Results 51 to 60 of about 10,708 (161)

Naeronambul: The Progressive Paradox in Educational Inequality

open access: yesPolitics &Policy, Volume 53, Issue 5, October 2025.
ABSTRACT This study examines the influence of subjective social class on attitudes towards education, arguing that it outweighs ideological orientation. Analyzing cross‐national survey data, the findings challenge conventional assumptions about ideological divides, revealing a convergence between progressives and conservatives when subjective class is ...
Seungwoo Han
wiley   +1 more source

Predicting Multi-Scenario Land Use Changes and Soil Erosion in the Huaihe River Basin Based on Coupled PLUS-CSLE Model [PDF]

open access: yes
[Objective] Understanding the future temporal and spatial evolution of land use and soil erosion in the Huaihe River Basin is of significant importance for rational and coordinated use of land resources, formulating future soil and water conservation ...
CHEN Lei   +8 more
core   +1 more source

Assessment of the Threat Status of Bent‐Toed Geckos (Cyrtodactylus) in Indochina: Implementation of the One Plan Approach

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 464-475, September 2025.
This study investigates the diversity, conservation status, distribution, and discovery rate of 84 Cyrtodactylus species in Indochina. Despite rising discovery rates, many species are unassessed, with over half unprotected and 90.5% endemic. This study suggests expanding protected areas and implementing an integrated approach to conservation with IUCN ...
Matilda Julia Lasota   +6 more
wiley   +1 more source

珠三角地区不同地形条件下绝缘子污秽积累规律的研究

open access: yesGaoya dianqi, 2012
笔者选取中国珠江三角洲地区220 kV输电线路上的4个试验点,结合珠三角地区的年降水分布与城市热岛效应等因素,通过分析试验点上绝缘子的盐密(ESDD)和灰密(NSDD)变化来研究珠三角地区不同地形下绝缘子表面积污积累规律。研究表明:绝缘子的ESDD受降雨影响较大而NSDD较小;影响绝缘子积污的主要因素是降雨量和污染源;绝缘子的最大污秽度出现在雨季第1场降雨之前;不同地形下绝缘子表面积污积累规律不同;热岛效应在污秽积累过程中起了重要作用。
张本皇   +4 more
doaj  

Staghorn Ferns in Botanical Gardens: Which Species Do We Really Cultivate or Trade? 植物园中的鹿角蕨:我们真正保育或买卖的是什么?

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 416-429, September 2025.
Staghorn ferns are among the most highly valued ornamental plants but several species experience major extinction threats. Here we establish a DNA barcoding reference dataset to support reliable identification of cultivated staghorn ferns to secure species identity of individuals at all life stages that are used in ex situ and in situ conservation of ...
Kaikai Wang   +6 more
wiley   +1 more source

黄土高原土壤养分空间变异的多尺度分析--以横山县为例

open access: yesShuitu Baochi Xuebao, 2005
人类干扰所造成的土地利用和植被的镶嵌化分布及地貌特征等影响着土壤养分的空间分异,黄土丘陵沟壑区土壤退化严重,使得土壤特性对其环境因子的变化更加敏感。以横山县为例,从两种尺度上,利用野外调查,实验室分析和典范对应分析(CCA),得到不同尺度下(小流域尺度和县域尺度)土壤理化性质对环境因子的响应。结果表明,坡度是影响土壤养分的重要影响因子,小流域尺度上,坡度和土壤养分、土壤黏粒含量成正相关;县域尺度上,坡度和主要土壤养分等呈负相关。而海拔高度和坡向对土壤养分的影响仅次于坡度,在不同尺度上也有差异 ...
刘世梁 郭旭东 连纲 傅伯杰 王静
doaj  

Historical and Cultural Legacy of Post‐One Child Policy: Is China Ready to Embrace Planned Oocyte Cryopreservation?

open access: yesWorld Medical &Health Policy, Volume 17, Issue 3, Page 580-588, September 2025.
ABSTRACT Women's reproductive rights in China are shaped by geopolitical and cultural factors, resulting in restricted access to planned oocyte cryopreservation (planned OC). While the global discourse surrounding planned OC continues to evolve, China currently sanctions egg freezing for medical purposes exclusively in married women, while prohibiting ...
Olivia M. Y. Ngan   +2 more
wiley   +1 more source

地形因子计算方法对土壤侵蚀评价的影响

open access: yesShuitu Baochi Xuebao, 2019
选取嫩江县、怀来县、吴起县、开州区、长汀县5个区域1:1万地形图,生成5 m分辨率的DEM作为数据源。分别用分段坡长法和汇流面积法计算了坡长坡度因子,并用中国土壤流失方程(CSLE)计算了土壤侵蚀模数,评价了土壤侵蚀强度,对比分析了分段坡长法和汇流面积法对坡长因子及水土流失面积的影响。结果表明:采用汇流面积法提取的坡长因子值和空间分布差异比分段坡长法更大,2种方法的低值区差异较小,高值区差异较大。2种方法计算水土流失面积比例差异不大,而在计算土壤侵蚀强度上显示出明显的差异 ...
梁晓珍, 符素华, 丁琳
doaj  

砒砂岩区小流域坡沟系统地形及侵蚀分异规律

open access: yesShuitu Baochi Xuebao, 2022
作为黄河流域典型生态脆弱区之一的砒砂岩区,水土流失治理难度大,区域地形、侵蚀在坡沟系统的分布迥异。区域土壤侵蚀研究多集中于刻画侵蚀空间分布及不同地类差异性研究,从坡沟系统细化开展研究工作较少,不能较好地为后续精细化治理提供支撑。因此,选取位于准格尔旗的3个典型砒砂岩区小流域,结合目视解译的流域沟沿线,开展了流域地形、水力侵蚀分布规律及其关联性研究。结果表明:流域地形因子分布特征与地貌特征分布一致,高值集中分布在沟道,低值则集中在坡面,且特拉沟小流域(覆沙)沟道处的地形因子统计值最大 ...
谢梦瑶   +5 more
doaj  

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