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Now showing items 17744-17763 of 24108
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Proton capture cross section of Sr isotopes
(2001-05-21)The (p,gamma) cross section of Sr-84,Sr-86,Sr-87 isotopes has been measured using activation technique in the proton energy range between 1.5 and 3 MeV. These reactions are relevant to the p-process of stellar nucleosynthesis ... -
Proton capture cross section of Sr isotopes and their importance for nucleosynthesis of proton-rich nuclides
(2001-12)The (p,gamma) cross sections of three stable Sr isotopes haven been measured in the astrophysically relevant energy range. These reactions are important for the p process in stellar nucleosynthesis and, in addition, the ... -
Proton capture cross sections of the ruthenium isotopes
(1998-07)The proton capture cross sections of the stable ruthenium isotopes 96, 98, 99, and 104 have been measured by means of the activation method in the proton energy range between 1.5 and 3 MeV. Thin layers of natural ruthenium ... -
Proton capture cross-section of Cd-106,Cd-108 for the astrophysical p-process
(2007-05)The proton capture cross-sections of the two most proton-rich, stable isotopes of cadmium have been measured for the first time in the energy range relevant to the astrophysical p-process between E-p = 2.4 and 4.7 MeV. The ... -
Proton induced reaction cross section measurements on Se isotopes for the astrophysical p process
(2003-11)As a continuation of a systematic study of reactions relevant to the astrophysical p process, the cross sections of the Se-74,Se-76(p,gamma) Br-75,Br-77 and Se-82(p,n) Br-82 reactions have been measured at energies from ... -
Proton-rich nucleosynthesis and nuclear physics
(American Institute of Physics (AIP), 2012)Although the detailed conditions for explosive nucleosynthesis are derived from astrophysical modeling, nuclear physics determines fundamental patterns in abundance yields, not only for equilibrium processes. Focussing on ... -
Proton/Hydrogen Transfer Affects the S-State-Dependent Microsecond Phases of P680+ Reduction during Water Splitting
(1998)To investigate a possible coupling between P680+ reduction and hydrogen transfer, we studied the effects of H2O/D2O exchange on the P680+ reduction kinetics in the nano- and microsecond domains. We concentrated on studying ... -
Protoplanetary disc evolution affected by star-disc interactions in young stellar clusters
(2014-07-01)Most stars form in a clustered environment. Therefore, it is important to assess how this environment influences the evolution of protoplanetary discs around young stars. In turn, this affects their ability to produce ... -
The protoplanetary disks in the nearby massive star forming region Cygnus OB2
(2013-08)The formation of stars in massive clusters is one of the main modes of the star formation process. However, the study of massive star forming regions is hampered by their typically large distances to the Sun. One exception ... -
Prototractatus
(Routledge, 1996) -
Prototype H-ASEF System : Hardened Automated Sample Extraction from Filters
(UH MEMS, 2017-03-29)The Hardened Automated Sample Extraction from Filters (H-ASEF) unit is a redevelopment of the previously design ASEF platform to allow for more robust and extensive performance testing. The H-ASEF platform is concerned ... -
A prototype personal aerosol sampler based on electrostatic precipitation and electrowetting-on-dielectric actuation of droplets
(2016-05-01)An electrostatic precipitator (ESP) based personal sampler with a laboratory based electrowetting-on-dielectric (EWOD) concentrator could provide a high concentration rate personal aerosol sampler system. A prototype system ... -
Prototyping real time engineering systems using Hatley & Pirbhai's requirement model
(University of Hertfordshire, 1992)A research programme is underway which is aimed at establishing ways of prototyping real time engineering systems using existing concurrent programming systems. The role of formal techniques in the development of prototypes, ... -
Prototyping Realistic Long-Term Human-Robot Interaction for the Study of Agent Migration
(2016-08-26)This paper examines participants’ experiences of interacting with a robotic companion (agent) that has the ability to move its “mind” between different robotic embodiments to take advantage of the features and functionalities ... -
Providing blind people with access to technical diagrams
(IOS Press, 2003) -
Providing interactive access to architectural floorplans for blind people
(2006-01)The TeDUB system is a new method for providing access to graphic information for blind people, using synthetic speech, sounds and forcefeedback information from a joystick. Currently certain types of visual diagram, such ... -
Providing public access to information in complex and weakly structures domains: a 3-layered model for hypermedia information systems
(University of Hertfordshire, 1995)Advice systems are defined as information systems which present users with both information and more subjective expert advice about complex and weakly structures domains. This paper presents a Generic Advice System ... -
Providing the evidence base for environmental risk assessments of novel farm management practices
(2008-11)An environmental risk assessment of a new agricultural management practice depends upon the provision of empirical evidence of cause and effect. This will invariably be derived from comparative experiments testing the null ...