cssi/SciSciGPT-SciSciNet huggingface dataset:
Particle charging and charge screening in nonpolar dispersions with nonionic surfactants.

The electrostatic stabilization of colloidal dispersions is usually considered the domain of polar media only because of the high energetic cost associated with introducing electric charge in nonpolar environments. Nevertheless, some surfactants referred to as “charge control agents” are known to raise the conductivity of liquids with low electric permittivity and to mediate charge stabilization of nonpolar dispersions. Here we study an example of the particularly counterintuitive charging and electrostatic interaction of colloidal particles in a nonpolar solvent caused by nonionic surfactants. PMMA particles in hexane solutions of nonionic sorbitan oleate (Span) surfactants are found to exhibit a field-dependent electrophoretic mobility. Extrapolation to zero field strength yields evidence for large electrostatic surface potentials that decay with increasing surfactant concentration in a fashion reminiscent of electrostatic screening caused by salt in aqueous solutions. The amount of surface charge and s...
The Quantum Analysis of New Nitrogen Bands in the Ultra-Violet

IN a previous letter (NATURE, 114, 642, November 1, 1924), one of the writers predicted a new group of nitrogen bands with an origin at about 65,000v, having for its initial state the final state of the first positive group, and for its final state the stable condition of the neutral molecule. A group of strong bands in almost precisely the predicted position has now been measured and analysed, but, contrary to expectations, the progressions of this group are not related to those of any other analysed group of nitrogen, or of any other substance.
Dextrorphan relieves neuropathic heat-evoked hyperalgesia in the rat

Abstract Dextrorphan (DEX), a non-competitive NMDA receptor antagonist, was given intraperitoneally and intrathecally (i.t.) to rats with an experimental painful peripheral mononeuropathy. The neuropathy was created by placing loosely constrictive ligatures around the sciatic nerve, and the pain threshold was studied with the paw-flick method. The effects of DEX on the neuropathic heat-evoked hyperalgesia that follows this nerve injury were determined during the period of peak symptom severity. DEX given i.p. relieved heat-evoked hyperalgesia in a dose-dependent manner without producing motor impairment. The highest doses tested (12.5 and 25 mg/kg) produced a large but incomplete block (about 50%). DEX had no effect on the responsiveness of the paw on the control side. i.t. injection of 20 μg DEX completely blocked heat-hyperalgesia when tested 1 h later; again, the effect was achieved without motor impairment and without any change on the control side. These results suggest that DEX may be useful in the treatment of human neuropathic pain.
Ultrasound screening of the lambdoid suture in the child with posterior plagiocephaly.

The child with posterior plagiocephaly may have positional molding or unilateral lambdoid synostosis. Molding responds to conservative treatment, lambdoid synostosis requires surgical reconstruction. CT is diagnostic, but uses ionizing radiation, may need sedation, and the incidence of lambdoid fusion is only 2–3%. The purpose of this prospective study was to evaluate ultrasound as a screening test of lambdoid sutural patency using CT as the reference standard. In total, 41 children having head CT examinations were enrolled over 6 months. Of those, 29 were referred for abnormal head shape and suspected synostosis, of whom two had lambdoid fusion; 12 were referred for indications not related to head shape and found to have a normal study. Ultrasound scanning and interpretation of the lambdoid sutures was performed blinded to the CT reference standard. The lambdoid suture was read as patent or fused if a hypoechoic gap could or could not be seen between the hyperechoic calvarial bones, respectively. The mean sensitivity and specificity of ultrasound in distinguishing a patent from fused lambdoid suture by three blinded pediatric radiologists was 100% and 89%, respectively. Sonography of the lambdoid sutures shows excellent preliminary promise as a screening test of lambdoid sutural patency.
GONADOTROPIC ACTION OF PITUITARIES FROM PREGNANT COWS

EARLY STUDIES on the gonad′Stimulating ability of the hypophysis were made by various workers with implants of fresh pituitaries of cattle into immature test animals. Most of the more recent work has been done on pituitaries from other species. As studies of a quantitative nature involving injection of pituitary preparations were initiated, it has appeared that bovine pituitaries are not nearly as rich in gonadotropic hormone as are glands of sheep and horses. Evans et al. (i) stated that beef anterior pituitary is a poor source of gonad′Stimulating hormone when it is implanted intramuscularly or when it is injected in the form of an extract. Wallen′Lawrence and Van Dyke (2) estimated that cattle glands contain less than 1/10 the concentration of hebin to be obtained from sheep glands. Hill (3) rated the gonadotropic po′tency of cattle pituitaries as being 1/143 to 1/200 of that of the horse and 1/62 to i/iooth that of the sheep. Chance etal.
North-South trade and Southern industrialization

Abstract This paper presents a simple model of international trade and growth between a mature, industrial region (the North) and a semi-industrial, primary exporting region (the South). Under capital autarky, per capita Southern industrial output is minimized if the North is at the Golden Rule point. Regardless of whether capital is internationally mobile, Northern transfers to the South will not necessarily raise Southern industrial output unless they reach a critical level. Additional transfers may crowd Northern private investment in the South out if this critical level is not attained. The effects of changes in saving behavior and technical progress are also studied.
Unfolding of an α-helix in water

We describe a 1 ns molecular dynamics simulation of an 18-residue peptide (corresponding to a portion of the H helix of myoglobin) in water. The initial helical conformation progressively frays to a more disordered structure, with the loss of internal secondary structure generally proceeding from the C-terminus toward the N-terminus. Although a variety of mechanisms are involved in the breaking of helical hydrogen bonds, the formation of transient turn structures, with i----i + 3 hydrogen bonds, and bifurcated hydrogen-bond structures intermediate between alpha and turn or 3(10) structures is a common motif. In some cases a single water molecule is inserted into an internal hydrogen bond, but it is also common to have several water molecules involved in transient intermediates. Overall, the results provide new information about the detailed mechanisms by which helices are made and broken in aqueous solution.
Anesthetic considerations for patients undergoing double-lung transplantation.

During the 22 years since Barnard’s historic operation, numerous clinical studies and advancements in basic science research have allowed significant breakthroughs in cardiothoracic organ transplantation. As experience with heart transplantation grew, surgical options for patients with high pulmonary vascular resistance and right ventricular failure were being investigated. In 1981, the Stanford group successfully performed the first combined heart and lung transplantation.’ The patient with end-stage pulmonary disease and normal cardiac function presents thoracic surgeons with a different set of challenges. The first human lung transplant was performed by Hardy et al in 1963.2 During the following 20 years, approximately 50 lung transplant operations were performed, the longest patient survival being 8 months.3 Because of this poor long-term survival rate, lung transplantation was performed only rarely until the mid-1980s. With the
Protein-methotrexate-IgG complexes in the serum of patients receiving high-dose antifolate therapy.

Three patients who were treated with repetitive courses of high-dose methotrexate and leucovorin rescue experienced hypersensitivity symptoms during infusion of the drug. Serum from all three patients contained one complex of methotrexate bound to a protein similar in size to albumin and a second complex of the protein-bound methotrexate coupled to IgG. This immune complex was not found in 4 patients similarly treated who did not experience hypersensitivity symptoms. Cancer 46:471–474, 1980.
Fusion of inertial, optical flow, and airspeed measurements for UAV navigation in GPS-denied environments

This paper describes the data fusion approach that is developed for navigation of autonomous unmanned aerial vehicles (UAVs) for those applications where the Global Positioning System (GPS) signals are denied. Example scenarios include navigation under interference and jamming and urban navigation missions. The system architecture is biologically inspired and exploits measurements that are utilized by flying insects for self-localization purposes. The data fusion algorithm implements the Kalman filter mechanization that fuses INS data (position velocity and attitude), optical flow data from a monocular downward looking visual system (scaled body-frame vehicle velocity components), and compass measurements (azimuth angle). Kalman filter measurement observables are formulated in a complimentary form, i.e., as differences between optical flow/compass measurements and INS states that are projected into the measurement domain. The filter estimates inertial error states and error in the flight height. We present the navigation solution architecture and demonstrate its feasibility using simulations and actual data experiments. Also, we compare our results to a data fusion algorithm that fuses airspeed and optical flow measurements.
Analysis of Dynamic Behavior of Ultra-High Voltage Porcelain Arresters with New Type Lead Dampers

Dynamic behavior of the 1100kV porcelain arresters with and without the new type lead dampers and are investigated，based on theoretical analysis and finite element analysis. The results of theoretical analysis show that the dynamic response of 1100kv porcelain arrester can be decreased by damping measures, which can change the dynamic behavior of equipment. The results of finite element analysis show that the primary frequencies of these two structures are between 1Hz and 10Hz and the differences between them is not obvious, which indicated that the overall stiffness of the two structures is low and the frequency and vibration mode of these two structures have hardly been changed by the lead dampers. The level modes dominated the equipment, while vertical modes and torsional modes are not obvious. Owning to an effect of increment of damping device with the new type lead dampers, there is a reduction by 40% above in the maximum root stress of porcelain bushing. In the meantime, the new type lead dampers can also decrease the relative displacement at the top of equipment.
Hormonal modification of sexually dimorphic behavior

Abstract 1. Female animals exposed to stimulation by testosterone in utero or very soon after birth may exhibit changes in adult mating behavior which are indicative of two independent types of modification. One is defeminization, and another quite different one is masculinization. The behavioral modifications are believed to represent changes in separate neural mechanisms, either of which can be altered without changing the other. The implication is, of course, that the CNS is originally bisexual with respect to its behavioral potential. 2. Independent changes which can be produced in males by eliminating the effects of endogenous testosterone during early development are demasculinization and/or defeminization. Here again, separate neural mechanisms are postulated. 3. In rodents and carnivores there are at least two types of behavior which are normally dimorphic in adulthood and are subject to modification by manipulation of androgenic stimulation during very early development. One type, represented by mating behavior, depends heavily upon concurrent hormonal stimulation in adulthood during the time it is being manifested. The other, represented by urination behavior in female dogs, is hormonally modifiable in utero but independent of gonadal hormones in adulthood. Female dogs genitally masculinized by testosterone pre- and neonatally exhibit male mounting responses as adults but only if they are injected with testosterone propionate before and during the time of testing. The same females display the male urination pattern as adults, but this behavior occurs without any concurrent androgenic stimulation and is in fact unaffected by testosterone injections. It would appear that certain sex differences in behavior which normally appear at the time of puberty are dependent upon both prenatal and pubertal hormonal action, whereas other differences may depend only upon hormonal action during development and emerge at the normal age of puberty without any additional endocrine facilitation.
Existence and Uniqueness of Fast Decay Entire Solutions of Quasilinear Elliptic Equations

We prove the existence and uniqueness of fast decay solutions and clarify the structure of positive radial solutions of the quasilinear elliptic equation Δmu+f(u)=0 in Rn, where Δm denotes the m-Laplace operator, and f has a supercritical growth for small u>0 and a subcritical growth for large u. Our proofs use only elementary arguments based on several variational identities and a maximum principle of Peletier and Serrin.
486: Comparison of the QuantiFERON-TB Gold assay and tuberculin skin test in prenatal screening for tuberculosis in pregnant women, with prior BCG vaccination

CONCLUSION: 1. 84% of respondents are salaried employees and have their PLI paid for by an institution. 2. Significant percentages are unsure or have no knowledge of their type of PLI policy or policy limits. 3. Two thirds experienced at least one liability claim. 4. Two thirds of claims were dropped without payment, about /4 were settled with payment and < 10% went to trial with majority of Defense verdicts. 5. Experience with liability claims prompted significant changes in practice patterns and the practice of defensive medicine.
Explaining Citizen Evaluations of Urban Services A Comparison of Some Alternative Models

This study evaluates alternative models of citizen satisfaction with urban services. More specifically, it compares and assesses three models of satisfaction at two points in time. The availability...
The additivity of the η-invariant. The case of a singular tangential operator

We prove the decomposition formula for the η-invariant of the compatible Dirac operator on a closed manifoldM which is a sum of two submanifolds with common boundary.
Viking snaps over 50,000 Mars photos

More than 50,000 photographs of Mars, taken by the Viking spacecraft from 1976 through 1980, have been processed at the Jet Propulsion Laboratory in Pasadena, California. Viking 1, launched August 20, 1975, arrived at Mars on June 19, 1976. The Viking 1 lander separated from the orbiter and landed in the Chryse Planitia region on July 20, 1976. Viking 2 was launched September 9, 1975, and entered orbit around Mars on August 7, 1976. The Viking 2 lander touched down in the Utopia Planitia region of the planet on September 3, 1976.
Standardization vs. conventionalization

Reponse a l'article precedent intitule «Performative utterances: a reply to Bach and Harnish» ou M. Reimer critique la theorie indirecte et standardisee de l'enonciation performative developpee par l'A.. Rejetant les objections qui lui ont ete faites, l'A. montre que l'alternative proposee par Reimer repose sur des fondements errones
Kernel-based feature extraction and its application on HRR signatures

Kernel-based Feature Extraction (KFE) is an emerging nonlinear discriminant feature extraction technique. In many classification scenarios using KFE allows the dimensionality of raw data to be reduced while class separability is preserved or even improved. KFE offers better performance than alternative linear algorithms because it employs nonlinear discriminating information among the classes. In this paper, we explore the potential application of KFE to radar signatures, as might be used for Automatic Target Recognition (ATR). Radar signatures can be problematic for many traditional ATR algorithms because of their unique characteristics. For example, some unprocessed radar signatures are high dimensional, linearly inseparable, and extremely sensitive to aspect changes. Applying KFE on High Range Resolution (HRR) radar signatures, we observe that KFE is quite effective on HRR data in terms of preserving/improving separability and reducing the dimensionality of the original data. Furthermore, our experiments indicate the number of extracted features that are needed for HRR radar signatures.
A quantitative risk assessment for fumonisins B1 and B2 in US corn.

Quantitative risk analysis permits modifying risk estimates with changes in variables such as exposure. This analysis for exposure to the mycotoxin fumonisin describes the magnitude of adverse effects, variability in the population and uncertainty of models as a range of possible outcomes. The most sensitive adverse response in rats, nephrotoxic lesions, was used for the dose-response analysis. Dietary intake of corn products was estimated from a 3-day consumption survey. Levels of corn in each product were estimated by standard methods. Fumonisin levels in corn products were estimated from Food and Drug Administration (FDA) surveillance data and distributions of fumonisin consumption were modelled for each eater in the survey population. Uncertainty for predictions made from each model and uncertainty resulting from model selection were described. Results of the dose-response and exposure analyses were assimilated in a two-dimensional Monte-Carlo simulation. Distributions representing variability and unc...
Segregation of titanium powder with polydisperse size distribution: Spectral and correlation analyses

Abstract Additive manufacturing with powder metallurgy is becoming a popular and cost effective process due to improvements in powder availability and the ability to produce a part close to the desired net shape. Because the particles have a variety of shapes and sizes, the flow of titanium powder may be hindered if it is not uniformly mixed, resulting in poor quality end products. Understanding how titanium powder flows, and how the flow is affected by various flow parameters is essential for the proper utilization in additive manufacturing. By studying the segregation of the distribution of many sizes of particles in titanium powder, proper flow conditions could be established in order to produce the highest quality end products as possible. The results of several analysis techniques indicate that the greatest mixing of industrial titanium powder occurs nearest the center of a rotating tumbler with the smallest diameter. This indicates that short flow distances are best if titanium parts with maximum homogeneity are sought.
Thromboembolism in patients undergoing thoracotomy

To determine the incidence of thromboembolism in relation to thoracotomy, 77 patients undergoing pulmonary resection were prospectively studied up to 30 days postoperatively for deep venous thrombosis and pulmonary embolism. Overall, 20 of 77 patients (26%) had thromboembolic events during their hospitalization. Four deep venous thromboses and 1 pulmonary embolism were detected in 5 of 77 patients preoperatively for an incidence of 6%. Postoperative thromboembolism was detected in 15 of 77 (19%): deep venous thrombosis in 11 (14%) and pulmonary embolism in 4 (5%). No postoperative thromboembolisms occurred in the 17 patients receiving preoperative aspirin or ibuprofen, whereas they did occur in 25% of the remainder (15/60). Thromboembolism after pulmonary resection was more frequent with bronchogenic carcinoma than with metastatic cancer or benign disease (15/59 [25%] versus 0/18 [0%]; p 3 cm in diameter) compared with smaller lesions (9/19 [47%] versus 6/40 [15%]; p < 0.0001), stage II compared with stage I (7/14 [50%] versus 7/34 [21%]; p < 0.04), and pneumonectomy or lobectomy compared with segmentectomy and wedge resection (14/49 [29%] versus 1/28 [4%]; p < 0.005). Three of 4 patients with thromboembolism detected preoperatively had operation within the previous year. Postoperative pulmonary embolism was fatal in 1 of 4 (25%) and accounted for the one death. These results suggest patients undergoing thoracotomy for lung cancer, especially adenocarcinoma, should be considered for thromboembolic prophylaxis.
Effects of methadone on free feeding in satiated rats

A variety of opioids and opiates are known to increase short-term food intake. In the present study, we evaluated the effects of methadone on free feeding in satiated rats. We assessed the effect of methadone (0, 1.5, 3.0, 5.0, and 10.0 mg/kg) on food intake 1, 2, 4, and 6 h after injection for 3 consecutive days. Two hours after methadone administration, food intake was inversely related to dose, but after 6 h a direct relationship between dose and feeding was obtained. Food intake increased with repeated methadone administration. In Experiment 2, methadone (5.0 mg/kg) was injected and food was made available 0, 1, 2, or 3 h later. Maximal food intake occurred in the third and fourth hours following methadone administration. As in Experiment 1, food intake increased with repeated methadone administration. Increases in food intake following repeated methadone administration may have been due to the development of tolerance to effects of methadone that may interfere with feeding, such as sedation. In Experiment 3, methadone was administered daily or every fifth day, assuming that spacing injections would retard tolerance development. Repeated daily methadone administration was associated with increased food intake earlier in the session, whereas increases in food intake following spaced methadone administration occurred later in the session. These data indicate that methadone increases short-term feeding in satiated rats. This is in contrast to the reported decrease in food-reinforced behavior noted in operant studies. This contrast may be due to sedating or other disabling effects of methadone.
Prey selection by larval weakfish (Cynoscion regalis): the effects of prey size, speed, and abundance

We examined feeding by larval weakfish, Cynoscion regalis (Bloch and Schneider), in laboratory experiments conducted during the 1991 spawning season. under natural conditions weakfish larval development is ca. 3 wk, and we ran separate experiments with larvae of five different ages (5, 8, 11, 14, and 17 d post-hatching). We used two different size classes of rotifers (Brachionus plicatilis) and brine shrimp nauplii (Artemia sp.) as prey organisms. Contrary to results of previous research, weakfish larvae did not select prey based on size alone. When prey abundance was above 100 itemsl-1 weakfish, larvae always chose large rotifers (length = 216 μm) over small rotifers (length = 160 μm). At 11 d post-hatching, larvae switched their diet from large rotifers to small brine shrimp nauplii (length = 449 μm); however, when fed small rotifers and small brine shrimp nauplii the change in diet occurred at 14 d post-hatching. This pattern of selectivity was maintained in each larval age class. Early-stage larvae (5 and 8 d post-hatching) did not feed selectively when prey abundance was less than 100 itemsl-1. Late-stage larvae (17 d post-hatching) fed selectively at abundances ranging from 10 to 10000 items-1. Lwimming speeds of prey items, which ranged from 1 to 6 mms-1, had no consistent effect on prey selection. These results suggest that weakfish larvae are able to feed selectively, that selectivity changes as larvae age, and that selectivity is also influenced by prey abundance.
Visual capacity of marine teleostNemipterus japonicus (Bloch)

The differential distribution of cones in the various regions of the retina of the fishNemipterus japonicus (Bloch) was studied. In tangential section two types of cones are observed viz single and double cones, double cones being greater in number than single cones. Of the total cones, double cones constitute 86% while single cones constitute only 14%. In most of the retinal regions, cones are in the square mosaic pattern. The temporal region has greater number of cones than the other retinal regions which were studied. The correlation coefficients for the temporal region with all other regions are invariably positive. The test shows that there is no significance between the eyes whereas significance is observed among the various retinal regions. The pattern of cone arrangement agrees with the bottom dwelling habit of the fish. The shape of the eye is modified by being slightly ablong with comparatively longer anterio-posterior axis. The retinal cup is more hollow at the temporal region than at the nasal region.
Effect of Surface Modification on the Optical Properties of Nanocrystalline Zinc Oxide Materials

The wide band gap and unique photoluminescence (PL) spectrum of nanocrystalline zinc oxide (nano-ZnO) make it useful for a variety of photonics and sensor applications. Toward the goal of modifying the electronic structure and optical properties of nano-ZnO, nanorods were functionalized with electron withdrawing organosilanes, 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFDS) and pentafluorophenyltriethoxysilane (PFS), and a partially conjugated heterobifunctional molecule, p-maleimidophenyl isothiocyanate (PMPI). Fourier transform infrared (FTIR) spectroscopy and x-ray photoelectron spectroscopy (XPS) confirmed the presence of the modifiers on the nano-ZnO surface and verified covalent attachment. PL spectroscopy was performed to evaluate the influence of the modifiers on the nano-ZnO inherent optical behavior. An increase in the nano-ZnO near-band edge emission (UV) was evident for the organosilane modifiers, despite their differing electronic structures, while the defect emission (visible) remained unchanged. However, surface modification with the non-silane modifier PMPI resulted in unaltered UV and visible emission intensity. The varying influence of the modifiers may be due to the absence of a silane group in the PMPI, allowing for more efficient electron transport to the modifier. The influence of size/shape of the nanocrystalline ZnO was also examined by reacting spherical nanoparticles with PFDS. Preliminary results indicate that PFDS modification of the nanospheres resulted in similar PL behavior as the nanorods; although, the inherent PL of the spheres differs from the nanorods. These studies will elucidate the role of modifier structure on surface-modified nano-ZnO optical behavior, so that optical tailoring of the nano-ZnO inherent PL can be realized.
Development of 41Ca-Based Pharmacokinetic Model for the Study of Bone Remodelling in Humans

Background and Objective: Initial studies show that 41Ca may be employed as a useful diagnostic bioassay for monitoring metabolic bone disease and its treatment management. The 41Ca-based pharmacokinetic model is developed to assess its feasibility in monitoring bone disease and clinical responsiveness to therapeutic regimens. Methods: A four-compartment calcium kinetic model is developed to interpret the results of clinically measured 41Ca tracer kinetics for oral and intravenous dose. This model is extended to simulate changes in bone turnover due to osteoporosis by using Gompertzian function with and without cellular accommodation. The rate constants obtained by fitting to the experimental data on drug intervention are used to simulate the impact of strategic treatment intervention. Results: The present model fits well with the available experimental data on 41Ca tracer kinetics. In the simulated osteoporotic model, the negative bone balance (i.e. bone loss) reflected by 41Ca/Ca urine ratio is used to demonstrate slow/fast increase over time compared to the normal state. The cellular accommodation impact is reflected by a recovery from perturbed balance. The model’s predictive ability on the impact of therapeutic intervention is verified using published experimental data. The effect of bisphosphonate intervention results in positive bone balance (i.e. bone gain). Conclusion: The four-compartment 41Ca tracer kinetic model can be flexibly used in the interpretation of results obtained from ongoing clinical studies.
Devenir à long terme des filtres caves places chez les patients ayant un bypass intestinal

Rationnelle Il a ete bien etabli que la mise en place d’un filtre de veine cave inferieure (VCI) au moment de la chirurgie ouverte de bypass gastrique (BGO) chez les patients ayant un indice de masse corporelle superieur a 55 kg/m2 reduit le taux d’embolie pulmonaire et la mortalite perioperatoire. Cependant, peu de choses sont connues au sujet des effets a long terme des filtres gastrique dans ce groupe particulier de patients. Methodes Sur une periode de huit ans, un total de 571 patients obeses morbides ont subi des procedures de BGO, et 58 (10%) d’entre eux ont necessite la mise en place d’un filtre VCI en preoperatoire. Chaque filtre VCI etait place par voie percutanee par une approche de veine femorale en utilisant un arceau mobile OEC. Les types de filtres VCI utilises dans notre etude etaient TrapEase (n = 35), Simon-Nitinol (n = 9), Greenfield (n = 2), et Bard Recovery (n = 12). Resultats Des 58 patients qui ont eu besoin d’un filtre VCI, 56 sont restes exempts de tout phenomene thromboembolique au cours de la periode de huit ans (extremes, 1-8 ans). Les deux autres patients ont developpe une thrombose veineuse profonde. Une patiente a ete traitee avec succes avec de l’heparine intraveineuse et six mois de Coumadine. Elle a eu la resolution complete de sa thrombose veineuse profonde et il a ete fortuitement trouve une mutation genique de la prothrombine 20210. L’autre patiente, qui a eu des complications multiples de la deviation gastrique, ne pouvait pas etre traitee efficacement avec de l’heparine intraveineuse et progressa jusqu’a la thrombose de la VCI. Elle a developpe une phlegmasia cerulea dolens et fut amputee des deux cotes au-dessus du genou. Elle est morte 3 mois apres ses procedures. Conclusion Il s’avere que la mise en place d’un filtre VCI lors d’un BGO est une intervention relativement benigne avec un avantage maximal. Il faudrait porter attention aux patients obeses qui ont une hypercoagulabilite et a ceux qui ont des complications liees a la deviation gastrique. Une attitude agressive, qui peut se composer d’une anticoagulation immediate apres les procedures (seulement si elle est consideree sure), devrait etre preconisee dans ce petit sous-groupe de patients obeses morbides.
A numerical model for predicting the fire resistance of reinforced concrete beams

A numerical model, in the form of a computer program, for tracing the behavior of reinforced concrete (RC) beams exposed to fire is presented. The three stages associated with the numerical procedure for evaluating fire resistance of RC beams; namely, fire temperature calculation, thermal analysis and strength analysis, are explained. A simplified approach to account for spalling under fire conditions is incorporated into the model. The use of the computer program for tracing the response of RC beams from the initial pre-loading stage to collapse stage, due to the combined effect of fire and loading, is demonstrated. The validity of the numerical model is established by comparing the predictions from the computer program with results from full-scale fire resistance tests. Through the results of numerical study, it is shown that the type of failure criterion has significant influence on predicting the fire resistance of RC beams.
Assessment of Hurricane Ivan impact on chlorophyll-a in Pensacola Bay by MODIS 250 m remote sensing.

The impact of Hurricane Ivan on water quality in Pensacola Bay was investigated by MODIS 250 m remote sensing of chlorophyll-a concentrations at different time slots before and after the hurricane event. Before the hurricane, the mean chlorophyll-a in the Bay was 5.3 μg/L. Heavy rainfall occurred during the hurricane landfall. The 48 h rainfall reached 40 cm and the peak storm surge reached 3 m on 9/16. After the rainstorm and during the storm surge on 9/17/2004, the mean chlorophyll-a concentration substantially increased to 14.7 μg/L. 26.3% water area was in the poor-water-quality condition (chl-a > 20 μg/L). This indicates that heavy nutrient loads from urban stormwater runoff and storm-surge inundation simulated chlorophyll bloom. After the end of the storm surge on 9/18/2004, the mean chlorophyll dropped to 2.0 μg/L, suggesting the effective flushing of polluted water from the bay to the Gulf of Mexico by the storm-surge. The good water quality condition lasted for almost several weeks after the storm surge. The peak river flow, arriving on the 4th day after the peak storm surge, did not alter the good water quality situation in the bay. This indicates that urban stormwater runoff rather than the river inflow is the major pollutant source for water quality in Pensacola Bay during the hurricane.
Factors affecting the rate of disappearance of amphetamine in rats

Abstract The rate of disappearance of amphetamine is faster in male adult Sprague-Dawley rats than in adult females. Estradiol (0·8 mg/kg s.c. for 16 days) slow down the rate ofd-amphetamine disappearance in adult male rats. The half-life (T12) ofd-amphetamine in young male rats is greater than in adult male or female rats. Pretreatment of rats with either phenobarbital or 3-methylcholanthrene in doses sufficient to decrease theT 12 of hexobarbital and zoxazolamine does not change the tissue levels ofd-amphetamine. Diphenylhydantoin, another inducer of liver microsomal aromatic hydroxylase, does not increase and actually decreases the rate ofd-amphetamine disappearance.
The relation between the ethics of personal conscience-social responsibility and principled moral reasoning.

Three samples of college students were tested on Hogan's Survey of Ethical Attitudes (SEA) and Rest's Defining Issues Test (DIT), a test of moral reasoning ability in the Kohlbergian tradition. In addition, one of the samples took Collins's revision of Rotter's Internal-External Scale (I-E) while another sample took Snyder's Self-Monitoring Scale. There was a small but reliable tendency for subjects who endorsed the “ethics of personal conscience,” as measured by the SEA, to show greater maturity in moral reasoning, as assessed by the DIT. This result was seen as raising some interesting questions about the relation between liberalism-conservatism and moral maturity. The subjects who advocated the ethics of social responsibility tended to show more internal locus of control as measured by the I-E scale. There also was a tendency for subjects who preferred the morality of conventional role-conformity, as measured by the DIT, to have high scores on the Self-Monitoring Scale. The correlations between personal conscience and mature moral reasoning, while significant, were small enough to make it seem that people of various social and political attitudes are likely to achieve maturity in moral reasoning.
Mechanisms for hole doping in thallium cuprate superconductors having single copper-oxygen sheets

Abstract This article describes some recent studies on the effect of chemical substitution on the superconducting properties of thallium cuprates containing single Cu-O sheets interleaved with single and double Tl-O layers. These studies strongly suggest that, for Tl2Ba2CuO6, Tl 6s-block bands lie below the Fermi level, so that they remove electrons from the Cu 3d x2−y2 bands, i.e., the Tl-O layer creates holes in the CuO2 layers. This is in contrast to TlBa2CuO5-type phases, where the metal chemistry forces the oxidation of CuO2 layers. However, studies on TlSr2−xLaxCuO5 and TlBa1−xSrxLaCuO5 systems indicate that for Tl-O single rock-salt layer phases with a short in-plane Cu-O distance, such as TlSrLaCuO5, the CuO2 layer x2−y2 band is raised high enough in energy for the Tl-O layer to create holes in the CuO2 layer
Do Acidic Residues in the Tri-Asp Motif of the CNGA3 S2 Domain Form Required Pairings with Positive Residues of the S1-S4 Bundle? Evidence from Day-Blind Dogs and Insights from a Molecular Model of CNGA3 S1-S6 with Md Simulations

Cone CNGA3 homo-tetramers were expressed in tSA201 cells. Missense mutations were generated in a highly conserved region of S2 containing three Asp residues denoted as the Tri-Asp motif. This motif is conserved in all CNG channel subunits. We substituted Asp 231 with Asn which resulted in complete loss of channel function. This conserved missense mutation is similar to Asp267Asn in canine CNGB3 which is associated with the loss of cone function resulting in day-blindness in the dogs. Further substitutions of all acidic residues in the Tri-Asp motif were generated with Ile, Asn, Cys, or Glu. Cyclic GMP-activated current data from excised patches of cells expressing CNGA3 channels showed that any substitution of an Asp residue resulted in the loss of channel function. Further, Asp substitutions resulted in mislocalization of a fluorescent tagged subunit suggestive of improper folding and ER retention. Our results highlight a crucial role for the Tri-Asp motif in channel biogenesis as well as function. A homology model of the S1-S6 domains of the cCNGA3 channel was created, using Kv1.2/2.1 as a template, and relaxed in a membrane with molecular dynamics simulations. The model shows that the Tri-Asp residues are involved in salt bridge pairings with positive residues of S2-S4. We hypothesize that the canine Asp/Asn mutation alters the electrostatic equilibrium in the S1-S4 bundle. In previous Shaker channel studies, conserved acidic residues in the Tri-Asp motif have been implicated in monomer folding. We, therefore, suggest that loss of the side chain cross bridges in the missense dog mutation destabilizes electrostatic interactions impairing the monomer folding state during biogenesis.
A linear solver for sparse banded matrices

Abstract A linear solver for sparse banded matrices is proposed applicable to problems represented by rectangular grid structure in computational space. The new method offers a large saving in multiply-add count as well as a data flow organization compatible with contemporary architecture of array processors. The algorithm is most effective for large three-dimensional grids.
A simple method for detecting valve stiction in oscillating control loops

Abstract This paper presents a simple and new method for detecting valve stiction in an oscillating control loop. The method is based on the calculation of areas before and after the peak of an oscillating signal. The proposed method is intuitive, requires very little computational effort, and is easy to implement online. Analytical results are derived to show the theoretical basis of the new method and field results are presented to show its effectiveness on real world control loops.
A Consequence of No Short Scale for Ordinal Graphs with No Infinite Paths

On etablit une consequence de l'inexistence d'une courte echelle pour les graphes ordinaux sans chemins infinis en relation avec le resultat de Erdos-Hajnal-Milner
Queuing networks with population size constraints

The class of queuing networks with multiple routing subchains is extended to include mechanisms of state-dependent lost arrivals and triggered arrivals. A sufficient condition is found, involving the loss and trigger functions, for the equilibrium network state probability distribution to have the product form; the known class of queuing networks with a product form solution is thus enlarged. Such queuing networks are useful models for systems with various population size constraints. Potential applications to modeling computer communication systems with storage and flow control constraints are indicated.
THE DERIVATION OF CLAUSAL GERUNDS

Abstract. This paper investigates the syntax of clausal gerunds—a class of gerunds that can have either a null subject or an overt DP Case-marked with accusative or nominative. First, it addresses the difficulty of accounting for gerunds that allow both null and overt subjects in principles and parameters/minimalist approaches to Case and control. Second, the paper explores the existence of a common structure for the two clausal gerunds, supported by the absence of empirical distinctions in their feature specification, especially regarding tense. Third, the paper introduces new observations about the distribution of clausal gerunds and argues that the complex alternations and restrictions on their distribution results from the interaction between Case and Agreement valuation, the limited possibility of A-movement out of a clausal gerund, and convergence considerations resulting from the existence of distinct numerations.
Computer Networking for Scientists

Scientific research has always relied on communication for gathering and providing access to data; for exchanging information; for holding discussions, meetings, and seminars; for collaborating with widely dispersed researchers; and for disseminating results. The pace and complexity of modern research, especially collaborations of researchers in different institutions, has dramatically increased scientists' communications needs. Scientists now need immediate access to data and information, to colleagues and collaborators, and to advanced computing and information services. Furthermore, to be really useful, communication facilities must be integrated with the scientist's normal day-to-day working environment. Scientists depend on computing and communications tools and are handicapped without them.
Hospitality Leadership Implications: Multigenerational Perceptions of Dissatisfaction and Intent to Leave

Through this study the author examines generational similarities and differences hospitality employees have of dissatisfaction and intent to leave their organization. Leaders in the hospitality industry recognize that the ability to source and retain employees long-term is fundamental to improving customer services and achieving expected financial returns. In this study the author investigated, through survey instrumentation, the workplace perspectives of 885 hospitality industry employees pertaining to multigenerational groupings. The information from this study helps guide hospitality industry leaders and human resource professionals in developing policies, processes, and practices that create a productive work environment and employees integrated across multigenerational groupings.
The Fear Questionnaire: a validity study.

Abstract In a rigorously selected sample of 48 agoraphobic patients, the Agoraphobia scale was more sensitive and it alone discriminated between the rates of improvement in two independently identified subgroups of outcome than the Social Phobia or the Blood-Injury Phobia scales of the Fear Questionnaire (Marks and Matthews, 1979). The results also suggested that cutoff scores of 30 on the questionnaire may prove potentially useful as a diagnostic aid of adequate sensitivity and specificity.
A general constitutive relation for linear elastic foams

A three-dimensional linear elastic constitutive relation is formulated based on a representative unit cell of foam using elasticity theory and micromechanics homogenization scheme. The displacement and strain fields of the unit cell are obtained from elasticity theory and used to derive the macroscopic strain field defined on the outer surface of unit cell through homogenization scheme. By assuming a uniform macroscopic stress on the unit cell surface and the existence of strain energy potential, the constitutive relation of linear elastic foams is obtained. The newly derived constitutive relation is a function of mechanical property of solid constituent, the geometry of cell struts, and the porosity of foams and is able to characterize the anisotropic behavior of foams due to non-uniform strut geometry. The linear elastic response of open-celled foams with both low- and medium-relative densities can be studied using the derived constitutive relation. The effective elastic modulus for uniform strut geometry is reduced from the constitutive relation and agrees well with Gibson and Ashby's semi-empirical equation, Warren and Kraynik's, and Zhu's analytical models within relative density ranging from 0 to 0.35. For non-uniform strut geometry, the calculated effective elastic moduli in three axial directions are different and the material displays anisotropic behavior. The bulk modulus shows less dependence on the variation of the strut geometry. Poisson's ratios are also reduced from the compliance matrix.
Bilinear and 2-power input-output maps: Finite dimensional realizations and the role of functional series

The paper considers finite-dimensional dynamical systems which have bilinear i-o maps. Using functional series expansions, it is shown that the i-o maps have state representations of special structure. These representations specialize to ones which have been obtained previously by Arbib [2] for the discrete-time case and Marchesini and Picci [11] for the continuous-time case. In addition, they lead very simply to a variety of necessary and sufficient conditions for the finite dimensional realization of bilinear i-o maps. These conditions go well beyond similar conditions which have been discussed in the recent literature. They also apply to single-input, single-output i-o maps which are 2-powers. The techniques which are used are quite general and extend to k -linear and k -power i-o maps.
Conformations of cyclic peptides. V. A proton magnetic resonance study of evolidine, cyclo-ser-phe-leu-pro-val-asn-leu.

The 220 MHz proton magnetic resonance spectrum of the cyclic heptapeptide evoli-dine, cyclo-Ser-Phe-Leu-Pro-Val-Asn-Leu, has been analyzed. From the temperature dependence of chemical shift of the peptide protons in dimethyl sulfoxide, it is concluded that the peptide protons of the Asn and Phe residues are shielded from the solvent. This observation and H-Cα-N-H dihedral angles, estimated from the corresponding coupling constants, are combined in a proposed conformation of the peptide backbone. The consistency of this conformation with other proton magnetic resonance observations is discussed.
Indirect allorecognition of MHC class II peptides accellerates cardiac allograft rejection in miniature swine

suppression without rejection episodes. All control animals (n 6), irrespective if they were treated with FK or CsA, rejected within 60 days after immunosuppression withdrawal. In the MphTX group, animals rejected on POD 84, 99 and 131 (FK immunosuppression) and on POD 79 (CsA). One animal is currently alive on POD 180 (FK). Donor cell chimerism peaked early after transplantation and decreased steadily thereafter in all animals. One animal that received a modified protocol with CsA and MphTX on POD 0 and 7 developed donor-specific tolerance in the MLR and is currently alive at POD 306. Conclusion: Tolerance induction is possible in this model of macrophage cotransplantation, but is not as efficient as pretransplant recipient whole body and thymus irradiation. Therefore, further refinement of the protocol is required to improve graft acceptance.
Accuracy of Person Perception A Component Analysis According to Cronbach

Androgynous, sex-typed, and undifferentiated subjects predicted the responses of androgynous, sex-typed, and undifferentiated others to masculine, feminine, and neutral situations. The self-report criterion data replicated the findings of Helmreich, Spence, & Holahan (1979). In accordance with Cronbach's (1955) suggestion, separate correlational measures of person accuracy, situation accuracy, and person-by-situation accuracy were computed. Subjects were more accurate at predicting person effects and situation effects than person-by-situation interactions. Females-particularly feminine-typed females-were best at making person predictions, while males-particularly masculine-typed and androgynous males were best at making situation predictions.