Center-of-mass effects on the quasi-hole spectroscopic factors in the 16O(e,e'p) reaction

The spectroscopic factors for the low-lying quasi-hole states observed in the 16O(e,e'p)15N reaction are reinvestigated with a variational Monte Carlo calculation for the structure of the initial and final nucleus. A computational error in a previous report is rectified. It is shown that a proper treatment of center-of-mass motion does not lead to a reduction of the spectroscopic factor for $p$-shell quasi-hole states, but rather to a 7% enhancement. This is in agreement with analytical results obtained in the harmonic oscillator model. The center-of-mass effect worsens the discrepancy between present theoretical models and the experimentally observed single-particle strength. We discuss the present status of this problem, including some other mechanisms that may be relevant in this respect.Comment: 14 pages, no figures, uses Revtex, to be published in Phys. Rev. C 58 (1998

Сербська книжка ХІХ століття у Львівській науковій бібліотеці ім. В. Стефаника (за матеріалами фонду відділу рідкісної книги)

UBUlink(opens in a new window)|Entitled full text(opens in a new window)|View at Publisher(opens in a new window)| In recent years the number and frequency of high-impact floods have increased and climate change effects are expected to increase flood risks even more. The European Union (EU) has recently established the Floods Directive as a framework for the assessment and management of these risks. The aim of this article is to explore factors that have hampered or stimulated the implementation process of the Floods Directive in the Netherlands, from its establishment in 2007 until January 2013. During this period, the first requirements of the Floods Directive had to be implemented, while the second and third obligations were to be in an advanced stage. Following a literature review of policy implementation theories and a content analysis of the Floods Directive, we have studied the implementation processes in the Dutch part of the Meuse and Rhine-West catchments. Perceptions of interviewees and survey respondents were used to identify influential factors. Our research shows that although the implementation process in the Netherlands is on schedule, it is iterative and complex. Various constraining and stimulating factors, affecting the implementation process, are distinguished. The article concludes with some suggestions for improving the further implementation of the Floods Directive

Перлина дерев’яного зодчества та її рятівники

Церкву Різдва Пресвятої Богородиці жителі Тулинець здавна звели на вершині одного з пагорбів. Вони хотіли, щоб їхня святиня сягала неба. І сьогодні вона виринає, немов диво перед зором проїжджаючого селом у напрямку до Дніпра

Recurrent governance challenges in the implementation and alignment of flood risk management strategies: a review

In Europe increasing flood risks challenge societies to diversify their Flood Risk Management Strategies (FRMSs). Such a diversification implies that actors not only focus on flood defence, but also and simultaneously on flood risk prevention, mitigation, preparation and recovery. There is much literature on the implementation of specific strategies and measures as well as on flood risk governance more generally. What is lacking, though, is a clear overview of the complex set of governance challenges which may result from a diversification and alignment of FRM strategies. This paper aims to address this knowledge gap. It elaborates on potential processes and mechanisms for coordinating the activities and capacities of actors that are involved on different levels and in different sectors of flood risk governance, both concerning the implementation of individual strategies and the coordination of the overall set of strategies. It identifies eight overall coordination mechanisms that have proven to be useful in this respect

Recurrent Governance Challenges in the Implementation and Alignment of Flood Risk Management Strategies: a Review

In Europe increasing flood risks challenge societies to diversify their Flood Risk Management Strategies (FRMSs). Such a diversification implies that actors not only focus on flood defence, but also and simultaneously on flood risk prevention, mitigation, preparation and recovery. There is much literature on the implementation of specific strategies and measures as well as on flood risk governance more generally. What is lacking, though, is a clear overview of the complex set of governance challenges which may result from a diversification and alignment of FRM strategies. This paper aims to address this knowledge gap. It elaborates on potential processes and mechanisms for coordinating the activities and capacities of actors that are involved on different levels and in different sectors of flood risk governance, both concerning the implementation of individual strategies and the coordination of the overall set of strategies. It identifies eight overall coordination mechanisms that have proven to be useful in this respect

Синтез и антиинфекционное протективное действие β-циклогексилметил- и β-2-циклогексилэтилгликозидов мурамоилдипептида

Осуществлен синтез β-циклогексилметил- и β-2-циклогексилэтилгликозидов мурамоилдипептида. Исходные перацетилированные β-циклогексилалкилглюкозаминиды были получены оксазолиновым методом. Установлено, что β-циклогексилметил- и β-(2-циклогексилэтил)-МДП обладают высоким антиинфекционным протективным эффектом при поражении мышей летальной дозой Staphylococcus aureus.Здійснено синтез β-циклогексилметил- і β-2-циклогексилетил глікозиді в мурамоїлдипептиду. Вихідні перацетильовані (β-циклогексилалкілглюкозамініди були отримані за оксазоліновим методом. Встановлено, що β-циклогексилметил- і β-(2-циклогексилетил)-МДП володіють високим антиінфекційним протективним ефектом при поразці мишей летальною дозою Staphylococcus aureus.The synthesis of β-cyclohexylmethyl- and β-2-cyclohexylethylglycosides of muramyldipeptide has been carried out. The starting peracetates of β-cyclohexylalkylglucosaminides have been obtained by the oxazoline method. It been found that β-cyclohexylmethyl- and β-(2-cyclohexylethyl)-MDP have a high anti-infection protective effect against the lethal dose of Staphylococcus aureus in mice

Nuclear symmetry energy effects on neutron stars properties

We construct a class of nuclear equations of state based on a schematic potential model, that originates from the work of Prakash et. al. \cite{Prakash-88}, which reproduce the results of most microscopic calculations. The equations of state are used as input for solving the Tolman-Oppenheimer-Volkov equations for corresponding neutron stars. The potential part contribution of the symmetry energy to the total energy is parameterized in a generalized form both for low and high values of the baryon density. Special attention is devoted to the construction of the symmetry energy in order to reproduce the results of most microscopic calculations of dense nuclear matter. The obtained nuclear equations of state are applied for the systematic study of the global properties of a neutron star (masses, radii and composition). The calculated masses and radii of the neutron stars are plotted as a function of the potential part parameters of the symmetry energy. A linear relation between these parameters, the radius and the maximum mass of the neutron star is obtained. In addition, a linear relation between the radius and the derivative of the symmetry energy near the saturation density is found. We also address on the problem of the existence of correlation between the pressure near the saturation density and the radius.Comment: 17 pages, 25 figure