Results 71 to 80 of about 569,815 (265)

Study of Efficiency Fractal Optical Modulator for insulator material by testing modulation transfer function

مجلة علوم ذي قار, 2019
Chopper is an important component in optical system. It represents a device, which changes the angle between the coordinate and vision lines of the target for the electrical signal. The chopper modulates the optical signal by a frequency dependent on the
Mohammed L. Jabbar, Abbas Shwya Alwan   +1 more
doaj   +2 more sources

Frequency-Diverse Additive Processing for Active Incoherent Millimeter-Wave Imaging

IEEE Open Journal of Antennas and Propagation
We present an approach for improving spatial frequency sampling in active incoherent millimeter-wave (AIM) imaging systems using frequency diversity. AIM imaging relies on active transmission of spatio-temporally incoherent signals to illuminate a scene,
Jorge R. Colon-Berrios, Jeffrey A. Nanzer   +1 more
doaj   +1 more source

From the Heart to the Mind: Cardiac Vagal Tone Modulates Top-down and Bottom-up Visual Perception and Attention to Emotional Stimuli

Frontiers in Psychology, 2014
The neurovisceral integration model (Thayer & Lane, 2000) posits that cardiac vagal tone, indexed by heart rate variability (HRV), can indicate the functional integrity of the neural networks implicated in emotion-cognition interactions.
Gewnhi ePark, Julian F. Thayer
doaj   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

The Binocular Balance at High Spatial Frequencies as Revealed by the Binocular Orientation Combination Task

Frontiers in Human Neuroscience, 2019
How to precisely quantify the binocular eye balance (i.e., the contribution that each eye makes to the binocular percept) across a range of spatial frequencies using a binocular combination task, is an important issue in both clinical and basic research.
Yonghua Wang, Yonghua Wang, Yonghua Wang, Zhifen He, Zhifen He, Yunjie Liang, Yunjie Liang, Yiya Chen, Yiya Chen, Ling Gong, Ling Gong, Yu Mao, Yu Mao, Xiaoxin Chen, Xiaoxin Chen, Zhimo Yao, Zhimo Yao, Daniel P. Spiegel, Jia Qu, Jia Qu, Fan Lu, Fan Lu, Jiawei Zhou, Jiawei Zhou, Robert F. Hess   +24 more
doaj   +1 more source

Metastatic niche shaped by host factors influences disseminated cancer cell fate

FEBS Letters, EarlyView.
Metastasis is shaped not only by cancer cells but also by the environments they encounter. This review explores how factors such as aging, diet, the microbiome, lifestyle, and environmental exposures remodel organ‐specific niches in the lung, liver, bone, and brain, influencing where metastatic cells survive, remain dormant, or grow, and ultimately ...
Gwennan Delyth Ward, Álvaro Ruiz‐Tabas, Patricia Altea‐Manzano   +2 more
wiley   +1 more source

Smaller is better: nanobodies meet NMR

FEBS Letters, EarlyView.
Nanobodies are single‐domain antigen‐binding fragments derived from camelid heavy chain antibodies. Their small size, high stability, and exceptional specificity make nanobodies uniquely useful probes for NMR studies of protein dynamics, transient conformational states, and protein–protein interactions.
Oleg Y. Dmitriev
wiley   +1 more source

Invisible but not inaccessible—Revealing transient oligomers formed by intrinsically disordered proteins with solution NMR and complementary methods

FEBS Letters, EarlyView.
Transient oligomers formed by intrinsically disordered proteins may be ‘invisible’ to direct detection yet remain accessible to solution NMR through equilibrium‐exchange measurements and pressure‐jump experiments. Complementary methods report on mass, stoichiometry, selected distance distributions, morphology, and internal packing.
Martin D. Gelenter, Ad Bax
wiley   +1 more source

Emotional valence through pupil: Machine learning classification under controlled visual complexity and emotional arousal in young adults

Physiological Reports
Pupillometry has long been proposed as a noninvasive physiological measure for emotional valence. However, its empirical effectiveness remains inconclusive due to confounding visual and emotional factors.
Jung Joo Lee, Eun Seo Park, Hwa Jin Han, Young Il Cho   +3 more
doaj   +1 more source

DNA ligase LigE increases bacterial transformation with damaged extracellular DNA

FEBS Letters, EarlyView.
The DNA ligase LigE from the naturally competent Gram‐negative bacterium Neisseria gonorrhoaea increases transformation with cut extracellular DNA. This process is ATP‐dependent and relies on the catalytic activity of LigE; it also requires that LigE contains an intact periplasmic localisation sequence, indicating that ligE functions in the periplasm ...
Jolyn Pan, Avi Singh, Shrawani Weralupe Gamladdalage, Joanna Hicks, Adele Williamson   +4 more
wiley   +1 more source