cssi/SciSciGPT-SciSciNet huggingface dataset:
Micro-spectrochemical analysis of document paper and gel inks by laser ablation inductively coupled plasma mass spectrometry and laser induced breakdown spectroscopy

Abstract Current methods used in document examinations are not suitable to associate or discriminate between sources of paper and gel inks with a high degree of certainty. Nearly non-destructive, laser-based methods using laser induced breakdown spectroscopy (LIBS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) were used to improve the forensic comparisons of gel inks, ballpoint inks and document papers based on similarities in elemental composition. Some of the advantages of these laser-based methods include minimum sample consumption/destruction, high sensitivity, high selectivity and excellent discrimination between samples from different origins. Figures of merit are reported including limits of detection, precision, homogeneity at a micro-scale and linear dynamic range. The variation of the elemental composition in paper was studied within a single sheet, between pages from the same ream, between papers produced by the same plant at different time intervals and between seventeen paper sources produced by ten different plants. The results show that elemental analysis of paper by LIBS and LA-ICP-MS provides excellent discrimination (> 98%) between different sources. Batches manufactured at weekly and monthly intervals in the same mill were also differentiated. The ink of more than 200 black pens was analyzed to determine the variation of the chemical composition of the ink within a single pen, between pens from the same package and between brands of gel inks and ballpoint inks. Homogeneity studies show smaller variation of elemental compositions within a single source than between different sources (i.e. brands and types). It was possible to discriminate between pen markings from different brands and between pen markings from the same brand but different model. Discrimination of ~ 96–99% was achieved for sets that otherwise would remain inseparable by conventional methods. The results show that elemental analysis, using either LA-ICP-MS or LIBS, provides an effective, practical and robust technique for the discrimination of document paper and gel inks with minimum mass removal (9–15 μg) and minimum damage to the document's substrate.
The Intellectual Context of Rerum Novarum

The subject of this article is the intellectual isolation of Roman Catholic — specifically papal — social doctrine, an isolation not only symbolized, but in some ways ratified and made permanent, by Rerum Novarum. I shall deal with it by posing and attempting to answer three related questions. Why did the Roman Church wait until 1891 before uttering any official teaching about the industrial economy? Why, when it did, was it so hostile to a market order? Why, in view of its lack of confidence in the market, was it so opposed to socialism? The short answer to all three questions is “The French Revolution.”
Spatial and long-term temporal variation of meiobenthic-hyperbenthic copepods in Lake Pontchartrain, Louisiana

Abstract The distribution and abundance of the meiobenthic-hyperbenthic copepods of Lake Pontchartrain (a large, 1630 km 2 , shallow, mean depth of 3·7m, brackish, 0·3–5‰, lake in Southeastern Louisiana) were characterized monthly from August 1978 to August 1979. Ten stations, all with water depth > 2m, were established and sampled quantitatively by removing four benthic subsamples (containing as much as 25 cm overlying water) from replicated box cores. Averaged across stations over time, total copepod densities ranged from 31–89 × 10 cm −2 . A total of only 15 copepod species were identified from benthic samples; 8 harpacticoids, 4 cyclopoids and 3 calanoids. The copepod assemblage in Pontchartrain differs from all other known benthic assemblages in that the species composition is dominated by species which are often associated with the water column; true infaunal species are rare or found in reduced abundance. Four species comprised 90% of all individuals collected. All four are epibenthic or commonly collected as zooplankton and include Scottolana canadensis which comprised 47% of all individuals collected, Halicyclops fosteri which dominated fall collections, Acartia tonsa and Pseudobradya sp. Burrowing species were largely restricted to the more saline eastern stations. The rarity of burrowing species might be related to low salinity, however the highly unstable bottom in Pontchartrain with silty-clayey sediments commonly resuspended into the water column, may also influence burrowers. Cluster analysis reveals diffuse seasonal grouping of stations for all seasons except fall, with spatial groupings from the central and western sides. Physical processes appear to dictate the community structure of benthic-hyperbenthic copepods in Lake Pontchartrain.
Viscosity of 25% solutions of cellulose acetate versus intrinsic viscosity distribution

The 25% w/w solutions of blends of cellulose acetate fractions have higher viscosities than solutions of single fractions of the same average intrinsic viscosity. It was found that the viscosity of a blend can be related to its composition by the relationship: where is the apparent intrinsic viscosity of the cellulose acetate blend in solution at 25% concentration, and [η]i are the intrinsic viscosities of the components. By application of this equation it was determined that only a portion of the high anomalous viscosity of solutions of cellulose acetate prepared from viscose grade wood pulp could be attributed to intrinsic viscosity distribution.
1274 OUTCOME OF VERY LOW BIRTH WEIGHT (VLBW) INFANTS

From 1961-76, 229 VLBW infants (750-1000 gm) were admitted to the Stanford Intensive Care Nursery . Of these, 144 (63%) died at 2-fold that from 1961-76; this fact was associated with a 76% (75/99) overall survival which was > that, 32% (74/229), prior to 1977 (p < .001). Our improved survival rate for more infants yearly and our low incidence of severe late morbidity (12%) are encouraging results of intensive care for VLBW infants.
An Object-Oriented Framework for Multidisciplinary, Multi-Physics, Computational Mechanics

This paper presents the design and development of an object-oriented framework for computational mechanics. The framework has been designed to address some of the major deficiencies in existing computational mechanics software packages. The framework addresses the deficiencies of existing computational mechanics software packages by (a) having a sound design using the state of the art in software engineering, and (b) providing model manipulation features that are common to a large set of computational mechanics problems.
Leukocytes of Humans Exposed to Lysergic Acid Diethylamide: Lack of Chromosomal Damage

Leukocyte cultures from eight human subjects who had had recent exposure to large doses of lysergic acid diethylamide were examined for chromosome abnormalities. The number of abnormalities was not significantly greater than that in control cultures.
The potency of the first two cleavage cells in echinoderm development: the experiments of Driesch revisited

A hundred years have passed since Driesch performed the classical experiment of separating sea urchin blastomeres from a two-cell-stage embryo, finding that each developed into a complete though smaller larva. The earlier studies of Roux using frogs showed that inactivating one of the two blastomeres by a heated needle resulted, during the early stages of development, in the formation of a half embryo. In this type of experiment, in which the two blastomeres are not separated, the live blastomere continues its development while it is still attached to an inactivated neighbour. In the work reported here, Roux's experimental design was used on two-cell-stage embryos of sea urchins. In contrast to the findings of Roux using amphibians, it was found (as claimed by Driesch) that the living blastomere developed as in the case of separated blastomeres.
Workload prediction and dynamic voltage scaling for MPEG decoding

In this paper we present three efficient DVS techniques for an MPEG decoder. Their energy reduction is comparable to that of the optimal solution. A workload prediction model is also developed based on the block level statistics of each MPEG frame. Compared with previous works, the new model exhibits a remarkable improvement in accuracy of the prediction. The experimental results show that, with the new prediction model, the presented DVS techniques achieve more energy reduction than previous works while delivering the same Quality of Service (QoS).
Coordination and timing of spine and hip joints during full body reaching tasks.

Abstract Coupling of spine and hip joints during full body reaching tasks was investigated in 16 participants (8 male and 8 female) who performed reaching tasks at comfortable and fast-paced movement speeds to three targets located in a para-sagittal plane. The participants paused at target contact for 500 ms and then returned to an upright posture. Three-dimensional joint motions of the spine and hip were recorded using an electromagnetic tracking device. We found an effect of movement phase (i.e., reach and return) on the onset timing of the spine and hip joints. For most target locations and movement speeds, spine motion onset preceded hip motion onset during the reaching phase of the movement task. In the reach phase, when averaged across all movement conditions, spine joint motion preceded hip joint motion by an average of 48.9 ms. In contrast, in the return phase, hip joint motion preceded spine joint motion by an average of 63.0 ms. Additionally, when participants were instructed to use either a knee flexion or knee extension strategy to perform the reaching tasks there was no effect of movement strategy on timing of the spine and hip. There was also no effect of target height on the spine–hip ratio, but as movement speed increased, the spine/hip ratio decreased for all target locations due primarily to an increase in hip joint excursion. The findings indicate clear differences in onset timing of the spine and hip joints during reaching tasks that necessitate some forward bending of the trunk and that onset timing is reversed for the return to an upright posture.
Transformation of 1,1-dichloro-2,2-(4-chlorophenyl)ethane (DDD) by Ralstonia eutropha strain A5

Evidence is presented demonstrating the ability of Ralstonia eutropha A5 to degrade 1,1-dichloro-2,2-bis(4-chlorophenyl)ethane (DDD) aerobically. Strain A5 was able to effect significant transformation of [14C]DDD: the hexane extractable radioactivity decreased to approximately 50% of the controls while more than 25% of the total radioactivity became associated with the acidified culture supernatant. There was also an increase in the amount of radioactivity associated with the cell pellet when compared to the biotic control. A meta-fission pathway for the degradation of DDD is proposed based on the recovery of seven chlorinated metabolites identified by gas chromatography-mass spectrometry analysis.
The angular dependence of diffuse LEED intensities and its structural information content

Abstract The structural determination of disordered adsorbates from diffuse LEED intensities has so far relied on measured angle-dependent intensity maps taken at fixed energies. It is therefore important to understand the structural information content of such intensity maps. We have examined the degree of angular dependence of the diffuse intensities, since this is the foremost factor affecting the density of information content. To that end, we have measured and calculated energy-dependent diffuse I - V curves at nearby exit angles: diffuse I - V curves are very promising alternatives to the fixed-energy diffuse LEED maps. In particular, we address the issue of how densely diffuse LEED maps and diffuse I - V curves should optimally be sampled.
Physicians’ perceived usefulness of and satisfaction with test reports for cystic fibrosis (ΔF508) and factor V Leiden

Purpose: We sought to determine whether variation in test-report content for cystic fibrosis (CF ΔF508) and factor V Leiden (fVL) would impact physician-perceived usefulness of and satisfaction with test reports. Methods: A cross-sectional survey of US physicians from specialties likely to order the tests was performed. Physicians received an introductory letter with a clinical scenario, one randomly assigned mock report, and a one-page survey. The analyses evaluated usefulness of and satisfaction with report elements. Results: For CF and fVL, there were significant differences by mock-report version for most of the survey report items (P 0.70) with satisfaction were (1) clinical decision-making information, (2) genetic counseling information, and (3) implications for family members. Conclusion: Opportunities exist to improve the usefulness of genetic test reports in clinical practice.
Method of determining tip structure in atomic force microscopy.

The stability of single atomic tip is tested using molecular-dynamics simulation. Many metallic single-atomic tips are unstable during the scan at a tip load well below typical experimental values. For the bcc W(111) tip, second-layer-tip-atomic contributions are comparable to the first-layer contribution. These results suggest that experimentally multiple-atom tips are involved in the scanning process. We propose a method to identify tip size and structure during the scanning process. The resultant images for a number of commonly used tip materials are interpreted and compared to experiments.
Effects of Chronic Exposure to an Anabolic Androgenic Steroid Cocktail on α5-Receptor Mediated GABAergic Transmission and Neural Signaling in the Forebrain of Female Mice

Anabolic androgenic steroids (AAS) are synthetic derivatives of testosterone that are illicitly self-administered for enhancement of performance and body image, but which also have significant effects on the brain and on behavior. While the stereotypical AAS user is an adult male, AAS abuse in women is rapidly increasing, yet few studies have examined AAS effects in female subjects. We have assessed the effects in female mice of a combination of commonly abused AAS on neuronal activity and neurotransmission mediated by GABA type A (GABA(A)) receptors in the medial preoptic nucleus (MPN); a nexus in the circuits of the hypothalamus and forebrain that are critical for the expression of social behaviors known to be altered in AAS abuse. Our data indicate that chronic exposure to AAS resulted in androgen receptor (AR)-dependent upregulation of alpha(5), beta(3) and delta subunit mRNAs. Acute application of the alpha(5) subunit-selective inverse agonist, L-655,708 (L6), indicated that a significant fraction of the synaptic current is carried by alpha(5)-containing receptors and that AAS treatment may enhance expression of alpha(5)-containing receptors contributing to synaptic, but not tonic, currents in the MPN. AAS treatment also resulted in a significant decrease in action potential frequency in MPN neurons that was also correlated with an increased sensitivity to L-655,708. Our data demonstrate that chronic exposure to multiple AAS elicits significant changes in GABAergic transmission and neuronal activity that are likely to reflect changes in the expression of alpha(5)-containing synaptic receptors within the MPN.
A Sequence of Unimodal Polynomials

The purpose of this paper is to establish the unimodality and to determine the mode of a class of Jacobi polynomials which arises in the exact integration of certain rational functions as well as in the Taylor expansion of the double square root.
Measuring the Advising Alliance for Female Graduate Students in Science and Engineering An Emerging Structure

Faculty advisors play an important role in the development of graduate students. One group for which the advising relationship has been shown to be especially crucial is women in science, technology, engineering, and mathematics (STEM). We designed two studies to assess the advising alliance for women in STEM graduate programs using the student version of the Advisor Working Alliance Inventory (AWAI) along with additional content developed by our team. Study 1 (N = 76) was developed to assess item performance and the initial structure with a pilot sample of undergraduate and graduate students in science and engineering. Study 2 (N = 293) was designed to assess the advising alliance exclusively for women in STEM graduate programs. Our results indicated that an alternative alliance structure may exist for women in STEM and in Study 2 two factors emerged, which indicated that instrumental support and psychosocial support are two salient factors for women in STEM.
Circular permutation of a WW domain: Folding still occurs after excising the turn of the folding-nucleating hairpin

A hyperstable Pin1 WW domain has been circularly permuted via excision of the fold-nucleating turn; it still folds to form the native three-strand sheet and hydrophobic core features. Multiprobe folding dynamics studies of the normal and circularly permuted sequences, as well as their constituent hairpin fragments and comparable-length β-strand-loop-β-strand models, indicate 2-state folding for all topologies. N-terminal hairpin formation is the fold nucleating event for the wild-type sequence; the slower folding circular permutant has a more distributed folding transition state.
The utility of lymph node mapping sonogram and thyroglobulin surveillance in post thyroidectomy papillary thyroid cancer patients

Background The American Thyroid Association recommends lymph node mapping (LNM) ultrasonography 6–12 months after thyroidectomy for patients with papillary thyroid cancer (PTC). The yield of LNM over thyroglobulin (TG) screening is not well defined. We sought to investigate this relationship. Methods Post thyroidectomy LNM was performed on 163 patients with PTC. LNM was considered positive based on these criteria: Loss of fatty hilum (LOFH), microcalcifications, hypervascularity, architectural distortion, or short axis (>8 mm). Serum TG levels were compared to LNM and fine needle aspiration (FNA). Results Sixty-nine patients had suspicious LNM (42%) and 17 had PTC on FNA (25%). There were 135 suspicious lymph nodes described with malignant nodes found in 6 of 65 patients (9%) with LOFH, 13 of 18 patients (76%) with microcalcifications, 11 of 12 patients (92%) with hypervascularity, 16 of 28 patients (52%) with architectural distortion, and 4 of 7 patients (52%) with enlarged size on FNA. The positive predictive value of LNM was 0.34, increasing to 0.66 when LOFH was excluded. Among 152 patients with documented TG data, LNM identified cervical nodal metastasis in 4 patients with TG Conclusion LNM can detect recurrent PTC when TG level is undetectable, and LOFH is a low-yield sonographic characteristic.
Phase matching in second-harmonic generation using artificial periodic structures

The use of artificial periodic structures, consisting of spatial modulations of the linear and nonlinear susceptibilities of a nonlinear optical medium, to achieve phase matching in second-harmonic generation is analyzed. Dispersion relations and approximate formulas for the second-harmonic fields generated under various conditions are obtained and used to evaluate the experimental situation.
Insurance status and quality of outpatient care for uncomplicated acute rhinosinusitis.

Importance Previous work suggests an association between insurance status and location of presentation (emergency department vs outpatient clinic) for evaluation of uncomplicated acute rhinosinusitis (ARS). Objective To investigate whether the quality of outpatient care for ARS likewise differs based on insurance status. Design, Setting, and Participants Cross-sectional study of 13 680 145 pediatric and adult patients from the 2009 and 2010 National Ambulatory Medical Care Survey diagnosed with uncomplicated ARS at an outpatient care facility. Exposures Health insurance status. Main Outcomes and Measures The primary outcome measures were continuity of care with the patients’ primary care physician (PCP) and time spent with a physician, which were chosen as proxies for quality of care. We evaluated associations between insurance status and these quality measures while controlling for clinical, demographic and socioeconomic patient characteristics, and outpatient practice setting. Results Most patients (76.4%) had private insurance vs Medicare (12.3%), Medicaid (8.6%), or self-pay (2.8%). There was no association between insurance status and presentation of patients to their PCP. Physicians spent more time with Medicaid patients compared with patients with private insurance (β = 4.59; P = .01), independent of other factors. Provision of health education (β = 4.42; P P = .002), and increasing patient age (β = 0.07; P = .01) were associated with longer visits. In multivariate analysis, living in a medium or small metropolitan area was associated with higher likelihood of being seen by one’s own PCP than living in a large metropolitan area (odds ratio, 6.37; 95% CI, 2.13-19.05; P = .001). Conclusions and Relevance This study did not identify any quality of care issues with respect to insurance coverage and primary care encounters for patients with ARS. In contrast to expectations, patients with Medicaid had longer outpatient physician visits and were equally likely to see their own PCP compared with patients with private insurance or Medicare.
A filtration model for the flow of dilute, stable emulsions in porous media. II: Parameter evaluation and estimation

Part I of this work outlined a new theory, based on deep-bed filtration concepts, to describe the flow of dilute, stable emulsions in underground porous media. Here, in Part II, we quantitatively test the proposed theory against experimental data and we indicate how the filtration model parameters can be estimated from first principles. Comparison is made between the theory and data on transient permeability and effluent concentration for dilute, oil-in-water emulsions of mean drop-size diameters ranging from 1 to 10 μm and volume concentrations of 0.5–2.5% flowing in quartz sandpacks of 0.57–2.0 μm2 permeability. The pH of the continuous aqueous phase is kept constant at 10. Filtration theory successfully represents the data, permitting unambiguous evaluation of the theoretical parameters. Procedures are described for a priori calculation of the filtration parameters from knowledge of the drop size and the pore-size and grain-size distributions of the porous medium. Good agreement is achieved between the experimentally determined parameters and their estimated values. Thus, the proposed filtration model provides a reliable tool for predicting emulsion flow behaviour in porous media.
Conjectures and questions from Gerald Sacks's Degrees of Unsolvability

We describe the important role that the conjectures and questions posed at the end of the two editions of Gerald Sacks's Degrees of Unsolvability have had in the development of recursion theory over the past thirty years.
Use of a peer model in language training in an echolalic child

Abstract A 10-yr-old girl, carrying the diagnostic label of childhood autism, was trained to speak at a normal voice volume and acquired a labeling vocabulary, via an imitation learning paradigm which utilized a peer model. Results indicate that the modeling paradigm facilitated both volume training and label acquisition.
Massive edema of the ovary: High resolution MR findings using a phased-array pelvic coil

We report a rare premenarchal case of massive ovarian edema in which high resolution MRI findings more accurately reflected characteristic pathologic changes of this condition compared with CT and ultrasound. A potential role of MR in preoperative diagnosis of massive ovarian edema is suggested.
Diffusion of Ion Implanted Mg and Be in GaAs

Annealed Mg implants into GaAs show three diffusion regions: 1) rapid uphill diffusion in the peak of the implant; 2) rapid concentration-independent diffusion in the tail; and 3) slow concentration-dependent diffusion in between. Implanted Be, in contrast, exhibits only concentration-dependent diffusion. Constant Fermi level experiments show that this diffusion is actually hole-dependent. Uphill diffusion can be induced in Be implants by co-implanting with a heavier element such as Ar. Paradoxically, this retards the concentration-dependent diffusion. This behavior can be explained with the Substitutional-Interstitial-Diffusion (SID) mechanism and an understanding of the defect chemistry after implantation. In the region of uphill diffusion, the dopants are seen to getter from areas of excess Ga interstitials toward areas of excess Ga vacancies. The magnitude of the Ga interstitial gradient with respect to the dopant concentration is shown to be critical for the uphill diffusion. The reduction in concentration-dependent diffusion with co-implants is thought to be caused by implant damage allowing dopant atoms to shift from interstitial to substitutional sites.
MODEL-BASED WEIGHTING AND COMPARISONS

In survey research, sometimes the formation of groupings, or aggregations of cases on which to make an inference, are of importance. Of particular interest are the situations where the cases aggregated carry useful information that has been transferred from a sample employed in a previous study. For example, a school to be included in the sample of the High School Effectiveness (HSES) study must contain one or more cases transferred from the National Educational Longitudinal Study of 1988 (NELS:88). To calculate the aggregation inclusion probabilities, this study investigated three statistical models and, based on these models, derived the school weights for the HSES study. This study also assessed the effects of weighting by comparing the statistics yielded from different sets of weights: (a) those from an empirical population database and (b) those from data generated from simulation based on the principles of a superpopulation. Both categorical data and continuous variables were analyzed in the comparison.
Neurological prognosis correlated with variations over time in the number of subependymal nodules in tuberous sclerosis.

In tuberous sclerosis (TS), brain CT reveals subependymal nodules, cortical tubers and white matter lesions. This study is a retrospective analysis of the relationship between the variations over time in the number of subependymal nodules and the clinical course in cases of tuberous sclerosis. Twenty-four children with tuberous sclerosis, who attended the National Children's Hospital as outpatients, were followed by means of brain CT examinations for 7 years and 1 month on average. Cranial MRI was also performed in 22 cases. Brain CT disclosed subependymal nodules already in early infancy. In almost all cases, the number of subependymal nodules gradually increased with age, especially around the frontal horn of the lateral ventricle. The increase stopped at around age 10. The cases with five or more subependymal nodules at the initial or subsequent CT examination (17 patients; Group A) exhibited a significantly greater number of cortical tubers than those with less than five (five patients; Group B) and had white matter lesions unlike Group B. In addition, the number of cases with either infantile spasms or mental retardation was significantly higher in Group A than Group B (P<0.005). In conclusion, the number of ventricular subependymal nodules may allow prediction of the severity of the cerebral dysfunction in TS. Our results suggest that its variation may reflect the degree of the embryologic disorder when neuronal cells grow in the early gestational period.
Framing Effects on Public Opinion During Prewar and Major Combat Phases of the U.S. Wars with Iraq

Objectives. Our purpose was to develop and test several hypotheses concerning the impact of poll-question wording on aggregate public support for war. We drew on general insights from framing theory and specific insights from various theories of public support for war. Methods. Our database consisted of two collections of aggregate poll results drawn from the prewar and major combat phases of the Gulf War (1990–1991) and the Second War with Iraq (2002–2003). For each data set, we used multivariate OLS regression to gauge the impact of specific question-wording variations on the percentage of respondents expressing support for war, controlling for systematic time and pollster effects. Results. Most of the hypothesized wording effects were significant in the expected direction. Mentioning WMDs, terrorism, Saddam, hostages, and international support for war boosted aggregate war support in one or both wars; mentioning the president, oil or gasoline, international opposition to war, and U.S. or Iraqi casualties depressed support. Conclusions. Various theories emphasizing different “rational” aspects of public attitudes toward war are supported. However, the significance of mentioning Saddam by name in the Second War with Iraq, and mentioning the president in both wars, would seem to imply framing effects based more on emotion and/or symbolism.
An examination of the advantages of C3-C4 intermediate photosynthesis in warm environments

Abstract. The photosynthetic responses to temperature in C3, C3-C4 intermediate, and C4 species in the genus Flaveria were examined in an effort to identify whether the reduced photorespiration rates characteristic of C3-C4 intermediate photosynthesis result in adaptive advantages at warm leaf temperatures. Reduced photorespiration rates were reflected in lower CO2 compensation points at all temperatures examined in the C3-C4 intermediate, Flaveria floridana, compared to the C3 species, F. cronquistii. The C3-C4 intermediate, F. floridana, exhibited a C3-like photosynthetic temperature dependence, except for relatively higher photosynthesis rates at warm leaf temperatures compared to the C3 species, F. cronquistii. Using models of C3 and C3-C4 intermediate photosynthesis, it was predicted that by recycling photorespired CO2 in bundle-sheath cells, as occurs in many C3-C4 intermediates, photosynthesis rates at 35°C could be increased by 28%, compared to a C3 plant. Without recycling photorespired CO2, it was calculated that in order to improve photosynthesis rates at 35°C by this amount in C3 plants, (1) intercellular CO2 partial pressures would have to be increased from 25 to 31 Pa, resulting in a 57% decrease in water-use efficiency, or (2) the activity of RuBP carboxylase would have to be increased by 32%, resulting in a 22% decrease in nitrogen-use efficiency. In addition to the recycling of photorespired CO2, leaves of F. floridana appear to effectively concentrate CO2 at the active site of RuBP carboxylase, increasing the apparent carboxylation efficiency per unit of in vitro RuBP carboxylase activity. The CO2-concentrating activity also appears to reduce the temperature sensitivity of the carboxylation efficiency in F. floridana compared to F. cronquistii. The carboxylation efficiency per unit of RuBP carboxylase activity decreased by only 38% in F. floridana, compared to 50% in F. cronquistii, as leaf temperature was raised from 25 to 35°C. The C3-C4 intermediate, F. ramosissima, exhibited a photosynthetic temperature temperature response curve that was more similar to the C4 species, F. trinervia, than the C3 species, F. cronquistii. The C4-like pattern is probably related to the advanced nature of C4-like biochemical traits in F. ramosissima The results demonstrate that reductions in photorespiration rates in C3-C4 intermediate plants create photosynthetic advantages at warm leaf temperatures that in C3 plants could only be achieved through substantial costs to water-use efficiency and/or nitrogen-use efficiency.
Biased finger trees and three-dimensional layers of maxima: (preliminary version)

We present a method for maintaining biased search trees so as to support fast finger updates (i.e., updates in which one is given a pointer to the part of the tree being changed). We illustrate the power of such biased finger trees by showing how they can be used to derive an optimal O(nlogn) algorithm for the 3-dimensional layers-of-maxima problem and also obtain an improved method for dynamic point location.
Truth and Justice: Transience and Doubt in Chilean Documentary

Silvio Caiozzi's 1998 short documentary Fernando Is Back [Fernando ha vuelto] is notable for the explicitness with which it addresses Chile's recent history of violent state repression during the Pinochet regime (1973–1990). Although the film experienced a series of censorship attempts after its release, most viewers who have seen and commented on the film have emphasized its importance as a historical document that bears witness to the torture, murder, and disappearance of detainees apprehended during the dictatorship. (The film introduces us to the family of disappeared Fernando Olivares Mori, who is shown evidence on the skeleton of the person scientists believed to be Olivares of torture and execution.) Now, in light of new revelations in Chile regarding mistakes that may have been made by Chile's forensic institute, Servicio Medico Legal, the film can be viewed as an illustration of the ongoing trauma experienced by families of the disappeared—in this case, those families who had thought that they ha...
Lubricants in compressed tablet manufacture.

A theoretical discussion of the possible causes for sticking and binding during compression of granulations is presented together with fundamental research on the mode of action of a lubricant. One hundred seventy-one water-soluble compounds were studied for lubricating properties. Two per cent of a compound lubricant composed of equal parts of Dreft, sodium oleate, and Maprofix gave satisfactory lubrication to 72% of the tested granulations.
Multidimensional weighted Opial inequalities

In this article we produce Opial-type weighted multidimensional inequalities over balls and arbitrary smooth bounded domains. The inequalities are sharp. The functions under consideration vanish on the boundary.
Pulmonary function testing: Custom programs for manual equipment

Pulmonary Function Laboratories with manual equipment can expedite calculations and make them more accurate by using a programmable calculator that will compute functions and predictive equations. However, a custom-made set of programs is better than calculator libraries available from the manufacturer. With custom-made programs, calculations remain as the staff is used to receiving them, programs can be stored in the memory and called independently and only those tests used routinely need to be available.
Mechanistic Physiology and Institutional Economics: Jacques Loeb and Thorstein Veblen

Discusses the correspondence and use of each other′s ideas of Loeb and Veblen which are seen to be significant both in understanding the evolution of their own thought and as commentary on the times.
Homologies between signal transducing G proteins and ras gene products

The guanosine triphosphate-binding proteins (G proteins) found in a variety of tissues transduce signals generated by ligand binding to cell surface receptors into changes in intracellular metabolism. Amino acid sequences of peptides prepared by partial proteolysis of the alpha subunit of a bovine brain G protein and the alpha subunit of rod outer-segment transducin were determined. The two proteins show regions of sequence identity as well as regions of diversity. A portion of the amino-terminal peptide sequence of each protein is highly homologous with the corresponding region in the ras protein (a protooncogene product). These similarities suggest that G proteins and ras proteins may have analogous functions.
Experimental investigation of initial and subsequent yield surfaces for laminated metal matrix composites

Abstract The aim of this work is to construct yield surfaces to describe initial yielding and characterize hardening behavior of a highly anisotropic material. A methodology for constructing yield surfaces for isotropic materials using axial–torsion loading is extended to highly anisotropic materials. The technique uses a sensitive definition of yielding based on permanent strain rather than offset strain, and enables multiple yield points and multiple yield surfaces to be conducted on a single specimen. A target value of 20 × 10−6 is used for Al2O3 fiber reinforced aluminum laminates having a fiber volume fraction of 0.55. Sixteen radial probes are used to define the yield locus in the axial–shear stress plane. Initial yield surfaces for [04], [904], and [0/90]2 fibrous aluminum laminates are well described by ellipses in the axial–shear stress plane having aspect ratios of 10, 2.5, and 3.3, respectively. For reference, the aspect ratio of the Mises ellipse for an isotropic material is 1.73. Initial yield surfaces do not have a tension–compression asymmetry. Four overload profiles (plus, ex, hourglass, and zee) are applied to characterize hardening of a [0/90]2 laminate by constructing 30 subsequent yield surfaces. Parameters to describe the center and axes of an ellipse are regressed to the yield points. The results clearly indicate that kinematic hardening dominates so that material state evolution can be described by tracking the center of the yield locus. For a nonproportional overload of (σ, τ) = (500, 70) MPa, the center of the yield locus translated to (σ, τ) = (430, 37) MPa and the ellipse major axis was only 110 MPa.
Brutality of assault in political cartoons affecting humor appreciation

Political cartoons depicting a presidential candidate undergoing an aggressive assault were manipulated to assess the effect on humor appreciation of variations in the degree of brutality of the aggressive tactics (minimal, intermediate, extreme). The identity of the depicted candidate (Richard Nixon vs George McGovern) was also manipulated. Humor-appreciation ratings were given to these cartoons by student subjects during the week preceding the 1972 presidential elections. Attitudes toward the depicted candidates were assessed in a postexperimental questionnaire. Neither degree of brutality nor affect toward the victim exerted a significant main effect, but a significant transverse interaction between the two variables was observed. When the assault involved minimal levels of brutality, the victimization of a rejected candidate was appreciated significantly more than that of a favored one; when intermediate levels of brutality were depicted, assaults against rejected candidates did not differ appreciably from attacks upon favored candidates in the level of mirth they elicited; when the brutality was extreme, aggression against rejected candidates was appreciated less than assaults against favored candidates, although nonsignificantly so. Of the various theoretical notions which were advanced to predict the results, a rationale involving the decoder's motivation to favor or object to the manner in which the aggressive agent is characterized as well as his motivation to enjoy or dislike the communication's projected outcome was considered to account best for the findings.
Constitutional Limitations on Reëligibility of National and State Chief Executives.

On March 1, 1951, the Administrator of General Services certified that the proposed presidential tenure amendment submitted to the states by Congress in 1947 had been ratified by thirty-six states, thus making it a part of the United States Constitution.' Adoption of this proposal, which becomes the Twenty-second Amendment to the United States Constitution, disposes of an issue that has agitated American politics periodically since the establishment of the Presidency. Hereafter no person will be eligible for a third term as President if he has served two full elective terms or one full elective term plus more than one-half of another term through succession to the office. President Truman, who would otherwise be rendered ineligible for reelection following completion of his current term, is exempted from the ban by a qualifying clause which excludes from coverage "any person holding the office of President when this Article was proposed by the Congress."X2 Hostility to long continuance in office, particularly for executive officers, has been a prominent feature of American political thinking since Revolutionary times. Seven of the original state constitutions, all of which were formulated prior to adoption of the federal Constitution, carried clauses limiting reeligibility of the state chief executive. These provisions reflected a widely-held belief that a rotation in executive office was essential to the preservation of liberty.3 A sectional preference for the principle of limitation was noticeable;
Aqueous vanadium ion dynamics relevant to bioinorganic chemistry: A review.

Abstract Aqueous solutions of the four highest vanadium oxidation states exhibit four diverse colors, which only hint at the diverse reactions that these ions can undergo. Cationic vanadium ions form complexes with ligands; anionic vanadium ions form complexes with ligands and self-react to form isopolyanions. All vanadium species undergo oxidation –reduction reactions. With a few exceptions, elucidation of the dynamics of these reactions awaited the development of fast reaction techniques before the kinetics of elementary ligation, condensation, reduction, and oxidation of the aqueous vanadium ions could be investigated. As the biological roles played by endogenous and therapeutic vanadium expand, it is appropriate to bring the results of the diverse kinetics studies under one umbrella. To achieve this goal this review presents a systematic examination of elementary aqueous vanadium ion dynamics.
Beyond Belief: ideas and symbolic technologies in the study of international relations

As presently constituted, the analysis of `ideas' is deficient in two key respects. First, despite presenting itself as an alternative to the dominant rationalist perspective on international relations and foreign policy, the turn to `ideas' represents only a minor modification of that tradition, rather than a serious challenge to it. Second, the retention of the rationalist framework has had problematical implications for how `ideas' are conceptualized. Although explicitly defined as shared beliefs, we argue that the metaphors structuring rationalist analyses lead them to conceptualize `ideas' as objects. As an alternative, we offer a constructivist account of ideas as `symbolic technologies' that enable the production of representations. This different metaphor enables us to address directly the difficulties for analysis stemming from a conception of ideas as objects. It also opens up for examination a range of empirical phenomena overlooked by rationalist analysts.
Racial Discrimination and Physical Activity Among Low Income–Housing Residents

Background Although discrimination has been identified as a potential determinant of existing racial/ethnic health disparities, no studies have investigated whether racial discrimination contributes to disparities in physical activity. Purpose The primary aim of the current study was to examine the association between interpersonal racial discrimination and physical activity. Methods Baseline data were collected during 2004–2005 among a predominately black and Hispanic sample of adult residents living in 12 low-income–housing sites in Boston MA ( n =1055). Residents reported experiences of lifetime racial discrimination during interviewer-administered surveys and wore a pedometer for 5 days to measure physical activity. For analyses, performed in 2009, linear regression models with a cluster design were conducted to predict physical activity, measured as steps per day. Results Nearly 48% of participants reported ever experiencing racial discrimination, and discrimination was most commonly experienced on the street or in a public setting. No association was found between discrimination and physical activity, when examined in bivariate, multivariable, or race-stratified models. Conclusions The current results indicate that self-reported racial discrimination is not a key determinant of physical activity among residents living in low-income housing. However, additional research is warranted to address current limitations of this study.
Experimental Performance Characterization of Line-Focus Collectors

To be able to predict accurately the performance of a specific solar collector in a given environment, its performance must first be characterized over the range of conditions under which the collector is expected to operate. In the present paper, collector performance models are developed for parabolic trough and compound-parabolic type concentrating collectors. Experimental collector performance data from Sandia National Laboratories, Albuquerque, New Mexico and Wyle Laboratories, Huntsville, Alabama are used in a multiple linear regression analysis to identify significant independent variables and refine the collector performance models. The refined collector performance models are used to characterize performance of three different parabolic trough collectors and two different compound-parabolic collectors, with good correlations between modeled and experimental performance.
An empirical analysis of DeLone and McLean's e-commerce model in the student loan industry

Companies are integrating the flow of information and decision processes across the supply chain to provide better customer service and to improve business performance. Advancements in information and communication technologies have led to the implementation of web-enabled Business-to-Business (B2B) e-commerce systems to facilitate interorganisational coordination and decision making. Such systems are expensive to implement and yet may fail to achieve business objectives. Therefore, evaluation of how well such systems help organisations achieve goals is a necessity. Based on the theoretical model of DeLone and McLean (2004), this paper empirically investigates the success of e-commerce systems in the student loan industry.
Emotional and physiological desensitization to real-life and movie violence

Youth are exposed to large amounts of violence in real life and media, which may lead to desensitization. Given evidence of curvilinear associations between exposure to violence and emotional distress, we examined linear and curvilinear associations of exposure to real-life and movie violence with PTSD symptoms, empathy, and physiological arousal, as well emotional and physiological reactivity to movie violence. College students (N = 209; mean age = 18.74) reported on their exposure to real-life and televised violence, PTSD symptoms, and empathy. Then, students were randomly assigned to view a series of violent or nonviolent high-action movie scenes, providing ratings of emotional distress after each clip. Blood pressure was measured at rest and during video viewing. Results showed that with increasing exposure to real-life violence, youth reported more PTSD symptoms and greater identification with fictional characters. Cognitive and emotional empathy increased from low to medium levels of exposure to violence, but declined at higher levels. For males, exposure to higher levels of real-life violence was associated with diminishing (vs. increasing) emotional distress when viewing violent videos. Exposure to televised violence was generally unrelated to emotional functioning. However, those with medium levels of exposure to TV/movie violence experienced lower elevations of blood pressure when viewing violent videos compared to those with low exposure, and those with higher levels of exposure evidenced rapid increase in blood pressure that quickly declined over time. The results point to diminished empathy and reduced emotional reactivity to violence as key aspects of desensitization to real-life violence, and more limited evidence of physiological desensitization to movie violence among those exposed to high levels of televised violence.