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Global Climate Change01:50

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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Introduction to Global Positioning System01:30

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The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
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Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
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Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
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The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
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GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
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1990 年 から 2016 年 までの 銃 で の 世界 的 死亡 率

, Mohsen Naghavi1, Laurie B Marczak1

  • 1Institute for Health Metrics and Evaluation, University of Washington, Seattle.

JAMA
|September 1, 2018
PubMed
まとめ
この要約は機械生成です。

2016年に世界中で銃による死亡者は25万1000人に達し,殺人事件が多数を占めた. 銃器による負傷による死亡率は全体的に減少したが,各国と人口層の間で大きな差異が残っており,標的を絞った予防政策の必要性を強調している.

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科学分野:

  • 世界保健
  • 流行病学
  • 公衆衛生政策

背景:

  • 銃による死亡率の理解は 効果的な予防戦略を策定する上で 極めて重要です
  • 銃による負傷による死亡の過去の推定は様々であり,更新されたグローバルなデータが必要でした.
  • 銃器の入手と所有は 死亡率に影響を与える重要な要因として認識されています

研究 の 目的:

  • 1990年から2016年までの195カ国・地域における 銃による負傷による死亡の世界の負担を推定する.
  • 銃による死亡率の動向を分析する 殺人,自殺,意図しない死を含む
  • 銃器の利用率と銃器関連死亡率との関係を調査する.

主な方法:

  • 13,812の位置年からの非特定された集約された重要な登録データを利用しました.
  • 年齢,性別,年月,場所によって分類された死亡率と死亡率の推定値.
  • 銃による自殺の比率と人当たりの銃所有率を組み合わせた 改訂されたプロキシ測定法を用いて 銃へのアクセスを評価しました

主要な成果:

  • 2016年に世界中で推定251,000 (95% UI,195,000-276,000) の銃器による負傷死亡が発生し,これは1990年の209,000から増加した.
  • 2016年の銃による死亡のほとんどは殺人 (64.0%) で,その次に自殺 (27.0%) と意図しない死亡 (9.0%) であった.
  • 世界的な銃による自殺率は毎年1.6%減少していますが,124カ国の自殺率は安定または増加しています.銃による殺人率は世界的に有意な減少を示していません. 銃器の使用率が高いと,銃器による自殺率と殺人率の増加が関連していた (R2=0.21とR2=0.35,それぞれ).

結論:

  • 1990年から2016年の間に世界中で 銃による負傷による死亡が増加し 6カ国で不釣り合いな負担が加えられました
  • 年齢を基準とした銃による死亡率が全体的に減少しているにもかかわらず,世界的に,また人口集団ごとに大きな違いがある.
  • 銃器の利用可能性と死亡率の複雑な関係を強調し, 具体的かつ証拠に基づいた予防政策の必要性を強調しています.