Category Archive Learn

What to know about optical sensors

July 29, 2021 Comments Off on What to know about optical sensors By admin

The number of optical sensors on our phones and laptops has been rising steadily over the past decade, and the size of their sensors has also increased.

While the technology to process, interpret and analyze optical data has been evolving, optical instruments have remained largely the same.

There have been improvements in some aspects of the technology, but the fundamentals remain the same, as is the way the data is handled and processed.

What is an optical sensor?

There are two main types of optical instruments: Optical sensors are a type of optical device that can capture images, and they can perform optical signals analysis.

Optical sensors include: An infrared light sensor, for example, a light sensor that emits infrared light; A photodetector, a device that absorbs light from light sources such as the sun, or infrared cameras that capture infrared light.

A digital camera, for instance, can capture a digital image or video of the object.

The digital sensor takes the image, or video, and combines the data to create a digital representation of the image.

This is known as an image or digital camera.

In some applications, such as a computer, a digital camera also takes a digital copy of the data that it is capturing, to help it analyse and store it.

A number of types of digital sensors can be used to analyse images and video.

The most common optical sensors are infrared cameras, which capture infrared radiation.

An infrared camera can be made up of two parts: an infrared light detector and a photodeter.

An optical sensor uses the infrared light that is emitted by the photodette to detect an object.

An object is detected when an infrared photon is reflected off the photodiode.

The reflected photon is converted to an infrared image, which can then be analyzed.

Optical optical instruments include optical densitometers, which measure the amount of infrared radiation in an object by measuring the absorption and reflection of infrared light, and optical sensors, which are commonly called digital cameras.

Optical density measurements are used to compare different optical optical sensors to each other and can tell which optical sensor is better.

The optical sensor’s absorption and reflectance, or photon count, determine the resolution and signal processing capability of the optical signal analysis.

For example, the optical density of a light source can tell you how bright the light source is.

When an optical signal analyzer is used, the information it provides is stored in memory.

The memory of the instrument is a digital storage medium that can be read and written by computers.

Optical sensor technology has evolved over time to take advantage of advances in computer technology and the increasing sophistication of digital imaging, for which there is a need for a new optical sensor.

Optical digital cameras have a relatively small sensor size and are generally designed for low-light situations.

For high-light applications, the sensor can have a larger sensor, such a 12-micron-thick layer, which is typically used in digital cameras with large lenses.

In addition, there are some optical sensors that use a more complicated, higher-resolution optical signal processing technology.

These include the optical optical fibre sensors used in many digital cameras, such the optical fibre camera, optical fibre imaging sensors and optical fibre detector, or ODF.

Optical fibre cameras are a kind of digital image sensor, which stores digital images in the form of images.

The information stored in the digital images can be analyzed in real-time and processed by computers to create high-resolution images.

Optical imaging sensors are generally used in a number of applications, including digital cameras and high-definition video cameras.

These sensors also have a wide variety of uses, from providing information to a camera for shooting images, to storing the image data for use in image processing applications.

Optical image sensors have also become more powerful in recent years, with optical fibre and optical sensor technology combining to provide higher resolution and greater resolution than the previous generation of optical imaging sensors.

Optical signal processing is an area where optical digital cameras stand out.

For a digital imaging sensor to be capable of high resolution and high signal processing, the image processing and data storage needs to be performed using the optical image processing algorithm, or an algorithm that is designed to perform this processing in real time.

Optical signals are information that a signal processing algorithm has to process.

This information includes information about how the signal is received and processed, as well as information about the signal itself.

Optical processing includes both digital signal processing and analog signal processing.

The analog signal processor is the digital signal processor that is responsible for performing the analog signal, and in the analog system, the signal processing can be done using an analog or digital processor.

Analog signal processing includes processing of an analog signal in a computer.

An analog signal is data that can have the properties of both a digital and a digital signal, depending on the particular processing algorithm used to process it.

Analog signals are usually used to generate signals for an audio system.

Analog video signals can be converted to

, , , ,

When does a doctor start to practice the art of surgery? CricInfo

July 25, 2021 Comments Off on When does a doctor start to practice the art of surgery? CricInfo By admin

This article is the third in a three-part series on the history of surgery.

Part one, “History of Surgery,” explains how the term “surgery” came to be and explains how physicians were called to practice medicine.

Part two, “The Beginning of the Profession,” looks at how physicians got their medical training and how the medical profession has evolved.

Part three, “In the Shadow of the Medicine,” explores the ways doctors are today and how they have come to see the world differently than physicians of yore.

, , , ,

Infinity Optical Instruments unveils new optical instrument for high-resolution imaging

July 23, 2021 Comments Off on Infinity Optical Instruments unveils new optical instrument for high-resolution imaging By admin

The Infinity Optical Systems, Inc. announced Wednesday that it has unveiled a new instrument that it claims will revolutionize the field of optical imaging.

The instrument, called Infinity Optical Imaging, has a resolution of 1,000 pixels per inch.

It is the largest and highest resolution optical imaging system currently in use in the United States.

Infinity will be used to provide “a single-shot, continuous high-quality optical imaging experience, as opposed to a series of successive image-capture shots,” Infinity said in a statement.

Infinity plans to sell the device for $9,999, and it expects to begin commercial shipments in 2019.

It will be built on an eight-core ARM Cortex-A9 processor, Infinity said.

The company’s first commercial device, called a High Definition Optic Imaging (HDOI) camera, is expected to be ready for commercial use in 2019, Infinity CEO David Smith said.

The HDOI camera, which uses a laser to create a 3-D image of a subject, will allow users to capture “high-quality images and videos with a single shot,” Infinity’s Smith said in the statement.

, , ,

Ottawa police officer accused of killing man on train

July 23, 2021 Comments Off on Ottawa police officer accused of killing man on train By admin

Ottawa police have charged an officer with second-degree murder in the fatal shooting of a man who was allegedly attempting to rob the station car at the Ottawa-Carleton train station on July 18.

Sgt. Chris Bousquet has been charged with second degree murder and six counts of attempted murder.

The charges relate to the death of 26-year-old Kevin McEachern.

Police say McEaghern was trying to rob a car at Ottawa-Gatineau station, which has a ticketing booth.

On July 19, police responded to a call about a man running from the station and was confronted by McEaknesers’ car.

The man then allegedly assaulted a police officer.

Police said the officer then fired his gun.

The car sustained damage and a police dog was killed during the altercation.

Ottawa police said a suspect in the attempted murder of McEaqhern, who was shot multiple times, was taken into custody on July 19.

The Ottawa Citizen reported that McEagan was shot by a plainclothes police officer after the officers pursuit.

Bousquets lawyer, Robert McLeod, said McEanchen had no criminal history and had been an Ottawa police service officer for more than 20 years.

“The charges allege that Sgt. McEearls actions were justified,” McLeod said in a statement to the Citizen.

“Sgt. Mcearls reputation was damaged and he had a bad experience with the police department.”

McEaynesers lawyer, Michael Broussard, told the Citizen that the officer is remorseful and understands the seriousness of the charge.

He said he has been in contact with McEawes family and friends.

The investigation is ongoing and McEowans family will be made aware of any developments as they are made available.

McOlea says charges should not be read as an exoneration of the police officer, who is accused of shooting McEanhans car on July.

McLeod told the newspaper that McLeod “absolutely does not” believe the officer has a case against him, and said the allegations should be read in the context of the investigation.

McEarls trial continues with an emotional hearing on Monday.

His lawyers are expected to make submissions to the trial’s defence team on Tuesday.

How to find out if your lenses are worth $10-$20K

July 18, 2021 Comments Off on How to find out if your lenses are worth $10-$20K By admin

With the rise of smartphones and tablets, we’ve witnessed a massive shift in the way we use our vision, and it’s not just the amount of data we’re seeing and using.

As a result, we have to be more vigilant about finding the best lens for your eyes.

While most people probably know that lenses are usually the best way to achieve a good picture, it can be tricky to tell the difference between the best quality lenses and the cheapest, or the best ones that offer the best image quality at a low price.

There are many reasons why lenses aren’t always the best option for a given task, and the same goes for other types of equipment.

With that in mind, we’ll be looking at some of the best and most popular lens options, including how to determine which lens will actually work best for your specific use-case.

We’ll also be looking into the pros and cons of lens brands, as well as some other factors to consider when shopping for a new lens.

What is the best optical lens?

The most important thing to consider is whether you’ll actually need a particular lens for that task.

With digital cameras, lenses typically cost about a third of what they used to, so a cheap $1 lens can be more than enough to get the job done.

With cameras that are still capable of shooting stills, however, a larger lens might not be enough.

Even though most lenses have a built-in mirror, you might have to take the time to get used to them, so it’s important to consider the mirror size and type of lens you have before deciding on which one to buy.

Lens manufacturers have a wide range of options, from inexpensive models to premium models.

If you’re unsure of which type of camera lens you’ll need, we recommend taking a look at our guide to deciding whether or not to go with a lens.

The best lens to use in the digital age A few years ago, we saw the rise in the popularity of digital cameras.

With the advent of newer models and the availability of inexpensive cameras, people were eager to get a lens that was built-into their camera, and that was the best of the lot.

That meant the price of a new, expensive lens was starting to drop.

It was also the case that newer cameras offered more performance, with the latest models offering better image quality and lower image noise.

But as the market has matured and newer models have become more powerful, the prices of newer lenses have dropped as well.

The biggest trend in lenses since the early 2000s is the decline in the price.

Most people are used to paying about $1,000 for a decent, low-priced lens, but if you can afford it, you can get one for a fraction of that price.

For example, a Canon EF 85mm f/1.4 USM lens can cost you about $2,000.

That’s only about a fifth of what a similarly sized, older Canon EF 100mm f1.8 USM is, which is about $3,500.

As the popularity and price of new lenses have waned, there has been a sharp rise in people’s preference for cheaper, cheaper alternatives.

So it’s no surprise that the prices for many of the newer lenses are also dropping, especially in the low end.

This has led to a large gap between the prices that people can afford and the prices they can get.

This trend is expected to continue, as more and more people are upgrading their cameras to the latest, most powerful models.

Lens quality and image quality can be very subjective.

Some lenses, especially those from Canon, offer the very best quality of the bunch, but others might be too expensive or not built-to-tilt for some people.

If your eyes are naturally suited to a certain style of picture, then it’s possible to get more bang for your buck by choosing a lens for a certain purpose.

For instance, the EF-S 18-135mm f-2.8 IS USM Lens is a good choice for people who want a long-lasting and very sharp image.

It’s also a great choice for photographers who want the best possible image quality, as it is not only lightweight but also doesn’t require you to buy a separate camera body.

This lens is also known as the “E-mount” lens.

For those who don’t know, an E-mount lens is a lens with a fixed focus that can be attached to a camera body, such as a DSLR.

In this case, it’s a lens designed to be attached directly to the camera body rather than to a tripod.

That means the lens will not rotate around the camera, but will remain in the same position on the camera.

For the lens to work well, it must be designed with an element that can rotate freely, and this element is usually the E-MOS.

That is, the lens has to be designed to accept the lens adapter on the

How to make optical images from your phone

July 17, 2021 Comments Off on How to make optical images from your phone By admin

A new type of optical instrument called a “micro-optical” can see small objects with incredible clarity from a few hundred meters away, researchers said.

The optical device can take pictures that are as good as taking pictures with a camera, and the photos are taken with a tiny camera in your pocket.

Researchers at Stanford University have used the micro-optic lens to create images of insects in a lab.

They also created 3D images of water on a pond, which was made with a 3D printer. 

The images show the microscopic insect insects moving in different directions and can be used to create 3D models of the insects in their natural environment.

They were created by a team of researchers at Stanford, the University of California, Berkeley and the University

, , ,

Man accused of stealing cameras from office building says he doesn’t remember anything

July 12, 2021 Comments Off on Man accused of stealing cameras from office building says he doesn’t remember anything By admin

A suspect is accused of breaking into an office building in northern Alabama and stealing camera equipment, authorities said.

The alleged burglary happened at the Alabama-North Carolina Industrial Development Center, located at 632 W. Piedmont Ave., in Fayetteville.

It was not immediately known if the suspect had an attorney.

Investigators said the suspect was seen entering the building and breaking into several offices before fleeing on foot.

He was last seen wearing a dark jacket and a blue shirt.

He is described as white, about 5 feet 9 inches tall and weighing about 180 pounds.

Anyone with information about the alleged burglary can call the Fayette County Sheriff’s Office at 910-547-7200 or Crime Stoppers at 1-800-SPEAK-UP.

A little bit of space on the inside of the Mars Rover’s nose

July 6, 2021 Comments Off on A little bit of space on the inside of the Mars Rover’s nose By admin

Posted November 15, 2019 04:32:24As the Mars rovers mission continues, NASA’s Curiosity and Opportunity teams are also preparing for the next step.

The rover’s mission director, Marc Rayman, has been on the job since August, when the rover landed on Mars.

NASA’s rover team is making sure that all the components are in place for the spacecraft to land safely.

They have a big plan for the craft to land on Mars that they will share at a meeting in October.

They will begin to build the vehicle as it begins to land, then begin the final testing before it lands on the surface of Mars.

The final step of the plan is to have the vehicle take off and then land on the Martian surface.

The final part of the plans are to send the craft back to Earth, so it can send back images of the landing site.

NASA has also been working on sending the craft’s instruments back to the laboratory to make sure the rover can communicate with them.

That process is also going to happen at the end of the mission.NASA will be spending hundreds of millions of dollars to send two of its Curiosity rover teams back to Mars.

One of the teams, called “Mars Science Laboratory” (MSL), will land on an outcrop of sand called “Wadi Rijala,” or “Wedge of Rijal,” on Mars’ Red Planet.

The other rover, called Mars Odyssey, will land a bit further from Wadi Rjaal.

The MSL and Odyssey teams will be working together on the mission that includes sending a small piece of lander science instrument called a “satellite.”

It will be the only spacecraft that will have a lander on Mars and then take the lander down to the surface.

The lander is equipped with instruments that will be able to look for signs of water, minerals, and other life on Mars, and can even pick up radio signals from other landers that have landed there.

MSL has a very small crew and will not be able use its instruments to get up close to the ground on Mars without a lot of extra equipment, so that will not work well.NASA has sent two of the rover teams, MSL, to Mars, so this mission is part of their mission plan.

The spacecraft will be sent to Mars on October 15, 2020.NASA is working with the European Space Agency and Russia’s Roscosmos to get the landers ready for the final test.

The test will last about two weeks, so the landering mission will not happen until after the rover team has landed on the planet.

The landers will be tested with different types of instruments.

One type of instrument will test the chemistry of the Martian atmosphere.

The second instrument will examine the Martian crust.

This will be done with instruments called “methane and water” instruments.

A sample will also be sent into space to make certain the samples are clean enough to study them.

This would also be done by the landER lander, which is about the size of a shoebox.

The sample will be about a foot in diameter, which means it will take about two days to carry all the data that will enable scientists to see what the rover did on the Mars surface.

There are several more details that NASA will share about the test before the rover lands on Mars on November 15.

NASA also wants to know how the landings are going.

So far, the landing has been very successful, but NASA has not been able to land successfully on the Red Planet itself.

NASA will be using the landESAT instrument on Mars to learn more about the atmosphere of Mars and the conditions on Mars at the time that the landesers are landing.

Follow Elizabeth Howell @howellspace, or @Spacedotcom.

We’re also on Facebook and Google+.

‘Curious’ optical shop items could be used for medical research

June 18, 2021 Comments Off on ‘Curious’ optical shop items could be used for medical research By admin

A doctor is searching for an object in the world that would allow doctors to measure blood flow to specific organs, such as the heart, lungs, liver and brain.

The idea of such an instrument has been around for some time, but there is still a long way to go to develop a device that could be a reality, said Dr. Joseph Faderman, who works as an optometrist in New York.

He told ABC News that he believes the idea could be possible because the world has changed so much over the past 20 years.

“When I was a kid, you could go to the grocery store, and it would be the same thing.

There would be a whole lot of things that were the same, and you could pick out all of them, and they would all be the exact same,” he said.”

So you could see that when you go to a grocery store today, it is different from 20 years ago.

I don’t think that that is something we can predict.”

Dr. Fadman believes the heart might be an ideal candidate for an optical instrument because it is known to be more responsive to light.

Optical heart valves are located in the heart and allow doctors and other health care workers to measure how much blood flow is being lost or pumped out of a specific area of the body.

If a patient is at risk of developing a heart attack, it could be crucial information about how the heart is responding to that condition.

“We need to know, what is the heart doing?

How is it working?

What is its function?

How are the arteries being protected?” he said, adding that he has a particular interest in the immune system, which may have the ability to detect abnormal blood flow.”

There are certain types of blood that you would want to see in the eye, like a red blood cell or white blood cell,” he explained.

“What are those?

You would want a marker that could show up in that area of your body.”

The technology to test blood flow in a patient could be very different from that used in surgery.

“When you’re doing surgery, the surgeon doesn’t look at the patient’s eyes.

They see an image and then the surgeon moves to a different part of the patient,” he told ABC.

“The technology is a lot different.”

Dr Fademan said there are several reasons why an optical heart valve could be an attractive candidate for a medical study.

First, he said that it would make a great optical sensor for a heart monitor, allowing doctors to see what the patient is doing and whether they are being active or passive.

“The problem is that it is not a lot of work to put it on a heart.

You just need to mount it on the chest,” he noted.”

If you are going to put something on the head, you have to put some kind of a mirror on it.

And that’s not going to be a very good solution for the patient.”

Secondly, he believes that the heart may be able to tell when it is contracting or relaxing, as it would respond to changes in blood flow with a signal.

The sensor could also provide information about the heart’s own electrical activity.

Finally, the technology could be particularly useful for testing drugs and drugs may have adverse side effects, so it could help to track how the drug is affecting the body, Fadher added.

“These are all things that are not necessarily known yet,” he added.

In the meantime, there are many people who are interested in the idea of a device like this.

They include researchers, doctors, and patients who may want to try their hand at this type of research.

“It is exciting to see the future of optical heart valves.

These are exciting devices that could make a big difference in the way that we study the heart,” said Dr Daniel Oster, a professor of medicine at the University of Michigan Medical School and one of the few doctors who have used an optical device to examine patients.

Oster is not the only doctor to have used a optical device, though.

Researchers at the Brigham and Women’s Hospital in Boston, Massachusetts, and elsewhere have used them to measure cardiac rhythms, to monitor the heart during a heart transplant and to detect signs of chronic disease.

Oster said that the optical heart can also be used to measure the levels of blood vessels and other biological structures in the body and to help researchers to figure out the effects of drugs and other substances on a patient’s body.

The technology has also been used in clinical trials to evaluate a new type of blood thinner, which uses a different kind of optical valve to measure changes in the electrical activity of the blood vessels.

“This is a very exciting new device that is very different than anything that we have seen before,” Oster told ABCNews.

“This is the first time that a device has been used to monitor changes in electrical activity in the blood vessel.”


How to make a brain-like object with a lens

June 17, 2021 Comments Off on How to make a brain-like object with a lens By admin

The brain has been known for a long time to have a lens, but new research suggests that it might be the first organ to have one, says New Scientist.

The research is published in the journal Scientific Reports.

The team behind the study, led by University of Melbourne neuroscientist Andrew Stott, says that the lens is a type of synapse, which allows communication between neurons to occur.

The researchers say that the brain’s vision system is made up of about 30 types of synapses, which are the linkages between cells.

Each of these links are made up entirely of different proteins, and each of them has its own properties.

For example, the type of protein that is attached to the end of the link is called a ‘neuronal adhesion molecule’, which makes the connections between the neurons easier.

But this adhesion isn’t the only one that the team used to look at the neural network.

The brain also has a series of specialized proteins called neurotransmitters.

The most common neurotransmitter is acetylcholine, which is released when a neuron fires.

This makes it possible for the neurons to fire in synchrony, which makes them very useful for communication.

The other neurotransmitter in the brain is glutamate, which can cause electrical activity.

But unlike glutamate, glutamate isn’t produced by neurons, but by certain other proteins called neurites, which contain a receptor for the neurotransmitter.

The neurites in question are called synapses.

In addition to acetyl-choline and glutamate, the researchers also used a number of other proteins, called adhesion molecules and neurite-like proteins.

These are made of different types of proteins called polypeptides, which act like chemical sensors and send messages to the neurons.

These proteins are involved in coordinating the firing of the synapses and are also involved in forming the synaptic connections between cells and the brain.

The scientists found that, by contrast, the neurons don’t make any neurite proteins.

Instead, the synapse relies on proteins called adhesins, which stick to the surface of the neuron and act as electrical sensors.

The fact that these proteins aren’t synthesized in the cells suggests that the cells aren’t making any special proteins.

So how did these proteins come to be in the synaptosomes?

It’s possible that the researchers were able to create a synapse by using special proteins called ‘molecular machines’ to change the protein configuration.

These molecules were discovered by John Ioannidis, a researcher at the University of California at Berkeley, in 1964, and were originally designed to detect certain molecules called ‘polymers’ in chemicals.

These polymers can be made of two different substances called ‘sulfides’ and ‘nitrates’.

The scientists then modified the structure of these two molecules so that they could be used to create synapses between cells, which then made it possible to form neurons.

In the 1970s, Ioannides and his colleagues discovered that some of the molecules used in these machines could bind to certain proteins in certain cells, and this meant that they would be able to form a synaptome.

The discovery of these molecules in the 1980s, however, was a bit of a shock.

The molecule that they discovered could only bind to one protein in certain cell types, so the researchers thought that they might be able, perhaps, to ‘borrow’ the molecules and make them in a different way.

To test this idea, the team took these molecules and chemically synthesized them into different structures.

By doing this, they discovered that they weren’t actually made of molecules at all, but rather, a ‘solution’ of a single molecule, called an adhesin.

This molecule is attached with a protein called a dimer, which helps the molecules to stick to each other.

This dimer can be changed to produce other adhesines.

But in order to change adhesine properties, the molecule needs to have different properties.

This is what the team found.

The problem was that these dimers were attached to one of the protein-coding genes, called PEGAN1, which was present in the cell.

So the scientists thought that PEGAAN1 was responsible for making PEGANS, and therefore PEGANA1, and so on.

This led to the idea that, in fact, the proteins were the only way to make PEGGAAN1.

So, instead of using PEGGAN1 to make proteins that would bind to PEGGAN1, the scientists made PEGANN1, an adhesion-inducing molecule.

This was the key to the discovery.

This protein was then used to make more and more adhesions, which made it so that the scientists were able, in turn, to make neurons that can fire synchronously.

In this way, the neural networks of the brain, which consist of neurons, can form an image, called


Sponsored Content

한국 NO.1 온라인카지노 사이트 추천 - 최고카지노.바카라사이트,카지노사이트,우리카지노,메리트카지노,샌즈카지노,솔레어카지노,파라오카지노,예스카지노,코인카지노,007카지노,퍼스트카지노,더나인카지노,바마카지노,포유카지노 및 에비앙카지노은 최고카지노 에서 권장합니다.Best Online Casino » Play Online Blackjack, Free Slots, Roulette : Boe Casino.You can play the favorite 21 Casino,1xBet,7Bit Casino and Trada Casino for online casino game here, win real money! When you start playing with boecasino today, online casino games get trading and offers. Visit our website for more information and how to get different cash awards through our online casino platform.카지노사이트 추천 | 바카라사이트 순위 【우리카지노】 - 보너스룸 카지노.년국내 최고 카지노사이트,공식인증업체,먹튀검증,우리카지노,카지노사이트,바카라사이트,메리트카지노,더킹카지노,샌즈카지노,코인카지노,퍼스트카지노 등 007카지노 - 보너스룸 카지노.우리카지노 - 【바카라사이트】카지노사이트인포,메리트카지노,샌즈카지노.바카라사이트인포는,2020년 최고의 우리카지노만추천합니다.카지노 바카라 007카지노,솔카지노,퍼스트카지노,코인카지노등 안전놀이터 먹튀없이 즐길수 있는카지노사이트인포에서 가입구폰 오링쿠폰 다양이벤트 진행.카지노사이트 - NO.1 바카라 사이트 - [ 신규가입쿠폰 ] - 라이더카지노.우리카지노에서 안전 카지노사이트를 추천드립니다. 최고의 서비스와 함께 안전한 환경에서 게임을 즐기세요.메리트 카지노 더킹카지노 샌즈카지노 예스 카지노 코인카지노 퍼스트카지노 007카지노 파라오카지노등 온라인카지노의 부동의1위 우리계열카지노를 추천해드립니다.바카라 사이트【 우리카지노가입쿠폰 】- 슈터카지노.슈터카지노 에 오신 것을 환영합니다. 100% 안전 검증 온라인 카지노 사이트를 사용하는 것이좋습니다. 우리추천,메리트카지노(더킹카지노),파라오카지노,퍼스트카지노,코인카지노,샌즈카지노(예스카지노),바카라,포커,슬롯머신,블랙잭, 등 설명서.