Showing 241 - 260 results of 314 for search '"difference in difference"', query time: 0.13s Refine Results
  1. 241

    Micro CT evaluation of marginal discrepancies of endocrown restored molars with different intrapulpal depths and materials of fabrication. (in-vitro study) by Mohamed Aly Mohamed Badr Elagwany, Amina Mohamed Hamdy, Maged Mohamed Zohdy, Aliaa Mahrous, Ahmed Tawfik, Soha Osama Nabih

    Published 2025-01-01
    “…Results Regarding cavity depths, there was a significant difference between different groups (p < 0.001). The highest value was found in samples with 4 mm extension (84.35 ± 18.16), followed by samples with 2 mm extension (66.52 ± 21.86), while the lowest value was found in samples without pulpal extension (59.41 ± 22.16). …”
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  2. 242

    Topsoil Compaction Risk Based on the Different Responses of Soil Structure to Compaction Stress by Huiqing Zhang, Tingfeng He

    Published 2024-12-01
    “…As soil structures respond differently to different degrees of compaction stress, early warnings for the risk of soil compaction caused by agricultural machinery need to be provided based on changes to the soil structure. …”
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  3. 243

    The Thermal Effect on the Physical Properties and Corresponding Permeability Evolution of the Heat-Treated Sandstones by Xianshan Liu, Weiluo Lu, Man Li, Nandou Zeng, Tao Li

    Published 2020-01-01
    “…It can be seen that the quality, porosity, uniaxial compression strength, and elastic modulus of the heated sandstones vary differently with different heat-treated temperature. As for the permeability tests in the process of gradual failure under triaxial loading conditions, the permeability variation divided by four variation stages is the same as that under room temperature condition, and the initial permeability, minimum permeability, and maximum permeability have been characterized with temperature variation, showing that the permeability variation in a certain temperature range from 400°C to 600°C presents more obvious than that in other temperature ranges. …”
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  4. 244

    Study on needle anatomical structure and drought resistance of 15 spruce species by ZHAO Li, BAO Xiulan, WANG Fude, FU Sheng, LIU Lijie, HUO Kaiyu

    Published 2025-01-01
    “…The mesophyll had no differentiation of palisade tissue and spongy tissue. (2) There were significant differences in different indexes of the anatomical structure of the needles among the 15 spruce species. …”
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  5. 245

    Relationship Between Bi-Caudate Ratio and White Matter Atrophy in Brain MRI of Multiple Sclerosis by Hussein Soleimantabar, Shno Hosseini

    Published 2025-01-01
    “…EDSS score, age of the disease onset, SDMT score, and BCR were significantly different between different MS types (secondary progressive MS, primary progressive MS, and relapsing-remitting MS) (P-values<0.05). …”
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  6. 246

    The Interaction Force between Scheelite and Scheelite/Fluorite/Calcite Measured Using Atomic Force Microscopy by Junyan Yang, Shen Qi, Bo Song, Qi Zheng, Xiaokui Che, Lijun Wang

    Published 2020-01-01
    “…Zeta potential measurement results confirmed the adsorption of sodium oleate on scheelite, fluorite, and calcite surface and surface potential difference at different pH values of ultrapure water. Contact angle measurement results confirmed the surface of nature scheelite, fluorite, and calcite was hydrophilic, and the surface after thread by sodium oleate solution was hydrophobic. …”
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  7. 247

    Strain Distribution Evaluation of Rat Tibia under Axial Compressive Load by Combining Strain Gauge Measurement and Finite Element Analysis by Jiazi Gao, Bei Liu, Min Zhang, He Gong, Bingzhao Gao

    Published 2019-01-01
    “…Slopes of the strain-load curves showed no significant differences among different peak loads (ANOVA; P>0.05), indicating that the strain-load relationship obtained from the strain gauge measurement was reasonable and stable. …”
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  8. 248

    The effects of unified pooling arrangement on health inequity in China: a DID-RIF approach by Jing Wu, Yuqing Liu, Chuncheng Wang, Lianjie Liu, Jiaqian Lu

    Published 2025-01-01
    “…Methods This study takes the provincial unified reform of basic medical insurance for urban employees in China as an example, uses the China Family Panel Studies (CFPS) data and related policy documents, and adopts the DID-RIF hybrid method to test the impact of the equalization of the medical insurance system on health inequity, by using the interaction term in the DID (Difference-in-Differences) model as the independent variable in the RIF (Recentered Influence Function) to exclude the influence of other interfering variables. …”
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  9. 249

    Experimental Investigation on Organic Matter Orientation Characteristics of Terrestrial and Marine Shale in China by Dunqing Liu, Hongkui Ge, Yinhao Shen, Kui Zhang

    Published 2021-01-01
    “…OM grains in shale tend to subparallel to the bedding section, and their orientation degree and controlling factors differ among different shales. OM grains in samples from terrestrial C-7(Chang-7 Formation) exhibit the strongest directionality in their arrangement, and OM grains in samples from marine LMX (Longmaxi Formation) shale in the Fuling area also exhibit strong directional alignment. …”
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  10. 250

    Evaluating the impact of adult education programs in Morocco: a quasi-experimental approach by Rachid Boukbech, Mariem Liouaeddine

    Published 2024-12-01
    “…The various matching techniques reveal a score difference ranging from 12 to 14 points in favor of program participants compared to those who did not participate. The Difference-in-Differences method confirms the positive and significant impact of the program. …”
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  11. 251

    Is leisure sedentary time associated with mental health issues? Evidence from China Health and Nutrition Survey by Hao Li, Hao Li, Weihong Zeng, Weihong Zeng

    Published 2025-02-01
    “…Potential endogeneity was addressed by instrumental variable (IV) method via two-stage least squares (2SLS) regression and a continuous difference-in-differences (DID) design.ResultsOur findings indicate that high levels of sedentary time are associated adversely with mental health issues. …”
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  12. 252

    Cross-Supervised LiDAR-Camera Fusion for 3D Object Detection by Chao Jie Zuo, Cao Yu Gu, Yi Kun Guo, Xiao Dong Miao

    Published 2025-01-01
    “…Due to inherent differences between different modalities, seeking an efficient and accurate fusion method is of great importance. …”
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  13. 253

    Using low-cost sensors to assess common air pollution sources across multiple residences by Catrin J. Rathbone, Dimitrios Bousiotis, Owain G. Rose, Francis D. Pope

    Published 2025-01-01
    “…The NMF is applied to combined data from all houses to generate source profiles that can be used to understand how PM source characteristics are similar or differ between different households in the same urban area. …”
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  14. 254

    Rapid Identification of Potassium Nutrition Stress in Rice Based on Machine Vision and Object-Oriented Segmentation by Lisu Chen, Shihan Huang, Yuanyuan Sun, Enyan Zhu, Ke Wang

    Published 2019-01-01
    “…Special symptoms could be observed on rice leaves when exposed to potassium deficiency, and these symptoms usually display differently under different potassium levels, which offer a foundation for rapid nutrition diagnosis. …”
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  15. 255
  16. 256

    Chemosensitivity of Anaplastic Thyroid Cancer Based on a Histoculture Drug Response Assay by Takashi Uruno, Chie Masaki, Junko Akaishi, Kenichi Matsuzu, Akifumi Suzuki, Keiko Ohkuwa, Hiroshi Shibuya, Wataru Kitagawa, Mitsuji Nagahama, Kiminori Sugino, Koichi Ito

    Published 2015-01-01
    “…Most recurrent samples had higher IRs than primary lesions, but the IRs of different drugs differed between primary and recurrent lesions, even with samples from the same patients. …”
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  17. 257
  18. 258

    Different Flooding Conditions Affected Microbial Diversity in Riparian Zone of Huihe Wetland by Bademu Qiqige, Jingjing Liu, Ming Li, Xiaosheng Hu, Weiwei Guo, Ping Wang, Yi Ding, Qiuying Zhi, Yuxuan Wu, Xiao Guan, Junsheng Li

    Published 2025-01-01
    “…The Shannon index of bacterial diversity was not significantly different in various flooding conditions (<i>p</i> > 0.05), however, fungal diversity and archaeal communities were significantly different in different flooding conditions (<i>p</i> < 0.05). …”
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  19. 259

    The heterogeneity of Pinus yunnanensis plantation growth was driven by soil microbial characteristics in different slope aspects by Zhongmu Li, Yong Chai, Chengjie Gao, Jin Li, Kai Cui

    Published 2025-01-01
    “…There were significant differences in soil microbial diversity and community structure between the different slope aspects, but there was no significant difference among different soil depths. The abundance of Proteobacteria on a sunny slope was lower than that on a shady slope, and the richness of Firmicutes and Planctomycetota was higher than that in a shady slope. …”
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  20. 260

    Effect of different ceramic materials and dentin sealing on occlusal veneers bond strength and fracture resistance by Dina Mohamed Nasr, Rewaa Gaber AboElHassan

    Published 2025-02-01
    “…Results For debonding forces and bond strength testing there were significant differences regarding different materials and dentin sealing strategies, while for fracture resistance, the material selection had a significant effect on it with no significant effects of dentin sealing strategies. …”
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