Results 71 to 80 of about 25,609 (318)

Stabbing Pairwise Intersecting Disks by Four Points [PDF]

arXiv, 2018
In their seminal work, Danzer (1956, 1986) and Stach\'{o} (1981) established that every set of pairwise intersecting disks in the plane can be stabbed by four points. However, both these proofs are non-constructive, at least in the sense that they do not seem to imply an efficient algorithm for finding the stabbing points, given such a set of disks $D$.
arxiv  

Hydrogel‐Based Photothermal‐Catalytic Membrane for Efficient Cogeneration of Freshwater and Hydrogen in Membrane Distillation System

Advanced Functional Materials, EarlyView.
This work presents an overview of the PTC‐VMD system for water‐hydrogen co‐generation. a) Illustration of the hydrogel‐based PTC membrane and the co‐generation of water and hydrogen. b) Structure of the PTC‐VMD system and the functions of each component layer.
Jiawei Sun, Muhammad Usman Farid, Wenlong Xi, Gang Lu, Min Wei Boey, Sai Kishore Ravi, Patrick H.‐L. Sit, Alicia Kyoungjin An   +7 more
wiley   +1 more source

Traumatic Left Anterior Descending Coronary Artery-Right Ventricle Fistula: A Case Report

Journal of Tehran University Heart Center, 2011
Traumatic coronary artery-cameral fistulas (TCAF) are rare and may present secondary to penetrating injuries (80%) or iatrogenic traumas. Early operative intervention remains the recommended treatment modality for accidental traumatic coronary artery ...
Mohammad Ali Sheikhi, Mehdi Asgari, Mehdi Dehghani Firouzabadi, Mohammad Reza Zeraati, Alireza Rezaee   +4 more
doaj  

Stab injury to the spine with retained knife blade and aortic injury: A case report and review of the literature

Indian Spine Journal
Nonmissile penetrating spine injuries are relatively common in developing countries. Associated injuries are most commonly pneumothoraxes or bowel injuries and rarely vascular injuries.
Denver Naicker, Rudo Pswaryi
doaj   +1 more source

Hydrogel with high toughness and strength for fabricating high performance stab-resistant aramid composite fabric

Journal of Materials Research and Technology, 2021
In order to prepare a new high-performance and flexibility stab-resistant composite material, one type of high-toughness and high-strength hydrogel is combined with aramid fabric.
Xiayun Zhang, Ting-Ting Li, Yuxiao Wang, Bing-Chiuan Shiu, Hao-Kai Peng, Ching-Wen Lou, Jia-Horng Lin   +6 more
doaj  

Material Composition Gradient Controls the Autonomous Opening of Banksia Seed Pods in Fire‐Prone Habitats

Advanced Functional Materials, EarlyView.
The seed pod valves of Australian Banksia attenuata plants are not simply bi‐layers which bend when dry. These experiments and models reveal complex mechanics, which allow seed release only after several steps of seed pod opening. Stiffness gradients prevent delamination of the valves during loading, and a shape‐memory function protects the seeds ...
Friedrich Reppe, Lorenzo Guiducci, Rivka Elbaum, Peter Werner, John W. C. Dunlop, David J. Merritt, Peter Fratzl, Michaela Eder   +7 more
wiley   +1 more source

Investigation of impact performance of 3-dimensional interlock polymer fabrics in double and multi-angle pass stabbing

Materials & Design, 2021
This paper presents the influence of fabric structures and stab angles on single-pass stab impact and the repeated and multi-angle stabbings of 3-dimensional (3D) warp interlock structural fabrics based on the high-molecular-weight polyethylene (HMWPE ...
Mengru Li, Peng Wang, François Boussu, Damien Soulat   +3 more
doaj  

Non-fatal suicide attempt by intentional stab wound: Clinical management, psychiatric assessment, and multidisciplinary considerations

Journal of Emergencies, Trauma and Shock, 2012
Background: Suicide by means of self-inflicted stab wounds is relatively uncommon and little is known about this population and their management. Materials and Methods: Retrospective review of adult trauma patients admitted to our Level-1 trauma center ...
James M Badger, Shea C Gregg, Charles A Adams   +2 more
doaj   +1 more source

Making Photoresponsive Metal–Organic Frameworks an Effective Class of Heterogeneous Photocatalyst

Advanced Functional Materials, EarlyView.
This review summarizes photoresponsive MOFs for photocatalytic applications, focusing on their capacity to enhance light harvesting, charge transfer, and surface reactions. While existing studies provide foundational insights, emerging characterization techniques enable a deeper understanding of photoresponsive MOFs.
Rui Liu, Hao Wu, Hoi Ying Chung, Yun Hau Ng   +3 more
wiley   +1 more source

Counterexample for the 2-approximation of finding partitions of rectilinear polygons with minimum stabbing number [PDF]

arXiv, 2015
This paper presents a counterexample for the approximation algorithm proposed by Durocher and Mehrabi [1] for the general problem of finding a rectangular partition of a rectilinear polygon with minimum stabbing number.
arxiv