Waves are disturbances that transfer energy through a medium. They are caused by vibrations in the medium and can be transverse, longitudinal, or a combination. Key properties of waves include amplitude, wavelength, frequency, and speed. Waves interact with each other and surfaces through reflection, refraction, diffraction, interference, and can form standing waves through the combination of incoming and reflected waves.
Waves (Grade 7, Quarter 3) Suggested Guide for DiscussionRachel Espino
A suggested powerpoint presentation guide for discussion for Gr.7 teachers on the characteristics and categories of waves. It also includes a simple quiz (under knowledge category) as an assessment
Waves (Grade 7, Quarter 3) Suggested Guide for DiscussionRachel Espino
A suggested powerpoint presentation guide for discussion for Gr.7 teachers on the characteristics and categories of waves. It also includes a simple quiz (under knowledge category) as an assessment
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
The increased availability of biomedical data, particularly in the public domain, offers the opportunity to better understand human health and to develop effective therapeutics for a wide range of unmet medical needs. However, data scientists remain stymied by the fact that data remain hard to find and to productively reuse because data and their metadata i) are wholly inaccessible, ii) are in non-standard or incompatible representations, iii) do not conform to community standards, and iv) have unclear or highly restricted terms and conditions that preclude legitimate reuse. These limitations require a rethink on data can be made machine and AI-ready - the key motivation behind the FAIR Guiding Principles. Concurrently, while recent efforts have explored the use of deep learning to fuse disparate data into predictive models for a wide range of biomedical applications, these models often fail even when the correct answer is already known, and fail to explain individual predictions in terms that data scientists can appreciate. These limitations suggest that new methods to produce practical artificial intelligence are still needed.
In this talk, I will discuss our work in (1) building an integrative knowledge infrastructure to prepare FAIR and "AI-ready" data and services along with (2) neurosymbolic AI methods to improve the quality of predictions and to generate plausible explanations. Attention is given to standards, platforms, and methods to wrangle knowledge into simple, but effective semantic and latent representations, and to make these available into standards-compliant and discoverable interfaces that can be used in model building, validation, and explanation. Our work, and those of others in the field, creates a baseline for building trustworthy and easy to deploy AI models in biomedicine.
Bio
Dr. Michel Dumontier is the Distinguished Professor of Data Science at Maastricht University, founder and executive director of the Institute of Data Science, and co-founder of the FAIR (Findable, Accessible, Interoperable and Reusable) data principles. His research explores socio-technological approaches for responsible discovery science, which includes collaborative multi-modal knowledge graphs, privacy-preserving distributed data mining, and AI methods for drug discovery and personalized medicine. His work is supported through the Dutch National Research Agenda, the Netherlands Organisation for Scientific Research, Horizon Europe, the European Open Science Cloud, the US National Institutes of Health, and a Marie-Curie Innovative Training Network. He is the editor-in-chief for the journal Data Science and is internationally recognized for his contributions in bioinformatics, biomedical informatics, and semantic technologies including ontologies and linked data.
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
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Thanks...!
Richard's entangled aventures in wonderlandRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
2. Wave
Definition: A disturbance that transfers
energy from place to place.
What carries waves? A medium, a
medium is the material through which a
wave travels.
A medium can be a gas, liquid, or solid.
3. Not all waves require a
medium to travel.
Light from the sun travels through
empty space.
4. What causes waves?
Waves are created
when a source of
energy causes a
medium to vibrate.
A vibration is a
repeated back and
forth or up and down
motion.
5. Types of waves: Waves are
classified according to how
they move.
6. Transverse wave
Waves that move the
medium at right angles
to the direction in which
the waves are traveling
is called a transverse
wave.
Transverse means
across.The highest
parts are called crests
the lowest parts are
called troughs.
8. Longitudinal wave
The parts,where the
coils are close
together are called
compressions, the
parts where the coils
are spread out are
called rarefactions.
9. Combinations of waves
Surface waves are a
combination of
transverse and
longitudinal
waves.The waves
occur at the surface
between water and
air.
12. Amplitude
Amplitude is the maximum distance the particles of the
medium carrying the wave move away from their rest
positions.
The farther the medium moves as it vibrates the larger the
amplitude of the resulting waves. The greater the
amplitude the greater the amount of energy
13. Amplitude of transverse
waves
The amplitude of a transverse wave is
the maximum distance the medium
moves up or down from its rest position.
You can find the amplitude of a
transverse wave by measuring the
distance from rest to crest or rest to
trough.
14. Amplitude of a longitudinal
wave.
The amplitude of a longitudinal wave is
a measure of how compressed or
rarefied the medium becomes.
15. Wavelength
A wave travels a certain distance before
it starts to repeat. The distance
between two corresponding parts of a
wave is its wavelength.
Transverse measure from crest to crest
or trough to trough.
Longitudinal measure from one
compression to the next.
16. Frequency
The number of complete waves that
pass a given point in a certain amount
of time.
AKA number of vibrations per second.
Frequency measured in hertz (Hz).
17. Speed
The speed, wavelength, and frequency
of a wave are related to each other by a
mathematical formula.
Speed = wavelength x frequency
Frequency = speed/wavelength
Wavelength = speed/frequency
18. Speed
Waves in different
mediums travel at
different speeds.
However, in a given
medium and under
the same conditions
the speed of the
wave is constant.
23. Refraction is when a wave
moves from one medium into
another medium at an angle, it
changes speed as it enters
the second medium which
causes it to bend. The
bending of waves due to a
change in speed is called
refraction.
24. Refraction
Though all waves
change speed when
they enter a new
medium. Bending
occurs when one
side of the wave
enters the new
medium before the
other side
25. Diffraction
When a wave passes a barrier or
moves through a hole in a barrier it
bends and spreads out.
27. Standing waves:
If the incoming wave and the reflected
wave combine at the right places the
combined wave appears to be standing
still.
It appears to be standing in one place,
even though it is two waves interfering
as they pass through each other.
28.
29. Nodes and Antinodes
Nodes: at certain
points, destructive
interference causes
the two waves to
combine and
produce an
amplitude of zero.
Antinodes are the
points of maximum
energy. The crests
and troughs of a
standing wave.
