Transit (satellite)
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The TESS science processing operations center Open
The Transiting Exoplanet Survey Satellite (TESS) will conduct a search for Earths closest cousins starting in late 2017. TESS will discover approx.1,000 small planets and measure the masses of at least 50 of these small worlds. The Science…
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Kepler Mission Design, Realized Photometric Performance, and Early Science Open
The Kepler Mission, launched on 2009 March 6, was designed with the explicit capability to detect Earth-size planets in the habitable zone of solar-like stars using the transit photometry method. Results from just 43 days of data along wit…
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Multipurpose UAV for search and rescue operations in mountain avalanche events Open
This paper presents a multipurpose UAV (unmanned aerial vehicle) for mountain rescue operations. The multi-rotors based flying platform and its embedded avionics are designed to meet environmental requirements for mountainous terrain such …
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The nature of the TRAPPIST-1 exoplanets Open
Context. The TRAPPIST-1 system hosts seven Earth-sized, temperate exoplanets orbiting an ultra-cool dwarf star. As such, it represents a remarkable setting to study the formation and evolution of terrestrial planets that formed in the same…
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The impacts of COVID-19 pandemic on public transit demand in the United States Open
The COVID-19 pandemic and related restrictions led to major transit demand decline for many public transit systems in the United States. This paper is a systematic analysis of the dynamics and dimensions of this unprecedented decline. Usin…
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Refining the Transit-timing and Photometric Analysis of TRAPPIST-1: Masses, Radii, Densities, Dynamics, and Ephemerides Open
We have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years. We add to these ground-based, HST, and K2 transit-time measurements, and revisit an N -body dynamical analysis of the seven-planet …
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Donor metabolic characteristics drive effects of faecal microbiota transplantation on recipient insulin sensitivity, energy expenditure and intestinal transit time Open
Objective Bariatric surgery improves glucose metabolism. Recent data suggest that faecal microbiota transplantation (FMT) using faeces from postbariatric surgery diet-induced obese mice in germ-free mice improves glucose metabolism and int…
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The Next Generation Transit Survey (NGTS) Open
We describe the Next Generation Transit Survey (NGTS), which is a ground-based project searching for transiting exoplanets orbiting bright stars. NGTS builds on the legacy of previous surveys, most notably WASP, and is designed to achieve …
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Density, not radius, separates rocky and water-rich small planets orbiting M dwarf stars Open
Exoplanets smaller than Neptune are common around red dwarf stars (M dwarfs), with those that transit their host star constituting the bulk of known temperate worlds amenable for atmospheric characterization. We analyze the masses and radi…
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Grand Challenges in Transportation and Transit Systems Open
Transportation and transit systems draw upon broad spectra of research fields due to the diversity and interconnectivity of transport modes, including road, rail, aviation, pipeline, maritime, or even aerospace. These systems have evolved …
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THE KEPLER FOLLOW-UP OBSERVATION PROGRAM. I. A CATALOG OF COMPANIONS TO KEPLER STARS FROM HIGH-RESOLUTION IMAGING Open
We present results from high-resolution, optical to near-IR imaging of host stars of Kepler Objects of Interest (KOIs), identified in the original Kepler field. Part of the data were obtained under the Kepler imaging follow-up observation …
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Public transit use in the United States in the era of COVID-19: Transit riders’ travel behavior in the COVID-19 impact and recovery period Open
COVID-19 has upended travel across the world, disrupting commute patterns, mode choices, and public transit systems. In the United States, changes to transit service and reductions in passenger volume due to COVID-19 are lasting longer tha…
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A spectral survey of an ultra-hot Jupiter Open
Context. KELT-9 b exemplifies a newly emerging class of short-period gaseous exoplanets that tend to orbit hot, early type stars – termed ultra-hot Jupiters. The severe stellar irradiation heats their atmospheres to temperatures of ~4000 K…
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Transit-oriented development and gentrification: a systematic review Open
The last two decades have witnessed a growing trend towards transit-oriented development (TOD) as a critical approach for achieving sustainable mobility. However, some analysts and community activists have expressed concerns that TOD could…
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TRANSIT TIMING OBSERVATIONS FROM KEPLER. IX. CATALOG OF THE FULL LONG-CADENCE DATA SET Open
We present a new transit timing catalog of 2599 Kepler Objects of Interest (KOIs), using the PDC-MAP long-cadence light curves that include the full 17 quarters of the mission ( ftp://wise-ftp.tau.ac.il/pub/tauttv/TTV/ver_112 ). The goal i…
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Transit passengers’ behavioural intentions: the influence of service quality and customer satisfaction Open
Knowing passengers’ behavioural intentions to use transit service can be a useful support for transit managers and marketers who can define the most convenient strategies to satisfy existing passengers and attract new ones. We retain that …
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Observing transiting planets with JWST Open
Context. The James Webb Space Telescope will enable astronomers to obtain exoplanet spectra of unprecedented precision. The MIRI instrument especially may shed light on the nature of the cloud particles obscuring planetary transmission spe…
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K2SC: Flexible systematics correction and detrending of<i>K2</i>light curves using Gaussian Process regression Open
We present k2sc (K2 Systematics Correction), a python pipeline to model instrumental systematics and astrophysical variability in light curves from the K2 mission. k2sc uses Gaussian Process regression to model position-dependent systemati…
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Habitable worlds with <i>JWST</i>: transit spectroscopy of the TRAPPIST-1 system? Open
The recent discovery of three Earth-sized, potentially habitable planets around a nearby cool star, TRAPPIST-1, has provided three key targets for the upcoming James Webb Space Telescope (JWST). Depending on their atmospheric characteristi…
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Urban Transit System Microbial Communities Differ by Surface Type and Interaction with Humans and the Environment Open
Mass transit environments, specifically, urban subways, are distinct microbial environments with high occupant densities, diversities, and turnovers, and they are thus especially relevant to public health. Despite this, only three culture-…
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The Ocean-Going Autonomous Ship—Challenges and Threats Open
Unmanned vehicles have become a part of everyday life, not only in the air, but also at sea. In the case of sea, until now this usually meant small platforms operating near shores, usually for surveying or research purposes. However, exper…
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Estimates of African Dust Deposition Along the Trans‐Atlantic Transit Using the Decadelong Record of Aerosol Measurements from CALIOP, MODIS, MISR, and IASI Open
Deposition of mineral dust into ocean fertilizes ecosystems and influences biogeochemical cycles and climate. In situ observations of dust deposition are scarce, and model simulations depend on the highly parameterized representations of d…
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Theory of urban fabrics: planning the walking, transit/public transport and automobile/motor car cities for reduced car dependency Open
The theory of urban fabrics is outlined showing how different types of cities are combinations of walking, transit/public transport and automobile/motor car fabrics based on their transport systems and the universal travel-time budget. The…
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The muddle of ages, turnover, transit, and residence times in the carbon cycle Open
Comparisons among ecosystem models or ecosystem dynamics along environmental gradients commonly rely on metrics that integrate different processes into a useful diagnostic. Terms such as age, turnover, residence, and transit times are ofte…
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TESS Discovery of an Ultra-short-period Planet around the Nearby M Dwarf LHS 3844 Open
Data from the newly commissioned Transiting Exoplanet Survey Satellite has revealed a “hot Earth” around LHS 3844, an M dwarf located 15 pc away. The planet has a radius of R ⊕ and orbits the star every 11 hr. Although the existence of an …
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Invest in the ride: A 14 year longitudinal analysis of the determinants of public transport ridership in 25 North American cities Open
Public transport ridership has been steadily increasing since the early 2000s in many urban areas in North America. However, many cities have more recently seen their transit ridership plateaued, if not decreased. This trend in transit rid…
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How formation time-scales affect the period dependence of the transition between rocky super-Earths and gaseous sub-Neptunesand implications for η⊕ Open
One of the most significant advances by NASA's ${\\mathit Kepler}$ Mission was\nthe discovery of an abundant new population of highly irradiated planets with\nsizes between the Earth and Neptune. Subsequent analysis showed that at ~1.5\nEa…
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Transiting exoplanets from the CoRoT space mission Open
Aims. We report the discovery as well as the orbital and physical characterizations of two new transiting giant exoplanets, CoRoT-30 b and CoRoT-31 b, with the CoRoT space telescope. Methods. We analyzed two complementary data sets: photom…
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Transport solutions for cleaner air Open
In cities across the globe, road transport remains an important source of air pollutants that are linked with acute and chronic health effects. Decreasing vehicle emissions—while maintaining or increasing commuter journeys—remains a major …
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Is transit-oriented development (TOD) an internationally transferable policy concept? Open
Many cities and regions have embraced the concept of transit-oriented development (TOD). This paper explores how transfer of TOD as a policy concept impacts its implementation in the Netherlands. The study determined international policy i…