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December 31 2014

Archimedes
14:34
Final words of 2014.
Tags: untagged
Reposted bygruetzenitroventjarekpolskezbawrecognitionRekrut-KashenmoteSirenensangincontrovertiblelvcksschottladen

December 28 2014

Archimedes
15:47
Happy 2015!
Tags: untagged

December 23 2014

Archimedes
22:14

Corticothalamic phase synchrony and cross-frequency coupling predict human memory formation
by Catherine M Sweeney-Reed, Friedhelm C Schmitt, Alan Richardson-Klavehn et al.
eLife 2014;10.7554/eLife.05352
DOI: http://dx.doi.org/10.7554/eLife.05352
http://elifesciences.org/content/early/2014/12/23/eLife.05352.full.pdf (December 23, 2014)


Abstract
The anterior thalamic nucleus (ATN) is thought to play an important role in a brain network involving the hippocampus and neocortex, which enables human memories to be formed. However, its small size and location deep within the brain have impeded direct investigation in humans with non-invasive techniques. Here we provide direct evidence for a functional role for the ATN in memory formation from rare simultaneous human intrathalamic and scalp electroencephalogram (EEG) recordings from 8 volunteering patients receiving intrathalamic electrodes implanted for the treatment of epilepsy, demonstrating real-time communication between neocortex and ATN during successful memory encoding. Neocortical-ATN theta oscillatory phase synchrony of local field potentials and neocortical-theta-to-ATN-gamma cross-frequency coupling during presentation of complex photographic scenes predicted later memory for the pictures, demonstrating a key role for the ATN in human memory encoding.
Tags: science
Reposted bysciencemondkroete

December 22 2014

Archimedes
23:03
Simultaneously warming up and illuminating x-mas dinner.
(Kids, don't try this at home!)
Tags: untagged
Reposted byc4osnazguhihenrykathalisgafmoepimondkroetebastinat0rkrybussoupeterlatheamisseccentricgreymatterheatrissHypothermiatawcoloredgrayscalePsaikokocikapucRekrut-Ksmoke11KurkaWyluzujRelentless86drowfxstraycatznuhdeletemeeoskiOsorkoniusmolotovcupcakepolaczettoune-raconteusefallendebillisalhabcdanoniskonazguhlQdeuhannesaVoXhappymealenidkapelsenprauschernaichschottladenbradypusfnk4tichgahornypigeonmetafnordapertureMeeresbrautero-Neojalokim0SakerosNisilisternenseemannjaphypassingbirdFate46sucznikbugiepunishergurskihemsbeachpulegonStagedocqueslovaortizillaiamawinrarbesenskillzmcflyQudacimichalkoziolImmortalysdantemplagketiambabsinotthesamejottosneoraidernerdanellifutelegnomNaitliszgruetze1stmachinefadenbcampaignerslovadrink-mejuhudoraschaafPaseroVirusskizzomsbqckisbackBimJeamrepostedfromxmwsommteckamarusbawelnianaAryessbtwotchjbeaniwashopelessPewPowwd40stopssqueaksInteiksvierkubek8elfiklofithedarknessaroundmealekozlowskalubimaexviceerweirdscenesinsidethegoldminesilshal4desu-mizugrubyxannzscorpmstrztgshusan93feuerrotfpletzneonu-ditpfannkuchengpkvtPhlogistonblubbermontakCarridwenmynniabluestarStenzerrecognitionsofiasankinniggertitsrzeszowyoannthorbenkrybus
Archimedes
01:12

Useful hints for prospective illegal immigrants,
by CIA (via WikiLeaks):


Surviving Secondary
An Identity Threat Assessment of
Secondary Screening Procedures at
International Airports


PDF-download: https://wikileaks.org/cia-travel/
Tags: politics
Reposted bybesenzerocool911
Archimedes
00:07

Dissent: accountable anonymous group communication

by dedis@yale (http://dedis.cs.yale.edu/)

The Dissent project is a research collaboration between Yale University and UT Austin to create a powerful, practical anonymous group communication system offering strong, provable security guarantees with reasonable efficiency. Dissent's technical approach differs in two fundamental ways from the traditional relay-based approaches used by systems such as Tor:

#    Dissent builds on dining cryptographers and verifiable shuffle algorithms to offer provable anonymity guarantees, even in the face of traffic analysis attacks, of the kinds likely to be feasible for authoritarian governments and their state-controlled ISPs for example.

#    Dissent seeks to offer accountable anonymity, giving users strong guarantees of anonymity while also protecting online groups or forums from anonymous abuse such as spam, Sybil attacks, and sockpuppetry. Unlike other systems, Dissent can guarantee that each user of an online forum gets exactly one bandwidth share, one vote, or one pseudonym, which other users can block in the event of misbehavior.

Dissent offers an anonymous communication substrate intended primarily for applications built on a broadcast communication model: for example, bulletin boards, wikis, auctions, or voting. Users of an online group obtain cryptographic guarantees of sender and receiver anonymity, message integrity, disruption resistance, proportionality, and location hiding.

Continue: http://dedis.cs.yale.edu/dissent/

Source Code: https://github.com/DeDiS/Dissent
Tags: science
Reposted bysciencesydnorsofiasquicquidbrightbyteBadukBosimplex

December 21 2014

Archimedes
19:47
... so Christmas!
Tags: untagged
Reposted byarrrrrrrrjemkartofleIhezal

December 19 2014

Archimedes
12:45

NASA’s Kepler Reborn, Makes First Exoplanet Find of New Mission
December 18, 2014 (RELEASE 14-335)

NASA's planet-hunting Kepler spacecraft makes a comeback with the discovery of the first exoplanet found using its new mission -- K2.

The discovery was made when astronomers and engineers devised an ingenious way to repurpose Kepler for the K2 mission and continue its search of the cosmos for other worlds.

"Last summer, the possibility of a scientifically productive mission for Kepler after its reaction wheel failure in its extended mission was not part of the conversation," said Paul Hertz, NASA's astrophysics division director at the agency's headquarters in Washington. "Today, thanks to an innovative idea and lots of hard work by the NASA and Ball Aerospace team, Kepler may well deliver the first candidates for follow-up study by the James Webb Space Telescope to characterize the atmospheres of distant worlds and search for signatures of life."

Lead researcher Andrew Vanderburg, a graduate student at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, studied publicly available data collected by the spacecraft during a test of K2 in February 2014. The discovery was confirmed with measurements taken by the HARPS-North spectrograph of the Telescopio Nazionale Galileo in the Canary Islands, which captured the wobble of the star caused by the planet’s gravitational tug as it orbits.

The newly confirmed planet, HIP 116454b, is 2.5 times the diameter of Earth and follows a close, nine-day orbit around a star that is smaller and cooler than our sun, making the planet too hot for life as we know it. HIP 116454b and its star are 180 light-years from Earth, toward the constellation Pisces.

Kepler’s onboard camera detects planets by looking for transits -- when a distant star dims slightly as a planet crosses in front of it. The smaller the planet, the weaker the dimming, so brightness measurements must be exquisitely precise. To enable that precision, the spacecraft must maintain steady pointing. In May 2013, data collection during Kepler's extended prime mission came to an end with the failure of the second of four reaction wheels, which are used to stabilize the spacecraft.

Rather than giving up on the stalwart spacecraft, a team of scientists and engineers crafted a resourceful strategy to use pressure from sunlight as a “virtual reaction wheel” to help control the spacecraft. The resulting K2 mission promises to not only continue Kepler’s planet hunt, but also to expand the search to bright nearby stars that harbor planets that can be studied in detail and better understand their composition. K2 also will introduce new opportunities to observe star clusters, active galaxies and supernovae.

Small planets like HIP 116454b, orbiting nearby bright stars, are a scientific sweet spot for K2 as they are good prospects for follow-up ground studies to obtain mass measurements. Using K2’s size measurements and ground-based mass measurements, astronomers can calculate the density of a planet to determine whether it is likely a rocky, watery or gaseous world.

"The Kepler mission showed us that planets larger in size than Earth and smaller than Neptune are common in the galaxy, yet they are absent in our solar system," said Steve Howell, Kepler/K2 project scientist at NASA's Ames Research Center in Moffett Field, California. "K2 is uniquely positioned to dramatically refine our understanding of these alien worlds and further define the boundary between rocky worlds like Earth and ice giants like Neptune."

Since the K2 mission officially began in May 2014, it has observed more than 35,000 stars and collected data on star clusters, dense star-forming regions, and several planetary objects within our own solar system. It is currently in its third campaign.

The research paper reporting this discovery has been accepted for publication in The Astrophysical Journal.

Ames is responsible for Kepler's mission concept, ground system development, science data analysis and K2 mission operations. NASA's Jet Propulsion Laboratory in Pasadena, California, managed Kepler mission development. Ball Aerospace & Technologies Corp. in Boulder, Colorado, developed the Kepler flight system and supports mission operations with the Laboratory for Atmospheric and Space Physics at the University of Colorado in Boulder. The Space Telescope Science Institute in Baltimore archives, hosts and distributes Kepler science data. Kepler is NASA's 10th Discovery Mission and was funded by the agency's Science Mission Directorate in Washington.

http://www.nasa.gov/kepler
Tags: science
Reposted byastronomygroupsciencejalokim0vogeladremdicoQdeu

December 18 2014

Archimedes
20:59

Truffles make cannabis-like high

The black truffle (Tuber melanosporum) contains anandamide.
by Nic Fleming (BBC)

[...] Mauro Maccarrone, of the Campus Bio-Medico University of Rome, Italy, and colleagues have revealed the highly-prized fungi produce anandamide, a compound that triggers the release of mood-enhancing chemicals in the human brain, and does so using the same biological mechanism as tetrahydrocannabinol (THC), the chemical responsible for producing the mind-bending effects of marijuana.

Maccarrone believes truffles use it to attract animals to eat their fruiting bodies, so that their spores are spread more widely and they have a better chance of reproducing.

Black truffles get their colour from dark melanin pigments. Research published by Maccarrone and his colleagues in 2012 showed that in humans melanin production is triggered by the release of anandamide. Some scientists call the compound the bliss molecule because of its role in mood, appetite, memory, pain, depression and fertility. Its name comes from “ananda”, the Sanskrit word for extreme delight or bliss. [...]

Truffles contain endocannabinoid metabolic enzymes and anandamide
by Mauro Maccarrone, Giovanni Pacioni, Cinzia Rapino, et al.
Phytochemistry, , Available online 26 November 2014,
doi:10.1016/j.phytochem.2014.11.012


Abstract
Truffles are the fruiting body of fungi, members of the Ascomycota phylum endowed with major gastronomic and commercial value. The development and maturation of their reproductive structure are dependent on melanin synthesis. Since anandamide, a prominent member of the endocannabinoid system (ECS), is responsible for melanin synthesis in normal human epidermal melanocytes, we thought that ECS might be present also in truffles. Here, we show the expression, at the transcriptional and translational levels, of most ECS components in the black truffle Tuber melanosporum Vittad. at maturation stage VI. Indeed, by means of molecular biology and immunochemical techniques, we found that truffles contain the major metabolic enzymes of the ECS, while they do not express the most relevant endocannabinoid-binding receptors. In addition, we measured anandamide content in truffles, at different maturation stages (from III to VI), through liquid chromatography–mass spectrometric analysis, whereas the other relevant endocannabinoid 2-arachidonoylglycerol was below the detection limit.
  Overall, our unprecedented results suggest that anandamide and ECS metabolic enzymes have evolved earlier than endocannabinoid-binding receptors, and that anandamide might be an ancient attractant to truffle eaters, that are well-equipped with endocannabinoid-binding receptors.

http://www.researchgate.net/publication/269035055_Truffles_contain_endocannabinoid_metabolic_enzymes_and_anandamide
Tags: science
Reposted bydrugsscienceJimjohnambassadorofdumbvogelyubabac4osmakroszielonyszalik
Archimedes
00:21
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(just behind the Supreme Court of the Australian Capital Territory)
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Australia
Tags: untagged

December 16 2014

Archimedes
23:50
Data graphed here are examples from the Sample Analysis at Mars (SAM) laboratory's detection of Martian organics in a sample of powder that the drill on NASA's Curiosity Mars rover collected from a rock target called "Cumberland." (Image credit: NASA/JPL-Caltech)

December 16, 2014
NASA Rover Finds Active and Ancient Organic Chemistry on Mars


Research Papers:

Mars methane detection and variability at Gale crater

by NASA research team
Science DOI: 10.1126/science.1261713
Published Online December 16 2014


Abstract
Reports of plumes or patches of methane in the Martian atmosphere that vary over monthly timescales have defied explanation to date. From in situ measurements made over a 20-month period by the Tunable Laser Spectrometer (TLS) of the Sample Analysis at Mars (SAM) instrument suite on Curiosity at Gale Crater, we report detection of background levels of atmospheric methane of mean value 0.69 ± 0.25 ppbv at the 95% confidence interval (CI). This abundance is lower than model estimates of ultraviolet (UV) degradation of accreted interplanetary dust particles (IDP’s) or carbonaceous chondrite material. Additionally, in four sequential measurements spanning a 60-sol period, we observed elevated levels of methane of 7.2 ± 2.1 (95% CI) ppbv implying that Mars is episodically producing methane from an additional unknown source.
(Probably just effluvia from the heated drill --Archimedes)

The imprint of atmospheric evolution in the D/H of Hesperian clay minerals on Mars
by NASA research team
Science DOI: 10.1126/science.1260291
Published Online December 16 2014


Abstract
The deuterium to hydrogen (D/H) ratio in strongly bound water or hydroxyl groups in ancient martian clays retains the imprint of the water of formation of these minerals. Curiosity’s Sample Analysis at Mars (SAM) experiment measured thermally evolved water and hydrogen gas released between 550°C and 950°C from samples of Hesperian era Gale crater smectite to determine this isotope ratio. The D/H value is 3.0 (±0.2) times the ratio in Standard Mean Ocean Water (SMOW). The D/H ratio in this ~3 billion year old mudstone that is half that of the present martian atmosphere but substantially higher than that expected in very early Mars indicates an extended history of hydrogen escape and desiccation of the planet.
Tags: science
Reposted byastronomygroupscienceukashi
Archimedes
15:22

The British Medical Journal
Christmas 2014: Going to Extremes

Special Research Edition
http://www.bmj.com/thebmj

Effect of monthly vitamin D3 supplementation in healthy adults on adverse effects of earthquakes: randomised controlled trial
by Sandy Slow, Christopher M Florkowski, Stephen T Chambers, et al.
BMJ 2014; 349 doi: http://dx.doi.org/10.1136/bmj.g7260 (Published 16 December 2014)

Objective To determine whether supplementation with vitamin D improves resilience to the adverse effects of earthquakes.
Design Opportunistic addition to an established randomised double blind placebo controlled trial.
Setting Christchurch, New Zealand, where a prolonged series of catastrophic earthquakes beginning on 4 September 2010 occurred, which caused widespread destruction, fatalities, and extensive psychological damage.
Participants 322 healthy adults (241 women; 81 men) aged 18-67 who were already participating in the vitamin D and acute respiratory infections study (VIDARIS) between February 2010 and November 2011.
Intervention Participants were randomised to receive an oral dose of either 200 000 IU vitamin D3 monthly for two months then 100 000 IU monthly (n=161) or placebo (n=161) for a total of 18 months.
Main outcome measure This is a post hoc analysis from the previously published VIDARIS trial. The primary endpoint in the current analysis was the self reported effects and overall adverse impact of the Christchurch earthquakes as assessed by questionnaire four months after the most destructive earthquake on 22 February 2011, which was used as the index event. The secondary end point was the number of “psychological” adverse events that participants reported at their usual monthly appointments as part of the original VIDARIS trial.
Results 308 participants completed the earthquake impact questionnaire (n=152 in the vitamin D group and 156 in the placebo group). There was no significant difference in the number of self reported adverse effects between those receiving vitamin D supplementation and those receiving placebo. There was also no difference in the overall adverse impact score between treatment groups (χ2 P=0.44). The exception was that those in the vitamin D group experienced more adverse effects on family relationships (22% v 13%; χ2 P=0.03). The number of psychological adverse events—such as fatigue, stress, anxiety, and insomnia—that participants reported at their usual monthly appointments was significantly higher after the earthquake (χ2 P=0.007) but did not differ between treatment groups.
Conclusion In this trial, vitamin D supplementation did not reduce the adverse impact of earthquakes in healthy adults.


The Darwin Awards: sex differences in idiotic behaviour
by Ben Alexander Daniel Lendrem, Dennis William Lendrem, Andy Gray,J ohn Dudley Isaacs
BMJ 2014; 349 doi: http://dx.doi.org/10.1136/bmj.g7094 (Published 11 December 2014)

Abstract
Sex differences in risk seeking behaviour, emergency hospital admissions, and mortality are well documented. However, little is known about sex differences in idiotic risk taking behaviour. This paper reviews the data on winners of the Darwin Award over a 20 year period (1995-2014). Winners of the Darwin Award must eliminate themselves from the gene pool in such an idiotic manner that their action ensures one less idiot will survive. This paper reports a marked sex difference in Darwin Award winners: males are significantly more likely to receive the award than females (P<0.0001). We discuss some of the reasons for this difference.


The association between exaggeration in health related science news and academic press releases: retrospective observational study
by Petroc Sumner, Solveiga Vivian-Griffiths, Jacky Boivin, et al.
BMJ 2014; 349 doi: http://dx.doi.org/10.1136/bmj.g7015 (Published 10 December 2014)

Objective
To identify the source (press releases or news) of distortions, exaggerations, or changes to the main conclusions drawn from research that could potentially influence a reader’s health related behaviour.
Design Retrospective quantitative content analysis.
Setting Journal articles, press releases, and related news, with accompanying simulations.
Sample Press releases (n=462) on biomedical and health related science issued by 20 leading UK universities in 2011, alongside their associated peer reviewed research papers and news stories (n=668).
Main outcome measures Advice to readers to change behaviour, causal statements drawn from correlational research, and inference to humans from animal research that went beyond those in the associated peer reviewed papers.
Results 40% (95% confidence interval 33% to 46%) of the press releases contained exaggerated advice, 33% (26% to 40%) contained exaggerated causal claims, and 36% (28% to 46%) contained exaggerated inference to humans from animal research. When press releases contained such exaggeration, 58% (95% confidence interval 48% to 68%), 81% (70% to 93%), and 86% (77% to 95%) of news stories, respectively, contained similar exaggeration, compared with exaggeration rates of 17% (10% to 24%), 18% (9% to 27%), and 10% (0% to 19%) in news when the press releases were not exaggerated. Odds ratios for each category of analysis were 6.5 (95% confidence interval 3.5 to 12), 20 (7.6 to 51), and 56 (15 to 211). At the same time, there was little evidence that exaggeration in press releases increased the uptake of news.
Conclusions Exaggeration in news is strongly associated with exaggeration in press releases. Improving the accuracy of academic press releases could represent a key opportunity for reducing misleading health related news.
Tags: science
Reposted byscienceSpecies5618mondkroeteeglerion-justforfun

December 13 2014

Archimedes
01:06
John Kiriakou (*9 Aug 1964) presently imprisoned in Loretto, Pennsylvania. (The New York Times, Jan 25, 2013)

Federation of American Scientists / Project on Government Secrecy:
USA v. John Kiriakou: Selected Case Files
Tags: politics
Reposted bybesenjabolmaxdychterFyrstepimetheus

December 12 2014

Archimedes
21:24
Anne-Catrin Märzke (actress & singer)
(new homepage)
Tags: arts
Reposted byberlin berlin
Archimedes
00:36
Zeitgenössische Mutmaßung über den tatsächlichen Antrieb des Besslerschen Perpetuum mobile (1716).

Asche zu Asche
Jeremy Rifkin träumt von einer besseren Welt

(Süddeutsche Zeitung, 2. September 2002, Seite 16)

Die Welt geht zugrunde, soviel ist gewiss, und zwar aus einer ganzen Reihe von Gründen. Beispielsweise durch die Klimakatastrophe, ausgelöst vom Treibhauseffekt der Abgase bei der Verbrennung fossiler Brennstoffe. Oder durch Fundamentalismus und Terrorismus, welche – wen wundert’s? – gerade in der Bevölkerung über den letzten verbliebenen Ölquellen in Saudi-Arabien, Irak und Iran ihre mächtigste Brutstätten haben. Aber noch vor allem übrigen müssen wir aus dem offensichtlichen Grund mit dem baldigen Ende unserer Zivilisation – so wie wir sie kennen – rechnen, dass uns schlicht die Ressourcen ausgehen.

Sämtliche bekannten Öl- und Gaslager reichen bei gleichbleibender Förderleistung nur noch ein paar Jahrzehnte. Dann ist Schluss. Alle übrigen apokalyptischen Szenarien der Menschheit sind mit dem einen oder anderen Vielleicht behaftet – ob Klimakatastrophe, Asteroideneinschlag, Seuchen oder al-Qaida –, aber dass die Energiequellen, die gegenwärtig fast ausschließlich den Energiebedarf der Industrienationen befriedigen, endlich und sehr begrenzt sind, daran gibt es keinen Zweifel. Dann gehen die Lichter aus, Wohnungen werden kalt, die Autos bleiben stehen, das Internet wird abgeschaltet. Die Zivilisation fällt zurück ins Mittelalter. Wenn keine Alternative gefunden wird.

Erfreulich, dass sich nun Jeremy Rifkin, einer der profiliertesten unter den amerikanischen Intellektuellen und Feuilletonisten, in seinem neuesten Buch gerade dieses Zukunftsproblems annimmt. Pünktlich zum Weltumweltgipfel in Johannesburg erscheint sein Beitrag. Zuletzt war die Endlichkeit der Ressourcen während der Ölkrisen der siebziger Jahre ein zentrales öffentliches Thema. Damals galten Atomkraft und die Forschung an Fusionsreaktoren als Silberstreif am Horizont – an den kostenlosen Strom für alle und in jeder Menge, gewonnen aus dem Wasserstoff der Weltmeere, durfte man als wissenschaftlich fundierte Zukunftsvision glauben. Zwischenzeitlich wurden viele Kernkraftwerke stillgelegt und viel Öl verbrannt, aber eine realistische Alternative zum fossilen Brennstoff wurde nicht gefunden. Noch bevor die „freiwilligen Vereinbarungen“ zur Reduktion der klimaschädlichen CO2-Emission ein nennenswertes Niveau erreichen werden, könnte uns schlicht der fossile Nachschub ausgehen, um noch weiter Kohlendioxidabgase in die Atmosphäre pusten zu können.

Jeremy Rifkin hat nicht nur eine rhetorisch scharfe Anklageschrift gegen die Verantwortungslosigkeit der heutigen Energiewirtschaft geschrieben, er präsentiert auch einen Alternativvorschlag. Die Lösung liegt für ihn in der Energie des Wasserstoffs. Nicht in seiner Energie bei der Kernfusion zu Helium, sondern bei der gewöhnlichen chemischen Verbrennung zu Wasser. Rifkin stellt sich eine Welt von vielen dezentralen Brennstoffzellen vor, die Wasserstoff zu Wasser verbrennen und ein demokratisches Energienetz bilden. „Wasserstoff ist das leichteste und einfachste Element im Universum. Es existiert überall und produziert keine schädlichen Kohlendioxidemission. Die ersten Brennstoffzellen auf Wasserstoffbasis werden bereits in Wohnhäusern und Büros eingesetzt. Wasserstoffbetriebene Autos, Busse und Lastwagen sind in einigen Jahren serienreif.“

Hier staunt der Laie: Überall auf der Erde findet sich zwar Wasser, also die „Asche“ der Verbrennung von Wasserstoff, aber freier Wasserstoff nirgendwo. Also woher den Treibstoff für Rifkins Brennstoffzellen nehmen? Genau: Aus dem Wasser, durch chemische Trennung. Und hier wird es wunderlich. Könnte es sein – dieses beklemmende Gefühl schleicht sich beim Lesen ein und wächst im Laufe des Buchs zu einem handfesten Erschrecken – dass Rifkin noch nie etwas von Thermodynamik und Energieerhaltung gehört hat?

Im ganzen Buch geht es holterdipolter durch die Naturwissenschaften. Energie und Leistung werden regelmäßig verwechselt, Volumen und Fläche, Geschwindigkeit und Entfernung – dies alles ist wesentlich schlimmer als ein Orthografie- oder Grammatikfehler je sein kann, aber warum achtet der Lektor nicht darauf? Oder auf offensichtliche Selbstwidersprüche: Da wird mitgeteilt, dass sich Brennstoffzellen vor allem dort rechnen, wo ein Stromkunde so abseits wohnt, dass das Stromkabel zum zentralen Kraftwerk hohe Kapitalkosten verursacht. Im nächsten Absatz wird die Vernetzung all dieser Brennstoffzellen vorausgesetzt – offenbar mit Stromkabeln.

Offensichtlich muss Wasserstoff, bevor er in Brennstoffzellen verbrannt werden kann, aus Wasser gewonnen werden. Dafür kann man Erdgas oder elektrischen Strom nehmen; aber offensichtlich ist die verwertbare Energiemenge im Wasserstoff kleiner als die, die vorher im Erdgas oder im Strom war, weil keine Energieumwandlung mit hundertprozentigem Wirkungsgrad funktioniert. Es entsteht also die Frage, warum man die Energiekrise nicht gleich mit Erdgas oder Strom beseitigt, ohne den Umweg über den Wasserstoff. Strom findet sich schließlich überall in den Steckdosen.

Das Thema ist zu ernst für Witze. Die Welt geht zugrunde und die einzigen, die ihre Stimme erheben, sind medienheischende Ignoranten. ULRICH KÜHNE

JEREMY RIFKIN: Die H2-Revolution. Wenn es kein Öl mehr gibt. Mit neuer Energie für eine gerechte Weltwirtschaft. Deutsch von Brigitte Kleidt. Campus Verlag, Frankfurt am Main 2002. 304 Seiten, 25,50 Euro.

December 10 2014

Archimedes
15:32
Most likely final resting place of MH370
(by assumption of The Independent Group, Archimedes, and others):

Underwater Search Area 2 (outlined on map in magenta)
searched by FUGRO DISCOVERY since 4 December 2014.

MH370 Operational Search Update, 10 December 2014
by the  Joint Agency Coordination Centre (JACC) to coordinate the Australian Government's support for the search into missing flight MH370:
http://www.jacc.gov.au/families/operational_reports/files/MH370_Operational_Search_Update_20141210_EN.pdf

UPDATE — 17 December 2014:
"On Saturday 13 December, Fugro Discovery experienced a system issue with a component of the search equipment. Search activities have been suspended while the issue is remedied."
Tags: untagged
Archimedes
15:14
Synthetic aperture sonar acoustic image of the seafloor gathered by GO Phoenix in the Indian Ocean, searching for MH370.
(Source: Phoenix International & SL Hydrospheric.)
Reposted bysciencemlusk
Archimedes
02:17

(Reliable) Analysis of MH370 Final Major Turn Timing

by Michael Exner, Richard Godfrey, Sid Bennett (Members of the Independent Group), December 8, 2014

https://www.dropbox.com/s/ra7ylx9la7p4l7u/MH370%20Final%20Major%20Turn_Rev2.pdf?dl=0
Tags: untagged

December 09 2014

Archimedes
23:04
Archimedes
19:45
(Photo by Lomonosov Moscow State University)

Asteroid 2014 UR116, A 400-meter Sized Near-Earth Asteroid, Represents No Threat to the Earth
(NASA/JPL Near-Earth Object Program Office / December 8, 2014 / http://neo.jpl.nasa.gov/news/news187.html)

Some recent press reports have suggested that an asteroid designated 2014 UR116, found on October 27, 2014, at the MASTER-II observatory in Kislovodsk, Russia, represents an impact threat to the Earth. While this approximately 400-meter sized asteroid has a three year orbital period around the sun and returns to the Earth's neighborhood periodically, it does not represent a threat because its orbital path does not pass sufficiently close to the Earth's orbit.

Furthermore, Tim Spahr, Director of the Minor Planet Center in Cambridge Massachusetts, has also re-computed this object's orbit after noticing that it was the same as an object observed six years ago. Using both sets of observations, the future motion of this asteroid was carried further forward in time using the automatic computations made by the Sentry system at NASA's Near-Earth Object Program Office at the Jet Propulsion Laboratory. These computations rule out this object as an impact threat to Earth (or any other planet) for at least the next 150 years.

Any statements about risk for impact of discovered asteroids and comets should be verified by scientists and the media by accessing NASA' Near Earth Object (NEO) Program web site at
http://neo.jpl.nasa.gov/risk/
or the European equivalent, the NEO Dynamic Site at
http://newton.dm.unipi.it/neodys/index.php?pc=4.1 .
Tags: science
Reposted byastronomygroupscience
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