Results 91 to 100 of about 1,943,870 (242)

The Return of the Allis Shad (Alosa alosa) to the Lower Navigable Reaches of the Seine: Locks Play a Role

open access: yesRiver Research and Applications, EarlyView.
ABSTRACT In France, it is estimated that shads (Alosa spp.) have lost 69% of their historical range, mainly due to disrupted river connectivity. After an absence of one century, signs of their return in the Seine River have been recorded over the past two decades: adult and juvenile specimens have been caught by anglers or recorded at video‐counting ...
Céline Le Pichon   +5 more
wiley   +1 more source

A Ship Traffic Model in a Marine Roundabout

open access: yesThe Journal of Japan Institute of Navigation, 1993
For congested sea areas a network with a roundabout at the bay centre has been proposed. A mathematical model was used to analyze traffic behaviour. The model describes ship behaviour merging onto the circulating lane from an approach of a roundabout, which is recognised as a sequence of T shaped crossings, and models the time adjustment behaviour of ...
Hideyuki KITA, Hajime KONDOH
openaire   +2 more sources

Multi‐Platform Deployments of Low‐Cost Devices for Cetacean Passive Acoustic Monitoring

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Recent advances in affordable, user‐friendly devices offer new opportunities to overcome cost constraints of underwater passive acoustic monitoring (PAM) and expand acoustic data collection. In this study, we deployed low‐cost acoustic recorders and underwater cameras across a range of platforms in the Western Mediterranean, including fishing gear ...
Greta Jankauskaite   +8 more
wiley   +1 more source

A Development Strategy for Marine Leisure Infrastructure [PDF]

open access: yes, 2001
In July 1999 the Marine Institute published an Investment Strategy for the Water-based Tourism and Leisure Sector in Ireland 2000-2006. The strategy recommended a programme of investment aimed at; (1) the provision of new infrastructure and facilities ...
Marine Institute
core   +1 more source

Satellite-based analysis of maritime traffic effects on water quality indicators in the Mediterranean basin

open access: yesEuropean Journal of Remote Sensing
This study investigates the impact of maritime traffic intensity on water quality indicators in the Mediterranean Sea during the post-pandemic period (2022–2024).
Sofiia Drozd   +7 more
doaj   +1 more source

Oregon traffic safety performance plan. Annual report

open access: yes, 1998
This archived document is maintained by the Oregon State Library as part of the Oregon Documents Depository Program. It is for informational purposes and may not be suitable for legal purposes.Fiscal year 1998-Vols.

core  

Dynamic Cell Division for Interference Management in Satellite Direct‐to‐Cell Systems

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Direct‐to‐cell (D2C) connectivity enables future non‐terrestrial networks to provide service directly to standard terrestrial user equipment (UE) when terrestrial networks (TN) are unavailable. In this work, the satellite system is considered as a secondary network that supplements existing TN coverage while minimizing interference to the ...
Satya Chan   +3 more
wiley   +1 more source

Independence-Monmouth Traffic Safety Management Program (TSMP)

open access: yes, 1981
Cover letter title: Independence-Monmouth Traffic Safety Management Program (TSMP).At head of title: Preliminary."July 1981.""OTSC Project #81-02-5-609."This archived document is maintained by the State Library of Oregon as part of the Oregon Documents ...

core  

SMTC Configuration and Window Adjustment Strategies for Beam Hopping in NR‐NTN

open access: yesInternational Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT Beam hopping is an effective transmission strategy for nonterrestrial networks (NTNs), enabling satellites to allocate limited power and spectrum resources across different geographical regions over time. However, in NR‐based NTN systems, beam hopping complicates synchronization monitoring because synchronization signal block (SSB) arrivals ...
Hee Wook Kim, Kyungrak Lee, Joon Gyu Ryu
wiley   +1 more source

Marine Industries Global Market Analysis [PDF]

open access: yes, 2005
This report was commissioned by the Marine Institute and completed in March 2005. Its aims are to act as an input to the strategy development process and specifically to provide the following: • An estimate of the global market for marine activities in ...
Douglas-Westwood Limited
core   +1 more source

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