and airplanes—a phenomenon known as resonance disaster.

Avoiding resonance disasters is a major concern in every building, tower and bridge construction project. The Taipei 101 building relies on a 660-ton pendulum — a tuned mass damper — to modify the response at resonance. Furthermore, the structure is designed to resonate at a frequency which does not typically occur. Buildings in seismic zones are often constructed to take into account the oscillating frequencies of expected ground motion. In addition, engineers designing objects having engines must ensure that the mechanical resonant frequencies of the component parts do not match driving vibrational frequencies of the motors or other strongly oscillating parts.

Many resonant objects have more than one resonance frequency. It will vibrate easily at those frequencies, and less so at other frequencies. Many clocks keep time by mechanical resonance in a balance wheel, pendulum, or quartz crystal.

The 1940 Tacoma Narrows Bridge, the first Tacoma Narrows Bridge, was a suspension bridge in the U.S. state of Washingtonthat spanned the Tacoma Narrows strait of Puget Sound between Tacoma and the Kitsap Peninsula. It opened to traffic on July 1, 1940, and dramatically collapsed into Puget Sound on November 7 of the same year. At the time of its construction (and its destruction), the bridge was the third longest suspension bridge in the world in terms of main span length, behind the Golden Gate Bridge and the George Washington Bridge.

Construction on the bridge began in September 1938. From the time the deck was built, it began to move vertically in windy conditions, which led to construction workers giving the bridge the nickname Galloping Gertie. The motion was observed even when the bridge opened to the public. Several measures aimed at stopping the motion were ineffective, and the bridge's main span finally collapsed under 40-mile-per-hour (64 km/h) wind conditions the morning of November 7, 1940.

Following the collapse, the United States' involvement in World War II delayed plans to replace the bridge. The portions of the bridge still standing after the collapse, including the towers and cables, were dismantled and sold as scrap metal. Nearly 10 years after the bridge collapsed, a new Tacoma Narrows Bridge opened in the same location, using the original bridge's tower pedestals and cable anchorages. The portion of the bridge that fell into the water now serves as an artificial reef.

The bridge's collapse had a lasting effect on science and engineering. In many physics textbooks, the event is presented as an example of elementary forced resonance, with the wind providing an external periodic frequency that matched the bridge's natural structural frequency, though the actual cause of failure was aeroelastic flutter. Its failure also boosted research in the field of bridge aerodynamics-aeroelastics, the study of which has influenced the designs of all the world's great long-span bridges built since 1940.


Advance Science of the Bible

 935 B.C the Bible  mention the Coriolis Effect of Wind 

The wind goeth toward the south, and turneth about unto the north; it whirleth about continually, and the wind returneth again according to his circuits. (Ecclesiastes 1:6)

In the Northern Hemisphere, this deflection causes the wind flow around high pressure systems to go clockwise while flow around low-pressure systems travels counterclockwise. Imagine a low-pressure system as a vacuum that sucks all the surrounding air straight towards it, creating many vectors of wind that all focus on one spot. Because of the Coriolis effect, each of these vectors gets twisted to the right, which in turn creates a counterclockwise flow. With a high-pressure system, air gets forced outward and the Earth's eastward spin creates a clockwise flow. In the Southern Hemisphere, the opposite takes place: Wind around low-pressure systems circles clockwise while wind around high-pressure systems circles counterclockwise.

The swirling motions around low-pressure systems are actually the driving forces behind hurricanes. The air gets sucked in with such force and spins to such a degree that a potentially destructive storm develops. Warm ocean water fuels the system and if it gets a chance to grow over a period of time, powerful winds of more than 62 miles per hour (100 kilometers per hour) can form a storm strong enough to destroy anything in its path -- all just from the spin of our little planet.

The curvature of the winds created by the Coriolis effect also helps create surface ocean currents. The wind drags on the water's surface, creating spiral currents called gyres. As you may have guessed, the gyres in the Northern Hemisphere spin clockwise and the ones in the Southern Hemisphere spin counterclockwise.

Meteorologists and sailors aren't the only ones who have to contend with the Coriolis effect. Since aircraft cover large distances in a short period of time, pilots must also take its influence into account when charting the paths for their flights. For instance, a plane headed from Miami (where the Earth's rotation is more pronounced) to New York would end up in the Atlantic Ocean if the pilot ignored the effects of the Earth's rotation.

Saturday, February 21, 2015



With him is an arm of flesh; but with us is the LORD our God to help us, and to fight our battles. And the people rested themselves upon the words of Hezekiah king of Judah. (2Chronicles 32:8)

Thus saith the LORD; Cursed be the man that trusteth in man, and maketh flesh his arm, and whose heart departeth from the LORD.(Jeremiah 17:5)

"I, even I, am he who comforts you. Who are you that you fear mere mortals, human beings who are but grass,(Isaiah 51:12)

The Holy Right Hand is housed in the St. Stephen Basilica in Budapest and once a year, on August 20, it is carried in the Holy Right Hand ( Szent Jobb) procession.

The Basilica’s website tells a straightforward story that accepts without qualification that the mummified right hand once belonged to King Stephen, the first Hungarian king (1000-1038).

Here is their story in a nutshell. Stephen was buried in Székesfehérvár on August 15, 1038, in a sarcophagus that is more or less intact although empty. The body was later reburied in the lower underground catacomb out of fear of possible disturbances of the grave. It was at that time that the hand was removed from the rest of the body because of its alleged miraculous properties. It was taken to the treasury of the basilica from where the man who was in charge of guarding the treasury stole it and hid it on his estate in the County of Bihar/Bihor, today Romania.
St stpehen's sarcophagus
During the reign of King László I the Right Hand was discovered, but the king forgave the thief and in fact erected a monastery on the spot. The village today is called Szentjobb/Siniob. It was here that pilgrims came to pray in front of the king’s Right Hand, which was allegedly capable of performing miracles.

It was only in the fifteenth century that the Right Hand was moved from Szentjobb/Siniob back to Székesfehérvár. During the Turkish occupation, however, around 1590, it ended up in Ragusa (Dubrovnik) and was held by Dominican friars. The official church story doesn’t divulge any details of its mysterious reappearance in Ragusa. As for the rest of the Hand’s history, I outlined it yesterday–that is, the purchase of the Right Hand by Queen Maria Theresa and her gift of it to her Hungarian subjects.

Today I would like tell the story that the Catholic Church ignored.

There are two chronicles that mention the burial and subsequent reburial of the body. Both report that the Right Hand was removed to the County of Bihor where it was found by King László on May 30, 1084. According to the chronicler Hartvik, bishop of Győr (1116), at that time the Hand had St. Stephen’s ring on it which definitely identified it as belonging to the saintly king. The alleged Right Hand today has no ring on it or any sign that there ever was a ring it that was later removed.

There is another problem. All contemporary pictures show Stephen buried lying on his back, his hands alongside his body with open fists. Today’s Right Hand, as you can see on the picture, is tight-fisted. But that is not all. The official coat-of-arms of the town of Szentjobb/Siniob shows not just the hand but the whole arm bent at the elbow. Since the town came into being as a result of the presence of the Holy Right Hand, one must assume that the coat-of-arms is an accurate depiction of the actual state of the relic at the time.

And with that missing arm we come to Stephen’s body parts wandering around in central Europe and the Balkans. It is assumed that the upper arm was removed in 1370 when Louis the Great (Nagy Lajos) also became the King of Poland. It was customary to send important relics as symbols of steadfast friendship and devotion to men, country, or cause. The Franciscans of the city of Lviv (Lvov, Lemberg) hold that at one time they were the ones who were entrusted with guarding the holy relic of St. Stephen’s upper arm for which King Jan Kazimierz II ordered a jeweled case.

The lower arm was sent by King Sigismund (Zsigmond) to Albert V at the time of his daughter’s marriage to the Prince (1411), sealing a personal union between Hungary and the Holy Roman Empire. For a while it was held in the St. Stephen Basilica in Vienna, named after St. Stephen the Martyr, and later was moved to the Schatzkammer of the Hofburg. But there is a bit of a problem with this lower arm. When the bone was sent to Hungary for the millennial celebrations in 2000 and was put on display, it was discovered that it is not part of an arm. Rather, it is the fibula of a right leg.

In addition, there are several small pieces of Stephen’s skull cap (calvarium) that are held in various places, including Székesfehérvár. No one has ever tried to find out whether these pieces of Stephen’s skeleton belong to the same man or not. Since the 1950s the Right Hand was examined three times but not scientifically. The first time the Right Hand seemed to have developed mildew which needed to be removed. The physician who attended to it added some conserving material to the rest of the hand and that was all. In 1988 another physician examined it, but the only thing he came up with was that there was no sign of metal ever touching the hand because otherwise there should have been some observable discoloration. He also noticed that it was a relatively small hand. The third time it was Miklós Réthelyi, professor of anatomy and later minister in the second Orbán government, who took a look at it, but he came up with nothing new. A DNA examination would only make sense if we could find a descendant of Stephen, but even if that were possible I doubt that either the Hungarian Catholic Church or the current Hungarian government would be too keen on such a scientific investigation.

As for the multiplication of St. Stephen relics. As late as 2004, a piece of Stephen’s upper arm that ended up in Poland was given by Franciszek Cardinal Macharski, Archbishop of Cracow, to the Hungarian chapel of the Divine Mercy Sanctuary in Cracow. In 2009 Balázs Bábel, Archbishop of Kalocsa, gave a golden reliquary to Robert Bezák, Archbishop of Nagyszombat/Trnava, in which there is a very small bone of the Right Hand. In the same year a small piece of St. Stephen’s skull was sent to a church in the Subcarpathian part of Ukraine. In 2006, Cardinal Péter Erdő, the head of the Hungarian Catholic Church, gave a piece from St. Stephen’s rib to Alojz Tkáč.

What can we say state with certainty about the Holy Right Hand? “It is sure that it is the hand of a man,” to quote the title of a piece in

Thursday, February 19, 2015


Animal Color Change

The Principles of Animals Coloration mention in the Bible

And Jacob took him rods of green poplar, and of the hazel and chestnut tree; and pilled white strakes in them, and made the white appear which was in the rods.And he set the rods which he had pilled before the flocks in the gutters in the watering troughs when the flocks came to drink, that they should conceive when they came to drink. And the flocks conceived before the rods, and brought forth cattle ringstraked, speckled, and spotted. And Jacob did separate the lambs, and set the faces of the flocks toward the ringstraked, and all the brown in the flock ofLaban; and he put his own flocks by themselves, and put them not unto Laban's cattle. And it came to pass, whensoever the stronger cattle did conceive, that Jacob laid the rods before the eyes of the cattle in the gutters, that they might conceive among the rods. (Genesis 30:37-41)

Icelandic sheep come in a variety of colors. The sheep on the left carries at least one "black" allele on the color gene, two "solid" alleles on the pattern gene, and two "spotting" alleles on the spotting gene. The sheep on the right has at least one "white" allele on the pattern gene, which conceals any other colors and patterns it may have.

(S) The Spotting Gene. All Icelandic sheep inherit 1 gene for each factor from each parent, receiving 6 in total.

In the last section, we saw that the most basic form of camouflage is a coloration that matches an animal's surroundings. Of course, an animal's surroundings may change from time to time. Many animals have developed special adaptations that let them change their coloration as their surroundings change.

One of the biggest shifts in an animal's surroundings occurs with the changing of the seasons. In the spring and summer, a mammal's habitat might be full of greens and browns, while in the fall and winter, everything can be covered with snow. While brown coloration is perfect for a summer wooded environment, it makes an animal an easy target against a white background. Many birds and mammals deal with this by producing different colors of fur or feathers depending on the time of year. In most cases, either changing amounts of daylight or shifts in temperature trigger a hormonal reaction in the animal that causes it to produce different biochromes.
As the seasons change, the Arctic fox changes the color of its coat. In the spring and summer, it has a dark coat, to match the brown dirt in its environment. In the fall and winter, it turns white, to match the surrounding

Animal coloration is the general appearance of an animal resulting from the reflection or emission of light from its surfaces. Some animals are brightly coloured, while others are hard to see. In some species, such as the peacock, the male has strong patterns, conspicuous colours and is iridescent, while the female is far less visible.

There are several separate reasons why animals have evolved colours. Camouflage enables an animal to remain hidden from view. Signalling enables an animal to communicate information such as warning of its ability to defend itself (aposematism). Animals also use colour in advertising, signalling services such as cleaning to animals of other species; to signal sexual status to other members of the same species; and in mimicry, taking advantage of another species' warning coloration. Some animals use colour to divert attacks by startle (deimatic behaviour), surprising a predator e.g. with eyespots or other flashes of colour, and possibly by motion dazzle, confusing a predator's attack by moving a bold pattern (such as zebra stripes) rapidly. Some animals are coloured for physical protection, such as having pigments in the skin to protect against sunburn, while some frogs can lighten or darken their skin for temperature regulation. Finally, animals can be coloured incidentally. For example, blood is red because the haem pigment needed to carry oxygen is red. Animals coloured in these ways can have striking natural patterns.

Animals produce colour in different ways. Pigments are particles of coloured material. Chromatophores are cells containing pigment, which can change their size to make their colour more or less visible. Some animals, including many butterflies and birds, have microscopic structures in scales, bristles or feathers which give them brilliant iridescent colours. Other animals including squid and some deep-sea fish can produce light, sometimes of different colours. Animals often use two or more of these mechanisms together to produce the colours and effects they need.

One of the pioneers of research into animal coloration, Edward Bagnall Poulton classified the forms of protective coloration, in a way which is still helpful. He described: protective resemblance; aggressive resemblance; adventitious protection; and variable protective resemblance.These are covered in turn below.
A camouflaged orange oak leaf butterfly, Kallima inachus (centre) displays protective resemblance

Protective resemblance is used by prey to avoid predation. It includes special protective resemblance, now called mimesis, where the whole animal looks like some other object, for example when a caterpillar resembles a twig or a bird dropping. In general protective resemblance, now called crypsis, the animal's texture blends with the background, for example when a moth's colour and pattern blend in with tree bark.
A flower mantis, Hymenopus coronatus, displays special aggressive resemblance

Aggressive resemblance is used by predators or parasites. In special aggressive resemblance, the animal looks like something else, luring the prey or host to approach, for example when a flower mantis resembles a particular kind of flower, such as an orchid. In general aggressive resemblance, the predator or parasite blends in with the background, for example when a leopardis hard to see in long grass.

For adventitious protection, an animal uses materials such as twigs, sand, or pieces of shell to conceal its outline, for example when a caddis fly larva builds a decorated case, or when adecorator crab decorates its back with seaweed, sponges and stones.

In variable protective resemblance,an animal such as a chameleon, flatfish, squid or octopus changes its skin pattern and colour using special chromatophore cells to resemble whatever background it is currently resting on (as well as for signalling).

The main mechanisms to create the resemblances described by Poulton – whether in nature or in military applications – are crypsis, blending into the background so as to become hard to see (this covers both special and general resemblance); disruptive patterning, using colour and pattern to break up the animal's outline, which relates mainly to general resemblance; mimesis, resembling other objects of no special interest to the observer, which relates to special resemblance; countershading, using graded colour to create the illusion of flatness, which relates mainly to general resemblance; and counterillumination, producing light to match the background, notably in some species of squid.

Countershading was first described by the American artist Abbott Handerson Thayer, a pioneer in the theory of animal coloration. Thayer observed that whereas a painter takes a flat canvas and uses coloured paint to create the illusion of solidity by painting in shadows, animals such as deer are often darkest on their backs, becoming lighter towards the belly, creating (as zoologist Hugh Cott observed) the illusion of flatness,and against a matching background, of invisibility. Thayer's observation "Animals are painted by Nature, darkest on those parts which tend to be most lighted by the sky's light, and vice versa" is called Thayer's Law.

Wednesday, February 11, 2015


Then God said, “Let the waters swarm with fish and other life. Let the skies be filled with birds of every kind.” So God created great sea creatures and every living thing that scurries and swarms in the water, and every sort of bird—each producing offspring of the same kind. And God saw that it was good. Then God blessed them, saying, “Be fruitful and multiply. Let the fish fill the seas, and let the birds multiply on the earth.”(Genesis 1:20-22)

Earth was able to support life only after the planet had cooled enough for a rocky crust to solidify. Once that happened, water vapor from volcanoes condensed in the atmosphere, fell as rain, and collected on the Earth’s surface. Besides water vapor, volcanoes also produced gases rich in the basic ingredients of life: carbon, hydrogen, oxygen, and nitrogen. Toxic gases such as ammonia and methane were common. At this point, Earth's early atmosphere consisted entirely of these volcanic gases, and there was no free oxygen. In the primordial “soup” of the early seas, organic molecules concentrated, formed more complex molecules, and became simple cells.

The transition from complex organic molecules to living cells could have occurred in several environments. Small, warm ponds are one possibility, but recent work has suggested that deep-sea hydrothermal vents, such as those found along mid-ocean spreading centers today, may have been the cradle of Earth's life. These environments contain the chemicals and the source of energy needed to synthesize more complex organic structures. Although scientists have not succeeded in creating life from organic molecules in the laboratory, they have reproduced many of the intermediate steps.

So what were the first living things and when did they appear? Studies of genetic material indicate that a living group of single-celled organisms called Archaea may share many features with early life on Earth. Many Archaea now live in hot springs, deep-sea vents, saline water, and other harsh environments. If the first organisms resembled modern Archaea, they also may have lived in such places, but direct evidence for early life is controversial because it is difficult to distinguish between complex inorganic structures and simple biological ones in the geologic record. The oldest evidence for life may be 3.5-billion-year-old sedimentary structures from Australia that resemble stromatolites. Stromatolites are created today by living mats of microorganisms (mostly cyanobacteria, or blue-green algae). These primitive organisms trap thin layers of sediment with their sticky filaments and grow upward to get light for photosynthesis. Modern-day examples of stromatolites can be found in waters off Australia, the Bahamas, and Belize.

In the Archean structures, layers similar to those seen in living stromatolites are evident, and secondary structures interpreted as simple filamentous microfossils have been recovered from the layers. The biotic origin of the structures has, however, been questioned. Both the supposed Archean stromatolites and the microfossils may have been produced by inorganic processes. Regardless, uncontested microfossils and chemical traces of life were present at least by 2.7 billion years ago. Stromatolites that were produced by microorganisms are abundant later in the Archean and throughout the Proterozoic. These sedimentary structures, formed by organic processes, provide important evidence of early life. At present, we can say with certainty that life had evolved by 2.7 billion years ago, and possibly as early as 3.5 billion years ago.