Abdalkader AL-Khatib

 No Matter How Good a Design Is, There’s Always a Way to Improve It As I always say, no matter how good a design is, there is always a way to improve it—there is always a better design. This philosophy is especially true in biomedical engineering applied to space exploration, where the human body faces conditions radically different from those on Earth. One of the most significant challenges is how microgravity affects the human body. For example, blood pressure behaves differently outside Earth’s gravity, often pooling in the upper body and causing astronauts to experience dizziness or other physiological changes. Biomedical engineers are studying these effects to design equipment, suits, and systems that better support human health in space. From pressure-regulating suits to improved shoe designs for exercise in low gravity, each innovation aims to mimic Earth-like conditions and mitigate the risks of long-duration missions. Footwear might seem like a minor detail, but in space, ...

Did Dragons Really Exist? Exploring the Historical Accounts Behind the Myth Dragons are one of the most iconic creatures in human history. From Chinese festivals to the Welsh national flag, dragons appear in cultures across the world, separated by oceans and centuries. This widespread presence raises a fascinating question: Were dragons ever real? Surprisingly, the answer is more complex than a simple yes or no. The Global Dragon Phenomenon Dragons are everywhere. In China, dragons symbolize power, prosperity, and control over the elements. In Europe, particularly in medieval stories, dragons were often dangerous beasts to be defeated by noble heroes. Even in Wales, the red dragon is proudly displayed on the national flag. What’s remarkable is that these dragon legends developed in distant regions that had no direct contact for much of history. Why would cultures separated by geography all tell stories about similar creatures? Ancient Writers Who Documented Dragons Some of the earliest...

  Throughout history, humans have looked to the natural world to find symbols that reflect our own traits, values, and struggles. Birds, in particular, have captured our imagination, often representing ideas of freedom, power, and identity. But beneath the surface of these symbols lies a deeper lesson: appearances can be deceiving, and strength takes many forms. The Fastest, The Heaviest, and The Majestic Take, for example, the Peregrine Falcon, the fastest bird in the world, capable of diving at speeds exceeding 240 miles per hour. This sleek hunter embodies precision, agility, and freedom—qualities many admire and aspire to. Contrast that with the Common Ostrich, the heaviest living bird. Flightless and grounded, the ostrich dominates its landscape with raw power and endurance, showing that strength isn’t just about speed or flight. Then there’s the Bald Eagle, a symbol of strength, resilience, and majestic authority. With its commanding presence and sharp eyesight, the eagle rep...

 What is actually an artificial organ we could Define it as following it's an organ that is was manufactured was made by a human to be implanted in the human body either to support or to place a natural organ and the reason the purpose of this is either to regain a function or 00:00:39 functions so the human body or the patient would have a natural and healthy life as possible as we can this is the definition of artificial organs okay so there is a lot of things we should consider when we're designing artificial organ first of all whether this or Oregan is suitable for the patient or not when we should study this from a lot of different aspects first of all decide the the the weight and the volume of the organ whether it was too big okay that of course going to have a negative effect on the patient whether 00:01:23 it was too heavy the we have to study the physical structure of the organ when it was in the form of liquid on the state of gas whatever of course okay and decid...

hello and welcome everyone today I would like to talk about the MRI machine the MRI machine is consist of a giant magnet and this magnet would be made of coil and when we make electrical current goes through this coil it will generate a magnetic field okay and we also use radio waves at the same time so first of all in the human body about 60% of your human body is made of water and water is H C it's H2O okay so the hydrogen atom is very common in the human body and in the hydrogen atom we have one 00:00:45 proton so the point here when we make this human body goes under this magnetic field and the radio waves at the same time the hydrogen atoms would be affected by the magnetic field that we have okay and also there will be when we apply at the same time radio waves we would have interaction between the radio waves and the hydrogen atoms and this interaction would cause a signal that we receive and we process the signal and we will have our 3D image and we use actually liquid hel...

00:00:01 hello and welcome everyone today I would like to talk about maintenance and especially maintenance for medical devices well first of all there's two types of Maintenance there is the CM the corrective maintenance which means the maintenance that happen when the device break down okay and this maintenance Could Happen anytime when the device has a problem second type of maintenance which is PM preventive maintenance means which means a maintenance that I do regularly depends on the protocol and the type of 00:00:39 device and I do this type of Maintenance to prevent the device to break down or to have a problem in the future okay so for example I want to check sensitivity of the valves of the sensors Etc now there is something here if I'm talking about maintenance so there is three important things to clarify about the maintenance questions that I have to ask myself first of all what is the purpose what is the purpose of the device okay in this question I could underst...