OYENTE

Jihad H. Al-Sadah

  • 4
  • opiniones
  • 0
  • votos útiles
  • 19
  • calificaciones

Informative and not too long

Total
5 out of 5 stars
Ejecución
5 out of 5 stars
Historia
5 out of 5 stars

Revisado: 01-10-25

Well written, informative, to the point. The author could have gone to much more content but kept the story line around his personal experience of abstaining coffee for 3 months.

Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.

Has calificado esta reseña.

Reportaste esta reseña

Good content

Total
4 out of 5 stars
Ejecución
5 out of 5 stars
Historia
4 out of 5 stars

Revisado: 12-24-23

Excellent content with insightful link between dust and water. Less content than desired on air quality technical aspects.

Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.

Has calificado esta reseña.

Reportaste esta reseña

EROI concept and solar missed

Total
3 out of 5 stars
Ejecución
4 out of 5 stars
Historia
3 out of 5 stars

Revisado: 12-27-21

The book presents good insights in various topical area. However, a consistent theme is that fossil fuel is diminishing and nothing can be done about it. Humanities and cultures has to adapt in stages.

In defining the concept of "net energy", the author misunderstand the concept of energy return on energy investment. Yes, fossil fuel and tar sand are low in "net energy" or low EROI and this applies to bioethanol. However, in energy research circles the EROI is not fixed but subject to two factors: source deterioration (or less probable improvement) and technology improvement.
The author is ignoring solar energy and labeling it as low in "net energy" permanently. This is not the case, Currently, solar energy has improved to a great extent becoming in some geographies the cheapest energy source ever (2 us cents per kWh). We expect lowering of this cost further in future. Concentrated fossil fuels are dense, yes, but synthetic fuels can be made using cheap electricity from solar and wind. Transportation can be electric (trains and cars) and the aviation can use synthetic fuels or continue to use fossil fuels (with balancing carbon capture).

Is there possibility of technological collapse? may be. However, it is also possible that humanity under improved renewable electricity could usher a new era of improvment.

Energy is dynamic and improvements and deteriorations are acting at the same time. Energy efficiency in using the energy could reduce the energy needs. It has been demenstrated that a building can be kept worm not by an external energy but thermal energy of the sources inside (human bodies, electrical and electronic equipment).

Negative future is possible but positive future is possible too. We can steer toward a good one.

Best, JH, physicst and inventor

Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.

Has calificado esta reseña.

Reportaste esta reseña

Wide and good coverage

Total
4 out of 5 stars
Ejecución
5 out of 5 stars
Historia
4 out of 5 stars

Revisado: 04-02-18

Nice book but lacks depth in some of the topics covered. Numbers presented are not always properly scaled.

Se ha producido un error. Vuelve a intentarlo dentro de unos minutos.

Has calificado esta reseña.

Reportaste esta reseña

adbl_web_global_use_to_activate_webcro805_stickypopup