Scientists have been trying to confirm the existence of gravitational waves for fifty years. Then, in September 2015, came a "very interesting event" (as the cautious subject line in a physicist's ...email read) that proved to be the first detection of gravitational waves. InGravity's Kiss,Harry Collins -- who has been watching the science of gravitational wave detection for forty-three of those fifty years and has written three previous books about it -- offers a final, fascinating account, written in real time, of the unfolding of one of the most remarkable scientific discoveries ever made. Predicted by Einstein in his theory of general relativity, gravitational waves carry energy from the collision or explosion of stars. Dying binary stars, for example, rotate faster and faster around each other until they merge, emitting a burst of gravitational waves. It is only with the development of extraordinarily sensitive, highly sophisticated detectors that physicists can now confirm Einstein's prediction. This is the story that Collins tells.Collins, a sociologist of science who has been embedded in the gravitational wave community since 1972, traces the detection, the analysis, the confirmation, and the public presentation and the reception of the discovery -- from the first email to the final published paper and the response of professionals and the public. Collins shows that science today is collaborative, far-flung (with the physical location of the participants hardly mattering), and sometimes secretive, but still one of the few institutions that has integrity built into it.
Letters between Cristoforo Sorte and Cavalier Signor Bartolomeo Vitali about paintings are presented. They talk about how Sorte imitates everything of nature and art with vivid and appropriate ...colors, painting on paper, and the method of painting a secco.
Celotno besedilo
Dostopno za:
DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
33.
Black Germany Aitken, Robbie; Rosenhaft, Eve
09/2013
eBook
This groundbreaking history traces the development of Germany's black community, from its origins in colonial Africa to its decimation by the Nazis during World War II. Robbie Aitken and Eve ...Rosenhaft follow the careers of Africans arriving from the colonies, examining why and where they settled, their working lives and their political activities, and giving unprecedented attention to gender, sexuality and the challenges of 'mixed marriage'. Addressing the networks through which individuals constituted community, Aitken and Rosenhaft explore the ways in which these relationships spread beyond ties of kinship and birthplace to constitute communities as 'black'. The study also follows a number of its protagonists to France and back to Africa, providing new insights into the roots of Francophone black consciousness and postcolonial memory. Including an in-depth account of the impact of Nazism and its aftermath, this book offers a fresh critical perspective on narratives of 'race' in German history.
Razvoj enzimske aktivnosti zrna ječma tijekom procesa slađenja je jedno od ključnih zbivanja kojom se osigurava zadovoljavajuća tehnološka kvaliteta slada. Brojna istraživanja su provedena na ovu ...temu kojima je ustanovljeno da se najbolji rezultati vezani za razvoj enzimskog potencijala zrna osiguravaju slađenjem namjenskih, jarih, dvoredih pivarskih sorti uz odgovarajući režim slađenja kojim se osiguravaju procesni uvjeti koji pogoduju aktiviranju već u zrnu prisutnih i/ili de novo sintezi enzima. Cilj ovog istraživanja bilo je ustanoviti kako s obzirom na gore postavljene zahtjeve reagiraju različite namjenske, dvorede, jare i ozime sorte ječma koje se uobičajeno koriste za proizvodnju slada u Hrvatskoj. Temeljem dobivenih rezultata ustanovljeno je aktivnost α-amilaze u svim ispitivanim sortama bila je unutar, dok je aktivnost β-amilaze u sve tri sorte bila je viša od standardnih vrjednosti za svijetli slad. Oba enzima su pokazala najvišu aktivnost zadnjeg, četvrtog dana klijanja. Proces sušenja slada značajno više smanjuje aktivnost β-amilaze (25-30%) nego α-amilaze (oko 10%). Utvrđivani su i ostali pokazatelji kvalitete polaznih ječmova, procesa mikroslađenja i gotovih sladova. Ustanovljeno je da sve tri sorte daju svijetli pivarski slad vrlo dobre kvalitete. Neki pokazatelji kvalitete slada poput topljivog dušika u sladovini i viskoznosti su imali izvrsne vrijednosti, najproblematičniji pokazatelj je bila fiabilnost. Međutim, kako je friabilnost kumulativni pokazetelj na koji utječu brojni pojedinačni faktori ovo zahtijeva dodatna istraživanja.
The development of enzymatic activity of barley grains during the malting process is one of the key developments which ensures satisfactory technological quality of malt. Numerous studies have been conducted on this topic, which found that the best results related to the development of enzymatic potential of grain are a result of malting purpose, spring, two-row brewing varieties. The application of appropriate malting regime that ensures process conditions favaurable for te activation of already present in the grain and/or de novo synthesis enzymes are also an important factor. The aim of this research
was to establish how different purpose, two - row, spring and winter varieties of barley, which are commonly used for malt production in Croatia, react to the above requirements. Based on the obtained results,
the α-amylase activity in all examined cultivars was found to be within
the standard values, while the β-amylase activity in all three cultivars was higher than the standard values for light malt. Both enzymes showed the highest activity on the last, fourth day of germination. The malt drying process significantly reduced β-amylase activity (25- 30%), in comparison to the activity of α-amylase (about 10%). Other indicators of the quality of starting barley, micromalting process and finished malts were also determined. It was found that all three varieties give light malt approprite for malting, reulting with malt of very good quality. Some malt quality indicators such as soluble nitrogen in wort and viscosity had excellent values, and the most problematic indicator was fiability. However, as friability is a cumulative indicator affected by a number of individual factors this requires further research.
http://dx.doi.org/10.5007/1808-1711.2016v20n2p179 Duncan Pritchard has suggested that anti-luck epistemology and virtue epistemology are the best options to solve the Gettier problem. Nonetheless, ...there are challenging problems for both of them in the literature. Pritchard holds that his anti-luck virtue epistemology puts together the correct intuitions from both anti-luck epistemology and virtue epistemology and avoids their problems. Contra Pritchard, we believe that there is already a satisfactory theory on offer, namely, the defeasibility theory of knowledge. In this essay we intend (i) to examine Pritchard’s anti-luck virtue epistemology, and (ii) to defend the defeasibility theory of knowledge as an alternative to Pritchard’s theory. We will provide the reader with reasons for believing that the defeasibility theory is better than Pritchard’s theory because the former is more economic and more ecumenical than the latter, since it goes without non-epistemic notions and remains neutral as for the internalism vs. externalism debate.
Black holes are one of the most remarkable predictions of Einstein's general relativity. In recent years, ideas in brane-world cosmology, string theory and gauge/gravity duality have motivated ...studies of black holes in more than four dimensions, with surprising results. In higher dimensions, black holes exist with exotic shapes and unusual dynamics. Edited by leading expert Gary Horowitz, this exciting book is the first devoted to this new field. The major discoveries are explained by the people who made them: Rob Myers describes the Myers–Perry solutions that represent rotating black holes in higher dimensions; Ruth Gregory describes the Gregory–Laflamme instability of black strings; and Juan Maldacena introduces gauge/gravity duality, the remarkable correspondence that relates a gravitational theory to nongravitational physics. Accessible to anyone with a standard course in general relativity, this is an important resource for graduate students and researchers in general relativity, string theory and high energy physics.
The purpose of this contribution is to give an etymology to two Occitan words regarded as of unknown origin by the FEW. Velay
‘a kind of thrush’ is a regular issue of Old Occitan
‘of Provence’. The ...nasalized form
is a phono-stylistic and zoolectal variant of
Red clover is a perennial forage crop rich in isoflavones, the bioactive compounds with a positive effect on human and animal health. The aim of the research was to determine a variation in the ...isoflavone contents in the Croatian red clover collection and to identify the most promising materials to be used in the breeding program for the development of new cultivars for specific purposes. Leaf samples of 29 red clover cultivars/populations (two cultivars, twenty breeding populations, and seven local populations) were collected in a full flowering stage, and the identification and quantification of isoflavones was performed using the HPLC analysis. The most common isoflavones in the red clover cultivars/populations were formononetin and biochanin A. A significant variation among the cultivars/populations in the total and individual isoflavone content was determined. The populations with very high and low contents of both the total and of the individual isoflavones were identified to be used for the breeding purposes in order to develop new forage cultivars, or for specific goals in the pharmaceutical industry.
Crvena djetelina višegodišnja je krmna kultura bogata izoflavonima, bioaktivnim spojevima s pozitivnim utjecajem na zdravlje ljudi i životinja. Cilj istraživanja bio je utvrditi varijabilnost sadržaja izoflavona hrvatske kolekcije crvene djeteline te identificirati najzanimljivije materijale koji će se koristiti u oplemenjivačkome programu za razvoj novih sorata za specifične namjene. Uzorci lista prikupljeni su u stadiju pune cvatnje iz 29 sorata/populacija crvene djeteline (dvije sorte, dvadeset oplemenjivačkih populacija, sedam lokalnih populacija), a identifikacija i kvantifikacija izoflavona obavljena je pomoću HPLC analize. Najzastupljeniji izoflavoni u sortama/populacijama crvene djeteline bili su formononetin i biohanin A. Utvrđena je značajna varijabilnost među sortama/populacijama u sadržaju ukupnih i individualnih izoflavona. Identificirane su populacije s vrlo visokim i niskim sadržajem kako ukupnih, tako i pojedinačnih izoflavona koje će se koristiti u oplemenjivačke svrhe za razvoj novih krmnih kultivara ili za specifične namjene u farmaceutskoj industriji.
Istraživanje vegetativne razvijenosti i rodnosti sorti lijeske provedena su u dva pokusan voćnjaka u Istri. U prvom pokusnom voćnjaku istraživanja su obuhvatila sorte: Fertile de Coutard, Cosford, ...Gunslebert, Istarski duguljasti, Merveille de Bollwiller, Magonca i Tonda Gentile Romana na podlozi Corylus colurna, a uzgojene u obliku stabla s krošnjom u obliku vaze. Razmak sadnje je 5 x 5 m (400 stabala/ha). Sve su sorte postigle dobru vegetativnu razvijenost na kraju 6. vegetacije. Veću bujnost od ostalih 6 sorti, postigla je sorta Fertile de Coutard. Razlika je visoko signifikantna. Podjednaku vegetativnu razvijenost postigle su ostalih 6 sorti. Najveći prirod postigla je sorta Cosford, a slijede je Fertile de Coutard, Istarski duguljasti, Tonda Romana, Magonca i Gunslebert, a najmanji sorta Merveille de Bollwiller. U drugom pokusnom voćnjaku, istraživana je vegetativna razvijenost i rodnost sorti: Istarski duguljasti, Tonda Gentile Romana i Fertile de Coutard uzgojene na vlastitom korijenu u obliku grmolike vaze s razmakom 4,5 x 4,5 m (493 stabla/ha). Na kraju 6. vegetacije sve su sorte postigle dobru razvijenost. Veću bujnost od sorte Istarski duguljasti postigle su sorte Fertile de Coutard i Tonda Gentile Romana. Podjednak prirod utvrđen je za sorte na vlastitom korijenu. Usporedbom vegetativne razvijenosti stabala na vlastitom korijenu i podlozi Corylus colurna utvrđeno je da su sve tri sorte na podlozi Corylus colurna postigle znatno veću bujnost. Usporedbom rodnosti sorti Istarski duguljasti, Tonda Romana i Fertile de Coutard na vlastitom korijenu i istih sorti na podlozi Corylus colurna ustanovljeno je da su sve 3 sorte dale znatno veći prirod na podlozi Corylus colurna. Istraživanja su obuhvatila utjecaj podloge na kemijski sastav lišća sorti: Fertile de Coutard, Istarski duguljasti i Tonda Gentile Romana. Provedena je analiza uzroka prijevremenog opadanja plodova.
Malcolm X: From Political Eschatology to Religious Revolutionary offers a variety of historical, religious and philosophical perspectives into the significance of Malcolm X's life and thought today.
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