Articles tagged with Energetics
Researchers studied chimpanzees trained on treadmills and found that bipedalism used about 75% less energy and burned 75% fewer calories than quadrupedal walking. The team also discovered that some chimps walked on two legs with similar energy expenditure to knucklewalking.
A new study suggests that walking on two legs, or bipedalism, evolved because it used less energy than quadrupedal knucklewalking. Researchers collected metabolic, kinematic and kinetic data from chimpanzees and humans walking on a treadmill, finding that humans only used one-quarter of the energy as chimpanzees when walking upright.
Researchers found human walking is 75% less costly than chimpanzee quadrupedal and bipedal walking. This energy savings could have given early hominids an edge in foraging for food, potentially driving the evolution of bipedalism.
Researchers discovered two closely related receptors that control energy production and function in the heart. The findings suggest that drugs targeting these receptors may offer a novel approach to managing diseases of the heart muscle, potentially preventing heart failure.
A research team led by Neal Woodbury has uncovered a new view of photosynthesis, revealing the orchestrated movement of proteins on a millionth of a second. This discovery helps explain why changing the energetics didn't knock out photosynthesis, and offers lessons for improving organic solar cells.
The $20 million VERITAS telescope system, developed by Iowa State researchers, is the northern hemisphere's most sensitive instrument for detecting gamma rays. With improved data resolution, scientists can ask more precise questions about space objects and phenomena, such as supermassive black holes and dark matter.
A team of physicists proposes a new mechanism to produce cosmic gamma rays from starlight, challenging existing theories. The new mechanism involves the interaction of fast-moving nuclei with ultraviolet light, producing cosmic gamma rays without requiring extreme electromagnetic fields.
Experts warn of energy insecurity's impact on US national security, driven by heavy oil and gas imports from hostile regions. The US needs to diversify its energy resources and invest in research and development to improve energy efficiency and reduce dependence on foreign sources.
Carnivores can only sustain body mass up to one ton due to energy intake and expenditure limitations. This explains why large predators like lions and modern-day polar bears are relatively small compared to extinct herbivorous mammals.
The University of New Hampshire's Space Science Center will design and build the Energetic Heavy Ion Sensor (EHIS) for the National Oceanic and Atmospheric Administration's (NOAA) third-generation weather satellites. The instrument will monitor energetic particles in space, helping refine computer models to predict space weather events.
A study found that inducing fast thinking can lead to feelings of happiness, energy, creativity, power, and grandiosity. The speed of cognitive processing was as important as the content of thoughts in determining mood. Researchers suggest simple manipulations of thought speed could improve mood and self-esteem.
Researchers developed a new technique to study energetic materials, such as explosives, at the nanoscale. They mapped temperature and length-scale factors that influence their behavior, providing insights into melting, evaporation, and decomposition.
A new theory published in Geophysical Research Letters explains the energization of anomalous cosmic rays by including a realistic termination shock shape. The model shows that particles are accelerated on the flanks of the termination shock, contradicting previous assumptions.
The MAGIC telescope has tracked a long duration gamma-ray burst, GRB050713A, in the X-ray and very high energy gamma ray band. The observation was made possible by rapid tracking of the telescope, which allowed it to start observing the source just 20 seconds after an alert from the Swift satellite.
A total of eight new VHE gamma-ray sources have been found in the Milky Way's disc, doubling known sources at these energies. The discovery includes two 'dark accelerators' without obvious counterparts in other wavelength bands, sparking excitement among astronomers.
An anthropologist suggests a connection between decreasing energy use and declining fertility rates. The availability of energy affects economic activity, leading to a depressed economy which in turn causes a decline in fertility rate. This prediction is based on the link between petroleum consumption and economic conditions.
Researchers at Northeastern University have demonstrated that swinging limbs during running requires significant energy, contrary to previous research. They estimated energy use by measuring blood flow to hind leg muscles of guinea fowl and found swing-phase muscles consume 26% of energy.
Researchers found a positive emotional style was linked with greater resistance to developing a common cold and decreases in clinical colds, while a negative emotional style had no effect on getting sick. Inflammation chemicals may link the positive emotional style with illness.
Astronomers have discovered four massive stellar clusters with stars as massive as 120 solar masses in the Milky Way's W49 molecular cloud. This reveals the true sources of enormous energy powering a giant HII region, solving decades of speculation.
Researchers have discovered that mountain streams follow a rhythmic pattern in their step-pool sequences, dissipating energy through vertical adjustments. This finding sheds new light on the complex dynamics of high-gradient mountain streams.
Researchers at UCR's CE-CERT are developing a way to convert wet waste, such as sewage sludge and grass clippings, into synthetic diesel fuel and electricity. The process has the potential to produce up to 26 barrels of fuel and 34 megawatt-hours of electricity per day.
A Harvard research team studied human running on various surface stiffnesses, finding a 12.5-fold decrease in surface stiffness led to a 12% decrease in metabolic rate and a 29% increase in leg stiffness, with support mechanics remaining unchanged.
A team of UW researchers has determined a more precise solar neutrino production figure, finding that the fusion rate is 17% greater than previously estimated. This new finding means the sun must be producing 17% more energetic neutrinos, with an accuracy of 3-4 percentage points.