Results 101 to 110 of about 335,884 (300)

Effective equation of state and energy conditions in phantom/tachyon inflationary cosmology perturbed by quantum effects

, 2003
We discuss the model consisting of tachyon which may have the negative kinetic energy plus scalar phantom and plus conformal quantum matter. It is demonstrated that such a model naturally admits two deSitter phases where the early universe inflation is ...
Bagla, Benaoum, Bento, Boisseau, Caldwell, Carroll, Chen, Chiba, Chiba, Chimento, Cline, Das, Diamandis, Fairbairn, Faraoni, Feinstein, Felder, Frampton, Garousi, Gibbons, Gibbons, Gibbons, Gibbons, Gibbons, Hao, Hao, Hao, Ishida, Kim, Kim, Kutasov, Leblond, Lee, Li, Luson, Majumdar, Maor, Matsuda, Mehen, Melchiorri, Moeller, Mukohyama, Nojiri, Nojiri, Nojiri, Nojiri, Okuda, Onemli, Parker, Perlmutter, Perlmutter, Riess, Sami, Schulz, Sen, Sen, Sergei D. Odintsov, Shin'ichi Nojiri, Shiu, Singh, Torres   +60 more
core   +1 more source

Study on the Radiation Dose Distribution of Abdominal CT Scans Based on Dose Simulation Humans

CT Lilun yu yingyong yanjiu
Objective: This study aimed to systematically measure and analyze the radiation dose distribution in the abdomen and specific areas of interest on the body surface during abdominal CT scans using a dose simulation phantom, providing relevant data to ...
Xiaolong NI, Fengyun ZHOU, Zheng SHI, Yongzhong MA, Xiaoguang CHENG   +4 more
doaj   +1 more source

Effects of the Fluid Replacement Method During Online Hemodiafiltration on the Solute Removal Performance and Biocompatibility Using the Asymmetric Cellulose Triacetate Membrane

Therapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Introduction Pre‐dilution online hemodiafiltration (Pre‐HDF) is predominantly used in Japan, whereas post‐dilution online HDF (Post‐HDF) is more common in Europe. An asymmetric cellulose triacetate (ATA) membrane may improve biocompatibility.
Kenji Sakurai, Yoshitaka Kurihara, Fumi Yamauchi, Hiromi Hosoya, Takeshi Saito   +4 more
wiley   +1 more source

A Phantom Experimental Study on Improving the Imaging Quality of Stent CT at a Fast Heart Rate

CT Lilun yu yingyong yanjiu
Objective: This study aimed to investigate the impact of different imaging parameters on stent imaging and stenosis assessment in a fast heart rate model.
Tian MA, Fang LI, Yan ZHOU, Yinghao XU, Yi HE   +4 more
doaj   +1 more source

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Attractor Behavior of Phantom Cosmology

, 2005
We investigate the cosmological attractor of the minimally coupled, self-interacting phantom field with a positive energy density but negative pressure.
Aguirregabiria, Barrow, Bastero-Gil, Caldwell, Caldwell, Carroll, Chiba, Dabrowski, Frampton, Gibbons, Guo, Guo, Guo, Guo, Kehagias, Liddle, Lidsey, Meng, Mersini, Nojiri, Nojiri, Piao, Piao, Pollock, Sami, Schulz, Singh, Torres, Yuan-Zhong Zhang, Yun-Song Piao, Zong-Kuan Guo   +30 more
core   +1 more source

The phantom illusion

Vision Research, 2015
It is well known that visible luminance gradients may generate contrast effects. In this work we present a new paradoxical illusion in which the luminance range of gradual transitions has been reduced to make them invisible. By adopting the phenomenological method proposed by Kanizsa, we have found that unnoticeable luminance gradients still generate ...
GALMONTE, ALESSANDRA, Soranzo, Alessandro, Rudd, Michael E., AGOSTINI, TIZIANO   +3 more
openaire   +4 more sources

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Analysis of Influencing Factors on Pulmonary Nodule Detection by Computed Tomography with Artificial Intelligence: A Phantom Study

CT Lilun yu yingyong yanjiu
Objective: This study aimed to analyze the factors influencing artificial intelligence (AI) diagnostic system detection of pulmonary nodules on computed tomography (CT) scans, using a chest simulation phantom experiment with simulated lung nodules ...
Qiang LIU, Yongming ZENG, Jingkun SUN, Hao LOU, Xianmei XIA, Bing GE, Yu ZHOU, Yue ZHENG   +7 more
doaj   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source