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This paper introduces xDCI, a Data Science Cyber-infrastructure to support research in a number of scientific domains including genomics, environmental science, biomedical and health science, and social science. xDCI leverages open-source software packages such as the integrated Rule Oriented Data System and the CyVerse Discovery Environment to address significant challenges in data storage, sharing,...
Increased interest in security has resulted in greater demand for automated test systems to comply with security standards. Automated test systems have traditionally been operated in isolated environments because of their unique characteristics. However, changes in United States defense acquisition regulations require that defense contractors bring these test systems into compliance with National...
In this paper, we have presented a design of hybrid arithmetic logic unit (ALU) in Double precision format (DPF) according to the IEEE-754 standard. In this we have designed an ALU which consists of the two different architectures. First architecture is semi-floating point unit (Semi-FPU) and the second architecture is floating point unit (FPU). Semi-FPU takes a 32-bit integer input and produces an...
Chaos-based coded modulation (CCM) systems have been shown to be competitive against important wireless channels impairments, like fading. Nonetheless, these systems have not been tested yet in a real-world scenario, and their performance has only been explored using theoretical and numerical bounds, and validated by simulation. In this proposal, we take advantage of the availability of Software-Defined...
A data center is divided into three basic subsystems: information technology (IT), power, and cooling. Cooling plays an important role related to data center availability, and a failure in this subsystem may cause an interruption of services. Generally, a redundant cooling subsystem is implemented based on replacing the failed component by the standby one. However, it also can be based on a rotation...
Randomness is crucial to enabling secure and robust communications. Ideally one should harness high entropy physical processes, but this is difficult so pseudorandomness is usually substituted for randomness. We introduce improved complexity randomness tests and use them to judge three pseudorandom bit generators; the AES block cipher (standard, strongly believed to be secure), the Dragon stream cipher...
This paper contains the first considerations of a computer scientist approaching the digital forensic. After some years of consultancies for both judges and parties I developed some thoughts that probably are worthwhile to share.
Nowadays, one standard therapy for advanced heart failure is the implantation of left ventricular assist devices (LVAD). The LVAD is a mechanical pump, which supports the heart to pump blood to the rest of the body. However, there are serious complications including pump thrombosis. Pump thrombosis is a formation of blood clot inside the LVAD pump, which can result in pump stop and worst case leads...
Avionics systems, along with their internal hardware and software components interfaces, must be well defined and specified (e.g., unambiguous, complete, verifiable, consistent, and traceable specification). Such a specification is usually written in the form of an Interface Control Document (ICD), and represents the cornerstone of the avionics system integration activities. However, there is no commonly...
The four-part harmonization problem is a well known problem that has been studied in the last three centuries by music scholars. The goal is to build up three different voices, melodies, based on a previously provided one, being it a soprano melody or a bass instead, so that a complete soprano, alto, tenor and bass (SATB) score is completed.
Quantum computers could efficiently solve problems that are intractable by today's computers, thus offering the possibility to radically change entire industries and revolutionize our lives. A quantum computer comprises a quantum processor operating at cryogenic temperature and an electronic interface for its control, which is currently implemented at room temperature for the few qubits available...
Hash table is one of the most fundamental and critical data structures for membership query and maintenance. However, the performance of a standard hash table degrades greatly when the hash collision is large due to high load factor or unpredictable dynamic membership updates, especially per-packet updates in network processing. In this paper, we shape a hash table from the conventional slim-and-tall...
Internet of Things (IoT) connect different types of devices to control different things or simply read data from then, such as room temperature, location, pressure and others, in a variety of application domains using the World Wide Web. This is a challenge for technology and Information Security (IS). Therefore, this paper surveys advances in IoT-based with an eye towards security, where discusses...
We compare the performance of pipelined and s-step GMRES, respectively referred to as l-GMRES and s-GMRES, on distributed multicore CPUs. Compared to standard GMRES, s-GMRES requires fewer all-reduces, while l-GMRES overlaps the all-reduces with computation. To combine the best features of two algorithms, we propose another variant, (l, t)-GMRES, that not only does fewer global all-reduces than standard...
This paper considers a discrete-time modulus consensus model in which the interaction among a group of agents is described by a time-dependent, complex-valued, weighted digraph. It is shown that for any sequence of repeatedly jointly strongly connected digraphs, without any assumption on the structure of the complex-valued weights, the system asymptotically reaches modulus consensus. Sufficient conditions...
Since NSA announced the plans for transitioning to the algorithms which are resistant to attacks by the potential quantum computers, the interest of implementation of post-quantum cryptography (PQC) on various devices has emerged. Including widely used Java Card, memory-constrained smart cards need the efficient implementation of encryption schemes to resist quantum-computing attacks. Meanwhile, lattice-based...
In this paper, we will describe a statistical study of data analyzed by SPSS software. The aim of our study is to show the importance of sharing emotional states between learners during online communication, which helps to create an adequate environment and a positive cognitive exchange between the teammates. Our study is based on three stages. The first, discussed the satisfaction of learners with...
In this paper, we consider the problem of enhancing the filtering capacity of single standard beamformers for real base-band signals. Unfortunately, the standard smart arrays are not able to effectively minimize the effects of the complex noise in the array. In order to solve this problem, we analyze a parallel adaptive beamforming system based on complex nonlinear adaptive filters. In this design,...
A method for Peak-to-Average Power Ratio (PAPR) reduction in an OFDM system is presented using clipping based on the statistics of a large number of OFDM symbols. The clipping technique uses scaled values of standard deviations of real and imaginary parts of complex discrete samples of OFDM symbols. The trade-off between PAPR and BER for this clipping technique is examined, using extensive numerical...
Memristor characteristics like high speed, low power, and passive memory retention make it suitable for application in several fields. Neuromorphic systems, digital and analog circuits, or simply a memory unit, are some of these applications. A memristor exhibits different properties, which allow each field of application to take the desired advantages of this device. Memristor-based “Implication”,...
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