Audit Games with Multiple Defender Resources

Modern organizations (e.g., hospitals, social networks, government agencies) rely heavily on audit to detect and punish insiders who inappropriately access and disclose confidential information. Recent work on audit games models the strategic interaction between an auditor with a single audit resource and auditees as a Stackelberg game, augmenting associated well-studied security games with a configurable punishment parameter. We significantly generalize this audit game model to account for multiple audit resources where each resource is restricted to audit a subset of all potential violations, thus enabling application to practical auditing scenarios. We provide an FPTAS that computes an approximately optimal solution to the resulting non-convex optimization problem. The main technical novelty is in the design and correctness proof of an optimization transformation that enables the construction of this FPTAS. In addition, we experimentally demonstrate that this transformation significantly speeds up computation of solutions for a class of audit games and security games

INTELLIGENT MECHANISM FOR ROBOCALL PREVENTION USING ARTIFICIAL INTELLIGENCE-DRIVEN INTERACTIVE QUESTION AND ANSWER TECHNIQUES

A robocall is a phone call that uses a computerized auto-dialer to deliver a pre-recorded message, as if from a robot. Robocalls are often associated with political and telemarketing phone campaigns. Some robocalls use personalized audio messages to simulate an actual personal phone call. Criminals and dishonest robocallers often alter or spoof the calling number of their outbound telephone calls in order to deceive a called party. This deception increases the chance that the called party will answer a robocall. In other cases, the spam calls may be more malicious. This proposal provides an artificial intelligence (AI)-based interactive and intelligent technique that utilizes a voicebot to detect spam calls by analyzing various answer/response patterns (or contexts) of callers in order to add such callers to a deny list without any user intervention

RFID Technology in Academic Libraries of North-East India

Men has made significant efforts to achieve or to know the unknown from the initialization of civilization. The importance of the library is growing since the use of ICT and modern technologies. Library management software helps libraries to maintain library housekeeping operation easily. In a library kind of environment, RFID has significant potential to speed up library services and streamline time-consuming operations such as check-in and check-out, sorting, stock management and inventory when compared to the barcode-based solution. RFID provides for “sightless” or no line of sight identification of items. It includes the ability to facilitate circulation, re-shelving, and theft detection, and it has several other important advantages. RFID is still a relatively new technology. So far, several libraries in North-East India have implemented RFID system, mostly for self-service and the vast majority of these libraries are positive about their RFID investment and its benefits. This paper deals with the adoption policy of RFID technology in the library and its significant use in the library for better inventory control, theft detection, quick issue-return etc. The researcher has collected data from various RFID implemented libraries to know the facilities availed and problem faced by the libraries. Lastly then researcher has tried to put some suggestion for those libraries who has not implemented RFID technology in their libraries, the researcher also mentioned some guidelines regarding RFID implementation

Unraveling and Entrapment leading to acute loss of jailed wire and its long term follow-up: case report

Jailed wire technique i.e wiring of the side branch (SB) before main vessel (MV) stenting is recommended to keep it open when the SB is deemed important ( > 2mm). Rarely, it becomes difficult to retrieve the jailed wire behind the stent and it may suffer fracture or entrapment, although exceedingly rare. It may be asymptomatic or can lead to abrupt closure of side branch resulting into periprocedural myocardial infarction. Here, we report a case of 56-old male who had undergone percutaneous coronary intervention (PCI) of proximal left anterior descending artery in 2012 during which jailed balance middle weight wire (BMW, Abott Vascular, USA) of diagonal branch got unravelled and entrapped. As patient was asymptomatic, he was conservatively managed. 6-years later, he suffered acute inferior wall myocardial infarction with complete heart block. Primary angioplasty of totally occluded right coronary artery was done with 3x38 mm Xience prime stent (Everolimus eluting stent; Abott vascular, USA). In coronary angiography of left system, left anterior descending and diagonal branches were completely patent. The fractured and retained jailed wire was still in diagonal branch with no displacement in comparison with previous coronary angiography. The patient was discharged in stable cardiac condition with appropriate follow up advise. To the best of our knowledge, this is the longest follow up of entrapped, and fractured BMW wire

Spatial Qubit Entanglement Witness for Quantum Natured Gravity

Evidencing the quantum nature of gravity through the entanglement of two masses has recently been proposed. Proposals using qubits to witness this entanglement can afford to bring two masses close enough so that the complete 1/r interaction is at play (as opposed to its second-order Taylor expansion), and micron-sized masses separated by 10-100 microns (with or without electromagnetic screening) suffice to provide a 0.01-1 Hz rate of growth of entanglement. Yet the only viable method proposed for obtaining qubit witnesses so far has been to employ spins embedded in the masses, whose correlations are used to witness the entanglement developed between masses during interferometry. This comes with the dual challenge of incorporating spin coherence-preserving methodologies into the protocol, as well as a demanding precision of control fields for the accurate completion of spin-aided (Stern-Gerlach) interferometry. Here we show that if superpositions of distinct spatially localized states of each mass can be created, whatever the means, simple position correlation measurements alone can yield a spatial qubit witness of entanglement between the masses. We find that a significant squeezing at a specific stage of the protocol is the principal new requirement (in addition to the need to maintain spatial quantum coherence) for its viabilit

Massive spatial qubits: Testing macroscopic nonclassicality and Casimir entanglement

An open challenge in physics is to expand the frontiers of the validity of quantum mechanics by evidencing nonclassicality of the center of mass state of a macroscopic object. Yet another equally important task is to evidence the essential nonclassicality of the interactions which act between macroscopic objects. Here we introduce a new tool to meet these challenges: massive spatial qubits. In particular, we show that if two distinct localized states of a mass are used as the | 0 ⟩ and | 1 ⟩ states of a qubit, then we can measure this encoded spatial qubit with a high fidelity in the σ x , σ y , and σ z bases simply by measuring its position after different duration of free evolution. This technique can be used reveal the irreducible nonclassicality of the spin and center of mass entangled state of a nanocrystal implying macrocontextuality. Further, in the context of Casimir interaction, this offers a powerful method to create and certify non-Gaussian entanglement between two neutral nano-objects. The entanglement such produced provides an empirical demonstration of the Casimir interaction being inherently quantum

Massive Spatial Qubits for Testing Macroscopic Nonclassicality and Casimir Induced Entanglement

An open challenge in physics is to expand the frontiers of the validity of quantum mechanics by evidencing nonclassicality of the centre of mass state of a macroscopic object. Yet another equally important task is to evidence the essential nonclassicality of the interactions which act between macroscopic objects. Here we introduce a new tool to meet these challenges: massive spatial qubits. In particular, we show that if two distinct localized states of a mass are used as the $|0\rangle$ and $|1\rangle$ states of a qubit, then we can measure this encoded spatial qubit with a high fidelity in the $\sigma_x, \sigma_y$ and $\sigma_z$ bases simply by measuring its position after different durations of free evolution. We show how this technique can be used to reveal an irreducible nonclassicality through a Bell-inequality violation arising from the entanglement of the centre of mass of a nano-crystal with its spin in a Stern-Gerlach setup. Secondly, we show how our methodology, in conjuction with the Casimir interaction, offers a powerful method to create and certify non-Gaussian entanglement between two neutral nano-objects. Fundamentally, the generation of such an entanglement provides an empirical means for demonstrating an inherent quantumness of the Casimir interaction.Comment: 22 pages, 3 Figure

“Vieussens ring”- an unusual form of inter-coronary collateral from conus artery to diagonal artery

In patients with critical stenosis or total occlusion of either the left anterior descending artery or right coronary artery, the conus branch of right coronary artery sometimes serves as a major source of inter-coronary collateral. These collateral channels form the Vieussens ring. Here we report a case of a 74-year-old diabetic and hypertensive male whose angiogram revealed normal appearing left main, discrete lesion with critical stenosis of proximal left circumflex (LCx), left anterior descending artery (LAD) revealing diffuse disease of mid segment with critical stenosis and dissection, and chronic total occlusion of right coronary artery. However, diagonal branch could not be visualized. The large and tortuous conal branch was filling the large diagonal branch of LAD. In our case, Vieussens ring was serving as collateral to diagonal branch instead of LAD. It has both diagnostic, as well as therapeutic implication as it helps surgeon to avoid any inadvertent damage to the conus artery especially if surgery involves manipulation of the right infundibulum. It may serve as an alternative to the retrograde route when the lesion cannot be successfully crossed using an anterograde approach for LAD recanalization