bluuebunny/crossref_metadata_2025_split huggingface dataset:
Testing Mate Choice Hypotheses in a Transitional Small Scale Population
Authors: Boothroyd Lynda G. , Jucker Jean-Luc , Thornborrow Tracey , Tovee Martin J. , Batres Carlota , Penton-Voak Ian 
Published: September 2021

Abstract
Objective
Tests of theories of mate choice often rely on data gathered in White, industrialised samples and this is especially the case for studies of facial attraction. Our understanding of preferences for sexual dimorphism is currently in flux and a number of hypotheses require testing in more diverse participant samples. The current study uses opportunistically gathered facial dimorphism preference data from 271 participants in rural Nicaragua, and 40 from the national capital Managua. We assess pre-registered hypotheses drawn from sexual selection theory, and from more recent approaches which consider the impacts of economic development and cultural ‘modernisation’ on mate preferences.

Methods
Participants verbally reported demographic data, and indicated preferences for five male and five female pairs of faces manipulated to differ in sexually dimorphic facial structure based on a sample of Salvadoran individuals.

Results
While urban participants showed a preference for more feminine female faces, this preference was not evident in the rural participants. Neither urban nor rural participants showed any directional preference for masculinised/feminised male faces. Furthermore, there was no support for any other pre-registered hypothesis.

Conclusions
Our results are consistent with previous studies showing no interest in facial dimorphism in less globally-acculturated, or market integrated, populations. Together, this suggests that while facial dimorphism may be subject to systematically varying preferences amongst some low-fertility, industrialised populations, it is not a feature which is likely to have been important in ancestral populations. We call for further work attempting to replicate well known mate choice phenomena in more diverse samples.
“China as a Method” for Chinese Political Science Research
Authors: Yang Guangbin 
Published: September 2021

AbstractSince the reinstatement of political science as an academic discipline in 1980, the Chinese political science scholarship has as much studied China-related issues as adopted from the West a large number of scholarly findings, research methodology, and theories including the modernization theory in the 1980s, the democratic transition theory from the 1990s onwards, and the governance theory in the twenty-first century. Through the academic dialogue between China and the West, the political science research community in China has, by the same token, formulated its own theories on democracy and governance that are derived from China’s experiences. Furthermore, along with the unprecedented transformations throughout the whole society, Chinese political science has equally undergone major changes, of which a case in point can be the calling in this article for a political science research using "China as a method" (For this notion of "China as a Method", although it comes from Yuzo Mizoguchi, a Japanese scholar on China studies, it is also a product of the mutual learning across civilizations and also benefits from the inspiration of "taking the reform as the methodology". The so-called "China as the methodology" not only focuses on "China as the center", basing one’s research on China, answering questions about China, and putting forward China-based propositions; it also means that the ontology, epistemology, and methodological knowledge generated by “China as the center” or “China as a method” can become a theoretical orientation and methodological framework for Chinese political research in the world.). The best way to understand China is to study its political history, as Chinese history is mainly a political one, demonstrating a high degree of historical continuity. For this very reason, we have proposed a historical political science as a method for studying China—an approach that is different from historical sociology. The historical political science is, indeed, not Chinese-centered or -focused, where a comparative historical analysis will be ushered in as well.
The Political Development of Contemporary China from the Perspective of Historical Political Science
Authors: Yang Guangbin 
Published: September 2021

AbstractThe political development of contemporary China defies existing political theories. The framework of “political science” based on the ‘rational man hypothesis’ has proven to be fallible in terms of correctly envisioning China’s future. Appertaining to the Chinese political history, historical political science offers not only epistemology and methodology of the subject, but also an ontological element, for observation. With respect to historical political science, contemporary Chinese politics is considered to be the natural genetic extension of the Chinese civilization as well as a continuous and unified development process spanning over a period of 70 years ever since the People’s Republic of China was founded. Historical political science, deemed to be a tailored research approach for the development of contemporary Chinese politics, essentially adds further value and significance to this discipline.
Convergent Usage of Amino Acids in Human Cancers as a Reversed Process of Tissue Development
Authors: Luo Yikai , Liang Han 
Published: September 2021

Abstract
Genome- and transcriptome-wide amino acid usage preference across different species is a well-studied phenomenon in molecular evolution, but its characteristics and implication in cancer evolution and therapy remain largely unexplored. Here, we analyzed large-scale transcriptome/proteome profiles, such as The Cancer Genome Atlas (TCGA), the Genotype-Tissue Expression (GTEx), and the Clinical Proteomic Tumor Analysis Consortium (CPTAC), and found that compared to normal tissues, different cancer types showed a convergent pattern toward using biosynthetically low-cost amino acids. Such a pattern can be accurately captured by a single index based on the average biosynthetic energy cost of amino acids, termed energy cost per amino acid (ECPA). With this index, we further compared the trends of amino acid usage and the contributing genes in cancer and tissue development, and revealed their reversed patterns. Finally, focusing on the liver, a tissue with a dramatic increase in ECPA during development, we found that ECPA represents a powerful biomarker that could distinguish liver tumors from normal liver samples consistently across 11 independent patient cohorts and outperforms any index based on single genes. Our study reveals an important principle underlying cancer evolution and suggests the global amino acid usage as a system-level biomarker for cancer diagnosis.
Detecting Seismo‐Ionospheric Anomalies Possibly Associated With the 2019 Ridgecrest (California) Earthquakes by GNSS, CSES, and Swarm Observations
Authors: Xie Ting , Chen Biyan , Wu Lixin , Dai Wujiao , Kuang Cuilin , Miao Zelang 
Published: September 2021

AbstractThe association between earthquakes and ionospheric precursors has been widely reported in previous studies. The Swarm satellite constellation, the China Seismo‐Electromagnetic Satellite (CSES), and the ground‐based global navigation satellite system (GNSS) observations provide us new opportunities to detect ionospheric precursors to earthquakes for a better understanding of the seismic‐ionospheric coupling. In California, two shallow earthquakes with magnitudes of 6.5 and 7.1, the two higher magnitude events of the Ridgecrest earthquakes sequence, occurred on July 4 and July 6, 2019, respectively. This study adopted total electron content (TEC) data from the GNSS, and electron density (Ne), and electron temperature (Te) data from the CSES and Swarm to study the possible ionospheric perturbations before the Ridgecrest earthquakes. A sliding interquartile range method was used to analyze the TEC data, and a spatial differential method and a revisit trajectory comparison were used to analyze the Ne and Te data. While excluding the influences of various factors including solar and geomagnetic activities, planetary waves, tropospheric convection, and medium‐scale traveling ionospheric disturbances, the cross‐validation of the multi‐source data found that anomalies detected on June 20, June 22, and June 26–29, 2019 could be regarded as precursors of the Ridgecrest earthquakes. A spatial distribution analysis showed that the pre‐earthquake anomalies offset the equatorial direction. TEC anomalies were all positively correlated with the Ne anomalies, with most of them were positive. The Ne and Te anomalies were both positively and negatively correlated with mostly negative, while showing a strong linear negative correlation at nighttime.
Multi‐Sensor Approach for High Space and Time Resolution Land Surface Temperature
Authors: Desai Ankur R. , Khan Anam M. , Zheng Ting , Paleri Sreenath , Butterworth Brian , Lee Temple R. , Fisher Joshua B. , Hulley Glynn , Kleynhans Tania , Gerace Aaron , Townsend Philip A. , Stoy Paul , Metzger Stefan 
Published: September 2021

AbstractSurface‐atmosphere fluxes and their drivers vary across space and time. A growing area of interest is in downscaling, localizing, and/or resolving sub‐grid scale energy, water, and carbon fluxes and drivers. Existing downscaling methods require inputs of land surface properties at relatively high spatial (e.g., sub‐kilometer) and temporal (e.g., hourly) resolutions, but many observed land surface drivers are not continuously available at these resolutions. We evaluate an approach to overcome this challenge for land surface temperature (LST), a World Meteorological Organization Essential Climate Variable and a key driver for surface heat fluxes. The Chequamegon Heterogenous Ecosystem Energy‐balance Study Enabled by a High‐density Extensive Array of Detectors (CHEESEHEAD19) field experiment provided a scalable testbed. We downscaled LST from satellites (GOES‐16 and ECOsystem Spaceborne Thermal Radiometer Experiment on Space Station [ECOSTRESS]) with further refinement using airborne hyperspectral imagery. Temporally and spatially downscaled LST compared well to independent observations from a network of 20 micrometeorological towers and piloted aircrafts in addition to Landsat‐based LST retrieval and drone‐based LST observed at one tower site. The downscaled 50‐m hourly LST showed good relationships with tower (r2 = 0.79, RMSE = 3.5 K) and airborne (r2 = 0.75, RMSE = 2.4 K) observations over space and time, with precision lower over wetlands and lakes, and some improvement for capturing spatio‐temporal variation compared to a geostationary satellite. Further downscaling to 10 m using hyperspectral imagery resolved hot and cold spots across the landscape as evidenced by independent drone LST, with significant reduction in RMSE by 1.3 K. These results demonstrate a simple pathway for multi‐sensor retrieval of high space and time resolution LST.
Altitudinal and Latitudinal Variations in Ionospheric Sporadic‐E Layer Obtained From FORMOSAT‐3/COSMIC Radio Occultation
Authors: Qiu Lihui , Yu Tao , Yan Xiangxiang , Sun Yang‐Yi , Zuo Xiaomin , Yang Na , Wang Jin , Qi Yifan 
Published: September 2021

AbstractSporadic E (Es) layers are known for their layered structures with enhanced electron density. Recently, some scientists have studied the relationship between the occurrence rate and intensity of the Es layer in the global distribution. However, the relationship between the Es layer parameters (Es layer occurrence rate, Es layer intensity, Es layer thickness) in the vertical direction seems to be ignored to date. This paper highlights the vertical profiles of the occurrence rate, intensity, and thickness of the Es layers by using scintillation index (S4) from FORMOSAT‐3/COSMIC satellites from July 2007 to March 2015. The results show that there are some persistent differences between the occurrence rate, intensity, and thickness of the Es layers in the vertical profiles, which is different from their general similarity in the latitude distribution. It is found that the Es layer occurrence rate has a maximum value at ∼102 km altitude, but the Es layer intensity and Es layer thickness reach their maximum at an altitude of ∼110 km. Besides, the intensity and thickness of the Es layer exhibit a high linear relationship, which suggests that the larger electron density of the Es layer, the thicker its thickness. The Horizontal Wind Model (HWM14) indicates that the latitudinal variations in Es layers parameters are highly coincident with the zonal wind shear. However, the altitudinal variations in Es layers parameters do not agree well with the zonal wind shear.
Discrete Aurora on Mars: Spectral Properties, Vertical Profiles, and Electron Energies
Authors: Soret Lauriane , Gérard Jean‐Claude , Schneider Nicholas , Jain Sonal , Milby Zachariah , Ritter Birgit , Hubert Benoît , Weber Tristan 
Published: September 2021

AbstractWe present an analysis of hundreds of middle ultraviolet auroral spectra collected at the limb with the Imaging UltraViolet Spectrograph (IUVS) instrument on board the Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft. While the companion paper by Schneider et al. (2021), https://doi.org/10.1029/2021JA029428 focuses on the detection, location, and occurrence frequency of discrete auroral events, this study addresses the spectral properties and vertical profiles of the auroral emissions. Our independent selection of events is based on a combination of automatic and manual detection methods with adequate signal‐to‐noise ratio of both the CO Cameron bands and the CO2+ ultraviolet doublet (UVD) at 190–270 and 288–289 nm, respectively. We find that the ratio of these two features remains quasi‐constant for UVD intensities exceeding ∼200 rayleighs (R), but the CO Cameron/CO2+ UVD ratio may become increasingly large for low UVD intensities. Three weak N2 Vegard‐Kaplan bands are identified in the Martian aurora for the first time. Limb profiles of the [OI] line at 297.2 nm indicate that the visible oxygen green line brightness may reach a few kilorayleighs. The distribution of the altitude of the emission peaks in the aurora is identical in and out of the region of crustal magnetic field located in the southern hemisphere. Comparisons of in situ measurements of electron energy spectra and ultraviolet auroral detections have been made for five optical detections. They generally show temporal coincidence but not necessarily quantitative agreement with the altitude and brightness expected from the characteristics of the measured electron energy spectra.
A Review of Electrostatic Solitary Wave Research From the Cluster Mission
Authors: Pickett J. S. 
Published: September 2021

AbstractA review of the advancements in the knowledge of electrostatic solitary waves (ESWs) made with data obtained by the four satellite Cluster mission, after 20 years in orbit, is presented. ESWs are nonlinear solitary waves or structures observed in high time resolution waveform data. The ESW pulses are the wave data representation of electron or ion phase‐space holes, or density/acoustic structures, and are observed throughout the Cluster orbit, particularly at boundary layers, in turbulent plasmas, and wherever there is mixing of plasmas, such as in the magnetotail with the onset of a super‐substorm. Much of the research reviewed here involves ESWs involved in the magnetic reconnection processes of Earth, with their mapping across the separatrix region. One of the major advancements in ESW knowledge came from investigating propagation from one spacecraft to another, thus addressing the issue of lifetime and stability of these structures which cannot be adequately addressed with single spacecraft propagation studies. Knowing how stable the ESWs are can help determine their generation mechanism, which was also addressed in many of the papers discussed herein through observations and theory. The ESWs were found to be generated through a mix of instabilities and processes, namely two‐stream, Buneman, bump‐on‐tail, electron‐ion, beam‐plasma, electron and ion acoustic instabilities, and out of turbulence.
Soil Microbial Biomass Carbon and Freeze‐Thaw Cycles Drive Seasonal Changes in Soil Microbial Quotient Along a Steep Altitudinal Gradient
Authors: Cao Rui , Yang Wanqin , Chang Chenhui , Wang Zhuang , Wang Qin , Jiang Yurui , Li Han , Tan Bo 
Published: September 2021

AbstractUnderstanding seasonal changes in soil microbial quotient (qMB, i.e., the MBC‐to‐SOC ratio) along altitudinal gradients and their dominant drivers is essential for determining the effects of environmental changes on the soil organic carbon pool. A 3‐year in situ soil core incubation experiment was thus conducted in a dry valley shrub, a valley‐mountain ecotone forest, a subalpine coniferous forest, an alpine coniferous forest, and an alpine meadow across a 2,431‐m altitudinal gradient on eastern the Qinghai‐Tibetan Plateau. Soil qMB in the soil organic layer (OL) and mineral soil layer (ML) was measured at five critical periods. The average soil qMB was significantly higher in the alpine meadow than at other sites, with no significant difference among the other sites. The average soil qMB in this region was less than the global average value (1.2%), indicating that the soil organic carbon pool of the local ecosystem has higher stability and a lower mineralization potential than that of the other ecosystems globally. Seasonal variations in soil qMB differed along the altitudinal gradient. Significant increases in soil qMB during the 3‐year incubation were mainly observed in the OL at higher altitudes, implying increased sensitivity of the soil organic carbon pool to environmental changes. Microbial biomass carbon and soil freeze‐thaw cycles were critical factors determining the altitudinal pattern and seasonal changes in soil qMB. Soil microbial biomass and freeze‐thaw regime changes under global climate change scenarios will alter the balance between SOC microbial assimilation and maintenance respiration demands, affecting soil carbon biogeochemical cycling in mountainous ecosystems.
Multi‐Receiver Augmentation to Advanced Indian MST Radar (AIR)—Implementation of Spaced Antenna Technique
Authors: Kumar Shridhar , Rao T. Narayana , Rao M. Durga , Kamaraj P. 
Published: September 2021

AbstractNewly acquired multi‐receiver capability of Advanced Indian MST radar has been utilized to implement the spaced antenna (SA) technique for profiling of winds and turbulence. Two experiments were conducted. In Experiment 1, in addition to the traditional Full Correlation Analysis (FCA), SA analysis is also performed on off‐vertical beam measurements (hereafter Oblique Spaced Antenna [OSA]) and the products are evaluated against those retrieved with Doppler Beam Swinging (DBS) and collocated GPS radiosonde. In Experiment 2, the dependence of height coverage on antenna aperture is examined. The synchronization and phase matching of receiving channels are found to be well within the designed values. The consensus averaged zonal and meridional wind velocities obtained by FCA and OSA compare very well with DBS and radiosonde measurements with correlation coefficients >0.85 and root mean square error (RMSE) < 2 ms−1. The mean value of antenna parameter, , extracted from correlation of different antenna pairs compare well with the theoretical estimate. The efficacy of in quality controlling the SA derived winds has been examined. Imposing condition has certainly removed several outliers and reduced the RMSE (relative to reference) considerably, but it also reduced useful data by 50%. The consensus averaging of winds is found to be more effective in removing outliers and reducing the RMSE. The wind variances estimated by DBS (after accounting the non‐turbulent contributions) and SA agree quite well with a correlation coefficient of 0.95. Utilization of a bigger array increased the height coverage from 10‐12 to 20 km.
Analysis of Channel Characteristics Between Satellite and Space Station in Terahertz Band Based on Ray Tracing
Authors: Yang Jinsheng , Li He , Xu Zhan 
Published: September 2021

AbstractA time‐varying multi‐ray channel model suitable for inter‐satellite link simulation and performance evaluation is proposed aiming at the characteristics of the space communication environment. This model analyzes the propagation process and multi‐dimensional characteristics of the terahertz (THz) waves between the satellite and the space station. The receiving environment of the space station is constantly changing due to the rotation of the station's solar panels with the sun and the relative motion between the station and the satellite. To predict critical multipath events for a specific communication configuration, the method of ray tracing, which is combined with the consistent orbiting theory and geometric orbital theory, is used to analyze the channel characteristics of different inter‐satellite links at the THz band (220 GHz). The research content includes the path loss model, the multipath statistics, the small scale fading and some other related channel characteristics. The space THz multi‐dimensional time domain, space domain, and frequency domain characteristics are obtained by studying the structural characteristics of the space station and space environment, the law of position change between the space station and the satellite, and the relative motion between the satellite and the space station. The study on the characteristics of the THz time‐varying channel provides a reference for the prediction and planning of THz wave propagation in future inter‐satellite links.
Bedrock Groundwater Catchment Area Unveils Rainfall‐Runoff Processes in Headwater Basins
Authors: Masaoka N. , Kosugi K. , Fujimoto M. 
Published: September 2021

AbstractBedrock groundwater (BGW) has a contribution area that differs from that of the surface watershed. To date, there has been no analysis using BGW observations to determine to what extent the BGW catchment area influences surface runoff characteristics. This study determined the BGW catchment area from the water table, using densely nested boring wells (61 in bedrock and three in the soil layer) drilled in the granitic basin (2.3 ha). Streamflow runoff was also measured concurrently across the entire watershed (F0) and the subwatersheds (F1 to F6). The BGW catchment area of F3 accounted for 191% of the watershed area derived from surface topography, reducing the area of adjacent watersheds through cross‐watershed flow. The annual precipitation input to the BGW catchment area and baseflow volume was highly correlated, indicating that the BGW catchment area reflected the actual catchment effect in the bedrock layer more accurately than the surface watershed area. The degree of bedrock weathering showed that the BGW table was distributed along the boundary of the CL–CM classes. The estimated actual permeability of the CM class bedrock based on the deep percolation rate suggests that the depth near the CL–CM boundary is the hydrological basement surface; this defines the BGW catchment area. This study demonstrates that the BGW catchment area concept provides an accurate prediction of streamflow runoff in mountainous headwater basins that are heavily governed by hydrological processes in bedrock.