Project Objectives Of Femtosecond Light Fields

The action of light is an extraordinary phenomenon. Light, for example, the one emitting from a light bulb, is a form of wave motions that consist of electric and magnetic fields that vibrate at right angles to the direction of travel of a light beam. The electric field that is associated with the light wave oscillates in random directions, but is always in a right angle to the light propagation direction. An unpolarized light is known as a light wave that vibrates

The documentary Visions of Light was made for the purpose of showing the art of cinematography. Cinematography was defined throughout the film as the making of a motion picture. “I found out that I was unconsciously responding to light.” said by Ernest Dickerson an American film director and cinematographer. Light is thought of to be something so little but means so much in a film. It is used to change the emotion and to tell people where to look.

On January 29, a Friday, I observed as five student workers ate their lunch around the UCI Athletics compound area. It was exactly 12:15 PM, when the student-workers marched into the area and grabbed their lunches. These are my co-workers, so I did not have to do much to blend in. However, I did want to act natural, so I drank from a bottle of water and sat in a chair in the corner of the compound. They were all eating at the same time, because they only had a short time until they had to get back to work. The first person I observed pulled his lunch out of an orange sack, in which he carried all of his items to work. He had a variety of items he brought to snack one. He moved over to one of the carts, and sat in

This research allows the chemist to look at the bonds of molecules changing by using lasers to excite the molecule then pulsing or probing a weaker laser to watch the molecule change. It can be changed by altering the weaker lasers probe and pulse options then watching the wavelength of the probe pulse to see if the change is happening. This research is happening at California Institute of Technology where Zewail is a

Although we cannot personally see it, polarized light is everywhere and the ability to capture it could be useful in numerous ways. The first question is then, how does the mantis shrimp do it? Similar to many other crustaceans, the mantis shrimp has light receptors in the optical units of their compound eyes that are sensitive to linearly polarized light. Nevertheless, it is a particular row of 6 units around the middle of their eyes known as the “midband” that makes them so unique. Inside these 6 rows are 3 different types of “rhabdoms” that attach to their receptors and occupy 2 rows each. These “rhabdoms” are specifically shaped to convert circularly polarized light into the much easier to process linear variety [5]. Inspired by this, researchers have made artificial “waveplates” that are “[comprised of] two layers of tantalum pentoxide nanorods structurally similar to those in the eye of the mantis shrimp [6]” and can alter polarized light in similar ways. They hope to someday be able to manipulate the polarization of light without changing the resulting colours and achieve results in “higher definition and larger storage density for optical media

In the last decades the management of patients with uveal melanoma has changed towards globe sparing techniques. Alternatives to the radical enucleation vary from observation to transpupillary thermotherapy, block-excision, and endoresection with pars plana vitrectomy, brachytherapy using a variety of radioisotopes, radiotherapy, Leksell Gama Knife and stereotactic radiosurgery (Henderson et al. 2006; Dieckmann et al. 2006; Mosci et al. 2009).

Images were observed through a Nikon 60x/0.95, Plan Apo objective, Corr Collar 0.11-0.23, CFI/60 Lambda with open aperture and 200 ms exposure at 488 nm excitation through the time series. During acquisition, laser focus was auto-adjusted so that high contrast images were

"Star Wars," "Star Trek," "Battlestar Galactica" are some of fiction movies that implement laser technology in it. LASER is an acronym for Light Amplification by Stimulated Emission of Radiation. Generally, it is a device that control the way for energized atom released their photon. As we go deep into the words of ‘LASER’, it actually generates an intense beam of coherent monochromatic light (or other electromagnetic radiation) by stimulated emission of photons from excited atoms or molecules. Laser light is totally different from the other light that exist in this Earth. There are few properties that make them up as a laser. First and foremost, it is monochromatic, which means the light released contain one specific wavelength of light due

If you’ve never been in a street fight, and boxing is too technical to follow, then before you sprint to your nearest dojo, consider that all the punches delivered in the history of humanity are to what a pulsar travelling at a good chunk of light speed just did to a disk of matter orbiting a giant star. Bruce Lee said to kick to the moon, but Chandra just captured this pulsar just punting the equivalent of a planet into interstellar space.

Electron communication is a lot like sending messages through today’s technology. When a neuron is stimulated, it sends an impulse from dendrites down its axon. The impulse is the same in that it fires at one strength and speed, the only difference is in the number of impulses sent. The impulse that is sent is what we call the action potential. A weak stimulus will trigger less frequent action potentials, while a intense stimulus will increase the frequency of action potentials. The neuron begins at a resting state with an inner voltage of -70mV and all of the ion channels closed. When a stimulus takes place the sodium channel will open and the charge inside the membrane with increase. The strength of the stimulus and change must break the threshold at -55mV. The actual movement of the impulse down the axon is what we call the conduction of the action

The development of the visual system is studied very widely in the world today for medical use and scientific challenge. It is important to analyse what infants can see and how they are developing for medical implications; to assess critical periods and as a chance to pick up on amblyopia. There are many ways of accurately testing infant’s colour vision such as preferential looking, VEPS and optokinetic nystagmus tests. Preferential looking uses the principle that infants fix on and follow objects. Two spatial frequency gratings are presented to the infant with varying contrasts. The infant will follow that grating with a higher contrast. A ‘blind’ observer will follow where the child fixates and record the results. Using this technique, you can detect what the infant can see. Visual Evoked Potentials is another method of measuring infants vision where a cap with 200 electrodes is fixed onto the infants’ head and the

There have been numerous things that I have learned and experienced during my short time within this course. The creation of a professional résumé, the philosophy of self-reelection as an upcoming teacher, even the field observation experience, it was all enlightening. However, if there was one definitive concept in this course that has had the most prominent effect on me and my potential as a teacher, it would have to be the discussions. To be able to state my end on intriguing topics and get a response, while also considering others’ opinions and points-of-views was fortuitous for me. The discussion board has persuaded me with topics that I would have not thought too much about until presented such as inner authority, fundamentals, and persuasion.

For our first field observation I went to YMCA in the Fremont/Newark on Tuesday July 14 around 4. I chose YMCA for my first field observation as it is very close to my house and also I always get newsletter from them so I know it is one of the best non-profit organization.

The laser was invented by Theodore H. Maiman on May 16, 1960 at Hughes research laboratory in California (Early History, 2). The laser, which stands for Light Amplification by Stimulated Emission of Radiation, has three main components: the pump, the laser medium, and the optical resonator. The pump sends energy into the laser

The exploration cruiser crew were wishing they weren’t in the white and orange and REALLY battered freighter known as The Exploration Cruiser. They were wishing about hanging out at planet D-X38, meeting their humanoid friends and drinking Coke at the diner. But no, NASA needed information about aliens (both hostile and docile) and planets beyond Voyager 1 and Voyager 2’s reach. It was very boring, and they had lots of unfortunate run-ins with the hostile Zarkians. Luckily, they escaped from most of them. Before long Zarkians started targeting the T.E.C. The captain suddenly said groggily, “What’s that? Is that mission control? No wait. . . . It’s something else!” The lieutenant said,” We’ve got to make contact with them! Okay, Special Exploration Squad, get into Pod