cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Redundancy in the biosynthesis of triacylglycerol by Rhodococcus
Creators: name: Diaz Salazar Albelda, Carlos
Publisher: name: University of British Columbia
Year: 2016

description: Many mycolic acid-containing actinobacteria are oleaginous, accumulating high amounts of triacylglycerols (TAGs) under conditions of nutrient stress. These bacteria contain multiple copies of the genes involved in TAG biosynthesis: glycerol-phosphate acyltransferase (GPAT), acylglycerol-phosphate acyltransferase (AGPAT), phosphatidic acid phosphatase (PAP) and diglyceride acyltransferases (WS/DGAT), encoded by plsB, plsC, pap, and atf, respectively. Analysis of Rhodococcus jostii RHA1’s genome revealed that it carries 1 plsB, 8 plsC, 7 pap, and 16 atf. Quantitative, time-dependent data of six of these atf genes, selected based on previous transcriptomics data, revealed distinct expression patterns under nitrogen-limiting (N-) and carbon-limiting (C-) conditions. For example, the levels of atf10, atf3 and atf8 transcripts dropped ~10-fold upon growth substrate depletion, while the levels of atf4, atf6 and atf9 transcripts rose. Under N- conditions, RHA1 cells continued to accumulate TAGs for five days after ammonia depletion, during which time atf10 and atf8 transcripts remained abundant. Targeted deletion of any one of atf3, atf4, atf6, atf9 and atf10 did not significantly affect TAG accumulation under N- conditions, consistent with the redundancy of putative acyltransferases in the RHA1 genome. However, deletion of both atf8 and atf10 resulted in a 50% decrease in TAG accumulation. Furthermore, the fatty acid profile of the ∆atf8∆atf10 mutant was significantly perturbed, and was restored by complementation with either atf8 or atf10. RT-qPCR data analysis also revealed that the expression patterns of plsC (RS27555) and plsB were the same as that of atf9, consistent with their occurrence in an operon. Unexpectedly, deletion of plsB did not affect TAG accumulation, suggesting an alternative pathway for TAG and phospholipids biosynthesis. Finally, I identified three genes encoding HAD-type hydrolases as being putatively involved in TAG biosynthesis, including one that occurs as a fusion with plsC. The available data suggest that they act as PAPs. Overall, the results establish that there is a certain degree of functional redundancy in TAG biosynthesis, and that Atf8 and Atf10 play a major role in TAG accumulation. At the same time, the results also highlight important gaps in our knowledge of TAG biosynthesis in mycolic acid-containing oleaginous actinobacteria.
Closed-shell properties of $^{24}$O with {\em ab initio} coupled-cluster theory
Creators: name: Jensen, Ø.
name: Hagen, G.
name: Hjorth-Jensen, M.
name: Vaagen, Jan S.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We present an \emph{ab initio} calculation of spectroscopic factors for neutron and proton removal from $^{24}$O using the coupled-cluster method and a state-of-the-art chiral nucleon-nucleon interaction at next-to-next-to-next-to-leading order. In order to account for the coupling to the scattering continuum we use a Berggren single-particle basis that treats bound, resonant, and continuum states on an equal footing. We report neutron removal spectroscopic factors for the $^{23}$O states $J^π = 1/2^+$, $5/2^+$, $3/2^-$ and $1/2^-$, and proton removal spectroscopic factors for the $^{23}$N states $1/2^-$ and $3/2^-$. Our calculations support the accumulated experimental evidence that $^{24}$O is a closed-shell nucleus.
description: 5 pages, 2 figures, 1 table
title: Effects of the barbell load on the acceleration phase during the snatch in Olympic weightlifting
Creators: name: Sandau, Ingo
name: Granacher, Urs
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 796 Sportarten, Sportspiele

description: The load-depended loss of vertical barbell velocity at the end of the acceleration phase limits the maximum weight that can be lifted. Thus, the purpose of this study was to analyze how increased barbell loads affect the vertical barbell velocity in the sub-phases of the acceleration phase during the snatch. It was hypothesized that the load-dependent velocity loss at the end of the acceleration phase is primarily associated with a velocity loss during the 1st pull. For this purpose, 14 male elite weightlifters lifted seven load-stages from 70–100% of their personal best in the snatch. The load–velocity relationship was calculated using linear regression analysis to determine the velocity loss at 1st pull, transition, and 2nd pull. A group mean data contrast analysis revealed the highest load-dependent velocity loss for the 1st pull (t = 1.85, p = 0.044, g = 0.49 [−0.05, 1.04]) which confirmed our study hypothesis. In contrast to the group mean data, the individual athlete showed a unique response to increased loads during the acceleration sub-phases of the snatch. With the proposed method, individualized training recommendations on exercise selection and loading schemes can be derived to specifically improve the sub-phases of the snatch acceleration phase. Furthermore, the results highlight the importance of single-subject assessment when working with elite athletes in Olympic weightlifting.
description: Postprints der Universität Potsdam : Humanwissenschaftliche Reihe; 681
Constraining the regular Galactic Magnetic Field with the 5-year WMAP polarization measurements at 22 GHz
Creators: name: Ruiz-Granados, B.
name: Rubino-Martin, J. A.
name: Battaner, E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: [ABRIDGED] The knowledge of the regular component of the Galactic magnetic field gives important information about the structure and dynamics of the Milky Way, as well as constitutes a basic tool to determine cosmic rays trajectories. It can also provide clear windows where primordial magnetic fields could be detected. We want to obtain the regular (large scale) pattern of the magnetic field distribution of the Milky Way that better fits the polarized synchrotron emission as seen by the 5-year WMAP data at 22 GHz. We have done a systematic study of a number of Galactic magnetic field models: axisymmetric, bisymmetric, logarithmic spiral arms, concentric circular rings with reversals and bi-toroidal. We have explored the parameter space defining each of these models using a grid-based approach. In total, more than one million models are computed. The model selection is done using a Bayesian approach. For each model, the posterior distributions are obtained and marginalised over the unwanted parameters to obtain the marginal 1-D probability distribution functions. In general, axisymmetric models provide a better description of the halo component, although attending to their goodness-of-fit, the rest of the models cannot be rejected. In the case of disk component, the analysis is not very sensitive for obtaining the disk large scale structure, because of the effective available area (less than 8% of the whole map and less than 40% of the disk). Nevertheless, within a given family of models, the best-fit parameters are compatible with those found in the literature. The family of models that better describes the polarized synchrotron halo emission is the axisymmetric one, with magnetic spiral arms with a pitch angle of ~24 degrees, and a strong vertical field of 1 microG at z ~ 1 kpc. When a radial variation is fitted, models require fast variations.
description: 14 pages, 9 figures. Accepted for publication in A&A
title: Divergent role of sphingosine 1-phosphate in liver health and disease
Creators: name: Kleuser, Burkhard
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften
subject: 570 Biowissenschaften; Biologie

description: Two decades ago, sphingosine 1-phosphate (S1P) was discovered as a novel bioactive molecule that regulates a variety of cellular functions. The plethora of S1P-mediated effects is due to the fact that the sphingolipid not only modulates intracellular functions but also acts as a ligand of G protein-coupled receptors after secretion into the extracellular environment. In the plasma, S1P is found in high concentrations, modulating immune cell trafficking and vascular endothelial integrity. The liver is engaged in modulating the plasma S1P content, as it produces apolipoprotein M, which is a chaperone for the S1P transport. Moreover, the liver plays a substantial role in glucose and lipid homeostasis. A dysfunction of glucose and lipid metabolism is connected with the development of liver diseases such as hepatic insulin resistance, non-alcoholic fatty liver disease, or liver fibrosis. Recent studies indicate that S1P is involved in liver pathophysiology and contributes to the development of liver diseases. In this review, the current state of knowledge about S1P and its signaling in the liver is summarized with a specific focus on the dysregulation of S1P signaling in obesity-mediated liver diseases. Thus, the modulation of S1P signaling can be considered as a potential therapeutic target for the treatment of hepatic diseases.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1051
Profitability of insect production for T. molitor farms in the Netherlands
Creators: name: Niyonsaba, H.H.
name: Groeneveld, I.L.
name: Vermeij, I.
name: Höhler, J.
name: van der Fels-Klerx, H.J.
name: Meuwissen, M.P.M.
Publisher: name: Brill Online
Year: 2023
Subjects: classificationCode: 309999
subject: Other agricultural, veterinary and food sciences not elsewhere classified

description: Insects are increasingly considered as a relevant alternative protein source in the transition to a more circular economy and more sustainable food production. Understanding the profitability of insect farms is crucial for starting entrepreneurs, established rearers, and third parties. In this study we analysed the revenues and expenses of seven T. molitor farms in the Netherlands, representing approximately a quarter of the total sector. We calculated their gross margin and net present value. Revenues came from the sales of fresh larvae and insect frass, and from extension services. Expenses included investments, and non-allocated and variable expenses. Results cover technical and economic results, and a qualitative description of farm operations. The gross margins and net present values ranged from -180 to 2,030 and from -12,359 to 15,535 EUR/tonne fresh larvae production, respectively. The main determinants of T. molitor farms’ profitability included the sales price of larvae, and its labour and substrate expenses. Our estimates can be used by decision making of farmers, credit providers, and policy makers to support the growth of this still very small, but emerging sector.
Near infra-red Mueller matrix imaging system and application to strain imaging
Creators: name: Aas, Lars Martin Sandvik
name: Ellingsen, Pål Gunnar
name: Kildemo, Morten
Publisher: name: arXiv
Year: 2010
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: We report on the design and performance of a near infra-red Mueller matrix imaging ellipsometer, and apply the instrument to strain imag- ing in near infra-red transparent solids. Particularly, we show that the instrument can be used to investigate complex strain domains in multi-crystalline silicon wafers.
description: Submitted to Thin Solid Films, 14 pages, 10 figures
title: Flux-P
title: automating metabolic flux analysis
titleType: Subtitle
Creators: name: Ebert, Birgitta E.
name: Lamprecht, Anna-Lena
name: Steffen, Bernhard
name: Blank, Lars M.
Publisher: name: Universität Potsdam
Year: 2020
Subjects: subject: 540 Chemie und zugeordnete Wissenschaften
subject: 570 Biowissenschaften; Biologie

description: Quantitative knowledge of intracellular fluxes in metabolic networks is invaluable for inferring metabolic system behavior and the design principles of biological systems. However, intracellular reaction rates can not often be calculated directly but have to be estimated; for instance, via 13C-based metabolic flux analysis, a model-based interpretation of stable carbon isotope patterns in intermediates of metabolism. Existing software such as FiatFlux, OpenFLUX or 13CFLUX supports experts in this complex analysis, but requires several steps that have to be carried out manually, hence restricting the use of this software for data interpretation to a rather small number of experiments. In this paper, we present Flux-P as an approach to automate and standardize 13C-based metabolic flux analysis, using the Bio-jETI workflow framework. Exemplarily based on the FiatFlux software, it demonstrates how services can be created that carry out the different analysis steps autonomously and how these can subsequently be assembled into software workflows that perform automated, high-throughput intracellular flux analysis of high quality and reproducibility. Besides significant acceleration and standardization of the data analysis, the agile workflow-based realization supports flexible changes of the analysis workflows on the user level, making it easy to perform custom analyses.
description: Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe; 1054
Studies of the relativistic Vlasov-Poisson system
Creators: name: Young, Brent Oneil Joseph
Publisher: name: No Publisher Supplied
Year: 2011

description: We examine several questions pertaining to the relativistic Vlasov-Poisson system withattractive coupling (rVP−) raised in a recent paper [KTZ08] by Kiessling and Tahvildar-Zadeh (KTZ). First, KTZ proved that for everyβ≥3/2 there is a critical, non-zerovalueC−βsuch that certain initial data withLβnorm less thanC−βlaunch solutionsto rVP−which exist globally in time. The authors obtained the sharp value forC−3/2and characterized the remaining constants via a minimization problem. We show theexistence of minimizers and calculateC−βforβ >3/2.Second, KTZ proved that any spherically symmetric classical solution of rVP−launched by zero energy initial data with virial≤ −1/2 will blow up in finite time.However, Simone Calogero has raised the question whether any such data exist at all.We settle this question by constructing two different classes of such initial data.Third, we examine the recent proposal in [KTZ08] whereby rVP−might be derivedfrom an overall neutral two-specie, spherically symmetric plasma with initial conditionchoseniidin both species, interacting through regularized electromagnetic fieldsonspace-time scales not typically considered in Vlasov-type limits.We show first that onthe usual scales the familiar relativistic Vlasov-Poisson system for an overall neutraltwo-specie plasma is obtained if the particles of each specie are separately choseniidbyf+0andf−0respectively. Iff+0=f−0this dynamics reduces to trivial free-streaming of all particles, withf+t=f−tfor all later times (on this Vlasov scale). To see non-trivialplasma dynamics, the usual procedure would be to look at longer time scales and tocorrect the dynamics by adding a “relativistic” generalization of the Lenard-Balescu“collision” operator to the free-streaming Vlasov operator. The proposal in [KTZ08] isthat instead of the collision operator, the rVP−force term of a single specie Newtonsystem could emerge on thea prioriscales. We examine this proposal for the simplercase of purely Coulombic interactions. We will extract from this reduced model evidenceforbothan rVP−force term and a dissipative operator that govern the dynamics.
Directed transport driven by the transverse wall vibration
Creators: name: Ai, Bao-quan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Directed transport of overdamped Brownian particles in an asymmetrically periodic tube is investigated in the presence of the tube wall vibration. From the Brownian dynamics simulations we can find that the perpendicular wall vibration can induce a net current in the longitudinal direction when the tube is asymmetric. The direction of the current at low frequency is opposite to that at high frequency. One can change the direction of the current by suitably tailoring the frequency of the wall vibration.
description: 6 pages, 7 figures
Additional file 1 of A comparative analysis on characteristics and mortalities of four key transmission populations on antiretroviral therapy: a retrospective cohort study in Northwest China
Creators: name: Feng, Shuo
name: Zhu, Zirong
name: Yang, Pengju
name: Jin, Juan
name: Tuo, Huihui
name: Wang, Ning
name: Bai, Ruimin
name: Sun, Yan
name: Song, Liumei
name: Zhang, Xiu
name: Wang, Shengbang
name: Duan, Qiqi
name: Huang, Yingjian
name: Zheng, Yan
name: Xu, Songhua
Publisher: name: figshare
Year: 2022
Subjects: Medicine
Cell Biology
Biotechnology
Biological Sciences not elsewhere classified
Cancer
Science Policy

description: Additional file 1: Supplementary Figure S1. Mortality rate among PLWH receiving ART in 2010–2019.
Three-body rf association of Efimov trimers
Creators: name: Tscherbul, T. V.
name: Rittenhouse, Seth T.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We present a theoretical analysis of rf association of Efimov trimers in a 2-component Bose gas with short-range interactions. Using the adiabatic hyperspherical Green's function formalism to solve the quantum 3-body problem, we obtain universal expressions for 3-body rf association rates as a function of the s-wave scattering length $a$. We find that the association rates scale as $a^{-2}$ in the limit of large $a$, and diverge as $a^3 a_{ad}^{3}$ whenever an Efimov state crosses the atom-dimer threshold (where $a_{ad}$ stands for the atom-dimer scattering length). Our calculations show that trimer formation rates as large as $\sim10^{-21}$ cm$^6$/s can be achieved with rf Rabi frequencies of order 1 MHz, suggesting that direct rf association is a powerful tool of making and probing few-body quantum states in ultracold atomic gases.
description: 4 pages, 2 figures
Optimal age and outcome measures for Alzheimer's disease prevention trials in people with Down syndrome
Creators: name: Hithersay, R
name: Baksh, RA
name: Startin, CM
name: Wijeratne, P
name: Hamburg, S
name: Carter, B
name: Consortium, The LonDownS
name: Strydom, A
name: Fisher, E
name: Nizetic, D
name: Hardy, J
name: Tybulewicz, V
name: Karmiloff-Smith, A
Publisher: name: The Francis Crick Institute
Year: 2021
Subjects: subject: Model organisms
subject: Signalling & Oncogenes
subject: Developmental Biology
subject: Human Biology & Physiology
subject: Cell Biology
subject: Immunology
subject: FOS: Clinical medicine

description: Introduction: People with Down syndrome (DS) typically develop Alzheimer's disease (AD) neuropathology before age 40, but a lack of outcome measures and longitudinal data have impeded their inclusion in randomized controlled trials (RCTs). Methods: Cohort study. Event-based and dose-response Emax models were fitted to longitudinal cognitive data, to stage AD and determine the earliest ages of decline. Results informed sample size estimations for hypothetical RCTs of disease-modifying treatments that reduced decline by 35% or 75%. Results: Seventy-five percent of participants progressed or remained stable in the AD staging model; effect sizes varied by age group and tests. Varied treatment effects could be detected with 50-200 people per arm when using sensitive cognitive outcome measures and targeting recruitment to ages 36 to 45 years. Discussion: Efficient RCTs of AD preventative treatments can be conducted in the DS population using sensitive outcome measures to monitor early decline. Dose-response models could help tailor future RCTs.
The UA9 experimental layout
Creators: name: Scandale, W.
name: Arduini, G.
name: Assmann, R.
name: Bracco, C.
name: Cerutti, F.
name: Christiansen, J.
name: Gilardoni, S.
name: Laface, E.
name: Losito, R.
name: Masi, A.
name: Metral, E.
name: Mirarchi, D.
name: Montesano, S.
name: Previtali, V.
name: Redaelli, S.
name: Valentino, G.
name: Schoofs, P.
name: Smirnov, G.
name: Tlustos, L.
name: Bagli, E.
name: Baricordi, S.
name: Dalpiaz, P.
name: Guidi, V.
name: Mazzolari, A.
name: Vincenzi, D.
name: Dabagov, S.
name: Murtas, F.
name: Carnera, A.
name: Della Mea, G.
name: De Salvador, D.
name: Lombardi, A.
name: Lytovchenko, O.
name: Tonezzer, M.
name: Cavoto, G.
name: Ludovici, L.
name: Santacesaria, R.
name: Valente, P.
name: Galluccio, F.
name: Afonin, A. G.
name: Bulgakov, M. K.
name: Chesnokov, Yu. A.
name: Maisheev, V. A.
name: Yazynin, I. A.
name: Kovalenko, A. D.
name: Taratin, A. M.
name: Gavrikov, Yu. A.
name: Ivanov, Yu. M.
name: Lapina, L. P.
name: Skorobogatov, V. V.
name: Ferguson, W.
name: Fulcher, J.
name: Hall, G.
name: Pesaresi, M.
name: Raymond, M.
name: Rose, A.
name: Ryan, M.
name: Zorba, O.
name: Robert-Demolaize, G.
name: Markiewicz, T.
name: Oriunno, M.
name: Wienands, U.
Publisher: name: arXiv
Year: 2011
Subjects: subject: Accelerator Physics (physics.acc-ph)
subject: FOS: Physical sciences

description: The UA9 experimental equipment was installed in the CERN-SPS in March '09 with the aim of investigating crystal assisted collimation in coasting mode. Its basic layout comprises silicon bent crystals acting as primary collimators mounted inside two vacuum vessels. A movable 60 cm long block of tungsten located downstream at about 90 degrees phase advance intercepts the deflected beam. Scintillators, Gas Electron Multiplier chambers and other beam loss monitors measure nuclear loss rates induced by the interaction of the beam halo in the crystal. Roman pots are installed in the path of the deflected particles and are equipped with a Medipix detector to reconstruct the transverse distribution of the impinging beam. Finally UA9 takes advantage of an LHC-collimator prototype installed close to the Roman pot to help in setting the beam conditions and to analyze the efficiency to deflect the beam. This paper describes in details the hardware installed to study the crystal collimation during 2010.
description: 15pages, 11 figure, submitted to JINST
On the Nilpotent Multiplier of a Free Product
Creators: name: Mashayekhy, Behrooz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20E06, 20F12, 20J10

description: In this paper, using a result of J. Burns and G. Ellis (Math. Z. 226 (1997) 405-28.), we prove that the $c$-nilpotent multiplier (the Baer-invariant with respect to the variety of nilpotent groups of class at most $c$, ${\cal N}_c$.) {\it does commute} with the free product of cyclic groups of mutually coprime order.
description: 11 pages
Superluminal, subluminal, and negative velocities in free-space electromagnetic propagation
Creators: name: Budko, Neil V.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Classical Physics (physics.class-ph)
subject: FOS: Physical sciences

description: In this Chapter the time-domain analysis of the velocity of the electromagnetic field pulses generated by a spatially compact source in free space is presented. Recent simulations and measurements of anomalous superluminal, subluminal, and negative velocities are discussed. It is shown that such velocities are local and instantaneous in nature and do not violate either causality or special relativity. Although these effects are mainly confined to the near- and intermediate-field zones, some of them seem paradoxical and still lack adequate physical interpretation.
description: This is an extended account (21 pages, 9 figures) of my previous work: PRL 102, 020401
TomograPy: A Fast, Instrument-Independent, Solar Tomography Software
Creators: name: Barbey, Nicolas
name: Guennou, Chloé
name: Auchère, Frédéric
Publisher: name: arXiv
Year: 2011
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: Applications (stat.AP)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Solar tomography has progressed rapidly in recent years thanks to the development of robust algorithms and the availability of more powerful computers. It can today provide crucial insights in solving issues related to the line-of-sight integration present in the data of solar imagers and coronagraphs. However, there remain challenges such as the increase of the available volume of data, the handling of the temporal evolution of the observed structures, and the heterogeneity of the data in multi-spacecraft studies. We present a generic software package that can perform fast tomographic inversions that scales linearly with the number of measurements, linearly with the length of the reconstruction cube (and not the number of voxels) and linearly with the number of cores and can use data from different sources and with a variety of physical models: TomograPy (http://nbarbey.github.com/TomograPy/), an open-source software freely available on the Python Package Index. For performance, TomograPy uses a parallelized-projection algorithm. It relies on the World Coordinate System standard to manage various data sources. A variety of inversion algorithms are provided to perform the tomographic-map estimation. A test suite is provided along with the code to ensure software quality. Since it makes use of the Siddon algorithm it is restricted to rectangular parallelepiped voxels but the spherical geometry of the corona can be handled through proper use of priors. We describe the main features of the code and show three practical examples of multi-spacecraft tomographic inversions using STEREO/EUVI and STEREO/COR1 data. Static and smoothly varying temporal evolution models are presented.
description: 21 pages, 6 figures, 5 tables
Additional file 1 of Health care providers’ knowledge of clinical protocols for postpartum hemorrhage care in Kenya: a cross-sectional study
Creators: name: Henry, Junita
name: Clarke-Deelder, Emma
name: Han, Dan
name: Miller, Nora
name: Opondo, Kennedy
name: Oguttu, Monica
name: Burke, Thomas
name: Cohen, Jessica L.
name: McConnell, Margaret
Publisher: name: figshare
Year: 2022
Subjects: subject: Medicine
subject: Biotechnology
subject: Sociology
subject: FOS: Sociology
subject: Cancer
subject: Science Policy
subject: Infectious Diseases
subject: FOS: Health sciences

description: Additional file 1. Sources for classifying domains.
Collector transfer between bubble and particle by collision
Creators: name: Yan, Haixing
Publisher: name: University of British Columbia
Year: 2016

description: The adsorption densities of dodecylamine hydrochloride at the quartz-liquid interface and at the bubble-liquid interface were measured in separate experiments using the solution depletion method. The amount of amine removed from solution by gas bubbles was measured by bubbling nitrogen through amine solutions of known concentrations and measuring the amount of amine remaining in solution. The obtained results were compared with the amount of dodecylamine depleted from solution under flotation conditions when three phases (solid, liquid, and gas) were present in the tested system. By analyzing the distribution of amine between the interfaces it was possible to identify the conditions (pH and amine concentration) leading to a transfer of amine between bubbles and quartz as a result of bubble-particle collisions. Two modes of interaction between amine and quartz were identified. In a true solution system (pH 6), it was found the surfactant could be transferred from gas bubbles to quartz particles only when the adsorption density of amine at the quartz-solution interface was relatively low, thus leaving space for additional amine adsorption, and the bubbles and the particles were oppositely charged in the presence of amine. Too high adsorption density, resulting in positively charged particles and bubbles largely prevented the amine transfer process. In a colloidal dispersion of amine (pH 11), the dynamic conditions of the flotation test actually seemed to lead to a lower amount of amine transferred to the froth zone than the theoretical amount calculated from adsorption on quartz and on bubbles. This result was attributed to the weak adhesion of the precipitate to the quartz particles and the detachment of the precipitate from both bubbles and quartz particles as bubbles coalesced and burst in the froth zone. Interaction with quartz and bubbles was further weakened by the lack of electrostatic attraction between the nearly uncharged colloidal precipitate and the negatively charged bubbles and particles. Experimental results supports the bubble transfer hypothesis (Digre and Sandvik, 1968) stating that under flotation conditions the adsorption of collector on solid surfaces is governed, to a large extent, by a transfer of collector from the gas-liquid interface to the solid surface.
Coupled channel approach to (S,I)=(-2,0) baryon-baryon interactions from lattice QCD
Creators: name:  Sasaki For HAL QCD Collaboration
Publisher: name: arXiv
Year: 2010
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: We investigate baryon-baryon interactions with strangeness $S=-2$ and isospin I=0 system from Lattice QCD. In order to solve this system, we prepare three types of baryon-baryon operators ($ΛΛ$, $NΞ$ and $ΣΣ$) for the sink and construct three source operators diagonalizing the $3\times3$ correlation matrix. Combining of the prepared sink operators with the diagonalized source operators, we obtain nine effective Nambu-Bethe-Salpeter (NBS) wave functions. The $3\times3$ potential matrix is calculated by solving the coupled-channel Schrödinger equation. The flavor SU(3) breaking effects of the potential matrix are also discussed by comparing with the results of the SU(3) limit calculation. Our numerical results are obtained from three sets of 2+1 flavor QCD gauge configurations provided by the CP-PACS/JLQCD Collaborations.
description: 3 pages, 1 figure, Talk given at the 21st European Conference on few-body problems in Physics (EFB21), Spain
KALSIY FOSFATNING BIOLOGIK XUSUSIYATLARI. SUYAK O'RNINI BOSUVCHI MODDALAR. EKSPERIMENTAL DALILLAR
Creators: name: Ilmiy tadqiqotchi Abdiravidov Temurbek Abdumannonovich Toshkent farmatsevtika instituti Farmatsiya fakulteti  farmatsiya yo'nalishi 2-kurs talabasi,
name: Muhamedova Busora Ibragimovna Analitik kimyo kafedrasi dotsenti, Toshkent farmatsevtika instituti
Publisher: name: Zenodo
Year: 2024

description: : Kalsiy fosfat, metabolizm, gomeostaz, endokrin tartibga solish, tashish, kasallik,  fosfat, biologik faol moddalar, suyak o’rnini bosuvchi moddalar, kompozit suyak o’rnini bosuvchi moddalar, suyak to’qimalarining muhandisligi, biologic faol shisha

Abstrakt

Suyak nuqsonlarini standart davolash - bu otologik suyak yordamida biologik rekonstruksiya - bu terapevtik yondashuv bo'lib, u cheklangan miqdor kabi cheklovlardan aziyat chekadi. Yig'ish uchun mavjud bo'lgan suyak va qo'shimcha aralashuv zarurati, keyinchalik donor joyida asoratlar paydo bo'lishi mumkin. Shu sababli, sintetik suyak o'rnini bosuvchi vositalar, payvandlash materiali sifatida otolog suyakdan foydalanishni kamaytirish yoki hatto almashtirish uchun ishlab chiqilgan. Ushbu tuzilgan sharh kalsiy fosfatlari va biologik faol ko'zoynaklar (BGs), ikkala o'rnatilgan suyak o'rnini bosuvchi materiallar CaP/BG kompozitlarida birlashganda yaxshilangan xususiyatlarni ko'rsatadimi degan savolga qaratilgan. Shuning uchun u umumiy biologik xususiyatlarni va ayniqsa, CaP/BG kompozit suyak o'rnini bosuvchi materiallarning osteogen xususiyatlarini shakllanishini kuchaytiradi. Yaxshiroq tushunish uchun eng so'nggi eksperimental ma'lumotlarni umumlashtiradi. Natijada, BGlar CaPlarga qo'shilganda in-vitroda prekursor hujayra populyatsiyalarining osteogenik farqlanishi uchun foydali bo'ladi. Bundan tashqari, BG mavjudligi CaP/BG kompozitlarini in-vivo suyakka integratsiyalashuvini qo'llab-quvvatlaydi va muayyan sharoitlarda suyak. Suyak nuqsonlarini ko'paytirish nafaqat ortopedik jarrohlikda, balki zamonaviy tibbiyotning umumiy kontekstida ham klinik jihatdan eng muhim protseduralarga tegishlidir. Har yili suyak transplantatsiyasi Qo'shma Shtatlarda qon quyishdan keyin ikkinchi eng ko'p bajariladigan to'qimalar transplantatsiyasi hisoblanadi [1]. Suyak nuqsonlarini tuzatishning hozirgi oltin standarti asosan yonbosh suyagidan olinadigan autolog suyak payvandi bo'lib qolmoqda [2]. Suyakning bu biologik rekonstruksiyasi suyak to'qimasini muhandislik deb ta'riflanadi [3]. Shu bilan birga, nuqsonlarni davolash va autolog to'qimalardan foydalangan holda suyak to'qimasini muhandislik qilish nafaqat mavjud suyak moddasi bilan cheklanib qolmaydi, balki jarrohlik joyidagi asoratlarni keltirib chiqarishi mumkin bo'lgan ikkinchi aralashuvni ham talab qiladi [4,5]. Shu sababli, otolog suyak iligidan payvandlash materiali sifatida foydalanishni cheklashi yoki hatto o'rnini bosishi mumkin bo'lgan sintetik suyak o'rnini bosuvchi moddalarni ishlab chiqish, baholash va ishlab chiqarish eksperimental va klinik ortopedik tadqiqotlarning diqqat markazida.
Characterization of Kepler early-type targets
Creators: name: Catanzaro, G.
name: Frasca, A.
name: Molenda-Zakowicz, J.
name: Marilli, E.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: Stellar pulsation offers a unique opportunity to constrain the intrinsic parameters of stars and unveil their inner structure. The Kepler satellite is collecting an enormous amount of data of unprecedent photometric precision, which will allow us to test theory and obtain a very precise tomography of stellar interiors. We attempt to determine the stars' fundamental parameters Teff, log g, v sin i, and luminosity needed for computing asteroseismic models and interpreting Kepler data. We report spectroscopic observations of 23 early-type Kepler asteroseismic targets, 13 other stars in the Kepler field, that had not been selected to be observed. We measured the radial velocity by performing a cross-correlation with template spectra to help us identify non-single stars. Spectral synthesis was performed to derive the stellar parameters of our target stars, and the state-of-the-art LTE atmospheric models were computed. For all the stars of our sample, we derived the radial velocity, Teff, log g, v sin i, and luminosities. For 12 stars, we performed a detailed abundance analysis of 20 species, for 16, we could derive only the [Fe/H] ratio. A spectral classification was also performed for 17 stars in the sample. We identify two double-lined spectroscopic binaries, HIP96299 and HIP98551, the former of which is an already known eclipsing binary, and two single-lined spectroscopic binaries, HIP 97254 and HIP 97724. We also report two suspected spectroscopic binaries, HIP92637 and HIP96762, and the detection of a possible variability in the radial velocity of HIP 96277. Two of our program stars are chemically peculiar, namely HIP93941, which we classify as B2 He-weak, and HIP96210, which we classify as B6 HgMn. Finally, we find that HIP93522, HIP93941, HIP93943, HIP96210 and HIP96762, are very slow rotators which makes them very interesting and promising targets for asteroseismic modeling.
description: 9 pages, 3 figures, 6 tables
Dissipation scales of kinetic helicities in turbulence
Creators: name: Lessinnes, T.
name: Plunian, F.
name: Stepanov, R.
name: Carati, D.
Publisher: name: arXiv
Year: 2010
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: A systematic study of the influence of the viscous effect on both the spectra and the nonlinear fluxes of conserved as well as non conserved quantities in Navier-Stokes turbulence is proposed. This analysis is used to estimate the helicity dissipation scale which is shown to coincide with the energy dissipation scale. However, it is shown using the decomposition of helicity into eigen modes of the curl operator, that viscous effects have to be taken into account for wave vector smaller than the Kolomogorov wave number in the evolution of these eigen components of the helicity.
description: 6 pages, 2 figures, submited to PoF
Labor Market Institutions and Firm Policy - Theoretical and Experimental Insights
Creators: name: Paul, Christian
Publisher: name: Karlsruhe
Year: 2009
Subjects: minimum wage
employment protection
sanctions
experimental economics

description: In this thesis, we theoretically and experimentally analyze three aspects of labor markets. We first ask whether the introduction of a minimum wage not only increases the wages of workers who previously earned less than this minimum wage, but also of those who earned considerably more already. Then, the interplay of employment protection and bullying of workers is investigated. Finally, the layoff policies of firms operating highly profitable and less profitable, respectively, are analyzed.
Some Notes on the Baer Invariant of a Nilpotent Product of Groups
Creators: name: Mashayekhy, Behrooz
Publisher: name: arXiv
Year: 2011
Subjects: subject: Group Theory (math.GR)
subject: FOS: Mathematics
subject: 20F12, 20F18, 20K25

description: W.Haebich (Bull. Austral. Math. Soc., 7, 1972, 279-296) presented a formula for the Schur multiplier of a regular product of groups. In this paper first, it is shown that the Baer-invariant of a nilpotent product of groups with respect to the variety of nilpotent groups has a homomorphic image and in finite case a subgroup of Haebich's type. Second a formula will be presented for the Baer-invariant of a nilpotent product of cyclic groups with respect to the variety of nilpotent groups.
description: 13 pages
Trends to equilibrium for a class of relativistic diffusions
Creators: name: Angst, Jürgen
Publisher: name: arXiv
Year: 2011
Subjects: subject: Probability (math.PR)
subject: Mathematical Physics (math-ph)
subject: FOS: Mathematics
subject: FOS: Physical sciences
subject: 60J60, 83A05, 26D10

description: We address the question of the trends to equilibrium for a large class C of relativistic diffusions. We show the existence of a spectral gap using the Lyapounov method and deduce the exponential decay of the distance to equilibrium in L2-norm and in total variation. A similar result was obtained recently in arXiv:1009.5086 for a particular process of the class C.
description: 10 pages
Annual greenhouse gas budget for a bog ecosystem undergoing restoration by rewetting
Creators: name: Lee, Sung-Ching
Publisher: name: University of British Columbia
Year: 2016

description: Many peatlands have been drained and harvested for peat mining, which turned those landscapes into carbon (C) emitters. Rewetting of disturbed peatlands facilitates their ecological recovery, and may help them revert to carbon dioxide (CO₂) sinks. However, it may also cause substantial emissions of the powerful greenhouse gas (GHG) methane (CH₄). Our knowledge on year-round measurements of CO₂ and CH₄ fluxes in restored peatlands is currently very limited. This study quantifies C exchanges in a disturbed and rewetted area located in the Burns Bog Ecological Conservancy Area (BBECA) in Delta, BC, Canada. The BBECA is recognized as the largest raised bog ecosystem on North America’s West Coast. It was substantially reduced in size and degraded by peat mining and agriculture. Since 2005, the bog has been declared a conservancy area, and restoration efforts focus on rewetting disturbed ecosystems to recover Sphagnum and suppress fires. Year-round (16th June 2015 to 15th June 2016) turbulent fluxes of CO₂ and CH₄ were measured from a tower platform in an area rewetted in 2007 using the eddy-covariance (EC) technique. The annual CO₂ budget was -179 g CO₂-C m-² year-¹ and the annual CH₄ budget was 16 g CH₄-C m-² year-¹. Gross ecosystem productivity (GEP) exceeded ecosystem respiration (Re) during summer months (June-August), causing a net CO₂ uptake. In summer, high CH₄ emissions were measured. In winter (December-February), substantially lower CH₄ emissions and roughly equal magnitudes of GEP and Re made the bog C neutral. Oxygen limitation due to the high water table caused by ditch blocking suppressed Re. With low temperatures in winter, CH₄ emission was more suppressed than Re. The key environmental factors controlling the seasonality of these exchanges in the study area were downwelling photosynthetically active radiation and 5-cm soil temperature. Annual net GHG flux from CO₂ and CH₄ during the study period totaled to -23.48 g CO₂e m-² year-¹ and 1242.04 g CO₂e m-² year-¹ by using 100-year and 20-year global warming potential (GWP) values, respectively. Consequently, the ecosystem was almost CO₂e neutral annually on a 100-year time horizon but was a significant CO₂e source on a 20-year time horizon.
Damping in quantum love affairs
Creators: name: Bagarello, Fabio
Publisher: name: arXiv
Year: 2011
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Chaotic Dynamics (nlin.CD)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: In a series of recent papers we have used an operatorial technique to describe stock markets and, in a different context, {\em love affairs} and their time evolutions. The strategy proposed so far does not allow any dumping effect. In this short note we show how, within the same framework, a strictly non periodic or quasi-periodic effect can be introduced in the model by describing in some details a linear Alice-Bob love relation with damping.
description: in press in Physica A
A phenomenological investigation of motivational deficits in chronic schizophrenia
Creators: name: Jaramillo, Justin R.
Publisher: name: No Publisher Supplied
Year: 2011

description: The present study consists of a qualitative examination of motivational deficits in patients with chronic schizophrenia. In addition to persistent difficulties with motivation, all participants exhibited prominent negative symptoms. The complicated relationship between the negative symptom classification and motivation was discussed. The study included 12 male subjects, ages 27-57, who were recruited from two outpatient day treatment programs for people with chronic mental illness. Data was gleaned via semi-structured interviews and analyzed using qualitative data analytic methodology. Results indicated that, despite outward appearances and observed behaviors (e.g., the appearance of indifference often interpreted from the presence of flat affect,limited social/vocational activity, minimal efforts to initiate socialization,frequent premature discontinuation of social interaction, limited occupational seeking, etc.), the individuals involved in this study indicated that theydesire sustained social relationships and were interested in engaging in some degree of gainful employment. A number of factors were identifiedin subject reports as contributing to motivational impairment, particularly in the areas of socialization and occupational functioning: difficulty understanding the interpersonal dynamics of goal pursuit; the prominence of a poor sense of self-efficacy and associated beliefs that undermine goal accomplishment; stigmatization as a perceived obstacle to socialization and employment; and anxiety/stress that appeared to interfere with goal-oriented planning and behaviors. In light of the presence of favorable psychological attitudes towards interpersonal relationships and work, the subjects in this study appeared primed for interventions that may tap into their intrinsic interests and help to attenuate the influence of factors that may contribute to chronic motivational diminishment. In particular, treatments targeting maladaptive cognitions and negative affect within a framework of social guidance and support were suggested as potentially facilitating the amelioration of poor motivation in this population.
Axion-like-particle search with high-intensity lasers
Creators: name: Döbrich, Babette
name: Gies, Holger
Publisher: name: arXiv
Year: 2010
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study ALP-photon-conversion within strong inhomogeneous electromagnetic fields as provided by contemporary high-intensity laser systems. We observe that probe photons traversing the focal spot of a superposition of Gaussian beams of a single high-intensity laser at fundamental and frequency-doubled mode can experience a frequency shift due to their intermittent propagation as axion-like-particles. This process is strongly peaked for resonant masses on the order of the involved laser frequencies. Purely laser-based experiments in optical setups are sensitive to ALPs in the $\mathrm{eV}$ mass range and can thus complement ALP searches at dipole magnets.
description: 25 pages, 2 figures
A Mobile Application for Smart House Remote Control System
Creators: name: Rajabzadeh, Amir
name: Manashty, Ali Reza
name: Jahromi, Zahra Forootan
Publisher: name: arXiv
Year: 2010
Subjects: subject: Other Computer Science (cs.OH)
subject: FOS: Computer and information sciences
subject: J.7
subject: 93C95

description: At the start of the second decade of 21th century, the time has come to make the Smart Houses a reality for regular use. The different parts of a Smart House are researched but there are still distances from an applicable system, using the modern technology. In this paper we present an overview of the Smart House subsystems necessary for controlling the house using a mobile application efficiently and securely. The sequence diagram of the mobile application connecting to the server application and also the use-cases possible are presented. The challenges faced in designing the mobile application and illustrating the updated house top plane view in that application, are discussed and solutions are adapted for it. Finally the designed mobile application was implemented and the important sections of it were described, such as the interactive house top view map which indicates the status of the devices using predefined icons. The facilities to manage the scheduled tasks and defined rules are also implemented in this mobile application that was developed for use in Windows Mobile platform. This application has the capability of connecting to the main server using GPRS mobile internet and SMS. This system is expected to be an important step towards a unified system structure that can be used efficiently in near future regular houses.
description: 7 pages, 8 figures, Keywords-Smart House, Mobile Application, Remote Control, Automated Home, Windows Mobile