bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of an Innovative Mattress and Cryotherapy on Sleep after an Elite Rugby Match
Authors: ALOULOU ANIS , LEDUC CÉDRIC , DUFOREZ FRANÇOIS , PISCIONE JULIEN , CHERADAME JEREMY , BIEUZEN FRANÇOIS , THOMAS CLAIRE , CHENNAOUI MOUNIR , VAN BEERS PASCAL , NEDELEC MATHIEU 
Published: May 2020

ABSTRACT

Introduction
This study aimed to explore the relationship between elite rugby union match and postmatch sleep architecture and to investigate the effects of a high-heat capacity mattress (MAT) and a whole-body cryotherapy (WBC) session on postmatch sleep architecture.

Methods
Nineteen elite male U23 rugby union players performed in three official matches, followed by three experimental conditions, in a randomized order: MAT, WBC, and no intervention (CONT). Match load was evaluated using GPS trackers and video analyses. Sleep architecture was assessed by polysomnography (PSG). Core body temperature (CBT) and mattress surface temperature were monitored during sleep. Linear mixed-effects models were conducted to assess the effects of each experimental condition on sleep, with match load variables as covariates.

Results
A lower wake after sleep onset (β = −10.5 min, P < 0.01) and higher rapid eye movement sleep proportion (β = +2.8%, P < 0.05) were reported for MAT compared with CONT. Moreover, lower mean CBT (β = −0.135°C, P < 0.001) and mean mattress surface temperature (β = −2.736°C, P < 0.001) during sleep were observed for MAT compared CONT. WBC did not affect nocturnal CBT nor interfere with sleep architecture. For every 100-m increase in high-speed running distance, a higher slow wave sleep (β = +1.1%, P = 0.05) and lower light sleep proportion (β = −1.2%, P < 0.05) proportion were observed. Conversely, for every 10 supplementary collisions, lower slow wave sleep (β = −1.9, P = 0.09) and higher light sleep (β = +2.9%, P < 0.001) proportion were observed.

Conclusion
MAT use had a positive effect on sleep architecture after an elite rugby union match, potentially through a more efficient nocturnal heat transfer.
Glycoalkaloids in commercial potato varieties traded in Nairobi, Kenya
Authors: Musita Consolata Nolega , Okoth Michael Wandayi , Abong' George Ooko , Omayio Duke Gekonge 
Published: May 2020

Background: Glycoalkaloids are naturally occurring toxins in potatoes which, at high levels, pose food safety concerns to consumers. Their concentrations in potatoes are dependent on postharvest handling, variety and stress factors tubers are exposed to. Limited information, however, exists on levels of glycoalkaloids in commercially traded potato tubers in Kenya. The current study sought to determine the glycoalkaloid levels in potatoes traded in Nairobi, Kenya. Methods: Three potato varieties, Shangi, Dutch Robjin and Royal sold in open-air markets and supermarkets were randomly sampled and their glycoalkaloid levels determined by high-performance liquid chromatography. Results: The levels varied significantly (p<0.05). The Shangi variety had the highest glycoalkaloids with a mean of 410.35 mg kg-1 dry weight with samples from supermarkets having the highest levels (550.8 mg kg-1). The same variety from open air markets averaged 382.26 mg kg-1 dry weight compared to the Dutch Robjin (129.2 mg kg-1 dry weight) and Royal variety (98.2 mg kg-1 dry weight) which had the least levels of glycoalkaloids. Conclusions: The levels in sampled tubers did not exceed the recommended levels of 1000 mg/kg on dry weight basis and, therefore, consumption of these potatoes would not raise safety concerns. There is, however, a need to ensure that marketing of tubers is carried out under conditions that minimize occurrence of glycoalkaloids, especially for the Shangi variety, which is the most common in the markets but had relatively high levels of these toxins. There is also a need to educate marketers on the need for proper storage and handling of potatoes during marketing to avoid risk of accumulation of glycoalkaloids.
The Genesis of Voluntary Disclosure: An Analysis of Firms’ First Earnings Guidance
Authors: Allee Kristian D. , Christensen Theodore E. , Graden Bryan S. , Merkley Kenneth J. 
Published: May 2020

We investigate a firm’s decision to initiate earnings guidance during its first year as a public company following its initial public offering (IPO), which we label “early guidance.” Using a sample of firms with IPOs between 2001 and 2010, we find that almost 60% provide early guidance and that only one-third of the firms that do not provide guidance during the first year subsequently decide to guide. Consistent with the importance of liquidity incentives following the IPO, we find that firms are significantly more likely to provide early guidance when their IPOs are backed by venture capital or private equity investors. Our results indicate that firms with higher-quality IPO information are more likely to provide early earnings guidance. We also find that early guidance has significant implications for future disclosure choices. Firms that guide soon after the IPO are significantly more likely to guide again and to provide regular future guidance (i.e., they establish a regular guidance policy). Finally, we find evidence suggesting that the credibility of initial guidance is lower than that of subsequent guidance, and subsequent guidance credibility relates to both the length of firms’ guidance history and the accuracy of their initial guidance disclosures.This paper was accepted by Shiva Rajgopal, accounting.
Decomposing Dynamic Risks into Risk Components
Authors: Schilling Katja , Bauer Daniel , Christiansen Marcus C. , Kling Alexander 
Published: May 2020

The decomposition of dynamic risks a company faces into components associated with various sources of risk, such as financial risks, aggregate economic risks, or industry-specific risk drivers, is of significant relevance in view of risk management and product design, particularly in (life) insurance. Nevertheless, although several decomposition approaches have been proposed, no systematic analysis is available. This paper closes this gap in literature by introducing properties for meaningful risk decompositions and demonstrating that proposed approaches violate at least one of these properties. As an alternative, we propose a novel martingale representation theorem (MRT) decomposition that relies on martingale representation and show that it satisfies all of the properties. We discuss its calculation and present detailed examples illustrating its applicability. This paper was accepted by Baris Ata, stochastic models and simulation.
Increased body mass index percentile is associated with decreased epiphyseal tubercle size in asymptomatic children and adolescents with healthy hips
Authors: Hosseinzadeh Shayan , Kiapour Ata M. , Maranho Daniel A. , Emami Seyed Alireza , Miller Patricia , Kim Young-Jo , Novais Eduardo N. 
Published: May 2020

Purpose To investigate whether body mass index (BMI) percentile impacts the morphology of the capital femoral epiphysis in children and adolescents without hip disorders. Methods We assessed 68 subjects with healthy hips who underwent a pelvic CT for evaluation of appendicitis. There were 32 male patients (47%) and the mean age was 11.6 years (sd 2.3). The BMI (k/m2) was calculated for sex- and age-related percentiles according to the Centers for Disease Control and Prevention growth charts. CT images were segmented, and the epiphysis and metaphysis were reformatted using 3D software. We measured the epiphyseal tubercle (height, width and length), the metaphyseal fossa (depth, width and length) and the peripheral cupping of the epiphysis. All measurements were normalized to the diameter of the epiphysis. Pearson's correlation analysis was used to assess the correlations between the variables measured and BMI percentile adjusted for age. Results Following adjustment to age, increased BMI correlated to decreased tubercle height (r =-0.34; 95% confidence interval (CI) -0.53 to -0.11; p = 0.005), decreased tubercle length (r = -0.32; 95%CI -0.52 to -0.09; p = 0.008) and decreased tubercle width (r = -0.3; 95% CI -0.5 to -0.07; p = 0.01). There was no correlation between BMI and metaphyseal fossa and epiphyseal cupping measurements. Conclusion The association between increased BMI percentile and decreased epiphyseal tubercle size, without changes of the metaphyseal fossa and peripheral cupping suggests another morphological change of the femur that may be associated with decreased growth plate resistance to shear stress. Further study is necessary to investigate whether the epiphyseal tubercle size plays a role in the pathogenesis of slipped capital femoral epiphysis in obese children and adolescents. Level of Evidence Level IV
Flexible transmitters based on directly modulated VCSELs for next-generation 50G passive optical networks
Authors: Parolari Paola , Gatto Alberto , Neumeyr Christian , Boffi Pierpaolo 
Published: May 2020

Discrete multitone (DMT) modulation, due to its water-filling nature, is proposed to enable flexibility in passive optical networks (PONs), optimizing the PON resource usage. The use of DMT signals to directly modulate long-wavelength vertical-cavity surface-emitting lasers (VCSELs) can provide energy-efficient transmitters for 50G PONs. First, we present preliminary experimental measures employing both single-sideband and dual-sideband DMT modulation with already available short-cavity VCSELs operating in the third window to study the PON performance as a function of the accumulated chromatic dispersion and of the received power. The experimental results are then compared with simulations, demonstrating the effectiveness of the developed simulation tool. Then we study the performance of DMT-modulated transmitters based on next-generation short-cavity VCSELs with higher bandwidth (up to 20 GHz) operating in the O-band, evaluating their chromatic dispersion resilience. Finally, considering the statistics of a commercially deployed PON, we demonstrate that DMT modulation, providing link adaptation, offers a significant increase in the total aggregated capacity compared to a single-carrier-based fixed-rate PON, optimizing the PON resource usage with respect to the available power budget and the dispersion impairments.
Tm3+-doped fluorotellurite glass microsphere resonator laser at 2.3  µm
Authors: Wang Pengfei , Yi Yating , Wang Xin , Li Angzhen , Jia Shijie , Fan Yaxian , Brambilla Gilberto , Wang Shunbin , Zhao Haiyan 
Published: May 2020

In this Letter, we report lasing at 2.3 µm in

Tm

3
+

-single-doped and

Tm

3
+

/

Ho

3
+

-codoped fluorotellurite glass microsphere resonators. By employing a 793 nm diode laser as a pump and exploiting whispering gallery mode microresonators (WGMRs), dual-wavelength lasing at 1.9 and 2.3 µm and triple-wavelength lasing at 1.9, 2.07, and 2.3 µm are achieved in

Tm

3
+

-doped and

Tm

3
+

/

Ho

3
+

-codoped microspheres, respectively. The introduction of

Ho

3
+

ions significantly reduces the lasing threshold of

Tm

3
+

at 2.3 µm because of energy transfer.
Investigating Mass Transfer Phenomena in Batch Solvent Extraction of Rice Bran Oil
Authors: Aliwarga Lienda 
Published: May 2020

In this study, we will point out the correlation of critical parameters in designing scale-up of process equipment for commercial rice bran oil extraction with different types of rice paddy, solvent, and physicochemical condition. Advantageously, this research was also intended to enhance the discoveries of novel sustainable production method for resilient agro-based food, energy, and chemical industries. In our experiment, the extraction of rice bran oil was organised in a batch agitated vessel and showed a profile of first order system. The most important factors which profoundly contributed towards the yield of rice bran oil from Saigon I and PadiBesar variety are temperature (T), impeller speed (N), ratio of bran to solvent (s/L), and ratio of impeller’s height-off bottom to tank diameter (h/d). For the mass transfer constant and the rate of extraction as consequence, factors that significantly influenced the correlation were temperature (T), impeller speed (N), ratio of impeller diameter to tank diameter (d/D), and ratio of impeller’s height-off bottom to tank diameter (h/d). For the dimensionless yield, generalised equation is provided with coefficient of determination 0.95, while that of the mass transfer equals to 0.63, reflecting the yield correlation to be more accurate in predicting further experimental results. These correlations are furthermore unique for different rice varieties, of which in this case belongs to Saigon I. Application for other rice species is relevant as by inserting additional correction factor which also exemplified in this research for PadiBesar. Keywords: rice bran oil; batch extraction; storage time; mass transfer, rate, yield
Encapsulation of Soursop (Annona muricata Linn.) Leaf Tea Extract Using Natural Mucilage
Authors: Cornelia Melanie , Natania Kam , Cahyana Herry , Sutiyono Edison 
Published: May 2020

The bioactively rich soursop leaf extract can be encapsulated inside several natural coating materials. The extract of soursop leaf has been found to contain many bioactive compounds such as various phenolic compounds that are beneficial for anticancer, antidiabetic and many other health benefits. However due to the sensitive nature of the bioactive molecules, encapsulation procedure was applied to prolong the activity of the biomolecules. Capsule materials used in this experiment were obtained from natural extract of Okra mucilage, Aloe vera mucilage and Maltodextrin-WPI mixture to protect the unstable bioactive compounds. Homogenation time using ultrasonication and Core to Coating ratio was differed to observe the optimum encapsulation process. The encapsulation efficiency, release factor ability, size distribution and its correlation with bioactive stability are observed using Total Phenolic methods and Antioxidant Activity before and after encapsulation. Aloe vera gave best encapsulation efficiency (88-91%) while microcapsule made with Okra gave the best antioxidant activity (DPPH IC50 633-710ppm), and maltodextrin-WPI gave best powder recovery (yield 70-73%). Keywords: aloe mucilage, antioxidant activity, encapsulation, okra mucilage, soursop tea extract
Activated Carbon Derived From OPEFB by One Step Steam Activation and Its Application for Dye Adsorption : Kinetics and Isothermal Studies
Authors: Sari Fahriya Puspita , Yanto Dede Heri Yuli , Pari Gustan 
Published: May 2020

Activated carbon was prepared from OPEFB by one step steam activation method. The adsorption performance for the removal of acid orange 52 (AO 52), reactive blue 19 (RB 19), basic violet 1 (BV 1) was investigated. Each dye has a different chemical structure such as azoic, anthraquinone, triarylmethane for AO 52, RB 19, and BV 1 respectively. The effects of adsorbent dosage, pH, and contact time on the adsorption process were studied. Experimental data were analyzed by model equations such as Langmuir, Freundlich and Temkin isotherms and it was found that the Langmuir isotherm model best fitted for all three dyes with R2 values is higher than 0.95. Langmuir model assumes a homogeneous nature and monolayer coverage of dye molecules at the outer surface of activated carbon. Adsorption kinetics was determined using pseudo-first-order, pseudo-second-order rate equations, Elovich model and also intraparticle diffusion models. Kinetic studies showed that the pseudo-second-order kinetic model better described the adsorption process with R2 values exceeds 0,99 compared with the other kinetics model. The SEM images showed AC pores was well developed with steam activation while wider porosity is created in the macropore range. FT-IR analysis had shown that the AC functional groups were disappeared because of vaporization the volatile materials when the heating process. Keywords: Activated Carbon, Adsorption Isotherms, Kinetic, OPEFB, Steam Activation
The performance of a pilot-scale anaerobic hybrid bioreactor on palm oil mill effluent treatment
Authors: Ahmad Adrianto , Bahruddin Bahruddin , Andrio David , Hamzah Amir 
Published: May 2020

Contemporarily, Indonesia and Malaysia are the largest contributors of crude palm oil (CPO) in the world by up to 40%, and 37.3%, respectively. Furthermore, its production value this year reached 19.7 million tons, where each generates 2.5 m3 of wastewater. Meanwhile, of all the provinces in Indonesia specifically, Riau is the largest supplier for exports by up to 38%, generated from 225 palm oil mills, where a total of 6.3 million tons resulting in the generation of about 15.75 million m3 of wastewater, with organic content between the range of 30,000-60,000 mg COD/l. In addition, one of the uses of this wastewater includes anaerobic processes, with the double benefit of reducing COD concentrations, subsequently applying it as fertilizer, and also in the production of methane gas, as an alternative source of energy. The purpose of this study, therefore, is to observe the effect of bioreactor volume, scale-up on the performance of anaerobic hybrid bioreactors, in the treatment of mill effluents. The technology examined in this study was the anaerobic hybrid bioreactor with the dimensions of length 22 m, width 10 m, and depth 1.5 m, and a total volume of 330 m3, which is impermeable to oxygen, and a 250 m3 effective working volume. This was built and operated at a hydraulic retention time of 1 day, in the Palm Oil Mill of Riau, and the results showed the environmental conditions to range from a pH of 7.2 to 8.0, with temperatures from 320C to 350C, acetic acid of 774 mg/l to 1,180 mg/l, and alkalinity of 2,149 mg/l up to 2,400 mg/l. Furthermore, the performance of these reactors are shown by the highest COD removal efficiency of 77.8%, and a biogas test for the propensity of being applied as an alternative energy source obtained a methane gas concentration of 54%. Keywords: anaerobic, bioreactor, biogas, wastewater, performance, palm oil mill effluent
Biofilm Based on Modified Sago Starch: Preparation and Characterization
Authors: Sondari Dewi , Falah Faizatul , Suryaningrum Riska , Sari Fahriya Puspita , Sari Fahriya Puspita , Septefani Athanasia Amanda , Septefani Athanasia Amanda , Restu Witta Kartika , Restu Witta Kartika , Sampora Yulianti , Sampora Yulianti 
Published: May 2020

Biofilms made from modified sago starch to improve the mechanical and physical properties have been studied. This study aimed to prepare and characterize biofilms from sago starch and modified sago (acetylation, oxidation, cross-link and precipitation). Modified of sago starch was prepared by some methods: precipitation using ethanol as solvent, acetylation modified of sago starch using acetic anhydride, oxidation modification using hydrogen peroxide and cross-link modification using sodium acetate. Biofilms were made from modified sago using glycerol with a concentration of 1.0% weight, where glycerol acts as a plasticizer to impart the thermoplasticity of the starch film. Biofilm made from native sago was then compared to biofilm from modified sago starch. The effects of modified sago starch to the biofilm were measured on its moisture contents, contact angle value, mechanical properties such as elongation and tensile strength. The chemical structures were evaluated by Fourier-transform infrared spectroscopy (FTIR) and morphology of biofilm were measured by Scanning Electron Microscope (SEM). The optimum condition of modified sago starch used in biofilm in this study is by acetylation. The result show that modified acetylation of sago starch can improve the properties of biofilm Keywords: biofilms, sago, acetylation, oxidation, cross link, SEM, FTIR
Morphological transition of amphiphilic block copolymer/PEGylated phospholipid complexes induced by the dynamic subtle balance interactions in the self-assembled aggregates
Authors: Tao Susu , Chu Yanyan , Wang Zihao , Xu Xiaoyan , Tan Qinggang 
Published: May 2020

Abstract
Recently, there has been an increasing interest in the control of morphological transition of block copolymer aggregates. Here, we report how to control the morphological transition of methoxy polyethylene glycol–poly(d,l-lactic acid) (PDLLA–MPEG) by adding 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)] (DSPE–PEG). In the aggregates formed by dialyzing DSPE–PEG/PDLLA–MPEG mixed solutions against water, the two hydrophobic fatty acid tails of DSPE–PEG will preferentially anchor to the hydrophobic segment end of PDLLA–MPEG by interdigitating between these two tails and PDLLA segments. Consequently, DSPE–PEG and PDLLA–MPEG will form “ABA” temporary supra-amphiphiles in which A represents a poly(ethylene glycol) (PEG) chain segment and B is a mixed hydrophobic segment composed of PDLLA and DSPE segments; the repulsive force derived from the PEG segments of DSPE–PEG can affect the stability of “ABA” temporary supra-amphiphiles. Our results show that the dynamic subtle balance between the number of “ABA” temporary supra-amphiphiles formed and the strength of repulsive force between the PEG segments of DSPE–PEG drives the morphological structure of DSPE–PEG/PDLLA–MPEG aggregates to change from micelles to vesicles, then to semi-vesicles and finally to mixed micelles, with increasing DSPE–PEG additions.
Scholarly committees as elite public action: The SSRC and the origins of sociolinguistics
Authors: Heller Monica 
Published: May 2020

Abstract
Starting in the early 1950s, the SSRC cultivated interdisciplinary research into the role of language in culture and thought through its Committees on Psycholinguistics and Sociolinguistics. Here, Monica Heller examines how the latter committee (1963–1979) helped establish sociolinguistics in the United States, investigating the tensions between language, culture, and inequality. In exploring how the committee shifted focus from the developing world to marginalized groups in the United States, Heller addresses how the research agendas of these scholarly structures are influenced by the political dynamics or ideologies of their time, in this case the Cold War and decolonization.
Directions in Sociolinguistics: Report on an Interdisciplinary Seminar
Authors: Ferguson Charles A. 
Published: May 2020

Abstract
A 1964 summer seminar hosted by the SSRC’s Committee on Sociolinguistics highlighted tensions between sociology and linguistics when scholars gathered to address how their disciplines can deepen research on language’s impact on society. For example, sociologists questioned linguistics’ lack of definition for language or dialect while linguists raised concerns about sociology’s reliance on large quantified data. However, by the end of the seminar, the scholars agreed the encounter had raised important questions and opened new paths of investigation through both sociological and linguistic approaches, including the study of language and social stratification, multilingualism, and language standardization.
Multilingualism: An insufficient answer to sociolinguistic inequalities
Authors: Duchêne Alexandre 
Published: May 2020

Abstract
Tracing the ways in which multilingualism has been understood and valued by scholars and beyond, Alexandre Duchêne shows how the work of sociolinguistics dramatically shifted the image of multilingual speakers and societies as a problem for nation-states to something to be celebrated, even as an indicator and contributor to social justice for minority language speakers. He then goes on to argue that this validation and recognition of multiple languages can divert attention away from broader inequalities, especially socioeconomic ones, that multilingualism is unable to address.