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Molecular Models02:00

Molecular Models

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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Theoretical Approaches to Psychological Disorder01:29

Theoretical Approaches to Psychological Disorder

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The development of psychological disorders, which are characterized by deviant, maladaptive, and personally distressing behaviors, has been explored through several theoretical approaches.
Biological approach
The biological approach posits that internal, organic factors are the primary causes of such disorders. This perspective emphasizes brain structure and function, genetic predispositions, and neurotransmitter imbalances. For example, schizophrenia has been associated with both genetic...
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Theoretical Foundations of Nursing Practice01:30

Theoretical Foundations of Nursing Practice

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Theories play an essential role in organizing patient care. Theories refer to a proposed or followed belief, policy, or procedure that is the basis for action. Nursing theories are knowledge-based concepts that guide nurses' actions, influence nursing education and practice, and allow nurses to care for their patients.
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Accelerators01:17

Accelerators

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Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
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Random Error01:04

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Random or indeterminate errors originate from various uncontrollable variables, such as variations in environmental conditions, instrument imperfections, or the inherent variability of the phenomena being measured. Usually, these errors cannot be predicted, estimated, or characterized because their direction and magnitude often vary in magnitude and direction even during consecutive measurements. As a result, they are difficult to eliminate. However, the aggregate effect of these errors can be...
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Random Variables01:09

Random Variables

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A random variable is a single numerical value that indicates the outcome of a procedure. The concept of random variables is fundamental to the probability theory and was introduced by a Russian mathematician, Pafnuty Chebyshev, in the mid-nineteenth century.
Uppercase letters such as X or Y denote a random variable. Lowercase letters like x or y denote the value of a random variable. If X is a random variable, then X is written in words, and x is given as a number.
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Updated: Feb 11, 2026

Analyzing Melts and Fluids from Ab Initio Molecular Dynamics Simulations with the UMD Package
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ランダム加速分子動力学シミュレーションの理論的枠組み

Yiwei Ding1, Alessia Ghidini1, Pilar Cossio2,3

  • 1Department of Biochemistry and Molecular Biology, Department of Chemistry, The University of Chicago, 5735 S Ellis Ave, Chicago, Illinois 60637, USA.

The Journal of chemical physics
|February 10, 2026
PubMed
まとめ
この要約は機械生成です。

ランダム加速分子動力学（RAMD）シミュレーションを解釈するための理論を開発し、リガンド-受容体解離時間の偏りのない推定を可能にした。この枠組みは、加速分子動力学の結果を解析するための健全な方法を提供する。

キーワード:
ランダム加速分子動力学リガンド-受容体解離分子動力学シミュレーション理論的枠組み偏りのない推定

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科学分野:

  • 計算化学
  • 生物物理学
  • 分子動力学

背景:

  • リガンド-受容体解離は遅いプロセスであり、標準的なシミュレーション方法には課題がある。
  • ランダム加速分子動力学（RAMD）のような特殊な技術は、これらのシミュレーションを加速する。
  • RAMD結果の偏りのない解析のための理論的枠組みは、現在不足している。

研究 の 目的:

  • RAMDシミュレーションを解釈するための理論的枠組みを開発すること。
  • RAMDデータから偏りのない脱出時間をアナリティカルに導出すること。
  • タンパク質-リガンド解離シミュレーションを用いて理論を検証すること。

主な方法:

  • RAMDシミュレーションを過減衰ランジュバンダイナミクスで近似すること。
  • 有効温度と拡散係数を持つSmoluchowski方程式を利用すること。
  • 自由エネルギー障壁からの偏りのない脱出時間のアナリティカルな表現を導出すること。

主要な成果:

  • RAMDモデルのダイナミクスは、修正されたSmoluchowski方程式と一致する。
  • 有効温度と拡散係数は、ランダムな力の大きさに二次関数的に依存する。
  • 偏りのない脱出時間のアナリティカルな表現を導出し、検証した。

結論:

  • 開発された理論は、RAMDシミュレーションを解釈するための健全な基盤を提供する。
  • この枠組みにより、加速分子動力学から偏りのない推定値を抽出できる。
  • このアプローチは、タンパク質-リガンド複合体の解離解析に応用できる可能性がある。