Results 41 to 50 of about 166,611,752 (300)

Application of the calculus of variations in determining optimum flight profiles for commercial short haul aircraft [PDF]

open access: yes, 1966
December 1966Includes bibliographical references (p. 52-53)The method of steepest descent of the calculus of variations is used to determine the optimal flight profile of a hypothetical tilt wing aircraft travelling a distance of 50 miles.
Gallant, Robert Alfred
core  

Nanocrystalline Lead Halide Perovskites to Boost Time‐of‐Flight Performance of Medical Imaging Detectors

open access: yesAdvanced Materials Interfaces
Time‐of‐flight (TOF) technique, traditionally used in high energy physics (HEP) and positron emission tomography (PET), is now being explored for lower energy applications like computed tomography (CT).
Fiammetta Pagano   +6 more
doaj   +1 more source

Portable offline indoor object recognition system for the visually impaired

open access: yesCogent Engineering, 2020
This article presents an indoor assistive system that addresses the challenges faced by visually impaired individuals. The proposed system helps the visually impaired individuals to move indoor and make them independent of any external assistance.
Mohammed Noman   +2 more
doaj   +1 more source

Contactless Vital Sign Monitoring System for Heart and Respiratory Rate Measurements with Motion Compensation Using a Near-Infrared Time-of-Flight Camera

open access: yesApplied Sciences, 2021
This study describes a contactless vital sign monitoring (CVSM) system capable of measuring heart rate (HR) and respiration rate (RR) using a low-power, indirect time-of-flight (ToF) camera.
Kaiwen Guo   +5 more
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

open access: yesMolecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Flight tests of a digital data acquisition system for analysis of ultrasonic pulse-echo signals used to measure ice accretion [PDF]

open access: yes, 1986
May 1986Also issued as an M.S. thesis, Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics, 1986Includes bibliographical references (p.
Ryan, Justin Mark, Hansman, Robert John.
core  

TIMo—A Dataset for Indoor Building Monitoring with a Time-of-Flight Camera

open access: yesSensors, 2022
We present TIMo (Time-of-flight Indoor Monitoring), a dataset for video-based monitoring of indoor spaces captured using a time-of-flight (ToF) camera. The resulting depth videos feature people performing a set of different predefined actions, for which ...
Pascal Schneider   +6 more
doaj   +1 more source

Analysing the significance of small conformational changes and low occupancy states in serial crystallographic data

open access: yesFEBS Open Bio, EarlyView.
This protocol paper outlines methods to establish the success of a time‐resolved serial crystallographic experiment, by means of statistical analysis of timepoint data in reciprocal space and models in real space. We show how to amplify the signal from excited states to visualise structural changes in successful experiments.
Jake Hill   +4 more
wiley   +1 more source

Towards Higher Sensitivity of Mass Spectrometry: A Perspective From the Mass Analyzers

open access: yesFrontiers in Chemistry, 2021
Mass spectrometry (MS) is one of the most widely used analytical techniques in many fields. Recent developments in chemical and biological researches have drawn much attention to the measurement of substances with low abundances in samples.
Chang Li   +8 more
doaj   +1 more source

Time‐restricted feeding prior to Mycobacterium tuberculosis infection reduces tissue CD4+ T cells with limited impact on bacterial clearance

open access: yesFEBS Open Bio, EarlyView.
Time‐restricted feeding (TRF) in mice increased liver fatty acid oxidation and decreased fatty acid biosynthesis. These alterations persisted when TRF was discontinued and the host was infected with Mycobacterium tuberculosis. Pre‐exposure to TRF did not alter tissue (lung and spleen) mycobacterial burden but significantly reduced CD3+ T cells in lungs
Ashish Gupta   +7 more
wiley   +1 more source

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