bluuebunny/crossref_metadata_2025_split huggingface dataset:
Type of early bilingualism effect on the delateralization of /ʎ/ in Basque and Spanish
Authors: Beristain Ander 
Published: March 2020

Abstract
The contrast between /ʎ/ and /ʝ/ has been lost in most Spanish varieties. This merger (yeísmo) has also been claimed to have spread to Basque. I study the palatal merger in Azpeitia Basque and Spanish, where simultaneous (2L1 Basque, Spanish) and early-sequential (L1 Basque, L2 Spanish) groups were tested in both languages. Comparing the two bilingual groups, this study found that, as a group, early-sequential bilinguals do not merge the phonemes in either of the two languages. However, while simultaneous bilinguals maintain the distinction in Basque, they tend to merge the phonemes in Spanish. Inter-speaker variation is found within each group and individual reports do not confirm global results. This study has also encountered different types of speakers as far as the palatal merger is concerned in Basque and Spanish: (1) non-mergers in any of the languages, (2) mergers in both languages, (3) mergers only in Spanish, and (4) mergers only in Basque.
N-terminal [Glu]3 moiety of γ-glutamyl peptides contributes largely to the activation of human calcium-sensing receptor, a kokumi receptor
Authors: Yamamoto Mizuki , Terada Yuko , Motoyama Takayasu , Shibata Munehisa , Saito Tsutomu , Ito Keisuke 
Published: March 2020

Abstract
γ-glutamyl peptides have been suggested to impart kokumi properties to foods by activating human calcium-sensing receptor (hCaSR). In this study, the relationship between γ-glutamyl peptide structure and hCaSR activity was systematically analyzed using γ-[Glu](n=0-4)-α-[Glu](n=0-3)-Tyr. Our results suggest that N-terminal [Glu]3 moiety is very important for hCaSR activities of γ-glutamyl peptides.
Plant growth regulators and Axl and immune checkpoint inhibitors from the edible mushroom Leucopaxillus giganteus
Authors: Malya Irine Yunhafita , Wu Jing , Harada Etsuko , Toda Masaaki , D’Alessandro-Gabazza Corina N , Yasuma Taro , Gabazza Esteban C , Choi Jae-Hoon , Hirai Hirofumi , Kawagishi Hirokazu 
Published: March 2020

Abstract
A novel compound, (R)-4-ethoxy-2-hydroxy-4-oxobutanoic acid (1), and six known compounds (2–7) were isolated from the fruiting bodies of the wild edible mushroom Leucopaxillus giganteus. The planar structure of 1 was determined by the interpretation of spectroscopic data analysis. The absolute configuration of 1 was determined by comparing specific rotation of the synthetic compounds. In the plant regulatory assay, the isolated compounds (1–7) and the chemically prepared compounds (8–10) were evaluated their biological activity against the lettuce (Lactuca sativa) growth. Compounds 1 and 3–10 showed the significant regulatory activity of lettuce growth. 1 showed the strongest inhibition activity among the all the compounds tested. In the lung cancer assay, all the compounds were assessed the mRNA expression of Axl and immune checkpoints (PD-L1, PD-L2) in the human A549 alveolar epithelial cell line by RT-PCR. Compounds 1–10 showed significant inhibition activity against Axl and/or immune checkpoint.
Bilateral comparison report of DC resistance (1 mΩ, 100 Ω and 100 MΩ) between LNE (France) and KIM-LIPI (Indonesia)
Authors: Blanc Isabelle 
Published: March 2020

This report describes a bilateral comparison of resistance standards organised within the frame of the EU-Indonesia Trade Support Program II (TSP2) / AWP2-2-20-5 between LNE, France and KIM-LIPI, Indonesia. This bilateral comparison registered in the KCDB as EURAMET.EM-S40 was piloted by LNE. LNE participated in CCEM Key Comparison CCEM-K10 and CCEM-K2, thus providing the link between KIM-LIPI results and CCEM-K10 and CCEM-K2. This report includes the measurement results from the participants and information about their calibration methods for measurements of 1 mΩ, 100 Ω and 100 MΩ resistors.

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
COOMET.T-S3: supplementary comparison on relative humidity (RH) from 30 % rh to 90 % rh at 23 °C
Authors: Carroll Paul , Chelidze Iury 
Published: March 2020

This report describes the results of supplementary comparison COOMET.T-S3 (also known as supplementary comparison COOMET 768/GE/18) on relative humidity (RH) from 30 % rh to 90 % rh at 23 °C. The comparison was organised between the National Physical Laboratory (NPL) United Kingdom (Laboratory-coordinator) and Georgian National Agency for Standards and Metrology (GEOSTM), Georgia. The comparison started in July 2018 and finished in September 2019
The majority of the bilateral degree of equivalence values, DGEOSTM/NPL
, for the two participants are low compared to the uncertainty in the DoE, UGEOSTM/NPL
. With this comparison, the participant GEOSTM has demonstrated their technical competence for realization of relative humidity in the range 30 %rh to 90 %rh at 23 °C

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCT, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Final report, on-going key comparison BIPM.QM-K1, ozone at ambient level, comparison with UBA, October 2019
Authors: Viallon Joële , Idrees Faraz , Moussay Philippe , Wielgosz Robert , Stummer Volker 
Published: March 2020

As part of the ongoing key comparison BIPM.QM-K1, a comparison has been performed between the ozone standard of Germany maintained by the Umweltbundesamt (UBA) and the common reference standard of the key comparison, maintained by the Bureau International des Poids et Mesures (BIPM). The instruments have been compared over a nominal ozone amount-of-substance fraction range from 0 nmol/mol to 500 nmol/mol.

Main text

To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.
The final report has been peer-reviewed and approved for publication by the CCQM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).
Enhancement of gravitational waves induced by scalar perturbations due to a sudden transition from an early matter era to the radiation era
Authors: Inomata Keisuke , Kohri Kazunori , Nakama Tomohiro , Terada Takahiro 
Published: March 2020

Abstract
Stochastic gravitational wave background is produced from the primordial curvature perturbations at the second order of perturbations. We revisit such induced gravitational waves produced around a sudden reheating transition from an early matterdominated era to the radiation-dominated era. We find significant enhancement of the induced gravitational waves because of fast oscillations of scalar modes already inside the horizon just after the transition with unsuppressed amplitude. The enhancement is so significant that the future gravitational wave observations can detect the gravitational waves if the reheating temperature is in the range T
R ≲ 7 × 10−2GeV or 20 GeV ≲ T
R ≲ 2 × 107 GeV. Thus, the induced gravitational waves can be a useful probe of the reheating dynamics of the universe. This talk is based on Ref. [1].
Softening of gravitational effect on noncommutative spacetime
Authors: Nagasawa Michiyasu , Matsuyama Ryouta 
Published: March 2020

Abstract
A noncommutative gravitational theory constructed by applying Moyal deformation quantization and the Seiberg–Witten map to teleparallel gravity shows that gravity acts repulsively in an extreme region where its quantum effects become prominent. The problems involved with the order of products and the relationship between the metric and the Moyal product can be solved by assigning their roles, such that the former is responsible for the rule of the inner product and the latter is in charge of tensor and field noncommutativity. As a result, it is found that the cosmic evolution of the very early stage of the universe was modified as if the noncommutative effect works similarly to a cosmological constant. Furthermore it was clarified that the degree of gravitational redshift of a spherically symmetric space with central mass becomes smaller, which means the attractive force is effectively weakened. Such consequences indicate that in the noncommutative spacetime, the gravitational interaction is softened compared to the classical gravity.
ANAIS-112 status: two years results on annual modulation
Authors: Amaré J. , Cebrián S. , Cintas D. , Coarasa I. , García E. , Martínez M. , Oliván M.A. , Ortigoza Y. , Ortiz de Solórzano A. , Puimedón J. , Salinas A. , Sarsa M.L. , Villar P. 
Published: March 2020

Abstract
ANAIS (Annual modulation with Nal Scintillators) is a dark matter direct detection experiment located at the Canfranc Underground Laboratory (LSC), in Spain. The goal is to confirm or refute in a model independent way the DAMA/LIBRA positive result: an annual modulation in the low-energy detection rate compatible with the expected signal induced by dark matter particles in the galactic halo. This signal, observed for about 20 years, is in strong tension with the negative results of other very sensitive experiments, but a direct comparison using the same target material, NaI(Tl), was still lacking. ANAIS-112, consisting of 112.5 kg of NaI(Tl) scintillators, is taking data at the LSC since August 2017. Here we present the preliminary annual modulation analysis corresponding to two years of data (exposure of 220.69 kg×y) and the ANAIS-112 projected sensitivity for the scheduled 5 y of operation.
Annual and diurnal modulations of the angular distribution of the 3-D WIMP velocity observed at an underground laboratory
Authors: Shan Chung-Lin 
Published: March 2020

Abstract
In this article, I present our (Monte Carlo) simulation results of the angular distribution of the 3-dimensional WIMP velocity, in particular, a possible “annual” modulation and the diurnal modulation proposed in literature, for different underground laboratories.
Dark matter local density determination based on recent observations
Authors: de Salas Pablo F. 
Published: March 2020

Abstract
The local density of dark matter is an important quantity. On the one hand, its value is needed for dark matter direct detection searches. On the other hand, a precise and robust determination of the local dark matter density would help us learn about the shape of the dark matter halo of our Galaxy, which plays an important role in dark matter indirect detection searches, as well as in many studies in astrophysics and cosmology. There are different methods available to determine the local dark matter density. Among them, it is common to study either the vertical kinematics of a selected group of tracers or the rotation curve of the Milky Way. Recent estimates of the local dark matter density have used the precise observations conducted by the ESA/Gaia mission. However, in spite of the quality of the data released by Gaia’s observations, different analyses of the local dark matter density produce dissimilar results. After a brief review of the most common methods to estimate the local density of dark matter, here we argue about different explanations for the discrepancies in the results of recent analyses. We finish by presenting new approaches that have been proposed in the literature and could help us improve our knowledge of this important quantity.
Scotogenic dark matter and single-zero textures of the neutrino mass matrix
Authors: Kitabayashi Teruyuki 
Published: March 2020

Abstract
We consider the phenomenology of the scotogenic model with the one-zero-textures of the neutrino flavor mass matrix. One of the six patterns of the neutrino mass matrix is favorable for the real Yukawa matrix. On the other hand, for the complex Yukawa matrix, five of the six patterns are compatible with observations of the neutrino oscillations, dark matter relic abundance and branching ratio of the μ → eγ process.
DANCE: Dark matter Axion search with riNg Cavity Experiment
Authors: Michimura Yuta , Oshima Yuka , Watanabe Taihei , Kawasaki Takuya , Takeda Hiroki , Ando Masaki , Nagano Koji , Obata Ippei , Fujita Tomohiro 
Published: March 2020

Abstract
We have proposed a new approach to search for axion dark matter with an optical ring cavity [Phys. Rev. Lett. 121, 161301 (2018)]. The coupling of photons to axions or axion-like particles makes a modulated difference in the phase velocity between left- and righthanded photons. Our method is to measure this phase velocity difference with a ring cavity, by measuring the resonant frequency difference between two circular polarizations. Our estimation shows that the sensitivity to axion-photon coupling constant g

aγ for axion mass m ≲ 10−10 eV can be improved by several orders of magnitude compared with the current best limits. In this paper, we present the principles of the Dark matter Axion search with riNg Cavity Experiment (DANCE) and the status of the prototype experiment, DANCE Act-1.
Increasing light collection efficiency of liquid argon detector for low mass WIMP search
Authors: Aoyama Kazutaka 
Published: March 2020

Abstract
Liquid argon (LAr) is known as an excellent target material for weakly interacting massive particle (WIMP) dark matter direct-detection search experiment. In WIMP searches, distinguishing signal events from electronic recoil (ER) backgrounds is essential. The reduction of ER power using pulse shape discrimination (PSD) improves as light collection efficiency increases. However photosensors, which have to be operational in a cryogenic environment, have no high quantum efficiency (QE) at the 128 nm VUV scintillation light of argon. Therefore, a wavelength shifter, i.e. tetraphenyl butadiene (TPB), is evaporated on the inner surface of the detector to convert VUV to visible light that can be detected by photosensors.
Thus, we constructed a well-controlled TPB evaporation system to ensure reproducibility and measured the amount of TPB on the surface using a quartz crystal microbalance. We obtained the world’s highest light yield (˜11.5 PE/keVee) by optimizing the amount of evaporated TPB. We describe our efforts to improve light collection efficiency.
LBECA: A Low Background Electron Counting Apparatus for Sub-GeV Dark Matter Detection
Authors: Bernstein A. , Clark M. , Essig R. , Fernandez-Serra M. , Kopec A. , Lang R.F. , Long J. , Ni K. , Pereverzev S. , Qi J. , Sorensen P. , Xu J. , Ye J. , Zhen C. 
Published: March 2020

Abstract
Two-phase noble liquid detectors, with large target masses and effective background reduction, are currently leading the dark matter direct detection for WIMP masses above a few GeV. Due to their sensitivity to single ionized electron signals, these detectors were shown to also have strong constraints for sub-GeV dark matter via their scattering on electrons. In fact, the most stringent direct detection constraints for sub-GeV dark matter down to as low as 5 MeV come from noble liquid detectors, namely XENON10, DarkSide-50, XENON100 and XENON1T, although these experiments still suffer from high background at single or a few electron level. LBECA is a planned 100-kg scale liquid xenon detector with significant reduction of the single and a few electron background. The experiment will improve the sensitivity to sub-GeV dark matter by three orders of magnitude compared to the current best constraints.
Search for sub-GeV dark matter by annual modulation using XMASS-I detector
Authors: Yang Byeongsu 
Published: March 2020

Abstract
A search for dark matter (DM) with mass in the sub-GeV region (0.32–1 GeV) was conducted by looking for an annual modulation signal in XMASS, a single-phase liquid xenon detector. Inelastic nuclear scattering accompanied by bremsstrahlung emission was used to search down to an electron equivalent energy of 1 keV. The data used had a live time of 2.8 years (3.5 years in calendar time), resulting in a total exposure of 2.38 ton-years. No significant modulation signal was observed and 90% confidence level upper limits of 1.6 × 10−33 cm2 at 0.5 GeV was set for the DM-nucleon cross section. This is the first experimental result of a search for DM mediated by the bremsstrahlung effect.
Directional Dark Matter Searches with the CYGNO Project
Authors: Baracchini E , Bedogni R , Bellini F , Benussi L , Bianco S , Capoccia C , Caponero M , Cavoto G , Costa I A , Di Marco E , D’Imperio G , Iacoangeli F , Maccarone G , Marafini M , Mazzitelli G , Messina A , Orlandi A , Paoletti E , Passamonti L , Pelosi A , Petrucci F , Piccolo D , Pierluigi D , Pinci D , Renga F , Russo A , Saviano G , Tomassini S 
Published: March 2020

Abstract
The goal of the CYGNO project is to deploy at Laboratori Nazionali del Gran Sasso (LNGS) an high resolution Time Projection Chamber (TPC) with Gas Electron Multipliers (GEMs) amplification and optical 3D readout of an Helium/Fluorine based gas mixture for directional Dark Matter (DM) searches at low 1-10 GeV WIMP masses. The determination of the incoming direction of WIMP particles can in fact offer not only additional handles for discrimination of the annoying backgrounds, but especially an unique key for a positive, unambiguous identification of a DM signal.
Results of a directional dark matter search from the NEWAGE experiment
Authors: Ikeda T. , Miuchi K. , Hashimoto T. , Ishiura H. , Nakamura T. , Shimada T. , Nakamura K. 
Published: March 2020

Abstract
In this study we present the results of a directional dark matter search from the NEWAGE experiment. A low-background gaseous detector, namely a low alpha-ray emitting μ-PIC (LA
μ
-PIC), was developed. The LA
μ
-PIC was installed in Kamioka Observatory and the NEWAGE-0.3” detector with a detection volume of 37 L was operated from June to November 2018. A total exposure of 1.1 kg·days was obtained and a reduction of background by 30 times comparing with a previous result was confirmed. The remaining backgrounds were studied using a Monte Carlo simulation. The main background in the energy region of 50 ≤ E ≤ 100 keV was found to be alpha-rays emitted from the surface of the LA
μ
-PIC.
CYGNUS
Authors: Miuchi Kentaro , Baracchini Elisabetta , Lane Gregory , Spooner Neil J. C. , Vahsen S. E. 
Published: March 2020

Abstract
Directional information in the direct dark matter searches is believed to be able providing a clear discovery of the galactic WIMP dark matter, together with a further potential to investigate the properties of the dark matter. CYGNUS is a concept to detect the galactic WIMP dark matter particles with directionality. In this paper, physics motivation and technological R&D status will be reviewed.
Observing the dark sector with supernovae
Authors: DeRocco William 
Published: March 2020

Abstract
It has been long known that the excessive cooling of supernovae places strong limits on models of light dark sectors. However, even at couplings where the flux of new particles produced in a supernova is too low to violate the cooling bound, the flux remains large and can be observed through a variety of signatures, both direct and indirect. We analyze two different models with radically different behavior. The first model is that of a dark photon on the MeV scale. This model can be probed via the observation of electromagnetic signals produced in dark photon decay. The second model is that of a dark U(1) sector with heavy mediator and MeV-scale dark fermions. In this case, the flux emerging from supernovae is much hotter than the galactic dark matter, allowing it to be detected in existing direct detection experiments designed to hunt for GeV-scale dark matter. In both cases, we find that these signatures allow new bounds to be placed well outside existing cooling limits. Furthermore, these new signals may allow for a future discovery of the dark matter.
Modeling evolution of dark matter substructure and annihilation boost
Authors: Hiroshima Nagisa , Ando Shin’ichiro , Ishiyama Tomoaki 
Published: March 2020

Abstract
The structure of dark matter halo is hierarchical. Among them, small-scale structures in dark matter halo (so-called subhalos) can enhance dark matter annihilation signals. It is necessary to quantify boost factors by those subhalos to derive the property of dark matter with current/future gamma-ray observations. In order to derive the subhalo boost factors, calculations of halo structure covering more than 20 orders-of-magnitude in the halo mass up to a redshift of z ˜ 10 are required. This is beyond the capability of the current state-of-art cosmological N-body simulation which is a widely-adopted method to study the halo structure. In this talk, I introduce our analytical approach for the formalism of subhalo evolutions and the resultant boost factors. I show that the constraints on the annihilation cross-section obtained by isotropic γ-ray observations can be updated by several factors by taking the contribution from subhalos into account.
Studies on liquid argon S1 and S2 properties for low mass WIMP search experiments
Authors: Tanaka Masashi , Aoyama Kazutaka , Kimura Masato , Takeda Tomomasa , Yorita Kohei 
Published: March 2020

Abstract
Liquid argon is known as an excellent target material for WIMP dark matter direct search experiment. Relatively small atomic mass (A=40) gives high nuclear recoil energy for WIMP-Ar nuclear scattering, thus it potentially has high sensitivity for low mass WIMP (<10 GeV/c2) . There are two crucial R&D topics for the liquid argon detector to explore such low mass WIMP signal, namely, deep understanding the liquid argon scintillation and ionization process for low energy deposition (<10 keV), and increasing the signal light yield by improving the argon scintillation light collection efficiency. In this paper, we report recent results from Waseda university liquid argon test facility.
Purification of the NaI(Tl) crystal for dark matter search project PICOLON
Authors: Kanemitsu Y. , Chernyak D. , Ejiri H. , Fushimi K. , Hata K. , Hazama R. , Ikeda H. , Imagawa K. , Inoue K. , Kozlov A. , Orito R. , Shima T. , Takemoto Y. , Umehara S. , Yasuda K. , Yoshida S. 
Published: March 2020

Abstract
Direct search for dark matter is one of the most important problems in astrophysics. Significant signal for dark matter will be a hint to clarify the origin of the universe. Only DAMA/LIBRA experiment with NaI(Tl) detector has ever suggested the presence of dark matter signal. Verifying the DAMA/LIBRA result by a NaI(Tl) detector is urgent and important task. We have tried to purify NaI(Tl) crystal to search for dark matter. In this presentation, the present status of purification will be discussed. The concentration of potassium is successfully reduced to desired sensitivity. The 210Pb, which is difficult to reduce, has been reduced effectively. Present status of low background measurement in Kamioka observatory will be shown.
Measurement of the scintillation efficiency for low energy nuclear- and electronic-recoils in liquid argon detector for WIMP search
Authors: Kimura Masato 
Published: March 2020

Abstract
A liquid argon (LAr) scintillation detector is known to offer several attractive features to search for WIMP dark matter. A key quantity in this search is the conversion efficiencies of nuclear- and electronic-recoils (NR and ER) energy deposition into the scintillation signal. Two measurements are performed to study these properties: (1) scintillation efficiency for a few tens of keV NR under electric fields up to 3 kV/cm; (2) efficiency for ER ranging from a few keV to 1 MeV at null field. We present the results of these measurements and discuss the LAr response based on traditional models.