The experimental-methodical geophysical studies in the RV POSEIDON cruise 405

The main results of experimental and methodological geophysical studies in the 405th cruise of the NIS "Poseidon" from 8 to 22 December 2010 in the northwestern part of the Black Sea are presented. The purpose of the POS-405 cruise is the testing of new geophysical equipment developed within the framework of the SUGAR target project. The new multi-beam sounder SBE 3050 Multibeam company ELAC Nautik was installed on the NIS "Poseidon" during the last stay of the ship in dry dock. The sounder is able to record the water column and display gas bubbles on the display screen using the image viewer (WCI). In comparison with the bathymetric map of the canyon, the Danube test gave a positive result. For the first time, a new deep-seated, towed multichannel streamer was deployed. With the help of a deep-water winch, the first seismic signals were completed and recorded. After replacing the members of the scientific crew, a new electromagnetic system with a controlled source (CSEM) was tested. For the first time a 1000 m long receiver was towed. Due to weather conditions (wind of more than 25 m / s), the Poseidon VAT 3.5 days out of 15 workers was in a storm situation. These limitations prevented intensive tests of towed instruments. By agreement with the Institute of Geophysics of the National Academy of Sciences of Ukraine, electromagnetic research was conducted for 15 days using an innovative method for analyzing spontaneous electromagnetic radiation (ASEMI)

The experimental-methodical geophysical studies in the RV POSEIDON cruise 405

Наведено основні результати експериментально-методичних геофізичних досліджень у 405-му рейсі НДС “Посейдон” з 8 по 22 грудня 2010 р. у північно-західній частині Чорного моря. Мета круїзу POS-405 — дослідження нового геофізичного обладнання, розробленного в межах цільового проекту “SUGAR”. Нову систему багатопроменевого ехолоту SBE 3050 Multibeam компанії ELAC Nautik було встановлено на НДС “Посейдон” під час останньої стоянки корабля в сухому доці. Ехолот здатний записувати водну товщу та відображувати газові бульбашки на екрані дисплея за допомогою переглядача зображень (WCI). У ході зіставлення з батиметричною картою каньйону Дунаю тестування дало позитивний результат. Вперше було розгорнуто новий глибинний буксируваний багатоканальний стример. За допомогою глибоководної лебідки були завершені і записані перші сейсмічні сигнали. Після заміни членів наукового екіпажу було випробувано нову електромагнітну систему з контрольованим джерелом (CSEM). Вперше буксировано приймач завдовжки 1000 м. У зв’язку з погодними умовами (вітер силою понад 25 м/с) НДС “Посейдон” 3,5 дні з 15 робочих перебував у штормовому положенні. Ці обмеження не дали змоги провести інтенсивні випробування буксированих приладів. За домовленістю з Інститутом геофізики НАН України протягом 15 днів було проведено електромагнітні дослідження за інноваційним методом аналізу спонтанного електромагнітного випромінювання (АСЕМВ).Представлены основные результаты экспериментально-методических геофизических исследований в 405-м рейсе НИС "Посейдон" с 8 по 22 декабря 2010 г. в северо-западной части Черного моря. Цель круиза POS-405 - испытание новой геофизической аппаратуры, разработанной в рамках целевого проекта "SUGAR". Новая система многолучевого эхолота SBE 3050 Multibeam компании ELAC Nautik была установлена на НИС "Посейдон" во время последней стоянки корабля в сухом доке. Эхолот способен записывать водную толщу и отображать газовые пузырьки на экране дисплея с помощью программы просмотра изображений (WCI). В ходе сопоставления с батиметрической картой каньона Дуная тестирование дало положительный результат. Впервые был развернут новый глубинный буксированный многоканальный стример. С помощью глубоководной лебедки были завершены и записаны первые сейсмические сигналы. После замены членов научного экипажа была испытана новая электромагнитная система с контролируемым источником (CSEM). Впервые буксировался приемник длиной 1000 м. В связи с погодными условиями (ветер силой свыше 25 м/с) НДС "Посейдон" 3,5 дня из 15 рабочих находился в штормовом положении. Эти ограничения не дали возможности провести интенсивные испытания буксированных приборов. По договоренности с Институтом геофизики НАН Украины на протяжении 15 дней проводились электромагнитные исследования с помощью инновационного метода анализа спонтанного электромагнитного излучения (АСЭМИ)

Lifetime determination of excited states in Cd-106

Two separate experiments using the Differential Decay Curve Method have been performed to extract mean lifetimes of excited states in 106 Cd. The inedium-spin states of interest were populated by the Mo-98(C-12, 4n) Cd-106 reaction performed at the Wright Nuclear Structure Lab., Yale University. From this experiment, two isomeric state mean lifetimes have been deduced. The low-lying states were populated by the Mo-96(C-13, 3n)Cd-106 reaction performed at the Institut fur Kernphysik, Universitat zu Koln. The mean lifetime of the I-pi = 2(1)(+) state was deduced, tentatively, as 16.4(9) ps. This value differs from the previously accepted literature value from Coulomb excitation of 10.43(9) ps

Longitudinal dopamine D2 receptor changes and cerebrovascular health in aging

BACKGROUND AND OBJECTIVES: Cross-sectional studies suggest marked dopamine (DA) decline in aging, but longitudinal evidence is lacking. The aim of this study was to estimate within-person decline rates for DA D2-like receptors (DRD2) in aging and examine factors that may contribute to individual differences in DRD2 decline rates. METHODS: We investigated 5-year within-person changes in DRD2 availability in a sample of older adults. At both occasions, PET with 11C-raclopride and MRI were used to measure DRD2 availability in conjunction with structural and vascular brain integrity. RESULTS: Longitudinal analyses of the sample (baseline: n = 181, ages: 64-68 years, 100 men and 81 women; 5-year follow-up: n = 129, 69 men and 60 women) revealed aging-related striatal and extrastriatal DRD2 decline, along with marked individual differences in rates of change. Notably, the magnitude of striatal DRD2 decline was ∼50% of past cross-sectional estimates, suggesting that the DRD2 decline rate has been overestimated in past cross-sectional studies. Significant DRD2 reductions were also observed in select extrastriatal regions, including hippocampus, orbitofrontal cortex (OFC), and anterior cingulate cortex (ACC). Distinct profiles of correlated DRD2 changes were found across several associative regions (ACC, dorsal striatum, and hippocampus) and in the reward circuit (nucleus accumbens and OFC). DRD2 losses in associative regions were associated with white matter lesion progression, whereas DRD2 losses in limbic regions were related to reduced cortical perfusion. DISCUSSION: These findings provide the first longitudinal evidence for individual and region-specific differences of DRD2 decline in older age and support the hypothesis that cerebrovascular factors are linked to age-related dopaminergic decline

ADRIA LITHOSPHERE INVESTIGATION ALPHA - Cruise No. M86/3, January 20 - February 04, 2012, Brindisi (Italy) - Dubrovnik (Croatia)

The Adriatic Sea and underlying lithosphere remains the least investigated part of the Mediterranean Sea. To shed light on the plate tectonic setting in this central part of southern Europe, R/V METEOR cruise M86/3 set out to acquire deep penetrating seismic data in the Adriatic Sea. M86/3 formed the core of an amphibious investigation crossing Adria from the Italian Peninsula into Montenegro/Albania. A total of 111 OBS/OBH deployments were successfully carried out, in addition to 47 landstations both in Italy and Montenegro/Albania, which recorded the offshore airgun shots. In the scope of this shoreline-crossing study, the aim is to quantify the shallow geometry, deep boundaries and the architecture of the southern Adriatic crust and lithosphere and to provide insights on a possible decoupling zone between the northern and southern Adriatic domains. Investigating the structure of the Adriatic crust and lithospheric mantle and analyzing the tectonic activity are essential for understanding the mountain-building processes that underlie the neotectonics and earthquake hazard of the Periadriatic region, especially in the vicinity of local decoupling zones

Intruder negative-parity states of neutron-rich Si33

Yrast states in the neutron-rich 1433Si19 nucleus have been studied using binary grazing reactions produced by the interaction of a 215-MeV beam of S36 ions with a thin Pb208 target. An experimental setup that combines the large-acceptance magnetic spectrometer PRISMA and the high-efficiency γ-ray detection array CLARA was used in the experiment. Four new γ-ray photopeaks at energies of 971, 1724, 1772, and 2655 keV were observed and assigned to the Si33 level scheme. The experimental level scheme is compared with the results of 1ω p-sd-pf large-scale shell-model calculations using the recently developed PSDPFB effective interaction; good agreement is obtained. The structure of the populated states of Si33 is discussed within the context of an odd neutron coupled to states of the Si32 core. © 2010 The American Physical Society.This work was supported in part by the EPSRC (UK) and by the European Union under Contract No. RII3-CT-2004-506065. Five of us (D.O., M.B., A.H., K.K., and A.P.)acknowledge financial support from the EPSRC. Z.M.W acknowledges support from ORSAS and from the University of the West of Scotland. A.J. acknowledges financial supportfrom the Spanish Ministerio de Ciencia e Innovación under Contract Nos. FPA2007-66069 and FPA2009-13377-C02-02. Zs.D. acknowledges the financial support from OTKA Project No. K68801.Peer Reviewe

First in-beam γ -ray study of the level structure of neutron-rich S 39

International audienceThe neutron-rich S39 nucleus has been studied using binary grazing reactions produced by the interaction of a 215-MeV beam of S36 ions with a thin Pb208 target. The magnetic spectrometer, PRISMA, and the γ-ray array, CLARA, were used in the measurements. Gamma-ray transitions of the following energies were observed: 339, 398, 466, 705, 1517, 1656, and 1724 keV. Five of the observed transitions have been tentatively assigned to the decay of excited states with spins up to (11/2−). The results of a state-of-the-art shell-model calculation of the level scheme of S39 using the SDPF-U effective interaction are also presented. The systematic behavior of the excitation energy of the first 11/2− states in the odd-A isotopes of sulfur and argon is discussed in relation to the excitation energy of the first excited 2+ states of the adjacent even-A isotopes. The states of S39 that have the components in their wave functions corresponding to three neutrons in the 1f7/2 orbital outside the N=20 core have also been discussed within the context of the 0 ℏω shell-model calculations presented here