Currently, there are different concepts and terminology that are not always understandable.
What are the triggers?
In general, this concept can be viewed in various fields. It is found in science: medicine, psychology, computer science, computing systems, and even in economics. Each definition means completely different things that are not related. The most common terminology have computer systems.
- 1 Triggers in medicine and psychology
- 2 Triggers in computer science
- 3 Triggers in the economy
- 4 Triggers on the site
- 5 Computational Systems and Triggers
Triggers in medicine and psychology
As a medical term, he is an asthma factor. Triggers of allergy is the usual dust, which is often formed on the surface of home furniture. Allergy symptoms can also be bird feathers, wool and plant pollen. Allergies are not always triggers, they can be caused by:
- Virus infection;
- Harmful substances;
- Hormonal functions of the body;
- Emotional moods of a person
In psychology, they are human reactions. This is a special process, which is the phenomena of the world, and the person, in turn, perceives it. Mechanical actions that are able to do such a process are called triggers.
Human reactions to the mechanisms are completely different, so they can be harmful to health. Such harm as smoking, overeating, poisoning with narcotic drugs and alcohol products. People under the influence of such reactions can not control their body, their brains automatically turn off and do not perceive the outside world. Mechanical reactions can have a positive effect on the human body, such as emotions: joy, happiness, love, etc.
Triggers in computer science
They are an important part in RAM computer, as well as its internal registers. Such information devices allow storing, storing and reading important information. Triggers in computer science are electronic circuitswhich are used in the registers at the computer and remember the binary code. Binary code is two stable states of 0 and 1.
Triggers in the economy
Today, the economy has a huge impact on human life. The concept of "trigger" plays the role of a management function in marketing, i.e. it forces to perform any action. The main goal for the management function is to attract customers, performance of tasks. This factor helps to make large deals, find new buyers for the goods and make similar things in the future.
A powerful tool that gives a response among buyers - advertising. With its help, the consumer learns much about the product, its quality. Manufacturers who advertise their product, usually have a good profit. The main thing is to make a beautiful design of advertising, to describe everything, as it should, and the tricks will work. The demand for goods will grow, and consequently, the trading business will move in the right direction. All this goes into the hands of individual entrepreneurs, because they know exactly what their job is.
Triggers on the site
They represent various functionsthat can attract visitors to the site, help to do useful for the site owner spins the portal. People such triggers encourage you to buy products from the site or order services. Due to this, the owner of the organization receives a good profit. A simple view for a trigger is a portfolio. This includes the company's brand, usually its logo. All awards, diplomas and certificates also form trust among consumers of companies' products. The positive reviews that are posted on the sites are the same triggers as the warranty. Warranties are a sign that the consumer will have the right to return money for the goods or their exchange.
Computational Systems and Triggers
In computing systems, they represent electronic device classwhich can be in two stable states and alternate them when exposed to any signals. The condition can be determined using the output voltages of the devices. Usually they work as a pulse device and the change of state occurs in the shortest possible time. A distinctive feature for such devices is the memorization of binary information, the coding of which is often used by programmers in their work.
Memory refers to two stable states as 1 and 0. Thus, the unit may mean that the signal is received, and zero, in turn, on the contrary, plays the opposite role. Triggers in computing systems are made of semiconductor devices, such as: transistors, bipolar or field. Their schemes are created in the integrated environment for various logical elements of the device. Depending on the presentation of the output information, distinguish the following triggers: dynamic and static.
Dynamic are those that represent controlled generators, one state equal to 1, and the second equal to 0. Their change occurs with the help of internal impulses. The value “1” is the presence of a pulse of certain frequencies, and the value “0” is the absence of a pulse.
Static devices are those that characterize each state by constant output voltage levels. High levels are usually close to the supply voltage, and low levels are close to zero. Also, static triggers are called potential, which can be divided into two types: symmetric and asymmetrical. They were implemented using a two-stage two inverter amplifier with positive feedback.
Difference between symmetric triggers and non-symmetric triggers in that they are formed symmetrically in their structure, the parameters of the elements will also be symmetrical. They form the basis of the triggers that are used today in electronic devices. Unbalanced devices have non-identical parameters and connections between them.
A common feature of the functionality for symmetric and asymmetrical triggers is systematizing them by the way they are organized. On this basis, a classification of logical elements is made, the number of inputs and outputs is calculated.
There are different types of triggers:
RS are those trigger devices that can be presented in two versions: synchronized and asynchronized. Asynchronous can change their state, depending on the moment of appearance of the corresponding signal, with a certain delay. Synchronous can respond to informational signals, if there is a corresponding signal at the output of synchronization.
D - this is a synchronous device with a delay. They are such a device that remembers the state of the input and gives it to the output. Usually they have two inputs: synchronous and informational. Information in such devices is stored only when the synchronization pulses fall. Typically, devices of this type are called latch triggers. Their name sounds like this, because they literally remember the information and leave it unchanged until the very exit.
T-flip-flops are asynchronous and synchronous devices that resemble a counter. Asynchronous counters do not have an input that enables the counting, they can only switch on a pulse at the input. Synchronous counters, with the value "1" at the input T, are able to change their logical state to the opposite, already at the input C. The output state will not change when the value "0" at the input T. Such triggers are used to reduce frequency waves.
JK Triggers - These are devices that operate on the principle of RS-triggers, but they have one difference. It consists in the fact that when the logic element is fed to the unit, both inputs will change opposite ones. Input J is almost as good as input S of RS devices, and K will be the other way around, similar to input R. Usually, synchronous JK devices are used in the application, their states are taken into account only at the time of the pulse cycle. The base of such devices allows you to build D and T-triggers.