11,649 research outputs found
Hierarchical Structure Formation of Cylindrical Brush Polymer-Surfactant Complexes
No full textThe complex formation of cylindrical brush polymers with poly(L-lysine) side chains (PLL) and sodium dodecyl sulfate (SDS) can induce a helical conformation of the cylindrical brush polymer in aqueous solution (Gunari, N.; Cong, Y.; Zhang, B.; Fischer, K.; Janshoff, A.; Schmidt, M. Macromol. Rapid Commun. 2008, 29, 821-825). Herein, we have systematically investigated the influence of surfactant, salt, and pH on the supramolecular structure formation. The cylindrical brush polymers and their complexes with surfactants were directly visualized by atomic force microscopy in air and in aqueous solution. The alkyl chain length (measured by the carbon number, n) of the surfactant plays a key role. While helical structures were formed with n = 10, 11, and 12, no helices were observed with n 13. Addition of salt destroys the helical structures as do pH conditions below 4 and above 6, most probably because the polymer-surfactant complexes start to disintegrate. Circular dichroism was utilized to monitor the PLL side chain conformation and clearly revealed that beta-sheet fort-nation of the side chains induces the helical conformation of the atactic main chain.German Science Foundation [SFB 625
Shakespeare and Space
No full textCo-editor of book, with Cong Cong, and author of the chapter 'London, Stratford, Coventry: Shakespearean theatre and the spaces of history
Crowd crawling
No full textThe emerging research for online social networks (OSNs) requires a huge amount of data. However, OSN sites typi- cally enforce restrictions for data crawling, such as reques t rate limiting on a per-IP basis. It becomes challenging for an individual research group to collect sufficient data by using its own network resources. In this paper, we intro- duce and motivate crowd crawling , which allows multiple re- search groups to efficiently crawl data in a collaborative way . Crowd crawling is carefully designed by addressing several practical challenges including resource diversity of diffe rent partners, strict request rate limiting from OSN providers, and data fidelity. We implemented and deployed a crowd crawling prototype on PlanetLab, and demonstrated its per- formance through evaluations. We have made the datasets crawled in our evaluation publicly available
A checklist of the cicadas (Hemiptera: Cicadidae) of Hainan Island, China, with description of a new species
No full textYang, Mingsheng, Wei, Cong (2013): A checklist of the cicadas (Hemiptera: Cicadidae) of Hainan Island, China, with description of a new species. Zootaxa 3731 (1): 113-132, DOI: 10.11646/zootaxa.3731.1.
CloudGPS: A scalable and ISP-friendly server selection scheme in cloud computing environments
No full textIn order to minimize user perceived latency while ensuring high data availability, cloud applications desire to select servers from one of the multiple data centers (i.e., server clusters) in different geographical locations, which are able to provide desired services with low latency and low cost. This paper presents CloudGPS, a new server selection scheme of the cloud computing environment that achieves high scalability and ISP-friendliness. CloudGPS proposes a configurable global performance function that allows Internet service providers (ISPs) and cloud service providers (CSPs) to leverage the cost in terms of inter-domain transit traffic and the quality of service in terms of network latency. CloudGPS bounds the overall burden to be linear with the number of end users. Moreover, compared with traditional approaches, CloudGPS significantly reduces network distance measurement cost (i.e., from O(N) to O(1) for each end user in an application using N data centers). Furthermore, CloudGPS achieves ISP-friendliness by significantly decreasing inter-domain transit traffic
Pomponia Stal 1866
No full textGenus Pomponia Stål, 1866Published as part of Yang, Mingsheng & Wei, Cong, 2013, A checklist of the cicadas (Hemiptera: Cicadidae) of Hainan Island, China, with description of a new species, pp. 113-132 in Zootaxa 3731 (1) on page 117, DOI: 10.11646/zootaxa.3731.1.5, http://zenodo.org/record/22302
A review of the cicada genus Haphsa Distant from China (Hemiptera: Cicadidae)
No full textWang, Xu, Yang, Mingsheng, Wei, Cong (2015): A review of the cicada genus Haphsa Distant from China (Hemiptera: Cicadidae). Zootaxa 3957 (4): 408-424, DOI: 10.11646/zootaxa.3957.4.
Haphsa lueta Wang, Yang & Wei 2015
No full text12. Haphsa lueta Wang, Yang & Wei, 2015 Haphsa lueta Wang, Yang & Wei, 2015: 410. Distribution. China (Hainan).Published as part of Wang, Siyue, Peng, Xiaodong & Wei, Cong, 2021, A review of the cicada genus Haphsa Distant, 1905 with the description of one new species from China (Hemiptera: Cicadidae) and a phylogenetic analysis of Haphsa and its allies, pp. 523-538 in Zootaxa 4991 (3) on page 531, DOI: 10.11646/zootaxa.4991.3.5, http://zenodo.org/record/504258
Pomelo
No full textComputing the shortest-path distances between nodes is a key problem in analyzing social graphs. Traditional methods like breadth-first search (BFS) do not scale well with graph size. Recently, a Graph Coordinate System, called Orion, has been proposed to estimate shortest-path distances in a scalable way. Orion uses a landmark-based approach, which does not take account of the shortest-path distances between non-landmark nodes in coordinate calculation. Such biased input for the coordinate system cannot characterize the graph structure well. In this paper, we propose Pomelo, which calculates the graph coordinates in a decentralized manner. Every node in Pomelo computes its shortest-path distances to both nearby neighbors and some random distant neighbors. By introducing the novel partial BFS, the computational overhead of Pomelo is tunable. Our experimental results from different representative social graphs show that Pomelo greatly outperforms Orion in estimation accuracy while maintaining the same computational overhead
Pendampingan masyarakat dalam memanfaatkan Cong-Cong untuk menciptakan kemandirian ekonomi masyarakat melalui Kelompok Tahlil Dusun Taman Desa Poteran Kecamatan Talango Kabupaten Sumenep
No full textSkripsi ini membahas tentang pendampingan masyarakat melalui anggota kelompok tahlil Dusun Taman, dengan fokus penelitian sebagai berikut: Bagaimana kondisi asset yang ada di Dusun Taman? dan Bagaimana strategi yang dilakukan anggota tahlil masjid Nur Muhammad upaya mengembangkan aset yang ada di Dusun Taman? Penelitian ini menggunakan Metode ABCD (Asset Based Community Development), metode berbasis aset. Prinsip-prinsip, strategi, tahapan dan teknik dalam penelitian pendampingan ini semua merujuk pada metode ABCD. Hasil pendampingan pemanfaatan cong-cong menunjukan bahwa terdapat perubahan baik dari kesadaran anggota tahlil dalam mengembangkan aset yang ada, guna menciptakan kemandirian para anggota tahlil yang terdiri dari penduduk tetap. Proses pendampingan pemanfaatan cong-cong juga menumbuhkan ide-ide kreatif bagi masyarakat dalam pengolahan juga pengemasan sehingga membuat cong-cong banyak diminati masyarakat sehingga masyarakat dapat melanjutkan kreativitasnya dalam memanfaatkan aset supaya aset terlestarikan secara terus menerus. Sedangkan dalam pandangan relevansi dakwah, dalam proses pendampingan yang dilakukan oleh anggota tahlil memperoleh ilmu pengetahuan, peningkatan keterampilan dan skill sebagai modal untuk berusaha mandiri dalam melangsungkan kehidupan di dunia
- …
