cssi/SciSciGPT-SciSciNet huggingface dataset:
DIAGNOSIS AND TREATMENT OF IATROGENIC FEMORAL ARTERY PSEUDOANEURYSM : A REVIEW

A pseudoaneurysm is a pulsatile hematoma that communicates with an artery through a disruption in the arterial wall. Femoral pseudoaneurysm is a common complication of invasive procedures. It occurs in 0.1% to 0.2% of diagnostic angiograms and 3.5% to 5.5% of interventional procedures. Longer procedures, large-bore catheters, anticoagulation, and a faulty lower site of puncture are associated with a higher incidence of femoral pseudoaneurysm. Pseudoaneurysms are associated with the characteristic findings of a pulsatile mass, a palpable thrill, and an audible to-and-fro murmur. The diagnosis is confirmed by imaging of the pseudoaneurysm. A femoral arterial duplex study is the diagnostic imaging modality of choice. It can show the pseudoaneurysm, the degree of clotting, the communication with the femoral artery, and the blood flow velocity pattern within the artery, the communication, and the pseudoaneurysm. Small (less than 2 cm) femoral pseudoaneurysms clot spontaneously and usually require no treatment. Larger femoral pseudoaneurysms may lead to complications including rupture and compression of the adjacent femoral vein (with resulting venous thrombosis) or of the femoral nerve. Treatment may be surgical. However, recently it has been shown that direct, noninvasive compression of the pseudoaneurysm stops the blood flow in the communication and leads to pseudoaneurysm clotting and obliteration.
First responders: problems and solutions: tactical information

Abstract The National Institute of Standards and Technology performs research that when applied can reduced the fire losses in the U.S. A focus of the research is on advanced technology for the first responder. Currently means are being explored to enhance the information available to first responders, by creating standards for transmission, display and use of information from building emergency systems that are compatible with GIS databases. Research is being conducted on new sensors and signal analysis that can detect impending collapse of buildings. New technology for reliable voice and data communications are being evaluated.
Chromsomes and DNA-replication of rat kangaroo cells (PtK 2 ).

The karyotype, chromosomal measurements, and the time course of DNA replication during the S-phase were determined in metaphase chromosomes of non-synchronized monolayer cultures of PtK2 cells (CCL 56) derived from Potorous tridactylis. The karotype was the same as originally determined for this cell line. Chromosomal measurements differed from data for primary bone marrow cells of this species published by Shaw and Krooth. PtK2 cells and chromosomes showed maximal incorporation of tritiated thymidine (3H-TdR) halfway through the S-phase. Chromosome Y1 showed a second peak of 3H-TdR-incorporation at the end of the S-phase in addition to the peak halfway through S. Comparison of grain densities for chromosomal arms showed late replication of the short arms of chromosomes 1, 3, and X. The time course of incorporation of 3H-TdR was changed when cells were treated for 1 h with fluorodeoxyuridine (FUdR) prior to the 3H-TdR-pulse. FUdR-treated cells showed maximum incorporation of 3H-TdR immediately after the beginning of the S-phase, which was followed by a second peak halfway through the S-phase. This indicated that 3H-TdR-incorporation was partially synchronized by treatment of cells with FUdR. Total radioactivity of FUdR-treated cells had increased by 77% in comparison to cells not treated with FUdR, which indicates that approximately 44% of the TdR-precursors of the latter cells may have originated from cellular precursor pools.
Mapping invasive aquatic vegetation in the Sacramento-San Joaquin Delta using hyperspectral imagery.

The ecological and economic impacts associated with invasive species are of critical concern to land managers. The ability to map the extent and severity of invasions would be a valuable contribution to management decisions relating to control and monitoring efforts. We investigated the use of hyperspectral imagery for mapping invasive aquatic plant species in the Sacramento-San Joaquin Delta in the Central Valley of California, at two spatial scales. Sixty-four flightlines of HyMap hyperspectral imagery were acquired over the study region covering an area of 2,139 km2 and field work was conducted to acquire GPS locations of target invasive species. We used spectral mixture analysis to classify two target invasive species; Brazilian waterweed (Egeria densa), a submerged invasive, and water hyacinth (Eichhornia crassipes), a floating emergent invasive. At the relatively fine spatial scale for five sites within the Delta (average size 51 ha) average classification accuracies were 93% for Brazilian waterweed and 73% for water hyacinth. However, at the coarser, Delta-wide scale (177,000 ha) these accuracy results were 29% for Brazilian waterweed and 65% for water hyacinth. The difference in accuracy is likely accounted for by the broad range in water turbidity and tide heights encountered across the Delta. These findings illustrate that hyperspectral imagery is a promising tool for discriminating target invasive species within the Sacramento-San Joaquin Delta waterways although more work is needed to develop classification tools that function under changing environmental conditions.
A joint-design approach for extended depth of field imaging

We present a joint-design approach to extended depth of field imaging within the computational imaging framework. Superior performance of the optimized Zernike phase-mask, relative to cubic and trefoil phase-masks is demonstrated by simulation and experiment.
Measurement Reconstruction Approach for Distributed Multisensor Fusion

There have been several algorithms proposed for multisensor tracking of multiple objects using a centralized processing architecture, but because of considerations such as reliability, survivability, and communication bandwidth, distributed processing architectures are often the only alternative. The distributed fusion problem is more complex than the centralized fusion problem because of correlation across track estimates for the same object. We propose an approach for distributed sensor fusion that bypasses this correlation problem and allows previously developed centralized fusion methods to be employed after a measurement reconstruction procedure. Limitations and assumptions are discussed, and simulation results are presented to demonstrate the performances obtained with this approach.
Modern treatment of avulsed teeth by emergency physicians

New research has shown that the incidence of success of replanted avulsed teeth can be greatly increased by differentially diagnosing and treating them according to the length of extraoral time and the physiological width of the apical foramen. A specific treatment regimen has been presented that will give the physician the information necessary to maximize the success of replanted avulsed teeth that may be seen.
Trade promotion and SME export performance

Abstract In this paper, we attempt to further develop an international resource-based view of small and medium-sized enterprises (SMEs) by examining the effectiveness of a set of export promotion services. Specifically, we investigate the impact of US state-sponsored export promotion activities on the international marketing efforts of small to medium-sized enterprises. We hypothesize and find that, even after controlling for internal firm resources, the use of trade shows and programs identifying agents and distributors contribute positively to SME satisfaction with export performance. Managerial implications are discussed.
Theoretical strength of a perfect crystal in a state of simple shear

A theoretical study was made of the lattice stability or theoretical strength of fcc crystals subjected to a particular mode of simple unconstrained shear. Numerical calculations were made for crystals with two-body exponentially attractive and exponentially repulsive interatomic interactions. The results of calculations were not very sensitive to the detailed nature of the atomic potentials, providing that the theoretical values of the stress-free elastic moduli ${C}_{11}$ and ${C}_{12}$ and lattice parameter of the crystal were kept invariant when the detailed nature of the atomic potentials was changed. The results exhibited a variety of interesting behaviors, including the existence of two distinct nonintersecting branches of equilibrium solutions, one of which was a closed path, and both of which contained regions in which the crystal was stable and in which the crystal was unstable. The numerical values of stress and strain at the onset of lattice instability compared well with experimental values of maximum stresses and strains which have been observed for fine metallic whiskers, reinforcing the belief that both the theoretical and the experimental values of stress and strain at failure are quite close to the "theoretically ultimate" values.
Effect of Tool Pin Thread Forms on Friction Stir Weldability of Different Aluminum Alloys

Abstract The primary objective of this study is to investigate parametric effects of pin features on material flow and friction stir weldability of two different aluminum alloys. A series of bead on plate friction stir welds were made on two different aluminum alloys (AA 7050 and AA6061) with cylindrical tool pin having four thread pitches (1.02 mm, 1.41 mm, 2.12 mm & 3.18 mm) including smooth/unthreaded pin attached to an unvarying single scrolled shoulder geometry. Welds were performed under a range of process parameters (welding & rotational speed). It was observed that thread forms are obviously beneficial for improving tool performance and reducing in-plane reactions (X & Y forces) forces on tool. Wormhole defects in the weld nugget were eliminated or minimized by employing threaded pins as a consequence of effective material transportation near the weld root. Tool pins having intermediate thread pitches (1.41 mm and 2.12 mm) perform better than either extreme over the range of attempted parameters. Defects are far more prevalent in 7050 welds than in 6061. In-plane reaction forces on pin are significantly larger in AA7050 welds than in AA 6061 and torque- peak temperature values are of similar order in both welded materials.
Work function changes due to the chemisorption of water and oxygen on aluminum

Abstract On exposure to dry oxygen the work function of aluminum is observed to decrease with increasing fractional monolayer coverage reaching a minimum value of about 0.05 V below the fresh surface value at monolayer coverage before increasing with further oxygen exposure. This unusual insensitivity of the work function to oxygen coverage is explained on the basis of a two-site chemisorption model involving dissociation of the O2 on adjoining sites and a place exchange of one of the oxygen atoms with an underlying aluminum atom. The initial oxygen kinetics are consistent with either a homogeneous model or a heterogeneous model of activated chemisorption, but the latter model is favored as the correct explanation. Water vapor lowers the work function of both the fresh surface and an oxygen exposed surface about 1 eV. The 1 eV lowering is consistent with the polar nature of water assuming either H2O or OH groups chemisorbed on the metal oxide surface with the hydrogen outward. Microbalance and work function data indicate that water initially reacts with a fresh metal surface to produce a monolayer of oxide before forming the hydrogen outward dipole layer.
A Further Examination of Validity for the Sexual Experiences Survey

The Sexual Experiences Survey (SES) is designed to identify victims of sexual assault, including ones whose experiences meet the Ohio legal definitions (Ohio Revised Code, 1980) for rape or attempted rape (Koss, Gidycz, and Wisniewski, 1987). Ratings from 156 Ohio prosecuting attorneys indicate that three of the five items used to identify victims of rape or attempted rape as a result of actual or threatened force are commensurate with the sex offense statutes for these acts, while the two questions describing attempted and completed rape experiences involving the use of drugs and alcohol are not. The ratings could not be accounted for by demographic, work experience, or rape myth acceptance variables. Two additional items not intended to measure specific code violations were found to describe felony sex offenses. The implications of the current findings for identifying sexual assault victims are discussed.
Conformation of histidine model peptides. II. Spectroscopic properties of the imidazole chromophore.

Synopsis Semi-empirical molecular orbital calculations have been carried out for the free base and cationic forms of iinidazole so as to obtain data which are required for the calculation of t.he chiroptical properties of molecules that contain this chromophoric group. The polarization, energy, and monopolar charge distribution are reported for the lowest energy electronic transitions. The absorption spectra for imidazole have been determined to 180 nm and circular dichroism spectra for Lhisitidinol and L2-amino-1-butanol have been measured.
Visual function in infants with brain lesions (1994)

Another in our series of commentaries on notable papers from the DMCN archives. The full paper is available at http://www.mackeith.co.uk Pike MG, Holmstrom G, de Vries LS, Pennock JM, Drew KJ, Sonksen PM, Dubowitz LM. Patterns of visual impairment associated with lesions of the preterm infant brain. Dev Med Child Neurol 1994; 36: 849–62.
Improved signal to noise in high-resolution magic angle spinning total correlation spectroscopy studies of prostate tissues using rotor-synchronized adiabatic pulses

A rotor-synchronized WURST-8 adiabatic pulse scheme was compared to the conventional MLEV-17 hard pulse scheme for isotropic mixing in total correlation spectroscopy (TOCSY) studies of intact human prostate tissues under high-resolution magic angle spinning (HR-MAS) conditions. Both mixing schemes were extremely sensitive to the rotational resonance condition and dramatic reductions in signal to noise were observed when pulse durations deviated from 1/(spin rate). A significant increase in cross-peak intensities was observed using rotor-synchronized WURST-8 adiabatic pulses versus those observed using the rotor-synchronized MLEV-17 hard pulse scheme in both solution and tissue. In tissue, absolute signal intensities ranged from 1.5× to 10.5× greater (average: 4.75×) when WURST-8 was used in place of MLEV-17. Moreover, the difference was so dramatic that several metabolite cross peaks observed using WURST-8 pulses were not observed using MLEV-17 pulses, including cross peaks corresponding to many of the choline- and ethanolamine-containing metabolites. Due to the complex modulation of TOCSY cross peaks for multiply coupled spins and the shorter T2 relaxation times of tissue metabolites, maximum cross-peak intensities occurred at shorter mixing times than predicted by theory. In summary, a WURST-8 adiabatic mixing scheme produced significantly greater absolute cross-peak signal intensities than MLEV-17 hard pulse mixing, and maximum cross-peak intensity versus mixing time must be established for specific spin systems and T2 relaxation times. Magn Reson Med 53:41–48, 2005. © 2004 Wiley-Liss, Inc.
Volume holographic gratings using PQ/PMMA for angledepth-wavelength filters

In this paper, we use angle multiplexing with in-plane reference beams to make gratings using PQ/PMMA. The hologram is applied to spectral-spatial imaging systems as a filter to obtain the depth sections of an object.
Associated point defects in II–VI compounds

Recently, the structures of many associates of point defects in the II–VI compounds have been determined. The status of present knowledge is reviewed with emphasis on the arguments leading to models for the various associates.
Eukaryotic Initiation Factor (eIF) 1 Carries Two Distinct eIF5-binding Faces Important for Multifactor Assembly and AUG Selection

Eukaryotic initiation factor (eIF) 1 is a small protein (12 kDa) governing fidelity in translation initiation. It is recruited to the 40 S subunit in a multifactor complex with Met-tRNA(i)(Met), eIF2, eIF3, and eIF5 and binds near the P-site. eIF1 release in response to start codon recognition is an important signal to produce an 80 S initiation complex. Although the ribosome-binding face of eIF1 was identified, interfaces to other preinitiation complex components and their relevance to eIF1 function have not been determined. Exploiting the solution structure of yeast eIF1, here we locate the binding site for eIF5 in its N-terminal tail and at a basic/hydrophobic surface area termed KH, distinct from the ribosome-binding face. Genetic and biochemical studies indicate that the eIF1 N-terminal tail plays a stimulatory role in cooperative multifactor assembly. A mutation altering the basic part of eIF1-KH is lethal and shows a dominant phenotype indicating relaxed start codon selection. Cheung et al. recently demonstrated that the alteration of hydrophobic residues of eIF1 disrupts a critical link to the preinitiation complex that suppresses eIF1 release before start codon selection (Cheung, Y.-N., Maag, D., Mitchell, S. F., Fekete, C. A., Algire, M. A., Takacs, J. E., Shirokikh, N., Pestova, T., Lorsch, J. R., and Hinnebusch, A. (2007) Genes Dev. 21, 1217-1230 ). Interestingly, eIF1-KH includes the altered hydrophobic residues. Thus, eIF5 is an excellent candidate for the direct partner of eIF1-KH that mediates the critical link. The direct interaction at eIF1-KH also places eIF5 near the decoding site of the 40 S subunit.
Complete resolution of hyperfine structure in the close doublet λ5930.6 of 139 La by laser-atomic-beam spectroscopy*

The fluorescence excited in a 139La atomic beam by a single-frequency dye laser in the region of 5930.6 A has been examined with Doppler-free geometry. The two lines are separated by 0.07 A, are entirely distinct, and 29 of the 30 hfs components are resolved. Computer fits to the observed hyperfine structure yield values for the dipole and quadrupole hfs constants of the upper 2F5/2,7/2 states.
Photoelastic investigation of bolted joints in composites

Abstract In this paper, the methods of photo-orthotropic elasticity are applied to the study of bolted joints in composites. The photoelastic models are E-glass fibre-reinforced epoxy strips loaded through a cylindrical pin, simulating bolt loading without lateral pressure. A special loading arrangement is devised so that the photoelastic response around the hole is not obscured. Quasi-isotropic and unidirectionally-reinforced specimens are tested, with ratios of end distance to hole diameter varying from 2 to 6. Photoelastic isochromatic fringe patterns are presented along with the shear stress distribution for the quasi-isotropic models.
Quantifying the Fibre Effect on Gas Holdup in a Co‐Current Air‐Water‐Fibre Bubble Column

Fibre type and mass fraction have significant effects on gas holdup in gas-liquid-fibre bubble columns. An experimental study is introduced to identify a parameter that simultaneously characterizes the fibre type and mass fraction effects on gas holdup in gas-liquid-fibre bubble columns. This parameter satisfies the following condition: when this parameter is constant, the gas holdup trend in different fibre suspensions is generally similar at most operating conditions. A method is proposed to identify a characterization parameter by combining the crowding factor and fibre number density. The identified parameter is Ic=1n(Nc0.8Nf0.2). This parameter can be used to model gas holdup in gas-liquid-fibre bubble columns and quantitatively compare the fibre effects in different fibre suspensions. Le type de fibre et la fraction massique ont des effets significatifs sur la retention de gaz dans les colonnes a bulles gaz-liquide-fibres. On presente une etude experimentale pour determiner un parametre qui caracterise simultanement les effets du type de fibre et de la fraction massique sur la retention de gaz dans des colonnes a bulles gaz-liquide-fibres. Ce parametre repond a la condition suivante : lorsque ce parametre est constant, la tendance de la retention de gaz dans differentes suspensions de fibres est generalement similaire pour la plupart des conditions operatoires. On propose une methode pour determiner un parametre de caracterisation en combinant le facteur d'entassement et la masse volumique des differentes fibres. Le parametre identifie est Ic = 1n(Nc0.8Nf0.2). Ce parametre peut servir a modeliser la retention de gaz dans les colonnes a bulles gaz-liquide-fibres et comparer quantitativement les effets des fibres dans differentes suspensions de fibres.
Keeping the ‘Lady’ Safe: The Regulation of Femininity through Crime Prevention Literature

Rape and the fear of rape have been understood by numerous feminists as an ideological weapon used by men to subordinate women. This paper argues that this analysis of power is overly reductive. The omnipresent threat of rape for women encourages them to engage in multiple ‘safe-keeping’ acts which have come to be a performative condition of normative femininity. These restrictive bodily acts (not dressing in certain ways, avoiding certain public locales) promoted through some strands of rape prevention literature, are not merely a reaction to the reality of rape, rather, these advisory narratives unwittingly operate to install rape as a fixed reality. Rape prevention literature (re)produces gendered bodies – the vulnerable/indefensible feminine and the potent/unstoppable masculine – which does not disrupt the possibility of rape, more exactly, it makes rape seem evermore inevitable and unstoppable.
Provenance of the Pythian Cave conglomerate, northern California: implications for mid-Cretaceous paleogeography of the U.S. Cordillera

Abstract Provenance analysis of middle Cretaceous sedimentary rocks can help distinguish between disparate tectonic models of Cretaceous Cordilleran paleogeography by establishing links between sediment and source, as well as between currently separated basins. This study combines new detrital zircon age data and compositional data with existing provenance data for the Pythian Cave conglomerate, an informally-named unit deposited unconformably on the eastern Klamath Mountains, to test possible correlations between the Pythian Cave conglomerate and similar-age deposits in the Hornbrook Formation and the Great Valley Group. These provenance results indicate that restoring Late Cretaceous clockwise rotation of the Blue Mountains adds a significant sediment source for Cretaceous basins previously associated with only the Klamath Mountains (e.g., the Pythian Cave conglomerate and Hornbrook Formation) or a combined Klamath-Sierran source (e.g., Great Valley Group). Comparison of the Pythian Cave conglomerate with the Klamath River Conglomerate and the Lodoga petrofacies suggests that the Pythian Cave conglomerate system was separate from the nearby Hornbrook Formation and was probably related to the Lodoga petrofacies of the Great Valley Group.
Botulinum neurotoxin for pharyngeal constrictor muscle spasm in tracheoesophageal voice restoration.

Objectives/Hypothesis The purpose of the study was to evaluate the effectiveness of Botulinum neurotoxin (Botox) for elimination of pharyngeal constrictor muscle spasm in tracheoesophageal voice restoration. Study Design A retrospective review was made of 62 patients between 1991 and 2002 who had Botox as the initial treatment for pharyngeal constrictor muscle spasm. Methods One hundred units of Botox properly diluted in 3 mL saline was instilled unilaterally under electromyographic guidance after fluoroscopic identification and marking of the contracted pharyngeal constrictor muscles. The patients were divided into three groups based on their response to the first Botox injection: group I, complete relaxation of the pharyngeal constrictors resulting in fluent voice, intratracheal phonation pressure of 20 to 40 cm H2O, and the ability to say 15 to 20 uninterrupted syllables; group II, hypertonic or incomplete relaxation of the pharyngeal constrictors resulting in intratracheal phonation pressure of 45 to 70 cm H2O and the ability to say 7 or 8 syllables; and group III, failure to produce relaxation of the pharyngeal constrictors. Results After the first injection of Botox, 49 (79%) patients were in group I or II (41 in group I and 8 in group II) and group III consisted of 13 patients. Thirty-four patients (55%) had group I (28) or II (6) responses for greater than 6 months. A second Botox injection enabled 6 of the 13 failures to move into group I. In all, 8 pharyngeal constrictor muscle myotomies (13%) were ultimately required in the 62 patients. The group I speaker for the longest period has enjoyed 11 years of fluency and successful daily use of a tracheostoma valve after two Botox injections. Conclusion Botox relaxation of the pharyngeal constrictor muscles has proven to be effective, has replaced secondary pharyngeal myotomy for the initial treatment of pharyngeal muscle spasm, and is the only treatment in patients who are not candidates for elective surgery. Radiographic assessment, electromyographically monitored injection, and the number of Botox units appear to be important to successful outcomes.
A network theorem dual to Miller's theorem

Miller's theory is an important tool commonly used in analysis and design of amplifiers with voltage-shunt feedback. A network theorem is presented and proved to be dual to Miller's theorem; it can be utilized in the analysis and design of amplifiers with current-series feedback. Three examples are given to illustrate the applicability of the theorem. >
ANGIOMYOLIPOMA OF THE LEFT URETEROVESICAL JUNCTION ASSOCIATED WITH IPSILATERAL RENAL AGENESIS

To our knowledge we report the first case of retroperitoneal angiomyolipoma located at the left ureterovesical junction associated with ipsilateral renal agenesis. Radiologically, the mass had the characteristics of a cystic soft tissue tumor. Final diagnosis was determined by histopathological examination, which revealed the specific characteristics of angiomyolipoma. The tumor is theorized to be a result of developmental malformation of fetal mesenchymal elements along the ureteral bud during fetal development since it was associated with ipsilateral renal agenesis.
Expected Mobility: Part of the Prepayment Puzzle

This research combines information on mortgage terminations with housing market data to distinguish borrowers who prepay their mortgages because they are moving from those who prepay to refinance without moving. It uses a closed-form valuation formula to compute the callable value of the mortgage and property level data to estimate current loan-to-value ratios. Results show that expected mobility affects borrower behavior in an asymmetric fashion. Borrowers with high expected mobility are less likely to refinance, but borrowers with strong refinancing incentives are not more likely to move. Differentiating movers from refinancers provides a clearer picture of the responsiveness of prepayments to interest rate movements.
Warm shock consolidation of IN 718 powder

Explosive consolidation of the rapidly-solidified nickel-base super-alloy powder IN 718 was successfully accomplished. The effects of explosive type, explosive-to-powder mass ratio, powder container material and thickness, type of confinement, shielding material, and preheating temperature were investigated. Conditions for satisfactory consolidation, with good mechanical properties and low microcrack density, were established. The best consolidation was achieved by using a double-tube design in which a flyer tube was explosively accelerated, impacting the (cylindrical) powder container. The powder was pre-heated at 525° C and the initial consolidation pressure was calculated to be 18 GPa, resulting in approximately 20% apparent interparticle melting (white-etching regions between particles). The quality of the consolidates was evaluated by optical and electron microscopy, and by tensile testing.[/p]
STRUCTURAL BASIS FOR THE MULTIPLE FUNCTIONS OF SECRETORY COMPONENT

Secretory component (SC) plays a central role in the mucosal immune system. This polypeptide serves as the epithelial cell receptor and transporter for polymeric IgA (pIgA) and protects IgA from proteolysis. To evaluate the structural basis for these functions, we produced a large panel of monoclonal antibodies to human free SC (FSC) and SC bound to secretory IgA (bSC). We examined the reactivity of these antibodies with FSC, bSC and reduced and alkylated sIgA (R-A sIgA) by ELISA, and to membrane SC on a colon carcinoma cell line (HT29) by immunofluorescence.
Tracking the output of a poorly known markov process

Tracking the output of an unknown Markov process with unknown generator and unknown output function is considered. It is assumed the unknown quantities have a known prior probability distribution. It is shown that the optimal control is a linear feedback in the tracking error plus the conditional expectation of a quantity involving the unknown generator and output function of the Markov process. The results also have application to Bayesian identification of hidden Markov models
The Circular Flow of Exchange Value and the Linear Throughput of Matter-Energy: A Case of Misplaced Concreteness

(1985). The Circular Flow of Exchange Value and the Linear Throughput of Matter-Energy: A Case of Misplaced Concreteness. Review of Social Economy: Vol. 43, No. 3, pp. 279-297.
Magnetic γ-Fe2O3 nanoparticles coated with poly-l-cysteine for chelation of As(III), Cu(II), Cd(II), Ni(II), Pb(II) and Zn(II)

Abstract Poly- l -cysteine (PLCys n ) ( n = 20) was immobilized onto the surface of commercially available magnetic γ-Fe 2 O 3 nanoparticles, and its use as a selective heavy metal chelator was demonstrated. Magnetic nanoparticles are an ideal support because they have a large surface area and can easily be retrieved from an aqueous solution. PLCys n functionalization was confirmed using FTIR and the quantitative Ellman's test. Metal binding capacities for As(III), Cd(II), Cu(II), Ni(II), Pb(II) and Zn(II) were determined at pH 7.0 and compared to adsorption capacities for unfunctionalized γ-Fe 2 O 3 nanoparticles. The effect of pH on the PLCys n functionalized nanoparticles was also investigated. For all of the metals examined, binding capacities (μmol metal/g support) were more than an order of magnitude higher than those obtained for PLCys n on traditional supports. For As(III), Cu(II), Ni(II) and Zn(II), the binding capacities were also higher than the metal adsorption capacities of the unfunctionalized particles. Metal uptake was determined to be rapid ( 50% were obtained for all of the metals except As(III). PLCys n , which has a general metal selectivity towards soft metals acids, was chosen to demonstrate the proof of concept. Greater metal selectivity may be achievable through the use of combinatorial peptide library screening or by using peptide fragments based on known metal binding proteins.
The β-adrenergic agonist isoproterenol suppresses experimental allergic encephalomyelitis in Lewis rats

Treatment with the beta-adrenergic agonist isoproterenol suppresses clinical and histological experimental allergic encephalomyelitis in Lewis rats. The effect of isoproterenol treatment is greater when the drug is given from the time of immunization through the acute phase of the illness or from 8 to 14 days post-immunization than when given for the first 7 days after immunization.
Biomechanical regulation of type I collagen gene expression in ACLs in organ culture.

Abstract In this study, an ex vivo organ culture system that allows the application of controlled loads to the anterior cruciate ligament (ACL) was designed and used to characterize the influence of a step input in mechanical load on gene expression. A procedure for isolating bone–ACL–bone (B–ACL–B) complexes from rat knees was developed. After harvest and 24 hour culture, B–ACL–B complexes exhibited percentages of viability similar to that in intact ACLs (∼90%). Application of a physiologically relevant load of 5 N (superimposed on a 1 N tare load) resulted in changes in levels of mRNA encoding type I collagen. While levels of type I collagen mRNA significantly increased 32±13% ( mean ± standard errors of the mean ( SEM ) ) over controls within the first hour of loading, levels decreased significantly to 44±9% of control after 2 h. Displacements induced by the 5 N load were measured by video dimensional analysis. Calculated axial strains of 0.141±0.034 were achieved rapidly during the first hour and remained essentially unchanged thereafter. These results demonstrate the feasibility of maintaining ligaments in organ culture and illustrate the time course expression of type I collagen following the application of a mechanical load.
Surface reconstruction stability of Bi/GaSb surfaces

The phase diagram of the Bi/GaSb surface reconstructions has been established using density functional theory and cluster expansion computational methods. The predominant reconstructions in the alloy system are the same as those found for pure GaSb. That is, the (4 × 3) family of reconstructions dominate the phase diagram. However, at low Sb and Bi chemical potentials, the calculations predict a (2 × 1) structure for both GaSb and Bi/GaSb. It is found that Bi does not stabilize any additional structures, and Bi does not readily incorporate into the surface in the presence of Sb.
Paramagnetism in colour superconductivity and compact stars

It is quite plausible that colour superconductivity occurs in the inner regions of neutron stars. At the same time, it is known that strong magnetic fields exist in the interior of these compact objects. In this paper we discuss some important effects that can occur in the colour superconducting core of compact stars due to the presence of the stars' magnetic field. In particular, we consider the modification of the gluon dynamics for a colour superconductor with three massless quark flavours in the presence of an external magnetic field. We show that the long-range component of the external magnetic field that penetrates the colour-flavour locked phase produces an instability for field values larger than the charged gluons' Meissner mass. As a consequence, the ground state is restructured forming a vortex state characterized by the condensation of charged gluons and the creation of magnetic flux tubes. In the vortex state the magnetic field outside the flux tubes is equal to the applied one, while inside the tubes its strength increases by an amount that depends on the amplitude of the gluon condensate. This paramagnetic behaviour of the colour superconductor can be relevant for the physics of compact stars.
Acute Aluminum Toxicity and Alum Bladder Irrigation in Patients With Renal Failure

Intravesical alum instillation is an increasingly common treatment for hemorrhagic cystitis. It has been claimed that this therapy is safe in patients with renal failure. We report the case of a patient with renal failure following a bone marrow transplantation who developed an acute encephalopathy from apparent aluminum intoxication following intravesical alum. In a review of the literature, we have found two similar cases of acute aluminum intoxication from alum in patients with renal failure who have received multiagent chemotherapy. We suggest that alternate therapies be selected for hemorrhagic cystitis in such patients.
Sensor-actuator panels for underwater acoustic control

Local control of an acoustic projector or boundary can, in principal, be accomplished using large area locally-controlled actuators with an imbedded or intimately bonded sensor arrays. However in practice the marriage of an actuator and sensor array is not straightforward. In a basic research study, this paper considers the design and performance of a generic smart actuator for underwater acoustic applications. Both surface pressure and surface velocity sensing are included. Models are presented for understanding the importance of some of the mechanisms and construction issues involved, and for predicting the resulting system transfer functions. The predictions are compared with freefield experimental results.
Low-Loss Silicon Nitride AWG Demultiplexer Heterogeneously Integrated With Hybrid III–V/Silicon Photodetectors

A unique and novel platform that combines III-V and silicon photonic components with ultra-low loss silicon nitride waveguides for monolithic integration of novel photonic circuits is presented. Successful (proof-of-principle) integration of eight hybrid III-V/silicon photodetectors and an arrayed waveguide grating is shown. The InGaAs photodiodes in this platform had average fiber-coupled responsivity of 0.36 A/W at 1550 nm, 30 GHz electrical bandwidth, and operated up to 50 Gb/s. The AWG had an insertion loss of 0.85 dB and adjacent-channel cross-talk less than -38 dB.
Access to Universal Grammar: The real issues

Issues concerning UG access for L2 acquisition as formulated by Epstein et al. are misleading as well as poorly discussed. UG accessibility can only be fully evaluated with respect to the steady state gram mar reached by the learner. The steady state for LI learners is self evidently the adult grammar in the speech community. For L2 learners, however, the steady state is not obvious. Yet, without its clear characterization, debates concerning stages of L2 acquisition and direct and indirect UG accessibility cannot be resolved.
A NUMERICAL SCHEME FOR MODE III DYNAMIC FRACTURE PROBLEMS

SUMMARY This paper summarizes the formulation and numerical implementation of a spectral scheme specially designed for dynamic anti-plane shear (mode III) fracture problems. The scheme allows for a wide variety of simulations ranging from the dynamic loading of stationary cracks to the spontaneous propagation of faults. The method is based on a spectral form of the elastodynamic relation between the shearing tractions acting on the fracture surface and the resulting slip velocity response for a planar two-dimensional crack in an infinite linearly elastic medium. The formulation is expressed in the Fourier domain and involves a convolution over the past slip or slip rate history. Conversion between spectral and real domains is performed through the fast Fourier transform algorithm. The time-integration scheme is explicit and a variety of constitutive laws can be used to express the strength of the material on the fault plane. The stability and accuracy of the numerical scheme are discussed through comparison with existing analytical solutions involving non-propagating and propagating cracks. The extraction of the dynamic stress intensity factor from the computed slip history is described. ( 1997 by John Wiley & Sons, Ltd.
Patterns of protein synthesis in Escherichia coli infected by amber mutants in the first-step-transfer DNA of T5

The patterns of protein synthesis have been characterized in cells of Escherichia coli F infected by bacteriophage T5 with an amber codon in one or the other of two genes (I and II) within the 8% section of their DNA that is initially transferred to host cells (the first-step-transfer DNA). Infection by amber mutants of gene I permits the synthesis of some class 1 (pre-early) proteins, but no class 2 (early) or class 3 (late) proteins. One of the class 1 proteins (designated la), induced after infection by wild-type phage or by amber mutants of gene II, is not synthesized after infection by amber mutants of gene I. Further, in such infections, the shut-off of synthesis of both class 1 and host proteins (complete by 10 minutes after infection with wild-type phage or mutants of gene II) is defective. Infection by amber mutants of gene II also permits the synthesis of some class 1 proteins but again, no class 2 or 3 proteins. Protein 1a is synthesized and the synthesis of both class 1 and host proteins is shut off at the expected time of about ten minutes after infection. The absence of protein 1a after infection by amber mutants of gene I confirms that at least one protein of class 1 is coded by the first-step-transfer DNA portion of the phage genome. The results suggest that protein 1a is the product of gene I and that this protein is required for the degradation of host DNA, for the shut-off of synthesis of both host and class 1 proteins, and, together with the product of gene II, for phage DNA transfer.
The Prospects for the Disabled in Liberal Society

(2002). The Prospects for the Disabled in Liberal Society. Journal of Medicine and Philosophy: Vol. 27, No. 1, pp. 115-124.
Absorption and ionization spectra of model rubredoxins

We examine here spectroscopic properties of oxidized rubredoxin (Rdx) within the intermediate neglect of differential overlap method parameterized for spectroscopy. The Rdx structures are modeled using different length −SR residues bound to the Fe atom and the resulting effect on the absorption spectrum is examined. The corresponding ionization potentials are also calculated, and their dependence on the molecular charge is studied. This study suggests that models used to reproduce the redox properties of these important electron-transfer compounds must be carefully chosen. © 1995 John Wiley & Sons, Inc.
Long-term changes in plankton community structure and productivity in the North Pacific Subtropical Gyre: The domain shift hypothesis

Oceanic productivity, fishery yields and the net marine sequestration of atmospheric greenhouse gases are all controlled by the structure and function of planktonic communities. Detailed paleoceanographic studies have documented abrupt changes in these processes over timescales ranging from centuries to millennia. Most of these major shifts in oceanic productivity and biodiversity are attributable to changes in Earth's climate, manifested through large-scale ocean–atmosphere interactions. By comparison, contemporary biodiversity and plankton community dynamics are generally considered to be “static”, in part due to the lack of a suitable time frame of reference, and the absence of oceanic data to document ecosystem change over relatively short timescales (decades to centuries). Here we show that the average concentrations of chlorophyll a (chl a) and the estimated rates of primary production in the surface waters of the North Pacific Subtropical Gyre (NPSG) off Hawaii have more than doubled while the concentrations of dissolved silicate and phosphate have decreased during the past three decades. These changes are accompanied by an increase in the concentration of chl b, suggesting a shift in phytoplankton community structure. We hypothesize that these observed ecosystem trends and other related biogeochemical processes in the upper portion of the NPSG are manifestations of plankton community succession in response to climate variations. The hypothesized photosynthetic population “domain shift” toward an ecosystem dominated by prokaryotes has altered nutrient flux pathways and affected food web structure, new and export production processes, and fishery yields. Further stratification of the surface ocean resulting from global warming could lead to even more enhanced selection pressures and additional changes in biogeochemical dynamics.
The assessment of clinical distal symmetric polyneuropathy in type 1 diabetes: A comparison of methodologies from the Pittsburgh Epidemiology of Diabetes Complications Cohort

Distal symmetrical polyneuropathy (DSP) is the most common type of diabetic neuropathy, but often difficult to diagnose reliably. We evaluated the cross-sectional association between three point-of-care devices, Vibratron II, NC-stat(®), and Neurometer(®), and two clinical protocols, MNSI and monofilament, in identifying those with DSP, and/or amputation/ulcer/neuropathic pain (AUP), the two outcomes of major concern. This report presents data from 195 type 1 diabetic participants of the Epidemiology of Diabetes Complications (EDC) Study attending the 18-year examination (2004-2006). Participants with physician-diagnosed DSP, AUP or who were abnormal on the NC-stat, and the Vibratron II, MNSI, and monofilament were older (p 87%) and AUP (>80%), whereas the monofilament had the highest specificity (98% DSP, 94% AUP) and positive predictive value (89% DSP, 47% AUP), but lowest sensitivity (20% DSP, 30% AUP). The MNSI also had the highest negative predictive value (83%) and Youden's Index (37%) and currently presents the single best combination of sensitivity and specificity of DSP in type 1 diabetes.
Ultrasonic dynamic focusing using an analog FIFO and asynchronous sampling

A dynamic focusing method which employs an analog FIFO (AFIFO) for signal sampling and storage is proposed. The delay control on the ultrasound pulse echo at each array element for focusing delay compensation is achieved by the nonuniform sampling process, as suggested previously in a full digital beamforming system called Pipelined Sampled-Delay Focusing (PSDF). In the new focusing method, an analog sampling device, AFIFO, is used to sample and store values of the pulse echo as it arrives from each imaging point at each array element. Due to the first-in first-out operation of each AFIFO, all the samples for each imaging point along the axis of the beam are arranged at the same output position required on each channel and will be output simultaneously by a uniform output clock. Except for the nonuniform sampling control, all processing in the new dynamic beamforming method is carried out exactly the same as in conventional analog imaging systems. The advantages of the new system are that the sampling rate and hardware complexity for dynamic focusing can be greatly reduced by employing nonuniform sampling and analog signal processing. The performance and validity of the new method are verified experimentally. >
Mímesis del poder: cuerpo político, biopolítica y repetición

The association of mimesis with naive forms of representation is a legacy of Plato’s ontology that has not been exhausted in contemporary times. This article examines some of the conceptual assumptions underlying this association in order to support a richer conception of mimesis based on the notion of “non-sensuous similarities” and the will to power implicit in the mimetic act. More broadly, the article explores the underlying mimetic inscriptions both in modern theories of the body politic and the biopolitical mode of governability.