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Sample records for cl cn nc

  1. Theoretical insights into the properties of the borazine×××X– complexes (X– = H, F, Cl, CN, NC or NCO

    Directory of Open Access Journals (Sweden)

    REZA GHIASI

    2009-09-01

    Full Text Available The character of the NH×××X- (X- = H, F, Cl, CN, NC or NCO in-teractions of borazine with anions was studied using ab initio method. The interaction energies were calculated at the B3LYP/6-311++G(d,p level. The energetic and geometric characteristics of the complexes were compared. The “atoms in molecules” methodology was used to analyze the electron density and to obtain atomic contributions to the total energy and charge of the systems. Natural bond orbital (NBO analysis demonstrated the charge transfer in the study of the nature of the intermolecular interactions. The aromaticity of these compounds was predicted in light of the nucleus-independent chemical shift (NICS.

  2. Computational Studies Of Chemical Reactions: The Hnc-Hcn And Ch[subscript3]Nc-Ch[subscript3]Cn Isomerizations

    Science.gov (United States)

    Halpern, Arthur M.

    2006-01-01

    The application of computational methods to the isomerization of hydrogen isocyanide to hydrogen cyanide, HNC-HCN is described. The logical extension to the exercise is presented to the isomerization of the methyl-substituted compounds, methylisocyanide and methylcyanide, Ch[subscript 3]NC-CH[subscript3]CN.

  3. The electron density distribution in CN−, LiCN and LiNC. The use of minimal and extended basis set SCF calculations

    NARCIS (Netherlands)

    Bats, J.W.; Feil, D.

    1977-01-01

    Electron density maps are reported for the CN−ion and the LiCN and LiNC molecules, calculated from molecular wave-functions near the Hartree-Fock limit. The electron density distribution derived from CNDO/ 2 wavefunctions does not resemble the ab initio results. The ultimate ability of a minimal bas

  4. DSC/TG-MS联用技术研究CL-20与NC-NG体系的相互作用%Research on the Interaction between CL-20 and NC-NG System via DSC/TG-MS

    Institute of Scientific and Technical Information of China (English)

    常海

    2007-01-01

    应用DSC/TG-MS联用新技术研究了CL-20与NC/NG双基混合体系的相互作用,在溶解制样条件下,NC/NG体系与CL-20不仅有物理相互作用,还有明显的化学相互作用,表现为:CL-20的存在,使得NG的升华过程和CL-20的分解过程显著提前,NC/NG体系的分解过程滞后;并研究了不同粒度的CL-20的热失重过程,表现为大颗粒CL-20热分解过程中有两次明显的热失重,小颗粒CL-20为一次热失重.

  5. Theoretical study on the reaction of CN radicals with ClO radicals by density functional theory

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The reaction mechanism of CN radicals with ClO radicals has been studied theoretically using ab initio and density functional theory(DFT).The result shows that the main reaction path is the O atom in radical ClO attacks the C atom in radical CN to compose the intermediate 1 ClOCN.Three thermodynamically accessible prodncts,P1(CO+ClN),P3(NO+CCl),and P4(ClNCO),were obtained from intermediate 1 through isomerization and decomposition reactions.P4 is the primary product,and P1 and P3 are the secondary product.Compared with the singlet potential energy surface,the contribution of the triplet potential energy surface can be ignored.

  6. Interplay between halogen and chalcogen bonding in the XCl∙∙∙OCS∙∙∙NH₃ (X = F, OH, NC, CN, and FCC) complex.

    Science.gov (United States)

    Zhao, Qiang

    2014-10-01

    The interplay between halogen and chalcogen bonding in the XCl∙∙∙OCS and XCl∙∙∙OCS∙∙∙NH3 (X = F, OH, NC, CN, and FCC) complex was studied at the MP2/6-311++G(d,p) computational level. Cooperative effect is observed when halogen and chalcogen bonding coexist in the same complex. The effect is studied by means of binding distance, interaction energy, and cooperative energy. Molecular electrostatic potential calculation reveals the electrostatic nature of the interactions. Cooperative effect is explained by the difference of the electron density. Second-order stabilization energy was calculated to study the orbital interaction in the complex. Atoms in molecules analysis was performed to analyze the enhancement of the electron density in the bond critical point.

  7. Concerted interaction between pnicogen and halogen bonds in XCl-FH2P-NH3 (X=F, OH, CN, NC, and FCC).

    Science.gov (United States)

    Li, Qing-Zhong; Li, Ran; Liu, Xiao-Feng; Li, Wen-Zuo; Cheng, Jian-Bo

    2012-04-10

    We analyze the interplay between pnicogen-bonding and halogen-bonding interactions in the XCl-FH(2)P-NH(3) (X=F, OH, CN, NC, and FCC) complex at the MP2/aug-cc-pVTZ level. Synergetic effects are observed when pnicogen and halogen bonds coexist in the same complex. These effects are studied in terms of geometric and energetic features of the complexes. Natural bond orbital theory and Bader's theory of "atoms in molecules" are used to characterize the interactions and analyze their enhancement with varying electron density at critical points and orbital interactions. The physical nature of the interactions and the mechanism of the synergetic effects are studied using symmetry-adapted perturbation theory. By taking advantage of all the aforementioned computational methods, the present study examines how both interactions mutually influence each other.

  8. Condensed-phase effects on the structural properties of FCH2CN-BF3 and ClCH2CN-BF3: a matrix-isolation and computational study.

    Science.gov (United States)

    Buchberger, Amanda R; Danforth, Samuel J; Bloomgren, Kaitlin M; Rohde, John A; Smith, Elizabeth L; Gardener, Colin C A; Phillips, James A

    2013-10-01

    We have measured several IR bands of FCH2CN-BF3 and ClCH2CN-BF3 in solid nitrogen, argon, and neon. These bands include the B-F asymmetric stretch (νBF(a)), the B-F symmetric stretch (νBF(s)), the BF3 symmetric deformation or "umbrella" mode (δBF(s)), and the CN stretch (νCN). For both complexes, the frequencies of these modes shift across the various media, particularly the B-F asymmetric stretching band, and thus they indicate that the inert gas matrix environments significantly alter the structural properties of FCH2CN-BF3 and ClCH2CN-BF3. Furthermore, the frequencies shift in a manner that parallels the dielectric constant of these media, which suggests a progressive contraction of the B-N distances in these systems and also that it parallels the ability of the medium to stabilize the increase in polarity that accompanies the bond contraction. We have also mapped the B-N distance potentials for FCH2CN-BF3 and ClCH2CN-BF3 using several density functional and post-Hartree-Fock methods, all of which reveal a flat, shelflike region that extends from the gas-phase minimum (near 2.4 Å) toward the inner wall (to about 1.7 Å). Furthermore, we were able to rationalize the medium effects on the structure by constructing hybrid bond potentials composed of the electrostatic component of the solvation free energy and the gas-phase electronic energy. These curves indicate that the solvation energies are greatest at short B-N distances (at which the complex is more polar), and ultimately, the potential minima shift inward as the dielectric constant of the medium increases.

  9. Study by electronic paramagnetic resonance of the Ni(CN)4K2 irradiated with electrons in KCl e NaCl

    International Nuclear Information System (INIS)

    The Ni(CN)4K2 irradiated with electrons in KCl and NaCl is studied by electronic paramagnetic resonance. The validity of two approximations, is tested, one, said of intermediate symmetry and the other one of super-hyperfine structure, to evaluate the coefficients of the ligants in the molecular orbital

  10. Preparation and Thermochemistrg of Crystalline Compound( n-C12 H25 NH3 ) 2 CdCl4 ( s)%晶体化合物( n-C12 H25 NH3 ) 2 CdCl4 ( s )的制备及热化学研究

    Institute of Scientific and Technical Information of China (English)

    王晓兰; 王建军; 范妮; 张静; 倪俊超; 陈经涛

    2015-01-01

    The crystal compounds synthesized by the hydrothermal synthesis of (n-C12H25NH3)2 CdCl4(s);compound were calculated based on the thermochemical principle ( n-C12 H25 NH3 ) 2 CdCl4 ( s) of the lattice energy of 889. 81 kJ·mol-1 . Using isothermal solution reaction calorimeter,the standard molar enthalpy of the compound was obtained:[n-C12H25NH3)2 CdCl4,S] = - (1 836. 23 + 7. 95) kJ David mol-1.%用水热合成法合成了晶体化合物 (n-C12H25NH3)2 CdCl4(s);根据热化学原理计算了化合物(n-C12H25 NH3)2 CdCl4(s)的晶格能为889. 81 kJ·mol-1. 利用等温溶解-反应热量计,得到了该化合物的标准的摩尔焓: [(n-C12H25NH3)2 CdCl4,s] = -(1836.23 ±7.95) kJ·mol-1.

  11. Study on the covalence of Cu and chemical bonding in an inorganic fullerene-like molecule, [CuCl]20[Cp*FeP5]12[Cu-(CH3CN)2+Cl-]5, by a density functional approach

    Institute of Scientific and Technical Information of China (English)

    WANG Bingwu; XU Guangxian; CHEN Zhida

    2004-01-01

    The electronic structure and chemical bonding in a recently synthesized inorganic fullerene-like molecule, {[CuCl]20[Cp*FeP5]12 [Cu(CH3CN)+2Cl-]5}, has been studied by a density functional approach. Geometrical optimization of the three basic structural units of the molecule is performed with Amsterdam Density Functional Program. The results are in agreement with the experiment. Localized MO's obtained by Boys-Foster method give a clear picture of the chemical bonding in this molecule. The reason why CuCl can react with Cp*FeP5 in solvent CH3CN to form the fullerene-like molecule is explained in terms of the soft-hard Lewis acid base theory and a new concept of covalence.

  12. Nuclear magnetic resonance study of the ferroelastic phase transition of order-disorder type in [N(C2H5)4]2CdCl4

    Science.gov (United States)

    Lim, Ae Ran; Kim, Min Soo; Lim, Kye-Young

    2016-08-01

    This study uses nuclear magnetic resonance (NMR) techniques to examine the detailed changes in [N(C2H5)4]2CdCl4 around its phase transition at the temperature TC = 284 K. The chemical shifts and spin-lattice relaxation times in the rotating frame (T1ρ) were determined from 1H magic angle spinning (MAS) NMR and 13C cross-polarization (CP)/MAS NMR spectra. The two sets of inequivalent 1H and 13C nuclei in CH3 and CH2 were distinguished. A ferroelastic phase transition was observed at TC, without structural symmetry change. The phase transition is mainly attributed to the orientational ordering of the [N(C2H5)4]+ cations, and the spectral splitting at low temperature is associated with different ferroelastic domains.

  13. LDA+DMFT investigation of the organic charge transfer salt κ-(BEDT-TTF)2Cu[N(CN)2]Cl

    Science.gov (United States)

    Feldner, Helene; Jacko, Anthony; Rose, Eva; Dressel, Martin; Valenti, Roser; Jeschke, Harald O.

    2013-03-01

    We combine density functional theory with dynamical mean field theory for the study of organic molecular crystals using a new scheme to construct molecular Wannier functions. We calculate spectral and optical properties for the strongly correlated material κ-(BEDT-TTF)2Cu[N(CN)2]Cl. The new method allows us to analyze the contributions of intradimer and interdimer contributions to the optical conductivity on the same footing. We find in agreement with experiment that strong correlations lead to a Hubbard peak in the optical conductivity.

  14. Theoretical study on the reaction of CN radicals with ClO radicals by density functional theory

    Institute of Scientific and Technical Information of China (English)

    YANG YuHong; HUANG XuRi; SUN ChiaChung

    2009-01-01

    The reaction mechanism of CN radicals with CIO radicals has been studied theoretically using ab initio and density functional theory (DFT).The result shows that the main reaction path is the O atom in radical CIO attacks the C atom in radical CN to compose the intermediate 1 CIOCN.Three thermodynamically accessible prodncts,P_1 (CO+CIN),P_3 (NO+CCI),and P_4 (CINCO),were obtained from intermediate 1 through isomerization and decomposition reactions.P_4 is the primary product,and P_1 and P_3 are the secondary product.Compared with the singlet potential energy surface,the contribution of the triplet potential energy surface can be ignored.

  15. Crystal structure and AC conductivity mechanism of [N(C3H7)4]2CoCl4 compound

    Science.gov (United States)

    Moutia, N.; Oueslati, A.; Ben Gzaiel, M.; Khirouni, K.

    2016-09-01

    We found that the new organic-inorganic compound [N(C3H7)4]2 CoCl4, crystallizes at room temperature in the centrosymmetric monoclinic system with P21/c space group. The atomic arrangement can be described by an alternation of organic and organic-inorganic layers parallel to the (001) plan. Indeed, the differential scanning calorimetry (DSC) studies indicate a presence of three order-disorder phase transitions located at 332, 376 and 441 K. Furthermore, the conductivity was measured in the frequency range from 200 MHz to 5 MHz and temperatures between 318 K and 428 K using impedance spectroscopy. Analysis of the AC conductivity experimental data obtained, and the frequency exponent s with theoretical models reveals that the correlated barrier hopping (CBH) model is the appropriate mechanism for conduction in the title compound. The analysis of the dielectric constants ε ‧ and ε ″ versus temperature, at several frequencies, shows a distribution of relaxation times. This relaxation is probably due to the reorientational dynamics of [N(C3H7)4]+ cations.

  16. Structural characterization and AC conductivity of bis tetrapropylammonium hexachlorado-dicadmate, [N(C3H7)4]2Cd2Cl6

    International Nuclear Information System (INIS)

    Synthesis, crystal structure, vibrational study, 13C, 111Cd CP-MAS-NMR analysis and electrical properties of the compound [N(C3H7)4]2Cd2Cl6, are reported. The latter crystallizes in the triclinic system (space group P1-bar, Z = 2) with the following unit cell dimensions: a = 9.530(1) A, b = 11.744(1) A, c = 17.433(1) A, α = 79.31(1)o, β = 84.00(1)o and γ = 80.32(1)o. Besides, its structure was solved using 6445 independent reflections down to R = 0.037. The atomic arrangement can be described by alternating organic and inorganic layers parallel to the (11-bar 0) plan, made up of tetrapropylammonium groups and Cd2Cl6 dimers, respectively. In crystal structure, the inorganic layer, built up by Cd2Cl6 dimers, is connected to the organic ones through van der Waals interaction in order to build cation-anion-cation cohesion. Impedance spectroscopy study, reported in the sample, reveals that the conduction in the material is due to a hopping process. The temperature and frequency dependence of dielectric constants of the single crystal sample has been investigated to determine some related parameters to the dielectric relaxation.

  17. Theoretical study of the interaction mechanism of single-electron halogen bond complexes H3C…Br-Y(Y=H,CN,NC,CCH,C2H3)

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    The characteristics and structures of single-electron halogen bond complexes H3C…Br-Y(Y = H,CCH,CN,NC,C2H3) have been investigated by theoretical calculation methods.The geometries were optimized and frequencies calculated at the B3LYP/6-311++G level.The interaction energies were corrected for basis set superposition error(BSSE) and the wavefunctions obtained by the natural bond orbital(NBO) and atom in molecule(AIM) analyses at the MP2/6-311++G level.For each H3C…Br-Y complex,a single-electron Br bond is formed between the unpaired electron of the CH3(electron donor) radical and the Br atom of Br-Y(electron acceptor);this kind of single-electron bromine bond also possesses the character of a"three-electron bond".Due to the formation of the single-electron Br bond,the C-H bonds of the CH3 radical bend away from the Br-Y moiety and the Br-Y bond elongates,giving red-shifted single-electron Br bond complexes.The effects of substituents,hybridization of the carbon atom,and solvent on the properties of the complexes have been investigated.The strengths of single-electron hydrogen bonds,single-electron halogen bonds and single-electron lithium bonds have been compared.In addition,the single-electron halogen bond system is discussed in the light of the first three criteria for hydrogen bonding proposed by Popelier.

  18. Soluble redox-active polymetallic chains [{Ru-0(CO)(L)(bpy)}(m)](n) (bpy=2,2 '-bipyridine, L = PrCN, Cl-; m=0,-1): Electrosynthesis and characterization

    NARCIS (Netherlands)

    F. Hartl; A.K. Renfrew; F. Lafolet; T. Mahabiersing; M.J. Calhorda; S. Chardon-Noblat; M. Haukka; A. Deronzier

    2009-01-01

    Electrochemical and spectroelectrochemical techniques were employed to study in detail the formation and so far unreported spectroscopic properties of soluble electroactive molecular chains with nonbridged metal-metal backbones, namely, [{Ru-0(CO)(PrCN)(bpy)}(m)](n) (m = 0, -1) and [{Ru-0(CO)(bpy)Cl

  19. Electrical properties and conduction mechanism of [N(C2H5)4][N(CH3)4]CuCl4 compound

    Science.gov (United States)

    Drissi, N.; Karoui, K.; Jomni, F.; Rhaiem, A. Ben

    2016-09-01

    The [N(CH3)4][N(C2H5)4]CuCl4 single crystal has been synthetized in order to determinate the temperatures transition and to study the electrical properties and the conduction mechanism. At room temperature, this compound crystallizes in the tetragonal system with P-421m space group. The calorimetric study shows three anomalies at 248, 284 and 326 K. Electrical conduction and dielectrical relaxation mechanisms at various frequencies and temperatures were analyzed by impedance spectroscopy and the equivalent circuit based on the Z-View-software was proposed. The variation of fp relaxation determinate by the modulus study and σdc specific to the AC conductivity as a function of temperature and confirm the all transitions for our sample. The values of the activation energy are determined and compared by those, which are found in the similar compound. Frequencies dependence of alternative current (AC) conductivity is interpreted in terms of Jonscher's law and the conduction mechanisms for each phase are determined with the Elliot's theory.

  20. Unveiling the microscopic nature of correlated organic conductors: The case of κ-(ET)2Cu[N(CN)2]BrxCl1-x

    Science.gov (United States)

    Ferber, Johannes; Foyevtsova, Kateryna; Jeschke, Harald O.; Valentí, Roser

    2014-05-01

    A few organic conductors show a diversity of exciting properties like Mott insulating behavior, spin liquid, antiferromagnetism, bad metal, or unconventional superconductivity controlled by small changes in temperature, pressure, or chemical substitution. While such a behavior can be technologically relevant for functional switches, a full understanding of its microscopic origin is still lacking and poses a challenge in condensed matter physics since these phases may be a manifestation of electronic correlation. Here we determine from first principles the microscopic nature of the electronic phases in the family of organic systems κ-(ET)2Cu[N(CN)2]BrxCl1-x by a combination of density functional theory calculations and the dynamical mean field theory approach in a form adapted for organic systems. By computing spectral and optical properties we are able to disentangle the origin of the various optical transitions in these materials and prove that correlations are responsible for relevant features. Remarkably, while some transitions are inherently affected by correlations, others are completely uncorrelated. We discuss the consequences of our findings for the phase diagram in these materials.

  1. Theoretical Characterization of Hydrogen Bonding Interactions between RCHO (R = H, CN, CF3, OCH3, NH2) and HOR′(R′ = H, Cl, CH3, NH2, C(O)H, C6H5)

    Indian Academy of Sciences (India)

    Damanjit Kaur; Rajinder Kaur

    2015-07-01

    In this work, density functional theory and ab initio molecular orbital calculations were used to investigate the hydrogen bonded complexes of type RCHO···HOR′(R = H, CN, CF3, OCH3, NH2; R′ = H, Cl, CH3, NH2, C(O)H, C6H5) employing 6-31++g** and cc-pVTZ basis sets. Thus, the present work considers how the substituents at both the hydrogen bond donor and acceptor affect the hydrogen bond strength. From the analysis, it is reflected that presence of –OCH3 and –NH2 substituents at RCHO greatly strengthen the stabilization energies, while –CN and –CF3 decrease the same with respect to HCHO as hydrogen bond acceptor. The highest stabilization results in case of (H2N)CHO as hydrogen bond acceptor. The variation of the substituents at –OH functional group also influences the strength of hydrogen bond; nearly all the substituents increase the stabilization energy relative to HOH. The analysis of geometrical parameters; proton affinities, charge transfer, electron delocalization studies have been carried out.

  2. Standard molar enthalpy of combustion and formation of quaternary ammonium tetrachlorozincate [n-CnH2n+1 N(CH3)3]2 ZnCl4.

    Science.gov (United States)

    Ren, Biyan; Zhang, Shuying; Ruan, Bei; Wu, Kezhong; Zhang, Jianjun

    2013-12-01

    The standard molar enthalpy of combustion (Δc H (o) m) and formation (Δf H (o) m) of quaternary ammonium tetrachlorozincate [n-CnH2n+1N(CH3)3]2ZnCl4 have been determined for the hydrocarbon chain length from even number 8 to 18 of carbon atoms (n) by an oxygen-bomb combustion calorimeter. The results indicated that the values of Δc H (o) m increased and Δf H (o) m decreased with increasing chain length and showed a linear dependence on the number of carbon atoms, which were caused by that the order and rigidity of the hydrocarbon chain decreased with increasing the carbon atoms. The linear regression equations are -Δc H (o) m =1440.50n +3730.67 and -Δf H (o) m = -85.32n + 1688.22.

  3. Synthesis, Characterization, Spectroscopy and Study of Antimicrobial Properties of Two New Substituted Trichloroaluminate(Ⅲ)Complexes [AlCl3X]-(X =SCN-, CN-)

    Institute of Scientific and Technical Information of China (English)

    Zahra Shokri Aghbolagh; Shahriar Ghammamy; Sajjad Sedaghat; Shahram Jahandide

    2013-01-01

    The synthesis and characterization of two new aluminate(Ⅲ) complexes with general formula K[AlCl3X] are reported.These compounds derived from aluminate trichloride and related salts.Potassium trichlorothiocyanoaluminate,PCTA,and potassium trichlorocyanatoaluminate,PCCA,are two new ionic aluminate complexes.They can be easily synthesized in a nearly quantitative yield by using the direct reaction of AlCl3 and KX.The complexes were characterized by physico-chemical and spectroscopic methods.Theoretical calculations have been used for the extraction of structural and spectroscopic data of these new synthesized complexes.The antibacterial activities of such compounds were studied against the Staphylococcus aureus,Escherichia coli,Staphylococcus Epidermidis,Estreptococo B and Shigella.

  4. Cyanido-bridged one-dimensional systems assembled from[ReⅣCl4(CN)2]2-and [MⅡ(cyclam)]2+(M=Ni,Cu)precursors

    Institute of Scientific and Technical Information of China (English)

    BHOWMICK Indrani; HARRIS T.David; DECHAMBENOIT Pierre; HILLARD Elizabeth A.; PICHON Céline; JEON Ie-Rang; CL(E)RAC Rodolphe

    2012-01-01

    Three new cyanido-bridged heterometallic ReIVNiⅡ and ReIVCuⅡ one-dimensional systems were synthesized and extensively characterized both structurally and magnetically.Single-crystal X-ray diffraction analysis revealed that these compounds display a common topology,with chains composed of alternating[ReⅣCI4(CN)2]2- and [MⅡ(cyclam)]2+(M =Ni in 1,Cu in 2)or[CuⅡ(N,N'-dimethylcyclam)]2+(in 3)building units.Two different chain orientations with a tilt angle of ca.51° to 55° are present in the crystal packing of these compounds.The magnetic susceptibility measurements suggest the presence of intrachain ferromagnetic interactions between the S =3/2 RenⅣcenters and the 3d metal ions:S =1 NiⅡ or S =1/2 CuⅡ.At low temperature,a three-dimensional ordered magnetic phase induced by interchain antiferromagnetic interactions(antiferromagnetic for 1 and 2; canted antiferromagnetic for 3)is detected for the three compounds.

  5. The luminescence properties of the heteroleptic [Re(CO)3(N∩N)Cl] and [Re(CO)3(N∩N)(CH3CN)](+) complexes in view of the combined Marcus-Jortner and Mulliken-Hush formalism.

    Science.gov (United States)

    Woźna, Agnieszka; Kapturkiewicz, Andrzej

    2015-11-11

    The luminescence properties of the heteroleptic fac-Re(CO)3(+) complexes with α-diimine N∩N ligands, neutral [Re(CO)3(N∩N)Cl] and cationic [Re(CO)3(N∩N)(CH3CN)](+) species, have been studied in acetonitrile solutions at room temperature. The investigated complexes exhibit the metal to ligand charge-transfer (MLCT) phosphorescence with the emission characteristics strongly affected by the nature of coordinated α-diimine N∩N ligands. The observed trends can be quantitatively described by invoking the electronic interactions between (3)*LC and (3)*MLCT states as well as the spin-orbit interactions between (3)*MLCT and (1)*MLCT states, respectively. All quantities necessary for the description can be straightforwardly accounted from analysis of the radiative (1)*MLCT ← S0 and (3)*MLCT → S0 charge transfer processes. It is also demonstrated that the radiative kr and non-radiative knr decay rate constants of the excited (3)*MLCT states can be interpreted within the same set of parameters. As expected from the Mulliken-Hush formalism the both processes are strictly related that allows prediction of the non-radiative knr rate constants using the parameters available from analysis of the radiative (1)*MLCT ← S0 and (3)*MLCT → S0 charge transfer processes.

  6. Electronic and electrochemical properties of platinum(II) and platinum-mercury-carboxylato complexes containing 2-Me2NCH2C6H4, 2,6-(Me2NCH2)2C6H3- and 2-Me2NC6H4CH2 - ligands

    NARCIS (Netherlands)

    Koten, G. van; Ploeg, A.F.M.J. van der; Schmitz, J.E.J.; Linden, J.G.M. van der

    1982-01-01

    The organoplatinum(II) compounds [{2, 6-(Me{2}NCH{2}){2}C{6}H{3}}PtBr] and cis-[(C-N){2}Pt] (C-N = 2-Me{2}NCH{2}C{6}H{4}, 2-Me{2}NC{6}H{4}CH{2}) can be chemically irreversibly oxidized in the potential range 1.00 to 1.35 V vs. an Ag/AgCl electrode, whereas the organoplatinum@?mercury complexes [{2,6

  7. Solid solution cermet: (Ti,Nb)(CN)-Ni cermet.

    Science.gov (United States)

    Kwon, Hanjung; Jung, Sun-A

    2014-11-01

    Solid solution powders without W, (Ti,Nb)(CN) powders with a B1 structure (NaCl like), were synthesized by high energy milling and carbothermal reduction in nitrogen. The range of molar ratios of Ti/Nb for forming complete (Ti,Nb)(CN) phase was broader than that of Ti/W for the (Ti,W)(CN) phase because carbide or carbonitride of Nb had a B1 crystal structure identical to Ti(CN) while WC had a hexagonal crystal structure. The results revealed that the hardness of (Ti,Nb)(CN)-Ni cermets was higher than that of (Ti,W)(CN)-Ni cermets. The lower density of the (Ti,Nb)(CN) powder contributed to the higher hardness compared to (Ti,W)(CN) because the volumetric ratio of (Ti,Nb)(CN) in the (Ti,Nb)(CN)-Ni cermets was higher than that of (Ti,Nb)(CN) in the (Ti,W)(CN)-Ni cermets at the same weight ratio of Ni. Additionally, it was assumed that intrinsic the properties of (Ti,Nb)(CN) could also be the cause for the high hardness of the (Ti,Nb)(CN)-Ni cermets. PMID:25958611

  8. Fusion-Fission process and gamma spectroscopy of binary products in light heavy ion collisions (40 {<=} A{sub CN} {<=} 60); Processus de fusion-fission et spectroscopie gamma des produits binaires dans les collisions entre ions lourds legers (40 {<=} A{sub NC} {<=} 60)

    Energy Technology Data Exchange (ETDEWEB)

    Nouicer, Rachid [Institut de Recherche Subatomique, CNRS-IN2P3 - Universite Louis Pasteur, 67 - Strasbourg (France)

    1997-11-21

    During the work on which this Thesis is based, the significant role of the Fusion-Fission Asymmetric mechanism in light heavy ion collisions (A{sub NC} {<=} 60) has been emphasized. The Spin Dis-alignment in the oblate-oblate system has supplied evidence for the first time for the Butterfly mode in a resonant-like reaction. These two aspects, one macroscopic and the other more closely related to microscopic effects are certainly different from a conceptual point of view but are quite complementary for a global understanding of dinuclear systems. In the first part, inclusive and exclusive measurements of the {sup 35}Cl + {sup 12}C and {sup 35}Cl + {sup 24}Mg reaction have been performed at 8 MeV/nucleon in the Saclay experiment. These measurements have permitted us to verify the origin of products which have given rise of the asymmetric fusion-fission mechanism and which have demonstrated that the three-body process in this energy range is very weak. In the second part the {sup 28}Si + {sup 28}Si reaction has been performed at the resonance energy E{sub lab}> = 111.6 MeV at Strasbourg with the Eurogam phase II multi-detector array and VIVITRON accelerator. An angular momentum J{sup {pi}} 38{sup +} for inelastic and mutual channels of the {sup 28}Si + {sup 28}Si exit channel has been measured and has supplied evidence for a spin dis-alignment which has been interpreted in the framework of a molecular model by Butterfly motion. The spectroscopic study of {sup 32}S nucleus, has revealed the occurrence of a new {gamma}-ray transition 0{sup +}(8507.8 keV) {yields} 2{sub 1}{sup +}(2230.2 keV). (author) 105 refs., 116 figs., 26 tabs.

  9. Large N_c

    OpenAIRE

    Jenkins, Elizabeth E.

    2009-01-01

    The 1/N_c expansion of QCD with N_c=3 has been successful in explaining a wide variety of QCD phenomenology. Here I focus on the contracted spin-flavor symmetry of baryons in the large-N_c limit and deviations from spin-flavor symmetry due to corrections suppressed by powers of 1/N_c. Baryon masses provide an important example of the 1/N_c expansion, and successful predictions of masses of heavy-quark baryons continue to be tested by experiment. The ground state charmed baryon masses have all...

  10. Reactivity of the cyanometalate Na[Cp[prime]Mn(CO)[sub 2]CN] with titanium, zirconium, and hafnium halides. Crystal and molecular structure of the [mu]-cyano [mu]-oxo tetranuclear complex [Cp[sub 2]Zr([mu]-NC)MnCp[prime]-(CO)[sub 2

    Energy Technology Data Exchange (ETDEWEB)

    Braunstein, P. (Universite Louis Pasteur, Cedex (France)); Cauzzi, D. (Universite Louis Pasteur, Cedex (France) Universita di Parma (Italy)); Kelly, D. (Universite Louis Pasteur, Cedex (France)); Lanfranchi, M.; Tiripicchio, A. (Universita di Parma (Italy))

    1993-07-21

    In contrast to most carbonylmetalates of the transition metals, cyanide-substituted anionic complexes such as Na[Cp[prime]Mn-(CO)[sub 2]CN] (Cp[prime] = [eta]-MeC[sub 5]H[sub 4]) do not exhibit a metal-centered HOMO. Instead, this orbitals is essentially nitrogen-based, which favors coordination to metal centers through the cyanide moiety, thus generating Mn-CN-M[prime] chain systems. The cyanometalate ligand [Cp[prime]Mn(CO)[sub 2]CN][sup [minus

  11. The C$^{14}$N/C$^{15}$N Ratio in Diffuse Molecular Clouds

    CERN Document Server

    Ritchey, Adam M; Lambert, David L

    2015-01-01

    We report the first detection of C$^{15}$N in diffuse molecular gas from a detailed examination of CN absorption lines in archival VLT/UVES spectra of stars probing local diffuse clouds. Absorption from the C$^{15}$N isotopologue is confidently detected (at $\\gtrsim4\\sigma$) in three out of the four directions studied and appears as a very weak feature between the main $^{12}$CN and $^{13}$CN absorption components. Column densities for each CN isotopologue are determined through profile fitting, after accounting for weak additional line-of-sight components of $^{12}$CN, which are seen in the absorption profiles of CH and CH$^+$ as well. The weighted mean value of C$^{14}$N/C$^{15}$N for the three sight lines with detections of C$^{15}$N is $274\\pm18$. Since the diffuse molecular clouds toward our target stars have relatively high gas kinetic temperatures and relatively low visual extinctions, their C$^{14}$N/C$^{15}$N ratios should not be affected by chemical fractionation. The mean C$^{14}$N/C$^{15}$N ratio ...

  12. SIGNIFICANT NATURAL HERITAGE AREAS (NC)

    Science.gov (United States)

    The North Carolina Department of Environment and Natural Resources, Division of Parks and Recreation, Natural Heritage Program in cooperation with the NC Center for Geographic Information & Analysis, developed the Significant Natural Heritage Areas digital data to determine the a...

  13. Teach NC Basics Step by Step.

    Science.gov (United States)

    Schroeder, Roger

    1978-01-01

    Rapid expansion of numerical control (NC) machining in industry has created the need for inclusion of NC basic concepts in the industrial education curriculum. The author describes an NC unit in an industrial technology class and the program sheet and NC worksheet that he developed for machining a product. (MF)

  14. Detection of MgCn in IRC + 10216: A new metal-bearing free radical

    Science.gov (United States)

    Ziurys, L. M.; Apponi, A. J.; Guelin, M.; Cernicharo, J.

    1995-01-01

    A new metal-containing molecule, MgCN, has been detected toward the late-type star IRC + 10216, using the NRAO 12 m and IRAM 30 m telescopes. The N = 11 approaches 10, 10 approaches 9, and 9 approaches 8 transtions of this species which has a (sup 2)Sigma(sup +) ground state, have been observed in the outer envelope of this object at 3 mm. For the N = 11 approaches 10 transitions, the two spin-rotation components are clearly resolved and conclusively identify this new radical. These measurements imply a column of density for MgCN of N(sub tot) approximately 10(exp 12)/sq cm in the outer shell, which corresponds to a fractional abundance of f approximately 7x10(exp -10). This molecule, the metastable isomer of MgNC, is the third metal-bearing species thus far identified in the outer shell of IRC + 10216, and its detection implies a ratio of MgNC/MgCN approximately 22/1. MgCN may be formed through a reaction scheme involving magnesium and HNC or CN, both prominent outer shell molecules, or through synthesis on grains.

  15. Anion-Dependent Aggregate Formation and Charge Behavior of Colloidal Fullerenes (n-C60)

    Science.gov (United States)

    Mukherjee, B.; Weaver, J. W.

    2009-12-01

    The fate and transport of colloidal fullerenes (n-C60) in the environment are likely to be guided by their electrokinetic and aggregation behavior. In natural water bodies inorganic ions exert significant effects in determining the size and charge of dispersed n-C60. Although the effects of cations on the behavior of n-C60 have been studied extensively; studies on the effect of anions are relatively few and thus were the focus of our investigation. The effects of anions (e.g., Cl- , SO42-) on average aggregate size (DH) and zeta potential (ZP) of n-C60 were found to be absent in presence of monovalent cations (e.g., Na+) over the tested range of pH (3-to-12) and ionic strength (0-to-20 mM). Similar observations were noted in the presence of multivalent cations (e.g., Mg2+) near acidic and neutral pH conditions. However, under alkaline conditions (pH~10) a strong anion-dependent reversal of surface charge was noted. The ZP of n-C60 changed from -65 mV, when dispersed in DI water, to +4 mV and +40 mV in the presence of SO42- and Cl-, respectively in a 10mM salt concentration (i.e., MgCl2 and MgSO4). The corresponding DH of the dispersed n-C60 changed simultaneously from 115 nm, in DI water, to 1450 nm and 225 nm for the MgSO4 and MgCl2 electrolytes. These findings provide a better understanding of interfacial interaction characteristics of n-C60 NPs, and may lead to remediation strategies for n-C60 NPs in the environment.

  16. The effect of Ti(CN/TiNb(CN coating on erosion–corrosion resistance

    Directory of Open Access Journals (Sweden)

    William Aperador Chaparro

    2013-02-01

    Full Text Available The goal of this work was to study electrochemical behaviour in corrosion-erosion conditions for Ti(CN/TiNb(CN multilayer coatings having 1, 50, 100, 150 and 200 bilayer periods on AISI 4140 steel substrates by using a multi-target magnetron reactive sputtering device, with an r.f. source (13.56 MHz, two cylindrical magnetron cathodes and two stoichiometric TiC and Nb targets. The multi-layers were evaluated by comparing them to corrosion, erosion and erosion corrosion for a 30º impact angle in a solution of 0.5 M NaCl and silica, analysing the effect of impact angle and the number of bilayers on these coatings’ corrosion resistance. The electrochemical characterisation was performed using electrochemical impedance spectroscopy for analysing corrosion surface; surface morphology was characterised by using a high-resolution scanning electron microscope (SEM. The results showed a de-creased corrosion rate for multilayer systems tested at 30°.

  17. Adsorption and Reaction of CN + O → OCN on Cu(100) Surface: A Density Functional Theory Study

    Institute of Scientific and Technical Information of China (English)

    LI Yi; HU Jian-Ming; ZHANG Yong-Fan; LI Jun-Qian

    2005-01-01

    The adsorption and reaction of O + CN → OCN on Cu(100) are studied by using density functional theory and cluster model.Cu14 cluster model is used to simulate the surface.The calculated results show that the OCN species with the molecule perpendicular to the surface via N atom (N-down) is more favorable than other adsorption models, and the N-down at the bridge site is the most favorable.For N-down, calculated OCN symmetric and asymmetric stretching frequencies are all blue-shifted compared with the calculated values of free and in good agreement with the experiments.The charge transfer from the surface to the OCN species leads to that the bonding of OCN to the metal surface is largely ionic.The present studies also show that CN with the molecule perpendicular to the surface via C atom (NC-down) at the top site is the most stable.Except NC-down at the top site, the calculated CN stretching frequencies are all red-shifted.With O coadsorbed at the hollow site, the adsorption of NC-down at the next nearest bridge or top site is energetically more favorable than that at the adjacent hollow site.The reaction of O + CN → OCN on Cu(100) has no energy barrier via both Eley-Rideal and Langmuir-Hinshelwood processes.

  18. Review of the Development of NC Woodworking Machinery%数控木工机床发展综述

    Institute of Scientific and Technical Information of China (English)

    汪子卜; 朱兴微; 何盛; 卫佩行

    2012-01-01

      The development of NC technology in wood processing industry is stated, a five-axis NC machine to be developed is introduced and the development prospect of CN technology in the woodworking machinery field is analyzed.%  阐述了数控技术在木材加工行业的发展,介绍了目前亟待发展的五轴数控机床,分析了数控技术在木材加工机械领域的发展前景。

  19. Colloidal Behavior of Fullerenes (nC60): Role of Coions

    Science.gov (United States)

    Effects of coions on the average initial aggregate size (DH) and zeta potential (ZP) of nC60 in mono and divalent counterion (10 mM) systems were investigated at pH 3, 5.8, and 10. Differences in the effects of SO42-and Cl- could not be established, in presence of Na+, for all pH...

  20. Hemisphere jet mass distribution at finite Nc

    Directory of Open Access Journals (Sweden)

    Yoshikazu Hagiwara

    2016-05-01

    Full Text Available We perform the leading logarithmic resummation of nonglobal logarithms for the single-hemisphere jet mass distribution in e+e− annihilation including the finite-Nc corrections. The result is compared with the previous all-order result in the large-Nc limit as well as fixed-order perturbative calculations.

  1. Mammalian Mitochondrial ncRNA Database

    OpenAIRE

    Anandakumar, Shanmugam; Vijayakumar, Saravanan; Arumugam, Nagarajan; Gromiha, M. Michael

    2015-01-01

    Mammalian Mitochondrial ncRNA is a web-based database, which provides specific information on non-coding RNA in mammals. This database includes easy searching, comparing with BLAST and retrieving information on predicted structure and its function about mammalian ncRNAs. Availability The database is available for free at http://www.iitm.ac.in/bioinfo/mmndb/

  2. EnviroAtlas - Durham, NC - Demo (Parent)

    Data.gov (United States)

    U.S. Environmental Protection Agency — This EnviroAtlas dataset is the base layer for the Durham, NC EnviroAtlas Area. The block groups are from the US Census Bureau and are included/excluded based on...

  3. Zirconia (NC) zircon as a potential standard

    Science.gov (United States)

    Covey, A. K.; Braun, S. A.; Gualda, G. A.; Bream, B. R.; Fisher, C.; Wooden, J. L.; Schmitz, M. D.

    2012-12-01

    As microanalysis continues to advance and become more widespread there is a greater need for abundant and suitable age standards. Megacrystic zircons from the inactive Freeman Mine near Zirconia, NC were collected from weathered mine dump piles. Zirconia zircon crystals are large (> 1 mm) relative to typical zircons (up to 100s μm) and easily obtained; attributes that make them attractive as a potential standard. We present here preliminary data and assess the suitability of Zirconia zircons as a U-Pb geochronology, Hf-isotope and trace-element standard. Grains are variably fluorescent (Callahan et al, Southeastern Geol., 2007), and we used shortwave fluorescence to separate grains with high, medium, low/no fluorescence from one another. Images were taken of the grains before mounting and post-polishing to understand the fluorescence characterization of the surface to the core. After preparing the grains, we found that the fluorescence was not homogenous and did not provide a good means of separating out grains. In order to investigate the differences in fluorescence, we collected cathodoluminescence (CL) and backscatter electron (BSE) images and energy dispersive spectroscopy (EDS) maps using a Tescan Vega 3 LMU equipped with an Oxford X-max 50 mm2 solid-state EDS detector at Vanderbilt University. This allowed division of the grains into two types: (a) grains with finely oscillatory zoned rims, which are variably crosscut by dull-CL irregular zones, sometimes showing hourglass zoning; and (b) grains with cores showing more irregular, patchy zoning with and without thin oscillatory rims. EDS maps show no major element zoning in the zircon grains, but reveal a variety of inclusions, particularly of quartz and thorite. Preliminary U-Pb ages were obtained using a Perkin Elmer Elan DRCII ICP-MS coupled with a New Wave/Mechantek 213 nm Nd:YAG laser ablation system at Vanderbilt University. A total of ~150 individual ages on oscillatory-zoned (Type a) crystals yield a

  4. CM()CN D-computable state

    Institute of Scientific and Technical Information of China (English)

    LIU DongDong; DI YaoMin

    2008-01-01

    The notions of D-computable state and D-concurrence are generalized to the CM()CN system. A class of D-computable state on CM()CN is given and the calculating method of the lower bound of D-concurrence is provided. The obvious expression of the lower bound of D-concurrence for the state mixed by two D-pure states is derived.

  5. NC METHOD FOR GENERATION OF CONJUGATINGHYPOID GEARS BASED ON NC'S FLEXIBILITY

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    It is known that manufacture of hypoid gears is difficult and complicated, the reason lies on the limitation of traditional mechanical machine tools. With the development of NC machine tools, there should be new ways of cutting this kind of gear. Therefore, an idea to generate gears with conjugating tooth surfaces is proposed, based on the "flexibility" characteristic of NC that means various motions, in a sense, can be performed arbitrarily on NC machine tools. Using this method, the direction of the contact path on tooth surfaces can be controlled, and also, theoretically, the generated tooth surfaces can transmit motion at specific transmission ratio curve.

  6. Diagnóstico diferencial de colestase neonatal: parâmetros clínicos e laboratoriais Differential diagnosis of neonatal cholestasis: clinical and laboratory parameters

    Directory of Open Access Journals (Sweden)

    Maria Angela Bellomo-Brandao

    2010-02-01

    Full Text Available OBJETIVO: Avaliar se os parâmetros clínicos e laboratoriais poderiam auxiliar no diagnóstico diferencial da colestase neonatal (CN intra- e extra-hepática. MÉTODOS: Estudo retrospectivo de pacientes com CN hospitalizados na Clínica de Hepatologia Pediátrica do Hospital de Clínicas da Universidade Estadual de Campinas (UNICAMP, Campinas (SP, entre dezembro de 1980 e março de 2005. A abordagem para o diagnóstico da CN foi padronizada. De acordo com o diagnóstico, os pacientes foram classificados em dois grupos: I (colestase neo natal intra-hepática e II (colestase neonatal extrahepática. Para verificar se havia associação com a variável categórica, os testes de qui-quadrado e Mann-Whitney foram utilizados com correções para idade para a análise de covariância (ANCOVA. A determinação da precisão das variáveis clínicas e laboratoriais para a diferenciação dos grupos foi realizada através da análise da curva ROC. RESULTADOS: Cento e sessenta e oito pacientes foram avaliados (grupo I = 54,8% e grupo II = 45,2%. Nos pacientes com menos de 60 dias de vida, houve predominância de causas intra-hepáticas, enquanto que naqueles com mais de 60 dias, houve predominância de etiologia extrahepática (p OBJECTIVE: To evaluate if clinical and laboratory parameters could assist in the differential diagnosis of intra and extra-hepatic neonatal cholestasis (NC. METHODS: Retrospective study of NC patients admitted at the Pediatric Hepatology Outpatient Clinic of the teaching hospital of Universidade Estadual de Campinas (UNICAMP, Campinas, Brazil, between December 1980 and March 2005. The approach to the diagnosis of NC was standardized. According to diagnosis, patients were classified into two groups: I (intra-hepatic neonatal cholestasis and II (extra-hepatic neonatal cholestasis. In order to verify if there was association with the categorical variable, the chi-square and Mann-Whitney tests were used, with corrections for age for

  7. Carbon Nanotubes Investigated by N@C60 and N@C70 Spin Probes

    Science.gov (United States)

    Corzilius, B.; Gembus, A.; Dinse, K.-P.; Simon, F.; Kuzmany, H.

    2005-09-01

    Nitrogen atoms encapsulated in C60 can be used to detect small deviations from spherical symmetry via deformation-induced non-vanishing Zero-Field-Splitting (ZFS). In this context, experiments were performed by using these electronic quartet spin probes to investigate single wall carbon nanotubes. Time-fluctuating ZFS interaction would be indicative for rotational and/or translational degrees of freedom. Using pulsed EPR techniques, spin relaxation rates of N@C60 and also of N@C70 molecules with inherent static ZFS were measured. The analysis of their temperature dependence gave information about the dynamics of N@C60 and N@C70 molecules confined to the inside of the tubes.

  8. WebCN: A web-based computation tool for in situ-produced cosmogenic nuclides

    International Nuclear Information System (INIS)

    Cosmogenic nuclide techniques are increasingly being utilized in geoscience research. For this it is critical to establish an effective, easily accessible and well defined tool for cosmogenic nuclide computations. We have been developing a web-based tool (WebCN) to calculate surface exposure ages and erosion rates based on the nuclide concentrations measured by the accelerator mass spectrometry. WebCN for 10Be and 26Al has been finished and published at http://www.physics.purdue.edu/primelab/for_users/rockage.html. WebCN for 36Cl is under construction. WebCN is designed as a three-tier client/server model and uses the open source PostgreSQL for the database management and PHP for the interface design and calculations. On the client side, an internet browser and Microsoft Access are used as application interfaces to access the system. Open Database Connectivity is used to link PostgreSQL and Microsoft Access. WebCN accounts for both spatial and temporal distributions of the cosmic ray flux to calculate the production rates of in situ-produced cosmogenic nuclides at the Earth's surface

  9. NC/NG与ADN的相互作用%Interaction of NG/NC with ADN

    Institute of Scientific and Technical Information of China (English)

    张腊莹; 衡淑云; 刘子如; 张皋; 赵凤起; 谭惠民

    2009-01-01

    用高压差示扫描量热法(PDSC),热重-微商热重法(TG-DTG),研究了双基粘合剂(NC/NG体系)与二硝酰胺铵(ADN)之间的相互作用.结果表明,(NC/NG)/ADN体系中NG的分解峰由NC/NG中的207.0 ℃提前至159.8 ℃,在高压下该分解峰温提前至153.6 ℃.NC/ADN的分解峰温比NG/ADN提前了4.8 ℃,而且大部分的ADN没有被NG加速而提前分解,表明NC对ADN的作用比NG更强烈.此外,还用真空安定性试验(VST)评价了NC/NG与ADN的相容性,混合体系的净增放气量大于11 mL,属于严重不相容,证明在90 ℃下NC/NG与ADN之间也存在强烈的相互作用.

  10. Oral administration of royal jelly inhibits the development of atopic dermatitis-like skin lesions in NC/Nga mice.

    Science.gov (United States)

    Taniguchi, Yoshifumi; Kohno, Keizo; Inoue, Shin-ichiro; Koya-Miyata, Satomi; Okamoto, Iwao; Arai, Norie; Iwaki, Kanso; Ikeda, Masao; Kurimoto, Masashi

    2003-09-01

    We have shown previously that in addition to IL-4, IL-5 and IL-10, antigen-specific interferon-gamma (IFN-gamma) production by spleen cells from ovalbumin (OVA)/Alum-immunized mice is inhibited by the administration of royal jelly (RJ). Since it has been shown that both Th1 and Th2 cytokines play pathogenic roles in the generation of atopic dermatitis (AD), we have examined whether RJ suppresses the development of AD-like skin lesions in NC/Nga mice induced by repeated application of picryl chloride (PiCl) under specific pathogen-free (SPF) conditions. Oral administration of RJ to the PiCl-treated NC/Nga mice inhibited the development of AD-like skin lesions in these mice as exemplified by the significant decrease in the total skin severity scores and the decrease in hypertrophy, hyperkeratosis, and infiltration of the epidermis and corium by inflammatory cells. IFN-gamma production by spleen cells from PiCl-treated NC/Nga mice in response to TNP-KLH was partially but significantly inhibited by the oral administration of RJ, while IFN-gamma production by Con A-stimulated spleen cells was not affected. Since inducible nitric oxide (NO) synthase (iNOS)-derived NO has been suggested as an important immunoregulatory mediator in inflammatory autoimmune diseases, we have also examined the expression of iNOS in the dorsal skin lesions of PiCl-treated NC/Nga mice. Interestingly, the expression of iNOS was significantly increased in the skin lesions of RJ-administered mice compared with those of control PBS-administered mice. Thus, our results suggest that RJ suppresses the development of AD-like skin lesions in PiCl-treated NC/Nga mice, possibly by a combination of down-regulating TNP-specific IFN-gamma production and up-regulating iNOS expression. PMID:12890429

  11. Phonon dispersion curves of CsCN

    Indian Academy of Sciences (India)

    N K Gaur; Preeti Singh; E G Rini; Jyotsna Galgale; R K Singh

    2004-08-01

    The motivation for the present work was gained from the recent publication on phonon dispersion curves (PDCs) of CsCN from the neutron scattering technique. We have applied the extended three-body force shell model (ETSM) by incorporating the effect of coupling between the translation modes and the orientation of cyanide molecules for the description of phonon dispersion curves of CsCN between the temperatures 195 and 295 K. Our results on PDCs in symmetric direction are in good agreement with the experimental data measured with inelastic neutron scattering technique.

  12. Trajectory study of energy partition in CF 3CN → CF 3 + CN dissociation dynamics

    Science.gov (United States)

    Nyman, Gunnar; Rynefors, Kjell; Hase, William L.

    1986-12-01

    The classical trajectory method has been used to study the internal dynamics and unimolecular dissociation of CF 3CN at energies consistent with infrared multiphoton excitation conditions. A model potential energy function consisting of Morse stretches and attenuated bending terms is used in the trajectory study. At an excitation energy of 150 kcal/mol the CN K. The vibrational and rotational distributions are approximately Boltzmann. This energy partitioning is in good agreement with recent experimental results. The trajectory unimolecular rate constants and lifetime distributions for CF 3CN dissociation are consistent with intrinsic RRKM behaviour.

  13. NC10 bacteria in marine oxygen minimum zones

    DEFF Research Database (Denmark)

    Padilla, Cory; Bristow, Laura A.; Sarode, Neha;

    2016-01-01

    Bacteria of the NC10 phylum link anaerobic methane oxidation to nitrite denitrification through a unique O2-producing intra-aerobic methanotrophy pathway. A niche for NC10 in the pelagic ocean has not been confirmed. We show that NC10 bacteria are present and transcriptionally active in oceanic....... rRNA and mRNA transcripts assignable to NC10 peaked within the OMZ and included genes of the putative nitrite-dependent intra-aerobic pathway, with high representation of transcripts containing the unique motif structure of the nitric oxide (NO) reductase of NC10 bacteria, hypothesized...

  14. Excited Baryon Spectroscopy in the Large $N_c$ Limit

    CERN Document Server

    Goity, J L

    1996-01-01

    The leading in 1/N_c spin-flavor symmetry breaking mass splittings, of order N_c^0, in excited non-strange Baryons are shown to be given, up to two-body operators, by three different effective Hamiltonians: Thomas precession spin-orbit, spin-isospin tensor, and spin-orbit with isospin exchange. Explicit expressions for their matrix elements between low excited Baryons are obtained, and the structure of the mass splittings in large N_c is established to first order of perturbation theory. The problem of extending the large N_c results to the real world with N_c=3 is briefly addressed.

  15. Anomalous absorption in H2CN and CH2CN molecules

    Indian Academy of Sciences (India)

    S Chandra; S V Shinde

    2008-07-01

    Structures of H2CN and CH2CN molecules are similar to that of H2CO molecule. The H2CO has shown anomalous absorption for its transition 111 - 110 at 4.8 GHz in a number of cool molecular clouds. Though the molecules H2CN and CH2CN have been identified in TMC-1 and Sgr B2 through some transitions in ortho as well as in para species, here we have investigated the condition under which transitions 111 - 110 and 212 - 211 of these molecules may show anomalous absorption. For the present investigation, we have calculated energy levels and radiative transition probabilities. However, we have used scaled values for collisional rate coefficients. We found that relative values of collisional rate coefficients can produce the required anomalous absorption in 111 - 110 and 212 - 211 transitions in the molecules.

  16. Dynamic characteristics of NC table with SVD

    Institute of Scientific and Technical Information of China (English)

    Linhong WANG; Bo WU; Runsheng DU; Shuzi YANG

    2008-01-01

    This paper employs the SVD (singular value decomposition) method to study dynamic characteristics of a numerical control (NC) table. Acceleration signals of the NC table at three directions are tested; the singular spectrum of the signals is acquired with SVD; principal components of the signals are found out; dynamic char-acteristics of the signals and their contributing factors are studied by extracting dynamic characteristics of principal components; and signals and principal components are quantitatively analyzed by calculating signal energy. Results indicate that signal characteristics of the previous two principal components are apparent, based on which dynamic characteristics of chaotic signal can be extracted. Signal at the perpendicular direction of the table is signifi-cantly correlated with that at the horizontal motion dir-ection, which indicates that they are excited from the same vibration source. However, signals perpendicular to each other in terms of the motion direction at the horizontal level are rarely correlated; the total signal energy is max-imum at the motion direction, minimum at the horizontal non-motion direction, and medium at the perpendicular non-motion direction. Bending vibration of the lead screw at the perpendicular direction is far more violent than that at the horizontal direction.

  17. The circumstellar shell of the post-AGB star HD 56126 the $^{12}CN\\/^{13}CN$ isotope ratio and fractionation

    CERN Document Server

    Bakker, E J; Bakker, Eric J.; Lambert, David L.

    1997-01-01

    We have detected circumstellar absorption lines of the $^{12}$CN and $^{13}$CN Violet and Red System in the spectrum of the post-AGB star HD~56126. From a synthetic spectrum analysis, we derive a Doppler broadening parameter of $b=0.51\\pm0.04$ km~s$^{-1}$, $^{12}$CN/$^{13}$CN$=38\\pm2$, and a lower limit of $2000$ on $^{12}$CN/$^{14}$CN and $^{12}$C$^{14}$N/$^{12}$C$^{15}$N. A simple chemical model has been computed of the circumstellar shell surrounding HD~56126 that takes into account the gas-phase ion-molecule reaction between CN and C$^{+}$. From this we infer that this reaction leads to isotopic fractionation of CN. Taking into account the isotopic exchange reaction and the observed $^{12}$CN/$^{13}$CN we find $^{12}$C/$^{13}$C$\\sim 67$ (for $T_{\\rm kin}=25$ K). Our analysis suggests that $^{12}$CN has a somewhat higher rotational temperature than $^{13}$CN: $T_{\\rm rot}=11.5\\pm0.6$ and $8.0\\pm0.6$ K respectively. We identify possible causes for this difference in excitation temperature, among which the $...

  18. Molecular mechanisms of long ncRNAs in neurological disorders

    Directory of Open Access Journals (Sweden)

    Dubravka eVučićević

    2014-03-01

    Full Text Available Long non-coding RNAs (ncRNAs have added an unexpected layer of complexity in the regulation of gene expression. Mounting evidence now links long ncRNAs to fundamental biological processes such as development and differentiation, and recent research shows important involvement of long ncRNAs in a variety of diseases including neurodegenerative disorders, such as Parkinson’s, Alzheimer’s, spinocerebellar ataxia and Huntington’s diseases. Furthermore, long ncRNAs are speculated to be implicated in development of psychiatric disorders such as schizophrenia and bipolar disorders. Long ncRNAs contribute to these disorders in diverse ways, from regulation of transcription to modulation of RNA processing and translation. In this review, we describe the diverse mechanisms reported for long ncRNAs, and discuss how they could mechanistically be involved in the development of neurological disorders.

  19. 76 FR 49664 - Drawbridge Operation Regulation; Beaufort Channel, Beaufort, NC

    Science.gov (United States)

    2011-08-11

    ... deviation is necessary to accommodate racing participants for the ``Neuse Riverkeeper Foundation Sprint..., at Beaufort, NC. The bike route of the ``Neuse Riverkeeper Foundation Sprint Triathlon'' crosses...

  20. 复合离子镀膜技术制备Cr+Ti+TiNC/TiNC+C/DLC膜性能研究%Properties of Cr+Ti+TiNC/TiNC+C/DLC films prepared by composite ion plating

    Institute of Scientific and Technical Information of China (English)

    马胜歌; 于大洋; 杨宏伟; 张以忱

    2008-01-01

    结合中频孪生靶非平衡磁控溅射、电弧离子镀和霍尔离子源辅助沉积三种工艺,制备了Cr+Ti+TiNC/TiNC+C/DLC硬质膜.硬质膜呈深黑色,表面比较光滑,顶层为掺N的类金刚石(Diamond-like Carbon,DLC)膜,中间层为含C的TiNC,底层为含Ti和Cr的TiNC,力学性能良好.

  1. The effect of Ti(CN)/TiNb(CN) coating on erosion–corrosion resistance

    OpenAIRE

    William Aperador Chaparro; Carlos Ramírez Martín; Julio Cesar Caicedo

    2013-01-01

    The goal of this work was to study electrochemical behaviour in corrosion-erosion conditions for Ti(CN)/TiNb(CN) multilayer coatings having 1, 50, 100, 150 and 200 bilayer periods on AISI 4140 steel substrates by using a multi-target magnetron reactive sputtering device, with an r.f. source (13.56 MHz), two cylindrical magnetron cathodes and two stoichiometric TiC and Nb targets. The multi-layers were evaluated by comparing them to corrosion, erosion and erosion corrosion for a 30º impact ang...

  2. Multicomponent Interstitial Diffusion in and Thermodynamic Characteristics of the Interstitial Solid Solution ɛ-Fe3(N,C)1+ x : Nitriding and Nitrocarburizing of Pure α-Iron

    Science.gov (United States)

    Woehrle, T.; Leineweber, A.; Mittemeijer, E. J.

    2013-06-01

    A series of gas nitriding and gas nitrocarburizing experiments was performed at 823 K (550 °C) to investigate the growth kinetics of ɛ-Fe3(N,C)1+ x /γ'-Fe4N1- z -double layers on pure α-iron substrates. The growth rate and composition of the (sub)layers were determined by (sub)layer-thickness measurements using light optical microscopy and electron-probe microanalyses (EPMA), respectively. Models for the growth of bilayers into a substrate, controlled by the interstitial diffusion of two elements (N and C), were applied to the experimental data to determine the intrinsic diffusion coefficients of N and C in ɛ-Fe3(N,C)1+ x as well as the self-diffusion coefficient of N in γ'-Fe4N1- z . For ɛ-Fe3(N,C)1+ x , it was found that the four components of the diffusion matrix, D_{{NN}}^{\\varepsilon } , D_{{CC}}^{\\varepsilon } , D_{{NC}}^{\\varepsilon } and D_{{CN}}^{\\varepsilon } , are all positive. The significant values of the off-diagonal diffusivities D_{{NC}}^{\\varepsilon } and D_{{CN}}^{\\varepsilon } indicate profound interaction of both interstitial species. Thereby, additional information is obtained about the thermodynamic properties of the ɛ phase in the ternary Fe-N-C system.

  3. The CN isotopic ratios in comets

    Science.gov (United States)

    Manfroid, J.; Jehin, E.; Hutsemékers, D.; Cochran, A.; Zucconi, J.-M.; Arpigny, C.; Schulz, R.; Stüwe, J. A.; Ilyin, I.

    2009-08-01

    Our aim is to determine the isotopic ratios 12C/13C and 14N/15N in a variety of comets and link these measurements to the formation and evolution of the solar system. The 12C/13C and 14N/15N isotopic ratios are measured for the CN radical by means of high-resolution optical spectra of the R branch of the B-X (0, 0) violet band. 23 comets from different dynamical classes have been observed, sometimes at various heliocentric and nucleocentric distances, in order to estimate possible variations of the isotopic ratios in parent molecules. The 12C/13C and 14N/15N isotopic ratios in CN are remarkably constant (average values of, respectively, 91.0 ± 3.6 and 147.8 ± 5.7) within our measurement errors, for all comets whatever their origin or heliocentric distance. While the carbon isotopic ratio does agree with the terrestrial value (89), the nitrogen ratio is a factor of two lower than the terrestrial value (272), indicating a fractionation in the early solar system, or in the protosolar nebula, common to all the comets of our sample. This points towards a common origin of the comets independently of their birthplaces, and a relationship between HCN and CN. Appendices and Table [see full textsee full textsee full text] are only available in electronic form at http://www.aanda.org Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programmes ID 268.C-5570, 270.C-5043, 073.C-0525, 274.C-5015 and 075.C-0355(A).

  4. Measured appearance energies of Cn+ (3 60

    International Nuclear Information System (INIS)

    We have used mass spectrometric techniques to determine the appearance energies for the formation of small, singly charged Cn+ fragment ions (3 60 under single collision conditions. The measured appearance energies range from 79 eV (C3+) to 91 eV (C10+) and show, within the experimental error bar of ± 5 eV, little variation with the cluster size. This result is distinctly different from the behaviour of the previously measured appearance energies for the large fragment ions C58+ to C44+ and indicates that the small fragment ions are the result of a different fragmentation pathway. (author)

  5. A combined crossed molecular beams and theoretical study of the reaction CN + C{sub 2}H{sub 4}

    Energy Technology Data Exchange (ETDEWEB)

    Balucani, Nadia, E-mail: nadia.balucani@unipg.it [Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Perugia (Italy); Leonori, Francesca; Petrucci, Raffaele [Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Perugia (Italy); Wang, Xingan [Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Perugia (Italy); Department of Chemical Physics, University of Science and Technology of China, Hefei 230026 (China); Casavecchia, Piergiorgio [Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Perugia (Italy); Skouteris, Dimitrios [Scuola Normale Superiore, Pisa (Italy); Albernaz, Alessandra F. [Instituto de Física, Universidade de Brasília, Brasília (Brazil); Gargano, Ricardo [Instituto de Física, Universidade de Brasília, Brasília (Brazil); Departments of Chemistry and Physics, University of Florida, Quantum Theory Project, Gainesville, FL 32611 (United States)

    2015-03-01

    Highlights: • The CN + C{sub 2}H{sub 4} reaction was investigated in crossed beam experiments. • Electronic structure calculations of the potential energy surface were performed. • RRKM estimates qualitatively reproduce the experimental C{sub 2}H{sub 3}NC yield. - Abstract: The CN + C{sub 2}H{sub 4} reaction has been investigated experimentally, in crossed molecular beam (CMB) experiments at the collision energy of 33.4 kJ/mol, and theoretically, by electronic structure calculations of the relevant potential energy surface and Rice–Ramsperger–Kassel–Marcus (RRKM) estimates of the product branching ratio. Differently from previous CMB experiments at lower collision energies, but similarly to a high energy study, we have some indication that a second reaction channel is open at this collision energy, the characteristics of which are consistent with the channel leading to CH{sub 2}CHNC + H. The RRKM estimates using M06L electronic structure calculations qualitatively support the experimental observation of C{sub 2}H{sub 3}NC formation at this and at the higher collision energy of 42.7 kJ/mol of previous experiments.

  6. SCS-CN parameter determination using rainfall-runoff data in heterogeneous watersheds – the two-CN system approach

    Directory of Open Access Journals (Sweden)

    J. D. Valiantzas

    2012-03-01

    Full Text Available The Soil Conservation Service Curve Number (SCS-CN approach is widely used as a simple method for predicting direct runoff volume for a given rainfall event. The CN parameter values corresponding to various soil, land cover, and land management conditions can be selected from tables, but it is preferable to estimate the CN value from measured rainfall-runoff data if available. However, previous researchers indicated that the CN values calculated from measured rainfall-runoff data vary systematically with the rainfall depth. Hence, they suggested the determination of a single asymptotic CN value observed for very high rainfall depths to characterize the watersheds' runoff response. In this paper, the hypothesis that the observed correlation between the calculated CN value and the rainfall depth in a watershed reflects the effect of soils and land cover spatial variability on its hydrologic response is being tested. Based on this hypothesis, the simplified concept of a two-CN heterogeneous system is introduced to model the observed CN-rainfall variation by reducing the CN spatial variability into two classes. The behaviour of the CN-rainfall function produced by the simplified two-CN system is approached theoretically, it is analysed systematically, and it is found to be similar to the variation observed in natural watersheds. Synthetic data tests, natural watersheds examples, and detailed study of two natural experimental watersheds with known spatial heterogeneity characteristics were used to evaluate the method. The results indicate that the determination of CN values from rainfall runoff data using the proposed two-CN system approach provides reasonable accuracy and it over performs the previous methods based on the determination of a single asymptotic CN value. Although the suggested method increases the number of unknown parameters to three (instead of one, a clear physical reasoning for them is presented.

  7. Preparation and EPR characterization of N@C60 and N@C70 based peapods

    Science.gov (United States)

    Corzilius, B.; Gembus, A.; Weiden, N.; Dinse, K.-P.

    2005-09-01

    Using the quartet spin of encased nitrogen atoms as an electron paramagnetic resonance (EPR) probe, it is possible to examine the fullerene/nanotube interactions in a peapod. A purification method is developed which allows low temperature filling of nanotubes with endohedral fullerenes. The paramagnetic impurities of undoped single wall carbon nanotubes (SWNT) are characterized via EPR resulting in a broad superparamagnetic signal of the remaining catalyst particles and a rather narrow signal of carbonaceous material. Comparison of EPR spectra of several nitrogen endohedral doped peapods with their analogues obtained in a solid fullerene matrix shows a significant broadening of N@C60 and N@C70 EPR signals. This broadening is related to a non-vanishing zero-field splitting caused by deformation of the fullerene cage upon encapsulation.

  8. DRIVE AND CONTROL OF VIRTUAL-AXIS NC MACHINE TOOLS

    Institute of Scientific and Technical Information of China (English)

    1999-01-01

    The structure features and driving modes of virtual-axis NC machine tools are studied.Accor- ding to different application requirements,the three-axis control method,the five-axis control method and the six-freedom control method are put forward.These results lay a foundation for the product development of the virtual-axis NC machine tools.

  9. Advances and Future Issues for STEP-compliant NC Manufacture

    Institute of Scientific and Technical Information of China (English)

    LIU Riliang; ZHANG Chengrui; NEWMAN Stephen T

    2006-01-01

    Over the last years a new data model, known as STEP-NC, has been proposed and accepted as an international standard (ISO 14649) to replace ISO 6983 (G&M code programming). STEP-NC enables bi-directional communication of high-level geometric and manufacturing information, and provides a way of interoperable and adaptable NC manufacturing of mechanical components. This paper starts with an overview of the STEP-NC data model, provides a brief review of the global research and development activities, and tries to identify the issues and challenges for the application of the new standard and the implementation of related systems. This paper also provides a vision of the STEP-compliant NC manufacturing and the development trends of related technologies and systems, focusing on STEP-compliant CNCs.

  10. Identification of a potential superhard compound ReCN

    Energy Technology Data Exchange (ETDEWEB)

    Fan, Xiaofeng, E-mail: xffan@jlu.edu.cn [College of Materials Science and Engineering and Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun 130012 (China); Li, M.M. [College of Materials Science and Engineering and Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun 130012 (China); Singh, David J. [College of Materials Science and Engineering, Jilin University, Changchun 130012 (China); Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6056 (United States); Jiang, Qing [College of Materials Science and Engineering and Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun 130012 (China); Zheng, W.T., E-mail: wtzheng@jlu.edu.cn [College of Materials Science and Engineering and Key Laboratory of Automobile Materials of MOE, Jilin University, Changchun 130012 (China); State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012 (China)

    2015-05-15

    Highlights: • We identify a new ternary compound ReCN with theoretical calculation. • The ternary compound ReCN is with two stable structures with P63mc and P3m1. • ReCN is a semiconductor from the calculation of electronic structures. • ReCN is found to possess the outstanding mechanical properties. • ReCN may be synthesized relatively easily. - Abstract: We identify a new ternary compound, ReCN and characterize its properties including structural stability and indicators of hardness using first principles calculations. We find that there are two stable structures with space groups P63mc (HI) and P3m1 (HII), in which there are no C–C and N–N bonds. Both structures, H1 and III are elastically and dynamically stable. The electronic structures show that ReCN is a semiconductor, although the parent compounds, ReC{sub 2} and ReN{sub 2} are both metallic. ReCN is found to possess the outstanding mechanical properties with the large bulk modulus, shear modulus and excellent ideal strengths. In addition, ReCN may perhaps be synthesized relatively easily because it becomes thermodynamic stable with respect to decomposition at very low pressures.

  11. Identification of a potential superhard compound ReCN

    International Nuclear Information System (INIS)

    Highlights: • We identify a new ternary compound ReCN with theoretical calculation. • The ternary compound ReCN is with two stable structures with P63mc and P3m1. • ReCN is a semiconductor from the calculation of electronic structures. • ReCN is found to possess the outstanding mechanical properties. • ReCN may be synthesized relatively easily. - Abstract: We identify a new ternary compound, ReCN and characterize its properties including structural stability and indicators of hardness using first principles calculations. We find that there are two stable structures with space groups P63mc (HI) and P3m1 (HII), in which there are no C–C and N–N bonds. Both structures, H1 and III are elastically and dynamically stable. The electronic structures show that ReCN is a semiconductor, although the parent compounds, ReC2 and ReN2 are both metallic. ReCN is found to possess the outstanding mechanical properties with the large bulk modulus, shear modulus and excellent ideal strengths. In addition, ReCN may perhaps be synthesized relatively easily because it becomes thermodynamic stable with respect to decomposition at very low pressures

  12. Generation, spectroscopy, and structure of cyanoformyl chloride and cyanoformyl bromide, XC(O)CN.

    Science.gov (United States)

    Pasinszki, Tibor; Vass, Gábor; Klapstein, Dieter; Westwood, Nicholas P C

    2012-04-01

    Cyanoformyl chloride and cyanoformyl bromide, XC(O)CN (X = Cl and Br), have been investigated in the gas phase by UV photoelectron and mid-infrared spectroscopies. The ground-state geometries of the neutral molecules have been obtained from quantum-chemical calculations at the B3LYP and CCSD(T) levels using the aug-cc-pVTZ basis set. The individual spectroscopies provide a detailed investigation into the vibrational and electronic character of the molecules and are supported by quantum-chemical calculations. The results are compared to data for structurally and chemically related molecules.

  13. Synthesis and single-crystal structure of the pseudo-ternary compounds LiA[N(CN){sub 2}]{sub 2} (A = K or Rb)

    Energy Technology Data Exchange (ETDEWEB)

    Reckeweg, Olaf; DiSalvo, Francis J. [Cornell Univ., Ithaca, NY (United States). Baker Lab.

    2016-04-01

    Crystals of LiA[N(CN){sub 2}]{sub 2} were obtained from the reaction of LiCl and ACl (A = K or Rb) with Ag[N(CN){sub 2}] in water and subsequent evaporation of the filtered solution at 80 C under normal atmospheric conditions. Crystals of the title compound form thin rectangular plates that are transparent, colorless, and very fragile. Single-crystal structure analyses have shown that both compounds are isotypic and adopt the tetragonal space group I4/mcm (no. 140, Z = 4) with the cell parameters a = 701.53(12) and c = 1413.7(5) pm for LiK[N(CN){sub 2}]{sub 2} and a = 730.34(10) and c = 1414.4(4) pm for LiRb[N(CN){sub 2}]{sub 2}. The crystal structure is described and compared to that of the pseudo-binary alkali metal dicyanamides.

  14. B4CN3 and B3CN4 monolayers as the promising candidates for metal-free spintronic materials

    Science.gov (United States)

    Pan, Hongzhe; Sun, Yuanyuan; Zheng, Yongping; Tang, Nujiang; Du, Youwei

    2016-09-01

    The search for candidates of spintronic materials, especially among the two-dimensional (2D) materials, has attracted tremendous attentions over the past decades. By using a particle swarm optimization structure searching method combined with density functional calculations, two kinds of boron carbonitride monolayer structures (B4CN3 and B3CN4) are proposed and confirmed to be dynamically and kinetically stable. Intriguingly, we demonstrate that the magnetic ground states of the two B x C y N z systems are ferromagnetic ordering with a high Curie temperature of respectively 337 K for B4CN3 and 309 K for B3CN4. Furthermore, based on their respective band structures, the B4CN3 is found to be a bipolar magnetic semiconductor (BMS), while the B3CN4 is identified to be a type of spin gapless semiconductor (SGS), both of which are potential spintronic materials. In particular, carrier doping in the B4CN3 can induce a transition from BMS to half-metal, and its spin polarization direction is switchable depending on the doped carrier type. The BMS property of B4CN3 is very robust under an external strain or even a strong electric field. By contrast, as a SGS, the electronic structure of B3CN4 is relatively sensitive to external influences. Our findings successfully disclose two promising materials toward 2D metal-free spintronic applications.

  15. Effect of C/N ratio and salinity on power generation in compost microbial fuel cells.

    Science.gov (United States)

    Md Khudzari, Jauharah; Tartakovsky, Boris; Raghavan, G S Vijaya

    2016-02-01

    In this work, compost Microbial Fuel Cells (cMFCs) were used to generate electricity from a mix of fruit and vegetable wastes, and soil with different C/N ratios and salinities. Experiments were carried out in 500mL cMFCs equipped with carbon felt anodes and manganese dioxide cathodes. The cMFCs were loaded with fresh compost and operated at 20-23°C for up to 97days. The low C/N ratio (C/N 24) had a greater power production with a maximum power density of 5.29mW/m(2) (71.43mW/m(3)), indicating a more favorable condition for microbial growth. High-saline cMFCs produced lower power, suggesting that their level of salinity (10g/L of NaCl) inhibited electricigenic microorganisms. The closed-circuit cMFC showed an improved degradation of organic matter by 6% to 8% compared to the control MFC operated in an open circuit mode (no external resistor attached).

  16. Effect of C/N ratio and salinity on power generation in compost microbial fuel cells.

    Science.gov (United States)

    Md Khudzari, Jauharah; Tartakovsky, Boris; Raghavan, G S Vijaya

    2016-02-01

    In this work, compost Microbial Fuel Cells (cMFCs) were used to generate electricity from a mix of fruit and vegetable wastes, and soil with different C/N ratios and salinities. Experiments were carried out in 500mL cMFCs equipped with carbon felt anodes and manganese dioxide cathodes. The cMFCs were loaded with fresh compost and operated at 20-23°C for up to 97days. The low C/N ratio (C/N 24) had a greater power production with a maximum power density of 5.29mW/m(2) (71.43mW/m(3)), indicating a more favorable condition for microbial growth. High-saline cMFCs produced lower power, suggesting that their level of salinity (10g/L of NaCl) inhibited electricigenic microorganisms. The closed-circuit cMFC showed an improved degradation of organic matter by 6% to 8% compared to the control MFC operated in an open circuit mode (no external resistor attached). PMID:26611399

  17. On pseudorandom generators in NC0

    DEFF Research Database (Denmark)

    Cryan, Mary; Miltersen, Peter Bro

    2001-01-01

    In this paper we consider the question of whether NC 0 circuits can generate pseudorandom distributions. While we leave the general question unanswered, we show – • Generators computed by NC 0 circuits where each output bit depends on at most 3 input bits (i.e, DNC 3 0 circuits) and with stretch....... – • There is an NC 4 0 generator with a super-linear stretch that passes the linear dependency test as well as k-wise independence tests, for any constant k....

  18. Non-leptonic kaon decays at large $N_c$

    CERN Document Server

    Donini, A; Pena, C; Romero-López, F

    2016-01-01

    We study the scaling with the number of colours, $N_c$, of the weak amplitudes mediating kaon mixing and decay. We evaluate the amplitudes of the two relevant current-current operators on the lattice for $N_c=3-7$. We conclude that the subleading $1/N_c$ corrections in $\\hat{B}_K$ are small, but those in the $K \\rightarrow \\pi\\pi$ amplitudes are large and fully anti-correlated in the $I=0, 2$ isospin channels. We briefly comment on the implications for the $\\Delta I=1/2$ rule.

  19. Lattice study of large $N_c$ QCD

    CERN Document Server

    DeGrand, Thomas

    2016-01-01

    We present a lattice simulation study of large $N_c$ regularities of meson and baryon spectroscopy in $SU(N_c)$ gauge theory with two flavors of dynamical fundamental representation fermions. Systems investigated include $N_c=2$, 3, 4, and 5, over a range of fermion masses parametrized by a squared pseudoscalar to vector meson mass ratio between about 0.2 to 0.7. Good agreement with large $N_c$ scaling is observed in the static potential, in meson masses and decay constants, and in baryon spectroscopy.

  20. SOME REMARKS ON HOLOMORPHIC FUNCTIONS AND TAYLOR SERIES IN Cn

    Institute of Scientific and Technical Information of China (English)

    Yu Jiarong

    2008-01-01

    Some previous results on convergence of Taylor series in Cn [3] are improved by indicating outside the domain of convergence the points where the series diverges and simplifying some proofs. These results contain the Cauchy-Hadamard theorem in C. Some Cauchy integral formulas of a holomorphic function on a closed ball in Cn are constructed and the Taylor series expansion is deduced.

  1. EST Table: CN212020 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN212020 rzhswab0_002434 11/12/09 n.h 10/09/28 low homology 10/09/01 low homology 1...0/08/28 n.h 10/09/10 low homology 10/09/10 low homology 10/09/10 low homology CN212020 L12 ...

  2. EST Table: CN211821 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN211821 rzhswab0_006514 11/12/09 n.h 10/09/28 62 %/161 aa ref|XP_969343.1| PREDICT...|Amel|GB11559-PA 10/09/10 62 %/161 aa gi|91086147|ref|XP_969343.1| PREDICTED: similar to CG1972 CG1972-PA [Tribolium castaneum] CN211821 L12 ...

  3. Large Nc from Seiberg-Witten curve and localization

    Science.gov (United States)

    Russo, Jorge G.

    2015-09-01

    When N = 2 gauge theories are compactified on S4, the large Nc limit then selects a unique vacuum of the theory determined by saddle-point equations, which remains determined even in the flat-theory limit. We show that exactly the same equations can be reproduced purely from Seiberg-Witten theory, describing a vacuum where magnetically charged particles become massless, and corresponding to a specific degenerating limit of the Seiberg-Witten spectral curve where 2Nc - 2 branch points join pairwise giving aDn = 0, n = 1 , … ,Nc - 1. We consider the specific case of N = 2 SU (Nc) SQCD coupled with 2Nf massive fundamental flavors. We show that the theory exhibits a quantum phase transition where the critical point describes a particular Argyres-Douglas point of the Riemann surface.

  4. 78 FR 49317 - North Carolina Disaster # NC-00054

    Science.gov (United States)

    2013-08-13

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION North Carolina Disaster NC-00054 AGENCY: U.S. Small Business Administration. ACTION: Notice.... Small Business Administration, Processing And Disbursement Center, 14925 Kingsport Road, Fort Worth,...

  5. Research on Visual Virtual Design Platform for NC Machine Tools

    Institute of Scientific and Technical Information of China (English)

    HU Rufu; CHEN Xiaoping; SUN Qinghong

    2006-01-01

    The fundamental ideas on building the collaborative design platform of virtual visualization for NC machine tools are introduced. The platform is based on the globally shared product model conforming to the STEP Standard, and used PDM system to integrate and encapsulate CAD/CAE and other application software for the product development. The platform also integrated the expert system of NC machine tools design, analysis and estimation. This expert system utilized fuzzy estimation principle to evaluate the design and simulation analysis results and make decisions. The platform provides the collaborative intelligent environment for the design of virtual NC machine tools prototype aiming at integrated product design team. It also supports the customized development of NC machine tools.

  6. Observations of NC stop nets for bottlenose dolphin takes

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — To observe the NC stop net fishery to document the entanglement of bottlenose dolphins and movement of dolphins around the nets.

  7. Dynamic characteristics of an NC table with phase space reconstruction

    Institute of Scientific and Technical Information of China (English)

    Linhong WANG; Bo WU; Runsheng DU; Shuzi YANG

    2009-01-01

    The dynamic properties of a numerical control (NC) table directly interfere with the accuracy and surface quality of work pieces machined by a computer numerical control (CNC) machine. Phase space reconstruction is an effective approach for researching dynamic behaviors of a system with measured time series. Based on the theory and method for phase space reconstruction, the correlation dimension, maximum Lyapunov exponent, and dynamic time series measured from the NC table were analyzed. The characteristic quantities such as the power spectrum, phase trajectories, correlation dimension, and maximum Lyapunov exponent are extracted from the measured time series. The chaotic characteristic of the dynamic properties of the NC table is revealed via various approaches.Therefore, an NC table is a nonlinear dynamic system. This research establishes a basis for dynamic system discrimi-nation of a CNC machine.

  8. Synthesis, thermolysis, and sensitivities of HMX/NC energetic nanocomposites.

    Science.gov (United States)

    Wang, Yi; Song, Xiaolan; Song, Dan; Liang, Li; An, Chongwei; Wang, Jingyu

    2016-07-15

    1,3,5,7-Tetranittro-1,3,5,7-tetrazocane/nitrocellulose (HMX/NC) nanocomposites were successfully synthesized by an improved sol-gel-supercritical method. NC nanoparticles with a size of ∼30nm were cross-linked to form a network structure, and HMX nanoparticles were imbedded in the nano-NC matrix. The key factors, i.e., the selection of catalyst and solvent, were probed. No phase transformation of the HMX occurred before or after fabrication, and the molecular structures of the HMX and NC did not change. Thermal analyses were performed, and the kinetic and thermodynamic parameters, such as activation energy (EK), per-exponent factor (lnAK), rate constant (k), activation heat (ΔH(≠)), activation free energy (ΔG(≠)), activation entropy (ΔS(≠)), critical temperature of thermal explosion (Tb), and critical heating rate of thermal explosion (dT/dt)Tb, were calculated. The results indicate that HMX/NC presented a much lower activation energy (165.03kJ/mol) than raw HMX (282.5kJ/mol) or raw NC (175.51kJ/mol). The chemical potential (ΔG(≠)) for the thermal decomposition of HMX/NC has a positive value, which means that the activation of the molecules would not proceed spontaneously. The significantly lower ΔH(≠) value of HMX/NC, which represents the heat needed to be absorbed by an explosive molecule to change it from its initial state to an activated state, implies that the molecules of HMX/NC are much easier to be activated than those of raw HMX. Similarly, the HMX/NC presented a much lower Tb (168.2°C) than raw HMX (283.2°C). From the results of the sensitivity tests, the impact and friction sensitivities of HMX/NC were significantly decreased compared with those of raw HMX, but the thermal sensitivity was distinctly higher. The activation of the particles under external stimulation was simulated, and the mechanism was found to be crucial. Combining the thermodynamic parameters, the mechanism as determined from the results of the sensitivity tests was

  9. Nanomechanical properties of TiCN and TiCN/Ti coatings on Ti prepared by Filtered Arc Deposition

    Energy Technology Data Exchange (ETDEWEB)

    Sun, Yong [School of Mechanical, Materials & Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522 (Australia); Lu, Cheng, E-mail: chenglu@uow.edu.au [School of Mechanical, Materials & Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522 (Australia); Yu, Hailiang [School of Mechanical, Materials & Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522 (Australia); School of Mechanical Engineering, Shenyang University, Shenyang 110044 (China); Kiet Tieu, A.; Su, Lihong; Zhao, Yue; Zhu, Hongtao [School of Mechanical, Materials & Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522 (Australia); Kong, Charlie [Electron Microscope Unit, University of New South Wales, Sydney, NSW 2052 (Australia)

    2015-02-11

    Monolayer TiCN and multilayer TiCN/Ti coatings were deposited on the surface of Ti using the Filtered Arc Deposition System (FADS). Nanoindentation tests were performed on both coatings. The multilayer TiCN/Ti coating exhibited better ductility than the monolayer TiCN coating. The lattice constants of the coatings were characterized by X-ray diffraction. Transmission Electron Microscopy (TEM) was used to investigate the fracture behavior of the coatings. Inter-columnar, inclined and lateral cracks were found to be the dominant crack modes in the monolayer TiCN coatings while small bending crack and radial crack were the dominant crack modes in the multilayer TiCN/Ti coatings. The Finite Element Method (FEM) was used to simulate the indentation process. It was found that the Ti interlayer in the multilayer TiCN/Ti coating could efficiently suppress the fracture, which is responsible for the improved ductility of the multilayer TiCN/Ti coating.

  10. Nanomechanical properties of TiCN and TiCN/Ti coatings on Ti prepared by Filtered Arc Deposition

    International Nuclear Information System (INIS)

    Monolayer TiCN and multilayer TiCN/Ti coatings were deposited on the surface of Ti using the Filtered Arc Deposition System (FADS). Nanoindentation tests were performed on both coatings. The multilayer TiCN/Ti coating exhibited better ductility than the monolayer TiCN coating. The lattice constants of the coatings were characterized by X-ray diffraction. Transmission Electron Microscopy (TEM) was used to investigate the fracture behavior of the coatings. Inter-columnar, inclined and lateral cracks were found to be the dominant crack modes in the monolayer TiCN coatings while small bending crack and radial crack were the dominant crack modes in the multilayer TiCN/Ti coatings. The Finite Element Method (FEM) was used to simulate the indentation process. It was found that the Ti interlayer in the multilayer TiCN/Ti coating could efficiently suppress the fracture, which is responsible for the improved ductility of the multilayer TiCN/Ti coating

  11. precision deburring using NC and robot equipment. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Gillespie, L.K.

    1980-05-01

    Deburring precision miniature components is often time consuming and inconsistent. Although robots are available for deburring parts, they are not precise enough for precision miniature parts. Numerical control (NC) machining can provide edge break consistencies to meet requirements such as 76.2-..mu..m maximum edge break (chamfer). Although NC machining has a number of technical limitations which prohibits its use on many geometries, it can be an effective approach to features that are particularly difficult to deburr.

  12. Nonlinear Absorption Properties of nc-Si:H Thin Films

    Institute of Scientific and Technical Information of China (English)

    GUO Zhenning; GUO Hengqun; LI Shichen; HUANG Yongzhen; WANG Qiming

    2001-01-01

    It is reported in this paper that the phenomenon of the saturated absorption of the exciton in hydrogenated nanocrystalline silicon (nc-Si:H) thin film fabricated by plasma enhanced chemical vapor deposition (PECVD) without any post-processing is observed at room temperature using pump-probe technology. This nonlinear optical absorption property is induced by the surface effect of the silicon nanoparticles in nc-Si:H thin films.

  13. Vanishing chiral couplings in the large-Nc resonance theory

    OpenAIRE

    Portolés, Jorge; Rosell, Ignasi; Ruiz Femenía, Pedro

    2007-01-01

    The construction of a resonance theory involving hadrons requires implementing the information from higher scales into the couplings of the effective Lagrangian. We consider the large-Nc chiral resonance theory incorporating scalars and pseudoscalars, and we find that, by imposing LO short-distance constraints on form factors of QCD currents constructed within this theory, the chiral low-energy constants satisfy resonance saturation at NLO in the 1/Nc expansion.

  14. Nc-Si Thin Film Deposited at Low Temperature and Nc-Si Heterojunction Solar Cell

    Institute of Scientific and Technical Information of China (English)

    赵占霞; 崔容强; 孟凡英; 于化丛; 周之斌

    2004-01-01

    This paper reported some results about intrinsic nanocrystalline silicon thin films deposited by high frequency (HF) sputtering on p-type c-Si substrates at low temperature. Samples were examined by atomic force microscopy (AFM), X-ray diffraction (XRD), infrared absorption, and ellipsometry. XRD measurements show that this film has a new microstructure, which is different from the films deposited by other methods. The ellipsometry result gives that the optical band gap of the film is about 2.63 eV. In addition, the n-type nc-Si ∶ H/p-type c-Si heterojunction solar cell, which has open circuit voltage (Uoc) of 558 mV and short circuit current intensity (Isc) of 29 mA/cm2, was obtained based on the nanocrystalline silicon thin film. Irradiated under AM1.5, 100 mW/cm2 light intensity, the Uoc, Isc, and FF can keep stable for 10 h.

  15. CN Variations in High Metallicity Globular and Open Clusters

    OpenAIRE

    Martell, Sarah L.; Smith, Graeme H.

    2009-01-01

    We present a comparison of CN bandstrength variations in the high-metallicity globular clusters NGC 6356 and NGC 6528 with those measured in the old open clusters NGC 188, NCG 2158 and NGC 7789. Star-to-star abundance variations, of which CN differences are a readily observable sign, are commonplace in moderate-metallicity halo globular clusters but are unseen in the field or in open clusters. We find that the open clusters have narrow, unimodal distributions of CN bandstrength, as expected f...

  16. CN Bimodality at Low Metallicity: The Globular Cluster M53

    CERN Document Server

    Martell, Sarah L; Briley, Michael M

    2007-01-01

    We present low resolution UV-blue spectroscopic observations of red giant stars in the globular cluster M53 ([Fe/H]=-1.84), obtained to study primordial abundance variations and deep mixing via the CN and CH absorption bands. The metallicity of M53 makes it an attractive target: a bimodal distribution of 3883 angstrom CN bandstrength is common in moderate- and high-metallicity globular clusters ([Fe/H] > -1.6) but unusual in those of lower metallicity ([Fe/H] < -2.0). We find that M53 is an intermediate case, and has a broad but not strongly bimodal distribution of CN bandstrength, with CN and CH bandstrengths anticorrelated in the less-evolved stars. Like many other globular clusters, M53 also exhibits a general decline in CH bandstrength and [C/Fe] abundance with rising luminosity on the red giant branch.

  17. CN Variations in High Metallicity Globular and Open Clusters

    CERN Document Server

    Martell, Sarah L

    2009-01-01

    We present a comparison of CN bandstrength variations in the high-metallicity globular clusters NGC 6356 and NGC 6528 with those measured in the old open clusters NGC 188, NCG 2158 and NGC 7789. Star-to-star abundance variations, of which CN differences are a readily observable sign, are commonplace in moderate-metallicity halo globular clusters but are unseen in the field or in open clusters. We find that the open clusters have narrow, unimodal distributions of CN bandstrength, as expected from the literature, while the globular clusters have broad, bimodal distributions of CN bandstrength, similar to moderate-metallicity halo globular clusters. This result has interesting implications for the various mechanisms proposed to explain the origin of globular cluster abundance inhomogeneities, and suggests that the local environment at the epoch of cluster formation plays a vital role in regulating intracluster enrichment processes.

  18. DIMERIC AND MONOMERIC CHROMIUM(II) AND MONOMERIC CHROMIUM(III) ARYLS - CRYSTAL-STRUCTURE OF PYRAMIDAL MZ2CR(PY) (MZ = ORTHO-ME2NCH2C6H4, PY = PYRIDINE), DIMERIC [(ME2NC6H4)2CR]2, AND OCTAHEDRAL (ME2NC6H4)3CR

    NARCIS (Netherlands)

    EDEMA, JJH; GAMBAROTTA, S; MEETSMA, A; SPEK, AL

    1992-01-01

    Reaction of CrCl2(THF)2 with 2 equiv of [omicron-Me2NCH2C6H4]Li and [omicron-Me2NC6H4]Li led to formation of the monomeric pyramidal [omicron-Me2NCH2C6H4]2Cr(pyridine) (2) and dimeric [(omicron-Me2NC6H4)2Cr]2 (3) with a supershort Cr-Cr contact. Both compounds can be thermolyzed in toluene to form t

  19. Crossed beam reaction of cyano radicals with hydrocarbon molecules. I. Chemical dynamics of cyanobenzene (C6H5CN; X 1A1) and perdeutero cyanobenzene (C6D5CN; X 1A1) formation from reaction of CN(X 2Σ+) with benzene C6H6(X 1A1g), and d6-benzene C6D6(X 1A1g)

    Science.gov (United States)

    Balucani, N.; Asvany, O.; Chang, A. H. H.; Lin, S. H.; Lee, Y. T.; Kaiser, R. I.; Bettinger, H. F.; Schleyer, P. v. R.; Schaefer, H. F.

    1999-10-01

    The chemical reaction dynamics to form cyanobenzene C6H5CN(X 1A1), and perdeutero cyanobenzene C6D5CN(X 1A1) via the neutral-neutral reaction of the cyano radical CN(X 2Σ+), with benzene C6H6(X 1A1g) and perdeutero benzene C6D6(X 1A1g), were investigated in crossed molecular beam experiments at collision energies between 19.5 and 34.4 kJ mol-1. The laboratory angular distributions and time-of-flight spectra of the products were recorded at mass to charge ratios m/e=103-98 and 108-98, respectively. Forward-convolution fitting of our experimental data together with electronic structure calculations (B3LYP/6-311+G**) indicate that the reaction is without entrance barrier and governed by an initial attack of the CN radical on the carbon side to the aromatic π electron density of the benzene molecule to form a Cs symmetric C6H6CN(C6D6CN) complex. At all collision energies, the center-of-mass angular distributions are forward-backward symmetric and peak at π/2. This shape documents that the decomposing intermediate has a lifetime longer than its rotational period. The H/D atom is emitted almost perpendicular to the C6H5CN plane, giving preferentially sideways scattering. This experimental finding can be rationalized in light of the electronic structure calculations depicting a H-C-C angle of 101.2° in the exit transition state. The latter is found to be tight and located about 32.8 kJ mol-1 above the products. Our experimentally determined reaction exothermicity of 80-95 kJ mol-1 is in good agreement with the theoretically calculated one of 94.6 kJ mol-1. Neither the C6H6CN adduct nor the stable iso cyanobenzene isomer C6H5NC were found to contribute to the scattering signal. The experimental identification of cyanobenzene gives a strong background for the title reaction to be included with more confidence in reaction networks modeling the chemistry in dark, molecular clouds, outflow of dying carbon stars, hot molecular cores, as well as the atmosphere of hydrocarbon

  20. Eikonal gluon radiation at finite-Nc beyond 2 loops

    CERN Document Server

    Khelifa-Kerfa, Kamel

    2015-01-01

    We present first calculations of QCD matrix-elements in perturbation theory at finite Nc beyond 2 loops in the eikonal approximation for e+ e- annihilation processes. For the emission of n soft energy-ordered gluons we solve both the colour and kinematic structures at a given order in perturbation theory by means of a Mathematica program that relies solely on a recently developed Mathematica code, ColorMath, that evaluates the trace of products of colour matrices. At large Nc, our squared amplitudes reduce to those already known in the literature.

  1. Shear viscosity from a large-Nc NJL model

    International Nuclear Information System (INIS)

    We investigate the shear viscosity to entropy ratio within the vicinity of the chiral phase transition/crossover using the NJL model in a large-Nc expansion. As heavy-ion collisions at RHIC and LHC in combination with hydrodynamic simulations suggest, this ratio is close to the AdS/CFT benchmark. This indicates a strongly correlated state of matter produced in such collisions. We study in detail the non-perturbative structure of the NJL model and the question if resummation techniques are required. In the large-Nc expansion next-to-leading-order contributions to the shear viscosity are derived.

  2. O(Nc) and USp(Nc) QCD from String Theory

    Science.gov (United States)

    Imoto, T.; Sakai, T.; Sugimoto, S.

    2009-12-01

    We propose a holographic dual of large N_c quantum chromodynamics (QCD) with the gauge groups O(N_c) and USp(N_c) and N_f flavors of massless quarks. This is constructed by adding O6-planes to an intersecting D4-D8 system in type IIA superstring theory. The holographic dual description is formulated in Witten's D4-brane background with D8-branes and O6-planes embedded in it as probes. The D4-brane background gives rise to a smooth interpolation of D8-overline{D8} pairs and an O6-overline{O6} pair. We show that the resultant brane configuration explains geometrically the flavor symmetry breaking patterns in O(N_c) and USp(N_c) QCD, which are caused by quark bilinear condensates. We next discuss that baryons can be realized as D4-overline{D4} pairs wrapped on S^4, which intersect with the O6-plane. By analyzing the tachyons on it, we reproduce the stability conditions of the baryons that are expected from the gauge theory viewpoint . The stable baryon configurations are classified systematically using K-theory. We also give a similar analysis of the flux tubes and again reproduce the results that are consistent with QCD.

  3. Highly conducting and preferred oriented boron doped nc-Si films for window layers in nc-Si solar cells

    Science.gov (United States)

    Mondal, Praloy; Das, Debajyoti

    2016-05-01

    Growth and optimization of the boron dopednanocrystalline silicon (nc-Si) films have been studied by varyingthe gaspressure applied to the hydrogendiluted silane plasma in RF (13.56 MHz) plasma-enhanced chemical vapor deposition (PECVD) system, using diborane (B2H6) as the dopant gas. High magnitudeof electrical conductivity (~102 S cm-1) andorientedcrystallographic lattice planes have been obtained with high crystalline volume fraction (~86 %) at an optimum pressure of 2.5 Torr. XRD and Raman studies reveal good crystallinity with preferred orientation, suitable for applications in stacked layer devices, particularly in nc-Si solar cells.

  4. 75 FR 65389 - North Carolina Disaster #NC-00030

    Science.gov (United States)

    2010-10-22

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION North Carolina Disaster NC-00030 AGENCY: U.S. Small Business Administration. ACTION: Notice... Carolina (FEMA-1942-DR), dated 10/14/ 2010. Incident: Severe storms, flooding, and straight-line...

  5. 78 FR 12806 - North Carolina Disaster #NC-00048

    Science.gov (United States)

    2013-02-25

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION North Carolina Disaster NC-00048 AGENCY: U.S. Small Business Administration. ACTION: Notice... INFORMATION CONTACT: A. Escobar, Office of Disaster Assistance, U.S. Small Business Administration, 409...

  6. 77 FR 56250 - North Carolina Disaster #NC-00044

    Science.gov (United States)

    2012-09-12

    ... From the Federal Register Online via the Government Publishing Office SMALL BUSINESS ADMINISTRATION North Carolina Disaster NC-00044 AGENCY: U.S. Small Business Administration. ACTION: Notice... Deadline Date: 06/05/2013. ADDRESSES: Submit completed loan applications to: U.S. Small...

  7. 77 FR 33997 - Television Broadcasting Services; Greenville, NC

    Science.gov (United States)

    2012-06-08

    ... COMMISSION 47 CFR Part 73 Television Broadcasting Services; Greenville, NC AGENCY: Federal Communications... Commission instituted a freeze on the acceptance of rulemaking petitions by full power television stations... petitions for rulemaking filed by full power television stations seeking to relocate from channel...

  8. 77 FR 46631 - Television Broadcasting Services; Greenville, NC

    Science.gov (United States)

    2012-08-06

    ... COMMISSION 47 CFR Part 73 Television Broadcasting Services; Greenville, NC AGENCY: Federal Communications... instituted a freeze on the acceptance of full power television rulemaking petitions requesting channel... 5 U.S.C. 801(a)(1)(A). List of Subjects in 47 CFR Part 73 Television. Federal...

  9. 78 FR 72009 - Establishment of Class E Airspace; Star, NC

    Science.gov (United States)

    2013-12-02

    ... Federal Register a notice of proposed rulemaking to establish Class E airspace at Star, NC (78 FR 54413... Policies and Procedures (44 FR 11034; February 26, 1979); and (3) does not warrant preparation of a... continues to read as follows: Authority: 49 U.S.C. 106(g); 40103, 40113, 40120; E.O. 10854, 24 FR 9565,...

  10. 76 FR 38018 - Safety Zone, Newport River; Morehead City, NC

    Science.gov (United States)

    2011-06-29

    ... standards are technical standards (e.g., specifications of materials, performance, design, or operation... in the Federal Register (33 FR 165). We received no comments on the proposed rule. No public meeting... Transportation awarded a contract to Astron General Contracting Company of Jacksonville, NC to perform...

  11. Solution-Processed, Ultrathin Solar Cells from CdCl3(-)-Capped CdTe Nanocrystals: The Multiple Roles of CdCl3(-) Ligands.

    Science.gov (United States)

    Zhang, Hao; Kurley, J Matthew; Russell, Jake C; Jang, Jaeyoung; Talapin, Dmitri V

    2016-06-22

    Solution-processed CdTe solar cells using CdTe nanocrystal (NC) ink may offer an economically viable route for large-scale manufacturing. Here we design a new CdCl3(-)-capped CdTe NC ink by taking advantage of novel surface chemistry. In this ink, CdCl3(-) ligands act as surface ligands, sintering promoters, and dopants. Our solution chemistry allows obtaining very thin continuous layers of high-quality CdTe which is challenging for traditional vapor transport methods. Using benign solvents, in air, and without additional CdCl2 treatment, we obtain a well-sintered CdTe absorber layer from the new ink and demonstrate thin-film solar cells with power conversion efficiency over 10%, a record efficiency for sub-400 nm thick CdTe absorber layer. PMID:27269672

  12. The biodistribution of NC100668 and the effect of excess NC100668 on the biodistribution and kidney retention of {sup 99m}Tc-NC100668 in the rat

    Energy Technology Data Exchange (ETDEWEB)

    Edwards, David [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom)]. E-mail: davidedwards@ge.com; Lewis, Joanne [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Battle, Mark [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Lear, Rochelle [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Farrar, Gill [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Barnett, David J. [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Godden, Vanessa [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Edwards, Catherine [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Oliveira, Alexandra [Research and Development, GE Healthcare Bio-Sciences, Grove Centre, HP7 9LL Amersham (United Kingdom); Ahlstroem, Hakan [Institution of Oncology, Radiology and Clinical Immunology, Section of Radiology, Uppsala University Hospital, SE-751 85 Uppsala (Sweden)

    2007-04-15

    Introduction: {sup 99m}Tc-NC100668 is being developed to aid the diagnosis of thromboemboli. The purpose of this study was to investigate if the presence of excess NC100668 interferes with the biodistribution and blood clot uptake of {sup 99m}Tc-NC100668. The secondary aim was to investigate the causes underlying the kidney retention of {sup 99m}Tc-NC100668. Methods: The uptake of a {sup 14}C-labelled analogue of NC100668, as well as {sup 99m}Tc-NC100668, into plasma (in vitro) and blood (in vivo) clots was determined. The biodistribution of {sup 99m}Tc-NC100668 at a range of NC100668 doses was studied in normal Wistar rats and those bearing experimentally induced deep venous thrombosis. The biodistribution of a negative control peptide and {sup 99m}Tc-NC100668 plus L-lysine was studied in healthy male Wistar rats. Results: The biodistribution as well as plasma clot uptake of [Asn-U-{sup 14}C]NC100668 and {sup 99m}Tc-NC100668 was similar. Apart from some reduction in kidney retention, the biodistribution and uptake of radioactivity into the blood clot were not significantly affected by the presence of up to 1000 times the clinical dose of NC100668. Kidney retention of radioactivity could be more effectively reduced by coadministration of 889 {mu}g/kg NC100668 than 450 mg/kg L-lysine. A negative control peptide with no affinity for FXIIIa demonstrated very little kidney retention. Conclusions: The biodistribution and blood clot uptake of {sup 99m}Tc-NC100668 and [Asn-U-{sup 14}C]NC100668 are similar. With the exception of the kidneys, {sup 99m}Tc-NC100668 biodistribution and blood clot uptake are unaffected by the presence of unlabelled NC100668. The kidney retention of radioactivity is probably due to transglutaminase activity and, to a lesser extent, nonspecific charge-mediated endocytosis.

  13. Low temperature synthesis of SiCN nanostructures

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Silicon carbon nitride (SiCN) nanowires, nanorods and nanotubes have gained much attention due to their excellent field emission and photoluminescence properties. These nanostructures were usually grown using catalysts at high temperature (800―1000℃). In this paper, synthesis of SiCN nanostruc-tures at a temperature less than 500℃ is reported. Various kinds of SiCN nanostructures were synthe-sized using microwave plasma chemical vapor deposition method. Gas mixtures of CH4, H2 and N2 were used as precursors and Si chips were inserted in the sample holder at symmetrical positions around the specimen as additional Si sources. Metallic gallium was used as the liquid medium in a mechanism similar to vapor-liquid-solid. Morphologies of the resultant were characterized by field emission scan-ning electron microscopy. Energy dispersive spectrometry and X-ray photoelectron spectroscopy were used to characterize their compositions and bonding states.

  14. Electron densities and the excitation of CN in molecular clouds

    Science.gov (United States)

    Black, John H.; Van Dishoeck, Ewine F.

    1991-01-01

    In molecular clouds of modest density and relatively high fractional ionization, the rotational excitation of CN is controlled by a competition among electron impact, neutral impact and the interaction with the cosmic background radiation. The degree of excitation can be measured through optical absorption lines and millimeter-wave emission lines. The available, accurate data on CN in diffuse and translucent molecular clouds are assembled and used to determine electron densities. The derived values, n(e) = roughly 0.02 - 0.5/cu cm, imply modest neutral densities, which generally agree well with determinations by other techniques. The absorption- and emission-line measurements of CN both exclude densities higher than n(H2) = roughly 10 exp 3.5/cu cm on scales varying from 0.001 to 60 arcsec in these clouds.

  15. Low temperature synthesis of SiCN nanostructures

    Institute of Scientific and Technical Information of China (English)

    CHENG Wen Juan; MA XueMing

    2009-01-01

    Silicon carbon nitride (SiCN) nanowires, nanorods and nanotubes have gained much attention due to their excellent field emission and photoluminescence properties. These nanostructures were usually grown using catalysts at high temperature (800-1000℃). In this paper, synthesis of SiCN nanostruc-tures at a temperature less than 500℃ is reported. Various kinds of SiCN nanostructures were synthe-sized using microwave plasma chemical vapor deposition method. Gas mixtures of CH4, H2 and N2 were used as precursors and Si chips were inserted in the sample holder at symmetrical positions around the specimen as additional Si sources. Metallic gallium was used as the liquid medium in a mechanism similar to vapor-liquid-solid. Morphologies of the resultant were characterized by field emission scan-ning electron microscopy. Energy dispersive spectrometry and X-ray photoelectron spectroscopy were used to characterize their compositions and bonding states.

  16. CN Bimodality at Low Metallicity: The Globular Cluster M53

    OpenAIRE

    Martell, Sarah L.; Smith, Graeme H.; Briley, Michael M.

    2007-01-01

    We present low resolution UV-blue spectroscopic observations of red giant stars in the globular cluster M53 ([Fe/H]=-1.84), obtained to study primordial abundance variations and deep mixing via the CN and CH absorption bands. The metallicity of M53 makes it an attractive target: a bimodal distribution of 3883 angstrom CN bandstrength is common in moderate- and high-metallicity globular clusters ([Fe/H] > -1.6) but unusual in those of lower metallicity ([Fe/H] < -2.0). We find that M53 is an i...

  17. On Levi-flat hypersurfaces with given boundary in Cn

    Institute of Scientific and Technical Information of China (English)

    Pierre DOLBEAULT

    2008-01-01

    Let S Cn be a compact connected 2-codimensional submanifold.If n ≥ 3,essentially local conditions and the assumption: every complex point of S is elliptic imply the existence of a projection in Cn of a Levi-flat (2n - 1)-subvariety whose boundary is S (Dolbeault,Tomassini,Zaitsev,2005).We extend the result when S is homeomorphic to a sphere and has one hyperbolic point.For n = 2 many results are known since the 1980's and a new result with a very technical hypothesis is announced.

  18. New topology of CN-bridged clusters: dodecanuclear face-sharing defective cubes based on octacyanometallates(iv) and nickel(ii) with diimine ligands.

    Science.gov (United States)

    Nowicka, Beata; Näther, Christian; Halemba, Alexandra; Reczyński, Mateusz; Sieklucka, Barbara

    2015-07-28

    New dodecanuclear bimetallic Ni8M4 clusters were obtained in the reaction between octacyanometallates(IV), nickel(II) cations and diimine ligands. {[Ni(LL)(H2O)]2[Ni(LL)(H2O)2]6[M(CN)8]4} assemblies, where LL = 1,10-phenanthroline M = Mo, (1) or LL = 2,2′-bipyridine M = W (2) or Mo (3), are among the largest octacyanometallate-based clusters. They show the same compact topology of the cluster core, which can be described as defective face-sharing cubes with corners defined by alternating metal centres. The structures are stabilised by π–π interactions between aromatic rings of diimine ligands and hydrogen bonds connecting terminal CN groups and coordinated H2O molecules through a crystallisation solvent. Different decorating ligands cause different arrangements of clusters in the crystal structure. 1 crystallises in the triclinic system space group P, while 2 and 3 crystallise in the monoclinic system space group P21/n. The clusters show paramagnetic behaviour with weak antiferromagnetic interactions between the NiII centres through diamagnetic NC-MIV-CN linkages. PMID:26091544

  19. Reanalysis of UHS Cofrentes; Reanalisis del UHS de CN Cofrentes

    Energy Technology Data Exchange (ETDEWEB)

    Rodriguez Garcia, G. M.; Arteaga Sualdea, M. A.; Rebollo Garcia, C.; Mota coloma, M.

    2012-07-01

    The purpose of the reanalysis of the UHS is to revalue the cooling flow required for each changer ESW NC Cofrentes, to evacuate thermal loads their H / X, giving credit to lower water temperature UHS reservoir (heat sink ), maintaining the same heat exchange capacity in all H / X.

  20. SbCl5—wet acetonitrile: a new system for chemoselective O-desilylation

    OpenAIRE

    Glória, Paulo M. C.; Prabhakar, Sundaresan; Lobo, Ana M; Gomes, Mário

    2003-01-01

    Abstract—A new efficient method for deprotection of TBDMS derivatives of phenols, primary alcohols, carboxylic acids and secondary amines, consisting of SbCl5 and MeCN with 0.1% water (w/v), is reported. It effects inter alia desilylation of a CH2OTBDMS group in the presence of a ketal function.

  1. Topics on heavy baryon chiral perturbation theory in the large N_c limit

    CERN Document Server

    Flores-Mendieta, R

    2002-01-01

    We compute nonanalytical pion-loop corrections to baryon masses in a combined expansion in chiral symmetry breaking and 1/N_c, where N_c is the number of colors. Specifically, we compute flavor-27 baryon mass splittings at leading order in chiral perturbation theory. Our results, at the physical value N_c=3, are compared with the expressions obtained in heavy baryon chiral perturbation theory with no 1/N_c expansion.

  2. Controlling pyridinic, pyrrolic, graphitic, and molecular nitrogen in multi-wall carbon nanotubes using precursors with different N/C ratios in aerosol assisted chemical vapor deposition.

    Science.gov (United States)

    Bulusheva, L G; Okotrub, A V; Fedoseeva, Yu V; Kurenya, A G; Asanov, I P; Vilkov, O Y; Koós, A A; Grobert, N

    2015-10-01

    Nitrogen-containing multi-wall carbon nanotubes (N-MWCNTs) were synthesized using aerosol assisted chemical vapor deposition (CVD) techniques in conjunction with benzylamine:ferrocene or acetonitrile:ferrocene mixtures. Different amounts of toluene were added to these mixtures in order to change the N/C ratio of the feedstock. X-ray photoelectron and near-edge X-ray absorption fine structure spectroscopy detected pyridinic, pyrrolic, graphitic, and molecular nitrogen forms in the N-MWCNT samples. Analysis of the spectral data indicated that whilst the nature of the nitrogen-containing precursor has little effect on the concentrations of the different forms of nitrogen in N-MWCNTs, the N/C ratio in the feedstock appeared to be the determining factor. When the N/C ratio was lower than ca. 0.01, all four forms existed in equal concentrations, for N/C ratios above 0.01, graphitic and molecular nitrogen were dominant. Furthermore, higher concentrations of pyridinic nitrogen in the outer shells and N2 molecules in the core of the as-produced N-MWCNTs suggest that the precursors were decomposed into individual atoms, which interacted with the catalyst surface to form CN and NH species or in fact diffused through the bulk of the catalyst particles. These findings are important for a better understanding of possible growth mechanisms for heteroatom-containing carbon nanotubes (CNTs) and therefore paving the way for controlling the spatial distribution of foreign elements in the CNTs using CVD processes. PMID:26104737

  3. Phonons and Colossal Thermal Expansion Behavior of Ag3Co(CN)6 and Ag3Fe(CN)6

    OpenAIRE

    Mittal, R.; Zbiri, M.; Schober, H.; Achary, S. N.; Tyagi, A. K.; Chaplot, S. L.

    2012-01-01

    Recently colossal positive volume thermal expansion has been found in the framework compounds Ag3Co(CN)6 and Ag3Fe(CN)6. Phonon spectra have been measured using the inelastic neutron scattering technique as a function of temperature and pressure. The data has been analyzed using ab-initio calculations. We find that the bonding is very similar in both compounds. At ambient pressure modes in the intermediate frequency part of the vibrational spectra in the Co compound are shifted to slightly hi...

  4. Baryon Isovector Electric Properties and the Large N_c and Chiral Limits

    OpenAIRE

    Cohen, Thomas D.

    1995-01-01

    A model independent calculation is given for the nucleon isovector electric charge radius which is valid in the limit $N_c \\rightarrow \\infty$, $m_\\pi \\rightarrow 0$, $N_c m_\\pi$ fixed. This expression reduces to that of the Skyrme model in the limit $N_c m_{\\pi} \\rightarrow \\infty$.

  5. EST Table: CN211792 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN211792 rzhswab0_001730 10/09/28 98 %/163 aa ref|NP_001037358.2| time interval mea...suring enzyme-esterase A4 [Bombyx mori] dbj|BAF34334.1| time interval measuring enzyme TIME [Bombyx mori] 10

  6. EST Table: CN211786 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN211786 rzhswab0_006460 10/09/28 46 %/130 aa ref|XP_002430772.1| tyrosine-protein phosphatase corkscrew..., putative [Pediculus humanus corporis] gb|EEB18034.1| tyrosine-protein phosphatase corkscrew

  7. EST Table: CN375203 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN375203 rzhswab0_003107 10/09/28 100 %/199 aa ref|NP_001166288.1| sericin 2 isofor...m 2 precursor [Bombyx mori] gb|ADB04958.1| sericin 2 precursor [Bombyx mori] 10/09/01 low homology 10/08/28

  8. EST Table: CN375202 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN375202 rzhswab0_006736 10/09/28 98 %/193 aa ref|NP_001166288.1| sericin 2 isoform... 2 precursor [Bombyx mori] gb|ADB04958.1| sericin 2 precursor [Bombyx mori] 10/09/01 low homology 10/08/28 l

  9. EST Table: CN378859 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available unit 1 [Semaeopus sp. illimitataDHJ02] 10/09/01 57 %/198 aa FBpp0100176|mt:CoI-PA 10/08/28 44 %/198 aa MTCE....CN378859 rzhswbb0_005540 10/09/28 63 %/198 aa gb|ADE49659.1| cytochrome oxidase sub

  10. EST Table: CN211963 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN211963 rzhswbb0_006380 10/09/28 100 %/136 aa ref|NP_001040402.1| preimplantation ...protein [Bombyx mori] gb|ABF51322.1| preimplantation protein [Bombyx mori] 10/09/01 87 %/137 aa FBpp0116991|

  11. EST Table: CN211900 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN211900 rzhswab0_002080 10/09/28 88 %/197 aa ref|NP_001093316.1| adiponectin recep...tor [Bombyx mori] gb|ABK57116.2| adiponectin receptor [Bombyx mori] 10/09/01 73 %/197 aa FBpp0151302|DgriGH1

  12. EST Table: CN375474 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN375474 rzhswab0_000604 10/09/28 48 %/127 aa ref|XP_969934.1| PREDICTED: similar to maggi...ology 10/09/10 48 %/127 aa gi|91090252|ref|XP_969934.1| PREDICTED: similar to maggie CG14981-PA [Tribolium castaneum] FS905957 L12 ...

  13. EST Table: CN379387 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN379387 rzhswbb0_004120 10/09/28 99 %/113 aa gb|ADB13006.1| elongation factor-1 alpha [Colias pelidne skinn...eri] 10/09/01 95 %/113 aa FBpp0257399|DyakGE12389-PA 10/08/28 77 %/113 aa R03G5.1d#

  14. Multidegrees of tame automorphisms of C^n

    CERN Document Server

    Karaś, Marek

    2011-01-01

    Let F=(F_1,...,F_n):C^n --> C^n be a polynomial mapping. By the multidegree of the mapping F we mean mdeg F=(deg F_1,...,deg F_n), an element of N^n. The aim of this paper is to study the following problem (especially for n=3): for which sequence (d_1,...,d_n) in N^n there is a tame automorphism F of C^n such that mdeg F=(d_1,...,d_n). In other words we investigate the set mdeg(Tame(C^n)), where Tame(C^n) denotes the group of tame automorphisms of C^n and mdeg denotes the mapping from the set of polynomial endomorphisms of C^n into the set N^n. Since for all permutation s of {1,...,n} we have (d_1,...,d_n) is in mdeg(Tame(C^n)) if and only if (d_s(1),...,d_s(n)) is in mdeg(Tame(C^n)) we may focus on the set mdeg(Tame(C^n)) intersected with {(d_1,...,d_n) : d_1<=...<=d_n}. In the paper, among other things, we give complete description of the sets: mdeg(Tame(C^n)) intersected with {(3,d_2,d_3):3<=d_2<=d_3}}, mdeg(Tame(C^n)) intersected with {(5,d_2,d_3):5<=d_2<=d_3}}, In the examination of the...

  15. EST Table: CN374995 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN374995 rzhswab0_002423 10/09/28 71 %/171 aa ref|XP_970542.1| PREDICTED: similar to brix...26-PA 10/09/10 71 %/171 aa gi|91090402|ref|XP_970542.1| PREDICTED: similar to brix domain-containing protein 2 [Tribolium castaneum] FS911686 L12 ...

  16. EST Table: CN374994 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN374994 rzhswab0_003238 10/09/28 72 %/191 aa ref|XP_970542.1| PREDICTED: similar to brix...26-PA 10/09/10 72 %/191 aa gi|91090402|ref|XP_970542.1| PREDICTED: similar to brix domain-containing protein 2 [Tribolium castaneum] FS911686 L12 ...

  17. Multiplier theorems for special Hermite expansions on Cn

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The weak type (1,1) estimate for special Hermite expansions on Cn is proved by using the Calderón-Zygmund decomposition. Then the multiplier theorem in Lp(1

  18. EST Table: CN212111 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN212111 rzhswab0_002624 10/09/28 60 %/172 aa ref|NP_001119705.1| transformer 2 iso...form A [Bombyx mori] gb|AAT42220.2| transformer-2 protein A [Bombyx mori] 10/09/01 low homology 10/08/28 low

  19. Series Design of Large-Scale NC Machine Tool

    Institute of Scientific and Technical Information of China (English)

    TANG Zhi

    2007-01-01

    Product system design is a mature concept in western developed countries. It has been applied in war industry during the last century. However, up until now, functional combination is still the main method for product system design in China. Therefore, in terms of a concept of product generation and product interaction we are in a weak position compared with the requirements of global markets. Today, the idea of serial product design has attracted much attention in the design field and the definition of product generation as well as its parameters has already become the standard in serial product designs. Although the design of a large-scale NC machine tool is complicated, it can be further optimized by the precise exercise of object design by placing the concept of platform establishment firmly into serial product design. The essence of a serial product design has been demonstrated by the design process of a large-scale NC machine tool.

  20. Large Nc from Seiberg–Witten curve and localization

    Directory of Open Access Journals (Sweden)

    Jorge G. Russo

    2015-09-01

    Full Text Available When N=2 gauge theories are compactified on S4, the large Nc limit then selects a unique vacuum of the theory determined by saddle-point equations, which remains determined even in the flat-theory limit. We show that exactly the same equations can be reproduced purely from Seiberg–Witten theory, describing a vacuum where magnetically charged particles become massless, and corresponding to a specific degenerating limit of the Seiberg–Witten spectral curve where 2Nc−2 branch points join pairwise giving aDn=0, n=1,…,Nc−1. We consider the specific case of N=2 SU(Nc SQCD coupled with 2Nf massive fundamental flavors. We show that the theory exhibits a quantum phase transition where the critical point describes a particular Argyres–Douglas point of the Riemann surface.

  1. NC Lathe Training System Based on the Web

    Institute of Scientific and Technical Information of China (English)

    卢碧红; 黄文丽; 葛研军

    2004-01-01

    Based on an analysis of the requirement of network-oriented NC lathe training system, a general framework of web-based training system is established. The key techniques for establishing this system include a three-layer web structure in building the general framework, the technique of VRML to model a virtual operating environment, and the access to the database using the ASP technique.

  2. Steam turbine generators -from NC manufacturing to CAD/CAM

    Energy Technology Data Exchange (ETDEWEB)

    Searle, D.R.; King, F.E.; Kiniskern, J.M.

    1985-04-01

    A program has been designed to integrate engineering, manufacturing, and business systems using a common data base. There has been a significant increase in benefits obtained by extending the automation of the design/drafting function to include manufacturing operations. This extension would have been difficult without the existence of highly developed family-of-parts NC programs. The integration concept has also been applied to turbine buckets and is being extended to other turning-generator components.

  3. A hybrid approach to automatic generation of NC programs

    OpenAIRE

    G. Payeganeh; M. Tolouei-Rad

    2005-01-01

    Purpose: This paper describes AGNCP, an intelligent system for integrating commercial CAD and CAM systems for 2.5D milling operations at a low cost.Design/methodology/approach: It deals with different machining problems with the aid of two expert systems. It recognizes machining features, determines required machining process plans, cutting tools and parameters necessary for generation of NC programs.Findings: The system deals with different machining problems with the aid of two expert syste...

  4. NC-Audit: Auditing for Network Coding Storage

    CERN Document Server

    Le, Anh

    2012-01-01

    Network coding-based storage has recently received a lot of attention thanks to its ability to efficiently repair failed nodes. Independently, another body of work has proposed integrity checking schemes for cloud storage, none of which, however, is customized for network coding storage or can efficiently support repair. In this work, we bridge the gap between these currently disconnected bodies of work, and we focus on the (novel) advantage of network coding for integrity checking. We propose NC-Audit - a remote data integrity checking scheme, designed specifically for network coding-based storage cloud. NC-Audit provides a unique combination of desired properties: (i) efficient checking of data integrity (ii) efficient support for repairing failed nodes (iii) full support for modification of outsourced data and (iv) protection against information leakage when checking is performed by a third party. The key ingredient of the design of NC-Audit is a novel combination of SpaceMac, a homomorphic MAC scheme for ...

  5. TRAC-PF1 post-test predictions for the Semiscale Natural-Circulation Tests S-NC-2 and S-NC-6

    International Nuclear Information System (INIS)

    The TRAC prediction are compared to the data for the Semiscale natural-circular Tests S-NC-2B and S-NC-6. S-NC-2B is a baseline test covering single- and two-phase natural circulation as well as reflux; here TRAC compares quite well with the experiment results for mass flow. For Test S-NC-6, which is a reflux test with various amounts of nitrogen injected into the system, the TRAC prediction of the reflux rate is close to the experiment value with no nitrogen in the system. Ultimately, the maximum reflux rate predicted by TRAC is about 20% higher than the data

  6. Cosmogenic 10Be, 21Ne and 36Cl in sanidine and quartz from Chilean ignimbrites

    Science.gov (United States)

    Ivy-Ochs, S.; Kober, F.; Alfimov, V.; Kubik, P. W.; Synal, H.-A.

    2007-06-01

    Our initial results indicate that three cosmogenic nuclides: 10Be, 21Ne and 36Cl can be analyzed in sanidine. To uncover complex exposure histories or marked changes in denudation rates over time several nuclides with different half-lives (or stable) must be measured. Because of its shorter half-life, the combination of 36Cl and a long-lived nuclide 10Be or stable nuclide 21Ne will provide more information than the pairs 10Be and 26Al or 10Be and 21Ne (in quartz). Sanidine (alkali feldspar) is a common high temperature mineral and often dominates the phenocryst assemblage in silicic to intermediate volcanic rocks. Bedrock surfaces studied come from the Oxaya (erupted 19-23 Ma) and Lauca (erupted 2.7 Ma) ignimbrites of northern Chile. Quartz and sanidine phenocrysts coexist; therefore, we can check the viability of sanidine through direct comparison with nuclide concentrations in quartz. In addition, as quartz has no target for 36Cl in significant abundance we show that the unique power of sanidine is that 36Cl can be measured. We have obtained very good agreement between 10Be and 21Ne concentrations measured in sanidine and coexisting quartz. No meteoric 10Be was apparent in these sanidines. Concentrations of all three nuclides in mineral separates from rock sample CN309 from the Lauca ignimbrite in the Western Cordillera agree well and correspond to minimum exposure ages of 30-50 ka. 10Be and 21Ne measured in both sanidine and quartz from three rock samples from the Oxaya ignimbrite (CN19, CN23, CN104a) in the Western Escarpment record low average landscape modification rates (<0.70 m/Ma) over the last several million years. In contrast, 36Cl data from sanidine in CN23 seem to indicate shorter minimum exposures and more rapid maximum erosion rates.

  7. Model of automated computer aided NC machine tools programming

    Directory of Open Access Journals (Sweden)

    J. Balic

    2006-04-01

    Full Text Available Purpose: Modern companies tend towards the greatest possible automation in all areas. The new control concepts of manufacturing processes required development of adequate tools for the introduction of automated control in a certain area. The paper presents such system for automated programming of CNC machine tools.Design/methodology/approach: The system is based on the previously incorporated know-how and the rules of it implementation in tool – shop. The existing manufacturing knowledge of industry tool production was collected and analysing. On this bases flow chart of all activities were made. Theoretical contribution is made in systemization of technological knowledge, which is now accessible for all workers in NC preparation units.Findings: Utilization of technology knowledge. On the basis of the recognized properties it has worked out the algorithms with which the process of manufacture, the tool and the optimum parameters selected are indirectly determined, whereas the target function was working out of the NC programme. We can first out that with information approaching of the CAM and CAPP the barriers between them, strict so far, disappear.Research limitations/implications: Till now, the system is limited to milling, drilling and similar operation. It could be extended to other machining operations (turning, grinding, wire cutting, etc. with the same procedure. In advanced, some methods of artificial intelligence could be use.Practical implications: It is suitable for industry tools, dies and moulds production, while the system was proved in the real tool shop (production of tools for casting. The system reduces the preparation time of NC programs and could be used with any commercial available CAD/CAM/NC programming systems. Human errors are avoid or at lover level. It is important for engineers in CAD/CAM field and in tool – shops.Originality/value: The developed system is original and was not found in the literature or in the

  8. The NC (numerically controlled) assistant: Interfacing knowledge based manufacturing tools to CAD/CAM systems

    Energy Technology Data Exchange (ETDEWEB)

    Burd, W.C.

    1988-01-01

    A knowledge based computer program that assists programmers of numerically controlled (NC) machine tools is described. The program uses part features identified by the NC programmer and a set of expert system manufacturing rules to select cutting parameters and produce NC part programs. An expert system shell determines the NC sequence and the machining parameters. Several point-to-point NC functions are currently in production. A CAD/CAM system interface for milling and turning functions is also described. 2 refs., 24 figs.

  9. Monoclonal Antibody RYSK173 Recognizes the Dinuclear Zn Center of Serum Carnosinase 1 (CN-1: Possible Consequences of Zn Binding for CN-1 Recognition by RYSK173.

    Directory of Open Access Journals (Sweden)

    Shiqi Zhang

    Full Text Available The proportion of serum carnosinase (CN-1 recognized by RYSK173 monoclonal antibody negatively correlates with CN-1 activity. We thus hypothesized that the epitope recognized by RYSK173 is accessible only in a catalytically incompetent conformation of the zinc dependent enzyme and we mapped its position in the CN-1 structure. Since patients with kidney failure are often deficient in zinc and other trace elements we also assessed the RYSK173 CN-1 proportion in serum of these patients and studied the influence of hemodialysis hereon in relation to Zn2+ and Cu2+ concentration during hemodialysis.Epitope mapping using myc-tagged CN-1 fragments and overlapping peptides revealed that the RYSK173 epitope directly contributes to the formation of the dinuclear Zn center in the catalytic domain of homodimeric CN-1. Binding of RYSK173 to CN-1 was however not influenced by addition of Zn2+ or Cu2+ to serum. In serum of healthy controls the proportion of CN-1 recognized by RYSK173 was significantly lower compared to end-stage renal disease (ESRD patients (1.12 ± 0.17 vs. 1.56 ± 0.40% of total CN-1; p<0.001. During hemodialysis the relative proportion of RYSK173 CN-1 decreased in parallel with increased serum Zn2+ and Cu2+ concentrations after dialysis.Our study clearly indicates that RYSK173 recognizes a sequence within the transition metal binding site of CN-1, thus supporting our hypothesis that metal binding to CN-1 masks the epitope. The CN-1 RYSK173 proportion appears overall increased in ESRD patients, yet it decreases during hemodialysis possibly as a consequence of a relative increase in transition metal bound enzyme.

  10. Classification of ncRNAs using position and size information in deep sequencing data

    Science.gov (United States)

    Erhard, Florian; Zimmer, Ralf

    2010-01-01

    Motivation: Small non-coding RNAs (ncRNAs) play important roles in various cellular functions in all clades of life. With next-generation sequencing techniques, it has become possible to study ncRNAs in a high-throughput manner and by using specialized algorithms ncRNA classes such as miRNAs can be detected in deep sequencing data. Typically, such methods are targeted to a certain class of ncRNA. Many methods rely on RNA secondary structure prediction, which is not always accurate and not all ncRNA classes are characterized by a common secondary structure. Unbiased classification methods for ncRNAs could be important to improve accuracy and to detect new ncRNA classes in sequencing data. Results: Here, we present a scoring system called ALPS (alignment of pattern matrices score) that only uses primary information from a deep sequencing experiment, i.e. the relative positions and lengths of reads, to classify ncRNAs. ALPS makes no further assumptions, e.g. about common structural properties in the ncRNA class and is nevertheless able to identify ncRNA classes with high accuracy. Since ALPS is not designed to recognize a certain class of ncRNA, it can be used to detect novel ncRNA classes, as long as these unknown ncRNAs have a characteristic pattern of deep sequencing read lengths and positions. We evaluate our scoring system on publicly available deep sequencing data and show that it is able to classify known ncRNAs with high sensitivity and specificity. Availability: Calculated pattern matrices of the datasets hESC and EB are available at the project web site http://www.bio.ifi.lmu.de/ALPS. An implementation of the described method is available upon request from the authors. Contact: florian.erhard@bio.ifi.lmu.de PMID:20823303

  11. 75 FR 6862 - Airworthiness Directives; Bombardier, Inc. Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), CL...

    Science.gov (United States)

    2010-02-12

    ... Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic.... Model CL-600-1A11 (CL- 600), CL-600-2A12 (CL-601), CL-600-2B16 (CL-601-3A, CL-601-3R, and CL- 604 Variants (Including CL-605 Marketing Variant)) Airplanes AGENCY: Federal Aviation Administration (FAA),...

  12. New insights into the compressibility and high-pressure stability of Ni(CN)2: a combined study of neutron diffraction, Raman spectroscopy, and inelastic neutron scattering.

    Science.gov (United States)

    Mishra, Sanjay K; Mittal, Ranjan; Zbiri, Mohamed; Rao, Rekha; Goel, Prabhatasree; Hibble, Simon J; Chippindale, Ann M; Hansen, Thomas; Schober, Helmut; Chaplot, Samrath L

    2016-02-01

    Nickel cyanide is a layered material showing markedly anisotropic behaviour. High-pressure neutron diffraction measurements show that at pressures up to 20.1 kbar, compressibility is much higher in the direction perpendicular to the layers, c, than in the plane of the strongly chemically bonded metal-cyanide sheets. Detailed examination of the behaviour of the tetragonal lattice parameters, a and c, as a function of pressure reveal regions in which large changes in slope occur, for example, in c(P) at 1 kbar. The experimental pressure dependence of the volume data is fitted to a bulk modulus, B0, of 1050 (20) kbar over the pressure range 0-1 kbar, and to 124 (2) kbar over the range 1-20.1 kbar. Raman spectroscopy measurements yield additional information on how the structure and bonding in the Ni(CN)2 layers change with pressure and show that a phase change occurs at about 1 kbar. The new high-pressure phase, (Phase PII), has ordered cyanide groups with sheets of D4h symmetry containing Ni(CN)4 and Ni(NC)4 groups. The Raman spectrum of phase PII closely resembles that of the related layered compound, Cu1/2Ni1/2(CN)2, which has previously been shown to contain ordered C≡N groups. The phase change, PI to PII, is also observed in inelastic neutron scattering studies which show significant changes occurring in the phonon spectra as the pressure is raised from 0.3 to 1.5 kbar. These changes reflect the large reduction in the interlayer spacing which occurs as Phase PI transforms to Phase PII and the consequent increase in difficulty for out-of-plane atomic motions. Unlike other cyanide materials e.g. Zn(CN)2 and Ag3Co(CN)6, which show an amorphization and/or a decomposition at much lower pressures (~100 kbar), Ni(CN)2 can be recovered after pressurising to 200 kbar, albeit in a more ordered form. PMID:26751175

  13. Fe(CN)63-/Fe(CN)64-体系阳极过程的电化学Peltier热%Electrochemical Peltier heats of anodic process for Fe(CN)63-/Fe(CN)64- system

    Institute of Scientific and Technical Information of China (English)

    杨中发; 方正; 王少芬; 张正华

    2011-01-01

    The thermo-electrochemical technique was applied to study the electrochemical Peltier heat of electrode reaction. In this experiment, a precision system for thermo-electrochemical measurements with controlled temperature of ±0.001 K was set up, which consists of SRC-100 solution isoperibol calorimeter and an electrochemical workstation. A thermo-sensitive resistor was directly attached to the surface of working electrode to measure the change in potential signal due to temperature change of electrode. The curves of the electrode potential and temperature change against time for equal molar ratio of Fe(CN)63-/Fe(CN)64- couple with 5 sets of different concentrations were obtained under the condition of various constant-current polarizations. Using the thermo-electrochemical method for data-processing, the electrochemical Peltier heat of anodic process of Fe(CN)63-/Fe(CN)64- couple under various concentrations at 298.15 K are determined as 41.51 kJ/mol (0.075 mol/L), 43.48 kJ/mol (0. 10 mol/L), 46.95 kJ/mol(0.15 mol/L), 50.77 kJ/mol(0.20 mol/L)and 54.81 kJ/mol(0.25 mol/L), respectively. The entropy change derived from these Peltier heat for the standard hydrogen electrode on absolute scale at this temperature is also given.%采用热电化学方法测定电极反应电化学Peltier热.实验中将高灵敏度热敏电阻紧贴于工作电极表面,结合SRC-100溶解-反应量热仪与电化学工作站组装成高精度热电化学测试系统,其控温精度达±0.001K.运用该测试系统分别对5个不同浓度等物质的量比的Fe(CN)63-/Fe(CN)64-体系阳极过程进行恒电流极化,得到该电极反应电极电势和温度变化与时间的关系曲线,运用热电化学方程,得到298.15K时Fe(CN)63-/Fe(CN)64-体系阳极过程电化学Peltier热,分别为41.51 kJ/mol(0.075 mol/L),43.48 kJ/mol(0.10 mol/L),46.95 kJ/mol(0.15 mol/L),50.77kJ/mol(0.20 mol/L)和54.81 kJ/mol(0.25 mol/L),由此获得该温度下的标准氢电极反应在绝对标度下的熵变.

  14. EST Table: CN375272 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN375272 rzhswab0_005622 10/09/28 83 %/190 aa ref|XP_001651215.1| vitellogenin, put...ative [Aedes aegypti] gb|EAT42854.1| vitellogenin, putative [Aedes aegypti] 10/09/01 71 %/214 aa FBpp0279094...1086835|ref|XP_974078.1| PREDICTED: similar to vitellogenin, putative [Tribolium castaneum] FS729194 L12 ...

  15. EST Table: CN375273 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN375273 rzhswab0_003293 10/09/28 83 %/167 aa ref|XP_001847442.1| vitellogenin [Cul...ex quinquefasciatus] gb|EDS26195.1| vitellogenin [Culex quinquefasciatus] 10/09/01 70 %/167 aa FBpp0173616|D...aa gi|91086835|ref|XP_974078.1| PREDICTED: similar to vitellogenin, putative [Tribolium castaneum] FS729194 L12 ...

  16. EST Table: CN212174 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN212174 rzhswab0_007010 10/09/28 77 %/192 aa ref|NP_001166288.1| sericin 2 isoform... 2 precursor [Bombyx mori] gb|ADB04958.1| sericin 2 precursor [Bombyx mori] 10/09/01 n.h 10/08/28 n.h 10/09/10 n.h 10/09/10 n.h 10/09/10 n.h BB985569 L12 ...

  17. EST Table: CN376274 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN376274 rzhswab0_006395 10/09/28 44 %/199 aa ref|YP_015696.1| polyprotein [Kakugo ...virus] dbj|BAD06930.1| polyprotein [Kakugo virus] 10/09/01 n.h 10/08/28 n.h 10/09/10 n.h 10/09/10 n.h 10/09/10 n.h CK528690 L12 ...

  18. EST Table: CN376272 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN376272 rzhswba0_003793 10/09/28 45 %/209 aa ref|YP_015696.1| polyprotein [Kakugo ...virus] dbj|BAD06930.1| polyprotein [Kakugo virus] 10/09/01 n.h 10/08/28 n.h 10/09/10 n.h 10/09/10 n.h 10/09/10 n.h CK528690 L12 ...

  19. EST Table: CN376273 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN376273 rzhswab0_002215 10/09/28 42 %/131 aa ref|YP_145791.1| polyprotein [Varroa ...destructor virus 1] gb|AAP51418.2| polyprotein [Varroa destructor virus 1] 10/09/01 n.h 10/08/28 n.h 10/09/10 n.h 10/09/10 n.h 10/09/10 n.h CK528690 L12 ...

  20. Outline of CHN Elementary and CN Environmental Analysis

    OpenAIRE

    Kudzin, Zbigniew H.; Waśkowski, Bogdan

    2004-01-01

    Wydrukowano z dostarczonych Wydawnictwu UŁ gotowych materiałów A review on the CHN analysis of organic compounds and the CN environmental analysis is described. The review contains outline of the evolutionary development of elementary analysis, since Gay-Lussac, Dumas and Liebig era until a present slate analysis, with computer controlled, fully automated analyzers. Physical principles of high temperature and low temperature combustions are discussed. Technical foundations o...

  1. 7 CFR Appendix C to Part 225 - Child Nutrition (CN) Labeling Program

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 4 2010-01-01 2010-01-01 false Child Nutrition (CN) Labeling Program C Appendix C to... SERVICE, DEPARTMENT OF AGRICULTURE CHILD NUTRITION PROGRAMS SUMMER FOOD SERVICE PROGRAM Pt. 225, App. C Appendix C to Part 225—Child Nutrition (CN) Labeling Program 1. The Child Nutrition (CN) Labeling...

  2. 7 CFR Appendix C to Part 226 - Child Nutrition (CN) Labeling Program

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 4 2010-01-01 2010-01-01 false Child Nutrition (CN) Labeling Program C Appendix C to... SERVICE, DEPARTMENT OF AGRICULTURE CHILD NUTRITION PROGRAMS CHILD AND ADULT CARE FOOD PROGRAM Pt. 226, App. C Appendix C to Part 226—Child Nutrition (CN) Labeling Program 1. The Child Nutrition (CN)...

  3. 7 CFR Appendix C to Part 220 - Child Nutrition (CN) Labeling Program

    Science.gov (United States)

    2010-01-01

    ... 7 Agriculture 4 2010-01-01 2010-01-01 false Child Nutrition (CN) Labeling Program C Appendix C to... SERVICE, DEPARTMENT OF AGRICULTURE CHILD NUTRITION PROGRAMS SCHOOL BREAKFAST PROGRAM Pt. 220, App. C Appendix C to Part 220—Child Nutrition (CN) Labeling Program 1. The Child Nutrition (CN) Labeling...

  4. Pressure-induced polymerization of P(CN)3

    Science.gov (United States)

    Gou, Huiyang; Yonke, Brendan L.; Epshteyn, Albert; Kim, Duck Young; Smith, Jesse S.; Strobel, Timothy A.

    2015-05-01

    Motivated to explore the formation of novel extended carbon-nitrogen solids via well-defined molecular precursor pathways, we studied the chemical reactivity of highly pure phosphorous tricyanide, P(CN)3, under conditions of high pressure at room temperature. Raman and infrared (IR) spectroscopic measurements reveal a series of phase transformations below 10 GPa, and several low-frequency vibrational modes are reported for the first time. Synchrotron powder X-ray diffraction measurements taken during compression show that molecular P(CN)3 is highly compressible, with a bulk modulus of 10.0 ± 0.3 GPa, and polymerizes into an amorphous solid above ˜10.0 GPa. Raman and IR spectra, together with first-principles molecular-dynamics simulations, show that the amorphization transition is associated with polymerization of the cyanide groups into CN bonds with predominantly sp2 character, similar to known carbon nitrides, resulting in a novel phosphorous carbon nitride (PCN) polymeric phase, which is recoverable to ambient pressure.

  5. Pressure-induced polymerization of P(CN){sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Gou, Huiyang, E-mail: hgou@ciw.edu, E-mail: tstrobel@ciw.edu; Kim, Duck Young; Strobel, Timothy A., E-mail: hgou@ciw.edu, E-mail: tstrobel@ciw.edu [Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, NW, Washington, DC 20015 (United States); Yonke, Brendan L. [NRC Postdoctoral Associate, Naval Research Laboratory, 4555 Overlook Ave., SW, Washington, DC 20375 (United States); Epshteyn, Albert [Naval Research Laboratory, 4555 Overlook Ave., SW, Washington, DC 20375 (United States); Smith, Jesse S. [High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439 (United States)

    2015-05-21

    Motivated to explore the formation of novel extended carbon-nitrogen solids via well-defined molecular precursor pathways, we studied the chemical reactivity of highly pure phosphorous tricyanide, P(CN){sub 3}, under conditions of high pressure at room temperature. Raman and infrared (IR) spectroscopic measurements reveal a series of phase transformations below 10 GPa, and several low-frequency vibrational modes are reported for the first time. Synchrotron powder X-ray diffraction measurements taken during compression show that molecular P(CN){sub 3} is highly compressible, with a bulk modulus of 10.0 ± 0.3 GPa, and polymerizes into an amorphous solid above ∼10.0 GPa. Raman and IR spectra, together with first-principles molecular-dynamics simulations, show that the amorphization transition is associated with polymerization of the cyanide groups into CN bonds with predominantly sp{sup 2} character, similar to known carbon nitrides, resulting in a novel phosphorous carbon nitride (PCN) polymeric phase, which is recoverable to ambient pressure.

  6. CN and CH Bandstrengths in Bright Globular Cluster Red Giants

    Science.gov (United States)

    Martell, Sarah L.; Smith, G. H.

    2006-12-01

    We present preliminary results from a survey of CN and CH bandstrengths in bright red giant stars (MV -1.5) in Galactic globular clusters. Our cluster sample spans a wide metallicity range, from M92 ([Fe/H]=-2.28) to M71 ([Fe/H]=-0.73). The data were all taken using the Shane 120-inch telescope and the Kast spectrograph at Lick Observatory; the homogeneity of the sample makes it ideal for a comparative study of carbon depletion (and therefore deep mixing rate) as a function of stellar metallicity. Thus far we have measured molecular bandstrength indices for CH and CN, as well as indices for Ca and Mg lines; the task of converting the index measurements to carbon and nitrogen abundances will require comparisons with synthetic spectra. The molecular CN index behaves as expected from a study of the literature: within individual clusters, it varies significantly from star to star. The data also allow us to examine the dependence of the Ca and Mg indices on cluster metallicity at a given MV. The index MHK shows clear sensitivity to [Fe/H] across the full metallicity range of our sample. A similar study is also in progress involving analogous stars in the open clusters NGC 188, NGC 2158, NGC 6791, and NGC 7789 (-0.3 < [Fe/H] < +0.3).

  7. Compositional depth profiling of TaCN thin films

    Energy Technology Data Exchange (ETDEWEB)

    Adelmann, Christoph; Conard, Thierry; Franquet, Alexis; Brijs, Bert; Munnik, Frans; Burgess, Simon; Witters, Thomas; Meersschaut, Johan; Kittl, Jorge A.; Vandervorst, Wilfried; Van Elshocht, Sven [Imec, B-3001 Leuven (Belgium); Forschungszentrum Dresden-Rossendorf, D-01314 Dresden (Germany); Oxford Instruments NanoAnalysis, High Wycombe, HP12 3SE (United Kingdom); Imec, B-3001 Leuven (Belgium); Imec, B-3001 Leuven, Belgium and Instituut voor Kern- en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven (Belgium); Imec, B-3001 Leuven (Belgium)

    2012-07-15

    The composition profiling of thin TaCN films was studied. For the composition profile determination using x-ray photoemission spectrometry (XPS) in combination with Ar sputtering, preferential sputtering effects of N with respect to Ta and C were found to lead to inaccurate elemental concentrations. Sputter yield calculations for the given experimental conditions allowed for the correction of a part of the error, leading to fair accuracy by reference-free measurements. Further improvement of the accuracy was demonstrated by the calibration of the XPS compositions against elastic recoil detection analysis (ERDA) results. For Auger electron spectrometry (AES) in combination with Ar sputtering, accurate results required the calibration against ERDA. Both XPS and AES allowed for a reliable and accurate determination of the compositional profiles of TaCN-based thin films after calibration. Time-of-flight secondary-ion mass spectrometry was also used to assess the composition of the TaCN films. However, the analysis was hampered by large matrix effects due to small unintentional oxygen contents in the films. Energy-dispersive x-ray spectrometry is also discussed, and it is shown that an accurate reference-free measurement of the average film concentration can be achieved.

  8. Research on NC motion controller based on SOPC technology

    Science.gov (United States)

    Jiang, Tingbiao; Meng, Biao

    2006-11-01

    With the rapid development of the digitization and informationization, the application of numerical control technology in the manufacturing industry becomes more and more important. However, the conventional numerical control system usually has some shortcomings such as the poor in system openness, character of real-time, cutability and reconfiguration. In order to solve these problems, this paper investigates the development prospect and advantage of the application in numerical control area with system-on-a-Programmable-Chip (SOPC) technology, and puts forward to a research program approach to the NC controller based on SOPC technology. Utilizing the characteristic of SOPC technology, we integrate high density logic device FPGA, memory SRAM, and embedded processor ARM into a single programmable logic device. We also combine the 32-bit RISC processor with high computing capability of the complicated algorithm with the FPGA device with strong motivable reconfiguration logic control ability. With these steps, we can greatly resolve the defect described in above existing numerical control systems. For the concrete implementation method, we use FPGA chip embedded with ARM hard nuclear processor to construct the control core of the motion controller. We also design the peripheral circuit of the controller according to the requirements of actual control functions, transplant real-time operating system into ARM, design the driver of the peripheral assisted chip, develop the application program to control and configuration of FPGA, design IP core of logic algorithm for various NC motion control to configured it into FPGA. The whole control system uses the concept of modular and structured design to develop hardware and software system. Thus the NC motion controller with the advantage of easily tailoring, highly opening, reconfigurable, and expandable can be implemented.

  9. Universell kopplingsbox mellan NC-maskin och industrirobot

    OpenAIRE

    Martín, Jose Antonio; Trujillo, Eduardo

    2010-01-01

    The aim of this thesis is the design and implementation of a standardized interface to communicate a NC machine with an industrial robot. This interface consists of an ‘electronic box’ which includes a powerful board that is perfect for automation projects composed of a microcontroller, serial ports, optocouplers, relays, etc… The main component of this PCB is the microcontroller. The Atmel AT90CAN128 microcontroller is a good choice for this purpose since it is perfectly suited for industria...

  10. CNC LATHE MACHINE PRODUCING NC CODE BY USING DIALOG METHOD

    Directory of Open Access Journals (Sweden)

    Yakup TURGUT

    2004-03-01

    Full Text Available In this study, an NC code generation program utilising Dialog Method was developed for turning centres. Initially, CNC lathes turning methods and tool path development techniques were reviewed briefly. By using geometric definition methods, tool path was generated and CNC part program was developed for FANUC control unit. The developed program made CNC part program generation process easy. The program was developed using BASIC 6.0 programming language while the material and cutting tool database were and supported with the help of ACCESS 7.0.

  11. Application of COBRA-NC to hydrogen transport

    International Nuclear Information System (INIS)

    COBRA-NC, a thermal-hydraulic computer code for the analysis of light water reactor (LWR) containment system transients is presented. A brief description of the code is provided. While the code is being developed for all phases of a containment transient, data comparisons with hydrogen distribution test data obtained in the Hanford Engineering Development Laboratory test facility and in the Battelle Memorial Institute's test facility are presented in this paper. The advantages this code features over other containment codes is also discussed

  12. TiAlN and TiAlCN deposition in an industrial PaCVD-plant

    Energy Technology Data Exchange (ETDEWEB)

    Heim, D.; Hochreiter, R. [Ruebig GmbH, Co., Wels (Austria)

    1998-01-01

    An industrial PaCVD-plant was equipped with an AlCl{sub 3}-generator. By using Ar, H{sub 2}, N{sub 2}, CH{sub 4}, TiCl{sub 4} and AlCl{sub 3}, TiAlN- and TiAlCN-films could be deposited on hard metal and steel substrates. The plasma was generated by a DC-pulse power supply with frequencies up to 50 kHz. The reactor size was 350 mm in diameter and 900 mm in height. During one batch 1200 indexable inserts could be coated. The growth rates were about 1-3 {mu}m h{sup -1}. The deposited films show a fine structure and Cl-concentrations below 3%. The measured critical loads were between 30 and 40 N. Wear test results show an increase in tool life up to several 100% compared with uncoated or TiN-coated tools. (orig.) 7 refs.

  13. Recovery of iodine from waste CuI containing CuCN%从含CuCN的CuI废渣中回收碘

    Institute of Scientific and Technical Information of China (English)

    蔡作乾; 胡震宁

    1999-01-01

    在生产液晶的一种废渣中含有大量的CuI和微量的CuCN.随着碘的市场价格上涨,从废渣中回收碘变得越来越有意义.为了从废渣中回收碘,选择合适的方法--氧化法提取单质碘,不使其中CN-形成气态形式而逸出.氧化剂采用FeCl3.对CN-的含量进行测定.对于提出的粗碘采用水蒸气蒸馏法进行提纯分析,确定一套安全有效的工艺流程:在室温下,用FeCl3饱和溶液与废渣一起搅拌反应0.5h以上.回收率达85%左右.

  14. Before and After How has the SNO NC measurement changed things?

    CERN Document Server

    Bahcall, J N; Peña-Garay, C; Bahcall, John N.; Peña-Garay, Carlos

    2002-01-01

    We present "Before and After" global oscillation solutions, as well as predicted "Before and After" values and ranges for eight future solar neutrino observables. The ``Before'' case includes all solar neutrino data (and some theoretical improvements) available prior to April 20, 2002 and the ``After'' case includes, in addition, the new SNO data on the CC, NC, and day-night asymmetry. The LMA solution is the only currently allowed MSW oscillation solution at a CL of 98.8 %. The LOW solution is allowed only at 2.5 sigma, SMA at 3.7 sigma, and pure sterile oscillations at 5.4 sigma. Small mixing angles are ``out''(pure sterile is ``way out''); MSW with large mixing angles is definitely ``in''. Vacuum oscillations are allowed, but not robustly, at 2.1 sigma. Precise maximal mixing is excluded at 3.2 sigma for MSW solutions and at 2.8 sigma for vacuum solutions. Most of the predicted values for future observables for the BOREXINO, KamLAND, and future SNO measurements are changed only by minor amounts by the incl...

  15. ISO 14649 (STEP-NC: New Standards for CNC Machining

    Directory of Open Access Journals (Sweden)

    Yusri Yusof

    2010-06-01

    Full Text Available The changing economic climate has made global manufacturing a growing reality over the last decade, forcing companies from east and west and all over the world to collaborate beyond geographic boundaries in the design, manufacture and assemble of products. The ISO10303 and ISO14649 Standards (STEP and STEP-NC have been developed to introduce interoperability into manufacturing enterprises so as to meet the challenge of responding to production on demand. The paper focuses on the use of this new standard to address the process planning and machining of turn/mill discrete components. Due to the complexity of programming these machines there is a need to model their process capability to improve the interoperable manufacturing capability in places such as turning centres. Finally a proposed computational environment for a STEP-NC compliant system for turning operations (SCSTO is described. And supported by the specification of information models and constructed using a structured methodology and object-oriented methods. SCSTO was developed to generate a Part 21 file based on machining features to support the interactive generation of process plans utilizing feature extraction. A case study component has been developed to prove the concept for using the milling and turning parts of ISO14649 to provide a turn-mill CAD/CAPP/CAM environment.

  16. Study of an NC system of machining crown gears

    Science.gov (United States)

    Xu, Xiaogang; Wang, Huaqing; Yan, Jian; Gao, Shenyou

    2005-12-01

    Crown gear couplings are usually used in metallurgy and steel rolling equipments, which is manufactured by duplicating processing in common. The method makes the manipulator work hard, and the efficiency is low. The machining precision is limited to the shape of the mold and it is difficult to control the movement of machines table. This work stated an NC system to use hobbing machine. It consists of an industrial control computer, grating sensor, servo- motor and its driver source, servo driver card and other I/O equipments of inputting and outputting. The grating sensor was installed in the axial direction to trace the instantaneous position of gob rest. The radial movement of the machine table was controlled by a servomotor. When the computer captures the axial signal, this system controls the machine table by moving ahead or backwards according to the calculated value of interpolation theory. Thus, two dimensions (axial and radial) associated movement was realized while the crown gear was processed. The feature of the system is that a grating sensor used in the axial direction replaces the servomotor. By making a little change in the mechanism of the machine, NC can be implement and its redesign cost is very low. The design software has an interpolation function for a circular arc and line. The system has been used on a Y1380 gear hobbing machine, and the correlative software of machining crown gear has been designed as well. Satisfactory results have been obtained, showing facility and reliability in practical operation.

  17. Can the nucleon axial charge be O(Nc^0)?

    CERN Document Server

    Kojo, Toru

    2012-01-01

    The nucleon self-energy and its relation to the nucleon axial charge gA are discussed at large Nc. The energy is compared for the hedgehog, conventional, and recently proposed dichotomous nucleon wavefunctions which give different values for gA. We consider their energies at both perturbative and non-perturbative levels. In perturbative estimates, we take into account the pion exchanges among quarks up to the third orders of axial charge vertices, including the many-body forces such as the Wess-Zumino terms. It turns out that the perturbative pion exchanges among valence quarks give the same leading Nc contributions for three wavefunctions, while their mass differences are O(Lamba_qcd). The signs of splittings flip for different orders of the axial charge vertices, so it is hard to conclude which one is the most energetically favored. For non-perturbative estimates involving the modification of quark bases, we use the chiral quark soliton model as an illustration. With the hedgehog quark wavefunctions with gA...

  18. 75 FR 37994 - Airworthiness Directives; Bombardier, Inc. Model CL-600-1A11 (CL-600), CL-600-2A12 (CL-601), CL...

    Science.gov (United States)

    2010-07-01

    ... FR 6862). That NPRM proposed to correct an unsafe condition for the specified products. The MCAI... ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3..., Inc. Model CL-600-1A11 (CL- 600), CL-600-2A12 (CL-601), CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-...

  19. Construction of the Active Site of Metalloenzyme on Au NC Micelles

    Institute of Scientific and Technical Information of China (English)

    ZHANG, Zhiming; FU, Qiuan; HUANG, Xin; XU, Jiayun; LIU, Junqiu; SHEN, Jiacong

    2009-01-01

    For developing an efficient nanoenzyme system with self-assembly strategy, gold nanocrystal micelles (Au NC micelles) with inserted catalytic Zn(Ⅱ) centers were constructed by self-assembly of a catalytic ligand [N,N-bis(2-aminoethyl)-N'dodecylethylenediamine] Zn(Ⅱ) complexes (Zn(Ⅱ)L) on the surface of Au NC via hy- drophobic interaction. The functionalized Au NC micelles acted as an excellent nanoenzyme model for imitating ribonuclease. The catalytic capability of the Au NC micelles was evaluated by accelerating the cleavage of 2-hydroxypropyl p-nitrophenyl phosphate (HPNP). These functionalized Au NC micelles exhibited considerable ri- bonuclease-like activities by a factor of 4.9×104 (kcat/kuncat) for the cleavage of HPNP in comparison to the sponta- neous cleavage of HPNP at 37℃. The catalytic capability of the functionalized Au NC micelles can be considera- bly compared to other models reported previously as nanoenzymes under the comparable conditions.

  20. The Nc dependencies of baryon masses: Analysis with Lattice QCD and Effective Theory

    Energy Technology Data Exchange (ETDEWEB)

    Calle Cordon, Alvaro C. [JLAB; DeGrand, Thomas A. [University of Colorado; Goity, Jose L. [JLAB

    2014-07-01

    Baryon masses at varying values of Nc and light quark masses are studied with Lattice QCD and the results are analyzed in a low energy effective theory based on a combined framework of the 1/Nc and Heavy Baryon Chiral Perturbation Theory expansions. Lattice QCD results for Nc=3, 5 and 7 obtained in quenched calculations, as well as results for unquenched calculations for Nc=3, are used for the analysis. The results are consistent with a previous analysis of Nc=3 LQCD results, and in addition permit the determination of sub-leading in 1/Nc effects in the spin-flavor singlet component of the baryon masses as well as in the hyperfine splittings.

  1. A theoretical study of spectroscopy and metastability of the CN2+ dication

    International Nuclear Information System (INIS)

    Graphical abstract: Spectroscopic constants and adiabatic excitation energies of CN2+ were calculated, and double ionization energy of CN was estimated using high-level abinitio methods. Tunneling and spin–orbit induced predissociation lifetimes were predicted. Highlights: ► Spectroscopic constants of 13 electronic states of CN2+. ► Double ionization energy of CN by MRCI and RCCSD(T) methods. ► Spin–orbit integrals of CN2+ as a function of internuclear distance. ► Tunneling and spin–orbit induced predissociation lifetimes of CN2+. - Abstract: Potential energy curves of low-lying electronic states of the CN2+ dication and of the electronic ground states of CN+ and the neutral CN molecule were calculated using internally contracted multireference CI and the coupled cluster RCCSD(T) methods. Spectroscopic constants and adiabatic excitation energies of 13 quasibound electronic states of the dication were obtained and the energy of charge stripping of CN+ and double ionization energy of CN were predicted. Tunneling and spin–orbit induced predissociation lifetimes for the vibrational levels in the low-lying electronic states are presented and the metastability of the dication is discussed.

  2. Flexible charge balanced stimulator with 5.6 fC accuracy for 140 nC injections.

    Science.gov (United States)

    Nag, Sudip; Jia, Xiaofeng; Thakor, Nitish V; Sharma, Dinesh

    2013-06-01

    Electrical stimulations of neuronal structures must ensure net injected charges to be zero for biological safety and voltage compliance reasons. We present a novel architecture of general purpose biphasic constant current stimulator that exhibits less than 5.6 fC error while injecting 140 nC charges using 1.4 mA currents. The floating current sources and conveyor switch based system can operate in monopolar or bipolar modes. Anodic-first or cathodic-first pulses with optional inter-phase delays have been demonstrated with zero quiescent current requirements at the analog front-end. The architecture eliminates blocking capacitors, electrode shorting and complex feedbacks. Bench-top and in-vivo measurement results have been presented with emulated electrode impedances (resistor-capacitor network), Ag-AgCl electrodes in saline and in-vivo (acute) peripheral nerve stimulations in anesthetized rats. PMID:23853326

  3. Characterizing ncRNAs in human pathogenic protists using high-throughput sequencing technology

    Directory of Open Access Journals (Sweden)

    Lesley Joan Collins

    2011-12-01

    Full Text Available ncRNAs are key genes in many human diseases including cancer and viral infection, as well as providing critical functions in pathogenic organisms such as fungi, bacteria, viruses and protists. Until now the identification and characterization of ncRNAs associated with disease has been slow or inaccurate requiring many years of testing to understand complicated RNA and protein gene relationships. High-throughput sequencing now offers the opportunity to characterize miRNAs, siRNAs, snoRNAs and long ncRNAs on a genomic scale making it faster and easier to clarify how these ncRNAs contribute to the disease state. However, this technology is still relatively new, and ncRNA discovery is not an application of high priority for streamlined bioinformatics. Here we summarize background concepts and practical approaches for ncRNA analysis using high-throughput sequencing, and how it relates to understanding human disease. As a case study, we focus on the parasitic protists Giardia lamblia and Trichomonas vaginalis, where large evolutionary distance has meant difficulties in comparing ncRNAs with those from model eukaryotes. A combination of biological, computational and sequencing approaches has enabled easier classification of ncRNA classes such as snoRNAs, but has also aided the identification of novel classes. It is hoped that a higher level of understanding of ncRNA expression and interaction may aid in the development of less harsh treatment for protist-based diseases.

  4. NC flame pipe cutting machine tool based on open architecture CNC system

    Institute of Scientific and Technical Information of China (English)

    Xiaogen NIE; Yanbing LIU

    2009-01-01

    Based on the analysis of the principle and flame movement of a pipe cutting machine tool, a retrofit NC flame pipe cutting machine tool (NFPCM) that can meet the demands of cutting various pipes is proposed. The paper deals with the design and implementation of an open architecture CNC system for the NFPCM, many of whose aspects are similar to milling machines; however, different from their machining processes and control strategies. The paper emphasizes on the NC system structure and the method for directly creating the NC file according to the cutting type and parameters. Further, the paper develops the program and sets up the open and module NC system.

  5. Homocoupling of aryl halides in flow: Space integration of lithiation and FeCl3 promoted homocoupling

    OpenAIRE

    Aiichiro Nagaki; Yuki Uesugi; Yutaka Tomida; Jun-ichi Yoshida

    2011-01-01

    The use of FeCl3 resulted in a fast homocoupling of aryllithiums, and this enabled its integration with the halogen–lithium exchange reaction of aryl halides in a flow microreactor. This system allows the homocoupling of two aryl halides bearing electrophilic functional groups, such as CN and NO2, in under a minute.

  6. Homocoupling of aryl halides in flow: Space integration of lithiation and FeCl3 promoted homocoupling

    OpenAIRE

    Nagaki, Aiichiro; Uesugi, Yuki; Tomida, Yutaka; Yoshida, Jun-ichi

    2011-01-01

    The use of FeCl3 resulted in a fast homocoupling of aryllithiums, and this enabled its integration with the halogen–lithium exchange reaction of aryl halides in a flow microreactor. This system allows the homocoupling of two aryl halides bearing electrophilic functional groups, such as CN and NO2, in under a minute.

  7. Homocoupling of aryl halides in flow: Space integration of lithiation and FeCl3 promoted homocoupling

    Directory of Open Access Journals (Sweden)

    Aiichiro Nagaki

    2011-08-01

    Full Text Available The use of FeCl3 resulted in a fast homocoupling of aryllithiums, and this enabled its integration with the halogen–lithium exchange reaction of aryl halides in a flow microreactor. This system allows the homocoupling of two aryl halides bearing electrophilic functional groups, such as CN and NO2, in under a minute.

  8. EST Table: CN373825 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN373825 rzhswba0_000992 10/09/28 77 %/105 aa ref|NP_001036841.1| Annexin IX isofor...m A [Bombyx mori] dbj|BAA92809.1| annexin IX-A [Bombyx mori] 10/09/01 66 %/105 aa FBpp0280989|DpseGA19090-PA...| PREDICTED: similar to Annexin IX CG5730-PC [Tribolium castaneum] NM_001043376 L12 ... ... 57 %/105 aa gnl|Amel|GB16448-PA 10/09/10 65 %/105 aa gi|91092420|ref|XP_967931.1

  9. Fission decay of $^{282}$Cn studied using cranking inertia

    CERN Document Server

    Poenaru, D N

    2014-01-01

    Superheavy nuclei produced until now are decaying mainly by $\\alpha$~emission and spontaneous fission. Calculated $\\alpha$~decay half-lives are in agreement with experimental data within one order of magnitude. The discrepancy between theory and experiment can be as high as ten orders of magnitude for spontaneous fission. We analyze a way to improve the accuracy by using the action integral based on cranking inertia and a potential barrier computed by the macroscopic-microscopic method with a two-center shell model. Illustrations are given for $^{282}$Cn which has a measured fission half-life.

  10. Fission decay of 282Cn studied using cranking inertia

    International Nuclear Information System (INIS)

    Superheavy nuclei produced until now are decaying mainly by α emission and spontaneous fission. Calculated α decay half-lives are in agreement with experimental data to within one order of magnitude. The discrepancy between theory and experiment can be as high as ten orders of magnitude for spontaneous fission. We analyze a way to improve the accuracy by using the action integral based on cranking inertia and a potential barrier computed by the macroscopic-microscopic method with a two-center shell model. Illustrations are given for 282Cn which has a measured fission half-life. (paper)

  11. CN jet velocity in Comet P/Halley

    Science.gov (United States)

    Klavetter, James J.; A'Hearn, Michael F.

    1992-01-01

    The projected expansion velocity of Comet Halley's coma is presently determined in CN jet images that were processed with a radial profile subtraction technique. It is established that the flow is approximately radial, and that the velocity can also be determined by measuring specific radial features in jets. The largest projected velocity is 1.7 +/- 0.3 km/sec, at 50,000 km from the nucleus. This is the largest expansion velocity found for this region of the Comet Halley coma. Comparisons are made with other observations and theoretical models.

  12. EST Table: CN373995 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available x mori] dbj|BAE53372.1| antibacterial peptide [Bombyx mori] dbj|BAF51564.1| gloverin2 [Bombyx mori] 10/09/01 n.h 10/08/28 n.h 10/09/10 n.h 10/09/10 n.h 10/09/10 n.h FS917189 L12 ... ...CN373995 rzhswba0_009205 10/09/28 95 %/144 aa ref|NP_001037683.1| gloverin 2 [Bomby

  13. EST Table: CN376997 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN376997 rzhswab0_005805 10/09/28 96 %/147 aa ref|NP_731941.1| effete [Drosophila m...elanogaster] ref|NP_001119686.1| effete [Acyrthosiphon pisum] ref|XP_310998.2| AGAP000145-PA [Anopheles gamb...ein ligase) (Ubiquitin carrier protein) (Protein effete) [Tribolium castaneum] re...ame: Full=Ubiquitin-protein ligase; AltName: Full=Ubiquitin carrier protein; AltName: Full=Protein effete em...b|CAA44453.1| ubiquitin-conjugating enzyme [Drosophila melanogaster] gb|AAF55093.1| effet

  14. Study of Machining Error Forecast in NC Lathe

    Institute of Scientific and Technical Information of China (English)

    LIU Jiwei; ZHANG Ying; YANG Zheqing

    2006-01-01

    This paper brings forward a kind of machining error forecast principle in NC lathe simulation system. It combines the method of math, dynamic, material and mechanism, etc, sums up the factors which can affect the machining error, coalescent knowledge of mechanism manufacture technique and interconvert characteristic, mapped the change of physics factor in cutting process into virtual manufacture system by mathematical model. On the platform of Windows 2000 and Visual C++, applying program is developed by use of C++. The lean warehouse of MATLAB is transferred in order to command MATLAB on the language platform of MATLAB, and then the curve of the results is drawn by the outcome of calculation, which is based on the mathematical model in order to manifest the simulation results in the pattern of data and curve.

  15. NC-3智能快速充电器

    Institute of Scientific and Technical Information of China (English)

    于左

    2001-01-01

    @@ 使用数字照相机的人特别关心其电池充电设备的好坏.由于现在的可充电池的容量成倍增长,用老式的固定电流式充电器往往需要很长时间才能将电池充满;一般的快速充电器又容易将小容量的可充电池过量充电.笔者向大家介绍"三洋"公司出品的NC-3智能快速充电器.

  16. METHODS OF OBTAINING HIGH QUALITY OF METALWORKING NC MACHINES

    OpenAIRE

    Ota, Yoshimi

    2009-01-01

    Приведены сведения об опыте работы японской компании Mori Seiki в области создания перспективного металлообрабатывающего оборудования с ЧПУInformation about operational experience of Japanese company Mori Seiki in the field of making perspective metal-working NC machines is presented

  17. Quaternary hard nanocomposite TiCxNy/SiCN coatings prepared by plasma enhanced chemical vapor deposition

    International Nuclear Information System (INIS)

    Individual hard thin film materials such as TiN, SiN1.3, SiC and CNx exhibit attractive mechanical, tribological, optical and electronic properties related to their microstructure and chemical bonding. In the present work, we combine the characteristics of such materials, while systematically studying quaternary thin films prepared by plasma enhanced chemical vapor deposition (PECVD) from TiCl4/SiH4/N2/CH4 mixtures with different concentrations of CH4. Detailed structural and chemical characterizations using transmission electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and elastic recoil detection suggest formation of a TiCxNy/SiCN nanocomposite structure. Depth-sensing indentation, static indentation and curvature measurements, on samples prepared under optimal conditions, reveal a hardness of 55 GPa, reduced Young's modulus of 302 GPa, a compressive stress of 2.0 GPa, an elastic rebound of more than 80 %, H3/Er2 coefficient of 1.8 GPa and a high toughness. The friction coefficient and the wear rate, measured against diamond, are 0.13*10-6 and 12*10-6 mm3/Nm, respectively. We compare the properties of the present nanocomposite TiCxNy/SiCN coatings with the performance of PECVD films from our earlier studies: these include TiN/SiN1.3 nanocomposites and SiCN, for which we obtained a hardness of 45 and 33 GPa, and a reduced Young's modulus of 350 and 200 GPa, respectively

  18. ncDNA and drift drive binding site accumulation

    Directory of Open Access Journals (Sweden)

    Ruths Troy

    2012-08-01

    Full Text Available Abstract Background The amount of transcription factor binding sites (TFBS in an organism’s genome positively correlates with the complexity of the regulatory network of the organism. However, the manner by which TFBS arise and accumulate in genomes and the effects of regulatory network complexity on the organism’s fitness are far from being known. The availability of TFBS data from many organisms provides an opportunity to explore these issues, particularly from an evolutionary perspective. Results We analyzed TFBS data from five model organisms – E. coli K12, S. cerevisiae, C. elegans, D. melanogaster, A. thaliana – and found a positive correlation between the amount of non-coding DNA (ncDNA in the organism’s genome and regulatory complexity. Based on this finding, we hypothesize that the amount of ncDNA, combined with the population size, can explain the patterns of regulatory complexity across organisms. To test this hypothesis, we devised a genome-based regulatory pathway model and subjected it to the forces of evolution through population genetic simulations. The results support our hypothesis, showing neutral evolutionary forces alone can explain TFBS patterns, and that selection on the regulatory network function does not alter this finding. Conclusions The cis-regulome is not a clean functional network crafted by adaptive forces alone, but instead a data source filled with the noise of non-adaptive forces. From a regulatory perspective, this evolutionary noise manifests as complexity on both the binding site and pathway level, which has significant implications on many directions in microbiology, genetics, and synthetic biology.

  19. Study on Intelligent NC Programming for Complex Components of Marine Diesel Based on KBE and UG NX

    Institute of Scientific and Technical Information of China (English)

    ZHANG Liang; ZHANG Shengwen; FANG Xifeng

    2006-01-01

    The NC programming for complex components has lots drawbacks such as excessive repetitious labors, heavy workload and lack of optimization, which are especially serious in NC programming for complex components of marine diesel. Based on the key technologies of applying KBE(Knowledge Based Engineering)to NC programming--knowledge representation, generalized knowledge base, knowledge acquisition and knowledge reasoning, the system of intelligent NC programming for complex components of marine diesel has been built by means of the knowledge template and the UG/Open. The experiment results indicate that the NC program generated with high efficiency of NC programming by the system is accurate enough to meet the need of NC machining. Consequently, the automatization and intelligentization of NC programming has been presented, and the study is proved to be a successful attempt in the area of applying KBE to NC programming.

  20. Study on Interaction of ADN and (NC+NG) by Gasometric Method%量气法研究ADN与(NC+NG)的相互作用

    Institute of Scientific and Technical Information of China (English)

    何少蓉; 张林军; 衡淑云; 刘子如

    2008-01-01

    用 NBK型"拉瓦"量气测试系统研究了较高温度下二硝酰胺铵(ADN)与双基吸收药(NC+NG)体系的相互作用,从动力学角度阐述了二者的相互作用.结果表明: ADN与(NC+NG)混合物加热分解的最终放气量在标准状态下为626.8 mL·g-1,与ADN和(NC+NG)最大放气量之和相比并没有增加,但分解速度显著提高,活化能显著降低至82.58 kJ·mol-1,ADN与(NC+NG)之间存在强烈的相互作用.

  1. Dynamical Effects and Product Distributions in Simulated CN + Methane Reactions.

    Science.gov (United States)

    Preston, Thomas J; Hornung, Balázs; Pandit, Shubhrangshu; Harvey, Jeremy N; Orr-Ewing, Andrew J

    2016-07-14

    Dynamics of collisions between structured molecular species quickly become complex as molecules become large. Reactions of methane with halogen and oxygen atoms serve as model systems for polyatomic molecule chemical dynamics, and replacing the atomic reagent with a diatomic radical affords further insights. A new, full-dimensional potential energy surface for collisions between CN + CH4 to form HCN + CH3 is developed and then used to perform quasi-classical simulations of the reaction. Coupled-cluster energies serve as input to an empirical valence bonding (EVB) model, which provides an analytical function for the surface. Efficient sampling permits simulation of velocity-map ion images and exploration of dynamics over a range of collision energies. Reaction populates HCN vibration, and energy partitioning changes with collision energy. The reaction cross-section depends on the orientation of the diatomic CN radical. A two-dimensional extension of the cone of acceptance for an atom in the line-of-centers model appropriately describes its reactivity. The simulation results foster future experiments and diatomic extensions to existing atomic models of chemical collisions and reaction dynamics. PMID:26812395

  2. A new technique of integral representations in Cn

    Institute of Scientific and Technical Information of China (English)

    YAO; Zongyuan

    2001-01-01

    [1]Bochner, S., Analytic and meromorphic continuation by means of Green's formula, Ann. of Math., 1943, 44: 652—671.[2]Yao Zongyuan, An integral formula on bounded domains in Cn, Science in China, Ser. A (in Chinese), 1992, 22(1): 1—10.[3]Zhong Tongde, Huang Sha, Complex Analysis in Several Variables (in Chinese), Shijiazhuang: Hebei Educational Press, 1990.[4]Henkin, G. M., Leiterer, J., Theory of Functions on Complex Manifolds, Berlin: Academie-Verlag Berlin and Birkh user-Verlag Boston, 1984.[5]Yao Zongyuan, Bochner-Ono formula for the local solution of the -equation on bounded domains in Cn, Advances in Mathematics (in Chinese), 1993, 22(6): 550—560.[6]Henkin, G. M., Integral representations of holomorphic functions in strictly pseudoconvex domains and some applications, Mat. Sb. (in Russian), 1969, 78(120): 611—632.[7]Henkin, G. M., Integral representations of holomorphic functions in strictly pseudoconvex domains and applications to the  problem, Mat. Sb. (in Russian), 1970, 82(124): 300—308.[8]Grauert, H., Lieb, I., Das Ramirezsche integral und diellisung der Gleichung f=α im bereich der beschr nkten fornen, Proc. Conf. Complex Analysis, Rice Univ. Studies, 1970, 56: 29—50.

  3. CN Morphology Studies of Comet 103P/Hartley 2

    CERN Document Server

    Knight, Matthew M

    2011-01-01

    We report on narrowband CN imaging of Comet 103P/Hartley 2 obtained at Lowell Observatory on 39 nights from 2010 July until 2011 January. We observed two features, one generally to the north and the other generally to the south. The CN morphology varied during the apparition: no morphology was seen in July; in August and September the northern feature dominated and appeared as a mostly face-on spiral; in October, November, and December the northern and southern features were roughly equal in brightness and looked like more side-on corkscrews; in January the southern feature was dominant but the morphology was indistinct due to very low signal. The morphology changed smoothly during each night and similar morphology was seen from night to night. However, the morphology did not exactly repeat each rotation cycle, suggesting that there is a small non-principal axis rotation. Based on the repetition of the morphology, we find evidence that the fundamental rotation period was increasing: 16.7 hr from August 13-17,...

  4. Homeomorphic extension of strongly spirallike mappings in C~n

    Institute of Scientific and Technical Information of China (English)

    CURT; Paula; KOHR; Gabriela; KOHR; Mirela

    2010-01-01

    In this paper we consider a proper subclass nA of the full class of spirallike mappings on the Euclidean unit ball Bn in Cn with respect to a given linear operator A. We use the method of subordination chains to obtain an upper growth result for nA , and we obtain various examples of mappings in the same class of normalized biholomorphic mappings on the unit ball Bn in Cn . We also prove that the class nA is compact, while the full class of spirallike mappings with respect to a linear operator need not be compact in dimension n≥2, even when the operator is diagonal. This is one of the motivations for considering the class nA . Finally we prove that if f is a quasiregular strongly spirallike mapping on Bn such that ||[Df(z)]-1 Af(z)|| is uniformly bounded on Bn , then f extends to a homeomorphism of R2n onto itself. In addition, if A + A* = 2aI n for some a >0, this extension is also quasiconformal on R2n .

  5. Low energy electron attachment to cyanamide (NH2CN)

    International Nuclear Information System (INIS)

    Cyanamide (NH2CN) is a molecule relevant for interstellar chemistry and the chemical evolution of life. In the present investigation, dissociative electron attachment to NH2CN has been studied in a crossed electron–molecular beams experiment in the electron energy range from about 0 eV to 14 eV. The following anionic species were detected: NHCN−, NCN−, CN−, NH2−, NH−, and CH2−. The anion formation proceeds within two broad electron energy regions, one between about 0.5 and 4.5 eV and a second between 4.5 and 12 eV. A discussion of possible reaction channels for all measured negative ions is provided. The experimental results are compared with calculations of the thermochemical thresholds of the anions observed. For the dehydrogenated parent anion, we explain the deviation between the experimental appearance energy of the anion with the calculated corresponding reaction threshold by electron attachment to the isomeric form of NH2CN—carbodiimide

  6. NC++: a NOW-Based Object-Oriented Distributed Programming Language%基于NOW的对象式分布式程序设计语言NC++

    Institute of Scientific and Technical Information of China (English)

    顾庆; 谢立; 陈道蓄; 吴迎红; 孙钟秀

    2001-01-01

    An object-oriented distributed programming language NC++ which is based on NOW (network of workstations) environment is introduced in this paper. It is an extension of DC++. NC++ gives a rather complete programming environment, including NC++ pre-compiler, visual-programming interface, multicast communicating facility and a test system. It improves the process group management and inter-process communication facilities, and puts forth a DSM (distributed shared memory) subsystem based on belief network, which is used to manipulate C++ global variables. In practice, NC++ offers simplicity for distributed program design without sacrificing the performance.%提出了一个基于工作站网(network of workstations,简称NOW)的分布式程序设计语言NC++(NOW C++).它是DC++语言的扩充.NC++提供了一个完备的编程环境,包括NC++预编译器、图视编程界面、多目通信机制和测试系统.它完善了组管理机制和进程通信机制,提出了一个基于信度推理网络的分布共享内存(distributed shared memory,简称DSM)机制以管理C++公共变量.实践证明,NC++语言在确保编程方便性的前提下保证了分布式程序的性能.

  7. 量气法研究三种黏合剂与CL-20混合体系的热行为%Thermal Behaviors of CL-20 Systems Mixed with Three Binders by Gasometric Method

    Institute of Scientific and Technical Information of China (English)

    何少蓉; 衡淑云; 张林军; 刘子如

    2010-01-01

    用 NBK型"拉瓦"量气测试系统研究了较高温度(160~200 ℃)下六硝基六氮杂异伍兹烷(CL-20)与硝化棉和硝化甘油双基吸收药(NC+NG)、环氧乙烷与四氢呋喃共聚醚(PET)、3,3-双叠氮甲基氧杂环丁烷与四氢呋喃共聚物(PBT)三种黏合剂的全分解过程,从放气规律和动力学的变化阐述了CL-20及其与三种黏合剂混合体系的热行为.结果表明: CL-20 及其与(NC+NG) 、PET、PBT三种黏合剂混合体系的热分解表观活化能分别为176.68,176.31,136.12,127.0 kJ·mol~(-1).(NC+NG)黏合剂对CL-20的分解反应速度以及活化能几乎没有影响;CL-20初期分解的气体产物与PET和PBT两种黏合剂发生"非均相的气相/凝聚相反应",使得混合体系的分解表观活化能降低,分解速度显著加快.同时,(NC+NG)、PET和PBT没有改变CL-20分解的机理函数.

  8. 33 CFR 110.170 - Lockwoods Folly Inlet, N.C.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Lockwoods Folly Inlet, N.C. 110.170 Section 110.170 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Anchorage Grounds § 110.170 Lockwoods Folly Inlet, N.C. (a)...

  9. Concept of automatic programming of NC machine for metal plate cutting by genetic algorithm method

    Directory of Open Access Journals (Sweden)

    B. Vaupotic

    2005-12-01

    Full Text Available Purpose: In this paper the concept of automatic programs of the NC machine for metal plate cutting by genetic algorithm method has been presented.Design/methodology/approach: The paper was limited to automatic creation of NC programs for two-dimensional cutting of material by means of adaptive heuristic search algorithms.Findings: Automatic creation of NC programs in laser cutting of materials combines the CAD concepts, the recognition of features and creation and optimization of NC programs. The proposed intelligent system is capable to recognize automatically the nesting of products in the layout, to determine the incisions and sequences of cuts forming the laid out products. Position of incisions is determined at the relevant places on the cut. The system is capable to find the shortest path between individual cuts and to record the NC program.Research limitations/implications: It would be appropriate to orient future researches towards conceiving an improved system for three-dimensional cutting with optional determination of positions of incisions, with the capability to sense collisions and with optimization of the speed and acceleration during cutting.Practical implications: The proposed system assures automatic preparation of NC program without NC programer.Originality/value: The proposed concept shows a high degree of universality, efficiency and reliability and it can be simply adapted to other NC-machines.

  10. Nucleic Acid Chaperone Activity of HIV-1 NC Proteins Investigated by Single Molecule DNA Stretching

    Science.gov (United States)

    Williams, Mark C.; Gorelick, Robert J.; Musier-Forsyth, Karin; Bloomfield, Victor A.

    2002-03-01

    HIV-1 Nucleocapsid Protein (NC) is a nucleic acid chaperone protein that is responsible for facilitating numerous nucleic acid rearrangements throughout the reverse transcription cycle of HIV-1. To understand the mechanism of NC’s chaperone function, we carried out single molecule DNA stretching studies in the presence of NC and mutant forms of NC. Using an optical tweezers instrument, we stretch single DNA molecules from the double-stranded helical state to the single-stranded (coil) state. Based on the observed cooperativity of DNA force-induced melting, we find that the fraction of melted base pairs at room temperature is increased dramatically in the presence of NC. Thus, upon NC binding, increased thermal fluctuations cause continuous melting and reannealing of base pairs so that DNA strands are able to rapidly sample configurations in order to find the lowest energy state. While NC destabilizes the double-stranded form of DNA, a mutant form of NC that lacks the zinc finger structures does not. DNA stretching experiments carried out in the presence of NC variants containing more subtle changes in the zinc finger structures were conducted to elucidate the contribution of each individual finger to NC’s chaperone activity, and these results will be reported.

  11. 33 CFR 165.T05-0091 - Safety Zone; Alligator River, NC.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Safety Zone; Alligator River, NC... Safety Zone; Alligator River, NC. (a) Definitions. For the purposes of this section, Captain of the Port... on the waters of the Alligator River centered at (35°54′3″ N/076°00′25″ W) a position directly...

  12. Anion-Dependent Aggregate Formation and Charge Behavior of Colloidal Fullerenes (n-C60)

    Science.gov (United States)

    The fate and transport of colloidal fullerenes (n-C60) in the environment is likely to be guided by electrokinetic and aggregation behavior. In natural water bodies inorganic ions exert significant effects in determining the size and charge of n-C60 nanoparticles. Although the ef...

  13. Process design for NC machining%数控加工的工艺设计

    Institute of Scientific and Technical Information of China (English)

    杨毅

    2001-01-01

    The steps of process design, details and main points of NC machining are introduced. The method of NC machining process design is presented.%重点介绍了数控加工工艺设计的步骤、内容和要点,提供了数控加工工艺设计的方法。

  14. Renormalization of the baryon axial vector current in large-Nc chiral perturbation theory

    International Nuclear Information System (INIS)

    The baryon axial vector current is considered within the combined framework of large-Nc baryon chiral perturbation theory (where Nc is the number of colors) and the baryon axial vector couplings are extracted. Loop graphs with octet and decuplet intermediate states are systematically incorporated into the analysis

  15. A Survey of CN and CH Variations in Galactic Globular Clusters from SDSS Spectroscopy

    CERN Document Server

    Smolinski, Jason P; Beers, Timothy C; Lee, Young Sun

    2011-01-01

    We present a homogeneous survey of the CN and CH bandstrengths in eight Galactic globular clusters observed during the course of the Sloan Extension for Galactic Understanding and Exploration (SEGUE) sub-survey of the SDSS. We confirm the existence of a bimodal CN distribution among RGB stars in all of the clusters with metallicity greater than [Fe/H] = -1.7; the lowest metallicity cluster with an observed CN bimodality is M53, with [Fe/H] ~ -2.1. There is also some evidence for individual CN groups on the subgiant branches of M92, M2, and M13, and on the red giant branches of M92 and NGC 5053. Finally, we quantify the correlation between overall cluster metallicity and the slope of the CN bandstrength-luminosity plot as a means of further demonstrating the level of CN-enrichment in cluster giants. Our results agree well with previous studies reported in the literature.

  16. potential role of H2CN radicals in pre-biotic synthesis

    International Nuclear Information System (INIS)

    Using ab initio method, the minimum energy conformations and net charge distribution have been studied for H2CN radical isomers formed by addition of a H atom (or an electron) to HCN (or HNC) molecule. Calculations show that there are three possible isomers, namely H2CN(I), H2CN(II) and H2CN(III). The order of relative stability is (I) > (III) > (II). From quantum chemical study and the estimations in thermochemistry for the reactions (1) and (2), the possible role of H2CN radicals in pre-biotic organic synthesis has been discussed and it has been proposed that H2CN(III) radical is an important intermediate to synthesize amino acids. The results, show that HNC is also an important product in the evolution chain of biomolecules under some special conditions, such as the electric discharge for atmosphere

  17. Conversion of Cn-Unsaturated into Cn-2-Saturated LCFA Can Occur Uncoupled from Methanogenesis in Anaerobic Bioreactors.

    Science.gov (United States)

    Cavaleiro, Ana J; Pereira, Maria Alcina; Guedes, Ana P; Stams, Alfons J M; Alves, M Madalena; Sousa, Diana Z

    2016-03-15

    Fat, oils, and grease present in complex wastewater can be readily converted to methane, but the energy potential of these compounds is not always recyclable, due to incomplete degradation of long chain fatty acids (LCFA) released during lipids hydrolysis. Oleate (C18:1) is generally the dominant LCFA in lipid-containing wastewater, and its conversion in anaerobic bioreactors results in palmitate (C16:0) accumulation. The reason why oleate is continuously converted to palmitate without further degradation via β-oxidation is still unknown. In this work, the influence of methanogenic activity in the initial conversion steps of unsaturated LCFA was studied in 10 bioreactors continuously operated with saturated or unsaturated C16- and C18-LCFA, in the presence or absence of the methanogenic inhibitor bromoethanesulfonate (BrES). Saturated Cn-2-LCFA accumulated both in the presence and absence of BrES during the degradation of unsaturated Cn-LCFA, and represented more than 50% of total LCFA. In the presence of BrES further conversion of saturated intermediates did not proceed, not even when prolonged batch incubation was applied. As the initial steps of unsaturated LCFA degradation proceed uncoupled from methanogenesis, accumulation of saturated LCFA can be expected. Analysis of the active microbial communities suggests a role for facultative anaerobic bacteria in the initial steps of unsaturated LCFA biodegradation. Understanding this role is now imperative to optimize methane production from LCFA. PMID:26810160

  18. Baryon wave function in large-Nc QCD: universality, nonlinear evolution equation and asymptotic limit

    CERN Document Server

    Pobylitsa, P V

    2004-01-01

    The 1/Nc expansion is formulated for the baryon wave function in terms of a specially constructed generating functional. The leading order of this 1/Nc expansion is universal for all low lying baryons [including the O(1/Nc)and O(1)excited resonances] and for baryon-meson scattering states. A nonlinear evolution equation of Hamilton-Jacobi type is derived for the generating functional describing the baryon distribution amplitude in the large-Nc limit. In the asymptotic regime this nonlinear equation is solved analytically. The anomalous dimensions of the leading twist baryon operators diagonalizing the evolution are computed analytically up to the next-to-leading order of the 1/Nc expansion.

  19. Laser annealing of sputter-deposited -SiC and -SiCN films

    Indian Academy of Sciences (India)

    M A Fraga; M Massi; I C Oliveira; F D Origo; W Miyakawa

    2011-12-01

    This work describes the laser annealing of -SiC and -SiCN films deposited on (100) Si and quartz substrates by RF magnetron sputtering. Two samples of -SiCN thin films were produced under different N2/Ar flow ratios. Rutherford backscattering spectroscopy (RBS), Raman analysis and Fourier transform infrared spectrometry (FTIR) techniques were used to investigate the composition and bonding structure of as-deposited and laser annealed SiC and SiCN films.

  20. Estimation of CN Parameter for Small Agricultural Watersheds Using Asymptotic Functions

    Directory of Open Access Journals (Sweden)

    Tomasz Kowalik

    2015-03-01

    Full Text Available This paper investigates a possibility of using asymptotic functions to determine the value of curve number (CN parameter as a function of rainfall in small agricultural watersheds. It also compares the actually calculated CN with its values provided in the Soil Conservation Service (SCS National Engineering Handbook Section 4: Hydrology (NEH-4 and Technical Release 20 (TR-20. The analysis showed that empirical CN values presented in the National Engineering Handbook tables differed from the actually observed values. Calculations revealed a strong correlation between the observed CN and precipitation (P. In three of the analyzed watersheds, a typical pattern of the observed CN stabilization during abundant precipitation was perceived. It was found that Model 2, based on a kinetics equation, most effectively described the P-CN relationship. In most cases, the observed CN in the investigated watersheds was similar to the empirical CN, corresponding to average moisture conditions set out by NEH-4. Model 2 also provided the greatest stability of CN at 90% sampled event rainfall.

  1. THE SPATIAL DISTRIBUTION OF OH AND CN RADICALS IN THE COMA OF COMET ENCKE

    International Nuclear Information System (INIS)

    Multiple potential parent species have been proposed to explain CN abundances in comet comae, but the parent has not been definitively identified for all comets. This study examines the spatial distribution of CN radicals in the coma of comet Encke and determines the likelihood that CN is a photodissociative daughter of HCN in the coma. Comet Encke is the shortest orbital period (3.3 years) comet known and also has a low dust-to-gas ratio based on optical observations. Observations of CN were obtained from 2003 October 22 to 24, using the 2.7 m telescope at McDonald Observatory. To determine the parent of CN, the classical vectorial model was modified by using a cone shape in order to reproduce Encke's highly aspherical and asymmetric coma. To test the robustness of the modified model, the spatial distribution of OH was also modeled. This also allowed us to obtain CN/OH ratios in the coma. Overall, we find the CN/OH ratio to be 0.009 ± 0.004. The results are consistent with HCN being the photodissociative parent of CN, but we cannot completely rule out other possible parents such as CH3CN and HC3N. We also found that the fan-like feature spans ∼90°, consistent with the results of Woodney et al..

  2. A Survey of CN and CH Variations in Galactic Globular Clusters from SDSS Spectroscopy

    OpenAIRE

    Smolinski, Jason P.; Martell, Sarah L.; Beers, Timothy C.; Lee, Young Sun

    2011-01-01

    We present a homogeneous survey of the CN and CH bandstrengths in eight Galactic globular clusters observed during the course of the Sloan Extension for Galactic Understanding and Exploration (SEGUE) sub-survey of the SDSS. We confirm the existence of a bimodal CN distribution among RGB stars in all of the clusters with metallicity greater than [Fe/H] = -1.7; the lowest metallicity cluster with an observed CN bimodality is M53, with [Fe/H] ~ -2.1. There is also some evidence for individual CN...

  3. On the Attosecond charge migration in Cl.....N, Cl.....O, Br.....N and Br.....O Halogen-bonded clusters: Effect of donor, acceptor, vibration, rotation, and electron correlation

    Indian Academy of Sciences (India)

    SANKHABRATA CHANDRA; MOHAMMED MUSTHAFA IQBAL; ATANU BHATTACHARYA

    2016-08-01

    The electron-electron relaxation and correlation-driven charge migration process, which features pure electronic aspect of ultrafast charge migration phenomenon, occurs on a very short timescale in ionized molecules and molecular clusters, prior to the onset of nuclear motion. In this article, we have presented natureof ultrafast pure electronic charge migration dynamics through Cl.....N, Cl.....O, Br.....N, and Br.....O halogen bonds, explored using density functional theory. We have explored the role of donor, acceptor, electron correlation, vibration and rotation in charge migration dynamics through these halogen bonds. For this work, we have selected ClF, Cl₂, ClOH, ClCN, BrF, BrCl, BrOH, and BrCN molecules paired with either NH₃ or H₂O. We have found that the timescale for pure electron-electron relaxation and correlation-driven charge migration through the Cl.....N, Br.....N, Cl.....O, and Br.....O halogen bonds falls in the range of 300–600 attosecond. The primary driving force behind the attosecond charge migration through the Cl.....N, Br.....N, Cl.....O, and Br.....O halogen bonds is the energy difference (∆E) between two stationary cationic orbitals (LUMO-β and HOMO-β), which together represents the initial hole density immediately following vertical ionization. We have also predicted that the strength of electron correlation has significant effect on the charge migration timescale in Cl.....N, Br.....N, Cl.....O, and Br.....O halogen bonded clusters. Vibration and rotation are also found to exhibit profound effect on attosecond charge migration dynamics through halogen bonds.

  4. Optimalizace NC programu pomocí CAD/CAM software

    OpenAIRE

    Paseka, Jan

    2014-01-01

    Cílem této diplomové práce je návrh úsporných opatření v procesu technologické přípravy výroby průmyslového podniku. V první části je zpracován obecný teoretický rozbor součástkové základny a stávajících NC programů. Na základě těchto poznatků a provedené analýzy byly stanoveny návrhy optimalizace popsané ve druhé části. Díky těmto návrhům dochází při jejich plné implementaci k úspoře časových nároků a finančních prostředků potřebných pro zavedení prototypového výrobku do sériové produkce....

  5. A hybrid approach to automatic generation of NC programs

    Directory of Open Access Journals (Sweden)

    G. Payeganeh

    2005-12-01

    Full Text Available Purpose: This paper describes AGNCP, an intelligent system for integrating commercial CAD and CAM systems for 2.5D milling operations at a low cost.Design/methodology/approach: It deals with different machining problems with the aid of two expert systems. It recognizes machining features, determines required machining process plans, cutting tools and parameters necessary for generation of NC programs.Findings: The system deals with different machining problems with the aid of two expert systems. The first communicates with CAD system for recognizing machining features. It is developed in LISP as machining features can be properly represented by LISP codes is ideal for manipulating lists and input data. The second expert system requires extensive communications with several databases for retrieving tooling and machining information and VP-Expert shell was found to be the most suitable package to perform this task.Research limitations/implications: 2.5D milling covers a wide range of operations. However, work is in progress cover 3D milling operations. The system can also be modified to be used for other activities such as turning, flame cutting, electro discharge machining (EDM, punching, etc.Practical implications: Use of AGNCP resulted in improved efficiency, noticeable time savings, and elimination of the need for expert process planners.Originality/value: The paper describes a method for eliminating the need for extensive user intervention for CAD/CAM integration.

  6. 76 FR 46597 - Airworthiness Directives; Bombardier, Inc. Model CL-600-2A12 (CL-601) and CL-600-2B16 (CL-601-3A...

    Science.gov (United States)

    2011-08-03

    .... Model CL-600-2A12 (CL- 601) and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) Airplanes... Bombardier, Inc. model-- Task(s)-- Initial compliance time (whichever occurs later)-- CL-600-2A12 (CL-601... icing. accumulation of 4,800 after the effective inclusive; and CL-600-2B16 (CL- total flight hours;...

  7. Evolution of e-Business Standards and Research on cnXML%电子商务标准的演进与cnXML的研究

    Institute of Scientific and Technical Information of China (English)

    徐博艺; 杨冬梅; 姜丽红; 马范援

    2004-01-01

    综述了电子商务标准的发展状况,对传统EDI与当前几种新型电子商务标准进行了比较,研究了中国电子商务规范cnXML的架构,剖析了利用cnXML进行电子商务交易的过程.

  8. A hydrochemical investigation using 36Cl/Cl in groundwaters

    OpenAIRE

    Metcalfe, R.

    2003-01-01

    This report describes 36Cl studies which were undertaken during the H14 financial year. 6 groundwater samples were collected for 36Cl analysis. The results of this study suggest that 36Cl data could potentially be useful for interpreting groundwater origins and flow paths.

  9. Process-scheme-driven automatic construction of NC machining cell for aircraft structural parts

    Institute of Scientific and Technical Information of China (English)

    Chen Shulin; Zheng Guolei; Zhou Min; Du Baorui; Chu Hongzhen

    2013-01-01

    In order to enhance the NC programming efficiency and quality of aircraft structural parts (ASPs), an intelligent NC programming pattern driven by process schemes is presented. In this pattern, the NC machining cell is the minimal organizational structure in the technological process, consisting of an operation machining volume cell, and the type and parameters of the machining operation. After the machining cell construction, the final NC program can be easily obtained in a CAD/CAM system by instantiating the machining operation for each machining cell. Accord-ingly, how to automatically establish the machining cells is a key issue in intelligent NC program-ming. On the basis of the NC machining craft of ASP, the paper aims to make an in-depth research on this issue. Firstly, some new terms about the residual volume and the machinable volume are defined, and then, the technological process is modeled with a process scheme. Secondly, the approach to building the machining cells is introduced, in which real-time complement machining is mainly considered to avoid interference and overcutting. Thirdly, the implementing algorithm is designed and applied to the Intelligent NC Programming System of ASP. Finally, the developed algorithm is validated through two case studies.

  10. The origin of blue photoluminescence from nc-Si/SiO2 multilayers

    Institute of Scientific and Technical Information of China (English)

    Ma Zhong-Yuan; Xu Ling; Huang Xin-Fan; Chen Kun-Ji; Feng Duan; Guo Si-Hua; Chen De-Yuan; Wei De-Yuan; Yao Yao; Zhou Jiang; Huang Rui; Li Wei; Xu Jun

    2008-01-01

    Intensive blue photoluminescence (PL) was observed at room temperature from the nanocrystalline-Si/SiO2 (ncSi/SiO2) multilayers (MLs) obtained by thermal annealing of SiO/SiO2 MLs for the first time.By controlling the size of nc-Si formed in SiO sublayer from 3.5 to 1.5 nm,the PL peak blueshifts from 457 to 411 nm.Combining the analysis of TEM,Raman and absorption measurement,this paper attributes the blue PL to multiple luminescent centres at the interface of nc-Si and SiO2.

  11. Directly Generating the NC Machining Program from AutoCAD Graph

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    One kind of auto-programming method directly gener at ing the NC machining program by AutoCAD graph is discussed in this article. Firs tly, the article discusses the open type graphic interface of AutoCAD. Then the graphic export among the AutoCAD, the adding of process information and the data storage, as well as technology of generating NC program has been introduced . Finally, a NC auto-programming system GAPS based on AutoCAD graph is develope d. The tendency of auto-programming is graphic auto-pro...

  12. Sequence Variation in the Gp120 region of SHIV-CN97001 during in vivo Passage

    Institute of Scientific and Technical Information of China (English)

    Qiang LIU; Gui-bo YANG; Yue MA; Chen-li QIU; Jie-jie DAI; Hui XING; Yi-ming SHAO

    2008-01-01

    SHIV-CN97001 played an important role in assessing the immune effect and strategy of the AIDS vaccine which included genes of the predominant prevalent HIV-1 strain in China. In this study, SHIV-CN97001 was in vivo passaged serially to construct pathogenic SHIV-CN97001/rhesus macaques model. To identify variation in the gp120 region of SHIV-CN97001 during passage, the fragments of gp120 gene were amplified by RT-PCR from the plasma of SHIV-CN97001 infected animals at the peak viral load time point and the gene distances (divergence, diversity) were calculated using DISTANCE. The analysis revealed that the genetic distances of SHIV-CN97001 in the third passage animals were the highest during in vivo passage. It had a relationship between viral divergence from the founder strain and viral replication ability. The nucleic acid sequence of the V3 region was highly conservative. All of the SHIV-CN97001 strains had V3 loop central motif (GPGQ) and were predicted to be using CCR5 co-receptor on the basis of the critical amino acids within V3 loop. These results show that there was no significant increase in the genetic distance during serial passage, and SHIV-CN97001 gp120 gene evolved toward ancestral states upon transmission to a new host. This could partly explain why there was no pathogenic viral strain obtained during in vivo passage.

  13. Preparation and properties of SiCN diffusion barrier layer for Cu interconnect in ULSI

    Institute of Scientific and Technical Information of China (English)

    ZHOU Ji-cheng; SHI Zhi-jie; ZHENG Xu-qiang

    2009-01-01

    SiCN thin films and Cu/SiCN/Si structures were fabricated by magnetron sputtering. And some samples underwent the rapid thermal annealing(RTA) processing. The thin-film surface morphology, crystal structure and electronic properties were characterized by atomic force microscopy(AFM), X-ray diffractometry(XRD), Fourier transform infrared transmission(FTIR) and four-point probe(FPP) analyses. The results reveal the formation of complex networks among the three elements, Si, C and N, and the existence of different chemical bonds in the SiCN films, such as Si-C, Si-N, C-N and C=N. The as-deposited SiCN thin films are amorphous in the Cu/SiCN/Si structures and have good thermal stability, and the SiCN thin films are still able to prevent the diffusion reaction between Cu and Si interface after RTA processing at 600 ℃ for 5 min.

  14. Theoretical study on the reaction mechanism of CN radical with ketene

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The bimolecular single collision reaction potential energy surface of CN radical with ketene (CH2CO) was investigated by means of B3LYP and QCISD(T) methods. The calculated results indicate that there are three possible channels in the reaction. The first is an attack reaction by the carbon atom of CN at the carbon atom of the methylene of CH2CO to form the intermediate NCCH2CO followed by a rupture reaction of the C-C bond combined with -CO group to the products CH2CN+CO. The second is a direct addition reaction between CN and CH2CO to form the intermediate CH2C(O)CN followed by its isomerization into NCCH2CO via a CN-shift reaction, and subsequently, NCCH2CO dissociates into CH2CN+CO through a CO-loss reaction. The last is a direct hydrogen abstraction reaction of CH2CO by CN radical. Because of the existence of a 15.44 kJ/mol reaction barrier and higher energy of reaction products, the path can be ruled out as an important channel in the reaction kinetics. The present theoretical computation results, which give an available suggestion on the reaction mechanism, are in good agreement with previous experimental studies.

  15. Spatial and temporal variations in the column density distribution of comet Halley's CN coma

    Science.gov (United States)

    Schulz, Rita; Schlosser, W.; Meisser, W.; Koczet, P.; Celnik, W. E.

    1992-01-01

    Mean radial column density profiles of comet P/Halley's CN coma were derived by combining photographic and photoelectric observations. The shape of the profiles as well as their temporal variations were analyzed in detail and compared with the results of other CN observations of the comet.

  16. InterProScan Result: CN375201 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN375201 CN375201_2_ORF2 8A3835D3A94B2D47 PANTHER PTHR11461 SERINE PROTEASE INHIBITOR, SERP...IN 0.00057 T IPR000215 Protease inhibitor I4, serpin Molecular Function: serine-type endopeptidase inhibitor activity (GO:0004867) ...

  17. Laguerre expansion on the Heisenberg group and Fourier-Bessel transform on Cn

    Institute of Scientific and Technical Information of China (English)

    CHANG; Der-Chen; GRIENER; Peter; TIE; Jingzhi

    2006-01-01

    Given a principal value convolution on the Heisenberg group Hn = Cn × R, we study the relation between its Laguerre expansion and the Fourier-Bessel expansion of its limit on Cn. We also calculate the Dirichlet kernel for the Laguerre expansion on the group Hn.

  18. theCN.com: An Academic-cum-Social Networking Online Platform

    Directory of Open Access Journals (Sweden)

    Mandar Lakshmikant Bhanushe

    2013-09-01

    Full Text Available This article is a review of theCN, an online virtual learning environment. CN is more than a learning management system, as it not only focuses on course content delivery and management, but takes it a step further by introducing the networking of courses and their content. In comparison with existing LMS’s, which are housed in closed walls with limited access to learners and instructors within institutions, used to merely manage courses online, CN is an open, free, academic and social networking framework scalable to massive numbers of learners from any place in the world within a single environment. CN is free for all to use across the globe. With some minor improvements, CN, as an LMS is surely one of very useful and helpful virtual learning technology tool available to distance learners and institutions to make learning entertaining and fruitful in achieving its learning objectives.

  19. Sources of suspended sediment in the Lower Roanoke River, NC

    Science.gov (United States)

    Jalowska, A. M.; McKee, B. A.; Rodriguez, A. B.; Laceby, J. P.

    2015-12-01

    The Lower Roanoke River, NC, extends 220 km from the fall line to the bayhead delta front in the Albemarle Sound. The Lower Roanoke is almost completely disconnected from the upper reaches by a series of dams, with the furthest downstream dam located at the fall line. The dams effectively restrict the suspended sediment delivery from headwaters, making soils and sediments from the Lower Roanoke River basin, the sole source of suspended sediment. In flow-regulated rivers, bank erosion, especially mass wasting, is the major contributor to the suspended matter. Additional sources of the suspended sediment considered in this study are river channel, surface soils, floodplain surface sediments, and erosion of the delta front and prodelta. Here, we examine spatial and temporal variations in those sources. This study combined the use of flow and grain size data with a sediment fingerprinting method, to examine the contribution of surface and subsurface sediments to the observed suspended sediment load along the Lower Roanoke River. The fingerprinting method utilized radionuclide tracers 210Pb (natural atmospheric fallout), and 137Cs (produced by thermonuclear bomb testing). The contributions of surface and subsurface sources to the suspended sediment were calculated with 95% confidence intervals using a Monte-Carlo numerical mixing model. Our results show that with decreasing river slope and changing hydrography along the river, the contribution of surface sediments increases and becomes a main source of sediments in the Roanoke bayhead delta. At the river mouth, the surface sediment contribution decreases and is replaced by sediments eroded from the delta front and prodelta. The area of high surface sediment contribution is within the middle and upper parts of the delta, which are considered net depositional. Our study demonstrates that floodplains, often regarded to be a sediment sink, are also a sediment source, and they should be factored into sediment, carbon and

  20. Constitutional Isomerism of BiW6Cl15: (BiCl)[W6Cl14] and (BiCl2)[W6Cl13

    OpenAIRE

    Meyer, Hans-Juergen

    2009-01-01

    Abstract The compound (BiCl)[W6Cl14] was previously characterized as a product of the reduction of tungsten hexachloride with elemental bismuth. Another modification of BiW6Cl15 is now presented as (BiCl2)[W6Cl13], based on the results of an X-ray single crystal structure determination (space group P21/c, a = 1354.3(2) pm, b = 1234.4(2) pm, c = 1538.9(2) pm, and ? = 118.76(1) ?). The structure of (BiCl2)[W6Cl13] contains chains of [(W6Cl8i)Cl4aCl2/2a-a]- clusters bridged by chlorin...

  1. Preparation and characterization of polymer blends of NC and GAP-TPE%NC/GAP-TPE共混聚合物的制备和性能研究

    Institute of Scientific and Technical Information of China (English)

    左海丽; 肖乐勤; 菅晓霞; 周伟良

    2011-01-01

    A series of blends of energetic thermoplastic polyurethane( GAP-TPE)and Nitrocellulose( NC) were prepared by the way of chain extension,blend and aging. The structures of the blends were analyzed by means of FT1R spectroscopy, wide-angle Xray diffraction,and scanning electron microscopy. The compatibility and properties of the blends were characterized by dynamic mechanical analysis( DMA)and tensile testing. It suggests that nitrocellulose molecules penetrate into the polyurethane and interrupt the intra-hydrogen bonding between the hard and soft segments. The results indicate that the blended sheets exhibited good miscibility. The tensile strength increased with an increase of NC content. The blends NC/GAP-TPE having 5%~20% NC exhibited a significant increase from 10.4 Mpa to 20.4 Mpa for tensile strength ,49% increased.%采用扩链后共混再熟化的方法,制备了1组不同组成的硝化棉(NC)/含能热塑性弹性体(GAP-TPE)共混聚合物.采用红外光谱(FTIR)和X射线衍射(XRD)表征NC/GAP-TPE共混物的结构,扫描电镜(SEM)观察共混物的断面,动态热机械分析(DMA)测定共混物的玻璃化转变,运用拉伸实验研究不同配比NC/GAP-TPE共混物的力学性能.结果表明,NC和GAP-TPE分子间存在氢键相互作用.NC均匀分散在GAP-TPE基体中,不同配比的NC/GAP-TPE共混物均存在1个玻璃化温度,二者之间具有较好的相容性.当NC含量从5%到20%变化时,共混试样的拉伸强度从10.4 MPa增加至20.4 MPa,提高了49%.

  2. The NC16A Domain of Collagen XVII Plays a Role in Triple Helix Assembly and Stability*

    OpenAIRE

    Van den Bergh, Françoise; Fu, Chang-Ling; Olague-Marchan, Monica; Giudice, George J.

    2006-01-01

    Collagen XVII/BP180 is a transmembrane constituent of the epidermal anchoring complex. To study the role of its non-collagenous linker domain, NC16A, in protein assembly and stability, we analyzed the following recombinant proteins: the collagen XVII extracellular domain with or without NC16A, and a pair of truncated proteins comprising the COL15-NC15 stretch expressed with or without NC16A. All four proteins were found to exist as stable collagen triple helices; however, the two missing NC16...

  3. Evolution of twist-three parton distributions in QCD beyond the large $N_{c}$ limit

    CERN Document Server

    Braun, V M; Manashov, A N

    2000-01-01

    We formulate a consistent 1/N_c^2 expansion of the QCD evolution equations for the twist-three quark distributions g_2(x,Q^2), h_L(x,Q^2) and e(x,Q^2) based on the interpretation of the evolution as a three-particle quantum-mechanical problem with hermitian Hamiltonian. Each distribution amplitude can be decomposed in contributions of partonic components with DGLAP-type scale dependence. We calculate the 1/N_c^2 corrections to the evolution of the dominant component with the lowest anomalous dimension - the only one that survives in the large-N_c limit - and observe a good agreement with the exact numerical results for N_c=3. The 1/N_c^2 admixture of operators with higher anomalous dimensions is shown to be concentrated at a few lowest partonic components and in general is rather weak.

  4. Fabrication and characteristics of the nc-Si/c-Si heterojunction MAGFET

    Institute of Scientific and Technical Information of China (English)

    Zhao Xiaofeng; Wen Dianzhong

    2009-01-01

    A MAGFET using an nc-Si/c-Si heterojunction as source and drain was fabricated by CMOS technology, using two ohm-contact electrodes as Hall outputs on double sides of the channel situated 0.7L from the source. The experimental results show that when V_(DS) = -7.0 V, the magnetic sensitivity of the single nc-Si/c-Si heterojunction magnetic metal oxide semiconductor field effect transistor (MAGFET) with an L : W ratio of 2 : 1 is 21.26 mV/T,and that with an L : W ratio of 4 : 1 is 13.88 mV/T. When the outputs of double nc-Si/c-Si heterojunction MAGFETs with an L : W ratio of 4 : 1 are in series, their magnetic sensitivity is 22.74 mV/T, which is an improvement of about 64% compared with that of a single nc-Si/c-Si heterojunction MAGFET.

  5. EnviroAtlas -Durham, NC- One Meter Resolution Urban Area Land Cover Map (2010) Web Service

    Data.gov (United States)

    U.S. Environmental Protection Agency — This EnviroAtlas web service supports research and online mapping activities related to EnviroAtlas (https://www.epa.gov/enviroatlas ). The EnviroAtlas Durham, NC...

  6. EnviroAtlas -Durham, NC- One Meter Resolution Urban Area Land Cover Map (2010)

    Data.gov (United States)

    U.S. Environmental Protection Agency — The EnviroAtlas Durham, NC land cover map was generated from USDA NAIP (National Agricultural Imagery Program) four band (red, green, blue and near infrared) aerial...

  7. Investigation on the foaming behaviors of NC-based gun propellants

    Directory of Open Access Journals (Sweden)

    Yu-xiang Li

    2014-09-01

    Full Text Available To prepare the porous NC-based (nitrocellulose-based gun propellants, the batch foaming process of using supercritical CO2 as the physical blowing agent is used. The solubilities of CO2 in the single-base propellants and TEGDN (trimethyleneglycol dinitrate propellants are measured by the gravimetric method, and SEM (scanning electron microscope is used to observe the morphology of foamed propellants. The result shows that a large amount of CO2 could be dissolved in NC-based propellants. The experimental results also reveal that the energetic plasticizer TEGDN exerts an important influence on the pore structure. The triaxial tensile failure mechanism for solid-state nucleation is used to explain the nucleation of NC-based propellants in the solid state. Since some specific foaming behaviors of NC-based propellants can not be explained by the failure mechanism, a solid-state nucleation mechanism which revises the triaxial tensile failure mechanism is proposed and discussed.

  8. De Novo Discovery of Structured ncRNA Motifs in Genomic Sequences

    DEFF Research Database (Denmark)

    Ruzzo, Walter L; Gorodkin, Jan

    2014-01-01

    De novo discovery of "motifs" capturing the commonalities among related noncoding ncRNA structured RNAs is among the most difficult problems in computational biology. This chapter outlines the challenges presented by this problem, together with some approaches towards solving them, with an emphas...... on an approach based on the CMfinder CMfinder program as a case study. Applications to genomic screens for novel de novo structured ncRNA ncRNA s, including structured RNA elements in untranslated portions of protein-coding genes, are presented.......De novo discovery of "motifs" capturing the commonalities among related noncoding ncRNA structured RNAs is among the most difficult problems in computational biology. This chapter outlines the challenges presented by this problem, together with some approaches towards solving them, with an emphasis...

  9. Complete Genome Sequence of NC983, a Live Attenuated Strain of Salmonella enterica Serovar Typhimurium

    Science.gov (United States)

    Troxell, Bryan; Fink, Ryan C.; Dickey, Allison N.; Scholl, Elizabeth H.

    2016-01-01

    Foodborne infections caused by Salmonella enterica serovars are a significant problem worldwide. Presented here is the genome sequence of the nontyphoidal S. enterica serovar Typhimurium mutant strain NC983, a potential vaccine candidate. PMID:27738027

  10. Anything But Ordinary ——hebrew.cri.cn

    Institute of Scientific and Technical Information of China (English)

    徐嘉

    2014-01-01

    In the present era of accelerated technological development with its proliferation of new digital media,PC and Internet,the main questions concerning communication practices examine the patterns of interaction between these practices and the use of‘old’media,such as print,the electronic and audiovisual media,television,radio and VCR,which have all dominated the communication scene until fairly recently.Definitely we can say that the internet has become a family member that no one can live without it,especially the new types electronic products’sale in the markets and the development of the wireless(wifi),what’s more,the high click rates of facebook,youtube,twitter and so on.This great change also have happened in China that you can see the first thing for everyone in the morning is connecting the internet so as to read weibo(micro blog,its function is similar to twitter,now it is the most popular and famous micro blog in China),youku(similar to ytube),xiaonei(like facebook)and so on.Therefore a great many‘old’media in China is now experiencing the large reform.CRI(China Radio International)cannot lag behind.In this paper,I am trying to introduce one website from CRI which is called"hebrew.cri.cn"as a landscape to state her"birth","grow up(development)"and her"future".

  11. Delayed presentation of traumatic facial nerve (CN VII) paralysis.

    Science.gov (United States)

    Napoli, Anthony M; Panagos, Peter

    2005-11-01

    Facial nerve paralysis (Cranial Nerve VII, CN VII) can be a disfiguring disorder with profound impact upon the patient. The etiology of facial nerve paralysis may be congenital, iatrogenic, or result from neoplasm, infection, trauma, or toxic exposure. In the emergency department, the most common cause of unilateral facial paralysis is Bell's palsy, also known as idiopathic facial paralysis (IFP). We report a case of delayed presentation of unilateral facial nerve paralysis 3 days after sustaining a traumatic head injury. Re-evaluation and imaging of this patient revealed a full facial paralysis and temporal bone fracture extending into the facial canal. Because cranial nerve injuries occur in approximately 5-10% of head-injured patients, a good history and physical examination is important to differentiate IFP from another etiology. Newer generation high-resolution computed tomography (CT) scans are commonly demonstrating these fractures. An understanding of this complication, appropriate patient follow-up, and early involvement of the Otolaryngologist is important in management of these patients. The mechanism as well as the timing of facial nerve paralysis will determine the proper evaluation, consultation, and management for the patient. Patients with total or immediate paralysis as well as those with poorly prognostic audiogram results are good candidates for surgical repair.

  12. Photometric Modelling of Close Binary Star CN And

    Indian Academy of Sciences (India)

    D. M. Z. Jassur; A. Khodadadi

    2006-03-01

    The results of two color photometry of active close binary CN And are presented and analyzed. The light curves of the system are obviously asymmetric, with the primary maximum brighter than the secondary maximum, which is known as the O’Conell effect. The most plausible explanation of the asymmetry is expected to be due to spot activity of the primary component. For the determination of physical and geometrical parameters, the most new version of W–D code was used, but the presence of asymmetry prevented the convergence of the method when the whole light curves were used. The solutions were obtained by applying mode 3 of W–D code to the first half of the light curves, assuming synchronous rotation and zero eccentricity. Absolute parameters of the system were obtained from combining the photometric solution with spectroscopic data obtained from radial velocity curve analysis. The results indicate the poor thermal contact of the components and transit primary minimum. Finally the O–C diagram was analyzed. It was found that the orbital period of the system is changing with a rate of / = -2.2(6) × 10-10 which corresponds to mass transfer from more massive component to less massive with the rate of / ∼ 4.82 × 10-88sun/year.

  13. SIMULATION SYSTEM FOR FIVE-AXIS NC MACHINING USING GENERAL CUTTING TOOL

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A simulation system for five-axis NC machining using general cutting tools is presented. This system differs from other simulation system in that it not only focuses on the geometric simulation but also focuses on the collision detection which is usually not included in NC machining simulation. Besides all of these, estimating cutting forces is also discussed. In order to obtain high efficiency, all algorithms use swept volume modeling technique, so the simulation system is compact and can be performed efficiently.

  14. Removal of aqueous nC60 fullerene from water by low pressure membrane filtration.

    Science.gov (United States)

    Floris, R; Nijmeijer, K; Cornelissen, E R

    2016-03-15

    The potential environmental and health risks of engineered nanoparticles such as buckminsterfullerene C60 in water require their removal during the production of drinking water. We present a study focusing on (i) the removal mechanism and (ii) the elucidation of the role of the membrane pore size during removal of nC60 fullerene nanoparticle suspensions in dead-end microfiltration and ultrafiltration mimicking separation in real industrial water treatment plants. Membranes were selected with pore sizes ranging from 18 nm to 500 nm to determine the significance of the nC60 to membrane pore size ratio and the adsorption affinity between nC60 and membrane material during filtration. Experiments were carried out with a dead-end bench-scale system operated at constant flux conditions including a hydraulic backwash cleaning procedure. nC60 nanoparticles can be efficiently removed by low pressure membrane technology with smaller and, unexpectedly, also by mostly similar or larger pores than the particle size, although the nC60 filtration behaviour appeared to be different. The nC60 size to membrane pore size ratio and the ratio of the cake-layer deposition resistance to the clean membrane resistance, both play an important role on the nC60 filtration behaviour and on the efficiency of the backwash procedure recovering the initial membrane filtration conditions. These results become specifically significant in the context of drinking water production, for which they provide relevant information for an accurate selection between membrane processes and operational parameters for the removal of nC60 in the drinking water treatment.

  15. Silver Blaze Puzzle in 1/Nc Expansions of Cold and Dense QCD Matter

    CERN Document Server

    Armoni, Adi

    2014-01-01

    We consider quantum chromodynamics (QCD) with Nc colors and Nf quark flavors at finite quark chemical potential mu_q or isospin chemical potential mu_I. We specifically address the nature of the ``Silver Blaze'' behavior in the framework of 1/Nc expansion. Starting with the QCD partition function, we implement Veneziano's Nf/Nc expansion to identify the density onset. We find the baryon mass M_B and the pion mass m_pi appearing from different order of Veneziano's expansion. We argue that the confining properties are responsible for the Silver Blaze in the region of m_pi/2 < mu_q < M_B/Nc. We point out, however, that Veneziano's expansion brings about a puzzling subtlety along the same line as the baryon problem in finite-density quenched simulations. We emphasize that the large-Nc limit can allow for the physical ordering of M_B and m_pi thanks to the similarity to the quenched approximation, while the unphysical ghost quarks contaminate the baryon sector if Nc is finite. We also discuss the ``orientifo...

  16. The baryon vector current in the combined chiral and 1/Nc expansions

    CERN Document Server

    Flores-Mendieta, Ruben

    2014-01-01

    The baryon vector current is computed at one-loop order in large-Nc baryon chiral perturbation theory, where Nc is the number of colors. Loop graphs with octet and decuplet intermediate states are systematically incorporated into the analysis and the effects of the decuplet-octet mass difference and SU(3) flavor symmetry breaking are accounted for. There are large-Nc cancellations between different one-loop graphs as a consequence of the large-Nc spin-flavor symmetry of QCD baryons. The results are compared against the available experimental data through several fits in order to extract information about the unknown parameters. The large-Nc baryon chiral perturbation theory predictions are in very good agreement both with the expectations from the 1/Nc expansion and with the experimental data. The effect of SU(3) flavor symmetry breaking for the |Delta S|=1 vector current form factors f1(0) results in a reduction by a few percent with respect to the corresponding SU(3) symmetric values.

  17. The baryon vector current in the combined chiral and 1/Nc expansions

    Energy Technology Data Exchange (ETDEWEB)

    Flores-Mendieta, Ruben; Goity, Jose L [JLAB

    2014-12-01

    The baryon vector current is computed at one-loop order in large-Nc baryon chiral perturbation theory, where Nc is the number of colors. Loop graphs with octet and decuplet intermediate states are systematically incorporated into the analysis and the effects of the decuplet-octet mass difference and SU(3) flavor symmetry breaking are accounted for. There are large-Nc cancellations between different one-loop graphs as a consequence of the large-Nc spin-flavor symmetry of QCD baryons. The results are compared against the available experimental data through several fits in order to extract information about the unknown parameters. The large-Nc baryon chiral perturbation theory predictions are in very good agreement both with the expectations from the 1/Nc expansion and with the experimental data. The effect of SU(3) flavor symmetry breaking for the |Delta S|=1 vector current form factors f1(0) results in a reduction by a few percent with respect to the corresponding SU(3) symmetric values.

  18. A novel denitrifying methanotroph of the NC10 phylum and its microcolony

    Science.gov (United States)

    He, Zhanfei; Cai, Chaoyang; Wang, Jiaqi; Xu, Xinhua; Zheng, Ping; Jetten, Mike S. M.; Hu, Baolan

    2016-09-01

    The NC10 phylum is a candidate phylum of prokaryotes and is considered important in biogeochemical cycles and evolutionary history. NC10 members are as-yet-uncultured and are difficult to enrich, and our knowledge regarding this phylum is largely limited to the first species ‘Candidatus Methylomirabilis oxyfera’ (M. oxyfera). Here, we enriched NC10 members from paddy soil and obtained a novel species of the NC10 phylum that mediates the anaerobic oxidation of methane (AOM) coupled to nitrite reduction. By comparing the new 16S rRNA gene sequences with those already in the database, this new species was found to be widely distributed in various habitats in China. Therefore, we tentatively named it ‘Candidatus Methylomirabilis sinica’ (M. sinica). Cells of M. sinica are roughly coccus-shaped (0.7–1.2 μm), distinct from M. oxyfera (rod-shaped; 0.25–0.5 × 0.8–1.1 μm). Notably, microscopic inspections revealed that M. sinica grew in honeycomb-shaped microcolonies, which was the first discovery of microcolony of the NC10 phylum. This finding opens the possibility to isolate NC10 members using microcolony-dependent isolation strategies.

  19. A novel denitrifying methanotroph of the NC10 phylum and its microcolony.

    Science.gov (United States)

    He, Zhanfei; Cai, Chaoyang; Wang, Jiaqi; Xu, Xinhua; Zheng, Ping; Jetten, Mike S M; Hu, Baolan

    2016-01-01

    The NC10 phylum is a candidate phylum of prokaryotes and is considered important in biogeochemical cycles and evolutionary history. NC10 members are as-yet-uncultured and are difficult to enrich, and our knowledge regarding this phylum is largely limited to the first species 'Candidatus Methylomirabilis oxyfera' (M. oxyfera). Here, we enriched NC10 members from paddy soil and obtained a novel species of the NC10 phylum that mediates the anaerobic oxidation of methane (AOM) coupled to nitrite reduction. By comparing the new 16S rRNA gene sequences with those already in the database, this new species was found to be widely distributed in various habitats in China. Therefore, we tentatively named it 'Candidatus Methylomirabilis sinica' (M. sinica). Cells of M. sinica are roughly coccus-shaped (0.7-1.2 μm), distinct from M. oxyfera (rod-shaped; 0.25-0.5 × 0.8-1.1 μm). Notably, microscopic inspections revealed that M. sinica grew in honeycomb-shaped microcolonies, which was the first discovery of microcolony of the NC10 phylum. This finding opens the possibility to isolate NC10 members using microcolony-dependent isolation strategies. PMID:27582299

  20. Ion beam analysis, corrosion resistance and nanomechanical properties of TiAlCN/CN{sub x} multilayer grown by reactive magnetron sputtering

    Energy Technology Data Exchange (ETDEWEB)

    Alemón, B.; Flores, M. [Departamento de Ingeniería de Proyectos, CUCEI, Universidad de Guadalajara, J. Guadalupe Zuno 48, Los Belenes, Zapopan, Jal. 45101 (Mexico); Canto, C. [Instituto de Física, UNAM, Avenida de la Investigación S/N, Coyoacán, Mexico, DF 04510 (Mexico); Andrade, E., E-mail: andrade@fisica.unam.mx [Instituto de Física, UNAM, Avenida de la Investigación S/N, Coyoacán, Mexico, DF 04510 (Mexico); Lucio, O.G. de [Instituto de Física, UNAM, Avenida de la Investigación S/N, Coyoacán, Mexico, DF 04510 (Mexico); Rocha, M.F. [ESIME-Z, Instituto Politécnico Nacional, ALM Zacatenco, Mexico, DF 07738 (Mexico); Broitman, E. [Thin Films Physics Division, IFM, Linköping University, SE-58183 Linköping (Sweden)

    2014-07-15

    A novel TiAlCN/CN{sub x} multilayer coating, consisting of nine TiAlCN/CN{sub x} periods with a top layer 0.5 μm of CN{sub x}, was designed to enhance the corrosion resistance of CoCrMo biomedical alloy. The multilayers were deposited by dc and RF reactive magnetron sputtering from Ti{sub 0.5}Al{sub 0.5} and C targets respectively in a N{sub 2}/Ar plasma. The corrosion resistance and mechanical properties of the multilayer coatings were analyzed and compared to CoCrMo bulk alloy. Ion beam analysis (IBA) and X-ray diffraction tests were used to measure the element composition profiles and crystalline structure of the films. Corrosion resistance was evaluated by means of potentiodynamic polarization measurements using simulated body fluid (SBF) at typical body temperature and the nanomechanical properties of the multilayer evaluated by nanoindentation tests were analyzed and compared to CoCrMo bulk alloy. It was found that the multilayer hardness and the elastic recovery are higher than the substrate of CoCrMo. Furthermore the coated substrate shows a better general corrosion resistance than that of the CoCrMo alloy alone with no observation of pitting corrosion.

  1. An extended source for CN jets in Comet P/Halley

    Science.gov (United States)

    Klavetter, James Jay; A'Hearn, Michael F.

    1994-01-01

    We examined radial intensity profiles of CN jets in comparison with the diffuse, isotropic component of the CN coma of Comet P/Halley. All images were bias-subtracted, flat-fielded, and continuum-subtracted. We calculated the diffuse profiles by finding the azimuthal mean of the coma least contaminated by jets yielding profiles similar to those of vectorial and Haser models of simple photodissociation. We found the jet profiles by calculating a mean around a Gaussian-fitted center in r-theta space. There is an unmistakable difference between the profiles of the CN jets and the profiles of the diffuse CN. Spatial derivatives of these profiles, corrected for geometrical expansion, show that the diffuse component is consistent with a simple photodissociation process, but the jet component is not. The peak production of the jet profile occurs 6000 km from the nucleus at a heliocentric distance of 1.4 AU. Modeling of both components of the coma indicate results that are consistent with the diffuse CN photochemically produced, but the CN jets need an additional extended source. We found that about one-half of the CN in the coma of Comet P/Halley originated from the jets, the rest from the diffuse component. These features, along with the width of the jet being approximately constant, are consistent with a CHON grain origin for the jets.

  2. High 36Cl/Cl ratios in Chernobyl groundwater

    International Nuclear Information System (INIS)

    After the explosion of the Chernobyl Nuclear Power Plant in April 1986, contaminated material was buried in shallow trenches within the exclusion zone. A 90Sr plume was evidenced downgradient of one of these trenches, trench T22. Due to its conservative properties, 36Cl is investigated here as a potential tracer to determine the maximal extent of the contamination plume from the trench in groundwater. 36Cl/Cl ratios measured in groundwater, trench soil water and leaf leachates are 1–5 orders of magnitude higher than the theoretical natural 36Cl/Cl ratio. This contamination occurred after the Chernobyl explosion and currently persists. Trench T22 acts as an obvious modern point source of 36Cl, however other sources have to be involved to explain such contamination. 36Cl contamination of groundwater can be explained by dilution of trench soil water by uncontaminated water (rainwater or deep groundwater). With a plume extending further than that of 90Sr, radionuclide which is impacted by retention and decay processes, 36Cl can be considered as a suitable tracer of contamination from the trench in groundwater provided that modern release processes of 36Cl from trench soil are better characterized. - Highlights: • High 36Cl/Cl ratios measured in the Chernobyl Pilot Site groundwater. • Trench T22 acts as a modern source of groundwater contamination by 36Cl but other sources are involved. • Contamination results from dilution of a contaminated “T22” soil water with rainwater. • Processes involved in the modern release need to be investigated

  3. Design and Investigation of SST/nc-Si:H/M (M = Ag, Au, Ni and M/nc-Si:H/M Multifunctional Devices

    Directory of Open Access Journals (Sweden)

    A. F. Qasrawi

    2013-01-01

    Full Text Available Hydrogenated nanocrystalline Silicon thin films prepared by the very high frequency chemical vapor deposition technique (VHF-CVD on stainless steel (SST substrates are used to design Schottky point contact barriers for the purpose of solar energy conversion and passive electronic component applications. In this process, the contact performance between SST and M (M = Ag, Au, and Ni and between Ag, Au, and Ni electrodes was characterized by means of current-voltage, capacitance-voltage, and light intensity dependence of short circuit ( current and open circuit voltage ( of the contacts. Particularly, the devices ideality factors, barrier heights were evaluated by the Schottky method and compared to the Cheung's. Best Schottky device performance with lowest ideality factor suitable for electronic applications was observed in the SST/nc-Si:H/Ag structure. This device reflects a of 229 mV with an of 1.6 mA/cm2 under an illumination intensity of ~40 klux. On the other hand, the highest being 9.0 mA/cm2 and the of 53.1 mV were observed for Ni/nc-Si:H/Au structure. As these voltages represent the maximum biasing voltage for some of the designed devices, the SST/nc-Si:H/M and M/nc-Si:H/M can be regarded as multifunctional self-energy that provided electronic devices suitable for active or passive applications.

  4. Fe(CN){sub 6}{sup 3-}/Fe(CN){sub 6}{sup 4-} redox in the interlayer determined by the charge density of Zn{sub n}Cr-layered double hydroxides

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Jia; Xu, Yunfeng; Liu, Jiangyong; Zhou, Jizhi [School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444 (China); Xu, Zhi Ping, E-mail: gordonxu@uq.edu.au [ARC Centre of Excellence for Functional Nanomaterials, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD 4072 (Australia); Qian, Guangren, E-mail: grqian@shu.edu.cn [School of Environmental and Chemical Engineering, Shanghai University, No. 333 Nanchen Rd, Shanghai 200444 (China)

    2013-02-15

    Redox of Fe(CN){sub 6}{sup 3-} and Fe(CN){sub 6}{sup 4-} in the ZnCr layered double hydroxide interlayer has been investigated. The conversion from Fe(CN){sub 6}{sup 3-} to Fe(CN){sub 6}{sup 4-} or from Fe(CN){sub 6}{sup 4-} to Fe(CN){sub 6}{sup 3-} in the ZnCr-LDH interlayer has been confirmed, depending on the Zn:Cr molar ratio. Both Fe(CN){sub 6}{sup 3-} and Fe(CN){sub 6}{sup 4-} are observed in all samples no matter whether the initial anion is Fe(CN){sub 6}{sup 3-} or Fe(CN){sub 6}{sup 4-} before precipitation. Deconvolution of the FTIR band around 2100 cm{sup -1} reveals that the relative amount of Fe(CN){sub 6}{sup 4-} and Fe(CN){sub 6}{sup 3-} in the LDH interlayer is considerably dependent on the Zn:Cr molar ratio. In brief, Fe(CN){sub 6}{sup 4-} is preferred at the ratio of 2:1 while there is more Fe(CN){sub 6}{sup 3-} in the ratio of 4:1. Therefore, it is our hypothesis that the charge density of the hydroxide layer is a key factor that directs the redox of Fe(CN){sub 6}{sup 3-}/Fe(CN){sub 6}{sup 4-}. The possible redox processes have also been proposed. - Graphical abstract: Redox reactions of Fe(CN){sub 6}{sup 3-} and Fe(CN){sub 6}{sup 4-} take place in the ZnCr layered double hydroxide (LDH) interlayer, which are reflected by Fe(CN){sub 6}{sup 3-}/Fe(CN){sub 6}{sup 4-} FTIR area ratio. Highlights: Black-Right-Pointing-Pointer An interlayer redox phenomena was observed in Fe(CN){sub 6}{sup 3/4-} intercalated ZnCr-LDHs. Black-Right-Pointing-Pointer The ratio of interlayer redox was examined by FTIR fitting analysis. Black-Right-Pointing-Pointer The tendency of redox was influenced by Zn:Cr molar ratio. Black-Right-Pointing-Pointer The mechanism relies on the charge density of metal hydroxyl layer.

  5. H-D exchange in metal carbene complexes: Structure of cluster (μ-H)(μ-OCD3)Os3(CO)9{:C(CD3)NC2H8O}

    Science.gov (United States)

    Savkov, Boris; Maksakov, Vladimir; Kuratieva, Natalia

    2015-10-01

    X-ray and spectroscopic data for the new complex (μ-H)(μ-OCH3)Os3(CO)9{:C(CD3)NC2H8O} (2) obtained in the reaction of the (μ-H)(μ-Cl)Os3(CO)9{:C(CH3)NC2H8O} (1) with NaOCD3 in CD3OD solution are reported. It is shown that cluster 1 has the property of CH-acidity inherent of Fisher type carbenes. This had demonstrated using hydrogen deuterium exchange reaction in the presence of a strong base. Bridging chlorine to metoxide ligand substitution takes place during the reaction. The molecular structure of 2 is compared with known analogues.

  6. 75 FR 30740 - Airworthiness Directives; Bombardier, Inc. Model CL-600-2B16 (CL-604 Variants (Including CL-605...

    Science.gov (United States)

    2010-06-02

    ... Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic impact, positive or... Directives; Bombardier, Inc. Model CL-600-2B16 (CL- 604 Variants (Including CL-605 Marketing Variant... addition to Bombardier Inc. Models CL-600-2B19, CL-600-2C10 and CL-600-2D24. The latter three models...

  7. A new Leray formula for smooth functions on bounded domains in Cn

    Institute of Scientific and Technical Information of China (English)

    YAO; Zongyuan(姚宗元); QIU; Chunhui(邱春晖); ZHONG; Chunping

    2002-01-01

    By means of a new technique of integral representations in Cn given by the authors, we establish a new abstract formula with a vector function W for smooth functions on bounded domains in Cn, which is different from the well-known Leray formula, This new formula eliminates the term that contains the parameter λ from the classical Leray formula, and especially on some domains the uniform estimates for the -equation are very simple. From the new Leray formula, we can obtain correspondingly many new formulas for smooth functions on many domains in Cn, which are different from the classical ones, when we properly select the vector function W.

  8. 76 FR 477 - Airworthiness Directives; Bombardier, Inc. Model CL-600-2A12 (CL-601) and CL-600-2B16 (CL-601-3A...

    Science.gov (United States)

    2011-01-05

    ... Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic.... Model CL-600-2A12 (CL- 601) and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) Airplanes AGENCY... applicability of the directive for CL-600-2A12 aircraft, serial numbers 3001 through 3066, and for CL-...

  9. 76 FR 66203 - Airworthiness Directives; Bombardier, Inc. Model CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604...

    Science.gov (United States)

    2011-10-26

    ... Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic.... Model CL-600-2B16 (CL- 601-3A, CL-601-3R, and CL-604 Variants) Airplanes AGENCY: Federal Aviation... Bombardier, Inc. Model CL-600-2B16 (CL- 601-3A, CL-601-3R, and CL-604 Variants) airplanes, certificated...

  10. Synthesis and Crystal Structure of a Cyano-bridged Bimetallic Complex[La(DMSO)3(H2O)3Cr(CN)6]·H2O (DMSO = Dimethylsulfoxide) with One-dimensional Chain Molecular Structure

    Institute of Scientific and Technical Information of China (English)

    梁淑惠; 车云霞; 郑吉民

    2004-01-01

    The title complex [La(DMSO)3(H2O)3Cr(CN)6](H2O was obtained by the reaction of LaCl3(7H2O, DMSO and K3[Cr(CN)6] in aqueous solution on a hot water bath. The crystal crystallizes in orthorhombic, space group P212121 with a = 9.827(3), b = 15.037(4), c = 17.633(5)A, C12H26CrLaN6O7S3, Mr = 653.48, Z = 4, V = 2605.7(13) A3, Dc = 1.666 g/m3, μ (MoKα) = 2.314 mm-1, F(000) = 1300, R = 0.0205 and wR = 0.0481 for 5038 observed reflections (I > 2σ(I)). La3+ ion is eight-coordinated by three DMSO molecules, three H2O molecules and two [Cr(CN)6]3- units. The structure of the title complex possesses a cyano-bridged onedimensional zigzag chain structure with alternating La(DMSO)3(H2O)3 and Cr(CN)6 moieties, which are linked by some hydrogen bonds to form a 3D network structure.

  11. 76 FR 6536 - Airworthiness Directives; Bombardier, Inc. Model CL-215-1A10 (CL-215), CL-215-6B11 (CL-215T...

    Science.gov (United States)

    2011-02-07

    ... products. That NPRM was published in the Federal Register on November 9, 2010 (75 FR 68728). That NPRM... Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant.... Model CL-215-1A10 (CL- 215), CL-215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant)...

  12. CN Anomalies in the Halo System and the Origin of Globular Clusters in the Milky Way

    CERN Document Server

    Carollo, Daniela; Beers, Timothy; Freeman, Ken

    2013-01-01

    We explore the kinematics and orbital properties of a sample of red giants in the halo system of the Milky Way that are thought to have formed in globular clusters, based on their anomalously strong UV/blue CN bands. The orbital parameters of the CN-strong halo stars are compared to those of the inner- and outer-halo populations as described by Carollo et al., and to the orbital parameters of globular clusters with well-studied Galactic orbits. The CN-strong field stars and the globular clusters both exhibit kinematics and orbital properties similar to the inner-halo population, indicating that stripped or destroyed globular clusters could be a significant source of inner-halo field stars, and suggesting that both the CN-strong stars and the majority of globular clusters are primarily associated with this population.

  13. On the Coefficients Problem of Quasi-convex Mappings and Starlike Mapppings in Cn

    Institute of Scientific and Technical Information of China (English)

    LIUWei-xian; WANGYu-min

    2003-01-01

    Let Bn be the unit ball in Cn, we study quasi-convex mappings and starlike mappings on Bn.The upper bounds of second order item coefficients ofr quasi-convex mappings and starlike mappings are obtained.

  14. Achieving C-N bond cleavage in dinuclear metal cyanide complexes.

    Science.gov (United States)

    Cavigliasso, Germán; Christian, Gemma J; Stranger, Robert; Yates, Brian F

    2011-07-28

    Cleavage of cyanide is more difficult to achieve compared to dinitrogen and carbon monoxide, even though these species contain triple bonds of greater strength. In this work, we have used computational methods to investigate thermodynamic and mechanistic aspects of the C-N bond cleavage process in [L(3)M-CN-M'L(3)] systems consisting of a central cyanide unit bound in an end-on fashion to two terminal metal tris-amide complexes. In these systems, [M] is a d(3) transition metal from the 3d, 4d, 5d, or 6d series and groups 4 through 7, and [L] is either [NH(2)], [NMe(2)], [N(i)PrPh], or [N(t)BuAr]. A comparison of various models for the experimentally relevant [L(3)Mo-CN-MoL(3)] system has shown that while the C-N cleavage step appears to be an energetically favourable process, a large barrier exists for the dissociation of [L(3)Mo-CN-MoL(3)]((-)) into [L(3)Mo-C]((-)) and [N-MoL(3)], which possibly explains why C-N bond scission is not observed experimentally. The general structural, bonding, and thermochemical trends across the transition metal series investigated, indicate that the systems exhibiting the greatest degree of C-N activation, and most favourable energetics for C-N cleavage, also possess the most favourable electronic properties, namely, a close match between the relevant π-like orbitals on the metal-based and cyanide fragments. The negative charge on the cyanide fragment leads to significant destabilization of the π* level which needs to be populated through back-donation from the metal centres in order for C-N bond scission to be achieved. Therefore, metal-based systems with high-lying d(π) orbitals are best suited to C-N cleavage. In terms of chemical periodicity, these systems can be identified as the heavier members within a group and the earlier members within a period. As a consequence, Mo complexes are not well suited to cleaving the C-N bond, whereas the Ta analogues are the most favourable systems and should, in principle, be capable of

  15. CN molecule collisions with H+ at a wide range of astrophysical energies

    OpenAIRE

    Sultanova, Madina R.; Guster, Dennis

    2012-01-01

    We analyze the quantum-mechanical rotational excitation/de-excitation spectrum and cross sections of CN molecules during low and high-energy collisions with protons, H+. The problem is of significant importance in astrophysics of the early Universe, specifically connected with the problems of cosmic microwave background (CMB) radiation. A quantum-mechanical close-coupling method is applied in this work. The cyanide molecule (CN) is treated as a rigid rotor, i.e. the distance between the carbo...

  16. InterProScan Result: CN375685 [KAIKOcDNA[Archive

    Lifescience Database Archive (English)

    Full Text Available CN375685 CN375685_1_ORF2 6541062F4B100B1C PANTHER PTHR23115:SF31 ELONGATION FACTOR ...TU (EF-TU) 3.5e-31 T IPR004541 Translation elongation factor EFTu/EF1A, bacterial/organelle Molecular Function: translation elong...r Component: intracellular (GO:0005622)|Biological Process: translational elongation (GO:0006414) ...

  17. Vibrational emission analysis of the CN molecules in laser-induced breakdown spectroscopy of organic compounds

    International Nuclear Information System (INIS)

    Laser-induced breakdown spectroscopy (LIBS) of organic materials is based on the analysis of atomic and ionic emission lines and on a few molecular bands, the most important being the CN violet system and the C2 Swan system. This paper is focused in molecular emission of LIBS plasmas based on the CN (B2Σ–X2Σ) band, one of the strongest emissions appearing in all carbon materials when analyzed in air atmosphere. An analysis of this band with sufficient spectral resolution provides a great deal of information on the molecule, which has revealed that valuable information can be obtained from the plume chemistry and dynamics affecting the excitation mechanisms of the molecules. The vibrational emission of this molecular band has been investigated to establish the dependence of this emission on the molecular structure of the materials. The paper shows that excitation/emission phenomena of molecular species observed in the plume depend strongly on the time interval selected and on the irradiance deposited on the sample surface. Precise time resolved LIBS measurements are needed for the observation of distinctive CN emission. For the organic compounds studied, larger differences in the behavior of the vibrational emission occur at early stages after plasma ignition. Since molecular emission is generally more complex than that involving atomic emission, local plasma conditions as well as plume chemistry may induce changes in vibrational emission of molecules. As a consequence, alterations in the distribution of the emissions occur in terms of relative intensities, being sensitive to the molecular structure of every single material. - Highlights: • Vibrational emission of CN species in laser-induced plasmas has been investigated. • Distribution of vibrational emission of CN has been found to be time dependent. • Laser irradiance affects the vibrational distribution of the CN molecules. • Plume chemistry controls the excitation mechanisms of CN molecules in the

  18. ClEST cluster :Cl_singleton0355 [ClEST

    Lifescience Database Archive (English)

    Full Text Available Cl_singleton0355 acyl- synthetase long- isoform b Cimex lectularius nuclear gene 19...GGAAGGTGCATTGGGAGCAATAAAAGCGATCGCATTTGTCTGTGATATCATCACTTATCCAGTGTACCTTATTCTACAACGGCCATGGG fb18010 1 acyl-CoA synthetase [Gl

  19. ClEST cluster :Cl_singleton0763 [ClEST

    Lifescience Database Archive (English)

    Full Text Available Cl_singleton0763 aldo-keto reductase Cimex lectularius nuclear gene 591 CACCGGGTAGG...GTGAATAAAGGCTTAGTTAGGTCAATCGGACTATCCAATTTCAACAAAAGACAGATCGAAGATGTTT fs09012 1 aldo-keto reductase [Gl

  20. Polarization memory effect in the photoluminescence of nc-Si-SiOx light-emitting structures

    Science.gov (United States)

    Michailovska, Katerina; Indutnyi, Ivan; Shepeliavyi, Petro; Sopinskyy, Mykola

    2016-06-01

    The polarization memory (PM) effect in the photoluminescence (PL) of the porous nc-Si-SiOx light-emitting structures, containing nanoparticles of silicon (nc-Si) in the oxide matrix and passivated in a solution of hydrofluoric acid (HF), has been investigated. The studied nc-Si-SiOx structures were produced by evaporation of Si monoxide (SiO) powder in vacuum and oblique deposition on Si wafer, and then the deposited silicon oxide (SiOx) films were annealed in the vacuum at 975 °C to grow nc-Si. It was found that the PM effect in the PL is observed only after passivation of nanostructures: during etching in HF solution, the initial symmetric nc-Si becomes asymmetric elongated. It was also found that in investigated nanostructures, there is a defined orientational dependence of the PL polarization degree ( ρ) in the sample plane which correlates with the orientation of SiOx nanocolumns, forming the structure of the porous layer. The increase of the ρ values in the long-wavelength spectral range with time of HF treatment can be associated with increasing of the anisotropy of large Si nanoparticles. The PM effect for this spectral interval can be described by the dielectric model. In the short-wavelength spectral range, the dependence of the ρ values agrees qualitatively with the quantum confinement effect.

  1. Polarized photoluminescence of nc-Si–SiO{sub x} nanostructures

    Energy Technology Data Exchange (ETDEWEB)

    Michailovska, E. V.; Indutnyi, I. Z.; Shepeliavyi, P. E.; Sopinskii, N. V., E-mail: sopinsky@isp.kiev.ua, E-mail: sopinskyy@ua.fm [National Academy of Sciences of Ukraine, Lashkarev Institute of Semiconductor Physics (Ukraine)

    2016-01-15

    The effect of photoluminescence polarization memory in nc-Si–SiO{sub x} light-emitting structures containing Si nanoparticles (nc-Si) in an oxide matrix is for the first time studied. The polarization properties of continuous and porous nanostructures passivated in HF vapors (or solutions) are studied. It is established that the polarization memory effect is manifested only after treatment of the structures in HF. The effect is also accompanied by a shift of the photoluminescence peak to shorter wavelengths and by a substantial increase in the photoluminescence intensity. It is found that, in anisotropic nc-Si–SiO{sub x} samples produced by oblique deposition in vacuum, the degree of linear photoluminescence polarization in the sample plane exhibits a noticeable orientation dependence and correlates with the orientation of SiO{sub x} nanocolumns forming the structure of the porous layer. These effects are attributed to the transformation of symmetrically shaped Si nanoparticles into asymmetric elongated nc-Si particles upon etching in HF. In continuous layers, nc-Si particles are oriented randomly, whereas in porous structures, their preferential orientation coincides with the orientation of oxide nanocolumns.

  2. nC60 deposition kinetics: the complex contribution of humic acid, ion concentration, and valence.

    Science.gov (United States)

    McNew, Coy P; LeBoeuf, Eugene J

    2016-07-01

    The demonstrated toxicity coupled with inevitable environmental release of nC60 raise serious concerns about its environmental fate and transport, therefore it is crucial to understand how nC60 will interact with subsurface materials including attached phase soil and sediment organic matter (AP-SOM). This study investigated the attachment of nC60 onto a Harpeth humic acid (HHA) coated silica surface under various solution conditions using a quartz crystal microbalance with dissipation monitoring. The HHA coating greatly enhanced nC60 attachment at low ion concentrations while hindering attachment at high ion concentrations in the presence of both mono and divalent cations. At low ion concentrations, the HHA greatly reduced the surface potential of the silica, enhancing nC60 deposition through reduction in the electrostatic repulsion. At high ion concentrations however, the reduced surface potential became less important due to the near zero energy barrier to deposition and therefore non-DLVO forces dominated, induced by compaction of the HHA layer, and leading to hindered attachment. In this manner, observed contributions from the HHA layer were more complex than previously reported and by monitoring surface charge and calculated DLVO interaction energy alongside attachment experiments, this study advances the mechanistic understanding of the variable attachment contributions from the humic acid layer. PMID:27061365

  3. Polarization memory effect in the photoluminescence of nc-Si-SiOx light-emitting structures.

    Science.gov (United States)

    Michailovska, Katerina; Indutnyi, Ivan; Shepeliavyi, Petro; Sopinskyy, Mykola

    2016-12-01

    The polarization memory (PM) effect in the photoluminescence (PL) of the porous nc-Si-SiOx light-emitting structures, containing nanoparticles of silicon (nc-Si) in the oxide matrix and passivated in a solution of hydrofluoric acid (HF), has been investigated. The studied nc-Si-SiOx structures were produced by evaporation of Si monoxide (SiO) powder in vacuum and oblique deposition on Si wafer, and then the deposited silicon oxide (SiOx) films were annealed in the vacuum at 975 °C to grow nc-Si. It was found that the PM effect in the PL is observed only after passivation of nanostructures: during etching in HF solution, the initial symmetric nc-Si becomes asymmetric elongated. It was also found that in investigated nanostructures, there is a defined orientational dependence of the PL polarization degree (ρ) in the sample plane which correlates with the orientation of SiOx nanocolumns, forming the structure of the porous layer. The increase of the ρ values in the long-wavelength spectral range with time of HF treatment can be associated with increasing of the anisotropy of large Si nanoparticles. The PM effect for this spectral interval can be described by the dielectric model. In the short-wavelength spectral range, the dependence of the ρ values agrees qualitatively with the quantum confinement effect.

  4. Polarization memory effect in the photoluminescence of nc-Si-SiOx light-emitting structures.

    Science.gov (United States)

    Michailovska, Katerina; Indutnyi, Ivan; Shepeliavyi, Petro; Sopinskyy, Mykola

    2016-12-01

    The polarization memory (PM) effect in the photoluminescence (PL) of the porous nc-Si-SiOx light-emitting structures, containing nanoparticles of silicon (nc-Si) in the oxide matrix and passivated in a solution of hydrofluoric acid (HF), has been investigated. The studied nc-Si-SiOx structures were produced by evaporation of Si monoxide (SiO) powder in vacuum and oblique deposition on Si wafer, and then the deposited silicon oxide (SiOx) films were annealed in the vacuum at 975 °C to grow nc-Si. It was found that the PM effect in the PL is observed only after passivation of nanostructures: during etching in HF solution, the initial symmetric nc-Si becomes asymmetric elongated. It was also found that in investigated nanostructures, there is a defined orientational dependence of the PL polarization degree (ρ) in the sample plane which correlates with the orientation of SiOx nanocolumns, forming the structure of the porous layer. The increase of the ρ values in the long-wavelength spectral range with time of HF treatment can be associated with increasing of the anisotropy of large Si nanoparticles. The PM effect for this spectral interval can be described by the dielectric model. In the short-wavelength spectral range, the dependence of the ρ values agrees qualitatively with the quantum confinement effect. PMID:27255897

  5. Delta I=1/2 and ε'ε in Large-Nc QCD

    International Nuclear Information System (INIS)

    We present new results for the matrix elements of the Q6 and Q4 penguin operators, evaluated in a large-Nc approach which incorporates important O(Nc2/{nf}{Nc}) unfactorized contributions. Our approach shows analytic matching between short- and long-distance scale dependences within dimensional renormalization schemes, such as MS-bar. Numerically, we find that there is a large positive contribution to the Delta I =1/2 matrix element of Q6 and hence to the direct CP-violation parameter epsilon'/epsilon. We also present results for the Delta I = 1/2 rule in K→ππ amplitudes, which incorporate the related and important 'eye-diagram' contributions of O(Nc2/{1}/{Nc}) from the Q2 operator (i.e. the penguin-like contraction). The results lead to an enhancement of the Delta I = 1/2 effective coupling. The origin of the large unfactorized contributions which we find is discussed in terms of the relevant scales of the problem. (author)

  6. Study on re-sputtering during CN{sub x} film deposition through spectroscopic diagnostics of plasma

    Energy Technology Data Exchange (ETDEWEB)

    Liang, Peipei; Yang, Xu; Li, Hui; Cai, Hua [Department of Optical Science and Engineering, Fudan University, Shanghai 200433 (China); Sun, Jian; Xu, Ning [Department of Optical Science and Engineering, Fudan University, Shanghai 200433 (China); Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Fudan University, Shanghai 200433 (China); Wu, Jiada, E-mail: jdwu@fudan.edu.cn [Department of Optical Science and Engineering, Fudan University, Shanghai 200433 (China); Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Fudan University, Shanghai 200433 (China); Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University, Shanghai 200433 (China)

    2015-10-15

    A nitrogen-carbon plasma was generated during the deposition of carbon nitride (CN{sub x}) thin films by pulsed laser ablation of a graphite target in a discharge nitrogen plasma, and the optical emission of the generated nitrogen-carbon plasma was measured for the diagnostics of the plasma and the characterization of the process of CN{sub x} film deposition. The nitrogen-carbon plasma was recognized to contain various species including nitrogen molecules and molecular ions excited in the ambient N{sub 2} gas, carbon atoms and atomic ions ablated from the graphite target and CN radicals. The temporal evolution and spatial distribution of the CN emission and their dependence on the substrate bias voltage show two groups of CN radicals flying in opposite directions. One represents the CN radicals formed as the products of the reactions occurring in the nitrogen-carbon plasma, revealing the reactive deposition of CN{sub x} film due to the reactive expansion of the ablation carbon plasma in the discharge nitrogen plasma and the effective formation of gaseous CN radicals as precursors for CN{sub x} film growth. The other one represents the CN radicals re-sputtered from the growing CN{sub x} film by energetic plasma species, evidencing the re-sputtering of the growing film accompanying film growth. And, the re-sputtering presents ion-induced sputtering features.

  7. Comparing CN and CH Line Strengths in a Homogeneous Spectroscopic Sample of 8 Galactic Globular Clusters

    CERN Document Server

    Kayser, Andrea; Grebel, Eva K; Willemsen, Philip G

    2008-01-01

    Our work focuses on the understanding of the origin of CNO-anomalies, which have been detected in several Galactic globular clusters (GCs). This study is based on a homogeneous data set of hundreds of medium resolution spectra of stars in eight GCs. Two of the clusters are believed to be former members of the Sagittarius dSph galaxy. Our sample comprises stars in different evolutionary states, namely the main sequence turn-off (MSTO) region, the subgiant branch (SGB), and the base of the red giant branch (RGB). We compare the relative CN and CH line strengths of stars in the same evolutionary states. The majority of the examined clusters show significant variations in their CN and CH abundances at the base of the RGB. The two former Sgr dSph clusters do not exhibit any CN-strong stars. Our results suggest that the environment in which the clusters influences existence of CN-strong stars. We confirm the known anticorrelation between CN and CH for most of the observed GCs. Although the signal of CN absorption i...

  8. New approach to neurorehabilitation: cranial nerve noninvasive neuromodulation (CN-NINM) technology

    Science.gov (United States)

    Danilov, Yuri P.; Tyler, Mitchel E.; Kaczmarek, Kurt A.; Skinner, Kimberley L.

    2014-06-01

    Cranial Nerve NonInvasive NeuroModulation (CN-NINM) is a primary and complementary multi-targeted rehabilitation therapy that appears to initiate the recovery of multiple damaged or suppressed brain functions affected by neurological disorders. It is deployable as a simple, home-based device (portable neuromodulation stimulator, or PoNSTM) and training regimen following initial patient training in an outpatient clinic. It may be easily combined with many existing rehabilitation therapies, and may reduce or eliminate the need for more aggressive invasive procedures or possibly decrease total medication intake. CN-NINM uses sequenced patterns of electrical stimulation on the tongue. Our hypothesis is that CN-NINM induces neuroplasticity by noninvasive stimulation of two major cranial nerves: trigeminal (CN-V), and facial (CN-VII). This stimulation excites a natural flow of neural impulses to the brainstem (pons varolli and medulla), and cerebellum, to effect changes in the function of these targeted brain structures, extending to corresponding nuclei of the brainstem. CN-NINM represents a synthesis of a new noninvasive brain stimulation technique with applications in physical medicine, cognitive, and affective neurosciences. Our new stimulation method appears promising for treatment of a full spectrum of movement disorders, and for both attention and memory dysfunction associated with traumatic brain injury.

  9. A CN Band Survey of Red Giants in the Globular Cluster M53

    Science.gov (United States)

    Martell, S. L.; Smith, G. H.

    2004-12-01

    We investigate the star-to-star variations in λ 3883 CN bandstrength among red giant stars in the low-metallicity globular cluster M53 ([Fe/H] = --2.0). Our data were taken with the Kast spectrograph on the 3-meter Shane telescope at Lick Observatory in April 2001. Star-to-star variations in CN bandstrength are common in intermediate- and high-metallicity globular clusters ([Fe/H] ≥ --1.6). Our data were obtained to test whether that variation will also be present in a low-metallicity globular cluster, or whether it will be suppressed by the overall lack of metals in the stars. Our preliminary result is that the λ 3883 CN band is weak in our program stars, which span the brightest magnitude of the red giant branch. On visual inspection, the M53 giants appear to be similar in their CN bandstrength to the four CN-weak giants in NGC 6752 whose average spectrum is plotted in Fig. 4 of Norris et al. (1981, ApJ, 244, 205). This work is planned to form part of a larger study of the metallicity dependence of CN bandstrength and carbon abundance behavior on the upper giant branch of globular clusters. This work is supported by NSF grant AST 00-98453 and by an award from the ARCS foundation, Northern California Chapter.

  10. Influence of N atomic percentages on cell attachment for CN$_x$ coatings

    Indian Academy of Sciences (India)

    D J Li; L F Niu

    2003-06-01

    Carbon film is an excellent candidate for use as a biocompatible coating due to its excellent properties. However, considerable attention has just been focused on the biocompatibility of diamond-like carbon (DLC) in recent years. It is difficult to find reports on the investigations of the biocompatibility of CN$_x$ so far. It is well known that CN$_x$ has similar structural characteristics as that of DLC. Its excellent mechanical and tribological properties are comparable to that of DLC. In addition, it is probable that the presence of nitrogen leads to a positive effect on biocompatibility. So, this work focusses on cell attachment of CN$_x$ coating and the relation between nitrogen atomic percentage and cell attachment. CN$_x$ coatings were prepared using magnetron sputtering under two N2 partial pressures for the evaluation of relation between nitrogen atomic percentage and cell attachment. Cell culture tests using human endothelial cells and mouse fibroblasts were performed. Both coatings resulted in no adverse effects on the cells in culture. Compared with CN$_x$ ( = 0.088), CN$_x$ ( = 0.149) film provided a better surface for normal cellular attachment, spreading and proliferation without apparent impairment of cell physiology. At the same time, the coatings exhibited excellent tribological and corrosion performance. XPS and AES analyses showed that higher nitrogen atomic percentage might lead to a positive effect on the cell attachment.

  11. [Screening and function analysis of a cyclohexanone-degrading bacterium CN1 from deep sea sediment].

    Science.gov (United States)

    Li, Hu; Shao, Zong-Ze

    2007-10-01

    Micrococcu luteus CN1 was found to be able to utilize cyclohexanone well from the strains originally isolated from Pacific Ocean sediment. The optimum conditions for its growth were determined as 25 degrees C -37 degrees C, pH 8, salinity 6%. It could survive in the medium with high concentration of cyclohexanone ( > 44% V/V), and grew most vigorously in medium with 16.7% (V/V) cyclohexanone. CN1 could transform cyclohexanol to cyclohexanone which could be further degraded and mineralized quickly. This indicated the presence of cyclohexanol dehydrogenase and probable presence of cyclohexanone monooxygenase. With degenerate PCR for cloning part of cyclohexanone monooxygenase gene, the DNA fragment of 450bp was gotten. Amino acid sequence analysis showed that it owned the conserved sequence of the Baeyer-Villiger monooxygenase family and had the highest homology of 80% with cyclohexanone monooxygenase from Arthrobacter sp. BP2, only 53% with that from Acinetobacter sp. NCIMB 9871 which had been the most deeply investigated. So far as we know, both cyclohexanol and cyclohexanone degradation resorted to cyclohexanone monooxygenase. So this gene should be responsible for cyclohexanone degradation in CN1. All the cyclohexanone-degraders previously reported could degrade cyclopentanone, but, CN1 did not degrade cyclopentanone. This indicated that cyclohexanone monooxygenase in CN1 was special. Additionally, it was found for the first time that cyclohexanol could inhibit cyclohexanone degradation to certain degree in CN1.

  12. Design of Fault Analysis and Diagnosis System in NC Machine Tool%数控机床故障分析与诊断系统的设计

    Institute of Scientific and Technical Information of China (English)

    欧敏

    2013-01-01

    In this typical faults of CNC machine tools, through careful analysis and research, find out the fault and the relationship between certain signal characteristics, and on the basis of the design of fault diagnosis system, presents a diagnostic system of soft, hardware design, failure to effectively forecast and diagnosis. In practice the effective for NC machine tool maintenance, ensure the normal operation of CN machine tools.%针对数控机床的典型故障,进行认真分析和研究,找出典型故障与某些信号特征间的关系,并在此基础上设计出故障诊断系统,提出了诊断系统的软、硬件设计方案,对故障进行有效的预测与诊断。在实际操作中对数控机床进行有效维护,保证了数控机床的正常运行。

  13. Nuclear Quadrupole Hyperfine Structure in HC14N/H14NC and DC15N/D15NC Isomerization: A Diagnostic Tool for Characterizing Vibrational Localization

    CERN Document Server

    Wong, Bryan M

    2010-01-01

    Large-amplitude molecular motions which occur during isomerization can cause significant changes in electronic structure. These variations in electronic properties can be used to identify vibrationally-excited eigenstates which are localized along the potential energy surface. This work demonstrates that nuclear quadrupole hyperfine interactions can be used as a diagnostic marker of progress along the isomerization path in both the HC14N/H14NC and DC15N/D15NC chemical systems. Ab initio calculations at the CCSD(T)/cc-pCVQZ level indicate that the hyperfine interaction is extremely sensitive to the chemical bonding of the quadrupolar 14N nucleus and can therefore be used to determine in which potential well the vibrational wavefunction is localized. A natural bonding orbital analysis along the isomerization path further demonstrates that hyperfine interactions arise from the asphericity of the electron density at the quadrupolar nucleus. Using the CCSD(T) potential surface, the quadrupole coupling constants of...

  14. Max-Flow Problem in Undirected Planar Networks with Node Capacities Being in NC

    Institute of Scientific and Technical Information of China (English)

    Xian-Chao Zhang; Ying-Yu Wan; Guo-Liang Chen

    2004-01-01

    The max-flow problem in planar networks with only edge capacities has been proved to be in NC (Nickle's Class). This paper considers a more general version of the problem when the nodes as well as the edges have capacities. In a general network, the node-edge-capacity problem can be easily reduced to the edge-capacity problem. But in the case of planar network this reduction may destroy the planarity, and reduces the problem to the edge-capacity problem in a general network, which is P-complete. A recent contribution presents a new reduction for planar networks, that maintains the planarity. In this paper, it is proved that this reduction is in NC and thus the node-edge-capacity problem in undirected planar networks is in NC.

  15. NC INCREMENTAL SHEET METAL FORMING PROCESS AND VERTICAL WALL SQUARE BOX FORMING

    Institute of Scientific and Technical Information of China (English)

    Zhou Liuru; Mo Jianhua; Xiao Xiangzhi

    2004-01-01

    The forming principle and deformation analysis of NC incremental sheet metal forming process as well as the process planning, experiment and key process parameters of vertical wall square box forming are presented. Because the deformation of sheet metal only occurs around the tool head and the deformed region is subjected to stretch deformation, the deformed region of sheet metal thins, and surface area increases. Sheet metal forming stepwise is to lead to the whole sheet metal deformation. The forming half-apex angle θ and corner radius R are the main process parameters in NC incremental forming of vertical wall square box. According to sine law, a vertical wall square box can't be formed by NC incremental sheet metal forming process in a single process, rather, it must be formed in multi processes. Thus, the parallel line type tool path process method is presented to form the vertical wall square box, and the experiment and analysis are made to verify it.

  16. Compositional, structural and mechanical characteristics of nc-TiC/a-C:H nanocomposite films

    International Nuclear Information System (INIS)

    Nanocomposite nc-TiC/a-C:H films, with an unusual combination of superhardness, high elastic modulus and high elastic recovery, are prepared by filtered cathodic vacuum arc technique using the C2H2 gas as the precursor. The effects of filter coil current on compositional, structural and mechanical properties of the nc-TiC/a-C:H films have been investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy disperse spectroscopy (EDS), microindentation and tribotester measurements. XPS and Raman analyses show that composition and nanostructure of the nc-TiC/a-C:H films can be changed by varying the filter coil current. By selecting the proper value of filter coil current, 2.5 A, one can remarkably enhance the mechanical properties of films such as superhardness (43.6 GPa). The superhardness can be ascribed to the phase variation and the nanostructure.

  17. Non-convex prior image constrained compressed sensing (NC-PICCS)

    Science.gov (United States)

    Ramírez Giraldo, Juan Carlos; Trzasko, Joshua D.; Leng, Shuai; McCollough, Cynthia H.; Manduca, Armando

    2010-04-01

    The purpose of this paper is to present a new image reconstruction algorithm for dynamic data, termed non-convex prior image constrained compressed sensing (NC-PICCS). It generalizes the prior image constrained compressed sensing (PICCS) algorithm with the use of non-convex priors. Here, we concentrate on perfusion studies using computed tomography examples in simulated phantoms (with and without added noise) and in vivo data, to show how the NC-PICCS method holds potential for dramatic reductions in radiation dose for time-resolved CT imaging. We show that NC-PICCS can provide additional undersampling compared to conventional convex compressed sensing and PICCS, as well as, faster convergence under a quasi-Newton numerical solver.

  18. Tricolor microcavity OLEDs based on P-nc-Si:H films as the complex anodes

    Institute of Scientific and Technical Information of China (English)

    Li Yang; Liu Xingyuan; Wu Chunya; Meng Zhiguo; Wang Yi; Xiong Shaozhen

    2009-01-01

    A P+-nc-Si:H film (boron-doped nc-Si:H thin film) was used as a complex anode of an OLED. As an ideal candidate for the composite anode, the P+-nc-Si:H thin film has a good conductivity with a high work function (~5.7 eV) and outstanding optical properties of high reflectivity, transmission, and a very low absorption. As a result, the combination of the relatively high reflectivity of a P+-nc-Si:H film/ITO complex anode with the very high reflectivity of an Al cathode could form a micro-cavity structure with a certain Q to improve the efficiency of the OLED fabricated on it. An RGB pixel generated by microcavity OLEDs is beneficial for both the reduction of the light loss and the improvement of the color purity and the efficiency. The small molecule Alq would be useful for the emitting light layer (EML) of the MOLED, and the P+-nc-Si film would be used as a complex anode of the MOLED, whose configuration can be constructed as Glass/LTO/P+-nc-Si:H/ITO/MoO3/NPB/Alq/LiF/Al. By adjusting the thickness of the organic layer NPB/Alq, the optical length of the microcavity and the REB colors of the device can be obtained. The peak wavelengths of an OLED are located at 486, 550, and 608 nm, respectively.The CIE coordinates are (0.21,0.45), (0.33,0.63), and (0.54,0.54), and the full widths at half maximum (FWHM)are 35, 32, and 39 nm for red, green, and blue, respectively.

  19. Role of the NC-loop in catalytic activity and stability in lipase from Fervidobacterium changbaicum.

    Directory of Open Access Journals (Sweden)

    Binchun Li

    Full Text Available Flexible NC-loops between the catalytic domain and the cap domain of the α/β hydrolase fold enzymes show remarkable diversity in length, sequence, and configuration. Recent investigations have suggested that the NC-loop might be involved in catalysis and substrate recognition in many enzymes from the α/β hydrolase fold superfamily. To foster a deep understanding of its role in catalysis, stability, and divergent evolution, we here systemically investigated the function of the NC-loop (residues 131-151 in a lipase (FClip1 from thermophilic bacterium Fervidobacterium changbaicum by loop deletion, alanine-scanning mutagenesis and site-directed mutagenesis. We found that the upper part of the NC-loop (residues 131-138 was of great importance to enzyme catalysis. Single substitutions in this region could fine-tune the activity of FClip1 as much as 41-fold, and any deletions from this region rendered the enzyme completely inactive. The lower part of the NC-loop (residues 139-151 was capable of enduring extensive deletions without loss of activity. The shortened mutants in this region were found to show both improved activity and increased stability simultaneously. We therefore speculated that the NC-loop, especially the lower part, would be a perfect target for enzyme engineering to optimize the enzymatic properties, and might present a hot zone for the divergent evolution of α/β hydrolases. Our findings may provide an opportunity for better understanding of the mechanism of divergent evolution in the α/β hydrolase fold superfamily, and may also guide the design of novel biocatalysts for industrial applications.

  20. 大腸菌L-form NC7の濁土変化と増殖に及ぼす浸透的安定剤の効果

    OpenAIRE

    小野田, 哲夫; 大島, 朗伸

    1988-01-01

    The effects of osmotic stabilizers on swelling and growth of L-form NC7 derived from Escherichia coli K 12 were examined. The presence of impermeable solute , such as NaCl or KCl, in the suspended medium were effective as osmotic stabilizer, while permeable solute, such as glycerol were ineffective . On the other hand, when sucrose was used as osmotic stabilizer, in cells upshocked with 0.2 M sucrose, rapid decrease in optical density and then slow restoration were observed. In the upshocked ...

  1. OpenCL programming guide

    CERN Document Server

    Munshi, Aaftab; Mattson, Timothy G; Fung, James; Ginsburg, Dan

    2011-01-01

    Using the new OpenCL (Open Computing Language) standard, you can write applications that access all available programming resources: CPUs, GPUs, and other processors such as DSPs and the Cell/B.E. processor. Already implemented by Apple, AMD, Intel, IBM, NVIDIA, and other leaders, OpenCL has outstanding potential for PCs, servers, handheld/embedded devices, high performance computing, and even cloud systems. This is the first comprehensive, authoritative, and practical guide to OpenCL 1.1 specifically for working developers and software architects. Written by five leading OpenCL authorities, OpenCL Programming Guide covers the entire specification. It reviews key use cases, shows how OpenCL can express a wide range of parallel algorithms, and offers complete reference material on both the API and OpenCL C programming language. Through complete case studies and downloadable code examples, the authors show how to write complex parallel programs that decompose workloads across many different devices. They...

  2. Sublimation of the Endohedral Fullerene Er3N@C80

    OpenAIRE

    Stibor, Alexander; Schefzyk, Hannah; Fortágh, József

    2009-01-01

    The heat of sublimation of the endohedral metallofullerene Er3N@C80 was measured via Knudsen effusion mass spectrometry. The large molecule consists of a C80 fullerene cage which is stabilized by comprising a complex of three erbium atoms bounded to a nitrogen atom and has a mass of 1475 amu. The mass spectrum at a temperature of 1045 K and the relative intensities of the thermal fractions of Er3N@C80 are provided. We also discuss possible thermal decomposition processes for these particles. ...

  3. A Search for Neutrino Induced Coherent NC($\\pi^{0}$) Production in the MINOS Near Detector

    Energy Technology Data Exchange (ETDEWEB)

    Cherdack, Daniel David [Tufts Univ., Medford, MA (United States)

    2011-02-01

    The production of single, highly forward π0 mesons by NC coherent neutrino-nucleus interactions (νμ + N → νμ + N + π0) is a process which probes fundamental aspects of the weak interaction. This reaction may also pose as a limiting background for long baseline searches for νμ → νe oscillations if the neutrino mixing angle θ13 is very small. The high-statistics sample of neutrino interactions recorded by the MINOS Near Detector provides an opportunity to measure the cross section of this coherent reaction on a relatively large-A nucleus at an average Ev = 4.9 GeV. A major challenge for this measurement is the isolation of forward-going electromagnetic (EM) showers produced by the relatively rare coherent NC0) process amidst an abundant rate of incoherently produced EM showers. The backgrounds arise from single π0 dominated NC events and also from quasi-elastic-like CC scattering of electron neutrinos. In this Thesis the theory of coherent interactions is summarized, and previous measurements of the coherent NC0) cross section are reviewed. Then, methods for selecting a sample of coherent NC0) like events, extracting the coherent NC0) event rate from that sample, estimating the analysis uncertainties, and calculating a cross section, are presented. A signal for neutrino-induced NC0) production is observed in the relevant kinematic regime as an excess of events of three standard deviations above background. The reaction cross sections, averaged over an energy window of 2.5 ≤ Ev ≤ 9.0 GeV is determined to be (31.6±10.5) x 10-40 cm2/nucleus. The result is the first evidence obtained for neutrino-nucleus coherent NC0) scattering on iron, and is the first measurement on an average nuclear target above A = 30. The cross section measurement

  4. CyNC - a method for Real Time Analysis of Systems with Cyclic Data Flows

    DEFF Research Database (Denmark)

    Schiøler, Henrik; Nielsen, Jens F. Dalsgaard; Larsen, Kim Guldstrand;

    2005-01-01

    The paper addresses a novel method for realtime analysis of systems with cyclic data flows. The presented method is based on Network Calculus principles, where upper and lower flow and service constraint are used to bound data flows and processing resources. In acyclic systems flow constraints may...... equation in a space of constraint functions. In this paper a method denoted CyNC for obtaining a well defined solution to that problem is presented along with a theoretical justification of the method as well as comparative results for CyNC and alternative methods on a relevant example. The method is...

  5. Thermal Phase Transition in Weakly Interacting Large $N_c$ QCD

    CERN Document Server

    Hallin, J; Hallin, Joakim; Persson, David

    1998-01-01

    We consider thermal QCD in the large N_C limit, mainly in 1+1 dimensions. The gauge coupling is only taken into account to minimal order, by projection onto colour singlets. An expression for the free energy, exact as N_C goes to infinity, is then obtained. A third order phase transition will occur. The critical temperature depends on the ratio N_C/L, where L is the (infinite) spatial length. In the high temperature limit, the free energy will approach the same value as in the free theory, whereas we have a mesonic like phase at low temperature. Expressions for the quark condensate, , are also obtained.

  6. Covariant meson-baryon scattering with chiral and large Nc constraints

    International Nuclear Information System (INIS)

    We give a review of recent progress on the application of the relativistic chiral SU(3) Lagrangian to meson-baryon scattering. It is shown that a combined chiral and 1/Nc expansion of the Bethe-Salpeter interaction kernel leads to a good description of the kaon-nucleon, antikaon-nucleon and pion-nucleon scattering data typically up to laboratory momenta of plab ≅ 500 MeV. We solve the covariant coupled channel Bethe-Salpeter equation with the interaction kernel truncated to chiral order Q3 where we include only those terms which are leading in the large Nc limit of QCD. (orig.)

  7. The NC Power Supply Design of Large Current and Wide Frequency Pulse in SEAM

    OpenAIRE

    Jianping Zhou; Yan Xu; Qiang He; Bisheng Zhou

    2013-01-01

    There are a lot of ways to achieve large current pulse power supply, and the more common way is to adopt the inverter switching circuit to achieve pulse power supply. The core of the NC power supply design of large current and wide frequency pulse in SEAM is using two-stage modulation. Combined with inverter technology, DC chopper technology and NC technology, it not only can achieve the adjustability of the output pulse amplitude, but also can realize continuous adjustment of the output puls...

  8. Reactions of the CN Radical with Benzene and Toluene: Product Detection and Low-Temperature Kinetics

    Energy Technology Data Exchange (ETDEWEB)

    Trevitt, Adam J.; Goulay, Fabien; Taatjes, Craig A.; Osborn, David L.; Leone, Stephen R.

    2009-12-23

    Low temperature rate coefficients are measured for the CN + benzene and CN + toluene reactions using the pulsed Laval nozzle expansion technique coupled with laser-induced fluorescence detection. The CN + benzene reaction rate coefficient at 105, 165 and 295 K is found to be relatively constant over this temperature range, 3.9 - 4.9 x 10-10 cm3 molecule-1 s-1. These rapid kinetics, along with the observed negligible temperature dependence, are consistent with a barrierless reaction entrance channel and reaction efficiencies approaching unity. The CN + toluene reaction is measured to have a slower rate coefficient of 1.3 x 10-10 cm3 molecule-1 s-1 at 105 K. At room temperature, non-exponential decay profiles are observed for this reaction that may suggest significant back-dissociation of intermediate complexes. In separate experiments, the products of these reactions are probed at room temperature using synchrotron VUV photoionization mass spectrometry. For CN + benzene, cyanobenzene (C6H5CN) is the only product recorded with no detectable evidence for a C6H5 + HCN product channel. In the case of CN + toluene, cyanotoluene (NCC6H4CH3) constitutes the only detected product. It is not possible to differentiate among the ortho, meta and para isomers of cyanotoluene because of their similar ionization energies and the ~;; 40 meV photon energy resolution of the experiment. There is no significant detection of benzyl radicals (C6H5CH2) that would suggest a H-abstraction or a HCN elimination channel is prominent at these conditions. As both reactions are measured to be rapid at 105 K, appearing to have barrierless entrance channels, it follows that they will proceed efficiently at the temperatures of Saturn?s moon Titan (~;;100 K) and are also likely to proceed at the temperature of interstellar clouds (10-20 K).

  9. 76 FR 59067 - Airworthiness Directives; Bombardier, Inc. Model CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604...

    Science.gov (United States)

    2011-09-23

    ... ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3.... Model CL-600-2B16 (CL- 601-3A, CL-601-3R, and CL-604 Variants) Airplanes AGENCY: Federal Aviation...) events have occurred where the Air-Driven Generator (ADG) failed to provide power on CL-600-2B19...

  10. Microarray analysis of ncRNA expression patterns in Caenorhabditis elegans after RNAi against snoRNA associated proteins

    Directory of Open Access Journals (Sweden)

    Skogerbø Geir

    2008-06-01

    Full Text Available Abstract Background Short non-coding RNAs (ncRNAs perform their cellular functions in ribonucleoprotein (RNP complexes, which are also essential for maintaining the stability of the ncRNAs. Depletion of individual protein components of non-coding ribonucleoprotein (ncRNP particles by RNA interference (RNAi may therefore affect expression levels of the corresponding ncRNA, and depletion of candidate associated proteins may constitute an alternative strategy when investigating ncRNA-protein interactions and ncRNA functions. Therefore, we carried out a pilot study in which the effects of RNAi against protein components of small nucleolar RNPs (snoRNPs in Caenorhabditis elegans were observed on an ncRNA microarray. Results RNAi against individual C. elegans protein components of snoRNPs produced strongly reduced mRNA levels and distinct phenotypes for all targeted proteins. For each type of snoRNP, individual depletion of at least three of the four protein components produced significant (P ≦ 1.2 × 10-5 reductions in the expression levels of the corresponding small nucleolar RNAs (snoRNAs, whereas the expression levels of other ncRNAs were largely unaffected. The effects of depletion of individual proteins were in accordance with snoRNP structure analyses obtained in other species for all but two of the eight targeted proteins. Variations in snoRNA size, sequence and secondary structure characteristics were not systematically reflected in the affinity for individual protein component of snoRNPs. The data supported the classification of nearly all annotated snoRNAs and suggested the presence of several novel snoRNAs among unclassified short ncRNA transcripts. A number of transcripts containing canonical Sm binding element sequences (Sm Y RNAs also showed reduced expression after depletion of protein components of C/D box snoRNPs, whereas the expression of some stem-bulge RNAs (sbRNAs was increased after depletion of the same proteins. Conclusion

  11. 微腔中nc-Si/SiN超晶格的光致发光%Photoluminescence of nc-Si/SiN Superlattices Embedded in Optical Microcavities

    Institute of Scientific and Technical Information of China (English)

    陈三; 黄信凡; 钱波; 陈坤基; 岑展鸿; 刘艳松; 韩培高; 马忠元; 徐骏; 李伟

    2006-01-01

    We fabricate a-Si/a-SiNz superlattices and a one-dimensional amorphous silicon nitride photonic crystal microcavity by plasma enhancement chemical vapor deposition (PECVD). To improve the light-emitting efficiency of the nc-Si/a-SiNz superlattices, which are made from a-Si/a-SiNz superlattices by laser annealing, an nc-Si quantum dot array is inserted into the photonic crystal microcavity. Raman spectroscopy and transmission electron microscopy analysis show that nc-Si with a size of 4nm,which is close to the designed thickness of the a-Si sublayers,is formed in the a-Si sublayers. Owing to microcavity effects,the PL peak of the nc-Si/a-SiNz superlattices embedded in the microcavity is strongly narrowed, and the intensity of the PL is enhanced by two orders of magnitude with respect to the emission of λ/2-thick nc-Si/a-SiNz superlattices. Light emission at a cavity-resonant frequency from the nc-Si/a-SiNz superlattices is enhanced while other frequencies are forbidden. This leads to the narrowing of the PL spectrum and enhancement of the intensity.%研究了一维光子晶体微腔结构对nc-Si/a-SiNz超晶格发射的调制.一维光子晶体微腔采用两种具有不同折射率的非化学组分非晶氮化硅的周期调制结构,腔中嵌入采用激光晶化方法制备的硅量子点阵列,从Raman谱和透射电子显微镜分析得到其尺寸约为3~4 nm.从光致发光谱上观察到明显的选模作用、明显变窄的发光峰以及约两个量级的发光强度的增强.微腔对硅量子点阵列发光的调制主要表现在两个方面:共振模式的增强和非共振模式的抑制.硅量子点中位于腔共振模式的辐射跃迁被增强,非共振模式的辐射跃迁被抑制,因此位于腔共振频率处的跃迁通道成为硅量子点中唯一的辐射跃迁通道,导致光致发光谱的窄化和强度的增强.因此,在提高硅材料发光效率方面,光子晶体微腔具有非常大的应用前景.

  12. Circumstellar C2, CN, and CH+ in the optical spectra of post-AGB stars

    CERN Document Server

    Bakker, E J; Waters, L B F M; Schoenmaker, T; Bakker, Eric J.; Dishoeck, Ewine F. van; Schoenmaker, Ton

    1996-01-01

    We present optical high-resolution spectra of a sample of sixteen post-AGB stars and IRC +10216. Of the post-AGB stars, ten show C2 Phillips and Swan and CN Red System absorption, one CH+ emission, one CH+ absorption, and four without any molecules. We find typically Trot=43-399, 155-202, and 18-50 K, log N = 14.90-15.57, 14.35, and 15.03-16.47 cm-2 for C2, CH+, and CN respectively, and 0.620. The presence of C2 and CN absorption is correlated with cold dust (Tdust300K). All objects with the unidentified 21mum emission feature exhibit C2 and CN absorption, but not all objects with C2 and CN detections exhibit a 21mum feature. The derived expansion velocity, ranging from 5 to 44 km/s, is the same as that derived from CO millimeter line emission. This unambiguously proves that these lines are of circumstellar origin and are formed in the AGB ejecta (circumstellar shell expelled during the preceding AGB phase). Furthermore there seems to be a relation between the C2 molecular column density and the expansion vel...

  13. A CH3CN and HCO+ survey towards southern methanol masers associated with star formation

    CERN Document Server

    Purcell, C R; Burton, M G; Walsh, A J; Minier, V; Hunt-Cunningham, M R; Kedziora-Chudczer, L L; Longmore, S N; Hill, T; Bains, I; Barnes, P J; Busfield, A L; Calisse, P; Crighton, N H M; Curran, S J; Davis, T M; Dempsey, J T; Derragopian, G; Fulton, B R; Hidas, M G; Hoare, M G; Lee, J K; Ladd, E F; Lumsden, S L; Moore, T J T; Murphy, M T; Oudmaijer, R D; Pracy, M B; Rathborne, J; Robertson, S; Schultz, A S B; Shobbrook, J; Sparks, P A; Storey, J; Travouillion, T

    2005-01-01

    We present the initial results of a 3-mm spectral line survey towards 83 methanol maser selected massive star-forming regions. Here we report observations of the J=5-4 and 6-5 rotational transitions of methyl cyanide (CH3CN) and the J=1-0 transition of HCO+and H13CO+. CH3CN emission is detected in 58 sources (70 %) of our sample). We estimate the temperature and column density for 37 of these using the rotational diagram method. The temperatures we derive range from 28-166 K, and are lower than previously reported temperatures, derived from higher J transitions. We find that CH3CN is brighter and more commonly detected towards ultra-compact HII (UCHII) regions than towards isolated maser sources. Detection of CH3CN towards isolated maser sources strongly suggests that these objects are internally heated and that CH3CN is excited prior to the UCHII phase of massive star-formation. HCO+ is detected towards 82 sources (99 % of our sample), many of which exhibit asymmetric line profiles compared to H13CO+. Skewed...

  14. SO(n)-Invariant Special Lagrangian Submanifolds of Cn+1 with Fixed Loci

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Let SO(n) act in the standard way on Cn and extend this action in the usual way toCn+1=C((+))Cn.It is shown that a nonsingular special Lagrangian submanifold L (∩) Cn+1 that is invariant under this SO(n)-action intersects the fixed C (∩) Cn+1 in a nonsingular real-analytic arc A (which may be empty). If n > 2, then A has no compact component.Conversely, an embedded, noncompact nonsingular real-analytic arc A (∩) C lies in an embedded nonsingular special Lagrangian submanifold that is SO(n)-invariant. The same existence result holds for compact A if n = 2. If A is connected, there exist n distinct nonsingular SO(n)-invariant special Lagrangian extensions of A such that any embedded nonsingular SO(n)-invariant special Lagrangian extension of A agrees with one of these n extensions in some open neighborhood of A.The method employed is an analysis of a singular nonlinear PDE and ultimately calls on the work of Gérard and Tahara to prove the existence of the extension.

  15. Probing the gaseous disk of T Tau N with CN 5-4 lines

    CERN Document Server

    Podio, L; Codella, C; Nisini, B; Aresu, G; Brittain, S; Cabrit, S; Dougados, C; Grady, C; Meijerink, R; Sandell, G; Spaans, M; Thi, W -F; White, G J; Woitke, P

    2014-01-01

    We present spectrally resolved Herschel/HIFI observations of the young multiple system T Tau in atomic and molecular lines. While CO, H2O, [C II], and SO lines trace the envelope and the outflowing gas up to velocities of 33 km/s with respect to systemic, the CN 5-4 hyperfine structure lines at 566.7, 566.9 GHz show a narrow double-peaked profile centered at systemic velocity, consistent with an origin in the outer region of the compact disk of T Tau N. Disk modeling of the T Tau N disk with the thermo-chemical code ProDiMo produces CN line fluxes and profiles consistent with the observed ones and constrain the size of the gaseous disk (R_out = 110 (+10, -20) AU) and its inclination (i = 25 \\pm 5 degree). The model indicates that the CN lines originate in a disk upper layer at 40-110 AU from the star, which is irradiated by the stellar UV field and heated up to temperatures of 50-700 K. With respect to previously observed CN 2-1 millimeter lines, the CN 5-4 lines appear to be less affected by envelope emissio...

  16. Comparing CN Features in Two Comets: 1P/Halley and 103P/Hartley 2

    Science.gov (United States)

    Samarasinha, Nalin H.; Lejoly, Cassandra; Barrera, Jose; Mueller, Beatrice; Schleicher, David

    2015-11-01

    Comets 1P/Halley and 103P/Hartley 2 show distinct CN features in their respecive comae. Both comets are non-principal-axis rotators. 1P/Halley is the proto-type for Halley-type comets with the Oort Cloud as its possible source region, whereas 103P/Hartley 2 is a Jupiter-Family comet that possibly originated from the Kuiper Belt. Both comets were spacecraft targets and studied widely from both space and from the ground.We will discuss the properties of CN features, and in particular the behavior of the derived outflow velocities based on the CN features present in the groundbased coma images of these two comets. The corresponding heliocentric distances for CN images of comet 1P/Halley range from approximately 0.8 AU to 2.0 AU (during its post-perihelion leg of the 1986 apparition). For CN images of comet 103P/Hartley 2, the corresponding heliocentric distances range from 1.31 AU through the perihelion (at 1.06 AU) to 1.25 AU (during its 2010 apparition).Ultimately, these results will be used to understand the rotational states and the activity behaviors of these two comets.

  17. Experimental investigation of wear characteristics on TiCN-coated AISI 410 steel

    Science.gov (United States)

    Prabakaran, Vijayasarathi; Sivakumaran, Ilaiyavel; Palimar, Suresh Prabhu

    2016-04-01

    In this work, the dry sliding wear test of uncoated and multilayer TiCN-coated AISI 410 steel against high carbon steel disc recognized at 2.30267 ms-1 sliding speeds and under a three series load of 5, 10 and 20 N at room temperature. On account of the more coherent interface between TiCN and C probably found, there are high hardness and superior wear resistance. Compared to AISI 410 uncoated steel, the presence of C in the multilayer TiCN coatings leads to reduced coefficient of friction and wear loss. The multilayer TiCN coating is characterized by X-ray diffraction analysis, scanning electron microscopy, micro-hardness and pin-on-disc tribometer tests. The more grooving region, pits and ploughing ridge were examined on the worn surface of the AISI 410 uncoated steel. The result shows hard multilayer TiCN-coated particles viewing on the worn surface of the high carbon steel disc.

  18. Thermodynamic stability of in situ W–ZrC and W–Zr(CN) composites

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Jae-Hee [Korea Aerospace Research Institute, Daejeon 305-806 (Korea, Republic of); Zhe, Gao [Saint-Gobain Research Shanghai Co., Ltd, Wenjing-road, Minhang-district, Shanghai 200245 (China); Lim, Jaehyuk [Samsung Electronics, Yongin 446-811 (Korea, Republic of); Park, Choongkwon [Department of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of); Kang, Shinhoo, E-mail: shinkang@snu.ac.kr [Department of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of)

    2015-10-25

    Powders of W–ZrC and W–Zr(CN) were carbothermally synthesized in situ from milled mixtures of graphite, WO{sub 3} and ZrO{sub 2}. The thermal stability of Zr(CN) in a W matrix was simulated and compared with that of ZrC in W in terms of free energy change and carbide coarsening. Carbon and nitrogen had high mutual affinity in Zr(CN) of B1 crystal structure, which led their activity curves to exhibit strong negative deviation from ideal mixing behavior. Zr(CN) was more stable than ZrC up to 2075 K; however, a microstructural study showed that it became less stable than ZrC at around 1975 K. This result is attributed to the decreasing thermodynamic stability of ZrN with increasing temperature. Other transition metal carbonitrides containing group 4–6 elements are expected to show similar coarsening behaviors at high temperatures. - Highlights: • The Zr(CN) phase formed due to the high affinity between C and N in ZrC. • A complete reversal of the slope is found in the formation energy curves. • The growth of the carbonitride is due to the nitrogen, reducing the stability. • Solid solutions containing group 4 elements would show similar growth behavior.

  19. 75 FR 65278 - Pamlico Sound and Adjacent Waters, NC; Danger Zones for Marine Corps Operations

    Science.gov (United States)

    2010-10-22

    ... of Engineers, Department of the Army 33 CFR Part 334 Pamlico Sound and Adjacent Waters, NC; Danger... its regulations to establish one new danger zone in Pamlico Sound near Marine Corps Air Station Cherry Point, North Carolina. Establishment of this danger zone will enable the Marine Corps to control...

  20. 76 FR 30023 - Pamlico Sound and Adjacent Waters, NC; Danger Zones for Marine Corps Operations

    Science.gov (United States)

    2011-05-24

    ..., 2010, issue of the Federal Register (75 FR 65278) with the docket number COE-2010-0037 and one comment... of Engineers, Department of the Army 33 CFR Part 334 Pamlico Sound and Adjacent Waters, NC; Danger.... SUMMARY: The U.S. Army Corps of Engineers is amending its regulations to establish a new danger zone....

  1. Anaerobic Oxidation of Methane Coupled to Nitrite Reduction by Halophilic Marine NC10 Bacteria.

    Science.gov (United States)

    He, Zhanfei; Geng, Sha; Cai, Chaoyang; Liu, Shuai; Liu, Yan; Pan, Yawei; Lou, Liping; Zheng, Ping; Xu, Xinhua; Hu, Baolan

    2015-08-15

    Anaerobic oxidation of methane (AOM) coupled to nitrite reduction is a novel AOM process that is mediated by denitrifying methanotrophs. To date, enrichments of these denitrifying methanotrophs have been confined to freshwater systems; however, the recent findings of 16S rRNA and pmoA gene sequences in marine sediments suggest a possible occurrence of AOM coupled to nitrite reduction in marine systems. In this research, a marine denitrifying methanotrophic culture was obtained after 20 months of enrichment. Activity testing and quantitative PCR (qPCR) analysis were then conducted and showed that the methane oxidation activity and the number of NC10 bacteria increased correlatively during the enrichment period. 16S rRNA gene sequencing indicated that only bacteria in group A of the NC10 phylum were enriched and responsible for the resulting methane oxidation activity, although a diverse community of NC10 bacteria was harbored in the inoculum. Fluorescence in situ hybridization showed that NC10 bacteria were dominant in the enrichment culture after 20 months. The effect of salinity on the marine denitrifying methanotrophic culture was investigated, and the apparent optimal salinity was 20.5‰, which suggested that halophilic bacterial AOM coupled to nitrite reduction was obtained. Moreover, the apparent substrate affinity coefficients of the halophilic denitrifying methanotrophs were determined to be 9.8 ± 2.2 μM for methane and 8.7 ± 1.5 μM for nitrite. PMID:26048927

  2. Size effect of fullerene cages and encaged clusters in M3N@C2n

    Institute of Scientific and Technical Information of China (English)

    GAN LiHua

    2009-01-01

    Based on the calculated findings that the sizes of encaged clusters determine the structures and the stability of C80-based trimetallic nitride fullerenes (TNFs), more extensive density functional theory calculations were performed on M3N@C68, M3N@C78 and M3N@C80 (M=Sc, Y and La). The calculated results demonstrated that the structures and stability undergo a transition with the increasing of the sizes of the cages and clusters. Sc3N is planar inside the three considered cages, Y3N is slightly pyramidal inside C68-6140 and C78-5 and planar inside Ih C80-7, however, La3N is pyramidal inside all the three cages. Those cages with pyramidal clusters inside deformed considerably, compared with their parent cages. In these cases, the bonding of metallic atoms toward the cages does not play an impor-tant role, and the encaged cluster tends to be located inside the cages with the largest M-M and M-C distances so that the strain energy can be released mostly. These calculations revealed the size effect of fullerene cages and encaged clusters, and can explain the position priority of M3N inside fullerene cages and the differences in yield of M3N@C2n.

  3. 75 FR 62320 - Safety Zone; Fireworks for USS GRAVELY Commissioning Ceremony, Cape Fear River, Wilmington, NC

    Science.gov (United States)

    2010-10-08

    ... SECURITY Coast Guard 33 CFR Part 165 RIN 1625-AA00 Safety Zone; Fireworks for USS GRAVELY Commissioning..., NC in support of the Fireworks for the USS GRAVELY Commissioning Ceremony. This action is necessary... area. Basis and Purpose On November 19, 2010, the USS GRAVELY Commissioning Committee will sponsor...

  4. Fabrication and Characteristics of an nc-Si/c-Si Heterojunction MOSFETs Pressure Sensor

    Directory of Open Access Journals (Sweden)

    Xiaofeng Zhao

    2012-05-01

    Full Text Available A novel nc-Si/c-Si heterojunction MOSFETs pressure sensor is proposed in this paper, with four p-MOSFETs with nc-Si/c-Si heterojunction as source and drain. The four p-MOSFETs are designed and fabricated on a square silicon membrane by CMOS process and MEMS technology where channel resistances of the four nc-Si/c-Si heterojunction MOSFETs form a Wheatstone bridge. When the additional pressure is P, the nc-Si/c-Si heterojunction MOSFETs pressure sensor can measure this additional pressure P. The experimental results show that when the supply voltage is 3 V, length-width (L:W ratio is 2:1, and the silicon membrane thickness is 75 μm, the full scale output voltage of the pressure sensor is 15.50 mV at room temperature, and pressure sensitivity is 0.097 mV/kPa. When the supply voltage and L:W ratio are the same as the above, and the silicon membrane thickness is 45 μm, the full scale output voltage is 43.05 mV, and pressure sensitivity is 2.153 mV/kPa. Therefore, the sensor has higher sensitivity and good temperature characteristics compared to the traditional piezoresistive pressure sensor.

  5. 77 FR 50444 - Safety Zone, Atlantic Intracoastal Waterway; Carolina Beach, NC

    Science.gov (United States)

    2012-08-21

    ... Beach, NC AGENCY: Coast Guard, DHS. ACTION: Notice of Proposed Rulemaking. SUMMARY: The Coast Guard... Carolina Beach, North Carolina. The safety zone is necessary to provide for the safety of mariners on..., mile 295.6, at Carolina Beach, North Carolina. The safety zone will temporarily restrict...

  6. 76 FR 14970 - National Starch and Chemical Company, Salisbury, Rowan County, NC; Notice of Settlement

    Science.gov (United States)

    2011-03-18

    ... AGENCY National Starch and Chemical Company, Salisbury, Rowan County, NC; Notice of Settlement AGENCY... National Starch and Chemical Company Site located in Mobile, Mobile County, Alabama for publication. DATES..., identified by Docket ID No. EPA-RO4- SFUND-2011-0278 or Site name National Starch and Chemical...

  7. 78 FR 15797 - Eastern Band of Cherokee Indians Disaster #NC-00049

    Science.gov (United States)

    2013-03-12

    ... ADMINISTRATION Eastern Band of Cherokee Indians Disaster NC-00049 AGENCY: U.S. Small Business Administration... Assistance Only for the Eastern Band of Cherokee Indians (FEMA-4103-DR), dated 03/01/2013. Incident: Severe... adversely affected by the disaster: Primary Areas: Eastern Band of Cherokee Indians and Associated...

  8. 77 FR 34215 - Special Local Regulations for Marine Events, Swim Event; Lake Gaston, Littleton, NC

    Science.gov (United States)

    2012-06-11

    ..., Swim Event, Lake Gaston; Littleton, NC'' in the Federal Register (77 FR 19954). We received no comments... FR Federal Register NPRM Notice of Proposed Rulemaking A. Regulatory History and Information The... SECURITY Coast Guard 33 CFR Part 100 RIN 1625-AA08 Special Local Regulations for Marine Events, Swim...

  9. 75 FR 17792 - North Carolina Disaster # NC-00025 Declaration of Economic Injury

    Science.gov (United States)

    2010-04-07

    ... ADMINISTRATION North Carolina Disaster NC-00025 Declaration of Economic Injury AGENCY: U.S. Small Business Administration. ACTION: Notice. SUMMARY: This is a notice of an Economic Injury Disaster Loan (EIDL) declaration... the Administrator's EIDL declaration, applications for economic injury disaster loans may be filed...

  10. Investigation on the foaming behaviors of NC-based gun propellants

    Institute of Scientific and Technical Information of China (English)

    Yu-xiang LI; Wei-tao YANG; San-jiu YING

    2014-01-01

    To prepare the porous NC-based (nitrocellulose-based) gun propellants, the batch foaming process of using supercritical CO2 as the physical blowing agent is used. The solubilities of CO2 in the single-base propellants and TEGDN (trimethyleneglycol dinitrate) propellants are measured by the gravimetric method, and SEM (scanning electron microscope) is used to observe the morphology of foamed propellants. The result shows that a large amount of CO2 could be dissolved in NC-based propellants. The experimental results also reveal that the energetic plasticizer TEGDN exerts an important influence on the pore structure. The triaxial tensile failure mechanism for solid-state nucleation is used to explain the nucleation of NC-based propellants in the solid state. Since some specific foaming behaviors of NC-based propellants can not be explained by the failure mechanism, a solid-state nucleation mechanism which revises the triaxial tensile failure mechanism is proposed and discussed. Copyright © 2014, China Ordnance Society. Production and hosting by Elsevier B.V. All rights reserved.

  11. Size effect of fullerene cages and encaged clusters in M3N@C2n

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    Based on the calculated findings that the sizes of encaged clusters determine the structures and the stability of C80-based trimetallic nitride fullerenes (TNFs), more extensive density functional theory calculations were performed on M3N@C68, M3N@C78 and M3N@C80 (M=Sc, Y and La). The calculated results demonstrated that the structures and stability undergo a transition with the increasing of the sizes of the cages and clusters. Sc3N is planar inside the three considered cages, Y3N is slightly pyramidal inside C68-6140 and C78-5 and planar inside I h C80-7, however, La3N is pyramidal inside all the three cages. Those cages with pyramidal clusters inside deformed considerably, compared with their parent cages. In these cases, the bonding of metallic atoms toward the cages does not play an impor-tant role, and the encaged cluster tends to be located inside the cages with the largest M-M and M-C distances so that the strain energy can be released mostly. These calculations revealed the size effect of fullerene cages and encaged clusters, and can explain the position priority of M3N inside fullerene cages and the differences in yield of M3N@C2n.

  12. 76 FR 29647 - Safety Zone; Big Rock Blue Marlin Air Show; Bogue Sound, Morehead City, NC

    Science.gov (United States)

    2011-05-23

    ... 400 yards south of the shoreline of Morehead City. (b) Definition: For the purposes of this section..., Morehead City, NC AGENCY: Coast Guard, DHS. ACTION: Temporary final rule. SUMMARY: The Coast Guard is... held over the waters of Bogue Sound, adjacent to Morehead City, North Carolina. This Safety Zone...

  13. SYNTHESIS AND THERMAL STABILITY OF NANOCOMPOSITE nc-TiN/a-TiB2 THIN FILMS

    Institute of Scientific and Technical Information of China (English)

    Y.H. Lu; Z.F. Zhou; P. Sit; Y.G. Shen; K.Y. Li; H. Chen

    2005-01-01

    Several nc-TiN/a-TiB2 thin films comprised of nanocrystalline (nc-) TiN and amorphous (a-) TiB2phases were deposited on Si(100)at room temperature by reactive unbalanced dc magnetron sputtering, followed by vacuum annealed at 400, 600, 800 and 1000℃ for 1h, respectively. Effects of B content on microstructure, mechanical behaviors and thermal microstructure stability have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and nanoindentation measurements. The results indicated that B addition greatly affected both microstructure and mechanieal behavior of nc-TiN/a-TiB2 thin films. With increasing B content the grain size decreased. A maximum hardness value of about 33GPa was obtained at B content of about 19at. %. The improved mechanical properties of nc-TiN/a-TiB2films with the addition of B into TiN were attributed to their densified microstructure with development of fine grain size. Only addition of sufficient B could restrain grain growth during annealing. High B content resulted in high microstructure stability. The crystallization of amorphous matrix occurred at about 800℃, forming TiB or TiB2 crystallite, depending on B content. Before that no change in bonding configuration was found.

  14. Joint NC-ARQ and AMC for QoS-Guaranteed Mobile Multicast

    DEFF Research Database (Denmark)

    Wang, Haibo; Schwefel, Hans-Peter; Chu, Xiaoli;

    2010-01-01

    will not necessarily be limited by the worst channel anymore, and improved spectral efficiency may be obtained in the efficiency-reliability tradeoff. In this paper, we first propose a Network-Coding-based ARQ (NC-ARQ) scheme in its optimal form and suboptimal form (denoted as Opt-ARQ and SubOpt-ARQ, resp.) to solve...

  15. Data of evolutionary structure change: 1D5NC-1UNFX [Confc[Archive

    Lifescience Database Archive (English)

    Full Text Available msd> 1.0891029834747314 EVID> 1 1UNF...1D5NC-1UNFX 1D5N 1UNF C X ----SYTLPSLPYAYDALEPHFDKQTMEIHHTKHHQTYV...NNANAALESL----PEFANLPVEELITKLDQLPADKKTVL---------RNNAGGHANHSLFWKGLKKGT--TLQGDLKAAIERDFGSVDNFKAEFEKAAASRFGSGW...HH EVID> 0 TRP CA 380 1UNF X 1UNF

  16. 77 FR 3326 - Cancellation of Environmental Impact Statement in Orange County, NC

    Science.gov (United States)

    2012-01-23

    ... [Federal Register Volume 77, Number 14 (Monday, January 23, 2012)] [Notices] [Page 3326] [FR Doc.... Clarence W. Coleman, Jr., Preconstruction and Environmental Team Leader, Raleigh, North Carolina. [FR Doc... Environmental Impact Statement in Orange County, NC AGENCY: Federal Highway Administration (FHWA),...

  17. 75 FR 81269 - Ward Transformer Superfund Site Raleigh, Wake County, NC; Notice of Settlements

    Science.gov (United States)

    2010-12-27

    ... AGENCY Ward Transformer Superfund Site Raleigh, Wake County, NC; Notice of Settlements AGENCY... Ward Transformer Superfund Site located in Raleigh, Wake County, North Carolina for publication. DATES... your comments, identified by Docket ID No. EPA-RO4- SFUND-2010-1053 or Site name Ward...

  18. 78 FR 14543 - Ward Transformer Superfund Site; Raleigh, Wake County, NC; Notice of Settlement

    Science.gov (United States)

    2013-03-06

    ... AGENCY Ward Transformer Superfund Site; Raleigh, Wake County, NC; Notice of Settlement AGENCY... Agency has entered into a settlement at the Ward Transformer Superfund Site located in Raleigh, Wake... EPA Region 4 contact Ms. Paula V. Painter. Submit your comments by Site name Ward...

  19. 33 CFR 334.420 - Pamlico Sound and adjacent waters, N.C.; danger zones for Marine Corps operations.

    Science.gov (United States)

    2010-07-01

    ..., N.C.; danger zones for Marine Corps operations. 334.420 Section 334.420 Navigation and Navigable Waters CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY, DEPARTMENT OF DEFENSE DANGER ZONE AND RESTRICTED AREA REGULATIONS § 334.420 Pamlico Sound and adjacent waters, N.C.; danger zones for Marine Corps operations....

  20. Sulphur and oxygen sequestration of n-C37 and n-C38 unsaturated ketones in an immature kerogen and the release of their carbon skeletons during early stages of thermal maturation

    Science.gov (United States)

    Koopmans, M.P.; Schaeffer-Reiss, C.; De Leeuw, J. W.; Lewan, M.D.; Maxwell, J.R.; Schaeffer, P.; Sinninghe, Damste J.S.

    1997-01-01

    Sedimentary rock from the Gessoso-solfifera Formation (Messinian) in the Vena del Gesso Basin (northern Italy) containing immature (Ro = 0.25%) S-rich organic matter was artificially matured by hydrous pyrolysis at temperatures from 160 to 330??C for 72 h to study the diagenetic fate of n-C37 and n-C38 di-and tri-unsaturated methyl and ethyl ketones (alkenones) biosynthesised by several prymnesiophyte algae. During early diagenesis, the alkenones are incorporated into the kerogen by both sulphur and oxygen cross-linking as indicated by chemical degradation experiments with the kerogen of the unheated sample. Heating at temperatures between 160 and 260??C, which still represents early stages of thermal maturation, produces large amounts (up to 1 mg/g TOC) of S-bound, O-bound, and both S-and O-bound n-C37 and n-C38 skeletons, saturated n-C37 and n-C38 methyl, ethyl, and mid-chain ketones, C37 and C38 mid-chain 2,5-di-n-alkylthiophenes, C37 and C38 1,2-di-n-alkylbenzenes, and C37 and C38 n-alkanes. With increasing thermal maturation, three forms of the n-C37 and n-C38 skeletons are relatively stable (saturated hydrocarbons, 1,2-di-n-alkylbenzenes and saturated ketones), whereas the S-and O-bound skeletons are relatively labile. These results suggest that in natural situations saturated ketones with an n-C37 and n-C38 skeleton can be expected as well as the corresponding hydrocarbons. Copyright ?? 1997 Elsevier Science Ltd.

  1. 75 FR 68728 - Airworthiness Directives; Bombardier, Inc. Model CL-215-1A10 (CL-215), CL-215-6B11 (CL-215T...

    Science.gov (United States)

    2010-11-09

    ... Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic impact, positive or.... Model CL-215-1A10 (CL- 215), CL-215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) Airplanes...: * * * * * Seven cases of on-ground hydraulic accumulator screw cap or end cap failure have been experienced on...

  2. 76 FR 41653 - Airworthiness Directives; Bombardier, Inc. Model CL-600-2A12 (CL-601) and CL-600-2B16 (CL-601-3A...

    Science.gov (United States)

    2011-07-15

    ... products. That NPRM was published in the Federal Register on January 5, 2011 (76 FR 477). That NPRM...; 2. Is not a ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034.... Model CL-600-2A12 (CL- 601) and CL-600-2B16 (CL-601-3A, CL-601-3R, and CL-604 Variants) Airplanes...

  3. ClEST cluster :Cl_contig0243 [ClEST

    Lifescience Database Archive (English)

    Full Text Available Cl_contig0243 barrier-to-autointegration factor Cimex lectularius nuclear gene 428 ...TAATAAATACAGTATGATGTGCG fb29038 fs25084 mb23031 3 barrier to autointegration factor [Rhodnius prolixus] AEL79235 5.9E-56 GO:0003677 ...

  4. ClEST cluster :Cl_singleton0416 [ClEST

    Lifescience Database Archive (English)

    Full Text Available Cl_singleton0416 ornithine aminotransferase Cimex lectularius nuclear gene 438 TATC...CAGTTTGCCGAGTATATCACCCGTTATTT fb20049 1 PREDICTED: probable ornithine aminotransferase-like [Glycine max] XP_003531161 4.30167E-26 GO:0008483 ...

  5. ClEST cluster :Cl_singleton2093 [ClEST

    Lifescience Database Archive (English)

    Full Text Available Cl_singleton2093 selenoprotein t Cimex lectularius nuclear gene 435 GAGAAGGAGATTCCG...GAGACGGGAAGAATA mb12059 1 selenoprotein T [Glossina morsitans morsitans] ADD19835 7.29481E-59 GO:0045454 GO:0008430 GO:0005575 ...

  6. ClEST cluster :Cl_contig0231 [ClEST

    Lifescience Database Archive (English)

    Full Text Available Cl_contig0231 bcl2 adenovirus e1b 19 kda protein-interacting Cimex lectularius nucl...AGCCGTCCGGACCAATTTCCACCAAAGGATTGGAAACTGAGGCATCCGGCTCGGAAAACTCTCTCAATACGCACGAC fs06082 fw15056 mb10031 3 BCL2/adenovirus

  7. Guide update Severe Accident Management (SAMG) of CN. Almaraz post Fukushima; Actualizacion de las Guias de Gestion de Accidente Severo (GGAS) de CN. Almaraz post Fukushima

    Energy Technology Data Exchange (ETDEWEB)

    Martinez Fanegas, R.; Aguado Miquel, F.; Tanarro Onrubia, A.; Uruburu Rodriguez, A.

    2014-07-01

    The work is part of the activities carried out by CN. Almaraz in applying lessons learned from the Fukushima accident. The achievement of this objective requires a substantial change in the Guidelines Severe Accident Management (SAMG), starting with the adaptation of the Revision 2 of the Generic Guidelines (SAMG) Owners Group (PWROG, January 2013), which is the work is the fundamental part of this paper. (Author)

  8. Electrochemical and Kinetic Behaviors of Fe(Ⅱ) Ion in DMSO, DMF and CH3CN

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The cyclic voltammetry, current-time curve at potential step were used to investigate the electrochemical behavior of Fe(Ⅱ) in DMSO, DMF and CH3CN solutions on Pt cathode. Experimental results indicate that the electroreduction of Fe(Ⅱ) to Fe(0) is irreversible in one step on Pt electrode. The diffusion coefficients of Fe(Ⅱ) in DMSO, DMF and CH3CN solutions at 298 K were determined to be 2.3×10-6, 1.32×10-6 and 2.5×10-6 cm2*s-1, respectively. The transfer coefficients of Fe(Ⅱ)+2e→Fe(0) in DMSO, DMF and CH3CN solutions were determined to be 0.11, 0.10 and 0.06, respectively.

  9. CN molecule collisions with H+ at a wide range of astrophysical energies

    CERN Document Server

    Sultanova, Madina R

    2012-01-01

    We analyze the quantum-mechanical rotational excitation/de-excitation spectrum and cross sections of CN molecules during low and high-energy collisions with protons, H+. The problem is of significant importance in astrophysics of the early Universe, specifically connected with the problems of cosmic microwave background (CMB) radiation. A quantum-mechanical close-coupling method is applied in this work. The cyanide molecule (CN) is treated as a rigid rotor, i.e. the distance between the carbon and nitrogen atoms is fixed at an average equilibrium value. The new results of the excitation/de-excitation cross-sections and corresponding thermal rate coefficients are compared with the results of few previous calculations performed on the basis of few approximate semiclassical frameworks. The interaction potential between CN and H+ is taken in the following form: proton induced polarization potential + proton-dipole potential + proton-quadrupole potential.

  10. Kinetic analysis of simultaneous denitrification and biomineralization of novel Acinetobacter sp. CN86.

    Science.gov (United States)

    Su, Jun-Feng; Shi, Jing-Xin; Huang, Ting-Lin; Ma, Fang

    2016-08-15

    A novel aerobic denitrification and biomineralization strain CN86 was isolated from the Qu Jiang artificial lake. Based on phylogenetic characteristics, the isolated strain was identified as Acinetobacter species. Strain CN86 was confirmed to have the ability to perform simultaneous denitrification and biomineralization. Exponential decay equation was used for the matching of kinetic processes on denitrification and biomineralization. A highest nitrate removal rate was achieved at the pH7.0, organic concentration of 1.5g/L and temperature of 30°C. An optimal hardness removal rate was obtained at the pH9.0, organic concentration of 2.0g/L and temperature of 30°C. Strain CN86 is a suitable candidate for the simultaneous removal of nitrate and hardness in groundwater treatment. PMID:27287863

  11. Thermodynamic study of CN~- ion inhibition of Jack bean urease using the extended solvation theory

    Institute of Scientific and Technical Information of China (English)

    G. Rezaei Behbehani; A.A. Saboury; M. Mohebbian; S. Tahmasbi Sarvestani; M. Poorheravi

    2009-01-01

    Cyanide ion was studied as an inhibitor of Jack bean urease at 300 K in 30 mmol/L tris buffer, Ph 7. The inhibition was investigated by isothermal titration calorimetry (ITC). The extended solvation model was used for CN~- + JBU interaction over the whole range of CN~- concentrations. The binding parameters recovered from the solvation model were attributed to the cyanide ion interaction. It was found that cyanide ion acted as a non-cooperative inhibitor of urease, and there is a set of 12 ± 0.12 identical and independent binding sites for CN~- ions. The dissociation equilibrium constant is 749.99 μmol/L. The molar enthalpy of binding is △H=-13.60 KJ mol~(-1).

  12. NC2213: a novel methionine aminopeptidase 2 inhibitor in human colon cancer HT29 cells

    Directory of Open Access Journals (Sweden)

    Pati Hari N

    2009-08-01

    Full Text Available Abstract Methionine aminopeptidase 2 (MetAP2 is a bifunctional protein that plays a critical role in the regulation of post-translational processing and protein synthesis. MetAP2 is overexpressed in human colon cancer. In this report we screened various MetAP2 inhibitors and treated HT29 cells with various concentrations of compounds. We evaluated the expression of MetAP2 and pp60c-src expressions in HT29 cells. In addition we also carried out the cell proliferation and cell cycle analysis in the MetAP2 inhibitor-treated HT29 cells. The cell cycle analysis of HT29 treated with 1.0 μM of NC2213 showed an arrest in the G2 phase followed by an induction in the percentage of cells undergoing apoptosis in the sub-G1 phase. Western blot analysis revealed that the MetAP2 expression was dose-dependently decreased when the HT29 cells were treated with the 3,5-bis(benzylidene-4-piperidone derivative (NC2213. In addition, phosphorylation of Src, a myristoylated oncoprotein was significantly decreased by 1.0 μM of NC2213 as revealed by Western blot analysis. Furthermore, NC2213 also inhibits the expression of pp60c-src in HT29 cells. Interestingly, this compound also inhibits the phosphorylation at Tyr416 of pp60c-src while increasing the phosphorylation at Tyr527 of pp60c-src. NC2213 inhibits the growth of HT29 cells by inducing apoptosis and might be useful for the treatment of human colon cancer.

  13. Ground State Reactions of nC60 with Free Chlorine in Water.

    Science.gov (United States)

    Wu, Jiewei; Benoit, Denise; Lee, Seung Soo; Li, Wenlu; Fortner, John D

    2016-01-19

    Facile, photoenhanced transformations of water-stable C60 aggregates (nC60) to oxidized, soluble fullerene derivatives, have been described as key processes in understanding the ultimate environmental fate of fullerene based materials. In contrast, fewer studies have evaluated the aqueous reactivity of nC60 during ground-state conditions (i.e., dark conditions). Herein, this study identifies and characterizes the physicochemical transformations of C60 (as nC60 suspensions) in the presence of free chlorine, a globally used chemical oxidant, in the absence of light under environmentally relevant conditions. Results show that nC60 undergoes significant oxidation in the presence of free chlorine and the oxidation reaction rates increase with free chlorine concentration while being inversely related to solution pH. Product characterization by FTIR, XPS, Raman Spectroscopy, TEM, XRD, TOC, collectively demonstrates that oxidized C60 derivatives are readily formed in the presence of free chlorine with extensive covalent oxygen and even chlorine additions, and behave as soft (or loose) clusters in solution. Aggregation kinetics, as a function of pH and ionic strength/type, show a significant increase in product stabilities for all cases evaluated, even at pH values approaching 1. As expected with increased (surface) oxidation, classic Kow partitioning studies indicate that product clusters are relatively more hydrophilic than parent (reactant) nC60. Taken together, this work highlights the importance of understanding nanomaterial reactivity and the identification of corresponding stable daughter products, which are likely to differ significantly from parent material properties and behaviors.

  14. Synthesis of polypyrrole within the cell wall of yeast by redox-cycling of [Fe(CN)6](3-)/[Fe(CN)6](4-).

    Science.gov (United States)

    Ramanavicius, Arunas; Andriukonis, Eivydas; Stirke, Arunas; Mikoliunaite, Lina; Balevicius, Zigmas; Ramanaviciene, Almira

    2016-02-01

    Yeast cells are often used as a model system in various experiments. Moreover, due to their high metabolic activity, yeast cells have a potential to be applied as elements in the design of biofuel cells and biosensors. However a wider application of yeast cells in electrochemical systems is limited due to high electric resistance of their cell wall. In order to reduce this problem we have polymerized conducting polymer polypyrrole (Ppy) directly in the cell wall and/or within periplasmic membrane. In this research the formation of Ppy was induced by [Fe(CN)6](3-)ions, which were generated from K4[Fe(CN)6], which was initially added to polymerization solution. The redox process was catalyzed by oxido-reductases, which are present in the plasma membrane of yeast cells. The formation of Ppy was confirmed by spectrophotometry and atomic force microscopy. It was confirmed that the conducting polymer polypyrrole was formed within periplasmic space and/or within the cell wall of yeast cells, which were incubated in solution containing pyrrole, glucose and [Fe(CN)6](4-). After 24h drying at room temperature we have observed that Ppy-modified yeast cell walls retained their initial spherical form. In contrast to Ppy-modified cells, the walls of unmodified yeast have wrinkled after 24h drying. The viability of yeast cells in the presence of different pyrrole concentrations has been evaluated.

  15. Energy-transfer rate in crystals of double-complex salts composed of [Ru(N-N)3](2+) (N-N = 2,2'-bipyridine or 1,10-phenanthroline) and [Cr(CN)6](3-): effect of relative orientation between donor and acceptor.

    Science.gov (United States)

    Otsuka, T; Sekine, A; Fujigasaki, N; Ohashi, Y; Kaizu, Y

    2001-07-01

    A block single-crystal was obtained using a diffusion method with a concentrated acetone-water (vol. 1/1) solution of [Ru(phen)(3)]Cl(2).6H(2)O (phen = 1,10-phenanthroline) and a concentrated aqueous solution of K(3)[Cr(CN)(6)], without evaporating solvents. The crystal was identified as a double-complex salt including two acetone and fourteen solvent water molecules, [Ru(phen)(3)](2)[Cr(CN)(6)]Cl.2(CH(3))(2)CO.14H(2)O (1). Measurement of the X-ray diffraction pattern of the double-complex salt was performed using an X-ray diffractometer with an Imaging-Plate (IP) Weissenberg camera. 1 crystallizes in the triclinic space group P1, with a = 13.930(5) A, b = 14.783(5) A, c = 11.137(6) A, alpha = 89.87(4) degrees, beta = 107.47(3) degrees, gamma = 96.68(3) degrees, and Z = 2. The crystal structure is very different from that of [Ru(bpy)(3)](2)[Cr(CN)(6)]Cl.8H(2)O (2) (bpy = 2,2'-bipyridine), which could be obtained using the same procedure and crystallizes in the monoclinic space group C2, with a = 22.414(2) A, b = 13.7686(15) A, c = 22.207(2) A, beta = 90.713(8) degrees, and Z = 4. The distance between the central-metal ions of ruthenium(II) and chromium(III) complexes in [Ru(phen)(3)](2)[Cr(CN)(6)]Cl.2(CH(3))(2)CO.14H(2)O (7.170 A) is shorter than that in [Ru(bpy)(3)](2)[Cr(CN)(6)]Cl.8H(2)O (9.173 A) by about 2 A, while the rate of energy transfer from the (3)MLCT state of [Ru(N-N)(3)](2+) to the (2)E(g) state of [Cr(CN)(6)](3-) in the former salt (9.5 x 10(5) s(-1)) is far slower than that in the latter one (6.0 x 10(6) s(-1)) at 77 K. These results indicate that the energy-transfer rate strongly depends, not upon the distance between central metal ions, rather, upon the mutual relative orientation between the donor and the acceptor complexes in double-complex salts.

  16. PROBING THE GASEOUS DISK OF T Tau N WITH CN 5-4 LINES

    Energy Technology Data Exchange (ETDEWEB)

    Podio, L.; Codella, C. [INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50125, Florence (Italy); Kamp, I.; Meijerink, R.; Spaans, M. [Kapteyn Astronomical Institute, University of Groningen, Landleven 12, 9747 AD Groningen (Netherlands); Nisini, B. [INAF-Osservatorio Astronomico di Roma, via di Frascati 33, I-00040, Monte Porzio Catone (Italy); Aresu, G. [INAF-Osservatorio Astronomico di Cagliari, Via della Scienza 5, I-09047, Selargius (Italy); Brittain, S. [Department of Physics and Astronomy, 118 Kinard Laboratory, Clemson University, Clemson, SC 29634 (United States); Cabrit, S.; Dougados, C.; Thi, W.-F. [UJF-Grenoble 1/CNRS-INSU, Institut de Planétologie et d' Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble, F-38041 (France); Grady, C. [Eureka Scientific, 2452 Delmer, Suite 100, Oakland, CA 96002 (United States); Sandell, G. [SOFIA-USRA, NASA Ames Research Center, MS 232-12, Building N232, Rm. 146, P.O. Box 1, Moffett Field, CA 94035-0001 (United States); White, G. J. [Department of Physical Sciences, The Open University, Milton Keynes, MK7 6AA (United Kingdom); Woitke, P. [SUPA, School of Physics and Astronomy, University of St. Andrews, KY16 9SS (United Kingdom)

    2014-03-10

    We present spectrally resolved observations of the young multiple system T Tau in atomic and molecular lines obtained with the Heterodyne Instrument for the Far Infrared on board Herschel. While CO, H{sub 2}O, [C II], and SO lines trace the envelope and the outflowing gas up to velocities of 33 km s{sup –1} with respect to systemic, the CN 5-4 hyperfine structure lines at 566.7, 566.9 GHz show a narrow double-peaked profile centered at systemic velocity, consistent with an origin in the outer region of the compact disk of T Tau N. Disk modeling of the T Tau N disk with the thermo-chemical code ProDiMo produces CN line fluxes and profiles consistent with the observed ones and constrain the size of the gaseous disk (R{sub out}=110{sub −20}{sup +10} AU) and its inclination (i = 25°± 5°). The model indicates that the CN lines originate in a disk upper layer at 40-110 AU from the star, which is irradiated by the stellar UV field and heated up to temperatures of 50-700 K. With respect to previously observed CN 2-1 millimeter lines, the CN 5-4 lines appear to be less affected by envelope emission, due to their larger critical density and excitation temperature. Hence, high-J CN lines are a unique confusion-free tracer of embedded disks, such as the disk of T Tau N.

  17. Tribological development of TiCN coatings by adjusting the flowing rate of reactive gases

    Science.gov (United States)

    Tillmann, Wolfgang; Momeni, Soroush

    2016-03-01

    TiCN coatings were deposited by means of direct current magnetron sputtering of Ti targets in presence of N2 and C2H2 reactive gases. The microstructure, composition, mechanical and tribological properties of the deposited thin films were analyzed by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), nanoindentation, ball-on-disc, scratch test, and three dimensional (3D) optical microscopy. The obtained results presents a reproducible processing route for tailoring microstructure, mechanical and tribological behavior of TiCN coatings by controlling flowing rate of the reactive gases.

  18. Room temperature red emitting carbodiimide compound Ca(CN2):Mn2+

    Science.gov (United States)

    Kubus, Mariusz; Castro, Cristina; Enseling, David; Jüstel, Thomas

    2016-09-01

    Carbodiimides are a growing group of compounds, which raised interest as hosts for luminescent materials. Ca(CN2) doped with 5, 10 and 50 mol% Mn2+ was synthesized by a solid-state metathesis reaction at rather low temperature. The unit cell volume of Ca(CN2) decreases with increasing the Mn2+ concentration. The emission spectra of the doped material show an emission band in the red spectral range originating from the 4T1g(4G)-6A1g(6S) transition.

  19. Chemical transitions for interstellar C2 and CN in cloud envelopes

    Science.gov (United States)

    Federman, S. R.; Strom, C. J.; Lambert, D. L.; Cardelli, Jason A.; Smith, V. V.; Joseph, C. L.

    1994-01-01

    Observations were made of absorption from CH, C2, and CN toward moderately reddened stars in Sco, OB2, Ceo OB3, and Taurus/Auriga. For these directions, most of the reddening is associated with a single cloud complex, for example, the rho Ophiuchus molecular cloud, and as a result, the observations probe moderately dense material. When combined with avaliable data for nearby directions, the survey provides the basis for a comprehensive analysis of the chemistry for these species. The chemical transitions affecting C2 and CN in cloud envelopes were analyzed. The depth into a cloud at which a transition takes place was characterized by tau(sub uv), the grain optical depth at 1000 A. One transition at tau(sub uv) approx. = 2, which arises from, the conversion of C(+) into CO, affects the chemistries for both molecules because of the key role this ion plays. A second one involving production terms in the CN chemistry occurs at tau(sub uv) of approx. = 3; neutral reactions which C2 and CH is more important at larger values for tau(sub uv). The transition from photodissociation to chemical destruction takes place at tau(sub uv) approx. = 4.5 for C2 and CN. The observational data for stars in Sco OB2, Cep OB3, and Taurus/Auriga were studied with chemical rate equations containing the most important production and destruction mechanisms. Because the sample of stars in Sco OB2 includes sight lines with A(sub v) ranging from 1-4 mag, sight lines dominated by photochemistry could be analyzed separately from those controlled by gas-phase destruction. The analysis yielded values for two poorly known rate constants for reactions involved in the production of CN; the reactions are C2 + N yields CN + C and C(+) + NH yields all products. The other directions were analyzed with the inferred values. The predicted column densities for C2 and CN agree with the observed values to better than 50%, and in most instances 20%. When combining the estimates for density and temperature derived

  20. Heat production in growing pigs calculated according to the RQ and CN methods

    DEFF Research Database (Denmark)

    Christensen, K; Chwalibog, André; Henckel, S;

    1988-01-01

    1. Heat production, calculated according to the respiratory quotient methods, HE(RQ), and the carbon nitrogen balance method, HE(CN), was compared using the results from a total of 326 balance trials with 56 castrated male pigs fed different dietary composition and variable feed levels during...... the difference. 6. In pigs receiving a cereal based diet, HE(RQ) may be expected to give 3-4% higher values than HE(CN), but in case easily available carbohydrates (glucose, sucrose) or high-fibre diets are provided, the differences may be larger. 7. Both methods were carried out with similar accuracy...

  1. ON THE SHARP GROWTH, COVERING THEOREMS FOR NORMALIZED BIHOLOMORPHIC MAPPINGS IN Cn

    Institute of Scientific and Technical Information of China (English)

    Liu Xiaosong; Liu Taishun

    2007-01-01

    In this article, a normalized biholomorphic mapping f defined on bounded starlike circular domain in Cn is considered, where z = 0 is a zero of order k + 1 of f(z) - z.The sharp growth, covering theorems for almost starlike mappings of order α and starlike mappings of order α are established. Meanwhile, the construction of the above mappings on bounded starlike circular domain in Cn is also discussed, it provides the extremal mappings for the growth, covering theorems of the above mappings.

  2. A One-Dimensional Magnet Based on [Mo(III)(CN)7](4.).

    Science.gov (United States)

    Wei, Xiao-Qin; Qian, Kun; Wei, Hai-Yan; Wang, Xin-Yi

    2016-06-01

    Self-assembly of the [Mo(III)(CN)7](4-) anion and the Mn(II) unit with a macrocyclic ligand results in the first example of a one-dimensional (1D) chain compound based on the heptacyanomolybdate, [Mn(LN5C10)]2[Mo(CN)7]·2H2O (LN5C10 = 1,4,7,10,13-pentaazacyclopentadecane). Because of the existence of the interchain magnetic coupling, long-rang magnetic ordering was observed in this compound.

  3. Esterification and Chemoselective Synthesis of R-Tetrahydrothiazo-2- thione-4-carboxylic Esters Catalyzed by TiCl4

    Institute of Scientific and Technical Information of China (English)

    SHANG Yan-mei; LI Jing; SONG Zhi-guang; LI Ye-zhi; HUANG Hua-min

    2007-01-01

    A series of esters of R-tetrahydrothiazo-2-thione-4-carboxylic acid[ R-TTCA] was synthesized by direct esterification of R-TTCA with alcohols(CH3OH, C2H5OH, n-C3H7OH, i-C3H7OH, n-C4H9OH, sec-C4H9OH) in the presence of TiCl4 as the catalyst at room temperature without using any other solvent or dehydrant in high yields,91.6%-99.1% for primary alcohols and 55%- 80% for secondary alcohols. The catalyst has a strong chemoselecfive activity for the esterification of primary alcohols with R-TTCA in the presence of secondary alcohols. Owing to high yield, high chemoselectivity, and mild conditions used, this is an efficient method for the esterification of primary alcohols with R-TTCA.

  4. Ring Opening Metathesis Polymerization of Norbornene and Derivatives by the Triply Bonded Ditungsten Complex Na[W2(µ-Cl3Cl4(THF2]·(THF3

    Directory of Open Access Journals (Sweden)

    Georgios Floros

    2012-11-01

    Full Text Available In this study, the reactions of the bimetallic compound Na[W2(µ-Cl3Cl4(THF2]·(THF3 (1, (W 3 W6+, a'2e'4 with norbornene (NBE and some of its derivatives (5-X-2-NBE; X = COOH (NBE–COOH, OH (NBE–OH, CN (NBE–CN, COOMe (NBE–COOMe, CH=CH2 (VNBE; norbornadiene (NBD are described. Complex 1 contains a tungsten–tungsten triple bond, bearing three halide bridges and two labile THF ligands, in a cisoidal relationship along the metal–metal axis. The complex was found to be a highly efficient room temperature homogeneous and heterogeneous unicomponent initiator for the catalytic ring opening metathesis polymerization (ROMP of most substrates. NBE provides polynorbornene (PNBE of high molecular weight (Mw in high yields, soluble in organic solvents. The reaction proceeds with high cis-stereoselectivity (80%–86% cis, independently of the reaction conditions. Strongly coordinating pendant groups (–COOH, –OH, –CN deactivate 1, whereas substrates bearing softer ones (–COOMe, –CH=CH2 are quantitatively polymerized. NBD gives quantitatively insoluble PNBD. The polymers have been characterized by 1H, 13C NMR and Size Exclusion Chromatography (SEC. Monitoring the reactions in situ by 1H NMR (1/NBD or NBE provides direct evidence of the metathetical nature of the polymerization with the observation of the active tungsten alkylidene propagating polymeric chains. Mechanistic aspects of the reactions are discussed.

  5. Meathod of determining CN value in the SCS-CN method%SCS-CN径流模型中CN值确定方法研究

    Institute of Scientific and Technical Information of China (English)

    符素华; 王向亮; 王红叶; 魏欣; 袁爱萍

    2012-01-01

    Water shortages and non-point pollution caused by soil erosion have reached crises point in many regions. Hydrological model, soil erosion model and nun-point pollution model have been used as the main technique tools which evaluate the risk of water resources, soil erosion and water pollution. Runoff calculation is an important part in the hydrological models and is the basic element in the calculation of water contaminants including sediment, nutrients and pesticides etc. Soil Conservation Service Curve Number (SCS -CN) method has been widely used in many countries and regions. Runoff curve number ( CN) is an integrated parameter in the SCS - CN method , which reflects the effect of soil water content, soil type and land use etc, on runoff depth. But SCS - CN method may result in bad prediction accuracy in China because the values of eurve number provided by USDA Soil Conservation Service can not be directly used in China due to the differences in landuse, hydrologic soil groups and slope gradient etc. Thus the purpose of this study was to compare the differences in determining CN value by using mean method, arithmetic -mean method, median method, S probability distribution method and asymptotic method and to compare the accuracy of runoff predicted by differenl CN value. Data of rainfall - runoff from three runoff plots at Shixia, Miyun, Beijing, with a period from 1993 to 2006, were used. Runoff depth was calculated by u-sing SCS -CN method with different CN determining methods. The index of Nash model efficiency, cnrrelation co- efficient and acceptance rate were used to evaluate the accuracy of runoff depth predicted by different CN determining methods. The results show that the runoff depth predicted by five methods was significantly different from the measured ones. The asymptotic method had the best Nash model efficiency. But arithmetic - mean method provided with the best correlation coefficient and acceptance rate. Compared to asymptotic method

  6. Sodium uptake in cell construction and subsequent in operando electrode behaviour of Prussian blue analogues, Fe[Fe(CN)6](1-x)·yH2O and FeCo(CN)6.

    Science.gov (United States)

    Pramudita, James C; Schmid, Siegbert; Godfrey, Thomas; Whittle, Thomas; Alam, Moshiul; Hanley, Tracey; Brand, Helen E A; Sharma, Neeraj

    2014-11-28

    The development of electrodes for ambient temperature sodium-ion batteries requires the study of new materials and the understanding of how crystal structure influences properties. In this study, we investigate where sodium locates in two Prussian blue analogues, Fe[Fe(CN)6]1-x·yH2O and FeCo(CN)6. The evolution of the sodium site occupancies, lattice and volume is shown during charge-discharge using in situ synchrotron X-ray powder diffraction data. Sodium insertion is found to occur in these electrodes during cell construction and therefore Fe[Fe(CN)6]1-x·yH2O and FeCo(CN)6 can be used as positive electrodes. NazFeFe(CN)6 electrodes feature higher reversible capacities relative to NazFeCo(CN)6 electrodes which can be associated with a combination of structural factors, for example, a major sodium-containing phase, ∼Na0.5FeFe(CN)6 with sodium locating either at the x = y = z = 0.25 or x = y = 0.25 and z = 0.227(11) sites and an electrochemically inactive sodium-free Fe[Fe(CN)6]1-x·yH2O phase. This study demonstrates that key questions about electrode performance and attributes in sodium-ion batteries can be addressed using time-resolved in situ synchrotron X-ray diffraction studies. PMID:25072188

  7. Corrosion resistance appraisal of TiN, TiCN and TiAlN coatings deposited by CAE-PVD method on WC-Co cutting tools exposed to artificial sea water

    Science.gov (United States)

    Matei, A. A.; Pencea, I.; Branzei, M.; Trancă, D. E.; Ţepeş, G.; Sfăt, C. E.; Ciovica (Coman), E.; Gherghilescu, A. I.; Stanciu, G. A.

    2015-12-01

    A new advanced sintered composite cutting tool has been developed based on tungsten carbide matrix ligated with cobalt (WC-Co) additivated with tantalum carbide (TaC), titanium carbide (TiC) and niobium carbide (NbC) as grain growth inhibitors. Titanium nitride (TiN), titanium carbonitride (TiCN) and titanium aluminium nitride (TiAlN) coatings were deposited on these tools by CAE-PVD technique to find out the best solution to improve the corrosion resistance of this tool in marine environment. The electrochemical behaviours of the specimens in 3.5% NaCl water solution were estimated by potentiodynamic polarization measurements i.e. the open circuit potential (Eoc), corrosion potential (Ecorr) and corrosion current density (icorr). Wide angle X-ray diffraction (WAXD), optical microscopy (OM) and atomic force microscopy (AFM) investigations have been carried on tested and untested specimens to substantiate the corrosion resistance of the tested specimens. Based on the open circuit potential (Eoc) and corrosion potential (Ecorr) results, the tested specimens were ranked as TiN, TiAlN, TiCN and WC-Co while on corrosion current density (icorr) and protective efficiency (P) values they have been ranked as TiN, TiAlN, WC-Co and TiCN. The WAXD, MO and AFM results unambiguously show that the corrosion resistance depends on the nature and morphology of the coating.

  8. Dynamical Interpretation of the Nucleon-Nucleon Interaction and Exchange Currents in the Large $N_C$ Limit

    CERN Document Server

    Riska, D O

    2002-01-01

    Expression of the nucleon-nucleon Interaction to order $1/N_C$ in terms of Fermi Invariants allows a dynamical interpretation of the interaction and leads to a consistent construction of the associated interaction currents to order $1/N_C$. The numerically significant components of 4 different modern realistic phenomenological interaction models are shown to admit very similar meson exchange interpretations in the large $N_C$ limit. Moreover the ratio of the volume integrals of the leading, next-to-leading and next-to-next leading order terms in these interaction models is roughly 300:5-10:0.1, which corresponds fairly well to the ratios of $1/N_C^2$ between the terms that would be suggested by the $1/N_C$ expansion if $N_C=3$. The $N_C$ dependence of the electromagnetic and axial interaction currents that are associated with these interaction components is derived and compared to that of the corresponding single nucleon currents.

  9. Structure and Composition of Molecular Clouds with CN Zeeman Detections I: W3OH

    CERN Document Server

    Hakobian, Nicholas S

    2011-01-01

    We have carried out a multi-species study of a region which has had previous measurements of strong magnetic fields through the CN Zeeman effect in order to to explore the relationship between CN and N$_2$H$^+$, both of which have evidence that they remain in the gas phase at densities of 10$^5$ - 10$^6$ cm$^{-3}$. To achieve this we map the 1 arcmin$^2$ region around the UCHII region of W3(OH) using the Combined Array for Millimeter-wave Astronomy (CARMA). Approximately 105 hours of data were collected in multiple array configurations to produce maps with an effective resolution of $\\sim$ 2.5\\arcsec at high signal-to-noise in CN, C$^{18}$O, HCN, HCO$^+$, N$_2$H$^+$, and two continuum bands (91.2 GHz and 112 GHz). These data allow us to compare tracer molecules associated with both low and high density regions to infer gas properties. We determine that CARMA resolves out approximately 35% of the CN emission around W3(OH) when compared with spectra obtained from the IRAM-30 meter telescope. The presence of str...

  10. Characterization and antibacterial performance of ZrCN/amorphous carbon coatings deposited on titanium implants

    Energy Technology Data Exchange (ETDEWEB)

    Lai, Chih-Ho [School of Medicine, China Medical University, Taichung, 404 Taiwan (China); Chang, Yin-Yu, E-mail: yinyu@mail2000.com.tw [Department of Mechanical and Computer-Aided Engineering, National Formosa University, Yunlin, Taiwan (China); Huang, Heng-Li [School of Dentistry, China Medical University, Taichung, Taiwan (China); Kao, Ho-Yi [Department of Materials Science and Engineering, Mingdao University, Changhua, Taiwan (China)

    2011-12-30

    Titanium (Ti)-based materials have been used for dental/orthopedic implants due to their excellent biological compatibility, superior mechanical strength and high corrosion resistance. The osseointegration of Ti implants is related to their composition and surface treatment. Better biocompatibility and anti-bacterial performances of Ti implant are beneficial for the osseointegration and for avoiding the infection after implantation surgery. In this study, nanocomposite ZrCN/amorphous carbon (a-C) coatings with different carbon contents were deposited on a bio-grade pure Ti implant material. A cathodic-arc evaporation system with plasma enhanced duct equipment was used for the deposition of ZrCN/a-C coatings. Reactive gas (N{sub 2}) and C{sub 2}H{sub 2} activated by the zirconium plasma in the evaporation process were used to deposit the ZrCN/a-C coatings. To verify the susceptibility of implant surface to bacterial adhesion, Actinobacillus actinomycetemcomitans (A. actinomycetemcomitans), one of the major pathogen frequently found in the dental implant-associated infections, was chosen for in vitro anti-bacterial analyses. In addition, the biocompatibility of human gingival fibroblast (HGF) cells on coatings was also evaluated by a cell proliferation assay. The results suggested that the ZrCN/a-C coatings with carbon content higher than 12.7 at.% can improve antibacterial performance with excellent HGF cell compatibility as well.

  11. Quantitative and sensitive analysis of CN molecules using laser induced low pressure He plasma

    International Nuclear Information System (INIS)

    We report the results of experimental study on CN 388.3 nm and C I 247.8 nm emission characteristics using 40 mJ laser irradiation with He and N2 ambient gases. The results obtained with N2 ambient gas show undesirable interference effect between the native CN emission and the emission of CN molecules arising from the recombination of native C ablated from the sample with the N dissociated from the ambient gas. This problem is overcome by the use of He ambient gas at low pressure of 2 kPa, which also offers the additional advantages of cleaner and stronger emission lines. The result of applying this favorable experimental condition to emission spectrochemical measurement of milk sample having various protein concentrations is shown to yield a close to linear calibration curve with near zero extrapolated intercept. Additionally, a low detection limit of 5 μg/g is found in this experiment, making it potentially applicable for quantitative and sensitive CN analysis. The visibility of laser induced breakdown spectroscopy with low pressure He gas is also demonstrated by the result of its application to spectrochemical analysis of fossil samples. Furthermore, with the use of CO2 ambient gas at 600 Pa mimicking the Mars atmosphere, this technique also shows promising applications to exploration in Mars

  12. Fatigue Behavior of TiN and TiCN Coated a Rotor Turbine Steel

    Science.gov (United States)

    Suh, Chang Min; Kim, Kyung Ryul; Kang, Yong Goo; Suh, Duck Young; Kim, Chang Keun

    In order to clarify the effect of ceramic coating films on the fatigue strength, and crack initiation of material, fatigue tests were carried out in room air, using the round plain specimens and compact tension specimens of 1Cr-1Mo-0.25V steel coated with TiN and TiCN are ion plating (AIP) process. It was observed that the scatter band of fatigue life at low fatigue strengths was wider than that at high fatigue strengths. The obvious improvement of fatigue life was confirmed in TiCN coated specimens for the region of low fatigue strengths, as compared with uncoated and TiN coated specimens. It was explained that the increase of fatigue life in the TiCN coated material was attributed to the retardation of crack initiation due to the restriction of surface plastic deformation in the substrate with hard coating layer. Also, the fatigue strength at 107 cycles of ceramic coated material was increased about 15 ~ 21% higher than that of base material. The fatigue crack of TiCN coated material was mainly initiated at the inclusions of Al compositions near the substrate under coating film.

  13. Monitoring of the future strong Vrancea events by using the CN formal earthquake prediction algorithm

    International Nuclear Information System (INIS)

    The preparation process of the strong subcrustal events originating in Vrancea region, Romania, is monitored using an intermediate-term medium-range earthquake prediction method - the CN algorithm (Keilis-Borok and Rotwain, 1990). We present the results of the monitoring of the preparation of future strong earthquakes for the time interval from January 1, 1994 (1994.1.1), to January 1, 2003 (2003.1.1) using the updated catalogue of the Romanian local network. The database considered for the CN monitoring of the preparation of future strong earthquakes in Vrancea covers the period from 1966.3.1 to 2003.1.1 and the geographical rectangle 44.8 deg - 48.4 deg N, 25.0 deg - 28.0 deg E. The algorithm correctly identifies, by retrospective prediction, the TJPs for all the three strong earthquakes (Mo=6.4) that occurred in Vrancea during this period. The cumulated duration of the TIPs represents 26.5% of the total period of time considered (1966.3.1-2003.1.1). The monitoring of current seismicity using the algorithm CN has been carried out since 1994. No strong earthquakes occurred from 1994.1.1 to 2003.1.1 but the CN declared an extended false alarm from 1999.5.1 to 2000.11.1. No alarm has currently been declared in the region (on January 1, 2003), as can be seen from the TJPs diagram shown. (author)

  14. Structure of MoCN films deposited by cathodic arc evaporation

    International Nuclear Information System (INIS)

    Molybdenum carbonitride (MoCN) coatings were deposited onto HS6-5-2 steel substrate using pure Mo targets in mixed acetylene and nitrogen atmosphere by cathodic arc evaporation. The structural properties of MoCN coatings with different carbon contents (as an effect of the C2H2 flow rate) were investigated systematically. Phase and chemical composition evolution of the coatings were characterized both by the glancing angle of X-ray diffraction (XRD) and wavelength dispersive spectrometry, respectively. These analyses have been supplemented by estimates of grain sizes and stress in the coatings. The XRD results show that the increase in acetylene flow rate causes the formation of molybdenum carbide (MoC) hexagonal phase in the coatings, a reduction of grain size and an increase in internal stress. - Highlights: • MoN and MoCN coatings were deposited by cathodic arc evaporation in nitrogen atmosphere. • MoCN coatings were formed using different acetylene flow rates. • Phase composition evolution was observed. • Crystallite size and stress were calculated

  15. On PPT States in CK ○×CM ○×CN Composite Quantum Systems

    Institute of Scientific and Technical Information of China (English)

    WANGXiao-Hong; FEIShao-Ming; WANGZhi-Xi; WUKe

    2004-01-01

    We study the general representations of positive partial transpose (PPT) states in CK ○×CM ○×CN . For the PPT states with rank-N a canonical form is obtained, from which a sufficient separability condition is presented.

  16. Nano-galvanic coupling for enhanced Ag+ release in ZrCN-Ag films : Antibacterial application

    NARCIS (Netherlands)

    Calderon, S.; Ferreri, I.; Henriques, M.; De Hosson, J. T. M.; Cavaleiro, A.; Carvalho, S.

    2016-01-01

    The antibacterial properties of materials developed for medical devices with embedded silver nanoparticles are enhanced by controlling the release of silver ions. In this study, a simple experimental procedure for the augmentation of the silver ion release from ZrCN-Ag coatings is described. The sil

  17. Quantitative and sensitive analysis of CN molecules using laser induced low pressure He plasma

    Energy Technology Data Exchange (ETDEWEB)

    Pardede, Marincan [Department of Electrical Engineering, University of Pelita Harapan, 1100 M.H. Thamrin Boulevard, Lippo Village, Tangerang 15811 (Indonesia); Hedwig, Rinda [Department of Computer Engineering, Bina Nusantara University, 9 K.H. Syahdan, Jakarta 14810 (Indonesia); Abdulmadjid, Syahrun Nur; Lahna, Kurnia; Idris, Nasrullah; Ramli, Muliadi [Department of Physics, Faculty of Mathematics and Natural Sciences, Syiah Kuala University, Darussalam, Banda Aceh 23111, NAD (Indonesia); Jobiliong, Eric [Department of Industrial Engineering, University of Pelita Harapan, 1100 M.H. Thamrin Boulevard, Lippo Village, Tangerang 15811 (Indonesia); Suyanto, Hery [Department of Physics, Faculty of Mathematics and Natural Sciences, Udayana University, Kampus Bukit Jimbaran, Denpasar 80361, Bali (Indonesia); Marpaung, Alion Mangasi [Department of Physics, Faculty of Mathematics and Natural Sciences, Jakarta State University, 10 Rawamangun, Jakarta 13220 (Indonesia); Suliyanti, Maria Margaretha [Research Center for Physics, Indonesia Institute of Sciences, Kawasan Puspiptek, Serpong, Tangerang Selatan, 15314 Banten (Indonesia); Tjia, May On [Physics of Magnetism and Photonics Group, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, 10 Ganesha, Bandung 40132 (Indonesia); Research Center of Maju Makmur Mandiri Foundation, 40/80 Srengseng Raya, Jakarta 11630 (Indonesia); Lie, Tjung Jie; Lie, Zener Sukra; Kurniawan, Davy Putra; Kurniawan, Koo Hendrik, E-mail: kurnia18@cbn.net.id [Research Center of Maju Makmur Mandiri Foundation, 40/80 Srengseng Raya, Jakarta 11630 (Indonesia); Kagawa, Kiichiro [Research Center of Maju Makmur Mandiri Foundation, 40/80 Srengseng Raya, Jakarta 11630 (Indonesia); Fukui Science Education Academy, Takagi Chuou 2 choume, Fukui 910-0804 (Japan)

    2015-03-21

    We report the results of experimental study on CN 388.3 nm and C I 247.8 nm emission characteristics using 40 mJ laser irradiation with He and N{sub 2} ambient gases. The results obtained with N{sub 2} ambient gas show undesirable interference effect between the native CN emission and the emission of CN molecules arising from the recombination of native C ablated from the sample with the N dissociated from the ambient gas. This problem is overcome by the use of He ambient gas at low pressure of 2 kPa, which also offers the additional advantages of cleaner and stronger emission lines. The result of applying this favorable experimental condition to emission spectrochemical measurement of milk sample having various protein concentrations is shown to yield a close to linear calibration curve with near zero extrapolated intercept. Additionally, a low detection limit of 5 μg/g is found in this experiment, making it potentially applicable for quantitative and sensitive CN analysis. The visibility of laser induced breakdown spectroscopy with low pressure He gas is also demonstrated by the result of its application to spectrochemical analysis of fossil samples. Furthermore, with the use of CO{sub 2} ambient gas at 600 Pa mimicking the Mars atmosphere, this technique also shows promising applications to exploration in Mars.

  18. VECTOR-VALUED RANDOM POWER SERIES ON THE UNIT BALL OF Cn

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    In this article, the authors study the vector-valued random power series on the unit ball of Cn and get vector-valued Salem-Zygmund theorem for them by using martingale technique. Further, the relationships between vector-valued random power series and several function spaces are also studied.

  19. Life decrees: no wonder, this. Magazine drops CN Tower as a modern wonder

    CERN Multimedia

    Marshall, E

    2004-01-01

    "Life's December special edition, The Seven Wonders of the World: Yesterday, Today and Tomorrow, offers feature articles on six of the seven modern global wonders as chosen by the American Society of Civil Engineers (ASCE), but arbitrarily drops the CN Tower in favour of a particle research laboratory near Geneva, Switzerland" (1 page).

  20. Structure of MoCN films deposited by cathodic arc evaporation

    Energy Technology Data Exchange (ETDEWEB)

    Gilewicz, A., E-mail: adam.gilewicz@tu.koszalin.pl [Koszalin University of Technology, Faculty of Technology and Education, Sniadeckich 2, 75-453 Koszalin (Poland); Jedrzejewski, R.; Kochmanska, A.E. [West Pomeranian University of Technology Szczecin, Faculty of Mechanical Engineering and Mechatronics, 19 Piastów Ave., 70-313 Szczecin (Poland); Warcholinski, B. [Koszalin University of Technology, Faculty of Technology and Education, Sniadeckich 2, 75-453 Koszalin (Poland)

    2015-02-27

    Molybdenum carbonitride (MoCN) coatings were deposited onto HS6-5-2 steel substrate using pure Mo targets in mixed acetylene and nitrogen atmosphere by cathodic arc evaporation. The structural properties of MoCN coatings with different carbon contents (as an effect of the C{sub 2}H{sub 2} flow rate) were investigated systematically. Phase and chemical composition evolution of the coatings were characterized both by the glancing angle of X-ray diffraction (XRD) and wavelength dispersive spectrometry, respectively. These analyses have been supplemented by estimates of grain sizes and stress in the coatings. The XRD results show that the increase in acetylene flow rate causes the formation of molybdenum carbide (MoC) hexagonal phase in the coatings, a reduction of grain size and an increase in internal stress. - Highlights: • MoN and MoCN coatings were deposited by cathodic arc evaporation in nitrogen atmosphere. • MoCN coatings were formed using different acetylene flow rates. • Phase composition evolution was observed. • Crystallite size and stress were calculated.

  1. VLT observations of the asymmetric Etched Hourglass Nebula, MyCn 18

    CERN Document Server

    Clyne, N; Lloyd, M; Matsuura, M; Singh, N; Meaburn, J

    2014-01-01

    Context. The mechanisms that form extreme bipolar planetary nebulae remain unclear. Aims. The physical properties, structure, and dynamics of the bipolar planetary nebula, MyCn 18, are investigated in detail with the aim of understanding the shaping mechanism and evolutionary history of this object. Methods. VLT infrared images, VLT ISAAC infrared spectra, and long-slit optical Echelle spectra are used to investigate MyCn 18. Morpho-kinematic modelling was used to firmly constrain the structure and kinematics of the source. A timescale analysis was used to determine the kinematical age of the nebula and its main components. Results. A spectroscopic study of MyCn 18's central and offset region reveals the detailed make-up of its nebular composition. Molecular hydrogen, atomic helium, and Bracket gamma emission are detected from the central regions of MyCn 18. ISAAC spectra from a slit position along the narrow waist of the nebula demonstrate that the ionised gas resides closer to the centre of the nebula than ...

  2. Synthesis of sulfonamides via copper-catalyzed oxidative C-N bond cleavage of tertiary amines.

    Science.gov (United States)

    Ji, Jing; Liu, Zhengyi; Liu, Ping; Sun, Peipei

    2016-08-01

    A copper-catalyzed coupling reaction of sulfonyl chlorides with tertiary amines via the oxidative C-N bond cleavage of tertiary amines was developed. Sulfonamides were synthesized using this strategy in moderate to good yields. The reaction was applicable to various tertiary amines, as well as sulfonyl chlorides. PMID:27356858

  3. Tree species is the major factor explaining C:N ratios in European forest soils

    DEFF Research Database (Denmark)

    Cools, Nathalie; Vesterdal, Lars; De Vos, Bruno;

    2014-01-01

    mineral soil layers it was the humus type. Deposition and climatic variables were of minor importance at the European scale. Further analysis for eight main forest tree species individually, showed that the influence of environmental variables on C:N ratios was tree species dependent. For Aleppo pine...

  4. Sensitized chemiluminescence of 2-phenyl-4,5-di(2-furyl)-1H-imidazole/K₃Fe(CN)₆/propyl gallate system combining with solid-phase extraction for the determination of propyl gallate in edible oil.

    Science.gov (United States)

    Kang, Jing; Han, Lu; Chen, Zhonglin; Shen, Jimin; Nan, Jun; Zhang, Yihua

    2014-09-15

    In this paper, a novel chemiluminescence (CL) method has been developed for the determination of propyl gallate (PG). The proposed method was based on the enhancing effect of PG on the CL signal of 2-phenyl-4,5-di(2-furyl)-1H-imidazole (PDFI) and K3Fe(CN)6 reaction in an alkaline solution. Under the optimum conditions, the enhanced CL intensity was linearly related to the concentration of PG. The linear range of the calibration curve was 0.05-8 μg/mL, and the corresponding detection limit (3σ) was 0.036 μg/mL. The relative standard deviation for determining 1.0 μg/mL PG was 2.8% (n=11). The proposed method has been successfully applied to the determination of PG in edible oil. The edible oil samples were prepared by the solid-phase extraction (SPE) with a C18 column served as the stationary phase. Furthermore, the possible CL mechanism was also discussed briefly based on the photoluminescence (PL) and CL spectra.

  5. 数控专用主板设计%The design of NC special motherboard

    Institute of Scientific and Technical Information of China (English)

    张赞秋; 高岩; 罗迪; 杨松山; 苏升力

    2012-01-01

    Application of NC system based on the harsh environment, presents a special CNC design of the motherboard, the motherboard integrated design. For vibration, dust, strong electromagnetic interference and other issues put forward a solution, discussed a number of ways so as to meet NC System requirements.%根据数控系统应用的严酷环境,介绍了一种数控专用主板的设计.该主板一体化设计,并针对振动、粉尘、强烈电磁干扰等问题提出了一个解决方案,讨论了一些方法使之满足数控系统要求.

  6. An automatic 3D CAD model errors detection method of aircraft structural part for NC machining

    Directory of Open Access Journals (Sweden)

    Bo Huang

    2015-10-01

    Full Text Available Feature-based NC machining, which requires high quality of 3D CAD model, is widely used in machining aircraft structural part. However, there has been little research on how to automatically detect the CAD model errors. As a result, the user has to manually check the errors with great effort before NC programming. This paper proposes an automatic CAD model errors detection approach for aircraft structural part. First, the base faces are identified based on the reference directions corresponding to machining coordinate systems. Then, the CAD models are partitioned into multiple local regions based on the base faces. Finally, the CAD model error types are evaluated based on the heuristic rules. A prototype system based on CATIA has been developed to verify the effectiveness of the proposed approach.

  7. Research on cubic polynomial acceleration and deceleration control model for high speed NC machining

    Institute of Scientific and Technical Information of China (English)

    Hong-bin LENG; Yi-jie WU; Xiao-hong PAN

    2008-01-01

    To satisfy the need of high speed NC (numerical control) machining, an acceleration and deceleration (aec/dec) control model is proposed, and the speed curve is also constructed by the cubic polynomial. The proposed control model provides continuity of acceleration, which avoids the intense vibration in high speed NC machining. Based on the discrete characteristic of the data sampling interpolation, the acc/dec control discrete mathematical model is also set up and the discrete expression of the theoretical deceleration length is obtained furthermore. Aiming at the question of hardly predetermining the deceleration point in acc/dec control before interpolation, the adaptive acc/dec control algorithm is deduced from the expressions of the theoretical deceleration length. The experimental result proves that the acc/dec control model has the characteristic of easy implementation, stable movement and low impact. The model has been applied in multi-axes high speed micro fabrication machining successfully.

  8. Entanglement Entropy Renormalization for the NC scalar field coupled to classical BTZ geometry

    CERN Document Server

    Jurić, Tajron

    2016-01-01

    In this work, we consider a noncommutative (NC) massless scalar field coupled to the classical nonrotational BTZ geometry. In a manner of the theories where the gravity emerges from the underlying scalar field theory, we study the effective action and the entropy derived from this noncommutative model. In particular, the entropy is calculated by making use of the two different approaches, the brick wall method and the heat kernel method designed for spaces with conical singularity. We show that the UV divergent structures of the entropy, obtained through these two different methods, agree with each other. It is also shown that the same renormalization condition that removes the infinities from the effective action can also be used to renormalize the entanglement entropy for the same system. Besides, the interesting feature of the NC model considered here is that it allows an interpretation in terms of an equivalent system comprising of a commutative massive scalar field, but in a modified geometry; that of th...

  9. Resonant tunnelling in nc-Si/SiO2 multilayers at room temperature

    Institute of Scientific and Technical Information of China (English)

    Chen Deyuan

    2011-01-01

    Nc-Si/SiO2 multilayers were fabricated on silicon wafers in a plasma enhanced chemical vapour deposition system using in situ oxidation technology,followed by three-step thermal treatments.Carrier transportation at room temperature is characterized by current voltage measurement,and negative different conductances can be observed both under forward and negative biases,which is explained by resonant tunnelling.The resonant tunnelling peak voltage is related to the thicknesses of the nc-Si and SiO2 sublayers.And the resonant tunnelling peak voltage under negative bias is larger than that under forward bias.An energy band diagram and an equivalent circuit diagram were constructed to analyze and explain the above transportation process and properties.

  10. Aerobic oxidation of hydroxymethylfurfural and furfural by using heterogeneous Cox Oy -N@C catalysts.

    Science.gov (United States)

    Deng, Jin; Song, Hai-Jie; Cui, Min-Shu; Du, Yi-Ping; Fu, Yao

    2014-12-01

    2,5-Furandicarboxylic acid (FDCA) is considered to be a promising replacement for terephthalic acid since they share similar structures and properties. In contrast to FDCA, 2,5-furandicarboxylic acid methyl (FDCAM) has properties that allow it to be easily purified. In this work, we reported an oxidative esterification of 5-hydroxymethylfurfural (HMF) and furfural to prepare corresponding esters over Cox Oy -N@C catalysts using O2 as benign oxidant. High yield and selectivity of FDCAM and methyl 2-furoate were obtained under optimized conditions. Factors which influenced the product distribution were examined thoroughly. The Cox Oy -N@C catalysts were recycled five times and no significant loss of activity was detected. Characterization of the catalysts could explain such phenomena. Using XPS and TGA, we made a thorough investigation of the effects of ligand and pyrolysis temperature on catalyst activity.

  11. C/N ratio control and substrate addition for periphyton development jointly enhance freshwater prawn Macrobrachium rosenbergii production in ponds

    NARCIS (Netherlands)

    Asaduzzaman, M.; Wahab, M.A.; Verdegem, M.C.J.; Huque, S.; Salam, M.A.; Azim, M.E.

    2008-01-01

    The present research investigated the effect of carbon/nitrogen ratio (C/N ratio) control in ponds with or without substrate addition for periphyton development on production of giant freshwater prawn. C/N ratios of 10, 15 and 20 were investigated in 40 m¿ 2 ponds stocked with 2 prawn juveniles (5.0

  12. 77 FR 62510 - C.N. Brown Electricity, LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes...

    Science.gov (United States)

    2012-10-15

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission C.N. Brown Electricity, LLC; Supplemental Notice That Initial Market-Based... above-referenced proceeding, of C.N. Brown Electricity, LLC's application for market-based...

  13. Effects of Y2O3 on Thermal Shock of Al2O3/TiCN Composites

    Institute of Scientific and Technical Information of China (English)

    Qiu Guanming; Li Xikun; Xiu Zhimeng; Sun Xudong; Yan Changhao; Dai Shaojun

    2005-01-01

    Thermal shock resistance of Al2O3-TiCN(30%)-Y2O3(0.2%) composite was studied by hot pressing(HP) method at different temperatures. The study shows that thermal shock resistance of the material is determined by its microstructure and reinforced mechanism. According to SEM and calculation of thermal shock, the fractured surface of Al2O3-30%TiCN-0.2%Y2O3 composite is undulate. The residual strength of Al2O3-30%TiCN-0.2%Y2O3 is higher than Al2O3-30%TiCN at 200~800 ℃ after thermal shock. Cracks initiation resistance (R')and cracks propagation resistance (R″″)of Al2O3-30%TiCN-0.2%Y2O3 composite increases 12% and 5% respectively compared with that of Al2O3-30%TiCN. It matches with experimental results. The addition of Y2O3 forms YAG that inhibits crystal growth, and increases fracture stress, fracture toughness, cracks initiation resistance and cracks propagation resistance. Therefore, thermal shock resistance increases. The fracture work of Al2O3-30%TiCN and Al2O3-30%TiCN-0.2%Y2O3 composites are 132 and 148 J·m-2 respectively.

  14. Characterization of Thick and Thin Film SiCN for Pressure Sensing at High Temperatures

    Directory of Open Access Journals (Sweden)

    Rama B. Bhat

    2010-02-01

    Full Text Available Pressure measurement in high temperature environments is important in many applications to provide valuable information for performance studies. Information on pressure patterns is highly desirable for improving performance, condition monitoring and accurate prediction of the remaining life of systems that operate in extremely high temperature environments, such as gas turbine engines. A number of technologies have been recently investigated, however these technologies target specific applications and they are limited by the maximum operating temperature. Thick and thin films of SiCN can withstand high temperatures. SiCN is a polymer-derived ceramic with liquid phase polymer as its starting material. This provides the advantage that it can be molded to any shape. CERASET™ also yields itself for photolithography, with the addition of photo initiator 2, 2-Dimethoxy-2-phenyl-acetophenone (DMPA, thereby enabling photolithographical patterning of the pre-ceramic polymer using UV lithography. SiCN fabrication includes thermosetting, crosslinking and pyrolysis. The technology is still under investigation for stability and improved performance. This work presents the preparation of SiCN films to be used as the body of a sensor for pressure measurements in high temperature environments. The sensor employs the phenomenon of drag effect. The pressure sensor consists of a slender sensitive element and a thick blocking element. The dimensions and thickness of the films depend on the intended application of the sensors. Fabrication methods of SiCN ceramics both as thin (about 40–60 µm and thick (about 2–3 mm films for high temperature applications are discussed. In addition, the influence of thermosetting and annealing processes on mechanical properties is investigated.

  15. EDF-1 downregulates the CaM/Cn/NFAT signaling pathway during adipogenesis

    Energy Technology Data Exchange (ETDEWEB)

    López-Victorio, Carlos J.; Velez-delValle, Cristina; Beltrán-Langarica, Alicia [Department of Cell Biology, Center for Research and Advanced Studies-IPN, Apdo. Postal 14-740, México City 07000 (Mexico); Kuri-Harcuch, Walid, E-mail: walidkuri@gmail.com [Department of Cell Biology, Center for Research and Advanced Studies-IPN, Apdo. Postal 14-740, México City 07000 (Mexico)

    2013-03-01

    Highlights: ► EDF-1 participates early adipogenesis in 3T3F442A cells induced with Staurosporine/Dexamethasone. ► EDF-1 associates with CaM and Cn, most likely inactivating Cn. ► EDF-1/CaM complex seems to prevent NFATc1 activation by Cn. ► EDF-1 regulates the Cn/CaM/NFATc1 pathway during adipogenesis. ► EDF-1 may regulate the activation of Cn through a complex formation with CaM. - Abstract: The endothelial differentiation factor-1 (EDF-1) is a calmodulin binding protein that regulates calmodulin-dependent enzymes. In endothelial cells, this factor can form a protein complex with calmodulin. We analyzed the relationship between this factor and the members of calmodulin/calcineurin/nuclear factor of activated T-cells (NFAT) signaling pathway during adipogenesis of 3T3-F442A cells. We found that the expression of edf1 is upregulated during early adipogenesis, whereas that of calcineurin gene is lowered, suggesting that this pathway should be downregulated to allow for adipogenesis to occur. We also found that EDF-1 associates with calmodulin and calcineurin, most likely inactivating calcineurin. Our results showed that EDF-1 inactivates the calmodulin/calcineurin/NFAT pathway via sequestration of calmodulin, during early adipogenesis, and we propose a mechanism that negatively regulates the activation of calcineurin through a complex formation between EDF-1 and calmodulin. This finding raises the possibility that modulating this pathway might offer some alternatives to regulate adipose biology.

  16. EPR investigation of N@C$_{70}$ in polycrystalline C$_{70}$ and single wall carbon nanotubes

    OpenAIRE

    Dinse, Klaus-Peter; Corzilius, Björn; Jakes, Peter; Weiden, Norbert; Agarwal, Suman

    2008-01-01

    Abstract Using multi frequency electron paramagnetic resonance (EPR) it was possible to determine the inherent fine structure (FS) interaction of nitrogen encapsulated in a C$_{70}$ cage. Confinement of N@C$_{70}$ in single wall carbon nanotubes (SWNT) of rather wide diameter does not significantly influence this value. The transition between isotropic molecular tumbling and immobilisation was found to occur at about 170~K in both matrices, indicating that the hindra...

  17. Schwinger-Dyson and Large $N_{c}$ Loop Equation for Supersymmetric Yang-Mills Theory

    OpenAIRE

    Itoyama, H.; Takashino, H.

    1996-01-01

    We derive an infinite sequence of Schwinger-Dyson equations for $N=1$ supersymmetric Yang-Mills theory. The fundamental and the only variable employed is the Wilson-loop geometrically represented in $N=1$ superspace: it organizes an infinite number of supersymmetrizing insertions into the ordinary Wilson-loop as a single entity. In the large $N_{c}$ limit, our equation becomes a closed loop equation for the one-point function of the Wilson-loop average.

  18. $(\\alpha')^4$ Corrections in Holographic Large $N_c$ QCD and $\\pi - \\pi$ Scattering

    CERN Document Server

    Parthasarathy, R

    2007-01-01

    We calculate the ${\\alpha'}^4$ corrections to the non-Abelian DBI action on the $D8$-brane in the holographic dual of large $N_c$ QCD proposed by Sakai and Sugimoto. These give rise to higher derivative terms, in particular, four derivative contact terms for the pion field with the coupling uniquely determined. We calculate the pion-pion scattering amplitude near threshold. The results respecting unitarity are in agreement with the experimental curves.

  19. Resonance sum rules from large $N_C$ and partial wave dispersive analysis

    CERN Document Server

    Guo, Zhi-Hui

    2008-01-01

    Combining large $N_C$ techniques and partial wave dispersion theory to analyze the $\\pi\\pi$ scattering, without relying on any explicit resonance lagrangian, some interesting results are derived: (a) a general KSRF relation including the scalar meson contribution; (b) a new relation between resonance couplings, with which we have made an intensive analysis in several specific models; (c) low energy constants in chiral perturbation theory related with $\\pi\\pi$ scattering in terms of the mass and decay width of resonances.

  20. One step towards the fabrication of a nanoscale Si-nc based laser cavity

    International Nuclear Information System (INIS)

    In this paper, we report on the design of two major components of a laser architecture using Si-nc embedded in SiO2 as the optical gain medium and sub-wavelength periodic structures to form the resonant cavity. Dimensions of the structures have been matched to near-infrared wavelengths (∼850 nm) of the maximum photoluminescent emission where optical gain has been observed from Si-nc. Both the front (FM) and rear (RM) mirrors have been fabricated by the implantation of Si ions (50 keV, 2x1017 Si+/cm2) through a mask, in order to produce a Bragg reflector by optical index contrast between the implanted and the non-implanted zones. Two closely spaced Bragg reflectors are used in the FM structure to allow a narrow bandpass (partial transmission) centered at 850 nm. The implanted structures have been annealed to produce Si-nc and passivation. Scanning electron microscopy (SEM) images show that the design dimensions of the structure have been obtained. Characterization of the structures by laser excitation reveals an optical gap in both mirrors between 825 and 870 nm, as per the design parameters. A quality factor Q∼95 and a reflectivity R∼0.2 have been measured for the FM. These results support the concept that a complete Si-nc based laser cavity can be built to emit coherent light. - Research Highlights: → Ion implantation through a mask has been used to produce sub-wavelength periodic structures. → Bragg mirror has been tested as a part of Si-nanocrystals' laser architecture. → Numerical simulations have revealed an optical band gap as per the design parameters.

  1. Development of a community cancer education program: the Forsyth County, NC cervical cancer prevention project.

    OpenAIRE

    Michielutte, R; Dignan, M B; Wells, H B; Young, L. D.; Jackson, D S; Sharp, P C

    1989-01-01

    The authors outline the development and implementation of a public health education program for cervical cancer screening among black women in Forsyth County, NC. The educational program includes distributing electronic and printed information media messages, a program of direct education for women, and providing information on current issues in cervical screening to primary-care physicians. Program development was based on social marketing principles, the PRECEDE model, and the communication...

  2. STUDY ON NEW METHOD OF IDENTIFYING GEOMETRIC ERROR PARAMETERS FOR NC MACHINE TOOLS

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    The methods of identifying geometric error parameters for NC machine tools are introduced. According to analyzing and comparing the different methods, a new method-displacement method with 9 lines is developed based on the theories of the movement errors of multibody system (MBS). A lot of experiments are also made to obtain 21 terms geometric error parameters by using the error identification software based on the new method.

  3. 长虹NC-2机心通病检修

    Institute of Scientific and Technical Information of China (English)

    何金华

    2001-01-01

    @@ 长虹NC-2机心是九十年代初长虹公司和日本东芝公司联合研制并成功开发的机心.该机心已陪同用户走过了近十个春秋,也大批量陆续进入了故障期.在维修中,发现该机心有如下六种通病.

  4. ColorMath - A package for color summed calculations in SU(Nc)

    CERN Document Server

    Sjödahl, Malin

    2012-01-01

    A Mathematica package for color summed calculations in QCD (SU(Nc)) is presented. Color contractions of any color amplitude appearing in QCD may be performed, and the package uses a syntax which is very similar to how color structure is written on paper. It also supports the definition of color vectors and bases, and special functions such as scalar products are defined for such color tensors.

  5. Effects of Soil C/N Ratio on Apple Growth and Nitrogen Utilization,Residue and Loss

    Institute of Scientific and Technical Information of China (English)

    Shunfeng; GE; Yihua; REN; Ling; PENG; Haigang; XU; Mengmeng; JI; Shaochong; WEI; Yuanmao; JIANG

    2014-01-01

    Soil C /N ratio is an important influencing factor in soil nitrogen cycling. Two-year old apple trees( Borkh. cv. ‘Fuji’/Malus hupehensis) were used to understand the effect of soil C/N ratio [6. 52( CK),10,15,20,25,30,35 and 40]on apple growth and nitrogen utilization and loss by using15N trace technique. The results showed that,with the increasing of soil C/N ratio,apple shoot length and fresh weight increased at first,and then decreased; the higher apple shoot length and fresh weight appeared in C/N = 15,20 and 25 treatments,and there were no significant differences among these three treatments,but significantly higher than the other treatments. Statistical analysis revealed that there was significant difference in nitrogen utilization rate between the different treatments,the highest N utilization rate was occurred in soil C/N = 25 treatment which value was 22. 87%,and there was no significant difference between soil C/N = 25 and C/N = 20 treatments,but both the two treatments were significantly higher than the other treatments; Soil C/N = 40 had the lowest N utilization rate which value was 15. 43%,and this value was less than CK( 16. 65%). The proportion of plant absorption nitrogen from fertilizer was much higher when the value of soil C/N ratio in the range of 15- 25,but the percentage of plant absorption nitrogen from soil was much higher when the soil C/N ratio was too low( < 15) or high( < 25). Amount of residual nitrogen in soil increased gradually with the soil C/N ratio increasing,the amount of residual nitrogen in C/N = 40 treatment was 1. 32 times than that in CK. With the increasing of soil C/N ratio,fertilizer nitrogen loss decreased at first,and then increased,fertilizer nitrogen loss was the minimum in C/N = 25 treatments( 49. 87%) and the maximum were occurred in CK( 61. 54%). Therefore,regarding the apple growth and nitrogen balance situation,the value of soil C/N ratio in the range of 15- 25 would be favorable for apple growth and could

  6. Joint NC-ARQ and AMC for QoS-Guaranteed Mobile Multicast

    Directory of Open Access Journals (Sweden)

    Schwefel Hans-Peter

    2010-01-01

    Full Text Available In mobile multicast transmissions, the receiver with the worst instantaneous channel condition limits the transmission data rate under the desired Quality-of-Service (QoS constraints. If Automatic Repeat reQuest (ARQ schemes are applied, the selection of Adaptive Modulation and Coding (AMC mode will not necessarily be limited by the worst channel anymore, and improved spectral efficiency may be obtained in the efficiency-reliability tradeoff. In this paper, we first propose a Network-Coding-based ARQ (NC-ARQ scheme in its optimal form and suboptimal form (denoted as Opt-ARQ and SubOpt-ARQ, resp. to solve the scalability problem of applying ARQ in multicast. Then we propose two joint NC-ARQ-AMC schemes, namely, the Average PER-based AMC (AvgPER-AMC with Opt-ARQ and AvgPER-AMC with SubOpt-ARQ in a cross-layer design framework to maximize the average spectral efficiency per receiver under specific QoS constraints. The performance is analyzed under Rayleigh fading channels for different group sizes, and numerical results show that significant gains in spectral efficiency can be achieved with the proposed joint NC-ARQ-AMC schemes compared with the existing multicast ARQ and/or AMC schemes.

  7. Bayesian Reliability Modeling and Assessment Solution for NC Machine Tools under Small-sample Data

    Institute of Scientific and Technical Information of China (English)

    YANG Zhaojun; KAN Yingnan; CHEN Fei; XU Binbin; CHEN Chuanhai; YANG Chuangui

    2015-01-01

    Although Markov chain Monte Carlo(MCMC) algorithms are accurate, many factors may cause instability when they are utilized in reliability analysis; such instability makes these algorithms unsuitable for widespread engineering applications. Thus, a reliability modeling and assessment solution aimed at small-sample data of numerical control(NC) machine tools is proposed on the basis of Bayes theories. An expert-judgment process of fusing multi-source prior information is developed to obtain the Weibull parameters’ prior distributions and reduce the subjective bias of usual expert-judgment methods. The grid approximation method is applied to two-parameter Weibull distribution to derive the formulas for the parameters’ posterior distributions and solve the calculation difficulty of high-dimensional integration. The method is then applied to the real data of a type of NC machine tool to implement a reliability assessment and obtain the mean time between failures(MTBF). The relative error of the proposed method is 5.8020×10-4 compared with the MTBF obtained by the MCMC algorithm. This result indicates that the proposed method is as accurate as MCMC. The newly developed solution for reliability modeling and assessment of NC machine tools under small-sample data is easy, practical, and highly suitable for widespread application in the engineering field; in addition, the solution does not reduce accuracy.

  8. Density of Saturated Nuclear Matter at Large $N_{c}$ and Heavy Quark Mass Limits

    CERN Document Server

    Adhikari, Prabal; Datta, Ishaun

    2013-01-01

    We exhibit the existence of stable, saturated nuclear matter in the large $N_{c}$ and heavy quark mass limits of QCD. In this limit, baryons (with the same spin flavor structure) interact at leading order in $N_{c}$ via a repulsive interaction due to the Pauli exclusion principle and at subleading order in $1/N_c$ via the exchange of glueballs. Assuming that the lightest glueball is a scalar, which implies that the subleading baryon interaction is attractive, we find that nuclear matter saturates since the subleading attractive interaction is longer ranged than the leading order repulsive one. We find that the saturated matter is in the form of a crystal with either a face-centered cubic or a hexagonal-close-packed symmetry with baryon densities of $\\mathcal{O}((\\, \\tilde{\\alpha}_{s} m_q (\\ln (N_{c}m_{q}\\Lambda_{\\textrm{QCD}}^{-1}))^{-1})^3 )$. Remarkably, the leading order expression for the density of saturated nuclear matter is independent of the lighest glueball mass and scalar-glueball-baryon coupling in...

  9. l3a81nc.m77t - MGD77 data file for Geophysical data from field activity L-3A-81-NC in Central Coast, Northern California from 04/16/1981 to 04/26/1981

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-3A-81-NC in Central Coast, Northern...

  10. l382nc.m77t - MGD77 data file for Geophysical data from field activity L-3-82-NC in Off San Mateo County, Northern California from 02/27/1982 to 03/01/1982

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-3-82-NC in Off San Mateo County,...

  11. l477nc.m77t - MGD77 data file for Geophysical data from field activity L-4-77-NC in Northern California from 05/10/1977 to 05/21/1977

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-4-77-NC in Northern California from...

  12. l282nc.m77t - MGD77 data file for Geophysical data from field activity L-2-82-NC in Off San Mateo, Northern California from 02/07/1982 to 02/12/1982

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry, gravity, and magnetic data along with DGPS navigation data was collected as part of field activity L-2-82-NC in Off San Mateo, Northern...

  13. c180nc.m77t - MGD77 data file for Geophysical data from field activity C-1-80-NC in Monterey Bay, Northern California from 05/21/1980 to 05/22/1980

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Single-beam bathymetry data along with transit satellite navigation data was collected as part of field activity C-1-80-NC in Monterey Bay, Northern California from...

  14. ClEST cluster :Cl_singleton1538 [ClEST

    Lifescience Database Archive (English)

    Full Text Available Cl_singleton1538 dead (asp-glu-ala-asp) box polypeptide 5 Cimex lectularius nuclear...fw14079 1 similar to DEAD/H (Asp-Glu-Ala-Asp/His) box polypeptide 5 (RNA helicase 68kDa) [Xenopus laevis] NP_001079703 6.59566E-23 ...

  15. Electronic structure and catalytic aspects of [Ru(tpm)(bqdi)(Cl/H2O)]n, tpm = tris(1-pyrazolyl)methane and bqdi = o-benzoquinonediimine.

    Science.gov (United States)

    Agarwala, Hemlata; Ehret, Fabian; Chowdhury, Abhishek Dutta; Maji, Somnath; Mobin, Shaikh M; Kaim, Wolfgang; Lahiri, Goutam Kumar

    2013-03-14

    The diamagnetic complexes [Ru(tpm)(bqdi)(Cl)]ClO(4) ([1]ClO(4)) (tpm = tris(1-pyrazolyl)methane, bqdi = o-benzoquinonediimine) and [Ru(tpm)(bqdi)(H(2)O)](ClO(4))(2) ([2](ClO(4))(2)) have been synthesized. The valence state-sensitive bond distances of coordinated bqdi [C-N: 1.311(5)/1.322(5) Å in [1]ClO(4); 1.316(7)/1.314(7) Å in molecule A and 1.315(6)/1.299(7) Å in molecule B of [2](ClO(4))(2)] imply its fully oxidised quinonediimine (bqdi(0)) character. DFT calculations of 1(+) confirm the {Ru(II)-bqdi(0)} versus the antiferromagnetically coupled {Ru(III)-bqdi˙(-)} alternative. The (1)H NMR spectra of [1]ClO(4) in different solvents show variations in chemical shift positions of the NH (bqdi) and CH (tpm) proton resonances due to their different degrees of acidity in different solvents. In CH(3)CN/0.1 mol dm(-3) Et(4)NClO(4), [1]ClO(4) undergoes one reversible Ru(II)⇌ Ru(III) oxidation and two reductions, the reversible first electron uptake being bqdi based (bqdi(0)/bqdi˙(-)). The electrogenerated paramagnetic species {Ru(III)-bqdi(0)}(1(2+)) and {Ru(II)-Q˙(-)}(1) exhibit Ru(III)-type (1(2+): = 2.211/Δg = 0.580) and radical-type (1: g = 1.988) EPR signals, respectively, as is confirmed by calculated spin densities (Ru: 0.767 in 1(2+), bqdi: 0.857 in 1). The aqua complex [2](ClO(4))(2) exhibits two one-electron oxidations at pH = 7, suggesting the formation of {Ru(IV)[double bond, length as m-dash]O} species. The electronic spectral features of 1(n) (n = charge associated with the different redox states of the chloro complex: 2+, 1+, 0) in CH(3)CN and of 2(2+) in H(2)O have been interpreted based on the TD-DFT calculations. The application potential of the aqua complex 2(2+) as a pre-catalyst towards the epoxidation of olefins has been explored in the presence of the sacrificial oxidant PhI(OAc)(2) in CH(2)Cl(2) at 298 K, showing the desired selectivity with a wide variety of alkenes. DFT calculations based on styrene as the model substrate predict that

  16. Fabrication of nc-Si/SiO2 structure by thermal oxidation method and its luminescence characteristics

    Institute of Scientific and Technical Information of China (English)

    Haojie Zhang; Longzhi Lin; Shaoji Jiang

    2009-01-01

    Nano-crystalline silicon/silicon oxide (nc-Si/SiO2) structures have been prepared from amorphous silicon films on both silicon and quartz substrates by using electron-beam evaporation approach and annealing at temperatures about 600℃ in air. As a thermal oxidation procedure, the annealing treatment is not only a crystallization process but also an oxidation process. Scanning electron microscopy is employed to characterize the surface morphology of the nc-Si/SiO2 layers. Transmission electron microscopy study shows the sizes of nc-Si grains on the two different substrates. The nc-Si/SiO2 structures exhibit visible luminescence at room temperature as confirmed by photoluminescence spectroscopy. Comparing the pho- toluminescence spectra of different samples, our results agree with the quantum confinement-luminescence center model.

  17. Correlation between Light Emissions from Amorphous-Si:H/SiO2 and nc-Si/SiO2 Multilayers

    Institute of Scientific and Technical Information of China (English)

    MA Zhong-Yuan; HUANG Xin-Fan; CHEN Kun-Ji; FENG Duan; HAN Pei-Gao; LI Wei; CHEN De-Yuan; WEI De-Yuan; QIAN Bo; LI Wei; XU Jun; XU Ling

    2007-01-01

    We investigate the properties of light emission from amorphous-Si:H/SiO2 and nc-Si/SiO2 multilayers (MLs). The size dependence of light emission is well exhibited when the a-Si:H sublayer thickness is thinner than 4nm and the interface states are well passivated by hydrogen. For the nc-Si/SiO2 MLs, the oxygen modified interface states and nanocrystalline silicon play a predominant role in the properties of light emission. It is found that the light emission from nc-Si/SiO2 is in agreement with the model of interface state combining with quantum confinement when the size of nc-Si is smaller than 4 nm. The role of hydrogen and oxygen is discussed in detail.

  18. Generating SU(Nc) pure gauge lattice QCD configurations on GPUs with CUDA and OpenMP

    CERN Document Server

    Cardoso, Nuno

    2011-01-01

    The starting point of any lattice QCD computation is the generation of a Markov chain of gauge field configurations. Due to the large number of lattice links and due to the matrix multiplications, generating SU(Nc) lattice QCD configurations is a highly demanding computational task, requiring advanced computer parallel architectures such as clusters of several Central Processing Units (CPUs) or Graphics Processing Units (GPUs). In this paper we present and explore the performance of CUDA codes for NVIDIA GPUs to generate SU(Nc) lattice QCD pure gauge configurations. Our implementation in one GPU uses CUDA and in multiple GPUs uses OpenMP and CUDA. We present optimized CUDA codes SU(2), SU(3) and SU(4). We also show a generic SU(Nc) code for Nc$\\,\\geq 4$ and compare it with the optimized version of SU(4). Our codes are publicly available for free use by the lattice QCD community.

  19. Resonant Tunnelling and Storage of Electrons in Si Nanocrystals within a-SiNx/nc-Si/a-SiNx Structures

    Institute of Scientific and Technical Information of China (English)

    WANG Xiang; HUANG Jian; ZHANG Xian-Gao; DING Hong-Lin; YU Lin-Wei; HUANG Xin-Fan; LI Wei; XU Jun; CHEN Kun-Ji

    2008-01-01

    @@ The a-SiNx/nanocrystalline silicon (nc-Si)/a-SiNx sandwiched structures with asymmetric double-barrier are fabricated in a plasma enhanced chemical vapour deposition (PECVD) system on p-type Si substrates. The nc-Si layer in thickness 5nm is fabricated from a hydrogen-diluted silane gas by the layer-by-layer deposition technique. The thicknesses of tunnel and control SiNx layers are 3nm and 20nm,respectively. Frequency-dependent capacitance spectroscopy is used to study the electron tunnelling and the storage in the sandwiched structures.Distinct frequency-dependent capacitance peaks due to electrons tunnelling into the nc-Si dots and capacitance-voltage (C- V) hysteresis characteristic due to electrons storage in the nc-Si dots are observed with the same sample.

  20. Measurement of the absorption cross sections of SiCl_4, SiCl_3, SiCl_2 and Cl at H Lyman-α wavelength

    OpenAIRE

    Mével, R.; Catoire, L.; M. Fikri; Roth, P.

    2013-01-01

    Atomic resonance absorption spectroscopy coupled with a shock tube is a powerful technique for studying high temperature dynamics of reactive systems. Presently, high temperature pyrolysis of SiCl_4–Ar mixtures has been studied behind reflected shock waves. Using time-resolved absorption profiles at 121.6 nm and a detailed reaction model, the absorption cross sections of SiCl_4, SiCl_3, SiCl_2 and Cl have been measured. Results agree well with available data for SiCl_4 and constitute, to our ...

  1. The theta^+ baryon in soliton models: large Nc QCD and the validity of rigid-rotor quantization

    OpenAIRE

    Cohen, Thomas D.

    2003-01-01

    A light collective theta+ baryon state (with strangeness +1) was predicted via rigid-rotor collective quantization of SU(3) chiral soliton models. This paper explores the validity of this treatment. A number of rather general analyses suggest that predictions of exotic baryon properties based on this approximation do not follow from large Nc QCD. These include an analysis of the baryon's width, a comparison of the predictions with general large Nc consistency conditions of the Gervais-Sakita-...

  2. Low temperature p+ nc-Si:H window layers for large area thin-film solar cells

    OpenAIRE

    Tse, Wing Fai Lydia

    2007-01-01

    Hydrogenated nanocrystalline silicon (nc-Si:H) has attracted attention recently over amorphous silicon (a-Si:H) for use in thin-film solar cell applications primarily due to its higher stability and light absorbing capacity. In addition, there is increasing interest in device fabrication on low-cost, light weight and flexible substrates where optimizing deposition conditions of nc-Si:H thin films at low substrate temperatures (< 200 °C) poses challenges. In such solar cells, the thin boron...

  3. clOpenCL - supporting distributed heterogeneous computing in HPC clusters

    OpenAIRE

    Alves, Albano; Rufino, José; Pina, António; Santos, Luis Paulo

    2013-01-01

    Clusters that combine heterogeneous compute device architectures, coupled with novel programming models, have created a true alternative to traditional (homogeneous) cluster computing, allowing to leverage the performance of parallel applications. In this paper we introduce clOpenCL, a platform that supports the simple deployment and efficient running of OpenCL-based parallel applications that may span several cluster nodes, expanding the original single-node OpenCL model. clOpenCL is deploye...

  4. Implementation of Real-Time Machining Process Control Based on Fuzzy Logic in a New STEP-NC Compatible System

    Directory of Open Access Journals (Sweden)

    Po Hu

    2016-01-01

    Full Text Available Implementing real-time machining process control at shop floor has great significance on raising the efficiency and quality of product manufacturing. A framework and implementation methods of real-time machining process control based on STEP-NC are presented in this paper. Data model compatible with ISO 14649 standard is built to transfer high-level real-time machining process control information between CAPP systems and CNC systems, in which EXPRESS language is used to define new STEP-NC entities. Methods for implementing real-time machining process control at shop floor are studied and realized on an open STEP-NC controller, which is developed using object-oriented, multithread, and shared memory technologies conjunctively. Cutting force at specific direction of machining feature in side mill is chosen to be controlled object, and a fuzzy control algorithm with self-adjusting factor is designed and embedded in the software CNC kernel of STEP-NC controller. Experiments are carried out to verify the proposed framework, STEP-NC data model, and implementation methods for real-time machining process control. The results of experiments prove that real-time machining process control tasks can be interpreted and executed correctly by the STEP-NC controller at shop floor, in which actual cutting force is kept around ideal value, whether axial cutting depth changes suddenly or continuously.

  5. 75 FR 59071 - Airworthiness Directives; Bombardier, Inc. Model CL-600-2B16 (CL-604 Variants (Including CL-605...

    Science.gov (United States)

    2010-09-27

    ... in the Federal Register on June 2, 2010 (75 FR 30740). That NPRM proposed to correct an unsafe...'' under the DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and 3. Will not have.... Model CL-600-2B16 (CL- 604 Variants (Including CL-605 Marketing Variant)) Airplanes AGENCY:...

  6. Structure and function of collectin liver 1 (CL-L1) and collectin 11 (CL-11, CL-K1)

    DEFF Research Database (Denmark)

    Selman, Lana; Hansen, Soren

    2012-01-01

    to l-fucose and d-mannose, whereas CL-L1 shows preference for d-mannose, d-fucose, N-acetylglucosamine, and surprisingly also d-galactose. CL-11 binds to various microorganisms including Escherichia coli, Candida albicans and Influenza A virus. Polymorphisms in the CL-11 gene (COLEC11) leading...

  7. Nitrogen Contents on Tribological Properties of Magnetron Sputtered SiCN Coatings

    Institute of Scientific and Technical Information of China (English)

    TIETUN SUN; Y.Q. FU; J. WEI; H. J. DU

    2004-01-01

    Silicon carbonitride (SiCN) coatings were deposited on silicon and tungsten carbide substrates by co-sputtering silicon and carbon in argon and nitrogen mixture atmosphere using magnetron-sputtering system. The effect of the N2concentration, RF substrate bias voltage and target current on film deposition rate, roughness, adhesion, mechanical and tribological properties of coatings were investigated. The deposition rate was found to increase with the increasing nitrogen concentration. X-ray photoelectron spectroscopy analysis showed that high nitrogen concentration in the nitrogen-argon gas mixture enhanced the incorporation of C and N but reduced the incorporation of Si. SiCN coatings have good tribological properties at a N2 concentration of approximately 60%.

  8. Improvement of the cold neutron beam line (CN-3) in KUR for neutron optical device development

    Science.gov (United States)

    Kawabata, Yuji; Hino, Masahiro; Tasaki, Seiji; Ebisawa, Toru; Maruyama, Ryuji; Horie, Takashi

    2002-01-01

    The cold neutron beam line CN-3 in Kyoto University Reactor (KUR) is being renewed for dedicating to the development of neutron optical devices. CN-3 has a supermirror guide tube with the cross-section of 20 mm (width)× 90 mm (height), and the wide-band neutron spectrum is available. New beam lines are prepared for both time-of-flight (TOF) and monochromatic experiments including a neutron reflectivity measurement. It has a polarized neutron option with a very low magnetic field to cope with polarized neutron devices. In particular, the TOF mode will be used for developing devices, which are suitable for pulsed neutron sources. Cold neutron radiography is also available within a space of 1 m×0.8 m. A neutron imaging plate system is prepared as the neutron imaging detection.

  9. Nitrogen Contents on Tribological Properties of Magnetron Sputtered SiCN Coatings

    Institute of Scientific and Technical Information of China (English)

    TIETUNSUN; Y.Q.FU; J.WEI; H.J.DU

    2004-01-01

    Silicon carbonitride (SiCN) coatings were deposited on silicon and tungsten carbide substrates by co-sputtering silicon and carbon in argon and nitrogen mixture atmosphere using magnetron-sputtering system. The effect of the N2 concentration, RF substrate bias voltage and target current on film deposition rate, roughness, adhesion, mechanical and tribological properties of coatings were investigated. The deposition rate was found to increase with the increasing nitrogen concentration. X-ray photoelectron spectroscopy analysis showed that high nitrogen concentration in the nitrogen-argon gas mixture enhanced the incorporation of C and N but reduced the incorporation of Si. SiCN coatings have good tribological properties at a N2 concentration of approximately 60%.

  10. Structure and property relationships of amorphous CN sub x a joint experimental and theoretical study

    CERN Document Server

    Santos, M C D

    2000-01-01

    Amorphous CN sub x and CN sub x :H have been prepared by the ion beam assisted deposition technique. Samples were characterized through X-ray and UV photoemission, IR absorption and Raman spectroscopies. These spectra have been interpreted with the aid of quantum chemical calculations based upon the Hartree-Fock theory on several molecular models. The understanding of the electronic and structural properties of the amorphous alloy as a function of nitrogen content could help in the task of synthesizing the metastable silicon-nitride like-phase beta-C sub 3 N sub 4 , a solid which has been predicted to be as hard as diamond. The physical picture emerging from the present study helps to clarify the difficulties in obtaining the crystalline phase of the material, suggesting new experimental directions for syntheses.

  11. Multiwavelength observations of a giant flare on CN Leonis III. Temporal evolution of coronal properties

    OpenAIRE

    Liefke, Carolin; Fuhrmeister, Birgit; Schmitt, Juergen H. M. M.

    2010-01-01

    Stellar flares affect all atmospheric layers from the photosphere over chromosphere and transition region up into the corona. Simultaneous observations in different spectral bands allow to obtain a comprehensive picture of the environmental conditions and the physical processes going on during different phases of the flare. We investigate the properties of the coronal plasma during a giant flare on the active M dwarf CN Leo observed simultaneously with the UVES spectrograph at the VLT and XMM...

  12. Photoluminescence of CN Cones%锥形碳氮结构的发光性能

    Institute of Scientific and Technical Information of China (English)

    王必本; 陈玉安; 陈轩

    2011-01-01

    利用偏压增强化学气相沉积系统,以CH4、H2和NH3为反应气体,分别在沉积有钛膜和碳膜的Si衬底上制备锥形碳结构,并用扫描电子显微镜、X射线能谱仪和显微Raman光谱仪对其进行表征,结果表明所制备的样品为锥形碳氮结构.用显微Raman光谱仪对锥形碳氮结构在室温下的发光性能进行了研究,发光谱显示出中心在621,643,726 nm的发光带.根据碳氮薄膜的发光机理对锥形碳氮结构的发光性能进行了分析.%Carbon cones were grown on silicon substrates by bias-enhanced chemical vapor deposition using methane, hydrogen and ammonia as the reaction gases, and the silicon substrates were pre-deposited with titanium and carbon films, respectively. The cones were characterized by scanning electron microscopy, energy dispersive X-ray and micro-Raman spectroscopy. The results indicate that the cones are CN structure. The photoluminescence of CN cones was investigated by micro-Raman spectroscopy at room temperature and the photoluminescence spectrum showed three emission bands centered at about 621,643,726 nm, respectively. According to the photoluminescence mechanism of CN films, the photoluminescence of CN cones was analyzed.

  13. Knowledge Creation by SMEs on Communities of Practice on Alibaba.com.cn

    OpenAIRE

    Cui, Ting Ting

    2007-01-01

    Knowledge creation means gaining a substantial momentum due to its direct relation to the company’s core competency and competitive advantage. The current thesis investigated a new phenomenon, which is the knowledge creation through knowledge sharing and learning by SMEs in Communities of Practice on Business to Business marketplace, Alibaba.com.cn. The objective was to research whether intangible assets were created for producing competitive advantage. This thesis suggests a bett...

  14. Identification of the c(10×6)-CN/Cu(001) surface structure

    KAUST Repository

    Shuttleworth, I.G.

    2014-12-01

    © 2014 Elsevier B.V. All rights reserved. A systematic survey of all possible c(10 x 6)-CN/Cu(0 0 1) structures has been performed using density functional theory (DFT). A group of four preferred structures is presented with one of the structures identified as optimal. An analysis of the bonding within the optimal structure has shown that a significant localisation of the surface Cu 4s bonds occurs in the saturated system.

  15. EXTENDED CES(A)RO OPERATORS ON THE BLOCH SPACE IN THE UNIT BALL OF Cn

    Institute of Scientific and Technical Information of China (English)

    胡璋剑

    2003-01-01

    The paper defines an extended Cesàro operator Tg with holomorphic symbolg in the unit ball B of Cn asWhere g(z)= ∑j=1∑n zj g/ zj is the radial derivative of g. In this paper, the author characterizes g for which Tg is bounded (or compact) on the Bloch spaceB and the little Blochspace B0.

  16. Carnosine and Homocarnosine Degradation Mechanisms by the Human Carnosinase Enzyme CN1: Insights from Multiscale Simulations.

    Science.gov (United States)

    Pavlin, Matic; Rossetti, Giulia; De Vivo, Marco; Carloni, Paolo

    2016-05-17

    The endogenous dipeptide l-carnosine, and its derivative homocarnosine, prevent and reduce several pathologies like amytrophic lateral sclerosis (ALS), Alzheimer's disease, and Parkinson's disease. Their beneficial action is severely hampered because of the hydrolysis by carnosinase enzymes, in particular the human carnosinase, hCN1. This belongs to the metallopeptidase M20 family, where a cocatalytic active site is formed by two Zn(2+) ions, bridged by a hydroxide anion. The protein may exist as a monomer and as a dimer in vivo. Here we used hybrid quantum mechanics/molecular mechanics simulations based on the dimeric apoenzyme's structural information to predict the Michaelis complexes with l-carnosine and its derivative homocarnosine. On the basis of our calculations, we suggest that (i) l-carnosine degradation occurs through a nucleophilic attack of a Zn(2+)-coordinated bridging moiety for both monomer and dimer. This mechanistic hypothesis for hCN1 catalysis differs from previous proposals, while it is in agreement with available experimental data. (ii) The experimentally measured higher affinity of homocarnosine for the enzyme relative to l-carnosine might be explained, at least in part, by more extensive interactions inside the monomeric and dimeric hCN1's active site. (iii) Hydrogen bonds at the binding site, present in the dimer but absent in the monomer, might play a role in the experimentally observed higher activity of the dimeric form. Investigations of the enzymatic reaction are required to establish or disprove this hypothesis. Our results may serve as a basis for the design of potent hCN1 inhibitors. PMID:27105448

  17. Effect of Potassium and C/N Ratios on Conversion of NH+4 in Soils

    Institute of Scientific and Technical Information of China (English)

    TANG Yan; WANG Xiao-Zhi; ZHAO Hai-Tao; FENG Ke

    2008-01-01

    Two soils, one consisting of 1:1 clay minerals at pH 4.5 and the other containing 2:1 clay minerals at pH 7.0, were used to estimate the conversion of added NH+4 under different C/N ratios (glucose as the C source) and the addition of potassium. Under lower C/N ratios (0:1 and 5:1), a large part of the added NH+4 in the acid soil was held in the forms of either exchangeable or water soluble NH+4 for a relatively long time and under higher C/N ratio (50:1), a large amount of the added NH+4 was directly immobilized by microorganisms. In the second soil containing appreciable 2:1 type clay minerals a large part of the added NH+4 at first quickly entered the interlayer of the minerals under both lower and higher C/N ratios. In second condition, however, owing to microbial assimilation stimulated by glucose the newly fixed NH+4 could be completely released in further incubation because of a large concentration gradicnt between external NH+4 and fixed NH+4 in the mineral interlayer caused by heterotrophic microorganisms, which imply the fixed NH+4 to be available to plants. The results also showed that if a large amount of K+ with carbon source together was added to soil, the higher K+ concentration of soil solution could impede the release of fixed NH+4, even if there was a lot of carbon source.

  18. Vector-Valued Dirichlet-Type Functions on the Unit Ball of Cn

    Institute of Scientific and Technical Information of China (English)

    LI Ying-kui; LIU Pei-de

    2005-01-01

    The vector-valued Dirichlet-type spaces on the unit ball of Cn is introduced. We discuss the pointwise multipliers of Dirichlet-type spaces. Sufficient conditions of the pointwise multipliers of D2μ for 0≤μ<2 if n=1 or D2μ,q for 0<μ<1 if n≥2 are given. Finally, Rademacher p-type space is characterized by vector-valued sequence spaces.

  19. Höchstfeste nichtrostende austenitische CrMn-Stähle mit (C+N)

    OpenAIRE

    Riedner, Sascha

    2010-01-01

    Nichtrostende austenitische Stähle erzielen in der Regel nur geringe Festigkeiten. Die effektivste Methode zur Festigkeitssteigerung bietet das Legieren mit interstitiellen Atomen. Das gemeinsame Legieren mit (C+N) resultiert in offen erschmelzbaren, hochfesten nichtrostenden Austentiten. Die neuentwickelten Stähle weisen eine sehr hohe Austenitstabilität, Festigkeit, Kaltverfestigung, Zähigkeit und Duktilität auf. Auch unter zyklischer Beanspruchung kann die hohe Festigkeit genut...

  20. Beyond the SCS-CN method: A theoretical framework for spatially lumped rainfall-runoff response

    Science.gov (United States)

    Bartlett, M. S.; Parolari, A. J.; McDonnell, J. J.; Porporato, A.

    2016-06-01

    Since its introduction in 1954, the Soil Conservation Service curve number (SCS-CN) method has become the standard tool, in practice, for estimating an event-based rainfall-runoff response. However, because of its empirical origins, the SCS-CN method is restricted to certain geographic regions and land use types. Moreover, it does not describe the spatial variability of runoff. To move beyond these limitations, we present a new theoretical framework for spatially lumped, event-based rainfall-runoff modeling. In this framework, we describe the spatially lumped runoff model as a point description of runoff that is upscaled to a watershed area based on probability distributions that are representative of watershed heterogeneities. The framework accommodates different runoff concepts and distributions of heterogeneities, and in doing so, it provides an implicit spatial description of runoff variability. Heterogeneity in storage capacity and soil moisture are the basis for upscaling a point runoff response and linking ecohydrological processes to runoff modeling. For the framework, we consider two different runoff responses for fractions of the watershed area: "prethreshold" and "threshold-excess" runoff. These occur before and after infiltration exceeds a storage capacity threshold. Our application of the framework results in a new model (called SCS-CNx) that extends the SCS-CN method with the prethreshold and threshold-excess runoff mechanisms and an implicit spatial description of runoff. We show proof of concept in four forested watersheds and further that the resulting model may better represent geographic regions and site types that previously have been beyond the scope of the traditional SCS-CN method.

  1. Pseudopotential Density-Functional Calculations for Structures of Small Carbon Clusters CN (N = 2~8)

    Institute of Scientific and Technical Information of China (English)

    BAI Yu-Lin; CHEN Xiang-Rong; YANG Xiang-Dong; LU Peng-Fei

    2004-01-01

    We introduce a first-principles density-functional theory, i.e. the finite-difference pseudopotential densityfunctional theory in real space and the Langevin molecular dynamics annealing technique, to the descriptions of structures and some properties of small carbon clusters (CN, N = 2 ~ 8). It is shown that the odd-numbered clusters have linear structures and most of the even-numbered clusters prefer cyclic structures.

  2. Oak Ridge CN Van de Graaff Facility for heavy ion radiation damage studies

    International Nuclear Information System (INIS)

    The Oak Ridge CN Van de Graaff accelerator was set up to deliver heavy beams useful for radiation damage studies. Beams of well defined energy, isotope, and charge state can be brought on target with an intensity in excess of 1 particle microamp, uniformly spread over a square centimeter area. Methods were devised to measure both the on-line intensity and uniformity of the heavy ion beam

  3. Quality Management System according to the family of Cuban Standards ISO 9000 CN Total Quality approach.

    OpenAIRE

    Leonel C. Alfaro Pérez; Reina A. Carballé Piñón

    2009-01-01

    In this article we develop some considerations and suggestions for organizations in Cuba who want to design and implement systems with Quality Management Total Quality approach to the family of Cuban Standards ISO 9000 CN. It makes a comparative analysis between what is a System of Quality Management, Total Quality and the European model of quality management, detailing the similarities and differences, which allow us to understand how systems can be designed and managed focuses on Total Qual...

  4. Syntheses, Vibrational Spectroscopy, and Crystal Structure Determination from X-Ray Powder Diffraction Data of Alkaline Earth Dicyanamides M[N(CN)

    Energy Technology Data Exchange (ETDEWEB)

    Juergens, Barbara; Irran, Elisabeth; Schnick, Wolfgang

    2001-03-01

    The alkaline earth dicyanamides Mg[N(CN){sub 2}]{sub 2}, Ca[N(CN){sub 2}]{sub 2}, Sr[N(CN){sub 2}]{sub 2}, and Ba[N(CN){sub 2}]{sub 2} were synthesized by ion exchange using Na[N(CN){sub 2}] and the respective nitrates or bromides as starting materials. The crystal structures were determined from X-ray powder diffractometry: Mg[N(CN){sub 2}]{sub 2}, Pnnm, Z=2, a=617.14(3), b=716.97(3), and c=740.35(5) pm; Ca[N(CN){sub 2}]{sub 2} and Sr[N(CN){sub 2}]{sub 2}, C2/c, Z=4; Ca[N(CN){sub 2}]{sub 2}, a=1244.55(3), b=607.97(1), and c=789.81(1) pm, {beta}=98.864(2){degree}; Sr[N(CN){sub 2}]{sub 2}, a=1279.63(2), b=624.756(8), and c=817.56(1) pm, {beta}=99.787(1){degree}; Ba[N(CN){sub 2}]{sub 2}, Pnma, Z=4, a=1368.68(7), b=429.07(7), and c=1226.26(2) pm. The dicyanamides consist of the respective alkaline earth cations and bent planar [N(CN){sub 2}]{sup -} ions. The structural features were correlated with vibrational spectroscopic data. The thermal behavior was studied by thermoanalytical experiments.

  5. Application of quantitative PCR method in detection of Lymphocystis disease virus China (LCDV-cn) in Japanese flounder (Paralichthys olivaceus)

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Lymphocystis disease causes serious economic losses in the fish farming industry. The causative agent of the disease is Lymphocystis disease virus China (LCDV-cn), which has a wide range of hosts. Based on competitive quantitative PCR technology, we established a method to quantify the LCDV-cn in tissue. Results demonstrate that the average amount of LCDV-cn in the peripheral blood of infected flounder with evident tumors is about 106virions/ml while the average amount in those flounder with no evident tumor but cultured with the flounder with evident tumor is about 104virions/ml. No virus was found in the negative samples of flounder.

  6. Friction and wear of TiCN coatings deposited by filtered arc

    Energy Technology Data Exchange (ETDEWEB)

    Huang, S.W.; Ng, K.; Samandi, M. [Wollongong Univ. NSW (Australia). Department of Materials Engineering

    1998-06-01

    A series of macroparticle-free TiN, TiCN and TiC coatings were deposited on 316 austenitic stainless steel using a titanium target in a filtered arc deposition system and reactive mixtures of CH4 and N2 gases. The microhardness of the coatings were measured by using an Ultra Microhardness Indentation System (UMIS-2000). The wear and friction of the coatings were assessed under controlled test conditions in a pin-on-disc tribometer. The results show a significant increase in microhardness and wear resistance as the CH4 :N2 gas flow rate ratio is increased. At lower load (14N), all coatings exhibited low friction and wear. At higher load (25N), the higher carbon content TiCN and TiC coatings showed a much lower friction and wear compared to TiN and low carbon TiCN. The topographical examination of coatings and worn surfaces established that the self-lubricating effect of the carbonaceous particles condensed from the plasma during the deposition was primarily responsible for the low friction and wear regime. (authors). Extended abstract. 6 refs., 1 tab., 2 figs.

  7. Reactive synthesis Ti(CN)-based metal ceramic coating by electric-spark deposition

    Institute of Scientific and Technical Information of China (English)

    Hao Jianjun; Ma Luping; Li Jianchang; Zhao Jianguo; Ma Yuejin

    2009-01-01

    Electric-spark deposition (ESD) was adopted for depositing a Ti(CN)-based ceramic coating on the TC4 titanium alloy substrate using a laboratory-developed electric-spark deposition system, a nitrogen-sealed atmosphere and graphite electrode. The surface morphology, microstructure, interfacial behavior between the coatings and substrate, phase and element composition of the coatings were investigated by scanning electron microscope(SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Auger electron spectroscopy (AES). Microhardness profile was measured with a Vickers microhardness tester. The results show that metallurgical bond between the coating and substrate is realized and the phase of coatings are made up of Ti(CN ) spherocrystal and dendritic crystal, TiV and C. Ti(CN) ceramic particles, which is in-situ synthesized by the reaction among titanium from the substrate, carbon from the graphite electrode and nitrogen from the shielding nitrogen gas, is about 600nm and distributes dispersively among the coatings. Microhardness profile falls off with the coatings thickness increasing and the highest microhardness values of the superficial coating could be up to 1496HV, which is six times more than that of the substrate.

  8. Crystallization and preliminary crystallographic study of carnosinase CN2 from mice

    Energy Technology Data Exchange (ETDEWEB)

    Yamashita, Tetsuo; Unno, Hideaki; Ujita, Sayuri; Otani, Hiroto; Okumura, Nobuaki; Hashida-Okumura, Akiko; Nagai, Katsuya; Kusunoki, Masami, E-mail: kusunoki@protein.osaka-u.ac.jp [Institute for Protein Research, Osaka University, 3-2 Yamada-oka, Suita, Osaka 565-0871 (Japan)

    2006-10-01

    Mouse carnosinase was crystallized in complex with Zn{sup 2+} or Mn{sup 2+} and the complexes are undergoing structure determination by the MAD method. Mammalian tissues contain several histidine-containing dipeptides, of which l-carnosine is the best characterized and is found in various tissues including the brain and skeletal muscles. However, the mechanism for its biosynthesis and degradation have not yet been fully elucidated. Crystallographic study of carnosinase CN2 from mouse has been undertaken in order to understand its enzymatic mechanism from a structural viewpoint. CN2 was crystallized by the hanging-drop vapour-diffusion technique using PEG 3350 as a precipitant. Crystals were obtained in complex with either Mn{sup 2+} or Zn{sup 2+}. Both crystals of CN2 belong to the monoclinic space group P2{sub 1} and have almost identical unit-cell parameters (a = 54.41, b = 199.77, c = 55.49 Å, β = 118.52° for the Zn{sup 2+} complex crystals). Diffraction data were collected to 1.7 and 2.3 Å for Zn{sup 2+} and Mn{sup 2+} complex crystals, respectively, using synchrotron radiation. Structure determination is ongoing using the multiple-wavelength anomalous diffraction (MAD) method.

  9. A photometric study of the field RR Lyrae stars AW Dra, AQ Lyr and CN Lyr

    CERN Document Server

    Castellani, V; Piersimoni, A M; Ripepi, V

    1997-01-01

    We present CCD lightcurves for the three field RR Lyrae AQ Lyr, CN Lyr and AW Dra observed at the Teramo TNT telescope. Stellar temperatures have been derived from the observed mean colors, allowing a comparison with recent theoretical predictions on RR Lyrae lightcurves. As for the two metal rich pulsators in the sample we suggest that CN Lyr has been possibly misclassified, being a c-type pulsator. This gives a warning against the possible contamination with first overtone (FO) pulsators of observational samples of field ab type stars. On the other hand, if CN Lyr belongs to the low amplitude, b-type fundamental pulsators, it shows a lightcurve with a slow risetime not jet predicted by theory. AQ Lyrae appears as a metal rich ab type pulsator, with the expected luminosity but with amplitude lower than predicted by theory. Finally, we find that AW Dra behaves as a metal poor fundamental (F) pulsator, crossing the instability strip well above the corresponding Zero Age Horizontal Branch (ZAHB) luminosity leve...

  10. Time-dependent analysis of 8 days of CN spatial profiles in comet P/Halley

    Science.gov (United States)

    Combi, Michael; Huang, Bormin; Cochran, Anita; Fink, Uwe; Schulz, Rita

    1994-01-01

    CN profiles in comet P/Halley were constructed from observations taken at three observatories during an 8 day period in April 1986. These data provide a time series of CN spatial profiles spanning just over one 7.37 day period from 1986 April 7 to April 15 and sample distances from the nucleus from just over 10(exp 3) km to 10(exp 6) km. The effect of the 7.37 day periodic variation on the CN distribution in P/Halley has been examined by using the time-dependent model applied earlier to a subset of the data. Because of the large spatial scale of the data on April 7, 8, and 9 (approx. 10(exp 6) km), and the corresponding transport time in the coma, information present in the spatial profiles regarding the gas production rate actually covers nearly two full periods. These spatially extended profiles clearly show the wavy structures outside 10(exp 5) km. Such structures were predicted in a previous analysis (Combi & Fink 1993) that was based solely on the photometric light curve and on profiles which only extended to distances less than 10(exp 5) km. We are now able to reproduce the highly variable Halley correction for the variation in gas production rate.

  11. The measurements of laser beam transmission through exposed/etched CR-39 and CN-85 detectors

    Energy Technology Data Exchange (ETDEWEB)

    Salman, Thaer M.; Subber, Abdul R.H. [Department of Physics, College of Education, University of Basrah, Basrah (Iraq); AL-Ahmad, Alaa Y., E-mail: alaa_ta2005@yahoo.com [Department of Physics, College of Education, University of Basrah, Basrah (Iraq)

    2012-12-01

    In the present trackology work, CR-39 and CN-85, solid state nuclear track detectors (SSNTDs) were irradiated with alpha particles and gamma rays for different irradiation times. These detector foils were chemically etched by NaOH solution with specified normality. The intensity of transmitted laser light ({lambda}=650 nm) through irradiated and etched detectors was measured using a photodiode. The method appeared as a good technique for dose measuring but it is extremely dependent on the etching time, the type of incident particles and the type of the detector. It is found that the response of CN-85 detector looks faster and better than CR-39 detector. -- Highlights: Black-Right-Pointing-Pointer This work is on investigation of the laser beam transmission through etched SSNTDs. Black-Right-Pointing-Pointer Samples of SSNTDs were irradiated with different doses from alpha or gamma rays. Black-Right-Pointing-Pointer It is a good technique for relative dose reading. Black-Right-Pointing-Pointer Response of CN-85 is measured to be faster than CR-39 detector.

  12. L'émergence de formes nouvelles dans le parler ncàm (bassar) moderne

    OpenAIRE

    ADOUNA, Gbandi

    2014-01-01

    International audience Le ncàm fait partie des langues qui ont le plus conservé le système des classes nominales. Mais de nos jours, l'on assiste à l'émergence de certaines formes, en contradiction avec le système classique, notamment dans le processus de relativisation. Si, au niveau classique, à une classe nominale donnée correspond un relateur spécifique, de nos jours, la tendance semble quelque peu inversée, et l'on tend vers une simplification des formes (au lieu d'un relateur spécial...

  13. Comparison of the Gottfried and Adler sum rules within the large-Nc expansion

    OpenAIRE

    Broadhurst, D. J.; Kataev, A. L.; Maxwell, C. J.

    2004-01-01

    The Adler sum rule for deep inelastic neutrino scattering measures the isospin of the nucleon and is hence exact. By contrast, the corresponding Gottfried sum rule for charged lepton scattering was based merely on a valence picture and is modified both by perturbative and non-perturbative effects. Noting that the known perturbative corrections to two-loop order are suppressed by a factor 1/N_c^2, relative to those for higher moments, we propose that this suppression persists at higher orders ...

  14. A finite element analysis of an SSC dipole magnet (NC-9 cross-section)

    International Nuclear Information System (INIS)

    Finite element methods are used to calculate the mechanical behavior of an SSC superconducting dipole magnet under different loading conditions. A two-dimensional model of the NC-9 design (aluminum collars) has been developed and used to calculate the transverse deflections and stresses in the dipole after assembly of the magnet, cooldown to 4.2 K, and energization to 6.6 T. Verification of the results with experimental measurements and observations, and limitations of the analysis, are also discussed. 6 refs., 6 figs., 2 tabs

  15. Electrical transport properties and modulus behavior of the organic-inorganic [N(C3H7)4]2SnCl6 compound

    Science.gov (United States)

    Hajlaoui, Sondes; Chaabane, Iskandar; Oueslati, Abderrazak; Guidara, Kamel

    2015-10-01

    In this paper we report the study of electric properties of bis-tetrapropylammoniumhexchlorostannte compound. The plots of -Zʺ versus Z‧ obtained in a range of temperature (343-393 K) and frequency (209 Hz to 5 MHz) were well fitted to an equivalent circuit formed by a parallel combination of resistance (R), fractal capacitance (CPE) and capacitance (C). The frequency dependence of A.C. conductivity has been fitted using Jonscher relation at different temperatures σ (ω) =σdc + Aωs . The variation of the exponent s with temperature indicates that the CBH model is the probable mechanism for the A.C. conduction behavior. The theoretical study of A.C. electrical conduction using single polaron model has been reported. The study of the activation energy obtained from the electric modulus matches well with that obtained from conduction.

  16. Full characterization of the Cu-, Zn-, and Cd-binding properties of CnMT1 and CnMT2, two metallothioneins of the pathogenic fungus Cryptococcus neoformans acting as virulence factors

    Science.gov (United States)

    Palacios, Òscar; Espart, Anna; Espín, Jordi; Ding, Chen; Thiele, Dennis J.; Atrian, Sílvia; Capdevila, Mercè

    2014-01-01

    We report here the full characterization of the metal binding abilities of CnMT1 and CnMT2, two Cryptococcus neoformans proteins recently identified as metallothioneins (MTs), which have been shown to perform a crucial role for the virulence and pathogenicity of this human-infecting fungus. In this work, we first performed a thorough in silico study of the CnMT1 and CnMT2 genes, cDNAs and corresponding encoded products. Subsequently, the Zn(II)-, Cd(II)- and Cu(I) binding abilities of both proteins were fully determined through the analysis of the metal-to-protein stoichiometries and the structural features (determined by ESI-MS, CD, ICP-AES and UV-vis spectroscopies) of the corresponding recombinant Zn-, Cd- and Cu-MT preparations synthesized in metal-enriched media. Finally, the analysis of the Zn/Cd and Zn/Cu replacement processes undertaken by the respective Zn-MT complexes when allowed to react with Cd(II) or Cu(I) aqueous solutions completed the analysis. Comprehensive consideration of all gathered results allow us to consider both isoforms as genuine copper-thioneins, and led to the identification of unprecedented Cu5-core clusters in MTs. CnMT1 and CnMT2 polypeptides appear as evolutionary related to the small fungal MTs, probably by ancient tandem-duplication events responding to a high selective pressure to chelate copper, and far from the properties of Zn- and Cd-thioneins. Finally, we propose a modular structure of the Cu-CnMT1 and Cu-CnMT2 complexes basically built on the three and five-fold presence of 7-Cys units, each one yielding a Cu5-core cluster. PMID:24317230

  17. Statistical universal branching ratios for cosmic ray dissociation, photodissociation, and dissociative recombination of the C(n=2-10), C(n=2-4)H and C3H2 neutral and cationic species

    CERN Document Server

    Chabot, M; Beroff, K; Pino, T; Padellec, A Le; Desequelles, P; Martinet, G; Nguyen-Thi, V O; Carpentier, Y; Petit, F Le; Roueff, E; Wakelam, V

    2010-01-01

    Fragmentation branching ratios of electronically excited molecular species are of first importance for the modeling of gas phase interstellar chemistry. Despite experimental and theoretical efforts that have been done during the last two decades there is still a strong lack of detailed information on those quantities for many molecules such as Cn, CnH or C3H2. Our aim is to provide astrochemical databases with more realistic branching ratios for Cn (n=2 to 10), CnH (n=2 to 4), and C3H2 molecules that are electronically excited either by dissociative recombination, photodissociation, or cosmic ray processes, when no detailed calculations or measurements exist in literature. High velocity collision in an inverse kinematics scheme was used to measure the complete fragmentation pattern of electronically excited Cn (n=2 to 10), CnH (n=2 to 4), and C3H2 molecules. Branching ratios of dissociation where deduced from those experiments. The full set of branching ratios was used as a new input in chemical models and br...

  18. Biodegradation of the Nitramine Explosive CL-20

    OpenAIRE

    Trott, Sandra; Nishino, Shirley F.; Hawari, Jalal; Spain, Jim C.

    2003-01-01

    The cyclic nitramine explosive CL-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane) was examined in soil microcosms to determine whether it is biodegradable. CL-20 was incubated with a variety of soils. The explosive disappeared in all microcosms except the controls in which microbial activity had been inhibited. CL-20 was degraded most rapidly in garden soil. After 2 days of incubation, about 80% of the initial CL-20 had disappeared. A CL-20-degrading bacterial strain, Agrobact...

  19. Spectroelectrochemistry of EuCl3 in four molten salt eutectics; 3 LiCl – NaCl, 3 LiCl – 2 KCl, LiCl – RbCl, and 3 LiCl – 2 CsCl; at 873 K

    Energy Technology Data Exchange (ETDEWEB)

    Schroll, Cynthia A.; Chatterjee, Sayandev; Levitskaia, Tatiana G.; Heineman, William R.; Bryan, Samuel A.

    2016-05-17

    Key electrochemical properties affecting pyroprocessing of nuclear fuel were examined in four eutectic melts using using Eu3+/2+ as a representative probe. We report the electrochemical and spectroelectrochemical behavior of EuCl3 in four molten salt eutectics (3 LiCl – NaCl, 3 LiCl – 2 KCl, LiCl – RbCl and 3 LiCl – 2 CsCl) at 873 K. Cyclic voltammetry was used to determine the redox potential for Eu3+/2+ and the applied potentials for spectroelectrochemistry. Single step chronoabsorptometry and thin-layer spectroelectrochemistry were used to obtain the number of electrons transferred, redox potentials and diffusion coefficients for Eu3+ in each eutectic melt. The redox potentials determined by thin-layer spectroelectrochemistry were extremely close to those obtained using cyclic voltammetry. The redox potential for Eu3+/2+ was most positive in the 3 LiCl - NaCl melt, showed a negative shift in the 3 LiCl - 2 KCl melt, and was the most negative in the LiCl - RbCl and 3 LiCl - 2 CsCl eutectics. The diffusion coefficient for Eu3+ followed this same trend; it was the largest in the 3 LiCl - NaCl melt and the smallest in the LiCl - RbCl and 3 LiCl - 2 CsCl melts. The basic one-electron reversible electron transfer for Eu3+/2+ was not changed by melt composition.

  20. Reactions Between Humic Acid Solutions and Excessive ClO2 or Cl2

    Institute of Scientific and Technical Information of China (English)

    GE Yuan-xin; ZHU Zhi-liang; MA Hong-mei; ZHAO Jian-fu

    2007-01-01

    Reactions between humic acid solutions and excessive ClO2 or Cl2 have been investigated. Under various experimental conditions, the removal efficiency of TOC, UV254 and A140 from humic acid solutions were examined. The relationship between the removal efficiency and the consumption of ClO2 or Cl2 was discussed. The results showed that the maximum demand of ClO2 was 2.19 mg/mg TOC for the humic acid solution under the experimental conditions, and that of Cl2 was 1.88 mg/mg TOC. The variation tendency of ClO2 consumption was similar to that of Cl2. TOC of humic acid solutions decreased 15.2% and 15.6% after the reaction with ClO2 or Cl2 respectively. Under the experimental conditions, 21.4% of unsaturated bonds and 52.8% of humic acid color were removed by ClO2 in 168 h. As for Cl2, removal efficiency of unsaturated bonds and humic acid color were 16.8% and 41.7% respectively. Larger molecules from humic acid were oxidized to smaller molecules by ClO2 and Cl2. Higher oxidation potential of ClO2 than that of Cl2 was also indicated by variation of UV254/A410 ratios. The similar tendency, that exhibited faster variation in the initial 24 h, existed for all the research factors.

  1. Lines of Circumstellar C2, CN, and CH$^+$ in the Optical Spectra of Post-Agb Stars

    CERN Document Server

    Bakker, E J; Van Dishoeck, E F; Bakker, Eric J.; Lambert, David L.; Dishoeck, Ewine F. van

    1996-01-01

    Recent optical spectra of post-AGB stars show the presence of C2, CN, and CH+ originating in the circumstellar shell. We present here new, higher resolution spectra which provide constraints on the physical parameters and information on the line profiles. An empirical curve of growth for the C2 Phillips and CN Red system lines in the spectrum of HD 56126 yields b = 0.50 (+0.59, -0.23) km/s. CH+ (0,0) emission lines in the spectrum of the Red Rectangle have been resolved with a FWHM approx 8.5 pm 0.8 km/s. The circumstellar CN lines of IRAS 08005--2356 are resolved into two separate components with a velocity separation of Delta v = 5.7 pm 2.0 km/s. The line profiles of CN of HD 235858 have not been resolved.

  2. Spin-current injection and detection in κ-(BEDT-TTF2Cu[N(CN2]Br

    Directory of Open Access Journals (Sweden)

    Z. Qiu

    2015-05-01

    Full Text Available Spin-current injection into an organic semiconductor κ-(BEDT-TTF2Cu[N(CN2]Br film induced by the spin pumping from an yttrium iron garnet (YIG film. When magnetization dynamics in the YIG film is excited by ferromagnetic or spin-wave resonance, a voltage signal was found to appear in the κ-(BEDT-TTF2Cu[N(CN2]Br film. Magnetic-field-angle dependence measurements indicate that the voltage signal is governed by the inverse spin Hall effect in κ-(BEDT-TTF2Cu[N(CN2]Br. We found that the voltage signal in the κ-(BEDT-TTF2Cu[N(CN2]Br/YIG system is critically suppressed around 80 K, around which magnetic and/or glass transitions occur, implying that the efficiency of the spin-current injection is suppressed by fluctuations which critically enhanced near the transitions.

  3. Carbon content and C:N ratio of transparent exopolymeric particles (TEP) produced by bubbling exudates of diatoms

    DEFF Research Database (Denmark)

    Mari, Xavier

    1999-01-01

    a coastal area (Kattegat, Denmark), TEP carbon concentration in the surface mixed layer was on the order of 230 ± 150 µg C l-1. This is high relative to other sources of particulate organic carbon (e.g. phytoplankton) and depending on TEP turnover rates, suggests that TEP is an important pathway......-non-limited to N-limited conditions. While the C:N ratio of the diatom cells grown under N-limited conditions was high (C:N >= 14), the TEP aggregates formed by coagulation of the extracellular release produced by these cells exhibited a C:N ratio relatively constant (C:N = 7.3 ± 2.6) and apparently independent...

  4. P/Halley: Spatial distribution and scale lengths for C2, CN, NH2, and H2O

    Science.gov (United States)

    Fink, Uwe; Combi, Michael; Disanti, Michael A.

    1992-01-01

    From P/Halley, long slit spectroscopic exposures on 12 dates, extending from Oct. 1985 to May 1986, spatial profiles were obtained for emissions by C2, CN, NH2, and OI ((sup 1)D). Examples of our derived spatial profiles are given. The qualitative trend of the scale lengths for the different species is nicely exemplified in this example. C2 has the longest parent scale length followed by CN and NH2. OI which tracks the parent H2O distribution is quite narrow but slightly wider than the continuum profile which has a center essentially indistinguishable from the stellar seeing disk. Comparison of C2 and CN also shows that C2 is falling off faster in the wings so that the daughter scale length of CN must be larger than that of C2.

  5. un clúster empresarial

    Directory of Open Access Journals (Sweden)

    Laura Marcela López Posada

    2006-01-01

    Full Text Available Los clústeres empresariales se han constituido en mecanismos para impulsar la competitividad de sectores en regiones y tradicionalmente han sido analizados desde la perspectiva económica (por su aporte en variables macroeconómicas, pero para su consolidación todo conglomerado empresarial requiere la comprensión de relaciones sociales, culturales y políticas. Resulta difícil estudiar estas relaciones desde teorías organizacionales tradicionales como la estructuralista o la contingencial, y se debe recurrir a otras perspectivas como el neoinstitucionalismo sociológico, enfoque que es utilizado en la presente investigación. La investigación fundamento del artículo se hizo en un sector considerado dinámico para el eje cafetero como es el de herramientas, la cual fue abordada desde un enfoque cualitativo mediante la aplicación de dos guías de entrevista semiestructurada (se aplicaron a treinta empresas de la cadena productiva y a nueve entidades de apoyo, diario de campo y análisis de fuentes documentales. Se concluye que en el clúster predominan el individualismo, la descon- fianza y la ausencia de elementos identitarios, simultáneamente con fuertes lazos comerciales y prácticas de gestión que se han institucionalizado por procesos isomórficos.

  6. Biodegradation of the nitramine explosive CL-20.

    Science.gov (United States)

    Trott, Sandra; Nishino, Shirley F; Hawari, Jalal; Spain, Jim C

    2003-03-01

    The cyclic nitramine explosive CL-20 (2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane) was examined in soil microcosms to determine whether it is biodegradable. CL-20 was incubated with a variety of soils. The explosive disappeared in all microcosms except the controls in which microbial activity had been inhibited. CL-20 was degraded most rapidly in garden soil. After 2 days of incubation, about 80% of the initial CL-20 had disappeared. A CL-20-degrading bacterial strain, Agrobacterium sp. strain JS71, was isolated from enrichment cultures containing garden soil as an inoculum, succinate as a carbon source, and CL-20 as a nitrogen source. Growth experiments revealed that strain JS71 used 3 mol of nitrogen per mol of CL-20. PMID:12620886

  7. LiYbCl4(THF4

    Directory of Open Access Journals (Sweden)

    Lukas Richtera

    2011-06-01

    Full Text Available The title compound, di-μ-chlorido-dichlorido-1κ2Cl-tetrakis(tetrahydrofuran-1κ2O,2κ2O-lithiumytterbium(III, [LiYbCl4(C4H8O4], was prepared by the reaction of YbCl3(THF3 with LiCl in THF (THF is tetrahydrofuran. The central motif of the structure is a Yb(μ-Cl2Li ring. The Yb atom is hexacoordinated to four Cl atoms and two THF molecules oriented in a trans fashion. The Li atom has a tetrahedral environment and is coordinated to two Cl atoms and two THF molecules. No intermolecular interactions other than van der Waals forces were observed. Two of the THF molecules are disordered over two positions.

  8. The baryon axial current in large $N_c$ chiral perturbation theory

    CERN Document Server

    Hernandez-Ruiz, Maria A

    2014-01-01

    In this thesis we calculate the baryon axial current within the combined framework of the $1/N_c$ expansion and chiral perturbation theory, where $N_c$ is the number of colors. This calculation shall consider Feynman diagrams to order of one-loop, octet and decuplet intermediaries states. We obtain corrections due to one-loop and perturbative SU(3) symmetry breaking. The first corrections come from Feynman diagrams, then talk about a broken chiral symmetry in the implicit limit $m_q \\rightarrow 0$, where $m_q$ is the quark mass and the second corrections are obtained by ignoring isospin breaking and in that case the SU(3) symmetry breaking a first-order perturbation is included, leading an explicit break symmetry. The matrix elements of the spatial components of the axial operator between the states of the spin flavor symmetry, give the typical values of the axial vector coupling. For the baryon octet, links axial vector are $g_A$, just as they are defined in experiments of baryon semileptonic decays, where $...

  9. Influence of substrate bias voltage on the microstructure of nc-SiOx:H film

    Institute of Scientific and Technical Information of China (English)

    李慧敏; 于威; 徐艳梅; 季云; 蒋昭毅; 王新占; 李晓苇; 傅广生

    2015-01-01

    Amorphous silicon oxide containing nanocrystalline silicon grain (nc-SiOx:H) films are prepared by plasma-enhanced chemical vapor deposition technique at different negative substrate bias voltages. The influence of bias voltage applied to substrate on the microstructure is investigated. The analysis of x-ray diffraction spectra evidences the in-situ growth of nanocrystalline Si. The grain size can be well controlled by varying the substrate bias voltage, and the largest size is obtained at 60 V. Fourier transform infrared spectra studies on the microstructure evolutions of the nc-SiOx:H films suggest that the absorption peak intensities which are related to the defect densities can be well controlled. It can be attributed to the fact that the negative bias voltage provides a useful way to change the energies of the particles in the deposition process, which can provide sufficient driving force for the diffusion and movement for the species on the growing surface and effectively passivate the dangling bonds. Also the larger grain size and lower band gap which will result in better photosensitivity can also be obtained with a moderate substrate bias voltage of 60 V.

  10. Global Currents, Phase Transitions, and Chiral Symmetry Breaking in Large N_c Gauge Theory

    CERN Document Server

    Albash, T; Johnson, C V; Kundu, A; Albash, Tameem; Filev, Veselin; Johnson, Clifford V.; Kundu, Arnab

    2006-01-01

    We study the finite temperature dynamics of SU(N_c) gauge theory for large N_c, with fundamental quark flavours in a quenched approximation, in the presence of a fixed charge under a global current. We observe several notable phenomena. There is a first order phase transition where the quark condensate jumps discontinuously at finite quark mass, generalizing similar transitions seen at zero charge. We find a non-zero condensate at zero quark mass above a critical value of the charge, corresponding to an analogue of spontaneous chiral symmetry breaking at finite number density. We find that the spectrum of mesons contains the expected associated Goldstone (``pion'') degrees of freedom with a mass dependence on the quark mass that is consistent with the Gell-Mann-Oakes-Renner relation. Our tool in these studies is holography, the string dual of the gauge theory being the geometry of $N_c$ spinning D3-branes at finite temperature, probed by a D7-brane.

  11. Comparison of the Gottfried and Adler sum rules within the large-Nc expansion

    International Nuclear Information System (INIS)

    The Adler sum rule for deep inelastic neutrino scattering measures the isospin of the nucleon and is hence exact. By contrast, the corresponding Gottfried sum rule for charged lepton scattering was based merely on a valence picture and is modified both by perturbative and by non-perturbative effects. Noting that the known perturbative corrections to two-loop order are suppressed by a factor 1/Nc2, relative to those for higher moments, we propose that this suppression persists at higher orders and also applies to higher-twist effects. Moreover, we propose that the differences between the corresponding radiative corrections to higher non-singlet moments in charged-lepton and neutrino deep inelastic scattering are suppressed by 1/Nc2, in all orders of perturbation theory. For the first moment, in the Gottfried sum rule, the substantial discrepancy between the measured value and the valence-model expectation may be attributed to an intrinsic isospin asymmetry in the nucleon sea, as is indeed the case in a chiral-soliton model, where the discrepancy persists in the limit Nc→∞

  12. Effect of frictions on cross section quality of thin-walled tube NC bending

    Institute of Scientific and Technical Information of China (English)

    YANG He; GU Rui-jie; ZHAN Mei; LI Heng

    2006-01-01

    The effect of frictions between dies and tube on the cross section quality of thin-walled tube numerical controlled(NC) bending was studied by numerical simulation method, combined with theoretical analysis and experiment. The results show that the frictions between mandrel, wiper, pressure die, bending die and tube have a significant and complicate effect on the section quality of thin-walled tube NC bending. To improve the section quality, frictions between mandrel, wiper and tube should be decreased, but the frictions between the pressure die, bending die and tube increase. The effect on the section distortion is more significant from mandrel, wiper, pressure die to bending die and the effect on the wall thinning more significant from mandrel, pressure die, wiper, to bending die. The effects of frictions between all dies and tube on wall thinning are smaller than their effects on section distortion.Mandrel and wiper should be lubricated well and drawing oil is used to lubricate them in actual production. The frictions between pressure die, bending die and tube should be increased and the dry friction is used between pressure die, bending die and tube in actual production.

  13. Level of Competence of Food & Beverage Services NC II Passers: Basis for Strengthening the Training Program in Western Visayas

    Directory of Open Access Journals (Sweden)

    Raymund B. Moreno

    2014-02-01

    Full Text Available This study aimed to assess the level of competence of Food and Beverage Services NC II certified passers in Western Visayas as part of ensuring that what industry wants (stated as a competency standards comes back in outcomes of training (represented by a credential issued to a learner. Moreover, the result of the study serves as the basis for designing a proposed training plan in strengthening the Food and Beverage Services NC II Training Program in Western Visayas. The study surveyed 50 Food and Beverage Services Certified NC II Passers and 8 supervisors assigned in different hotel establishments in Western Visayas using the survey questionnaire based from TESDA’s training regulations for Food and Beverage Services NC II to collect relevant data from the population of the study. The data was analyzed using frequency count, means, standard deviation, ranks and SPSS software for statistical analysis. Results of the study based on the data culled from the respondents’ collated scores showed that NC II passers are fully aware of the competencies required by the industry in their workplace. T –tests indicated that there are significant differences among the responses of participants NC II passers and their respective supervisors. The obtained p value of 0 .008, 0 .006 and 0 .000 for t- test paired differences was less than 0 .05 alpha levels on basic, common and core competencies. Study also showed that there is a varying degree of responses on the perceived level of competence of Food and Beverage Services NC II passers in Western Visayas in all competencies as rated by the NC II passers’ themselves compared to the ratings of their respective supervisors. Thus, this study supported to the thesis that on the perceived level of competence based on the core competencies, both respondents are in agreement in the importance of executive bodies of national systems that work in the field of competencies standardization and/or certification

  14. Unveiling the microscopic nature of correlated organic conductors: the case of kappa-(BEDT-TTF)2Cu[N(CN)2]BrxCl1-x

    OpenAIRE

    Ferber, Johannes; Foyevtsova, Kateryna; Jeschke, Harald O.; Valenti, Roser

    2012-01-01

    A few organic conductors show a diversity of exciting properties like Mott insulating behaviour, spin liquid, antiferromagnetism, bad metal or unconventional superconductivity controlled by small changes in temperature, pressure or chemical substitution. While such a behaviour can be technologically relevant for functional switches, a full understanding of its microscopic origin is still lacking and poses a challenge in condensed matter physics since these phases may be a manifestation of ele...

  15. Thermodynamic Optimization of DyCl3 -NaCl System

    Institute of Scientific and Technical Information of China (English)

    叶信宇; 孙益民; 张静; 谈君君

    2005-01-01

    In this paper, the phase diagram of the DyCl3 -NaCl system is optimized and calculated with CALPHAD ( calculation of phase diagram ) technology. A set of thermodynamic functions of compounds Na3 DyCl6, NaDyCl4, and NaDY2 Cl7 have been optimized and calculated based on an interactive computer-assisted analysis. The optimized thermodynamic parameters, calculated phase diagram and experimental phase diagram are thermodynamically serf-consistent.

  16. Considerable Enhancement of Emission Yields of [Au(CN)2(-)] Oligomers in Aqueous Solutions by Coexisting Cations.

    Science.gov (United States)

    Wakabayashi, Ryo; Maeba, Junichi; Nozaki, Koichi; Iwamura, Munetaka

    2016-08-01

    The photophysical properties of [Au(CN)2(-)] oligomers in aqueous solutions were investigated as functions of coexisting cations as well as the viscosity and temperature of solutions. A solution of [Au(CN)2(-)] in the concentration range of 0.03-0.2 mol/dm(3) exhibited emission peaks at 460-480 nm because of the presence of oligomers larger than trimers. Although the emission yields (ϕem) of K[Au(CN)2] solutions were wavelength regions were very short and independent of the viscosity of the solutions and coexisting cations (dimer, ∼25 ps; trimer, ∼2 ns). These results indicated that the deactivation of the excited-state [Au(CN)2(-)]n oligomers (n ≥ 4) was dominated by the dissociation of the oligomers to a shorter species (dimer or trimer). The hydrophobic interactions between tetraalkylammonium cations and CN ligands remarkably stabilized the larger oligomers and suppressed the dissociation of the excited-state oligomers, which enhanced the emission yield of the oligomers. This work provides a new method of "exciplex tuning" by changing the environment of excited-state [Au(CN)2(-)]n oligomers. PMID:27391559

  17. Adjustment to the Curve Number Nrcs-Cn to Account for the Vegetation Effect on the Hydrological Processes

    Science.gov (United States)

    Gonzalez, A.; Temimi, M.; Khanbilvardi, R.

    2012-12-01

    The objective of this work is to develop an approach that makes use of remotely sensed Greenness Fraction (GF) as a proxy for the vegetation density to automatically adjust the Curve Number model (NRCS-CN) to account for the effect of the changes in vegetation growth on hydrological processes. Daily gauged precipitation-runoff pairs (1948 to 2003) from the MOdel Parameter Estimation EXperiment dataset (MOPEX) over 26 watersheds across the U.S. were used to estimate monthly averaged CNs (CNsim) and then compared to the monthly GF. An adjustment factor was then proposed for the typical static CN inputs which do not account for the vegetation growth over time; the result was a vegetation-adjusted CN (CNveg adj). The improvement in the performance of the NRCS-CN methodology was assessed. The results evidence how the CNveg adj compensates the underestimation of the standard CN (CNstd). The ratio of the estimated runoff using the CNstd (Qstd) to the observed runoff (Qobs) was 0.36; while with the CNveg adj (Qveg adj) was 0.98. The correlation coefficient of simulated and observed runoff when using CNstd and CNveg adj, was 0.42 and 0.92, respectively. Likewise, the Nash-Sutcliffe coefficient of Qstd was -0.92 and 0.85 for Qveg adj. This implies that the adjustment to the CN is crucial for improved hydrological modeling and, therefore, for flood and flash flood monitoring and forecasting.

  18. Carbon as a source for yellow luminescence in GaN: Isolated CN defect or its complexes

    International Nuclear Information System (INIS)

    We study three carbon defects in GaN, isolated CN and its two complexes with donors CN–ON, and CN–SiGa, as a cause of the yellow luminescence using accurate hybrid density functional calculation, which includes the semi-core Ga 3d electrons as valence electrons and uses a larger 300-atom supercell. We show that the isolated CN defect yields good agreement with experiment on the photoluminescence (PL) peak position, zero-phonon line, and thermodynamic defect transition level. We find that the defect state of the complexes that is involved in the PL process is the same as that of the CN defect. The role of the positively charged donors (ON or SiGa) next to CN is to blue-shift the PL peak. Therefore, the complexes cannot be responsible for the same PL peak as isolated CN. Our detailed balance analysis further suggests that under thermal equilibrium at typical growth temperature, the concentration of isolated CN defect is orders of magnitude higher than the defect complexes, which is a result of the small binding energy in these complexes

  19. Spin-flavor structure of chiral-odd generalized parton distributions in the large-Nc limit

    Science.gov (United States)

    Schweitzer, P.; Weiss, C.

    2016-10-01

    We study the spin-flavor structure of the nucleon's chiral-odd generalized parton distributions (transversity GPDs) in the large-Nc limit of QCD. In contrast to the chiral-even case, only three combinations of the four chiral-odd GPDs are nonzero in the leading order of the 1 /Nc expansion: E¯T=ET+2 H˜T,HT , and E˜T. The degeneracy is explained by the absence of spin-orbit interactions correlating the transverse momentum transfer with the transverse quark spin. It can also be deduced from the natural Nc scaling of the quark-nucleon helicity amplitudes associated with the GPDs. In the GPD E¯T the flavor-singlet component u +d is leading in the 1 /Nc expansion, while in HT and E˜T it is the flavor-nonsinglet components u -d . The large-Nc relations are consistent with the spin-flavor structure extracted from hard exclusive π0 and η electroproduction data, if it is assumed that the processes are mediated by twist-3 amplitudes involving the chiral-odd GPDs and the chiral-odd pseudoscalar meson distribution amplitudes.

  20. Tunable photoluminescence from nc-Si/a-SiNx:H quantum dot thin films prepared by ICP-CVD.

    Science.gov (United States)

    Sain, Basudeb; Das, Debajyoti

    2013-03-21

    Intense visible photoluminescence (PL) tunable within 1.66-2.47 eV, under UV 325 nm excitation, was obtained from nanocrystalline silicon quantum dots (∼5.72-1.67 nm in diameter) embedded in amorphous silicon-nitride matrix (nc-Si/a-SiN(x):H) prepared in RF-ICPCVD (13.56 MHz) at substrate temperatures between 400 to 150 °C. The dominant component of PL, having a narrow band width of ∼0.16-0.45 eV, originates from quasi-direct band-to-band recombination due to quantum confinement effect (QCE) in the nanocrystalline silicon quantum dots (nc-Si QDs) of appropriate size; however, the contribution of defects arose at lower substrate temperatures leading to asymmetric broadening. Intense atomic hydrogen flux in high-density inductively coupled plasmas (ICPs) provides a very high surface coverage, passivates well the nonradiative dangling bonds, and thereby favors the PL intensity. The average size of nc-Si QDs measured by HR-TEM appears consistent with similar estimates from Raman studies. The red shift of the Raman line and corresponding line broadening originates from the confinement of optical phonons within nc-Si QDs. Photoluminescence emerging from nc-Si/a-SiN(x):H quantum dots obtained from the low temperature and single-step plasma processing holds great promise for the fabrication of light-emitting devices and flexible flat panel displays. PMID:23407687

  1. Construction of Listeria monocytogenes ncRNA rli60 Gene Deletion Strain%单核细胞增生李斯特菌ncRNA rli60基因缺失株的构建研究

    Institute of Scientific and Technical Information of China (English)

    彭叶龙; 乔军; 孟庆玲; 谢堃; 赵海龙; 宋雪梅; 陈创夫

    2014-01-01

    为了构建单核细胞增生李斯特菌(Listeria monocytogenes,LM)ncRNA rli60基因缺失株,采用基因重叠延伸PCR (SOE-PCR)的方法成功构建具有氯霉素抗性的pKSV7-Δrli60穿梭质粒,然后电转化至LM-SB5感受态细胞中,在温度和氯霉素的双重选择压力下进行同源重组,通过PCR进行重组菌鉴定。结果表明:成功筛选得到遗传性稳定的LM ncRNA rli60基因缺失株,为揭示LM ncRNA rli60基因功能提供了研究材料;同时,为进一步研究其在LM致病性及环境应激中的分子机制奠定了基础。%To construct the ncRNA rli60 gene deletion strain of Listeria monocytogenes,the shuttle plasmid pKSV7-Δrli60 with chloramphenicol resistance was gained by overlap extension PCR successfully,which was electroporated into the LM-SB5 competent cell for homologous recombinant under the double pressure of temperature and chloramphenicol.Recombinant LM was identified by PCR.LM ncRNA rli60 gene deletion strain was successfully screened by PCR,which had stable genetic characteristic.This study provided materials for revealing the function of ncRNA rli60 gene and laid foundation for further study of the molecular mechanism in the LM pathogenicity and environmental stress.

  2. Occult cervical lymph node metastases in 100 consecutive patients with cN0 tongue cancer

    Institute of Scientific and Technical Information of China (English)

    JIN Wu-long; YE Wei-min; ZHENG Jia-wei; ZHOU Liang; ZHU Han-guang; ZHANG Zhi-yuan; TIAN Jie

    2008-01-01

    Background Squamous cell carcinoma (SCC) of the tongue is one of the most common cancers in the oral and maxillofacial region. To provide clinical evidence for selective neck dissection in management of cN0 patients by analyzing the characteristics and correlation of factors of occult cervical lymph node metastases (OCLNM) in patients with SCC of the tongue.Methods From 2002 to 2006, 100 consecutive patients with SCC of the tongue were reviewed by analyzing the characteristics of OCLNM, diameter of the tumor, T classifications, depth of invasion, forms of growth, pathological grade and degree of differentiation.Results The rate of OCLNM in 100 patients with SCC of the tongue was 22%. The most common region with OCLNM was level Ⅱ in the ipsilateral neck, followed by levels Ⅰ and Ⅲ. There were 51.61% (16/31) of OCLNM in level Ⅱ and 87.10% (27/31) of OCLNM in levels Ⅰ-Ⅲ. There was no significant correlation between the diameter of tumor and OCLNM (P >0.05). OCLNM was statistically significantly correlated with the depth of invasion, forms of growth, pathological grade and degree of differentiation (P <0.05). The rate of occult metastases increased with the increased pathological grade,the decreased degree of differentiation and the increased depth of invasion.Conclusions The most common regions with OCLNM in cN0 patients with SCC of the tongue were levels Ⅰ-Ⅲ in the ipsilateral neck. Supraomohyoid neck dissection should be the elective treatment to the neck in patients with cN0 SCC of the tongue by consideration of the clinical and pathological factors for the depth of invasion, forms of growth, pathological grade, and degree of differentiation.

  3. Measures to Improve NC Machining Quality%提高数控加工质量的措施

    Institute of Scientific and Technical Information of China (English)

    钱志英

    2013-01-01

    为高效地使用数控机床,提高数控加工质量,结合多年的教学和实践经验,论述了影响数控加工质量的因素,提出了提高加工质量的相关措施。%In order to use CNC machine tools efficiently and improve the quality of NC machining ,combining with years of experience of teaching and practice ,the author discussed the factors which affect the quality of NC machining ,and put forward some measures to improve the machining quality of NC machine tools .

  4. Structural and mechanical properties of nc-TiC/a-C:H nanocomposite film prepared by dual plasma technique

    International Nuclear Information System (INIS)

    Nanocomposite nc-TiC/a-C:H film, with an unusual combination of superhardness, high elastic modulus and high elastic recovery, are prepared by using the dual plasma technique. The effects of the filter coil current on the compositional, structural and mechanical properties of the nc-TiC/a-C:H films have been investigated. X-ray photoelectron spectroscopy (XPS) and Raman analyses show that deposition rate, composition and nanostructure of the nc-TiC/a-C:H films could be changed by varying the filter coil current. Fortunately, by selecting the proper value for the filter coil current, 2.5 A, one could remarkably enhance mechanical properties of films such as the superhardness (66.4 GPa), the high elastic modulus (510 GPa) and the high elastic recovery (83.3%)

  5. Ionization potentials and polarizabilities of superheavy elements from Db to Cn ($Z$=105 to 112)

    CERN Document Server

    Dzuba, V A

    2016-01-01

    Relativistic Hartree-Fock and random phase approximation methods for open shells are used to calculate ionization potentials and static scalar polarizabilities of eight superheavy elements with open $6d$-shell, which include Db, Sg, Bh, Hs, Mt, Ds, Rg and Cn ($Z$=105 to 112). Inter-electron correlations are taken into account with the use of the semi-empirical polarization potential. Its parameters are chosen to fit the known ionization potentials of lighter atoms. Calculations for lighter atoms are also used to illustrate the accuracy of the approach.

  6. Morphological evolution of prussian yellow Fe[Fe(CN)6] colloidal nanospheres

    Science.gov (United States)

    Gu, Jianmin; Fu, Shaoyan; Jin, Cuihong; Liu, Xin; Gao, Yahui; Wu, Jingxiao; Bian, Zhenpan; Tian, Hua; Wang, Lin; Gao, Faming

    2016-07-01

    A simple hydrothermal system was developed for controllable morphologies of the Prussian yellow Fe[Fe(CN)6] nanostructures in the presence of organic additives. Hollow and solid nanospheres of the Prussian yellow materials were successfully synthesized with suitable experimental conditions. It is found that the amounts of organic additives CTAB could result in the formation of the spherical nanocrystals and the hydrolysis of phosphate in the solution could play a role in the final morphology of the products. A possible formation mechanism of the Prussian yellow nanostructures is proposed.

  7. 低价风暴七彩虹CN7050PV主板

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    随着AMD690系列集成主板在性价比方面的优势逐渐凸现,nVIDIA的C61主板渐渐开始力不从心。在经历了“漫长”的等待后,nVIDIA的集成主板新军C68终于面世。不久前,PCD实验室就收到了这么一款采用C68芯片的主板一七彩虹智能主板CN7050PV。

  8. On Levi-fiat hypersurfaces with given boundary in C~n

    Institute of Scientific and Technical Information of China (English)

    Pierre; DOLBEAULT

    2008-01-01

    Let S■C~n be a compact connected 2-codimensional submanifold.If n≥3,essentially local conditions and the assumption:every complex point of S is elliptic imply the existence of a projection in C~n of a Levi-flat(2n-1)-subvariety whose boundary is S(Dolbeault,Tomassini,Zaitsev, 2005).We extend the result when S is homeomorphic to a sphere and has one hyperbolic point. For n=2 many results are known since the 1980’s and a new result with a very technical hypothesis is announced.

  9. New $AdS_4\\times X_7$ Geometries with $\\CN=6$ in M Theory

    CERN Document Server

    Lee, K M; Lee, Ki-Myeong; Yee, Ho-Ung

    2007-01-01

    We construct new supersymmetric $AdS_4\\times X_7$ solutions of 11-dim supergravity where the tri-Sasakian space $X_7$ has generically $U(1)^2\\times SU(2)_R$ isometry. The compact and regular 7-dim spaces $X_7=S(t_1,t_2,t_3)$ are originated from 8-dim hyperkahler quotient of a 12-dim flat hyperkahler space by U(1). We calculate the volume of $X_7$ and that of the supersymmetric five cycle via localization. From this we discuss the 3-dim dual superconformal field theories with $\\CN=3$ supersymmetry.

  10. Results from Modeling CN Jets in Comet Lulin (C/2007 N3)

    Science.gov (United States)

    Bair, Allison Nicole; Schleicher, David G.; Knight, Matthew M.

    2016-10-01

    We present results from Monte Carlo modeling of the CN jets on dynamically new Comet Lulin (C/2007 N3). Our model is based on 16 nights of narrowband imaging obtained with Lowell Observatory's 1.1-m Hall Telescope from 2009 January 30 through April 1, an interval during which our viewing orientation varied by more than 120 degrees. Following basic image enhancement by removing median radial profiles, two opposite pointing corkscrew jets were revealed, and a rotation period of 42 +/- 0.5 hr was determined (Knight & Schleicher 2009; IAU Circular #9025). The presence of these two distinct, non-overlapping jets, combined with the large change in aspect angle, made Lulin an excellent candidate for detailed 3-D jet modeling, allowing us to test a number of physical properties of outgassing which can eventually be utilized for other comets. We successfully reproduced Lulin's CN morphology using a nucleus having a tightly constrained obliquity of 95 deg with the axis pointing toward RA = 90 deg and Dec = +27 deg. The jet towards the west is centered at ~65 deg latitude and has a radius of ~25 deg, while the east jet is centered near -75 deg latitude and has a radius of ~15 deg. The longitudes differ by about 120 deg. The rotation axis crossed the plane of the sky on Feb 22, coincidently just prior to opposition. Our modeling shows that at this heliocentric distance of 1.4 AU, the CN gas continued to accelerate away from the nucleus out to a distance of about 20,000 km, reaching a velocity of 0.48 km/s. We also significantly improved the period determination since the model compensates for the rapidly changing viewing geometry, obtaining a sidereal period of 42.0 +/- 0.2 hr. We see a strong seasonal change in activity consistent with the variation in the sub-solar latitude from January until April as the CN jets change in brightness relative to each other. These and other results will be presented. Support is provided by NASA Planetary Atmospheres Grant NNX14AH32G.

  11. Ab initio adiabatic and quasidiabatic potential energy surfaces of H++ CN system

    Indian Academy of Sciences (India)

    Bhargava Anusuri; Sanjay Kumar

    2016-02-01

    We present restricted geometry (collinear and perpendicular approaches of proton) ab initio three dimensional potential energy surfaces for H++ CN system. The calculations were performed at the internally contracted multi-reference configuration interaction level of theory using Dunning’s correlation consistent polarized valence triple zeta basis set. Adiabatic and quasidiabatic surfaces have been computed for the ground and the first excited electronic states. Nonadiabatic effects arising from radial coupling have been analyzed in terms of nonadiabatic coupling matrix elements and coupling potentials.

  12. Full dimensional quantum scattering study of the H2 + CN reaction

    Indian Academy of Sciences (India)

    S Bhattacharya; A Kirwai; Aditya N Panda; H-D Meyer

    2012-01-01

    Exact wave packet calculations are carried out to investigate the effect of vibrational excitation of the reagent bonds on the dynamics of the CN + H2 → HCN + H process using the multiconfiguration time-dependent Hartree algorithm. The results are compared to the approximate theoretical and the available experimental results. The differences between the results of the theoretical studies are discussed from the point of view of an approximate or exact kinetic energy operator used in the quantum mechanical studies. Deviations between exact theoretical and experimental results points to the inaccuracies of the potential energy surface used.

  13. The Effect of Pressure on Magnetic Properties of KMnCr(CN6.

    Directory of Open Access Journals (Sweden)

    Csach K.

    2013-01-01

    Full Text Available In the contribution we present the effect of pressure on magnetic properties of molecule based magnet KMnCr(CN6. Applied pressure affects magnetization curves only marginally. The saturation is reached at higher magnetic fields under pressure, but the effect of the pressure on the values of saturated magnetization µs, remnant magnetization µr and coercive field HC are almost negligible. Observed pronounced increase of the Curie temperature TC with increasing pressure can be attributed to strengthening of antiferromagnetic superexchange interaction. Additionally we observed double magnetic transition induced by hydrostatic pressure. All pressure changes were fully reversible.

  14. SOUDAGE D'ACIER Z 2 CN 18-10 PAR LASER CO2

    OpenAIRE

    Petesch, B.; SAKOUT, A; Laurent, M.; M. Robin

    1987-01-01

    Le soudage d'un acier Z 2 CN 18 par faisceau laser a été étudié. L'influence principaux paramètres vitesse, puissance, focalisation a été examinée. Les moyens classiques de caractérisation des soudures ont été utilisées : observations métallographiques forme de la zone fondue, quantité de porosités et énergie absorbée. Le maximum de pénétration correspond au maximum d'énergie absorbée.

  15. Efficient Room-Temperature Activation of Methane by TaN(+) under C-N Coupling.

    Science.gov (United States)

    Zhou, Shaodong; Li, Jilai; Schlangen, Maria; Schwarz, Helmut

    2016-09-12

    The thermal reaction of diatomic tantalum nitride cation [TaN](+) with methane has been explored using FT-ICR mass spectrometry complemented by high-level quantum chemical calculation; based on this combined experimental/computational approach, mechanistic aspects of this novel, highly efficient C-N coupling process have been uncovered. In distinct contrast to [TaN](+) , its lighter congeners [VN](+) and [NbN](+) are inert towards methane under ambient conditions, and the origins of the remarkably variable efficiencies of the three metal nitrides are uncovered by CCSD(T) calculations. PMID:27510819

  16. 76 FR 34014 - Airworthiness Directives; Bombardier, Inc. Model CL-215-1A10, CL-215-6B11 (CL-215T Variant), and...

    Science.gov (United States)

    2011-06-10

    ... Procedures (44 FR 11034, February 26, 1979); and 3. Will not have a significant economic impact, positive or.... Model CL-215-1A10, CL- 215-6B11 (CL-215T Variant), and CL-215-6B11 (CL-415 Variant) Airplanes AGENCY.... Model CL-215-1A10 airplanes, serial numbers 1051 through 1125 inclusive; Model CL-215- 6B11...

  17. Comparative study of the structure of a-CN x and a-CN x:H films using NEXAFS, XPS and FT-IR analysis

    International Nuclear Information System (INIS)

    Amorphous carbon nitride thin films have become a matter of great attention due to their remarkable electronic and mechanical properties. It has been shown that hydrogen and nitrogen incorporation deeply modifies the properties of carbon films. Therefore, the optimization of their properties requires a deep knowledge of various kind of chemical bonds composing in the film matrix. The topic of this presentation is to get more insight into the different local environment of the C and N atoms for hydrogenated and hydrogen-free amorphous carbon nitrides films. H-incorporation has been varied using different deposition technique from plasma-enhanced chemical vapor deposition (PECVD) leading to highly hydrogenated films up to 40 at.% to radio-frequency (RF) magnetron sputtering providing nearly hydrogen-free films. The study of the local structure is done using the combination of Fourier transform infrared (FT-IR), X-ray photo-emission spectroscopy (XPS) and high resolution near edge X-ray absorption fine structure (NEXAFS) analysis. FT-IR spectroscopy is widely used to probe the bonding configurations in the carbonaceous materials, especially the C≡N, C-H and N-H bonds in a-CN x:H. In addition, XPS and NEXAFS provide surface information on the environment around C and N atoms and on the chemical composition. NEXAFS gives a better description of the π* states inside the films, due to its remarkable energy resolution. The combination of both characterizations FT-IR and NEXAFS may leave the controversy about the interpretation of the XPS spectra, and allows a fine analysis of the evolution of the local structure as a function of nitrogen incorporation, according to the hydrogen concentration into the films. Fundamental differences can be revealed between hydrogenated and hydrogen-free carbon nitride: in the former, hydrogen promotes double bonds C=N-H, whereas in the latter nitrogen atoms prefer to substitute to carbon or interconnect aromatic rings through single bonds

  18. Heterogeneous computing with OpenCL

    CERN Document Server

    2013-01-01

    Heterogeneous Computing with OpenCL teaches OpenCL and parallel programming for complex systems that may include a variety of device architectures: multi-core CPUs, GPUs, and fully-integrated Accelerated Processing Units (APUs) such as AMD Fusion technology. Designed to work on multiple platforms and with wide industry support, OpenCL will help you more effectively program for a heterogeneous future. Written by leaders in the parallel computing and OpenCL communities, this book will give you hands-on OpenCL experience to address a range of fundamental parallel algorithms. The authors explore memory spaces, optimization techniques, graphics interoperability, extensions, and debugging and profiling. Intended to support a parallel programming course, Heterogeneous Computing with OpenCL includes detailed examples throughout, plus additional online exercises and other supporting materials.

  19. WCOBRA/TRAC-TF2 simulation of ROSA-IV/LSTF natural circulation test ST-NC-02

    International Nuclear Information System (INIS)

    The paper presents WCOBRA/TRAC-TF2 simulation results of the high-pressure (∼7 MPa) steady-state natural circulation test ST-NC-02 conducted at the ROSA-IV Large Scale Test Facility (LSTF). The simulations used a fairly detailed noding of the LSTF particularly in the vessel and the primary and secondary side of the steam generators. A single flow channel is used to model the primary side of the steam generator U-tubes. In general, the results are in good agreement with those observed in the ST-NC-02 test. (author)

  20. 数控机床产业强势增长%Robust growth of NC machine tool industry

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    @@ The machine tool industry is an industry which provides production equipment for the equipment manufacturing industry, and the machine tool is the parent machine for equipment manufacturing, playing a key part in the industry.The equipment manufacturing industry, for example, the automobile industry, uses more than 60% of its fixed asset investment in the purchase of machine tools.The numerical control (NC)machine tool, as a mainstream product of the machine tool sector, has become a key piece of equipment for achieving modernisation of equipment manufacturing.It is the realistic requirement to speed up development of NC machine production for the development of China's equipment manufacturing industry.