Search results for "COI"
showing 10 items of 1683 documents
Exclusive measurement of quasi-free η-photoproduction from deuterium
2003
Quasi-free photoproduction of eta-mesons from the deuteron has been measured at the tagged photon facility of the Mainz microtron MAMI with the photon spectrometer TAPS for incident photon energies from the production threshold at 630 MeV up to 820 MeV. In a fully exclusive measurement eta-mesons and recoil nucleons were detected in coincidence. At incident photon energies above the production threshold on the free nucleon, where final state interaction effects are negligible, an almost constant ratio of sigma(n)/sigma(p)=0.66+/-0.10 was found. At lower incident photon energies the ratio rises due to re-scattering effects. The average ratio agrees with the value extracted from a comparison …
Threshold Effects in the U.S. Budget Deficit. ECONOMIC INQUIRY
2004
We contribute to the debate on whether the U.S. large federal budget deficits are sustainable in the long run. We model the U.S. government deficit per capita as a threshold autoregressive process. We find evidence that the U.S. budget deficit is sustainable in the long run and that economic policy makers will only intervene to reduce per capita deficit when it reaches a certain threshold.
The ion-optical design of the MARA recoil separator and absolute transmission measurements of the RITU gas-filled recoil separator
2011
In this thesis work, the use of two complementary recoil separators for studies of nuclear structure via fusion-evaporation reactions are discussed. The design and the main ion-optical properties of the vacuum-mode recoil-mass separator MARA, intended for studies of nuclei with N Z close to the proton drip-line, are presented. MARA (Mass Analysing Recoil Apparatus) consists of a magnetic quadrupole triplet followed by an electrostatic de ector and a magnetic dipole. The working principle of MARA is discussed and the reasons for the choice of the optical parameters of the elements are given. The performance of MARA for di erent kind of fusion reactions has been studied with Monte Carlo simul…
Discovery of the new isotopes ²⁴⁰Es and ²³⁶Bk and in-beam spectroscopic studies of ²⁴⁴Cf
2017
The hitherto unknown neutron-deficient nuclei 240Es and 236Bk were synthesised using the fusion-evaporation reaction 209Bi(34S,3n)240Es. The ritu gas-filled recoil separator and the great spectrometer were used in this decay spectroscopic study. The measured electron-capture delayed fission (ECDF) branches in both of the new isotopes complement the experimental data available in the heavier odd-odd Es and Bk isotopes. Furthermore, the ECDF branches show a continuation in the exponential increase of the ECDF probabilities as a function of QEC − Bsf when approaching the proton dripline. In addition, an in-beam γ-ray spectroscopic study of the neutron-deficient isotope 244Cf was made using the fus…
Detailed spectroscopy of the neutron-deficient bismuth isotopes ¹⁹³,¹⁹⁵Bi
2015
Two experiments aiming to study the shape coexistence and competing structures in 193Bi and 195Bi isotopes have been performed at the Accelerator laboratory of the University of Jyv askyl a, Finland (JYFL). Many new states have been found, hugely extending the previously known level schemes for both isotopes. The i13=2 bands were extended up to I = 45/2+ in both the 193;195Bi isotopes. In case of 193Bi, the I = 31/2+ member of the i13=2 band was found to de-excite also to a long-lived isomeric state. This link determines the energy of the isomeric state to be 2350(1) keV and suggests a spin and parity of 29/2+. The half-life of the isomeric state was measured to be 85(3) s. A level structur…
Kriptovalūtas kā noziedzīga nodarījuma instruments, to tiesiskais regulējums un problemātika
2018
Jebkuras veiksmīgas valūtas pamatfunkcijas ir maksājumu nodrošināšana, kalpošana par uzskaites un uzkrāšanas vienību. Šī ir fundamentāla naudas pastāvēšanas teorija. Virtuālās valūtas pastāvēšana ir balstīta uz decentralizētu datortīklu. Virtuālās valūtas emisiju un darījumus ar virtuālo valūtu neuzrauga ne centrālā banka, ne kāda institūcija vai komercbanka – tiek uzskatīts, ka virtuālā valūta “sevi regulē pati”. Kriptovalūtas regulējuma trūkums un anonimitātes iespējamības rada būtiskus riskus noziedzīga nodarījuma izdarīšanai, izmantojot virtuālo valūtu kā noziedzīga nodarījuma instrumentu, kas var apdraudēt valsts un sabiedrības intereses. Autors šajā darbā pēta virtuālās valūtas (kript…
The parasitoid species complex associated with sexual and parthenogenetic Naryciinae (Lepidoptera: Psychidae): Integrating ecological and molecular a…
2011
This study describes the parasitoid species complex associated with seven closely related species of sexual (Siederia rupicollella, S. listerella, Dahlica lazuri, D. charlottae and D. lichenella) and parthenogenetic (Dahlica fennicella and D. triquetrella) Naryciinae (Lepidoptera: Psychidae) in Central Finland. A thorough ecological analysis of all the species of parasitoids recorded was combined with analyses of molecular data. Mitochondrial and nuclear DNA data were obtained from all the species in order to (1) detect cryptic species associated with host specialization, (2) assign undescribed males to females, and (3) verify the morphological identification of closely related species. A D…
Regulacje prawne drugiej dekady XXI wieku - dokąd zmierzamy? Czy zastąpi nas inżynieria prawa?
2019
Animacja społeczno-kulturalna w działaniu. Refleksja praktyka z perspektywy ćwierćwiecza
2019
Artykuł omawia cywilizacyjny kontekst powstania animacji społeczno-kulturalnej i jej dawne uwarunkowania, wskazując na rozwój jej zadań i funkcji. Animacja to dziejąca się zmiana w grupach i społecznościach lokalnych, będąca nerwem demokracji i społeczeństwa obywatelskiego. Artykuł kończy uzasadnienie jej potrzeby w skomplikowanej sytuacji funkcjonowania człowieka w zglobalizowanym świecie.
Are zinc-bound metallothionein isoforms (I+II and III) involved in impaired thymulin production and thymic involution during ageing?
2004
Abstract Background With advancing age, thymic efficiency shows progressive decline due to thymic involution allowing impaired cell-mediated immunity and the appearance of age-related diseases. The intrinsic cause of thymic involution is still undefined. Chronic inflammation and high glucocorticoids (GCs) may be involved. However, transgenic mice, with increased GC sensitivity and over expression of GC receptors, display delayed age-associated thymic involution. This fact suggests that other substances may affect thymic involution. Among them, both isoforms of metallothioneins (MTs) I+II and III are the major candidates because their increments leads to organ atrophy in constant stress and …