1,313 research outputs found
sj-pdf-1-epb-10.1177_23998083211040519 - Supplemental material for A framework for delineating the scale, extent and characteristics of American retail centre agglomerations
No full textSupplemental material, sj-pdf-1-epb-10.1177_23998083211040519 for A framework for delineating the scale, extent and characteristics of American retail centre agglomerations by Patrick Ballantyne, Alex Singleton, Les Dolega and Kevin Credit in EPB: Urban Analytics and City Science</p
Investigation of a pressure rise in a shear stress gauge
No full textThesis (B.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1995.Includes bibliographical references (leaf 54).by Herbert L. Singleton, Jr.B.S
Singleton Consistencies
No full textWe perform a comprehensive theoretical and empirical study of the benefits of singleton consi0R1 ci0R ur theoretiBO results help place si ngleton consi stenci es wi thi n thehi erarchy of local consi stenci es. To determ i e the practi cal value of these theoret iet results, we measured the cost-effectiveness of pre-processi gwi hsi gleton consi2 ency algori thms. ur experi ments use both random and structured problems. Whi9A pre-processi gwi hsi gleton consi1 enci1 i noti n general benefici al for random problems,i t starts to pay o# when randomness and structure are combi01R and i i very worthwhi2 wi th structured problems li ke Golomb rulers. n such problems, pre-processing with consistency techni ques as strong as singleton generalized arc-consistency (the sinngleton extensi on of generalized arc-consistency) can reduce runti mes. We also show thatli01 i g algorithms that enforcesi gleton consi2 enciM to a single pass often gi es a small reducti on i the amount of pruni g andi9 roves th cost-effectiveness. These experimental results also demonstrate that conclusions from studies on random problems should be treated with caution
Harry H. Singleton.II, a warrior as activist: racism in Horry county, South Carolina , 1965-2005, 2009
No full textThis historical narrative examined the impact of institutional and individual racism during the Post Civil Rights Era by analyzing the life and work of minister, businessman, and educator, Reverend Harry H. Singleton, II of Horry County. South Carolina. Special attention was given to Singletons role in the integration of Horry County Public Schools. the Conway High School football boycott, and his work as a civil rights leader with the National Association for the Advancement of Colored People (NAACP). Further, incidents in Singletons life and career as a civil rights activist reflect the legal support of district courts in South Carolina. particularly in the case of Harry H. Singleton v. Horry County Board of Education. Based on the research, Singletons life is reflective of an African-American leader whose contributions to race relations on the grassroots level was indicative of his life experiences growing up in Edgefield. South Carolina and his commitment to correcting racism in Horry County, South Carolina from 1965 to 2005
Difference in the D-dimer rise between women with singleton and multifetal pregnancies
No full textIntroduction: The differences in the D-dimer rise between women with singleton and multifetal pregnancies have not been studied extensively. Materials and Methods: D-Dimer levels were determined in 1089 blood specimens from 1089 women in various stages of pregnancy, including 977 and 112 women with singleton and multifetal pregnancies, respectively. None of the 1089 women developed hypertension or clinical venous thromboembolism during pregnancy or in the postpartum period. Results: The D-dimer levels were significantly and positively correlated with gestational week at examination in women with singleton or multifetal pregnancies. The D-dimer levels (mu g/ml, mean +/- SD [number of specimens]) determined at the 1st trimester did not differ significantly (0.81 +/- 0.82 [102] for singleton vs. 1.20 +/- 0.77 [7] for multifetal), but those at the 2nd (1.61 +/- 1.45 [216] vs. 2.62 +/- 2.26 [59]) and 3rd (2.37 +/- 2.22 [659] vs. 4.02 +/- 2.14 [46]) trimesters were significantly higher in women with multifetal than singleton pregnancies. The 90th percentile value was 4.31 mu g/ml for 1089 specimens. A significantly greater number of women exceeded 4.31 mu g/ml during the 2nd (16.9% vs. 5.6%, P = 0.0043) and 3rd (34.8% vs. 10.6%, P < 0.0001) trimesters among those with multifetal than with singleton pregnancies. Conclusions: The degree of D-dimer rise in pregnancy was greater in women with multifetal than with singleton pregnancies. (C) 2013 Elsevier Ltd. All rights reserved
Body mass index on outcomes of nulliparous singleton pregnancies in Brunei Darussalam
No full textIntroduction: Studies have shown that both overweight and underweight women are more likely to have adverse pregnancy outcomes compared to those with normal body weight. This study assessed the impact of body mass index (BMI) on pregnancy outcomes among primigravid women who delivered at a tertiary hospital.
Materials and Methods: All nulliparous women delivering singleton babies at RIPAS Hospital (1st October 2009 to 30th September 2010, N=1,290) were included. BMI was classified based on the World Health Organisation classification. For analyses, the BMI groups were categorised into three groups; Low (25.0). The relative risk (RR) for Gestational Hypertension (GHT), Gestational Diabetes Mellitus (GDM), assisted delivery and induction of labour (IOL) were calculated for the different BMI groups. Results: Overall, 40.4%, 19.8% and 39.8% were categorised as Normal, Low and High BMI respectively. Hypertension (5.8%) and diabetes mellitus (2%) were more common in the High BMI group, while anaemia was common in the Low (34%) and Normal groups (23.8%). The High group were more likely to have GHT and GDM, IOL and likely to need assisted delivery (all p<0.001). Low BMI group had a lower prevalence of GHT and GDM, higher preterm labour, small for gestational age (SGA) babies, and more normal vaginal delivery (all p<0.05). There were no significant differences in admission to special care baby unit and rates of stillbirth or early neonatal death between the different groups. Multivariate analyses (controlled for maternal age and smoking) showed higher risk for GHT (RR=2.6, 95% CI=1.2-5.4) in the Normal and High BMI groups (RR=3.7, 95% CI=1.8-7.5), and GDM among the high BMI group (RR=2.6, 95% CI=1.1-6.1). The risk for assisted delivery was also higher (RR 2.0, 95% CI=1.4-2.9) compared to the Normal and High BMI group (RR 1.3, 95% CI=0.9-1.6) and IOL was higher among normal BMI (RR 1.5, 95% CI=1.0-2.2) and High BMI (2.7, 95% CI = 1.9-4.0) groups.
Conclusions: Maternal BMI was strongly associated with pregnancy complications and outcomes. There is a need for an effective programme to increase awareness of the importance of achieving normal BMI for a healthy pregnancy
Reply to "Comment on 'Inflation with a graceful exit and entrance driven by Hawking radiation' "
No full textThe Comment [J. T. Firouzjaee, preceding Comment, Phys. Rev. D 89, 068301 (2014)] raises two points in regard to our paper [S. K. Modak and D. Singleton, Phys. Rev. D 86, 123515 (2012)]. The first is that one cannot use the tunneling picture to obtain the temperature and particle production rate in the Friedman-Robertson-Walker space-time. The second comment raised by Firouzjaee is that the Hawking-like radiation model for inflation presented in [Modak and Singleton; S. K. Modak and D. Singleton, Int. J. Mod. Phys. D 21, 1242020 (2012)] is inconsistent with the observed scalar and tensor perturbation spectrum. We show that the first comment is beside the point-we do not use the tunneling method in our papers [Modak and Singleton; Modak and Singleton]. The second criticism by Firouzjaee comes from the author evaluating quantities at different times-he evaluates the parameters of our model at the beginning of inflation and then compares this with the scalar and tensor perturbations evaluated at the horizon exit point.From Physical Review D, Vol.89(6), 68302, available online: http://dx.doi.org/10.1103/PhysRevD.89.068302. Copyright ©2014 by American Physical Society.Publisher version: https://doi.org/10.1103/PhysRevD.89.06830
Increased duplex stabilization in porphyrin-LNA zipper arrays with structure dependent exciton coupling
No full textPorphyrins were attached to LNA uridine building blocks via rigid 5-acetylene or more flexible propargyl-amide linkers and incorporated into DNA strands. The systems show a greatly increased thermodynamic stability when using as little as three porphyrins in a zipper arrangement. Thermodynamic analysis reveals clustering of the strands into more ordered duplexes with both greater negative ??S and ??H values, and less ordered duplexes with small positive ??S differences, depending on the combination of linkers used. The exciton coupling between the porphyrins is dependent on the flanking DNA sequence in the single stranded form, and on the nature of the linker between the nucleobase and the porphyrin in the double stranded form; it is, however, also strongly influenced by intermolecular interactions. This system is suitable for the formation of stable helical chromophore arrays with sequence and structure dependent exciton coupling
Coagulation-fibrinolysis is more enhanced in twin than in singleton pregnancies
No full textAims: To examine whether coagulation-fibrinolysis in late pregnancy in women with twin pregnancies is more pronounced than in women with singleton pregnancies.
Patients and methods: The plasma levels of D-dimer, fibrinogen/fibrin degradation products (FDP), and fibrinogen, the platelet count, and the antithrombin activity were assessed from 3 weeks before delivery until postpartum day 7 in 48 women (24 singleton and 24 twin pregnancies) without preeclampsia who underwent cesarean sections.
Results: Women with singleton or twin pregnancies gave birth at 37.3±1.2 weeks or 35.2±1.4 weeks, respectively. Compared with singleton mothers, prenatal D-dimer and FDP levels were consistently and significantly higher among women with twin pregnancies. A significantly larger proportion of twin mothers exhibited prenatal levels of D-dimer >5.0 μg/mL, FDP >10.0 μg/mL, fibrinogen <420 mg/mL and antithrombin activity <70%. In addition, prenatal antithrombin activity in plasma was significantly lower.
Conclusions: Coagulation-fibrinolysis is more enhanced in women with twin gestation than in women with singleton gestation
Auditory salience: A study of the influence of timbre attributes using the additional singleton paradigm
No full textAttention is a set of processes that allows a listener to select
certain relevant information in a sound scene and to ignore others.
However, some sounds that are not relevant to process sometimes manage
to capture our attention. This effect is known as salience. In the
present study, the influence of two timbre attributes, brightness and
roughness, on the salience of a sound was investigated. To address this
issue, an additional singleton paradigm was implemented to provide an
indirect measure of the influence of a sound feature on its salience. We
examined how performance on an auditory discrimination task was degraded
in the presence of an irrelevant sound, called singleton. In a
first experiment, the singleton was made brighter (higher spectral
centroid) and its presence produced a behavioral cost, showing that this
attribute has an effect on salience. In two following experiments, we
analyzed the influence of different values of brightness on one hand,
and different values of roughness (characterized by the amplitude
modulation depth) on the other hand. The results confirmed that both
brightness and roughness have a significant effect on salience.
Moreover, the higher the spectral centroid or the amplitude modulation
depth of the singleton, the higher the error rates and response times.
This revealed that attentional capture modulates with variations of
timbre attributes. This work opens new perspectives for the study of
auditory salience and the understanding of bottom-up mechanisms that
underly it
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