Résultats de "Alan Hall PhD" dans Toutes les catégories

When we look out into the depths of the cosmos, we see that matter isn't evenly distributed. Mixed in amongst the nebulae, galaxies, and whatnot, there are regions that contain massive voids. Some voids are billions of light years in length. One has to ask, then, how visible matter came to be so unevenly distributed. Moreover, why does hadronic matter only account for four percent of the stuff that makes up the universe? This audiobook takes a look at what nothingness is and asks the question - where did everything come from in the first place?

Of all the things we know about the universe, what do we really know about the nature of space? For example, is there a beyond space? Can space exist in the absence of matter? Though it may seem like a dumb question - 'where' does space come from? This essay takes a look at what some scientists have to say on this issue; the work also contains many references on the topic of spacetime and relativity, which should be useful to physics students.

As one of the four forces we currently recognize in the Standard Model, gravity, although relatively weak - is trump card. It is the key to everything. Yet, despite all of this, our knowledge of gravity is incomplete. For example, where does this force come from? How does gravity propagate between objects? Do gravitons really exist? If so, why haven't we identified these hypothetical particles yet? How does gravity relate to space and time? Is gravity stronger in other (hidden) dimensions?

We all wish we had more time. But what is time? How and where did this fourth dimension come about? Can some subatomic particles travel backward in time? What happens to time when gravity gets superstrong? Can the universe go back to the future? This audiobook delves into the nature of time and what some scientists have learned about this strange dimension.

We are all familiar with the force we recognize as electricity right? But where does this amazing force come from? This audiobook explains what electricity is and highlights some of the people who have made major contributions to our knowledge of this force. It also takes a look at what the generation of electrical energy is doing to the climate and contains some references to other sources of information on this topic.

¿Qué constituye exactamente un átomo? ¿Cómo y por qué se formó el universo a la existencia y cómo terminará todo esto? ¿Qué partículas subatómicas van a constituir el modelo estándar? Este ensayo sirve como punto de entrada a la física nuclear y contiene muchas referencias útiles para otros trabajos sobre este y otros temas relacionados. El ensayo también se ocupa de cosas fascinantes.

What exactly constitutes an atom? How and why did the universe come into existence and how will it end? What subatomic particles go to make up the Standard Model? This essay serves as an entry point to nuclear physics and contains many useful references to other work on this and related topics. The essay also deals with other fascinating stuff.

Electrons are the simplest of sub-atomic particles yet despite being the most studied - we still know relatively little about them. This essay summarizes what some scientists have discovered about the electron and how these leptons interact with other particles. The essay also contains references to other literature on this subject.

As a mental disorder, madness lurks within us all. This essay deals with the links between madness, genius, and the self. It takes a look at some famous scientists and mathematicians and their eccentricities. This is a quick guide to how madness arises and more importantly, how we can make sense of madness.

Radiation? What's that all about then? Where does radiation come from? What does it do? This audiobook takes a look at the many different types of radiation including radioactivity, X-rays, and other forms of emissions such as cell phone radiation. It also examines the nuclear power industry and the effects that different types of radiation have on living cells. The book is backed up by references to other works on this topic, and every term used is explained in a jargon-free, easy-to-understand fashion.

How do we remember things? How does a low voltage current passing through the brain improve our ability to do math? How is brain size and shape related to intelligence? Do smart pills really work? This essay discusses these and other issues relating to brain function.

Why do organisms grow old and die? What are the theories of aging? Does the Free Radical Theory of Aging still stack up? How do cells decide when to divide, differentiate or die? What factors accelerate the aging process? This essay takes a look at these issues and would thus be useful to students who want to know more about the processes that control cell death. The essay also documents the more extreme measures that some people have taken in the pursuit of eternal youth.

Recently, some doubts have been expressed as to the notion of taking antioxidant vitamin supplements. Also, some recent studies have shone more light upon the Free Radical Theory of Aging and whether or not free radicals are a good or bad thing. This essay examines the effects of so-called antioxidant vitamins, and whether these supplements are beneficial or potentially harmful.

This essay deals with the topic of death. It covers a number of famous poisoners and the poisons they dispatched to their victims. In addition to the mechanisms of drug action, the subject of apoptosis (programmed cell death) is also discussed. This essay is therefore a resource which can aid students and the layperson interested in drug/toxin action.

What are radio waves? How are they able to travel through empty space? Who discovered "side sparks" and "etheric force"? Despite searching the Universe for signals from other sapient beings we have yet to hear from anyone - why so? This essay takes a look at how radio has transformed society and on the topic of contact with extra solar civilizations it asks the question - what if? The work contains some reference to the basic physics of radio and also alludes to other pertinent work.

We all know about magnetism right? But hold the phone! Where does this force come from in the first place? Did magnetism play a role in the creation of the universe? Why is this force important in everything from atomic structure to the way solar flares form?