Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

The Wave Nature of Light02:12

The Wave Nature of Light

60.9K
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
60.9K
Survival Tree01:19

Survival Tree

393
Survival trees are a non-parametric method used in survival analysis to model the relationship between a set of covariates and the time until an event of interest occurs, often referred to as the "time-to-event" or "survival time." This method is particularly useful when dealing with censored data, where the event has not occurred for some individuals by the end of the study period, or when the exact time of the event is unknown.
 Building a Survival Tree
Constructing a...
393
Survival Curves01:18

Survival Curves

664
Survival curves are graphical representations that depict the survival experience of a population over time, offering an intuitive way to track the proportion of individuals who remain event-free at each time point. These curves are widely used in fields such as medicine, public health, and reliability engineering to visualize and compare survival probabilities across different groups or conditions.
The Kaplan-Meier estimator is the most common method for constructing survival curves. This...
664
Introduction To Survival Analysis01:18

Introduction To Survival Analysis

761
Survival analysis is a statistical method used to study time-to-event data, where the "event" might represent outcomes like death, disease relapse, system failure, or recovery. A unique feature of survival data is censoring, which occurs when the event of interest has not been observed for some individuals during the study period. This requires specialized techniques to handle incomplete data effectively.
The primary goal of survival analysis is to estimate survival time—the time...
761
Comparing the Survival Analysis of Two or More Groups01:20

Comparing the Survival Analysis of Two or More Groups

570
Survival analysis is a cornerstone of medical research, used to evaluate the time until an event of interest occurs, such as death, disease recurrence, or recovery. Unlike standard statistical methods, survival analysis is particularly adept at handling censored data—instances where the event has not occurred for some participants by the end of the study or remains unobserved. To address these unique challenges, specialized techniques like the Kaplan-Meier estimator, log-rank test, and...
570
Truncation in Survival Analysis01:09

Truncation in Survival Analysis

589
Truncation in survival analysis refers to the exclusion of individuals or events from the dataset based on specific criteria related to the time of the event. This exclusion can happen in two primary forms: left truncation and right truncation.
Left truncation occurs when individuals who experienced the event of interest before a certain time are not included in the study. This is often due to a "delayed entry" into the study where only those who survive until a certain entry point are...
589

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

An international 20 country patient and physician survey of the usability and acceptability of Stepped Care pathway in Parkinson's disease.

Scientific reports·2025
Same author

Quantification of plasma APOE4 with a novel automated Lumipulse immunoassay enables the identification of homozygous and heterozygous APOE ε4 carrier status.

Clinica chimica acta; international journal of clinical chemistry·2025
Same author

Optical coherence tomography reveals retinal structural abnormalities in α-synucleinopathies: insights from the Padua-CESNE cohort.

Journal of neural transmission (Vienna, Austria : 1996)·2025
Same author

The role of opicapone in the management of Parkinson's disease: an Italian consensus through a combined Nominal Group Technique and Delphi approach.

European review for medical and pharmacological sciences·2023
Same author

Tolerability of non-ergot oral and transdermal dopamine agonists in younger and older Parkinson's disease patients: an European multicentre survey.

Journal of neural transmission (Vienna, Austria : 1996)·2020
Same author

The PRIAMO study: active sexual life is associated with better motor and non-motor outcomes in men with early Parkinson's disease.

European journal of neurology·2019
Same journal

Inverse FIP effect plasma in the solar atmosphere: a synthesis of current understanding and new insights from AR 11967.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Signs of sulfur fractionation under high magnetic field strength.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

First ionization potential fractionation of sulfur observed with spectral imaging of the coronal environment.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Chromospheric dynamics and turbulence regulate the solar FIP effect.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Exploring the link between wave activity in the photospheric velocity driver and the FIP bias in the solar corona.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
Same journal

Radiative hydrodynamic simulations of first ionization potential fractionation in solar flares.

Philosophical transactions. Series A, Mathematical, physical, and engineering sciences·2026
See all related articles

Related Experiment Video

Updated: Jan 20, 2026

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
10:36

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

Published on: May 20, 2018

10.1K

Wolf Rock lighthouse: past developments and future survivability under wave loading.

A C Raby1, A Antonini2, A Pappas3

  • 1School of Engineering, University of Plymouth, Drake Circus, Plymouth PL4 8AA, UK.

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
|August 20, 2019
PubMed
Summary
This summary is machine-generated.

This study examines the evolution of lighthouse design on Wolf Rock, focusing on helideck survivability against extreme wave loading. Advanced modeling predicts significant displacements and stresses, highlighting the need for robust structural integrity in heritage maritime structures.

Keywords:
lighthousesmodal testingstructural responsewave loadingwave statistics

More Related Videos

Application of Design Aspects in Uniaxial Loading Machine Development
05:23

Application of Design Aspects in Uniaxial Loading Machine Development

Published on: September 19, 2018

6.3K
Monitoring Neuronal Survival via Longitudinal Fluorescence Microscopy
07:02

Monitoring Neuronal Survival via Longitudinal Fluorescence Microscopy

Published on: January 19, 2019

6.9K

Related Experiment Videos

Last Updated: Jan 20, 2026

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction
10:36

Stress Distribution During Cold Compression of Rocks and Mineral Aggregates Using Synchrotron-based X-Ray Diffraction

Published on: May 20, 2018

10.1K
Application of Design Aspects in Uniaxial Loading Machine Development
05:23

Application of Design Aspects in Uniaxial Loading Machine Development

Published on: September 19, 2018

6.3K
Monitoring Neuronal Survival via Longitudinal Fluorescence Microscopy
07:02

Monitoring Neuronal Survival via Longitudinal Fluorescence Microscopy

Published on: January 19, 2019

6.9K

Area of Science:

  • Engineering
  • Maritime Structures
  • Coastal Engineering

Background:

  • Lighthouses on exposed rocky outcrops have historically relied on empirical design methods.
  • Previous designs often learned from structural failures due to wave loading.
  • The Wolf Rock lighthouse represents an evolution in maritime engineering on challenging coastal sites.

Purpose of the Study:

  • To chart the historical evolution of lighthouse design on Wolf Rock.
  • To analyze the design and future survivability of the helideck platform on the Wolf Rock lighthouse.
  • To assess the impact of extreme wave loading on modern lighthouse structures.

Main Methods:

  • Review of historical lighthouse construction approaches.
  • Detailed structural modeling of the lighthouse and helideck platform.
  • Experimental modal analysis for model validation.
  • Bayesian methods to determine 250-year return period wave loading for future climate scenarios.

Main Results:

  • The helideck platform's design is scrutinized for long-term survivability.
  • Structural models predict differential displacements of 0.093m (2017) and 0.115m (2067) under extreme wave loads.
  • High tension forces and plastic strain are identified as critical responses.

Conclusions:

  • The study provides insights into the structural performance of lighthouses with helidecks under extreme environmental conditions.
  • Findings are crucial for ensuring the longevity of heritage maritime structures facing increasing wave loads.
  • The research contributes to understanding environmental loading on heritage structures.