bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of dominant traveling 10-day wave components using long-term MERRA-2 database
Authors: Huang Chunming , Li Wei , Zhang Shaodong , Chen Gang , Huang Kaiming , Gong Yun 
Published: April 2021

AbstractThe eastward- and westward-traveling 10-day waves with zonal wavenumbers up to 6 from surface to the middle mesosphere during the recent 12 years from 2007 to 2018 are deduced from MERRA-2 data. On the basis of climatology study, the westward-propagating wave with zonal wave number 1 (W1) and eastward-propagating waves with zonal wave numbers 1 (E1) and 2 (E2) are identified as the dominant traveling ones. They are all active at mid- and high-latitudes above the troposphere and display notable month-to-month variations. The W1 and E2 waves are strong in the NH from December to March and in the SH from June to October, respectively, while the E1 wave is active in the SH from August to October and also in the NH from December to February. Further case study on E1 and E2 waves shows that their latitude–altitude structures are dependent on the transmission condition of the background atmosphere. The presence of these two waves in the stratosphere and mesosphere might have originated from the downward-propagating wave excited in the mesosphere by the mean flow instability, the upward-propagating wave from the troposphere, and/or in situ excited wave in the stratosphere. The two eastward waves can exert strong zonal forcing on the mean flow in the stratosphere and mesosphere in specific periods. Compared with E2 wave, the dramatic forcing from the E1 waves is located in the poleward regions.
Phytochemistry and pharmacological studies of Plumbago zeylanica L.: a medicinal plant review
Authors: Shukla Babita , Saxena Sumedha , Usmani Shazia , Kushwaha Poonam 
Published: April 2021

AbstractPlumbago zeylanicaL. (Plumbaginaceae) commonly known, as chitrak is pharmacologically important plant. Various studies have been undertaken to assess the pharmacological potential of different parts of the plant namely like roots, stem, flower, and leaves as antimicrobial, hepatoprotective, anticancer, antifertility, antiulcer, antifungal and wound healing. The intention of the present review is to deliver a concise account on its ethnobotanical uses, phytochemistry with an in-depth study of its phytoconstituents, facts and prospects of its potential pharmacological activities of this golden plant. An extensive literature survey was undertaken through different online platforms viz. Google Scholar and online databases namely PubMed, Science Direct and Springer. All papers based on traditional medicinal uses and pharmacological properties were included. Sixty three research articles and review articles were found to be apt for inclusion into the review. About 150 articles were retrieved for the purpose. The elaborative results vindicated thatPlumbago zeylanicaL. holds significant prospects in major health conditions such as diabetes, cardiovascular disorders, ulcer, liver problems, obesity, wound healing, cancer etc.
Attitudes Toward Intimate Partner Violence in Dyadic Perspective: Evidence From Sub-Saharan Africa
Authors: Behrman Julia , Frye Margaret 
Published: April 2021

AbstractAlthough intimate partner violence (IPV) is inherently a relational event shaped by couple-level factors, most empirical examinations of IPV-related attitudes have used individuals as the unit of analysis. We apply a dyadic perspective to the study of attitudes about the acceptability of IPV, harnessing couple-level data from 33 countries in sub-Saharan Africa, a region characterized by particularly high levels of both the incidence and acceptance of IPV. We document considerable geographic heterogeneity in the distribution of attitudinal concordance or discordance regarding the acceptability of IPV within couples, a descriptive finding that is overlooked by studies focused on individuals as the unit of analysis. In addition, applying a dyadic perspective to the correlates of attitudinal concordance, we demonstrate that joint exposure to schooling, work, and media is more predictive of joint rejection of IPV than are singular exposures of wives or husbands. Finally, we show that distinct combinations of attitudes within couples are associated with differential likelihoods of wives reporting having recently experienced emotional, physical, or sexual IPV. In particular, when both partners reject IPV, wives are significantly less likely to report experiencing each type of IPV in the past year compared with any other combination of attitudes. Our results reveal that a dyadic perspective provides a comprehensive understanding of intracouple contexts that enhances our perspective on these important demographic outcomes.
Regulating Conflicts of Interest in Medicine Through Public Disclosure: Evidence from a Physician Payments Sunshine Law
Authors: Chao Matthew , Larkin Ian 
Published: April 2021

Hospital and healthcare administrators name high prescription drug costs as one of their largest problems. A significant body of research demonstrates that meals and honoraria from pharmaceutical firms to physicians leads to higher prescribing of expensive, brand name drugs, despite little difference in efficacy. Some administrators and scholars have advocated for mandatory disclosure of these payments in order to reduce this conflict of interest, but many practitioners believe disclosure has little effect on prescribing, and the empirical evidence is mixed. This paper uses a quasi-experiment of a 2009 payment disclosure policy in Massachusetts to estimate the causal impact of public disclosure on prescribing. The comprehensive data set includes all retail prescriptions for 262 drugs in nine drug classes written by 5,730 physicians in five states over 48 months. We show a significant postdisclosure reduction in brand name drug prescriptions by Massachusetts physicians, relative to control physicians in other states. These effects are driven by heavy prescribers of brand name drugs in the prepolicy period, particularly for drugs with large prepolicy sales forces. Effects are also detected before the first data were released, implying that the effects are not because patients or administrators responded to the disclosed payments. Instead, some physicians may have changed their payments and prescriptions behavior to avoid appearing biased. Taken in tandem with the many studies showing that pharmaceutical industry payments influence prescribing, this study suggests a strong role for mandatory public disclosure in reducing conflicts of interest in medicine and costly prescribing of brand name drugs. This paper was accepted by Stefan Scholtes, healthcare management.
Saturable absorber based on the broadband composite-liquid-filled dual-core photonic crystal fiber coupler
Authors: Li Jing , Wang Chuncan , Wang Peng 
Published: April 2021

A dual-core photonic crystal fiber coupler based on the heavily

G
e
O

2

-doped-silica-air cladding and composite-liquid (

C
S

2

and

C

2

C
l

4

) core is proposed to obtain the saturable absorber (SA). It is demonstrated by numerical simulations that the SA with appropriate parameters can exhibit the normal dispersion, high nonlinearity, and flat profile of the linear coupling lengths in the wavelength range from 1500 to 2000 nm. The input pulses with durations

>

2

p
s

exhibit relatively high transmissions and low saturable powers mainly because of the strong effect of stimulated Raman scattering in the SA. Consequently, the SA with the

G
e
O

2

concentration ratio of 80 mol% can be employed in both the erbium- and thulium-doped fiber mode-locked lasers with all-normal or large net-normal dispersion. The dissipative soliton pulses with tunable wavelengths can be obtained in both cases.
Linear cavity tapered fiber sensor using amplified phase-shift cavity ring-down spectroscopy
Authors: Ayaz Rana M. Armaghan , Uysalli Yigit , Morova Berna , Kiraz Alper 
Published: April 2021

Phase-shift cavity ring-down spectroscopy (PS-CRDS) enables the measurement of minute fluctuations in optical loss encountered by an intensity modulated laser beam via lock-in demodulation of the accumulated signal phase as the laser beam propagates through the cavity. A linear fiber cavity containing two highly reflective fiber Bragg gratings (FBGs) and a tapered fiber is a favorable cavity geometry for sensor applications due to its compact nature and wide availability of its components at telecom wavelengths. However, due to the optical absorption of water, usage of telecom wavelengths for sensing of aqueous solutions degrades the sensitivity. This problem can be worked around via an optical amplifier placed inside the fiber cavity, compensating for intrinsic cavity losses. In this work, we demonstrate amplified PS-CRDS using such a linear cavity tapered fiber sensor utilizing an optical amplifier that enables the use of thinner tapered fibers, thus achieving higher sensitivities. We also employ continuous laser wavelength sweeps and analyze peak-to-peak PSs of individual cavity modes instead of using laser-cavity mode locking with the Pound–Drever–Hall technique. This enables further simplification of the experimental arrangement without compromising sensor performance. To test the performance of the reported sensor, solutions of varying sucrose concentrations in deionized water were measured systematically by tracking the average peak-to-peak PS

⟨

ϕ

pp

⟩

of the cavity modes. Tapered fibers with waist diameters (

D

t
a
p
e
r

) around 2.2 µm were used during the experiment and limit of detection (LOD) values were measured down to 2.7 µM, corresponding to

1.01
×

10

−
7

R
I
U

. The reported LOD values can be further improved by mechanical stabilization and thermal control of the device by the use of FBGs with higher reflectivity, by applying automatic optical gain control, and by spectral filtering to remove errors caused by amplified spontaneous emission. The presented concentration sensing device can be suitable for developing compact and highly sensitive, label-free optofluidic sensors.
10  kHz two-color OH PLIF thermometry using a single burst-mode OPO
Authors: Hsu Paul S. , Jiang Naibo , Felver Josef J. , Lauriola Daniel K. , Danehy Paul M. , Roy Sukesh 
Published: April 2021

10-kHz hydroxyl radical (OH) two-color planar laser-induced fluorescence (TC-PLIF) thermometry was demonstrated with a single burst-mode optical parametric oscillator (OPO) and a single camera. A fast, dual-wavelength switched seed laser enabled a high-energy, high-repetition-rate burst-mode laser to generate two 10-kHz pulse trains at wavelengths of

∼

354.8

n
m

. The two pulse trains are colinear with 3 µs time interval between the pulse pairs. The injection-seeded OPO efficiently converts the burst-mode laser output to 285.62 and 285.67 nm to excite the

Q

2

(

12

)

and

P

1

(

8

)

OH transitions. PLIF images were collected from each of the two excitation transitions, and intensity ratios from the images were used to determine local temperatures. The development of fast, dual-wavelength switching, burst-mode OPO technology significantly reduces the experimental complexity of the high-speed TC-PLIF thermometry and simplifies its implementation in harsh combustion and flow test facilities.
Emotional imagination of negative situations: Functional neuroimaging in anorexia and bulimia
Authors: D’Agata Federico , Caroppo Paola , Spalatro Angela , Lavagnino Luca , Abbate Daga Giovanni , Boghi Andrea , Bergui Mauro , Cicerale Alessandro , Vitiello Benedetto , Fassino Secondo , Derntl Birgit , Amianto Federico 
Published: April 2021

AimThe present study aims to extend the knowledge of the neural correlates of emotion processing in first episode subjects affected by anorexia nervosa (AN) or bulimia nervosa (BN). We applied an emotional distress paradigm targeting negative emotions thought to be relevant for interpersonal difficulties and therapeutic resistance mechanisms.MethodsThe current study applied to 44 female participants with newly diagnosed AN or BN and 20 matched controls a neuroimaging paradigm eliciting affective responses. The measurements also included an extensive assessment comprising clinical scales, neuropsychological tests, measures of emotion processing and empathy.ResultsAN and BN did not differ from controls in terms of emotional response, emotion matching, self-reported empathy and cognitive performance. However, eating disorder and psychopathological clinical scores, as well as alexithymia levels, were increased in AN and BN. On a neural level, no significant group differences emerged, even when focusing on a region of interest selected a priori: the amygdala. Some interesting findings put in relation the hippocampal activity with the level of Body Dissatisfaction of the participants, the relative importance of the key nodes for the common network in the decoding of different emotions (BN = right amygdala, AN = anterior cingulate area), and the qualitative profile of the deactivations.ConclusionsOur data do not support the hypothesis that participants with AN or BN display reduced emotional responsiveness. However, peculiar characteristics in emotion processing could be associated to the three different groups. Therefore, relational difficulties in eating disorders, as well as therapeutic resistance, could be not secondary to a simple difficulty in feeling and identifying basic negative emotions in AN and BN participants.
The association between male involvement in institutional delivery and women’s use of institutional delivery in Debre Tabor town, North West Ethiopia: Community based survey
Authors: Tessema Kassanesh Melese , Mihirete Kebadnew Mulatu , Mengesha Endalkachew Worku , Nigussie Azezu Asres , Wondie Awoke Giletew 
Published: April 2021

Background
Maternal deaths remain high in Ethiopia mainly due to poor maternal health service utilization. Despite men are the chief decision-makers and economically dominant in Ethiopia, the impact of their involvement on maternal health services utilization is not clear. This study aimed to assess the association between male involvement and women’s use of institutional delivery, and factors influencing male partners’ involvement in institutional delivery.

Methods
A community based cross-sectional study was conducted between March and May, 2019. A total of 477 married men who have children less than one year of age were interviewed. Face-to-face interviews using a pre-tested and structured questionnaire were used for data collection. Bivariate and multiple logistic regressions were carried out. SPSS version 23 was used for data analysis.

Results
Overall 181 (37.9%) husbands/partners were involved in institutional delivery for the most recent child birth. Male partners involvement in institutional delivery was strongly associated with an increased odds of attending institutional delivery by spouse [AOR: 66.2, 95% CI: 24.8, 177.0]. Education [AOR: 0.33, 95% CI: 0.18–0.59], knowledge on maternal health [AOR: 1.67, 95% CI: 1.11–2.50], favourable attitude towards institutional delivery [AOR: 1.83, 95% CI: 1.23–2.71], and no fear while supporting spouse [AOR: 2.65, 95% CI: 1.28–5.50] were positively associated with male partners involvement in institutional delivery.

Conclusion
Male partner’s involvement in institutional delivery was inadequate. This study reported a significant beneficial impact of male involvement on maternal health through improved utilisation of institutional delivery. Therefore, maternal health interventions should target husbands as consumers of maternal health services, and healthcare/government policies that isolate or discourage men from having active engagement in maternal health should be improved.
Linguistic hybridity and learner identity: translingual practice among plurilinguals in the educational setting
Authors: Lankiewicz Hadrian Aleksander 
Published: April 2021

Capitalizing on the ecological approach to language learning (van Lier, 2004; Kramsch, 2008) and the conceptualization of language as a local practice (Pennycook, 2010) as well as languaging (Jørgensen, 2008), accounting for the continuity of linguistic phenomena rather than a discriminatory perception of linguistic properties, we intend to delve into the problem of linguistic hybridity as a sign of L2 learner identity. A direct inspiration for the study, as exemplified in the title, is the concept of metrolingualism (Otsuji, Pennycook, 2010), which offers a potential to be very informative for the study of identity issues inscribed in language. Metrolingualism connotes linguistic hybridity, which refers to something unnatural, untypical, not conforming to the norm. Positing the continuity of language use and symbolic competence (Kramsch, Whiteside, 2008), we assume after van Lier (2004) that language is not a fixed code but socially constructed entity which mingles with personal experiences shaped by social context and activates power-related issues in language use. The aim of the paper is to delve into discursive practices of students learning/using more than one L2 in the educational setting. An examination of their narratives and their languaging about language (Swain, 2006) discloses how they position themselves as L2 language users.
ADAPTED TO FEAR: FEARLESSNESS ABOUT DEATH IS ASSOCIATED WITH HEART RATE VARIABILITY
Authors: Perkins Natalie M. , Forrest Lauren N. , Kunstman Jonathan W. , Smith April R. 
Published: April 2021

Objective: Capability for suicide, which refers to an individual's ability to enact potentially lethal harm to oneself and overcome the fear of dying, is an empirically supported component of the Interpersonal-Psychological Theory of Suicide. Although an abundance of research has examined capability for suicide through the use of self-report data, little research has assessed specific psychophysiological mechanisms that may contribute to capability for suicide. We assessed relationships between capability for suicide (fearlessness about death and pain tolerance), high frequency heart rate variability (HF HRV), and subjectively reported fear during a death related event. Given that greater HRV is associated with calmness and lack of distress, we predicted that HRV during a fearful event would be positively associated with the capability for suicide.Method: Data were collected from 101 undergraduates. Participants self-reported fearlessness about death and had their pain tolerance assessed with an algometer. HF HRV was assessed prior to, during, and following a film-viewing task designed to elicit fear of death.Results: Correlations revealed that fearlessness about death was negatively associated with self-reported fear during the film viewing and positively associated with self-reported and objective pain tolerance. Linear regressions found that fearlessness about death, but not self-reported or objective pain tolerance, was positively associated with HF HRV during the film-viewing and recovery.Discussion: During a fearful, death related event, greater HF HRV was associated with greater fearlessness about death, suggesting that HF HRV may represent one possible mechanism through which fearlessness about death is maintained.
Temporally Specific Roles of Ventral Tegmental Area Projections to the Nucleus Accumbens and Prefrontal Cortex in Attention and Impulse Control
Authors: Flores-Dourojeanni Jacques P. , van Rijt Coby , van den Munkhof Marleen H. , Boekhoudt Linde , Luijendijk Mieneke C. M. , Vanderschuren Louk J. M. J. , Adan Roger A. H. 
Published: April 2021

Deficits in impulse control and attention are prominent in the symptomatology of mental disorders such as attention deficit hyperactivity disorder (ADHD), substance addiction, schizophrenia, and bipolar disorder, yet the underlying mechanisms are incompletely understood. Frontostriatal structures, such as the nucleus accumbens (NAcb), the medial prefrontal cortex (mPFC), and their dopaminergic innervation from the ventral tegmental area (VTA) have been implicated in impulse control and attention. What remains unclear is how the temporal pattern of activity of these VTA projections contributes to these processes. Here, we optogenetically stimulated VTA dopamine (DA) cells, as well as VTA projections to the NAcb core (NAcbC), NAcb shell (NAcbS), and the mPFC in male rats performing the 5-choice serial reaction time task (5-CSRTT). Our data show that stimulation of VTA DA neurons, and VTA projections to the NAcbC and the mPFC immediately before presentation of the stimulus cue, impaired attention but spared impulse control. Importantly, in addition to reducing attention, activation of VTA-NAcbS also increased impulsivity when tested under a longer intertrial interval (ITI), to provoke impulsive behavior. Optogenetic stimulation at the beginning of the ITI only partially replicated these effects. In sum, our data show how attention and impulsivity are modulated by neuronal activity in distinct ascending output pathways from the VTA in a temporally specific manner. These findings increase our understanding of the intricate mechanisms by which mesocorticolimbic circuits contribute to cognition.SIGNIFICANCE STATEMENTDeficits in impulse control and attention are prominent in the symptomatology of several mental disorders, yet the brain mechanisms involved are incompletely understood. Since frontostriatal circuits have been implicated in impulse control and attention, we here examined the role of ascending projections from the midbrain ventral tegmental area (VTA) to the nucleus accumbens (NAcb) and prefrontal cortex (PFC). Using optogenetics to individually stimulate these projections with time-locked precision, we distinguished the role that each of these projections plays, in both impulse control and attention. As such, our study enhances our understanding of the neuronal circuitry that drives impulsive and attentive behavior.