222 research outputs found
ReCon: Revealing and Controlling PII Leaks in Mobile Network Traffic
It is well known that apps running on mobile devices extensively track and
leak users' personally identifiable information (PII); however, these users
have little visibility into PII leaked through the network traffic generated by
their devices, and have poor control over how, when and where that traffic is
sent and handled by third parties. In this paper, we present the design,
implementation, and evaluation of ReCon: a cross-platform system that reveals
PII leaks and gives users control over them without requiring any special
privileges or custom OSes. ReCon leverages machine learning to reveal potential
PII leaks by inspecting network traffic, and provides a visualization tool to
empower users with the ability to control these leaks via blocking or
substitution of PII. We evaluate ReCon's effectiveness with measurements from
controlled experiments using leaks from the 100 most popular iOS, Android, and
Windows Phone apps, and via an IRB-approved user study with 92 participants. We
show that ReCon is accurate, efficient, and identifies a wider range of PII
than previous approaches.Comment: Please use MobiSys version when referencing this work:
http://dl.acm.org/citation.cfm?id=2906392. 18 pages, recon.meddle.mob
Synthesis of Ξ±- and Ξ²-Carbolines by a Metalation/Negishi Cross- Coupling/SNAr Reaction Sequence
A methodology for the synthesis of Ξ±- and Ξ²-carbolines from fluoropyridines and 2-haloanilines is reported. This procedure consists of a four-step directed ortho-lithiation, zincation, Negishi cross-coupling, and intramolecular nucleophilic aromatic substitution, providing access to a diverse set of functionalized carbolines. While the procedure is applicable to batch conditions, the generation of arylzinc intermediates in continuous flow has been demonstrated
ΠΡΡΡΡΠΎΠ΄Π΅ΠΉΡΡΠ²ΡΡΡΠ°Ρ ΡΠΈΡΡΠ΅ΠΌΠ° ΡΡΠ°Π±ΠΈΠ»ΠΈΠ·Π°ΡΠΈΠΈ ΠΏΠ΅ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ
Π Π°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΡΠΈΡΡΠ΅ΠΌΠ° ΡΡΠ°Π±ΠΈΠ»ΠΈΠ·Π°ΡΠΈΠΈ ΠΏΠ΅ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΌΠ°Π³Π½ΠΈΡΠ½ΠΎ-ΠΏΠΎΠ»ΡΠΏΡΠΎΠ²ΠΎΠ΄Π½ΠΈΠΊΠΎΠ²ΠΎΠ³ΠΎ ΡΠ΅Π³ΡΠ»ΡΡΠΎΡΠ° Π±Π΅Π· ΠΏΠΎΠ΄ΠΌΠ°Π³Π½ΠΈΡΠΈΠ²Π°Π½ΠΈΡ ΠΏΠΎΡΡΠΎΡΠ½Π½ΡΠΌ ΡΠΎΠΊΠΎΠΌ ΠΈ Π±ΡΡΡΡΠΎΠ΄Π΅ΠΉΡΡΠ²ΡΡΡΠ΅ΠΉ ΠΎΠ±ΡΠ°ΡΠ½ΠΎΠΉ ΡΠ²ΡΠ·ΠΈ. ΠΠΎ ΠΎΠΏΠΈΡΠ°Π½Π½ΠΎΠΌΡ ΠΏΡΠΈΠ½ΡΠΈΠΏΡ ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ ΠΏΠΎΡΡΡΠΎΠ΅Π½Ρ Π±ΡΡΡΡΠΎΠ΄Π΅ΠΉΡΡΠ²ΡΡΡΠΈΠ΅ ΠΎΠ΄Π½ΠΎΡΠ°Π·Π½ΡΠ΅ ΠΈ ΡΡΠ΅Ρ
ΡΠ°Π·Π½ΡΠ΅ ΡΡΠ°Π±ΠΈΠ»ΠΈΠ·Π°ΡΠΎΡΡ Π½Π°ΠΏΡΡΠΆΠ΅Π½ΠΈΡ Π½Π° Π²ΡΡΡΠ΅ΡΠ½ΠΎ-ΠΏΠ°ΡΠ°Π»Π»Π΅Π»ΡΠ½ΡΡ
ΡΠΏΡΠ°Π²Π»ΡΠ΅ΠΌΡΡ
Π²Π΅Π½ΡΠΈΠ»ΡΡ
ΠΏΡΠΈ ΠΈΡ
Π΅ΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΠΈΠ»ΠΈ ΠΏΡΠΈΠ½ΡΠ΄ΠΈΡΠ΅Π»ΡΠ½ΠΎΠΉ ΠΊΠΎΠΌΠΌΡΡΠ°ΡΠΈΠΈ
Singing Actors and Dancing Singers
This article looks at two recent and widely recognized productions of Henry Purcell's Dido and Aeneas (by choreographer Sasha Waltz, Berlin 2005, and theatre director Sebastian NΓΌbling, Basel 2006) and discusses three main aspects: 1. Genre: coming from a Tanztheater (Waltz) and a Sprechtheater (NΓΌbling) background, each director renegotiates conventions of the operatic genre and consciously evades expectations in pursuit of a new and challenging experience for both the performers and their audience. 2. Physicality: both productions place the performers' bodies at the forefront of the mise-en-scne they remap the singing, dancing, acting body by questioning conventions and expectations commonly found in the production and reception process. 3. Adaptation: both productions take unconventional liberties by adapting in a domain where notions of Werktreue (fidelity to the original work or score) still reign. Adopting ideas from Nicholas Cook and Mikhail Bakhtin, I will argue that the conceptual, musical and theatrical implications of both productions indicate a renegotiation of the social and performative relevance of operatic performance
Continuous-Flow Synthesis of Biaryls by Negishi Cross-Coupling of Fluoro- and Trifluoromethyl-Substituted (Hetero)arenes
A continuous-flow method for the regioselective arylation of fluoroarenes and fluoropyridines has been developed. The telescoped procedure reported here consists of a three-step metalation, zincation, and Negishi cross-coupling sequence, providing efficient access to a variety of functionalized 2-fluorobiaryl products. Precise temperature control of the metalation step, made possible by continuous-flow technology, allowed for the efficient preparation of the arylated products in high yields and short residence times. Additionally, several examples of the regioselective arylation of benzotrifluoride derivatives are also provided
Synthesis of Benzofuropyridines and Dibenzofurans by a Metalation/Negishi Cross-Coupling/SNAr Reaction Sequence
An efficient methodology for the synthesis of benzofuropyridines and dibenzofurans from fluoropyridines or fluoroarenes and 2-bromophenyl acetates is reported. This streamlined one-pot procedure consists of a four-step directed ortho-lithiation, zincation, Negishi cross-coupling, and intramolecular nucleophilic aromatic substitution, allowing for the facile assembly of a diverse set of fused benzofuro heterocycles
Short Enantioselective Total Synthesis of Tatanan A and 3-epi-Tatanan A Using Assembly-Line Synthesis
Short and highly stereoselective total syntheses of the sesquilignan natural product tatanan A and its C3 epimer are described. An assembly-line synthesis approach, using iterative lithiationβborylation reactions, was applied to install the three contiguous stereocenters with high enantio- and diastereoselectivity. One of the stereocenters was installed using a configurationally labile lithiated primary benzyl benzoate, resulting in high levels of substrate-controlled (undesired) diastereoselectivity. However, reversal of selectivity was achieved by using a novel diastereoselective Matteson homologation. Stereospecific alkynylation of a hindered secondary benzylic boronic ester enabled completion of the synthesis in a total of eight steps
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