bluuebunny/crossref_metadata_2025_split huggingface dataset:
Orbital effects of a monochromatic plane gravitational wave with ultra-low frequency incident on a gravitationally bound two-body system
Authors: Iorio Lorenzo 
Published: September 2014

Abstract
We analytically compute the long-term orbital variations of a test particle orbiting a central body acted upon by an incident monochromatic plane gravitational wave. We assume that the characteristic size of the perturbed two-body system is much smaller than the wavelength of the wave. Moreover, we also suppose that the wave's frequency

ν
g

is much smaller than the particle's orbital one n
b. We make neither a priori assumptions about the direction of the wavevector

k
̂

nor on the orbital configuration of the particle. While the semi-major axis a is left unaffected, the eccentricity e, the inclination I, the longitude of the ascending node Ω, the longitude of pericenter ϖ and the mean anomaly ℳ undergo non-vanishing long-term changes of the form

d
Ψ
/
d
t
=
F
(

K

i
j

;
e
,
I
,
Ω
,
ω
)
,
Ψ
=
e
,
I
,
Ω
,
ϖ
,
ℳ

, where

K

i
j

,

i
,
j
=
1
,
2
,
3

are the coefficients of the tidal matrix K. Thus, in addition to the variations of its orientation in space, the shape of the orbit would be altered as well. Strictly speaking, such effects are not secular trends because of the slow modulation introduced by K and by the orbital elements themselves: they exhibit peculiar long-term temporal patterns which would be potentially of help for their detection in multidecadal analyses of extended data records of planetary observations of various kinds. In particular, they could be useful in performing independent tests of the inflation-driven ultra-low gravitational waves whose imprint may have been indirectly detected in the Cosmic Microwave Background by the Earth-based experiment BICEP2. Our calculation holds, in general, for any gravitationally bound two-body system whose orbital frequency n
b is much larger than the frequency

ν
g

of the external wave, like, e.g., extrasolar planets and the stars orbiting the Galactic black hole. It is also valid for a generic perturbation of tidal type with constant coefficients over timescales of the order of the orbital period of the perturbed particle.
The Legal Consequences of Mandating High Stakes Decisions Based on Low Quality Information: Teacher Evaluation in the Race-to-the-Top Era
Authors: Baker Bruce D. , Oluwole Joseph O. , Green III Preston C. 
Published: September 2014

In this article, we explain how overly prescriptive, rigid state statutory and regulatory policy frameworks regarding teacher evaluation, tenure and employment decisions outstrip the statistical reliability and validity of proposed measures of teaching effectiveness. We begin with a discussion of the emergence of highly prescriptive state legislation regarding the use of student testing data within teacher evaluation systems, specifically for purposes of making employment decisions. Next, we explain the most problematic features of those policies, which include a) requirements that test-based measures constitute fixed, non-negotiable weight in final decisions, b) that test-based measures are used to place teachers into categories of effectiveness by applying numerical cutoffs beyond the precision or accuracy of the available data, and c) that professional judgment is removed from personnel decisions by legislating (or regulating) specific actions be taken when teachers fall into certain performance categories. In the subsequent section, we point out that different types of measures are being developed and implemented across states, and we explain that while value-added metrics in particular are, in fact designed to estimate a teacher’s effect on student outcomes, descriptive growth percentile measures are not designed for making such inference and thus have no place in making determinations regarding teacher effectiveness. We also explain that, due to the properties of value-added estimates, they have no place in making high-stakes decisions based on rigid policy frameworks like those described herein. We evaluate the legal implications of rigid reliance on measures of teaching effectiveness that a) lack reliability and b) may be entirely invalid.
Value-added Teacher Estimates as Part of Teacher Evaluations: Exploring the Effects of Data and Model Specifications on the Stability of Teacher Value-added Scores
Authors: Kersting Nicole B , Chen Mei-Kuang , Stigler James W. 
Published: September 2014

In this study we explored the effects of statistical controls, single versus multiple cohort models, and student sample size on the stability of teacher value-added estimates (VAEs). We estimated VAEs for all 5th grade mathematics teachers in a large urban district by fitting two level mixed models using four cohorts of student data. We found that student sample size had the largest effect on changes in teachers’ relative standing and designation into performance groups, while control variables affected VAEs only minimally. However, we also found that teacher VAEs showed a fair degree of stability; year-to-year correlations ranged between .62 and .66, and changes in teacher effectiveness systematically varied by teacher experience, with beginning teachers showing the largest improvements over the four years under study. Our results suggest that some model specifications are likely to produce teacher value-added scores that can reflect meaningful differences in teachers while we also found that other models might produce VAEs that might be unreliable.
Das HeBIS Discovery System
Authors: Sunckel Bettina , Reh Uwe , Nienerza Heike 
Published: September 2014

Zusammenfassung:
Die HeBIS-Verbundzentrale bietet das HeBIS Discovery System (HDS) als Dienstleistung für interessierte Mitgliedsbibliotheken an. Der Service beinhaltet eine Rechercheoberfläche mit Suchunterstützung durch eine moderne Suchmaschine, Erweiterung des Suchraums mit Inhalten aus Datenbanken und Volltexten durch einen Resource Discovery Service und alle gewohnten Funktionen eines lokalen OPACs. Technisch besteht HDS aus dem Open-Source-OPAC VuFind, der Suchmaschine Solr, dem Discovery-Service EDS und dem ReDi-Linkresolver. Dieser Beitrag geht auf die Projektstruktur und die Erfahrungen bei der kooperativen Entwicklung ein.
„suchen“ – ein Prototyp zum Vergleich von Discovery-Diensten
Authors: Hagenbruch André , Heise Miriam 
Published: September 2014

Zusammenfassung:
Wir beschreiben den Prototypen einer Webanwendung, die zwei unterschiedliche Discovery-Dienste und einen OPAC-basierten Suchmaschinenindex integriert. Zunächst skizzieren wir die technische Architektur, geben dann einen Überblick über die Metadaten und APIs der eingesetzten Discovery-Dienste und berichten im Anschluss von den Nutzererfahrungen, die wir aus dem Feedback der Testpersonen gewonnen haben. Zuletzt geben wir einen Überblick über die Ergebnisse unseres Tests und umreißen die Richtung, in die wir unsere Entwicklung fortführen wollen.
On Barnes beta distributions, Selberg integral and Riemann xi
Authors: Ostrovsky Dmitry 
Published: September 2014

Abstract
The theory of Barnes beta probability distributions is advanced and related to the Riemann xi function.
The scaling invariance, multiplication formula, and Shintani factorization of Barnes multiple gamma functions are reviewed
using the approach of Ruijsenaars and shown to imply novel properties of Barnes beta distributions. The applications are given to the meromorphic extension of the Selberg integral as a function of its dimension and the scaling invariance of the underlying probability distribution. This probability distribution in the critical case is described and conjectured to be the distribution of the derivative martingale.
The Jacobi triple product is interpreted probabilistically resulting in an approximation of the Riemann xi function by the Mellin transform of the logarithm of a limit of Barnes beta distributions.
Homological aspects of the dual Auslander transpose
Authors: Tang Xi , Huang Zhaoyong 
Published: September 2014

Abstract
As a dual of the
Auslander transpose of modules, we introduce and study the
cotranspose of modules with respect to a semidualizing module C.
Then using it we introduce n-C-cotorsionfree modules, and show
that n-C-cotorsionfree modules possess many dual properties of
n-torsionfree modules. In particular, we show that
n-C-cotorsionfree modules are useful in characterizing the Bass
class and investigating the approximation theory for modules.
Moreover, we study n-cotorsionfree modules over Artin algebras and
answer negatively an open question of Huang and Huang posed in 2012.
A core domain of the BMP2 proregion is sufficient for the biogenesis of mature homodimeric growth factor
Authors: Kuhfahl Silke , Schwarz Elisabeth 
Published: September 2014

Abstract:
The large proregions of cystine knot growth factors exert several important biological functions. Previous results have shown that the proregion of BMP2 retards the activity of the mature growth factor. Hitherto, no information exists about the function of the BMP2 proregion during the biogenesis of the mature growth factor. Here, evidence is presented that the proregion is required for the secretion of BMP2 when present in covalent linkage to the mature domain. In trans complementation, i.e., with the proregion encoded by a separate plasmid, does not result in secretion of homodimeric mature growth factor. An extended variant of a previously in vitro characterized subdomain of the proregion, when being present in covalent linkage to the mature growth factor, restores secretion of mature BMP2, albeit at a reduced level.
Vibration Characteristics of Squeeze Film Damper during Maneuver Flight
Authors: Wang Siji , Liao Mingfu , Li Wei 
Published: September 2014

AbstractThe rotor systems of an aero engine will endure additional centrifugal force and gyroscopic moment during maneuver flight. A maneuver fly mechanical simulator is designed and experimental investigations on dynamics of squeeze film damper (SFD) under the different additional centrifugal force and gyroscopic moment are carried out. The results show that the maneuver flight weaken effectiveness of the SFD, the additional centrifugal force and gyroscopic moment caused by maneuver flight will change film damping, film stiffness. And the influence of maneuver flight can be effective relieved by increasing the film clearance.
Is Intervertebral Cement Leakage a Risk Factor for New Adjacent Vertebral Collapse?
Authors: Churojana Anchalee , Songsaeng Dittapong , Khumtong Rujimas , Suwanbundit Anek , Saliou Guillaume 
Published: September 2014

This retrospective study evaluated the relationship between intervertebral cement leakage and new adjacent vertebral fracture and describes the different characteristics of cement leakage. Increased risk of new adjacent vertebral fracture (NF) has been reported to be a complication of cement leakage in vertebroplasty. In our observation, an incidental intervertebral cement leakage may occur during vertebroplasty but is commonly asymptomatic. The study focused on osteoporotic collapse patients who had percutaneous vertebroplasty (PV) between 2005 and 2007. We divided patients into leakage and non-leakage groups and compared the incidence of NF. Leakage characteristics were divided into three types: Type I intervertebral-extradiscal leakage, Type II intradiscal leakage and Type III combined leakage. Visual analog scale for pain and the Karnofsky Performance Status at 24 h, three months, six months and one year were compared between groups and types of leakages. Among 148 PVs (102 patients) there were 30 leakages (20.27%) and 21(14.19%) NFs. The incidence of NF did not significantly differ between leakage and non-leakage groups (P<0.05). Type II was the most common type of leakage (15/30). Reduction of average pain and improvement of Karnofsky Performance Status score did not differ between groups (P<0.05). Type II had decreased pain score < type I and III at 24 h (P < 0.01), three months and six months (P < 0.1) but not at one year (P<0.10). Type II also had decreased pain score < non-leakage group only at 24 h (P<0.05). Intervertebral cement leakage is not an increased risk for NF, influenced outcomes of pain relief or improvement of physical function. Intradiscal leakage (Type II) is the most common characteristic of cement leakage and probably related to delayed pain relief.
Retrospective Review of Procedural Parameters and Outcomes of Percutaneous Vertebroplasty in 673 Patients
Authors: Kim Benny S. , Hum Barbara , Park Jung Cheol , Choi In Sup 
Published: September 2014

Percutaneous vertebroplasty (PVP) is a minimally invasive procedure to treat back pain secondary to osteoporotic vertebral compression fractures (VCF). This study aims to review our techniques and outcomes in patients with VCF. Outcomes of all patients who underwent PVP at our institution from 1998 to 2014 were retrospectively collected from medical records and follow-up telephone interviews. 1174 PVP procedures for VCF in 673 patients were identified to have complete follow-up data. Patients with inadequate data were excluded from the analysis. Procedural aspects such as unipedicular or bipedicular access, vertebral region treated, amount of cement injected into vertebrae, number of levels treated at a single session, refracture rates and location, presence of a necrotic cavity, and pain outcomes were examined. Excellent rates of improvement of back pain for both single level and multilevel PVP were achieved in 92% of patients. Unipedicular or bipedicular approach, cement volume, vertebral region treated, cement extravasation, and presence of a necrotic cavity did not affect pain outcomes or refracture rates. Fractures that did develop after PVP were often adjacent and occurred earlier than distant level fractures. Lumbar vertebrae required more cement than thoracic vertebrae. PVP provides excellent rates of pain relief in both single and multilevel procedures. The procedural aspects evaluated did not affect pain outcome or refracture rates. Adjacent refractures tended to occur sooner than distant ones.
Short-term variation in plasma mitotane levels confirms the importance of trough level monitoring
Authors: Kerkhofs T M A , Derijks L J J , Ettaieb M H T , Eekhoff E M W , Neef C , Gelderblom H , den Hartigh J , Guchelaar H J , Haak H R 
Published: September 2014

ObjectiveMitotane is the drug of choice in patients with adrenocortical carcinoma. The anti-neoplastic effect is correlated with mitotane plasma levels, which render it crucial to reach and maintain the concentration above 14 mg/l. However, mitotane pharmacokinetics is poorly understood. The aim of this study was to investigate the variation in plasma mitotane levels during the day and the influence of a single morning dose.DesignA prospective case–control study was conducted to investigate the variation in plasma mitotane levels.MethodsPatients who had been treated for at least 24 weeks and had reached the therapeutic plasma level (14 mg/l) at least once were eligible. In the first group, mitotane levels were determined hourly for the duration of 8 h after administration of a single morning dose. In the second group, mitotane levels were assessed similarly without administration of a morning dose.ResultsTen patients were included in this study, and three patients participated in both groups. Median plasma level at baseline was 16.2 mg/l (range 11.3–23.3 mg/l) in the first group (n=7) and 17.0 mg/l (13.7–23.8) in the second group (n=6). Plasma levels displayed a median increase compared with baseline of 24% (range 6–42%) att=4 after morning dose and a change of 13% (range −14 to 33%) att=4 without morning dose (P=0.02).ConclusionA substantial increase in mitotane plasma levels was observed in steady-state patients within a period of 8 h after morning dosing. Without morning dose, mitotane curves showed a variable profile throughout the day. This implies that random sampling could yield incidentally high levels. For this reason, we recommend early-morning trough sampling as standard management in monitoring mitotane treatment.
Asthma and Food Allergy Management in Chicago Public Schools
Authors: Gupta Ruchi S. , Rivkina Victoria , DeSantiago-Cardenas Lilliana , Smith Bridget , Harvey-Gintoft Blair , Whyte Stephanie A. 
Published: September 2014

OBJECTIVES:
This study aimed to characterize asthma and food allergy reporting and management in Chicago Public Schools.

METHODS:
Demographic and health data for students who have asthma and food allergy were extracted from the Chicago Public Schools database. Demographic and geographic variability and the existence of school health management plans were analyzed, and multiple logistic regression models were computed. Home addresses were geocoded to create maps of case counts per community area.

RESULTS:
Approximately 18 000 asthmatic and 4000 food allergic students were identified. Of asthmatic students, 9.3% had a food allergy; of food allergic students, 40.1% had asthma. Asthma odds were significantly higher among black and Hispanic students (odds ratio [OR] = 2.3 and 1.3, respectively), whereas food allergy odds were significantly higher among black students (OR = 1.1; 95% confidence interval [CI], 1.0–1.3) and significantly lower among Hispanic students (OR = 0.8; 95% CI, 0.7–0.9). Only 24.3% of students who had asthma and 50.9% of students who had food allergy had a school health management plan on file. Odds of having a school health management plan were significantly higher among students with both conditions, but the likelihood of having a plan on file was significantly lower among racial/ethnic minority and low-income students, regardless of medical condition.

CONCLUSIONS:
Only 1 in 4 students who have asthma and half of food allergic students have health management plans in schools, with lower numbers among minority and low-income students. Improving chronic disease reporting and access to school health management plans is critical.
Sibling Bullying and Risk of Depression, Anxiety, and Self-Harm: A Prospective Cohort Study
Authors: Bowes Lucy , Wolke Dieter , Joinson Carol , Lereya Suzet Tanya , Lewis Glyn 
Published: September 2014

OBJECTIVES:Being the victim of peer bullying is associated with increased risk of psychopathology, yet it is not known whether similar experiences of bullying increase risk of psychiatric disorder when the perpetrator is a sibling. We tested whether being bullied by a sibling is prospectively associated with depression, anxiety, and self-harm in early adulthood.METHODS:We conducted a longitudinal study using data from &gt;6900 participants of a UK community-based birth cohort (Avon Longitudinal Study of Parents and Children) who reported on sibling bullying at 12 years. Our main outcome measures were depression, anxiety, and self-harm, assessed using the Clinical Interview Schedule–Revised during clinic assessments when participants were 18.RESULTS:Children who were frequently bullied were approximately twice as likely to have depression (odds ratio [OR] = 2.16; 95% confidence interval [CI], 1.33–3.51; P &lt; .001), self-harm (OR = 2.56; 95% CI, 1.63–4.02; P &lt; .001), and anxiety (OR = 1.83; 95% CI, 1.19–2.81; P &lt; .001) as children who were not bullied by siblings. The ORs were only slightly attenuated after adjustment for a range of confounding individual, family, and peer factors. The population-attributable fractions suggested that 13.0% (95% CI, 1.0%–24.7%) of depression and 19.3% (95% CI, 7.6%–29.6%) of self-harm could be explained by being the victim of sibling bullying if these were causal relationships.CONCLUSIONS:Being bullied by a sibling is a potential risk factor for depression and self-harm in early adulthood. Our results suggest that interventions designed to target sibling bullying should be devised and evaluated.
Dating Violence, Childhood Maltreatment, and BMI From Adolescence to Young Adulthood
Authors: Clark Cari Jo , Spencer Rachael A. , Everson-Rose Susan A. , Brady Sonya S. , Mason Susan M. , Connett John E. , Henderson Kimberly M. , To Michelle , Suglia Shakira F. 
Published: September 2014

BACKGROUND AND OBJECTIVES:This study tested whether dating violence (DV) victimization is associated with increases in BMI across the transition from adolescence to young adulthood and whether gender and previous exposure to child maltreatment modify such increases.METHODS:Data were from participants (N = 9295; 49.9% female) in the National Longitudinal Study of Adolescent Health. BMI was calculated from measured height and weight at waves 2, 3, and 4 of the study. DV victimization was measured at waves 2, 3, and 4 by using items from the revised Conflict Tactics Scales. Linear regression by using generalized estimating equations with robust SEs was used to test the association. Models were stratified according to gender and history of child maltreatment.RESULTS:From baseline to wave 4, BMI increased on average 6.5 units (95% confidence interval [CI]: 6.2–6.7) and 6.8 units (95% CI: 6.5–7.1) among men and women, respectively, and nearly one-half (45.5% of men; 43.9% of women) reported DV at some point. In stratified models, DV victimization (β: 0.3 [95% CI: 0.0–0.6]) independently predicted BMI increase over time in women. Exposure to childhood sexual abuse magnified the increase in BMI associated with DV victimization (β: 1.3 [95% CI: 0.3–2.3]). No other types of childhood maltreatment were significant modifiers of the DV–BMI association. Violence victimization was not associated with BMI among men.CONCLUSIONS:Screening and support for DV victims, especially women who have also experienced childhood maltreatment, may be warranted to reduce the likelihood of health consequences associated with victimization.
Electrosynthesized Polystyrene Sulphonate-Capped Zinc Oxide Nanoparticles as Electrode Modifiers for Sensing Devices
Authors: Sportelli Maria C. , Hötger Diana , Picca Rosaria A. , Manoli Kyriaki , Kranz Christine , Mizaikoff Boris , Torsi Luisa , Cioffi Nicola 
Published: September 2014

ABSTRACTZnO nanoparticles were prepared by a green electrochemical synthesis method applying low current densities followed by a thermal treatment. Sodium polystyrene sulphonate (PSS) was used as stabilizer in the electrolytic aqueous medium due to its biocompatibility and stability. The as-prepared nanocolloids were then annealed to improve their stability, and then converted via hydroxide species into stoichiometric oxide. Different calcination temperatures were studied. ZnO@PSS nanomaterials were deposited onto SiO2/Si substrates, in part in combination with an organic semiconductor layer to evaluate their influence on organic field effect transistors (OFETs). All nanomaterials and composite layers were characterized by morphological and spectroscopic techniques. Promising results regarding the use of ZnO@PSS in OFETs could be demonstrated.