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Are you interesting in improving your HAZMAT knowledge?

This software is very interesting to train or improve your knowledge in hazardous materials emergencies, furthermore we will contribute to increase industrial safety.

The main target of this software is to improve your knowledge in road hazardous material accidents, and  moreover you will be able to prove your skills in all kind of accidents.

I recommend it for emergency teams as a training, because it is very important to keep your knowledge up in this kind of situations, it could save lives.

You can download the spanish versión here:

To get other language version you have to contact aself.

In this video you can see a Demo of HazMat 4.0.


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woow sos rescue

Have you ever been in an emergency situation?

Nowadays, we have a great variety of tools to manage this easier. In this article I’m going to talk about an android app for this task, this software could be very useful in emergencies situations because it gives us the possibility to known how to manage it and what are the main steps to achieve the success.


What is woowRescue?

This is an app for mobile devices which is designed to be an Integrated Emergency System, in areas ranging from healthcare to police matters.

What type of emergency does it detect?

The system can automatically detect accidents involving movement, in cars, motorbikes, buses, etc. This means it can also detect sports accidents. The system can launch the mechanisms needed for effectively monitoring the situation, as well as facilitating healthcare attention, speeding up the response times of the different Emergency Services.

It can also detect when people go missing or get lost, providing valid, sensitive information to police services, maximising the possibility of finding the lost person, or in a worst-case scenario, reconstructing the events leading to their disappearance.


How does it work?

The app is installed on any Smartphone (currently Android only), and does not need to be configured by the user to work. It can be active 24 hours a day, constantly monitoring for any possible emergency situations. Everything is designed to work independently and automatically without the active participation of the user.

What problems does the app solve?

The app uses complex mechanisms to detect accidents and disappearances. When it detects an emergency, it can automatically alert the contacts the user has specified as emergency contacts, or the national, provincial, local or any other Emergency Services (*).

As detection is automatic, the emergency alert is sent out at the moment the situation response can save lives and reduce the seriousness of injuries. It also provides sensitive information to police services more quickly, enabling search procedures to be put in place in the case of disappearances.happens, drastically reducing the time between an accident and the arrival of emergency services. This faster response can save lives and reduce the seriousness of injuries. It also provides sensitive information to police services more quickly, enabling search procedures to be put in place in the case of disappearances.

(*) Calls to some Emergency Services cannot be made automatically by Smartphones and require active confirmation by the user. This is due to a security measure implemented by the MANUFACTURERS. We can guarantee these calls will be automatic only in rooted Smartphones or where woowRescue is preinstalled as a system app.

How are the alerts produced?

The app can send alerts via text message, phone call and notifications in the style of messaging programmes.

It includes a very innovative element which allows notifications to be sent to nearby devices whose users have medical expertise, even if they are not known to the app user.

This makes it possible for nearby healthcare personnel to be able to attend the accident victim immediately. If Public Administration decides to take part, it can even send emergency alerts to the nearest ambulance, hospital, or other relevant service.

In the case of disappearances, it sends nearby devices, even if not known to the user, the last known location of the lost person, along with their photograph. This creates a new search method which does not currently exist, where society as a whole takes an active role in the search.

What information is in the notification alerts?

Notifications include a visualisation of the person’s location on a map, their full name, their medical history, a contact phone number, the speed of the accident if relevant, the level of unconsciousness if detected, live access to audio, video and images (*) from the mobile device of the person who needs help, etc.

(*) WOOWAPPS can guarantee only automatic audio recording on all devices. The correct functioning of the other recordings depends on the version and model of Smartphone used.

What information is in the phone alerts?

Emergency alerts via phone call provide: full name, age, ID number, latitude and longitude of the accident, street address, type of emergency, medical history with illnesses, allergies, medication and blood group, speed of accident if relevant, whether the user is unconscious, etc.

What information is in the text alerts?

Emergency text messages are more expensive for users if they are longer, or if they include links, images or any multimedia files, and so our text messages include only the essential information for identifying and finding the user.

All the alert information goes in a single text message, which always contains: the date of the accident, the personal data of the user, the reason for the alert and the location.

What happens if it’s not a real emergency?

Although the system has been developed to make it quite difficult for false accidents or emergencies to be reported, there is a detection method. When the emergency is detected the application vibrates strongly and emits a spoken 30-second countdown, giving the user time to stop the alerts going out. The mobile will vibrate and emit loud sound even in silent mode, as the maximum speaker volume is automatically triggered.

What happens if the user is unconscious after an accident?

The app functions normally. In fact, it was conceived and designed from the start to offer a system which can send out alerts in the most difficult moments, even when the user is unconscious.

In the most extreme cases, the app can speak by itself and communicate verbally with the person receiving the emergency call, giving them information about the accident. The verbal communication is produced by a voice synthesiser installed in the Smartphone, and can be in different languages (English, French, German, Spanish and Italian).

What else can woowRescue do?

Among many options, the system can record audio, images or video during and just after the emergency, and this multimedia content will be accessible to the services receiving the alerts.

The system can identify witnesses to an event, whether an accident, kidnapping, attack, etc.

The app can also identify which people came into contact with a disappeared person, and reconstruct the route taken by a person before they disappeared.

Some typical cases:

A skiing accident can be detected and alerts sent out to contacts and/or the Emergency Services by any or all of the alert methods. This means the user is not left unattended if unconscious, and another person does not need to be present to report the event.

If a child goes suspiciously far from their town or any other location this can be detected and an alert for a possible kidnapping sent out.

The mobile phone of a person with Alzheimer’s can automatically alert family members if the person becomes disoriented and unable to find their way home.

Would you like to get this amazing app?, you can buy it for 9 euros.

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First point to consider in fires of steel-framed buildings (2/11)


The time

Tic, tac, tic, tac…The bell rings and the firefighters go to the fire but, for how long has been the fire running?

This is the most important question we have to ask ourselves when we go to fire in a steel-framed buildings.

We can estimate approximately when the fire has started but it depends if it occurs in the morning, in the afternoon, in the evening or at night. The most difficult task is estimate the fire time at night.

But how could we try to prevent an accident and save our lives in steel framed buildings?

Firstly, I’m going to analyse the steel composition in order to know how the material behaviour is in high temperatures.

Analyzing steel composition

Creep Strength

The high temperature strength of materials is generally expressed in terms of their «creep strength» – the ability of the material to resist distortion over long term exposure to a high temperature. In this regard the austenitic stainless steels are particularly good also stipulate allowable working stresses of each grade at a range of temperatures. The low carbon versions of the standard austenitic grades (Grades 304L and 316L) have reduced strength at high temperature so are not generally used for structural applications at elevated temperatures. «H» versions of each grade (eg 304H) have higher carbon contents for these applications, which results in significantly higher creep strengths. «H» grades are specified for some elevated temperature applications.

Although the duplex stainless steels have good oxidation resistance due to their high chromium contents, they suffer from embrittlement if exposed to temperatures above about 350°C, so they are restricted to applications below this.

Both martensitic and precipitation hardening families of stainless steels have high strengths achieved by thermal treatments; exposure of these grades at temperatures exceeding their heat treatment temperatures will result in permanent softening, so again these grades are seldom used at elevated temperatures.

Structural Stability

The problem of grain boundary carbide precipitation was discussed under intergranular corrosion. This same phenomenon occurs when some stainless steels are exposed in service to temperatures of 425 to 815°C, resulting in a reduction of corrosion resistance which may be significant. If this problem is to be avoided the use of stabilised grades such as Grade 321 or low carbon «L» grades should be considered.

A further problem that some stainless steels have in high temperature applications is the formation of sigma phase. The formation of sigma phase in austenitic steels is dependent on both time and temperature and is different for each type of steel. In general Grade 304 stainless steel is practically immune to sigma phase formation, but not so those grades with higher chromium contents (Grade 310) with molybdenum (Grades 316 and 317) or with higher silicon contents (Grade 314). These grades are all prone to sigma phase formation if exposed for long periods to a temperature of about 590 to 870°C. Sigma phase embrittlement refers to the formation of a precipitate in the steel microstructure over a long period of time within this particular temperature range. The effect of the formation of this phase is to make the steel extremely brittle and failure can occur because of brittle fracture. Once the steel has become embrittled with sigma it is possible to reclaim it by heating the steel to a temperature above the sigma formation temperature range, however this is not always practical. Because sigma phase embrittlement is a serious problem with the high silicon grade 314, this is now unpopular and largely replaced by high nickel alloys or by stainless steels resistant to sigma phase embrittlement, particularly 2111HTR (UNS S30815). Grade 310 is also fairly susceptible to sigma phase formation in the temperature range 590 to 870°C, so this «heat resistant» grade may not be suitable for exposure at this comparatively low temperature range and Grade 321 is often a better choice.

In the following video we can see how the structural stability is affected and finally the building collapse.


Environmental Factors

Other factors which can be important in the use of steels for high temperature applications are carburisation and sulphidation resistance. Sulphur bearing gases under reducing conditions greatly accelerate the attack on stainless alloys with high nickel contents. In some instances Grade 310 has given reasonable service, in others grade S30815, with a lower nickel content is better, but in others a totally nickel-free alloy is superior. If sulphur bearing gases are present under reducing conditions it is suggested that pilot test specimens be first run under similar conditions to determine the best alloy.

Thermal Expansion

A further property that can be relevant in high temperature applications is the thermal expansion of the particular material. The coefficient of thermal expansion is expressed in units of proportional change of length for each degree increase in temperature, usually x10-6/°C, μm/m/°C, or x10-6cm/cm/°C, all of which are identical units. The increase in length (or diameter, thickness, etc) can be readily calculated by multiplying the original dimension by the temperature change by the coefficient of thermal expansion. For example, if a three metre long Grade 304 bar (coefficient of expansion 17.2 μm/m/°C) is heated from 20°C to 200°C, the length increases by:

3.00 x 180 x 17.2 = 9288 μm = 9.3 mm

The coefficient of thermal expansion of the austenitic stainless steels is higher than for most other grades of steel.


Analyzing the Cardington Test

In the slide 31, we can see that the highest temperature was achieved in 57 minutes, if I know exactly when the fire started I can find out approximately which the structure situation is. But if I don’t know this task and I have to go into the building to rescue a person, how could I do this with security? In that case we will need to be able to read the structure signals.


Thermo-cameras are frequently used in firefighter services, we can use this great tool to analyse the structure situation.

The slide 32 show how can we notice the difference between heating and cooling, the squares of the structure are the last part of the structure in heating and the last in cooling, in fact we can estimate what phase occurs at the moment. Moreover, with the thermo-camera we can see which the beam temperature is and know how it is affected.

But it isn’t enough to determinate the security into the structure, there are other points we must be able to evaluate to guarantee the success in this kind of emergency, we will see the second point in the next post.  Please leave your comment, I would be grateful for your feedback.

Source: Atlas Steels Australia