منابع مشابه
Luminous Phenomena of Earthquakes: Observations and Theories
Over the past few years, different theories (piezoelectric, positive holes, friction-vaporization, exo-electron emission, tribo- or fracture electrification) have been presented for the interpretation of earthquake lights. Although these theories can interpret earthquake luminous, each suffer from particular problems. There are also ambiguities and questions about the location of the light, the...
متن کاملMeasurements design and phenomena discrimination
The construction of measurements suitable for discriminating signal components produced by phenomena of different nature is considered. The required measurements should be capable of cancelling out those signal components which are to be ignored when focussing on a phenomenon of interest. Under the hypothesis that the subspaces hosting the signal components produced by each phenomenon are compl...
متن کاملThe Total Luminous Efficiency of Luminous Bacteria
Methods are described for measuring the light emitted by an emulsion of luminous bacteria of given thickness, and calculating the light emitted by a single bacterium, measuring 1.1 x 2.2 micra, provided there is no absorption of light in the emulsion. At the same time, the oxygen consumed by a single bacterium was measured by recording the time for the bacteria to use up .9 of the oxygen dissol...
متن کاملLuminous Groups
We investigate the galaxy populations in seven X-ray selected, intermediateredshift groups (0.2 < z < 0.6). Overall, the galaxy populations in these systems are similar to those in clusters at the same redshift; they have large fractions of early-type galaxies (fe ∼ 70%) and small fractions of galaxies with significant star formation (f[OII] ∼ 30%). We do not observe a strong evolution in the g...
متن کاملLuminous Quasars in Luminous Early-Type Host Galaxies
Some recent observations of nearby quasars with HST have apparently failed to detect host galaxies. We review the HST observations as well as near infrared ground-based observations of the same objects. We nd that the quasar hosts can be detected in the HST data if they are smoothed suuciently to reveal low surface brightness. The smooth hosts are very diicult to detect with HST but are more ea...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Science
سال: 1964
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.144.3624.1359