Core Viewpoint - The development of the first N-type thermoelectric elastomer, termed "thermoelectric rubber," by Professor Liu Kai from Qingdao University of Science and Technology, offers a new solution for energy harvesting technologies in flexible electronics and wearable devices [1]. Group 1: Material Innovation - Traditional thermoelectric devices primarily utilize inorganic thermoelectric materials, which are rigid and lack elasticity and shape adaptability, limiting their application in wearable devices [1]. - The N-type thermoelectric elastomer combines elasticity, stretchability, and thermoelectric conversion capabilities, paving the way for advancements in energy harvesting for wearable technology [1]. - The elastomer exhibits remarkable tensile strain of up to 850%, comparable to traditional rubber, and achieves a thermoelectric figure of merit (ZT) of 0.49 at 300 Kelvin, nearing or surpassing the performance of existing flexible or plastic inorganic thermoelectric materials [1]. Group 2: Device Application - Researchers have manufactured the first elastic thermoelectric generator, which differs from inorganic thermoelectric devices by eliminating the need for complex interconnection structures, allowing direct adaptation to the skin surface [2]. - This device maintains a high fill factor and low thermal resistance while demonstrating efficient thermoelectric conversion efficiency and excellent comfort and shape adaptability, showcasing its potential to power wearable electronic devices and biosensors [2].

Core Insights - China's transportation sector has achieved historic milestones during the "14th Five-Year Plan" period, with significant advancements in high-speed rail, highways, and logistics, showcasing the country's technological innovation capabilities [4][11]. Group 1: High-Speed Rail Developments - The CR450 train set a world record with a test speed of 453 km/h and a commercial operation speed of 400 km/h, marking a significant achievement in high-speed rail technology [6]. - The high-speed rail network has expanded to 48,000 kilometers, covering 97% of cities with populations over 500,000, with the "eight vertical and eight horizontal" network achieving 81.5% completion [5][7]. - The opening of the Chongqing to Qianjiang section of the Yuxia high-speed rail has ended the historical lack of high-speed rail in southeastern Chongqing [5]. Group 2: Major Infrastructure Projects - The Shenzhen-Zhongshan Link, a super-large transportation project, has created multiple world records and significantly improved connectivity in the Guangdong-Hong Kong-Macao Greater Bay Area [9]. - The Tian Shan Victory Tunnel, the world's longest highway tunnel, will reduce travel time across the Tian Shan mountains from 3 hours to 20 minutes, showcasing advancements in domestic engineering technology [10]. Group 3: Green Transportation Initiatives - The first domestic dual-fuel (methanol + diesel) vessel has successfully completed its first green methanol refueling, marking a key step in the green transformation of China's shipping industry [12]. - The first zero-carbon highway in China, spanning 161.9 kilometers, utilizes solar panels and innovative energy management technologies to achieve net-zero emissions during operation, with an annual carbon reduction of 61,000 tons [12]. - China has built 33 green highway demonstration projects and achieved nearly 100% coverage of shore power at ports, contributing to global sustainable transportation efforts [13].

Core Insights - A research team from the University of Pennsylvania has utilized artificial intelligence (AI) to identify previously unknown antibacterial compounds from ancient microorganisms, specifically archaea, which have survived in extreme environments for billions of years [2][3] - The study highlights the potential of archaea as a novel molecular resource for antibiotic development, with compounds that may operate through mechanisms different from existing drugs [2] - The upgraded APEX tool was employed to predict which peptides from archaea could inhibit bacterial growth, resulting in the identification of over 12,000 candidate molecules from 233 archaea proteins [2] Summary by Sections - **Research Methodology** - The APEX AI model was retrained using thousands of additional peptides and information on pathogenic bacteria to enhance its predictive capabilities [2] - The team screened 233 archaea proteins and identified over 12,000 candidate molecules, which were found to differ from known antibacterial peptides, particularly in charge distribution [2] - **Experimental Results** - Out of the selected 80 candidate molecules, 93% showed effectiveness against at least one type of drug-resistant pathogen [3] - In animal tests, one of the three compounds demonstrated an ability to inhibit drug-resistant bacteria comparable to the commonly used last-resort antibiotic, polymyxin B [3] - Unlike most antibacterial peptides that disrupt bacterial outer membranes, these candidates appear to "cut off the power" from within the bacteria, disrupting their life-sustaining electrical signals [3]

Group 1 - The core point of the news is the successful application of the special steel Q690C, developed by Baogang Co., in the construction of the Haitai Yangtze River Tunnel, marking a significant advancement in high-end special steel materials [1][2] - Baogang Co. provided all the steel for the tunnel's embedded components, which are crucial for the foundation support and overall structural strength of large engineering projects [1] - The Q690C material is innovative as it replaces traditional carbon steel or low-alloy steel, meeting high performance requirements such as low-temperature toughness, high strength, fatigue resistance, impact resistance, corrosion resistance, and weldability [1] Group 2 - In response to the challenging order, Baogang Co. initiated a collaborative mechanism involving multiple units, including the technology center and steelmaking plant, to optimize the composition design and production process [2] - The company successfully rolled out over 3,000 tons of Q690C special steel after extensive verification of heat treatment processes [2] - The successful application of Q690C in the Haitai Yangtze River Tunnel not only signifies a major breakthrough for Baogang Co. in the high-end special steel sector but also highlights its technical strength and commitment to supporting national major projects [2]

回想起两年前毕业找工作碰壁的那个夏天，李凯旋仍然无法释怀。 李凯旋博士阶段攻读的是中西医结合专业，当时非常想去一家公立三甲综合医院（以下简称"西医 院"），该院外科主任也想接收中西医结合方面的人才，觉得他很合适。但遗憾的是，李凯旋并未拿到 录用函，最终进入一家公立三甲中医类医院（以下简称"中医院"）工作。 "中西医结合方向听起来'左右逢源'，找工作时却很容易陷入'两边都不待见'的窘境。"李凯旋告诉 科技日报记者，因名额紧张、手续烦琐，该方向医师很难进入西医院的西医科室。 李凯旋遭遇的只是中西医结合医学从业者面临的困境之一。记者在采访中发现，高层次人才匮乏、 中西医理论"结而不合"、无专属竞争赛道等诸多问题正成为中西医结合发展的卡点痛点。 强化研究生教育， 填补高层次人才缺口 新冠疫情肆虐之时，全世界的抗疫效果不尽人意，而我国做到低感染率、低死亡率。这其中，我国 独有的中西医结合医学立下汗马功劳。 当前，中西医结合医学依然在其优势领域发光发热。 今年4月，一位60多岁的乳腺癌患者因化疗联合免疫治疗引发全身剥脱性皮炎，严重的继发性感染 危及生命。其就诊的肿瘤医院束手无策，当即下了病危通知书。随后，家属将患者转至中 ...

Core Insights - A research team led by Rice University has achieved the strongest phonon interference effect to date in silicon carbide systems, known as "Fano resonance," with an intensity two orders of magnitude higher than previous studies [1] - This phonon-based technology is expected to advance molecular-level sensing technology and open new application pathways in energy harvesting, thermal management, and quantum computing [1] Group 1 - The interference phenomenon, akin to ripples in a pond, enhances or cancels out various waves such as light, sound, and atomic vibrations, providing power for high-precision sensors and potential applications in quantum computing [1] - The breakthrough relies on constructing a two-dimensional metallic interface on a silicon carbide substrate, embedding several layers of silver atoms between graphene and silicon carbide, significantly enhancing the interference effect of different vibration modes [1] Group 2 - The team utilized Raman spectroscopy to study phonon interference, revealing highly asymmetric line shapes in the spectra, with some cases showing complete "valleys," indicative of strong interference and unique anti-resonance patterns [2] - The interference sensitivity is high enough to detect single molecules without chemical labels, making the device simple and scalable, with potential applications in quantum sensing and next-generation molecular detection [2] - Low-temperature experiments confirmed that this effect is entirely due to phonon interactions rather than electronic effects, with this "pure phonon" quantum interference being rare and only occurring in specific two-dimensional metal/silicon carbide systems [2]

Core Points - The article highlights significant achievements in China's transportation sector during the "14th Five-Year Plan" period, emphasizing technological advancements and infrastructure development [4][10] - It discusses the integration of new technologies such as digital economy, artificial intelligence, and smart logistics into the transportation industry, aiming for enhanced efficiency and connectivity [4][3] - The article showcases specific projects like the CR450 high-speed train and the Shenzhen-Zhongshan Link, which have set world records and improved transportation efficiency [6][8] Group 1: Transportation Infrastructure Achievements - The completion of the Shenzhen-Zhongshan Link, a major engineering project, has created multiple world records and significantly improved travel time across the Pearl River Delta [8] - The CR450 high-speed train, capable of reaching speeds of 450 km/h, represents a breakthrough in high-speed rail technology, marking China's leadership in this field [6][7] - By the end of 2024, over one-third of provinces in China will have high-speed rail connections, with a record of over 23 million passengers transported in a single day [7][4] Group 2: Technological Innovations - The article emphasizes the importance of autonomous innovation in achieving breakthroughs in high-speed rail technology, with a focus on overcoming geological challenges [7][6] - The development of the world's longest highway tunnel, the Tianshan Victory Tunnel, showcases China's engineering capabilities and commitment to infrastructure improvement [9] - The introduction of green transportation solutions, such as the first domestic dual-fuel ship and zero-carbon highways, reflects China's commitment to sustainable development in the transportation sector [11][12] Group 3: Future Directions - The article outlines plans for further integration of smart technologies and green initiatives in transportation, aiming to enhance efficiency and reduce carbon emissions [12][11] - The transportation sector is expected to play a crucial role in supporting China's broader goals of modernization and national rejuvenation, with a focus on safety, intelligence, and sustainability [12][4] - The commitment to maintaining technological leadership through independent innovation is emphasized as essential for future advancements in the transportation industry [10][6]

Core Viewpoint - The construction of the Kangding (Kang) - Xinduqiao (Xin) Expressway faces significant geological challenges, including frozen ground, rock piles, and water-rich fault zones, which complicate the tunneling process [1][3]. Group 1: Geological Challenges - The Kangding Tunnel's surrounding rock is primarily medium-weathered granite, characterized by a fragmented structure and poor integrity, leading to a high risk of collapse during excavation [1]. - The Gongbuka Tunnel features heavily weathered granite with frequent geological changes and a high risk of collapse due to continuous groundwater erosion [1]. - The inflow of groundwater at the tunnel entrance can reach a peak of 140 cubic meters per hour, significantly compromising the stability of the surrounding rock [1]. Group 2: Construction Techniques - The project team employs a series of scientific and effective technical solutions, including the three-step method and principles of "advanced management, short advance, strong support, and frequent measurement" to ensure safety [3]. - Dynamic management and design are emphasized, with strict adherence to advanced horizontal drilling and geological survey methods to monitor the surrounding rock conditions [3]. - As of now, both the Kangding and Gongbuka tunnels have successfully navigated two major geological risk sections, with water inflow controlled within 70% of the design value [3]. Group 3: Project Significance - The Kangxin Expressway spans approximately 80 kilometers, with a bridge-tunnel ratio of 65.9%, enhancing transportation links between the Kangba region and the Chengdu Plain [3]. - The project is expected to provide robust support for highland railway construction and significantly boost the economic, social, and cultural development along the route [3].

Core Viewpoint - The TETRA encryption standard, widely used for secure communication in various sectors, has been found to have vulnerabilities that could compromise sensitive data transmission [1][2][3]. Group 1: TETRA Standard Overview - TETRA, established by the European Telecommunications Standards Institute in 1995, includes four encryption algorithms (TEA1, TEA2, TEA3, TEA4) that can be selected based on user needs [2][3]. - The algorithms are designed to use an 80-bit key, which is considered secure, but the long-term secrecy of these algorithms has been compromised [2][3]. Group 2: Vulnerabilities Discovered - The Midnight Blue research team identified a "backdoor" in the TEA1 algorithm, allowing a key length reduction to 32 bits, which can be cracked in under a minute using a standard laptop [2][3]. - The vulnerabilities extend to an end-to-end encryption system endorsed by the European Telecommunications Standards Institute, which also has similar weaknesses [1][4]. Group 3: Implications for Users - Users of TETRA and its end-to-end encryption systems may be unaware of the vulnerabilities, potentially leading to significant security risks [1][5]. - The research indicates that the end-to-end encryption may allow manufacturers to choose key lengths, which could result in users receiving weaker security than expected [5].

受蝙蝠、鲸鱼等生物利用声波交流导航的启发，美国宾夕法尼亚州立大学与德国慕尼黑大学科学家联 手，在12日出版的《物理评论X》杂志上发表重要研究成果：配备简易声学设备的个体微型机器人，能 通过声波协调形成具有环境适应能力的智能集群，其自组织行为堪比鸟群或鱼群。 研究团队首次证实声波可作为微型机器人的控制媒介。这些理论模型中的机器人仅配备微型麦克风、扬 声器、振荡器和电机等基础元件，却展现出惊人的群体智慧。每个个体都会自动将振荡器频率与群体声 场同步，并向最强声源靠拢。 研究团队从未预料到如此简单的设计能产生这般精妙的集体行为。相较于活性物质依赖化学信号的传统 控制方式，声波通信具有显著优势：传播更快更远、能量损耗极低，且系统设计更为简洁。 虽然当前研究仍停留在计算机模拟阶段，但研究团队确信，任何遵循该设计的实体机器人群体都将呈现 相同的智能特征。这种声控微型机器人集群能在狭小空间灵活导航、形态受损后可自主重组，且具备环 境集体感知功能。 这些特性使机器人集群能在灾后环境勘探、污染物清理、靶向药物输送，以及环境监测等多个应用场景 中大显身手。而且，即使个别机器人损坏，集群仍能保持整体功能，这种自我修复特性对传感器网 ...