An integrated Janus hydrogel with different hydrophilicities and gradient pore structures for high-performance zinc-ion batteries
DOI: 10.1039/D4EE01018C, Paper Kaiyue Zhu, Xiling Niu, Weili Xie, Hanmiao Yang, Weikang Jiang, Manxia Ma, Weishen Yang
In zinc-ion batteries, the role of water in electrolytes is pivotal for enhancing the kinetics and capacity of the cathode; however, an excess of water leads to reduced stability of...
The content of this RSS Feed (c) The Royal Society of Chemistry
Alleviating Nanostructural Phase Impurities Enhances the Optoelectronic Properties, Device Performance and Stability of Cesium-Formamidinium Metal-Halide Perovskites
DOI: 10.1039/D4EE00901K, Paper Open Access   This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.Christian Michael Michael Wolff, Mostafa Othman, Quentin Jeangros, Daniel A. Jacobs, Moritz H. Futscher, Stefan Zeiske, Ardalan Armin, Anael Jaffres, Austin George Kuba, Dmitry Chernyshov, Sandra Jenatsch, Simon Züfle, Beat Ruhstaller, Saba Tabean, Tom Wirtz, Santhana Eswara, Jiashang Zhao, Tom J Savenije, Christophe Ballif, Aïcha Hessler-Wyser
The technique of alloying FA+ with Cs+ is often used to promote structural stabilization of the desirable α-FAPbI3 phase in halide perovskite devices. However, the precise mechanisms by which these...
The content of this RSS Feed (c) The Royal Society of Chemistry
PtAu alloying-modulated hydroxyl and substrate adsorptions for glycerol electrooxidation to C3 products
DOI: 10.1039/D4EE00485J, PaperYan Li, Xinfa Wei, Rui Pan, Yue Wang, Juanjuan Luo, Lanxin Li, Lisong Chen, Jianlin Shi
Substituting for oxygen evolution reaction with the thermodynamically favorable glycerol oxidation reaction (GOR) in water splitting offers a promising approach to produce high-value chemicals in addition to hydrogen, which, however,...
The content of this RSS Feed (c) The Royal Society of Chemistry
Unraveling interfacial compatibility of ultrahigh nickel cathode and chloride solid electrolyte for stable all-solid-state lithium battery
DOI: 10.1039/D4EE01302F, PaperFeng Li, Ye-Chao Wu, Xiao-Bin Cheng, Yihong Tan, Jin-Da Luo, Ruijun Pan, Tao Ma, Lei-Lei Lu, Xiaolei Wen, Zheng Liang, Hong-Bin Yao
All-solid-state lithium batteries (ASSLBs) combining the cost-controllable ultrahigh nickel cathode are receiving considerable attention due to their great potential for good safety under high energy density. Improving the interfacial stability...
The content of this RSS Feed (c) The Royal Society of Chemistry
Triboelectric nanogenerators exhibiting ultrahigh charge density and energy density
DOI: 10.1039/D4EE00895B, PaperXiaoru Liu, Zhihao Zhao, Yikui Gao, Yang Nan, Yuexiao Hu, Ziting Guo, Wenyan Qiao, Jing Wang, Linglin Zhou, Zhong Lin Wang, Jie Wang
Ultrahigh charge density (8.6 mC m−2) and energy density (0.808 J m−2 per cycle) are achieved in triboelectric nanogenerators by suppressing air breakdown via triboelectric polymer design.
To cite this article before page numbers are assigned, use the DOI form of citation above.
The content of this RSS Feed (c) The Royal Society of Chemistry
Thu 16 May 17:00: Teaching using a proof assistant and controlled natural language
I will report on the way I use Lean to teach first year math undergrads in Orsay. The main unusual thing is the use of a controlled natural language input syntax designed to make it easier to transfer proving skills from the computer to paper. This will also be the opportunity to take a brief look at what meta-programming in Lean looks like, and maybe inspire you to build new things using this framework.
—-
WATCH ONLINE HERE : https://www.microsoft.com/en-gb/microsoft-teams/join-a-meeting?rtc=1 Meeting ID: 370 771 279 261 Passcode: iCo7a5
- Speaker: Patrick Massot (Université Paris-Saclay and Carnegie Mellon University)
- Thursday 16 May 2024, 17:00-18:00
- Venue: Live-streamed at MR14 Centre for Mathematical Sciences.
- Series: Formalisation of mathematics with interactive theorem provers ; organiser: Anand Rao Tadipatri.
Thu 16 May 15:00: Towards identifying neglected, obsolete and abandoned IoT and OT devices
The rapid adoption of Internet of Things (IoT) and Operational Technology (OT) devices to control systems remotely has introduced significant cyber-security challenges. Attackers have compromised millions of such devices over the years, exploiting their lack of management and weak cyber-security. In this paper, we examine cyber-security issues of neglected, obsolete, and abandoned IoT and OT devices exposed to the Internet. The core of our work focuses on identifying these devices using common scanning tools to find indicators of vulnerabilities and misconfigurations. Moreover, we present an analysis of our Internet-wide scans during a period of two weeks targeting security issues in 8 IoT and OT protocols: MQTT , CoAP, XMPP , Modbus, OPC UA , RTPS, DNP3 and BACnet. We observed over 1 million addresses exposing one or more of these services, of which 675,896 appear vulnerable or misconfigured. Lastly, we examine the IP reputation of the vulnerable devices and show that 7,424 were reported at least once.
- Speaker: Ricardo Yaben, Technical University of Denmark (DTU)
- Thursday 16 May 2024, 15:00-16:00
- Venue: FW26.
- Series: Computer Laboratory Systems Research Group Seminar; organiser: Ryan Gibb.
Tue 14 May 13:10: Can International Law Stop Genocide? Investigating Whether States Have a Responsibility to Protect
Since the origin of international law, the dichotomy between state sovereignty and human rights has prioritized non-interference at the cost of millions of innocent lives. The devastating reality of the Rwandan Genocide forced states to reconsider this commitment, and prompted normative deliberations about if, when, and how to intervene in such emergencies. This catalyzed the establishment of the Responsibility to Protect (R2P), a norm which promised to end the perpetuation of mass atrocity crimes through prevention, intervention, and rebuilding. Twenty-three years after R2P ’s inception, large-scale human rights violations continue to persist in regions such as Palestine, Sudan, and the DRC , raising the question: how effective is R2P in preventing and responding to humanitarian crises? Through the assessment of R2P ’s role in Syria, Libya, Kenya, Côte d’Ivoire, and Burundi, this seminar sheds light on the strengths and weaknesses of the Responsibility to Protect in the 21st century, and international law’s ability to address mass atrocity crimes.
- Speaker: Kiran Basra
- Tuesday 14 May 2024, 13:10-14:00
- Venue: Richard King room, Darwin College.
- Series: Darwin College Humanities and Social Sciences Seminars; organiser: Dr Stefanie Ullmann.
Tue 14 May 14:00: Perfect Zero-Knowledge PCPs for #P
A probabilistically checkable proof (PCP) is a proof which can be verified by inspecting a small (usually constant) number of symbols from the proof. Informally, we say a PCP is zero-knowledge if no polynomial time algorithm with oracle access to the proof can learn anything more than the validity of the proof.
We construct a perfect zero-knowledge PCP for the language #P. Our construction is the first construction of a perfect zero-knowledge PCP for a language (believed to be) outside BPP . We achieve this result unconditionally, and don’t require any cryptographic assumptions.
Our construction relies on both algebraic and combinatorial techniques, including Reed-Muller codes and the combinatorial nullstellensatz. No background in zero knowledge will be assumed for the talk. (Joint work with Tom Gur and Nicholas Spooner: https://arxiv.org/abs/2403.11941)
- Speaker: Jack O'Connor (University of Cambridge)
- Tuesday 14 May 2024, 14:00-15:00
- Venue: Computer Laboratory, William Gates Building, Room SS03.
- Series: Algorithms and Complexity Seminar; organiser: Tom Gur.
Fri 08 Nov 13:00: Title to be confirmed
Abstract not available
- Speaker: Speaker to be confirmed
- Friday 08 November 2024, 13:00-14:00
- Venue: SS03, William Gates Building. Zoom link: https://cl-cam-ac-uk.zoom.us/j/4361570789?pwd=Nkl2T3ZLaTZwRm05bzRTOUUxY3Q4QT09&from=addon .
- Series: Energy and Environment Group, Department of CST; organiser: lyr24.
Fri 07 Jun 12:00: Title to be confirmed
Abstract not available
- Speaker: Speaker to be confirmed
- Friday 07 June 2024, 12:00-13:00
- Venue: SS03, William Gates Building. Zoom link: https://cl-cam-ac-uk.zoom.us/j/4361570789?pwd=Nkl2T3ZLaTZwRm05bzRTOUUxY3Q4QT09&from=addon .
- Series: NLIP Seminar Series; organiser: Richard Diehl Martinez.
Fri 31 May 13:00: Title to be confirmed
Abstract not available
- Speaker: Andres Arcia-Moret, AMD - former researcher at UCAM
- Friday 31 May 2024, 13:00-14:00
- Venue: GN06, William Gates Building. Zoom link: https://cl-cam-ac-uk.zoom.us/j/4361570789?pwd=Nkl2T3ZLaTZwRm05bzRTOUUxY3Q4QT09&from=addon .
- Series: Energy and Environment Group, Department of CST; organiser: lyr24.
Fri 24 May 14:00: EQUALITY-BASED FORMULATION FOR NON-SMOOTH VIBRATING SYSTEMS
A new approach is presented for the vibration of non-smooth structural systems with dry friction and unilateral contact. These nonlinearities are ubiquitous in engineering, and turbomachinery rotors are a prime example of industrial systems subject to a variety of intermittent contact and frictional occurrences. While non-smooth nonlinearities are commonly expressed as a complementarity system of equalities and inequalities, the key idea here is to formulate them as non-smooth equality-only conditions, which together with the equations of motion are then satisfied in a weak integral sense through a weighted residual formulation. The resulting algebraic nonlinear equations are solved numerically using an adapted trust region nonlinear solver and basic integral quadrature schemes. The approach is developed for one-dimensional friction, extended to two-dimensional friction and contact, and applied to the fir-tree blade attachment of a helicopter engine bladed disk. The method is shown to be compact, effective, and computationally efficient. Periodic solutions with intricate sticking, sliding and separation phases are found with a high degree of accuracy for large numbers of Fourier harmonics. Importantly, the equality-based formulation does not suffer from the typical limitations or hypotheses of existing frequency-time domain methods for non-smooth systems, such as regularization, penalization, or massless frictional interfaces.
- Speaker: Prof. Christopher Pierre, Stevens Institute of Technology
- Friday 24 May 2024, 14:00-15:00
- Venue: Department of Engineering - LT6.
- Series: Engineering - Mechanics Colloquia Research Seminars; organiser: div-c.
Thu 06 Jun 14:00: TBA
TBA
- Speaker: Chaker Larabi, Université de Poitiers
- Thursday 06 June 2024, 14:00-15:00
- Venue: SS03 - William Gates Building.
- Series: Rainbow Group Seminars; organiser: Rafal Mantiuk.
Ultrahigh voltage direct current quasi-tribovoltaic nanogenerator by switchable tribo-bias induction and deposited charge extraction
DOI: 10.1039/D4EE01067A, PaperXuemei Zhang, Dahu Ren, Huiyuan Wu, Jian Wang, Xiaochuan Li, Huake Yang, Qianying Li, Qianxi Yang, Jinrong Zhu, Yi Xi
Semiconductor-based tribovoltaic nanogenerator (TVNG) is a promising continuous direct current (DC) technology. However, the limited built-in/interfacial electric field causing unsatisfactory carrier separation/extraction efficiency produces suboptimal and erratic output voltage, becoming...
The content of this RSS Feed (c) The Royal Society of Chemistry
Wed 22 May 15:00: RNA Collaborative Seminar Series special event
Dr. Ana Tufegdžić Vidaković Ubiquitin-mediated control of RNA polymerase II at the onset of the transcription cycle
Dr. Kostas Tzelepis Therapeutic targeting of RNA and its modifications
- Speaker: Dr. Ana Tufegdžić Vidaković (MRC Laboratory of Molecular Biology, University of Cambridge), Dr. Kostas Tzelepis (Cambridge Stem Cell Institute, Jeffrey Cheah Biomedical Centre, University of Cambridge)
- Wednesday 22 May 2024, 15:00-16:00
- Venue: Online (ZOOM) - registration required https://us02web.zoom.us/webinar/register/WN_eaqHg_fsRg2TKgTXLT2Akw.
- Series: Cambridge RNA Club; organiser: .
Thu 20 Jun 17:00: Cambridge RNA Club - June session IN PERSON
Abstract not available
- Speaker: Dr. Damiano Mangoni (Italian Institute of Technology). Second speaker to be confirmed.
- Thursday 20 June 2024, 17:00-18:00
- Venue: Gurdon Institute Tea Room - RNA Club.
- Series: Cambridge RNA Club; organiser: .
Thu 23 May 17:00: Cambridge RNA Club - May session IN PERSON
Dr. Joanna Krupka (Wellcome-MRC Cambridge Stem Cell Institute, University of Cambridge) title to be confirmed
Dr. Jeremy Sanford (UC Santa Cruz, USA ) CURE-ing aberrant pre-mRNA splicing
- Speaker: Dr. Joanna Krupka (Wellcome-MRC Cambridge Stem Cell Institute, University of Cambridge) and Dr. Jeremy Sanford (UC Santa Cruz, USA)
- Thursday 23 May 2024, 17:00-18:00
- Venue: Gurdon Institute Tea Room - RNA Club.
- Series: Cambridge RNA Club; organiser: .
Wed 15 May 14:00: Changing fast and slow: Hydrographic variability along the West Antarctic Peninsula Shelf during the recent sea ice extremes
Antarctic sea ice extent has been anomalously low since 2016, and reached extreme circumpolar minima in 2022/23. The causes of this change are the subject of lively scientific debate, including the relative roles of atmospheric and ocean processes in modulating sea ice evolution. The role of the ocean is particularly challenging to address due to the lack of sustained oceanographic data under the ice. Here, we examine the ocean’s response and potential role in the extreme sea ice minima using data collected by the Palmer Long-Term Ecological Research program and BAS along the West Antarctic Peninsula (WAP). This region has undergone dramatic change during many decades, including atmospheric and deep ocean warming, glacier retreat, and sea ice loss even prior to the most recent minima. Our observations show the extreme sea ice minimum followed after sustained wind anomalies that modulate ice advection, and occurred as the upper ocean stratification that typically prevents the ventilation of warm Circumpolar Deep Water to the surface broke down. We also show that this event reverted decades of upper-ocean change along the WAP .
- Speaker: Carlos Moffat, University of Delaware
- Wednesday 15 May 2024, 14:00-15:00
- Venue: BAS Seminar Room 1; https://bas-ac-uk.zoom.us/j/91447634407.
- Series: British Antarctic Survey - Polar Oceans seminar series; organiser: Dr Birgit Rogalla.
Rapid Surface Reconstruction of In2S3 Photoanode via Flame Treatment for Enhanced Photoelectrochemical Performance
Surface reconstruction, re-organizing the surface atoms or structure, is a promising strategy to manipulate materials' electrical, electrochemical, and surface catalytic properties. Herein, we demonstrate a rapid surface reconstruction of indium sulfide (In2S3) via a high-temperature flame treatment to improve its charge collection properties. The flame process selectively transforms the In2S3 surface into a diffusionless In2O3 layer with high crystallinity. Additionally, it controllably generates bulk sulfur (S) vacancies within a few seconds, leading to surface-reconstructed In2S3 (sr-In2S3). When using those sr-In2S3 as photoanode for photoelectrochemical (PEC) water splitting devices, these dual functions of surface In2O3/bulk In2S3 reduce the charge recombination in the surface and bulk region, thus improving photocurrent density and stability. With optimized surface reconstruction, the sr-In2S3 photoanode demonstrates a significant photocurrent density of 8.5 mA/cm2 at 1.23 V versus a reversible hydrogen electrode (RHE), marking a 2.5-fold increase compared to pristine In2S3 (3.5 mA/cm2). More importantly, the sr-In2S3 photoanode exhibited an impressive photocurrent density of 7.3 mA/cm2 at 0.6 V versus RHE for iodide oxidation reaction (IOR). We also showcase a practical and scalable surface reconstruction via flame treatment. Our work provides new insights for surface reconstruction engineering in sulfide-based semiconductors, making a breakthrough in developing efficient solar-fuel energy devices.
This article is protected by copyright. All rights reserved