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関連する概念動画

Motion of a Projectile01:23

Motion of a Projectile

1.1K
Projectile motion becomes evident when a player kicks the ball into the air. The launch angle, or the angle at which the ball is kicked, plays a crucial role in determining the trajectory of the projectile. As the ball soars through the air, influenced solely by gravity, its motion can be dissected into two independent velocity components: the horizontal and the vertical.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
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Projectile Motion01:20

Projectile Motion

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An object thrown in the air follows a parabolic path under the influence of Earth's gravitational force. The motion of such an object is called projectile motion, and the object itself a projectile. The parabolic path followed by the projectile is called the trajectory. Some common examples of projectile motion are the launching of fireworks, a golf ball in the air, meteors entering the Earth's atmosphere, and the firing of bullets.
When an object falls under gravity and has no...
15.8K
Projectile Motion: Example01:18

Projectile Motion: Example

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The theory of projectile motion is very useful for players of several sports to improve their performance. For example, a javelin thrower needs to throw their javelin in such a way that it travels as far as possible. The javelin thrower takes a short run-up to increase the initial speed of the javelin. The range of a projectile is at its maximum at a 45° angle so javelin throwers try to angle their throw as close to 45° as possible.
When we speak of the range (R) of a projectile on...
9.9K
Targets for Drug Action: Overview01:26

Targets for Drug Action: Overview

7.2K
Drugs target macromolecules to modify ongoing cellular processes. Primary drug targets include receptors, ion channels, transporters, and enzymes.
Receptors are either membrane-spanning or intracellular proteins, which upon binding a ligand, get activated and transmit the signal downstream to elicit a response. Drugs bind receptors, either mimicking the action of endogenous ligands or blocking the receptor activity to bring about a modified response. Nearly 35% of approved drugs target the G...
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Targeted Cancer Therapies02:57

Targeted Cancer Therapies

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The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
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Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

260
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
260

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Updated: Aug 28, 2025

An Emerging Target Paradigm to Evoke Fast Visuomotor Responses on Human Upper Limb Muscles
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移動する標的

Kai Kupferschmidt

    Science (New York, N.Y.)
    |September 15, 2022
    PubMed
    まとめ
    この要約は機械生成です。

    世界的な猿の流行は ウイルスが人間に進化する ユニークな機会を与えてくれます 科学者はこれらの適応がより重症で感染しやすいウイルスに 繋がるかどうかを調査しています

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    科学分野:

    • ウイルス学
    • 流行病学
    • 公衆衛生

    背景:

    • 2022年の世界的なモポックス (monkeypox) 流行は,重要な流行病学的変化を示した.
    • ウイルスの人間から人間への感染は 新種の進化的圧力をもたらします

    研究 の 目的:

    • モポックスウイルスのヒト宿主への適応の可能性を評価する.
    • ウイルスの伝染性や毒性に影響を与えるかもしれない遺伝的変化を特定する.

    主な方法:

    • 世界的なアウトブレイクから分離されたモポックスウイルスのゲノム監視.
    • 進化のサインを検出するためのウイルスゲノムの比較分析
    • 変異の影響を予測するシリコンモデルです

    主要な成果:

    • 新しい証拠によると 特定の変異がモポックスウイルスの ゲノムに蓄積されています
    • これらの遺伝的変化は,ヒトからヒトへの感染効率の向上と相関する可能性があります.
    • これらの変異の機能的影響を確認するには,さらなる研究が必要です.

    結論:

    • 進行中のmopoxの流行は ウイルスの適応に重要な窓を提供する.
    • 継続的なゲノムモニタリングは,mopoxウイルスの行動の潜在的な変化を追跡するために不可欠です.
    • ウイルスの進化を理解することは,公衆衛生戦略とパンデミックへの準備を伝えるための鍵です.