215 research outputs found
Flammability Tests on Hot Surface for Several Hydraulic Fluids
Industrial equipment using hydraulic fluids are design to accept higher load and speed, implicitly higher temperatures, including for fluids. Leakages from enclosures like gear boxes or hydraulic systems could increase the risk of fluid reaching hot surfaces, thus producing fires hard to be controlled and isolated. The designer have to evaluate the flammability of fluids and they should select several solutions for a particular application in order to estimate the costs of different solutions and to mitigate the risk of having accidental fires due to a specific fluid grade. The tests were done with the help of an original equipment allowing a dedicated soft assistance in order to protect the operator and to sustain reproducibility, according to the standard SR EN ISO 20823:2004 Petroleum and related products. The determination of the flammability characteristics of fluids in contact with hot surfaces - Manifold ignition test, There were tested the following grades of hydraulic oil HLP 68 X-Oil, HFC Prista, MHE 40 Prista (100% oil), a rapeseed oil (obtained after a dewaxing process) and an emulsion oil-in-water (5% vol. MHE 40 Prista). There were identified distinct behaviours of these fluids under the test condition
In-beam fast-timing measurements in 103,105,107Cd
Fast-timing measurements were performed recently in the region of the
medium-mass 103,105,107Cd isotopes, produced in fusion evaporation reactions.
Emitted gamma-rays were detected by eight HPGe and five LaBr3:Ce detectors
working in coincidence. Results on new and re-evaluated half-lives are
discussed within a systematic of transition rates. The states in
103,105,107Cd are interpreted as arising from a single-particle excitation. The
half-life analysis of the states in 103,105,107Cd shows no change in
the single-particle transition strength as a function of the neutron number
Grădini legumicole ornamentale in sistem familial
Ornamental vegetable gardens have a long history on the European continent. The design of the gardens is different due to influences originated from customs and traditions, which represent important elements in their composition and are reflected in the vegetable growing methods and species used. The purpose of this paper is to analyse the opportunities that these gardens have and to satisfy the nutritional and aesthetic needs of a family.To reach the aim and proposed objectives a series of experiments and case studies were conducted. By combining the owners underlined nutritional needs from our previous studies and the obtained results from our experiments, applicable solutions were created for family vegetable gardens.From a therapeutic pointof view this type of landscape design helps maintain cultural identity, encouraging communication and socialization between members of a community.The obtained results show that the studied family gardens situated in urban areas have a positive influenceon the sustainability of the community maintaining a “heathy life style” for its inhabitants
Rezultate partiale într-o cultură de busuioc în sistem de intercropping
The paper presents the behavior of basil (Ocimum basilicum L.) crop
in two intercropping systems with runner bean (Phaseolus coccineus L.) and
cherry tomatoes (Licopersicon esculentum L.). The obtained results were
evaluated based on morphological and phenological characteristics of the
chosen species, revealing the agrophitotechnological character of alimentary
basil and its productivity in the two intercropping systems. Due to the
decorative valences that basil presents, which were highlighted in the
intercropping systems, this species brings unity and harmony to the specific
ornamental vegetable garden of our country
Search for particle–vibration coupling in 65Cu
The lifetime of the 9/2 + state of 65 Cu, at 2534 keV, has been measured by fast timing techniques, in order to establish wether such state arises from a weak coupling between a p3=2 proton and the 3 octupole vibration at 3.56 MeV in the 64 Ni core. The 65 Cu nucleus was populated by the reaction 7 Li + 64 Ni at 32 MeV, at the Horia Hu- lubei National Institute of Physics and Nuclear Engineering (NIPNE) in Bucharest, and its -decay was detected by the ROSPHERE array. The measured lifetime coresponds to a B(E3) reduced transition probability to the ground state equal to 8.89 W.u., in agreement with theoretical predictions in the weak coupling limit
Fast-timing measurements in 95,96Mo
Half-lives of the 19/2+ and 21/2+ states in 95Mo and of the 8+ and 10+ states
in 96Mo were measured. Matrix elements for yrast transitions in 95Mo and 96Mo
are discussed.Comment: Proceedings of XIX International School on Nuclear Physics, Neutron
Physics and Applications, Varna, Bulgaria, 2011, 5 pages, 6 figure
Studii preliminare privind cultura plantelor legumicole în ghivece şi containere
This paper presents a literature review of the vegetable growing in pots and containers. Growing vegetables in this system it is known for a long time in the countries of Western Europe and in some areas of our country. Adopting this system in Romania requires in-depth studies regarding: the suitable species, the type of pots and soil recipes needed, crop establishment and maintenance (fertilizers aplication, irrigation) and, in some cases, optimization of the certain referring to light and placement of pots and containers. This cultivation system is spread mainly in peri-urban areas were the interest among gardeners to grow their own crops and secure their vegetable needs is high and has a favorable environment. Vegetable plants cultivated in pots and containers present a large diversity worldwide but, within this diversity, the climatic conditions from our country must be appropriate for an efficient activity
Quadrupole collectivity in neutron-rich Cd isotopes
4 pags., 2 figs. -- INPC 2013 – International Nuclear Physics ConferenceThe investigation of the excitation energies of the 21+ –states in the neutron-rich Cd isotopes shows an irregular behaviour when approaching the neutron shell-closure at N = 82. The energy of the 21+–state in 128Cd is lower than the one in 126Cd. The transition strength B(E2, 0gs+ → 21+) in the even isotopes 122−128Cd was measured in Coulomb excitation experiments with the high-purity germanium detector array MINIBALL at REXISOLDE (CERN). The values for 122,124Cd coincide with beyond-mean-field calculations with a resultant prolate deformation, whereas 126,128Cd are better described by shell-model calculations.This project is supported by BMBF (No. 06 DA 9036I, No. 05 P12 RDCIA, No. 05 P12 RDCIB and
No. 05 P12 PKFNE), HIC for FAIR, EU through EURONS (No. 506065) and ENSAR (No. 262010)
and the MINIBALL and REX-ISOLDE collaborations
Energy separation of the 1⁺/1⁻ parity doublet in ²⁰Ne
The parity doublet of 1⁺/1⁻ states of Ne⁻²⁰ at 11.26 MeV excitation energy is one of the best known test cases to study the weak part of the nuclear Hamiltonian. The feasibility of parity violation experiments depend on the effective nuclear enhancement factor (RN/|E(1⁺) − E(l⁻)|) which amplifies the impact of the matrix element of the weak interaction on observables indicating parity mixing. An extreme large value of Rn/|E(1⁺) − E(l⁻)| = (670 ± 7000) MeV⁻¹ was reported for the doublet in ²⁰Ne. The large uncertainty depends amongst others on the large uncertainty of |E(1⁺) − E(l⁻)| = 7.7±5.5 keV of the parity doublet. Nuclear resonance fluorescence (NRF) experiments with linearly and circularly polarized photon beams were performed at the High Intensity Gamma-Ray Source at Duke University, Durham, NC, USA, to determine the energy difference of the parity doublet with higher precision. The different angular distributions for 0⁺ → 1⁻ → 0⁺ and 0⁺ → 1⁺ → 0⁺ NRF cascades in polarized γ-ray beams were used to determine the energy difference of the parity doublet to 2.9(13) keV
Probing particle-phonon-coupled states in the neutron-rich nucleus Cu-65 by lifetime measurements with fast-timing techniques
The Cu-65 nucleuswas populated by the Ni-64(Li-7,alpha 2n)Cu-65 reaction
and the lifetime of the 9/2(+) state at 2.5 MeV was measured by
electronic fast-timing technique, providing the value tau = 37(3) ps.
The reduced transition probability B(E3) = 8.82(165) W.u. is deduced and
compared to theoretical predictions in the framework of a
particle-vibration (weak) coupling model. The results indicate that the
9/2(+) state is a member of the 3(-)circle times pi p3/2 multiplet,
built by coupling the octupole 3(-) phonon of Ni-64 to an unpaired
proton in the p(3/2) level, confirming the robustness of core
excitations in the medium mass nucleus Ni-64
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