Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
HUNG THANH PHAN COVID-19 NEW SOLUTION
Document Type and Number:
WIPO Patent Application WO/2024/059891
Kind Code:
A1
Abstract:
HUNG THANH PHAN COVID-19 NEW SOLUTION is the new Machine for new prevention and new treatment of COVID-19 including all kind of virus causing COVID-19 Pandemic, Flue Pandemic, and small bacteria mix in the air. Many people around the world infected by COVID-19 more than 0.6 billion cases and more than 6.5 million people already died due to COVID-19 and about half million people died per year by Flue, in this new solution I introduce the new machine for new prevention and new treatment of COVID-19 virus or any kind of virus and small bacteria mix in the air. This machine for using at homes,, hospitals, schools, universities, shops, companies at work, age care, child care, crew ships, air planes, suitable for 7,96 billion people around the world to use.

Inventors:
PHAN HUNG (AU)
Application Number:
PCT/AU2022/051134
Publication Date:
March 28, 2024
Filing Date:
September 21, 2022
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
PHAN HUNG (AU)
International Classes:
F24F8/20
Foreign References:
CN112413804A2021-02-26
CN212566037U2021-02-19
CN112963929A2021-06-15
Download PDF:
Claims:
The Claim of the Machine: HUNG THANH PHAN COVID-19 NEW SOLUTION

(PREVENTION AND TREATMENT OF COVID- 19 VI RUS

Including any virus and small bacteria mix with the air).

This machine can be used io operate for ail rooms of indoor. Turn on the machine with instruction manual including 3 remote controls, using at homes, Hospitals, Schools, Universities, Shops, companies at work, age care, childcare, Crew Ships, Air Planes and activities indoor, the virus is very small and invisible by human eye but when you turn on the machine then any Virus mix up with the air will be died out or dis-functioning due to the genetic code of its RNA damage, Or DNA damage. Not only the Viruses but also for any small bacteria mix up with the dust in the air are also died out or dis functioning Therefore when it transfers to human body through the nose or the mouth, they cannot growth in the human body even though you haven't got a vaccine yet or have a weak of antibody. Since deep clean is not suitable every day at home, at shops or at work. But the fact is that virus diffuse in the air and the people breadth in above the surface of ground or any floor Level. This machine kills the viruses in the air.

The Structure of the Machine for COVID-19 NEW SOLUTION is containing at least five components (from a to e main parts and additional part f) as following: a) A frame structures

This frame of the machine allows air mixture circulate for the large volume of air passing through the machine in and out again and again. b) Energy source /heat to kill or dis Functioning Viruses or Bacteria:

Heat radiation from the top of machine to down wards to kill or dis functioning of t he Virus or Bacteria mix with the air around this part. c) Wind to push the air (Fan 1 outside the machine) moving the air mixture towards the machine entire enclosed space used by circulating the air movement for the room use. d) Temperature check for the entire area of operating use, especially for checking around and inside the machine

(Using a device to check temperature) e) Direction of air flow (Fan 2): This part drives the large amount of air movement from part (c) to pass inside the machine at this point, the direction of the mixture of the air change again toward the part b, at this point the Virus or bacteria mix with the air will be died out or dis functioning, and the air continue circulating. f) Support parts connection of all above with the power source

Illustration of parts of the Machine in Figure 1 a) The frame of the machine ABCDEFGH b) Energy source/heater. R1 is the receiver in this part to receive electromagnetic wave from

T1 (the transmitter from remote control). e) Fan2 (R4 in this Part is the Receiver corresponding to the electromagnetic wave from T4 the remote control) this part attaches to lower door (front door) of the machine, when the door is open, the Fan2 is the same the surface level of the plane QRST and the top doors also open allow the air fluid passing through this way, then the Fan2 push direction of air flow up to the top of machine for destroy or dis functioning of viruses and bacteria meanwhile the oxygen level no effect. R2 and R3 are the receiver (in the support parts f) to receive electromanetic waves from T2 and T3 of the transmitters to open the upper doors and the lower doors

From d1 to d16 are the points for the operator using the thermometer to check temperature when operating the machine.

U: the hinges

W: the Chord to connect to the power point

V: the box and electrical parts and connect to X (chord connection) to (b)

Y: the wheels at the 4 corners base of the machine.

Side doors are supplementary part of the machines, when operating the machine, all doors are open to allow maximum volume of air fluid passing through this machine

Some Exampies of application of this Machine:

Exampie 4 if a student at school in a class room is identified as a COVID-19 Positive at a normal time in a class room or got a serious dangerous of a virus and easily transfer to other students or teachers at school, then the school do not need to lock do wn if the school have this machine. The Student got a positive test with COVID-19 or any dangerous virus, then that student goes home for self-isolate but that classroom just temporary for students get out of classroom for a few minutes to turn on the machine during this time, the doors and window are closed for air fluid passing this machine more circulating quickly over entire room for a few minutes, then the students can come back in that room for a few minutes later to make sure all virus are killed or dis functioning, then that class room continue as normal, at home that student get COVID- 19 positive or Flue or any got any dangerous virus, then at home should have a machine to operate similar way at school, firstly that student do not transfer the virus to any member of the family by turn on the machine at home, the machine can move any where in the house, secondly that student more faster respond to the sickness due to any virus comes out of the body are killed, keep the air around that person is safety.

Example 5:

Some times in the cold day and windy, the air can mix with the dust, virus and microorganism such as small bacteria, then the wind can blow any where and can pass into the house through the doors and windows or even small holes, then the machine can turn on 1 hour or more to kill or dis functioning of the virus or bacteria mix with the air.

Example 6:

At a hotel quarantine or a normal hotel, some people got COVID-19 positive or Flue or any dangerous virus, after they left the hotel, even though deep clean, but actually, the virus can stay in the air even in that room or can be transfer to the room next to that or sometimes move up to one or more level the same that building. Then other persons even though healthy with COVID-19 negative come in the same this building can get the virus and easily to get sick by transmission of virus in the air, to prevent and treatment for this case, just put this machine on the hotel and turn on the machine, the machine do all the rest, and people do not have to worry anything about transmission if This machine turn on and the machine can do for prevention and treatment of COVID-19 and this machine can be moved into any room and can be used anywhere in the hotel.

Example 7:

In the Crew Ships, the people get sea sick, Flue or COVID-19 or other virus can easily transmission from a person to others people on the same that ships even though the ship is moving and the people already fully vaccinated., but viruses are not moving out of the ship, the virus can transfer from one person to other persons through mainly the nose or the mouth, then using human cells as a host for growth. In this case, the machines are needed on the ship, the operator does the operation of this machine and this machine can be moved from one room to others rooms or anywhere on the ship, to turn on the machine for prevention and treatment of virus.

« Definition of external treatment of Coronavirus: The prevention or the killing process of Coronavirus from environment to human body is called an external treatment of Coronavirus. This is happening in the world today for COVID-19 for positive cases and other type of sickness causing by virus are the main transmission of virus to human in the external case. This including the transferable of virus from a person to a person and also from environment to human body.

Transferable of Coronavirus from a person to person is mainly transferring through the air when one person with a positive case of COVID-19 breath out then the person in nearby can catch the virus through the nose or the mouth or evenly the virus mix up with the air and other persons can catch it later through the nose or mouth.

* Why we need to introduce the external health system type2 for the future:

Since the world Pandemic begin example COVID-19 Pandemic, the impact of the world Pandemic not only to Health and Economy but effect to all sectors jobs, work development, Education program, and actually effect to interna! systems of health and external system type 2. For example, Over 6.5 million people have died just over two and halve years, and many innocent people are died or contaminated by Coronavirus, the vaccine for prevention and the treatment by medicine are belonged to internal system 1, but the world Pandemic solving this problem is not entire the internal systeml but actually the external system2 involve for example social distancing, face masks, deep clean are belong to the external system2. The definition of the hot sport and the report of media such as the announcement of Government for which suburb is the hot sport and this is considered as belong to prevention of COVID-19 in systeml beca use this part of solution is belonged to the prevent outside human body. The real number of COVID-19 cases are actually not exactly the same as the report of internal system 1 because the accuracy report of COVID-19 cases are also depend on the number of people have covid test, if COVID-19 tests are not used or COVID positive not reported and the number of World cases is going down but It does not mean the end of the world Pandemic, Many innocents are died may not reported or many COVID- 19 positive cases not reported, and this machine can be used for applying at homes, Hospitals, Schools, Universities, Shops, companies at work, age care, childcare, Crew Ships, Air Planes and activities indoor.

Description:
HUNG THANH PHAN COVID-19 NEW SOLUTION

Description: HUNG THANH PHAN COVID-19 NEW SOLUTION

(PREVENTION AND TREATMENT OF COVID-19 VIRUS

Including any virus and small bacteria mix with the air).

This machine can be used to operate for all rooms of indoor. Turn on the machine with instruction manual including 3 remote controls, using at homes, Hospitals, Schools, Universities, Shops, companies at work, age care, childcare, Crew Ships, Air Planes, the virus is very small and invisible by human eye but when you turn on the machine then any Virus mix up with the air will be died out or dis-functioning due to the genetic code of its RNA damage, Or DNA damage, Not only the Viruses but also for any small bacteria mix up with the dust in the air are also died out or dis functioning Therefore when it transfers to human body through the nose or the mouth, they cannot growth in the human body even though you haven't got a vaccine yet or have a weak of antibody. Since deep clean is not suitable every day at home, at shops or at work. But the fact is that virus diffuse in the air and the people breadth in above the surface of ground or any floor Level. This machine kills the viruses in the air. The number of types of Viruses are extreme high, as known record in September 2013 the number rises to 100,339,140 Viruses in the world, In 2012 there are 219 Virus species that are known able to infect humans, but the ty pes of the number of viruses are extremely high and also the COVID-19 Virus can mutate to give a new type for example Delta, Omicron, Gamma, Beta, and a lot of different types of Virus are very dangerous to human, As the world record up to 16/08/2022 The number of People were Deaths due to COVID-19 are more than 6.5 million people not including the deaths due to Flue and Cancer. But the Flue is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and sometimes the lungs, there are four types of influenza viruses A, 8, C, and D Human influenza A and 8 viruses cause seasonal Epidemics of disease (known as Flue season) almost every winter in the United States Influenza A viruses are the only influenza viruses known to cause flue Pandemic for example global epidemics of flue disease. Not only viruses can cause Flue and COVID-19 world Pandemic but there are also the number of viruses can cause Cancer. Epstein-Bar virus, Human papilloma virus, Hepatitis B virus, and human Herps Virus B are the four DNA viruses that are capable of causing the development of human cancers, Human T lymphotropic virus type 1 and hepatitis virus type 1 and hepatitis Virus C virus are the two RNA viruses that contribute to human Cancers. Human Timor Viruses and a lot of different types of viruses, and in research up to present time, the number of vaccines are limited known as to prevent for specific viruses since there are large ratio of types of viruses compare to types of Vaccines, in this introduction of new machine to apply for using at homes, Hospitals, schools, Universities, Shops, Companies at work, Age Care, Child Care, Crew Ships, Air Planes these are very huge Jobs that people around the world need to do in the future, but in this new huge application is just the beginning of the New Health system . The introduction of the world in the future will have the two different type of health systems, each health system has the number of subhealth System. In the Present, the whole world has one system and sub divides into different types to solve for mainly the internal system, for example some types of bacteria infect to human body and the doctor give the corresponding type of medicine of antibiotics for treatment of the Patient, this type of treatment is belonged to the Internal System (type!) as the world today have only one this type but different Area of treatment and a lot of different types of disease. The new type introduce today is System type2 for Health system, this is a new system the whole world not yet start up to today, that is the External system (type2 system of Health system). Type 2 system refers to the new Prevention and new treatment for human health in the External of the human body. Why we need the External health system in the future, the reason for this is the huge number of disease it comes from external system before enter into the internal system for example COVID-19 viruses transfer from a person to another person not from internal to internal by itself but actually mainly from a person to the air first before the Virus enter to the internal body of other persons mainly through nose and some by mouse or by skin contacts sometimes or stick on even close and transfer to internal body later by nose, there are a lot pf transferable of types and since the viruses are too small to see by human eye for this reason more than 6.5 million people have died only due to COVID-19, but when fully vaccinated people still get infection of COVID-19 and Flue, This machine is for Prevention and treatment of both COVID-19 viruses and Viruses causing Flue, not only these but can dis functioning of the small bacteria mix in the air as well. The main thing for this description is the application of this new machine to solve for the external system, the vaccine is trying for application of internal system and this machine is for the beginning of the external system. All viruses of COVID-19 arid Flue are passing through external system before entering to the internal system, the doctors are trying for prevention and treatment of internal system only, so that is why in this Paper of Description introduce the new system type2. (the external systems) this will guide to research and services in the future to produce the huge number of jobs and services, this machine will be first application for the new introductory system type 2. (The new system will develop in the future much more by the huge combination of research and service later in the future, researchers and services will develop in the future for the new system type 2 including Doctors, Scientists, Engineering, IT, Services, manufacturing, industries, and many types of companies will be shared the new solution across system 1 and system 2 in the future. This new machine can apply for 9.6 billion people around the world to use for the world pandemic for the presence and for the future.

This machine is look like a Robert to search all different types of Virus or Bacteria then dis function them automatically, we just turn the machine, then the machine does the rest for Prevention and treatment for the external system.

The Structure of the Machine for COVID-19 NEW SOLUTION is containing at least five components (from a to e main parts and additional part f) as following: a) A frame structures

This frame of the machine allows air mixture circulate for the large volume of air passing through the machine in and out again and again. b) Energy source /heat to kill or dis Functioning Viruses or Bacteria:

Heat radiation from the top of machine to down wards to kill or dis functioning of the Virus or Bacteria mix with the air around this part. c) Wind to push the air (Fan 1 outside the machine) moving the air mixture towards the machine entire enclosed space used by circulating the air movement for the room use. d) Temperature check for the entire use especially for checking around and inside the machine

(Using a device to check temperature) e) Direction of air flow (Fan 2): This part drives the large amount of air movement from part (c) to pass inside the machine at this point, the direction of the mixture of the air change again toward the part b, at this point the Virus will be died out or dis functioning, and the air continue circulating. f) Support parts connection of all above with the power source

The following Example mathematical proof of confident for treatment and prevention of

COVID-19 in the air of any region, the virus can diffuse in the air with unlimited volume and the wind can affect to the transmission of the virus in any direction and anywhere around its source with the rate of , where N Is the number of virus at the time t. So how to see the method is work for COVID-19 clearly. For example one particular person with a COVID-19 positive is passing through a particular place outside (not inside the house or the building) and coughing at that point at a time t^ with the number of virus is 1000, and the rate of the number Is decreasuing at that time. in the indoor, the virus is mixed in the air and stay in the air for a long time or short time depend on how do we operate the machine regular or sometimes depend on the place at work or at home, the foilowing is just example how to see clearly apply for using the machine indoor is similar for equation out door, but we need the machine for indoor only, the new solution can be seen clearly how does the machines work effectively for solving the world Pandemic. When you turn on the machine the number of viruses goes down and can be design a lot of different types of equation, this is an example how it works

Example 1 forK > 0

Then

So (2) and substitute this into equation (2), implies

So at time t 0 = 0, -N 0 - 1000 and at time = 2 minutes, N 1 = 10

10 — 10Q0e -2k

Therefore

So k= In 10 = 2.3026

N = 1000e -23026t

Fort = 10 minutes,

Then N - 1000e -2.3026×10 aproximate to zero (0.0000000998) . this example for outdoor, and indoor when the machine turns on, the number of viruses quickly goes down and the persons around the area at work or at home the chance to catch virus Is zero compare to the volume of a ir breadth in and the volume of the air in the space meanwhile machine on the direction of air is tended to move inside the source of energy to kill or dis function of virus. The virus is too small can passing through one level of the building to another room or level for example in hotel quarantine if no machine the virus can spread this way, but if put this machine on there will be safety and similarly in Crew ships, put this machine on will be safety from COVID-19 or Flue transfer from person to person.

(From example 1 above, the given first order linear differential equation we can see clearly how the number of viruses outdoor or indoor with the presence of machine work for the solution of reduce number of viruses clearly without the check of experiment, in this example, the operator when operate this machine can also double check the temperature with the thermometer).

Definition of two different types for prevention and treatment of Coronavirus (The internal and external). a) Definition of external treatment of Coronavirus: The prevention or the killing process of Coronavirus from environment to human body is called an external treatment of Coronavirus. This is happening in the world today for COVID- 19 for positive cases and other type of sickness causing by virus are the main transmission of virus to human in the external case. This including the transferable of virus from a person to a person and also from environment to human body.

Transferable of Coronavirus from a person to person is mainly transferring through the air when one person with a positive case of COVID- 19 breath out then the person in nearby can catch the virus through the nose or the mouth or evenly the virus mix up with the air and other persons can catch it later through the nose or mouth, b) Definition of an internal treatment of Coronavirus: The prevention of the growth or the killing of Coronavirus inside the human body, this including the vaccine, antibody, treatment of medicine. An antibody is a blood protein produced in response to and counteracting a specific antigen, and antibody is also known as an immunoglobulin, a large Y-shaped protein produced mainly by plasma cells that is used by the immune system to neutralize pathogens such as pathogenic bacteria and viruses. Antibodies combine chemical compounds with substances which the body recognizes as alien such as bacteria and viruses. The young people have stronger antibodies than old people. The virus of COVID-19 is very small and diffuse in the air and easily transfer to human body mainly through the nose and the mouth.

Vaccine is used to stimulate the production of antibodies and provide immunity against one or more diseases, and a vaccine is a biological preparation (from a temporary agent of a disease) that provides active acquired immunity to a particular infectious disease. (In this part is the example of the current word doing the internal system). c) Why we need to introduce the external health system type2 for the future:

Since the world Pandemic begin example COVID-19 Pandemic, the impact of the world Pandemic not only to Health and Economy but effect to all sectors jobs, work development. Education program, and actually effect to internal systems of health and external system type 2. For example, Over 6.5 million people have died just over two and halve years, and many innocent people are died or contaminated by Coronavirus, the vaccine for prevention and the treatment by medicine are belonged to internal system 1, but the world Pandemic solving this problem is not entire the internal systeml but actually the external system! involve for example social distancing, face masks, deep clean are belong to the external system!. The definition of the hot sport and the report of media such as the announcement of Government for which suburb is the hot sport and this is considered as belong to prevention of COVID-19 in system! because this part of solution is belonged to the prevent outside human body. The real number of COVID-19 cases are actually not exactly the same as the report of internal system 1 because the accuracy report of COVID-19 cases are also depend on the number of people have covid test, if COVID-19 tests are not used or C0V1D positive not reported and the number of World cases is going down but It does not mean the end of the world Pandemic, Many innocents are died may not reported or many COVID- 19 positive cases not reported, this is an example of mathematical equation of Coronavirus as following.

Example 2: CORONAVIRUS EQUATION

Let C be the number of CQVID-19 at the time t, the following equation is to apply for the COVID-19 in Natural as following

This equation is to forecast the number of Corona virus in the Area A i or in the state or in the country.

Where k is the coefficient of the COVID-19, n is the constant = 3.14, for example in the environment the total management of environment and COVI D-19, this constant is corresponding to the time ti where i= 1, 2, 3...n For the Lab, k is the meaning of the presence of detergent or antibiotics amount, or any chemical to reduce the growth of COVID- 19.

In the human body means the coefficient of t 2 at time t i which means the total immune systems of the human cells including medicine that trap the COVID-19 for example the total anti body plus special antibiotics in addition of special proteins or new vaccine for respond immune systems to the COVID-19.

Since the COVID-19 can growth up according to the maximum number of

2 n is due to duplicate each generation successively (the Virus diplicate not the COVID — 19 coses), where n is the number of period of times that duplicate, but the curve of the case of COV1D-19 can be bend down not only flat at the time t, which mean the total number of cases in the wholeworld will goes up and continue goes up to the timeT 0 , the curve of COVID-19 can be set into different types and different times depend on how we manage it which mean everyone must follow the rule for example follow the rule of social distancing rule, self-isolate, wear PPE or face mask to prevent the transferable of Coronavirus and also the techniques because the COVID-19 is the world crises of the nonlinear case in the history. The main points in this step are to tests which Area has more virus and which Area is not then this put information into computers for others steps for example the cleaner will follow instruction of to clean up where should be not detergent entire the country, the vaccine not yet known accurately, the treatment also not yet sure completely, but this step try prevent the COVID-19 transferable is belonged to both internal type 1-

Example 3: COVID-19 tests cases

When the number of people have tests for COVID-19 negative due to COVID test, but actually the infected can be transfer from a person to another person because the amount of virus in the person small, but the virus can use the human cells as the host for growth up, therefore the positive cases can appear later on.

In any cases of the world Pandemic even though cause by COVID-19, Flue or any new virus mutation or any small bacterial mix up with the dust in the air and unseen by human eye, but we still confident how to solve for the world Pandemic by using this machine. The temperature in the air between 80 to 150° C is to kill all most of Virus and bacteria, but the air at work or at home we cannot put the temperature for the air high temperature due to health and safety. But this machine operates to cope for both the air at work and at home for both to kill or dis function of the virus or bacteria by high temperature at the machine can be more than 300°C at inside the machine and around the machine is normal temperature. This machine can move to anywhere around the house or at work, therefore the world Pandemic in the present or in the future, the country or states or suburb will not lock down if this machine is turn on.

Illustration of parts of the Machine in Figure 1 a) The frame of the machine ABCDEFGH h) Energy source/heater.

R 1 is the receiver in this part to receive electromagnetic wave from

T 1 (the transmitter from remote control). e) Fan2 (R 4 in this Part is the Receiver corresponding to the electromagnetic wave from T 4 the remote control) this part attaches to lower door (front door) of the machine, when the door is open, the Fan2 is the same the surface level of the plane QRST and the top doors also open allow the air fluid passing through this way, then the Fan2 push direction of air flow up to the top of machine for destroy or dis functioning of viruses and bacteria meanwhile the oxygen level no effect.

R 2 and R 3 are the receiver (in the support parts f) to receive electromanetic waves from T 2 and T 3 of the transmitters to open the upper doors and the lower doors

From d 1 to d 16 are the points for the operator using the thermometer to check temperature when operating the machine.

U : the hinge

W: the Chord to connect to the power point

V: the box and electrical parts and connect to X (chord connection) to (b)

Y: the wheels at the 4 corners base of the machine, side doors are supplementary part of the machines, when operating the machine, all doors are open to allow maximum volume of air fluid passing through this machine

Some Examples of application of this Machine:

Example 4

If a student at school in a class room is identified as a COVID-19 Positive at a normal time in a class room or got a serious dangerous of a virus and easily transfer to other students or teachers at school, then the school do not need to lock down if the school have this machine. The Student got a positive test with COVID-19 or any dangerous virus, then that student goes home for self-isolate but that classroom Just temporary for students get out of classroom for a few minutes to turn on the machine during this time, the doors and window are closed for air fluid passing this machine more circulating quickly over entire room for a few minutes, then the students can come back in that room for a few minutes later to make sure all virus are killed or dis functioning, then that class room continue as normal, at home that student get COVID-19 positive or Flue or any got any dangerous virus, then at home should have a machine to operate similar way at school, firstly that student do not transfer the virus to any member of the family by turn on the machine at home, the machine can move anywhere in the house, secondly that, student more faster respond to the sickness due to any virus comes out of the body are killed, keep the air around that person is safety.

Example 5:

Some times in the cold day and windy, the air can mix with the dust, virus and microorganism such as small bacteria, then the wind can blow anywhere and can pass into the house through the doors and windows or even small holes, then the machine can turn on 1 hour or more to kill or dis functioning of the virus or bacteria mix with the air.

Example 6:

At a hotel quarantine or a normal hotel, some people got COVID-19 positive or Flue or any dangerous virus, after they left the hotel, even though deep clean, but actually, the virus can stay in the air even in that room or can be transfer to the room next to that or sometimes move up to one or more level the same that building. Then other persons even though healthy with COVID-19 negative come in the same this building can get the virus and easily to get sick by transmission of virus in the air, to prevent and treatment for this case, just put this machine on the hotel and turn on the machine, the machine do all the rest, and people do not have to worry about this machine can moved into any room and can be used anywhere in the hotel.

Example 7:

In the Crew Ships, the people get sea sick, Flue or COVID-19 or other virus can easily transmission from a person to others people on the same that ships even though the ship is moving and the people already fully vaccinated, but viruses are not moving out of the ship, the virus can transfer from one person to other persons through mainly the nose or the mouth, then using human cells as a host for growth. In this case, the machines are needed on the ship, the operator of this machine can move the machine from one room to others rooms or anywhere on the ship to turn on the machine for prevention and treatment of virus.