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Easy Or Hard? Basic Questions in Computational Complexity Theory 容易还是困难?计算复杂性理论的基本问题
Pub Date : 2024-01-25 DOI: 10.3389/frym.2023.1284284
Noa Segev, Avi Wigderson
Many things in our lives are designed to solve problems. Whether it is an app on our cellphones, the construction of a new building, or the development of a new drug, solving problems is a big motivator. Did you know that there is a fascinating type of mathematics behind many of the complex problems we face in our daily lives? This mathematics is called computational complexity theory, and it is a field of computer science. This is an active, constantly developing field that is attracting many talented young people—like you! In this article, we will describe computational complexity theory and the kinds of problems it is designed to help with. We hope that by the time you finish reading this article, you will be convinced that computational complexity theory is one of the most exciting fields of science.
我们生活中的许多事情都是为了解决问题而设计的。无论是我们手机上的应用程序、新建筑的建造,还是新药物的开发,解决问题都是一大动力。你知道吗,在我们日常生活中面临的许多复杂问题背后都有一种引人入胜的数学。这种数学被称为计算复杂性理论,是计算机科学的一个领域。这是一个活跃的、不断发展的领域,吸引着许多有才华的年轻人,比如你!在本文中,我们将介绍计算复杂性理论,以及它旨在帮助解决的各类问题。我们希望,当你读完这篇文章时,你会相信计算复杂性理论是最令人兴奋的科学领域之一。
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引用次数: 0
The Silicon Cycle in the Ocean 海洋中的硅循环
Pub Date : 2024-01-25 DOI: 10.3389/frym.2023.1178327
L. Cassarino, Rebecca A. Pickering, Zhouling Zhang, Bianca Liguori
The element silicon is everywhere! In fact, silicon is the second most abundant element in Earth’s crust. Silicon in rocks and minerals breaks down and is transported from rivers and streams into the world’s oceans. Many marine organisms need silicon as it is a crucial nutrient to build their skeletons. Silicon eventually reaches the seafloor, but its journey into the abyss is not straightforward due to biological, physical, and chemical processes. All these processes transport and transform silicon, creating a cycle that we call the marine silicon cycle. The silicon cycle is directly connected to the carbon cycle, making silicon a key player in the regulation of Earth’s climate. In this article, we discuss why we need to understand the marine silicon cycle, explain the steps that happen in the ocean, and demonstrate how the marine silicon cycle affects humans.
硅元素无处不在!事实上,硅是地壳中含量第二高的元素。岩石和矿物中的硅会分解,并从河流和溪流中进入世界海洋。许多海洋生物都需要硅,因为它是构建生物骨骼的重要养分。硅最终会到达海底,但由于生物、物理和化学过程的影响,硅的深海之旅并不平坦。所有这些过程都会对硅进行运输和转化,形成一个循环,我们称之为海洋硅循环。硅循环与碳循环直接相关,使硅成为调节地球气候的关键因素。在本文中,我们将讨论为什么我们需要了解海洋硅循环,解释在海洋中发生的步骤,并展示海洋硅循环如何影响人类。
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引用次数: 0
Watching Out for Coral Reefs With Forams 用有孔虫保护珊瑚礁
Pub Date : 2024-01-24 DOI: 10.3389/frym.2024.1122119
Elsa B Girard, Willem Renema
Lots of creatures live in coral reefs, including some tiny ones you might never have heard of. In this article, we will tell you about the importance of Foraminifera (also called forams), unicellular organisms with shells, that contribute to coral reefs in many ways. Just like corals, some forams living on the seafloor live closely together with microalgae. Some forams also thrive in similar environmental conditions (sunlight, temperature, salt) as corals. For this reason, forams can be used as reef “sensors”, to keep track of the overall health of coral reefs. They can even help to detect poor environmental conditions that might harm coral growth in the future. In this article, we will look at a study of an Indonesian reef ecosystem in which the foram communities living on the seafloor were monitored between 1997 and 2018.
珊瑚礁中生活着许多生物,包括一些你可能从未听说过的小生物。在这篇文章中,我们将告诉你有孔虫(也叫有孔类)的重要性,它们是有壳的单细胞生物,对珊瑚礁有很多贡献。就像珊瑚一样,生活在海底的一些有孔虫与微藻紧密地生活在一起。一些有孔虫还能在与珊瑚相似的环境条件(阳光、温度、盐分)下茁壮成长。因此,有孔虫可以作为珊瑚礁的 "传感器",跟踪珊瑚礁的整体健康状况。它们甚至还能帮助发现未来可能损害珊瑚生长的恶劣环境条件。在这篇文章中,我们将介绍一项对印度尼西亚珊瑚礁生态系统的研究,该研究在 1997 年至 2018 年期间对生活在海底的孔藻类群落进行了监测。
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引用次数: 0
Can Tiny Helpful Bacteria Help Us Fight Dangerous Bacteria? 微小的有益细菌能帮助我们对抗危险细菌吗?
Pub Date : 2024-01-24 DOI: 10.3389/frym.2023.1219051
G. Radocchia, S. Schippa, F. Pantanella
Antibiotics were a huge advance for the field of medicine because they decreased the risk of people getting sick due to harmful bacteria. However, bacteria quickly learned to “fight back” against these powerful medicines. Antibiotic-resistant bacteria, increasingly frequent nowadays, cannot be killed by antibiotics, making infections with these organisms very dangerous. Some common infections have become extremely difficult or even impossible to cure, leading to an alarming public health problem. In this article, we will discuss how helpful “predator bacteria” might be useful in fighting antibiotic-resistant infections. The bacterium we chose to study is called Bdellovibrio bacteriovorus, it lives in the healthy human gut and is capable of preying on other bacteria. In the future, might this bacterium be an effective treatment for dangerous bacterial infections? We think so!
抗生素是医学领域的一大进步,因为它降低了人们因有害细菌而生病的风险。然而,细菌很快就学会了 "反击 "这些强效药物。如今,抗生素耐药细菌越来越多,它们无法被抗生素杀死,使得感染这些生物变得非常危险。一些常见的感染已变得极难治愈,甚至无法治愈,导致了令人担忧的公共卫生问题。在本文中,我们将讨论有用的 "捕食细菌 "如何有助于对抗抗生素耐药性感染。我们选择研究的这种细菌叫做 "布氏嗜血杆菌"(Bdellovibrio bacteriovorus),它生活在健康的人体肠道中,能够捕食其他细菌。将来,这种细菌会成为治疗危险细菌感染的有效方法吗?我们认为可以!
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引用次数: 0
What is Alopecia? 什么是脱发?
Pub Date : 2024-01-24 DOI: 10.3389/frym.2024.1257801
Ümmügülsüm Yıldız-Altay, David S. Pilson, Jillian M. Richmond, Maryanne Senna
Alopecia is a medical term for hair-loss disorders. Hair is important for us because it impacts our appearance and how we feel about ourselves, and losing hair can be tough for our mental health. In this article, we will explain the different types of alopecia, what can cause them, and how they are treated.
脱发是脱发疾病的医学术语。头发对我们很重要,因为它影响着我们的外表和自我感觉,而脱发可能会对我们的心理健康造成严重影响。在本文中,我们将介绍不同类型的脱发、导致脱发的原因以及治疗方法。
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引用次数: 0
Saving Birds From Extinction by Discovering Their Habitats 发现鸟类栖息地,拯救濒临灭绝的鸟类
Pub Date : 2024-01-24 DOI: 10.3389/frym.2023.1210462
D. Frigerio, Sonia Kleindorfer, Julia Krejci, Richard Schuster, Kurt Kotrschal, Matthias-Claudio Loretto, Verena Puehringer-Sturmayr
With only 700 individuals left in the wild, the northern bald ibis is considered to have a moderate risk of going extinct. What does it take to prevent a species from going extinct? Aside from ensuring there is adequate habitat and making sure the species is safe, knowledge about an animal’s behavior is key for conservation management. Which sites do these birds use for foraging and roosting? Do they move alone or in groups, and are there recurring patterns to their movements? These are just some of the questions we tried to answer in our study. We monitored the movements of 32 free-flying northern bald ibises over 4 years, by equipping the birds with GPS transmitters. We found that our birds are pretty predictable in their habits and that they preferably fly along valleys. Being aware of such preferences is important when planning to reintroduce new colonies into the wild.
北秃头朱鹭在野外仅存 700 只,被认为有中度灭绝风险。如何防止物种灭绝?除了确保有足够的栖息地和确保物种安全外,了解动物的行为也是保护管理的关键。这些鸟类在哪些地方觅食和栖息?它们是单独活动还是成群活动?这些只是我们在研究中试图回答的一些问题。我们给 32 只自由飞翔的北方朱鹭安装了 GPS 发射器,对它们的行动进行了长达 4 年的监测。我们发现,这些鸟的习性非常容易预测,而且它们更喜欢沿着山谷飞行。在计划将新的秃头朱鹭群落重新引入野外时,了解它们的这种喜好非常重要。
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引用次数: 0
Underwater Flashlights: What Light Can Tell Us About Water Quality 水下手电筒:光能告诉我们什么是水质
Pub Date : 2024-01-23 DOI: 10.3389/frym.2023.1201556
Kevin A. Ryan, Douglas A. Burns
Water is essential for life. The particles and dissolved chemicals found in rivers, lakes, and oceans are constantly changing with weather, seasons, and human activities. The substances found in water can be helpful or harmful to humans and other organisms. New technologies allow scientists to use waterproof computers (called sensors) to record the quality of water as it changes throughout the day or night. Many sensors use the interaction of water with light, or other energy forms, to learn about what is in it. Through observing what happens to light energy in water, scientists can reveal the sources and movements of harmful pollutants or essential nutrients for plants, animals, and bacteria. Networks containing many sensors work together to provide continuous information about the ever-changing conditions that affect all living organisms that depend on water.
水是生命之源。河流、湖泊和海洋中的微粒和溶解的化学物质随着天气、季节和人类活动而不断变化。水中的物质可能对人类和其他生物有益,也可能有害。利用新技术,科学家们可以使用防水计算机(称为传感器)来记录水质在白天或夜晚的变化。许多传感器利用水与光或其他能量形式的相互作用来了解水中的物质。通过观察光能在水中的变化,科学家可以揭示有害污染物或植物、动物和细菌必需营养物质的来源和移动。包含许多传感器的网络协同工作,不断提供有关不断变化的条件的信息,这些条件影响着所有依赖于水的生物。
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引用次数: 0
Why Is the Baby Sunbathing? An Overview of Jaundice 宝宝为什么晒太阳?黄疸概述
Pub Date : 2024-01-22 DOI: 10.3389/frym.2023.1208907
Megha Bhatia, Sasha Kadamba, Rose Angeline De Guia, Hiba Ansari, Nico Osier
Have you ever seen a small baby with yellow skin or eyes? These babies have a skin condition called jaundice and it is actually pretty common. Jaundice occurs when too much of a waste substance called bilirubin stays in the blood for too long. Bilirubin is produced when red blood cells naturally break down and, in high amounts, it can cause damage to the body. The most common way doctors identify jaundice is the finger test: gently touching the baby’s skin with their finger to look for any yellowing. If the baby does have jaundice, there are two main treatments: ultraviolet (UV) light therapy and exchange transfusion therapy. Both work by bringing bilirubin in the blood down to normal levels.
您见过皮肤或眼睛发黄的小婴儿吗?这些婴儿患有一种叫做黄疸的皮肤病,而且这种病其实很常见。当一种名为胆红素的废物在血液中停留时间过长时,就会出现黄疸。胆红素是红细胞自然分解时产生的,如果含量过高,就会对身体造成损害。医生鉴别黄疸最常用的方法是手指试验:用手指轻轻触摸宝宝的皮肤,观察是否有黄染。如果宝宝确实有黄疸,主要有两种治疗方法:紫外线(UV)疗法和交换性输血疗法。这两种疗法都能使血液中的胆红素降至正常水平。
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引用次数: 0
Our Blue Planet: Connecting Humans and the Ocean 我们的蓝色星球连接人类与海洋
Pub Date : 2024-01-22 DOI: 10.3389/frym.2023.1076771
Michael Kriegl, Sophia Kochalski, Tanja M. Straka, Philipp Gorris, Achim Schlüter, L. C. Kluger
Dive into the incredible world of the ocean, a place full of wonder and beauty! The ocean is like a superhero, providing us with tasty seafood and other vital “services”. But trouble looms: climate change, plastic pollution, and intensive fishing endanger the ocean’s superpowers. Your help is needed to save the day! To keep the ocean healthy, we must understand how it works. Get ready to explore its mysteries through gigantic “webs” of interactions that reveal how we are connected to the ocean, how our actions impact the environment, and how the environment affects us. These webs are called social-ecological networks, and they are like maps that help us solve the ocean’s problems. Together, we can use social-ecological networks to secure a sustainable future for our blue planet. So, put on your diving mask, grab your snorkel, and let us make a splash for the ocean!
潜入不可思议的海洋世界,一个充满神奇和美丽的地方!海洋就像一个超级英雄,为我们提供美味的海鲜和其他重要的 "服务"。但是,麻烦也随之而来:气候变化、塑料污染和密集的捕鱼活动威胁着海洋的超能力。拯救海洋需要您的帮助!为了保持海洋的健康,我们必须了解它是如何工作的。准备好通过巨大的互动 "网 "来探索海洋的奥秘吧!这些互动 "网 "揭示了我们如何与海洋相连,我们的行为如何影响环境,以及环境如何影响我们。这些网络被称为社会生态网络,它们就像帮助我们解决海洋问题的地图。通过共同努力,我们可以利用社会生态网络为我们的蓝色星球创造一个可持续发展的未来。因此,戴上你的潜水面罩,拿上你的呼吸管,让我们为海洋出一份力!
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引用次数: 0
Blowing in the Wind: Microbial Transport in the Atmosphere 随风飘荡:大气中的微生物迁移
Pub Date : 2024-01-22 DOI: 10.3389/frym.2023.1172757
E. Rahav, B. Herut, Adina Paytan
Airborne microbes are microorganisms that are suspended in the air. Airborne microbes include bacteria, viruses, fungi, and other microorganisms. Some airborne microbes can cause infectious diseases or other health problems, while others may not be harmful. Therefore, the role of airborne microbes in shaping atmospheric, ocean, and land-based ecosystems is extremely important. Scientists found that airborne microbes can be transported by wind/air for thousands of kilometers away from their place of origin. This atmospheric transport is fast and spreads microbial cells across geographic barriers. It only takes days for them to cross continents and oceans, for example. In this article, we will explain which microbes are found in the air, where they come from, and the atmospheric factors that affect them.
空气传播微生物是指悬浮在空气中的微生物。空气中的微生物包括细菌、病毒、真菌和其他微生物。一些空气中的微生物会导致传染病或其他健康问题,而其他微生物则可能无害。因此,空气中的微生物在塑造大气、海洋和陆地生态系统方面的作用极为重要。科学家发现,空气传播的微生物可以通过风/空气传播到远离其原产地数千公里的地方。这种大气迁移速度极快,可以跨越地理障碍传播微生物细胞。例如,只需几天时间,它们就能穿越大陆和海洋。在本文中,我们将解释空气中存在哪些微生物,它们来自哪里,以及影响它们的大气因素。
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引用次数: 0
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Frontiers for young minds
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