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In noisy environments, the influence of music genre, type of noise and volume of music was evaluated using headphones and a portable music player. This report shows that noise in a station concourse is more highly evaluated than pink noise under the condition of the same S/N ratio, and classical music was more highly acclaimed than other music genres. Furthermore a smaller volume of music was better...
Nowadays, many services in the internet including Email, search engine, social networking are provided with free of charge due to enormous growth of web users. With the expansion of Web services, denial of service (DoS) attacks by malicious automated programs (e.g., web bots) is becoming a serious problem of web service accounts. A HIP, or Human Interactive Proofs, is a human authentication mechanism...
RFI (Radio Frequency Interference) signals are a threat for GNSS-R (Global Navigation Satellite Systems — Reflectometry) due to the very low power of the navigation signals. Interference signals coming from computers or high-speed buses may affect GNSS-R measurements introducing a bias or even corrupting them completely. These RFI may be in-band or near-band and can desensitize GNSS and GNSS-R receivers...
Our scientific community faces a sort of paradox. A large bulk of work has been done on data-oriented techniques devised to improve peer reputation and knowledge extraction from data, so as to improve trustworthiness of digital services involving coordination and cooperation among heterogeneous peers. But, perhaps surprisingly, to the best of our knowledge, such techniques have rarely been applied...
The diabetes is a disease, that in the year of 2013, affects 382 million people around the world, half of that group doesn't even know they're affected. At Medicine is known that there is relation between the type II of this disease and the hypertrophy of intestinal mucosa, but it isn't exactly known what binds them. In the present paper it is stated the process of villus segmentation — being the...
With the quick development of computer, microelectronics technique and network technique, the acceleration sensor has been widely applied. This design is to check and analyze the railway vibration. Moreover, the theory is based on the relation of acceleration and vibration. The ARM-V7 structure STM32103ZET6 is used to drive ADXL345. The microprocessor reads 3 axes acceleration values of XYZ from the...
We present a heuristic for designing vector non-linear network codes for non-multicast networks, which we call quasi-linear network codes. The method presented has two phases: finding an approximate linear network code over the reals, and then quantizing it to a vector non-linear network code using a fixed-point representation. Apart from describing the method, we draw some links between some network...
Accurate detection of voids in solder bumps on ball grid arrays (BGAs) is important for improving device quality. Radiographic imaging is commonly used to inspect BGA packages incorporate into LSI circuits. In the case of conventional method, imaging is normally done four times, and the images obtained are averaged to reduce noises. We have developed a nonnegative matrix factorization method for detecting...
Multidimensional stochastic optimization plays an important role in analysis and control of many technical systems. To solve the challenging problems of multidimensional optimization, it was suggested to use the randomized algorithms of stochastic approximation with perturbed input which have simple forms and provide consistent estimates of the unknown parameters for observations under “almost arbitrary”...
Among the various techniques used for the detection of gaze direction, the procedure based on determining pupil or iris position using video camera connected to a computer deserves special attention. Gaze follows the movement of an item — “a target point” on the PC screen, the video camera captures the images of the eye and the PC determines the gaze position; this appears as “a map” on which the...
Detecting dependencies among network services has been well-studied in previous research. These attempts at service dependency detection fall into two classes: active and passive approaches. While passive approaches suffer from high false positives, active approaches suffer from applicability problems. In this paper, we design a new application-independent active approach for detecting dependencies...
Intrinsic to “big data” processing workloads (e.g., iterative MapReduce, Pregel, etc.) are cyclical resource utilization patterns that are highly synchronized across different resource types as well as the workers in a cluster. In Infrastructure as a Service settings, cloud providers do not exploit this characteristic to better manage VMs because they view VMs as “black boxes.” We present TideWatch,...
In recent works it has been recognized that alpha stable distributions are convenient characterizations of some noise properties in the power line. They naturally include in their formulation both background noise and impulsive components. The intended applications of this modeling approach are twofold. First, it allows to better understand the statistical properties of the noise. Second, it allows...
In this paper we propose a neural net based characters recognition scheme for Bangla printed text books. There are a lot of scientific literature, novels, magazines and books etc that are written in Bangla language. More than 400 million people use Bangla language. Most of the library and educational institutions want to keep copy of the books in a digital format. For storing those books in digital...
In this paper, the method of stator current and noise combination is introduced for inter-turn short-circuit fault recognition in permanent magnet synchronouse motor. The detection and diagnosis system consists of sensors, USB5935 data acquisiton card USB5935 and a computer with LabVIEW installed. The frequency pattern of stator current is extracted from the monitored stator current and the amplitude...
CAPTCHA is a means to improve to elevate the safety of web-site. Because many web-sites use English or number characters CAPTCHA and only adopt straightforward deformation, they're lack of unfailing safety. Therefore, a improved multi-deformation Chinese ideograph CAPTCHA is designed and implemented in this paper. Experiments have proved that it's safer and also easy for using.
Estimating an image M* ∈ ℝ+m1×m2 from its linear measurements under Poisson noise is an important problem arises from applications such as optical imaging, nuclear medicine and x-ray imaging [1]. When the image M* has a low-rank structure, we can use a small number of linear measurements to recover M*, also known as low-rank matrix recovery. This is related to compressed sensing, where the goal is...
This communication deals with the explicit scheme of robust self-tuning regulation of a class of stochastic systems, which can be described by the input-output Auto-Regressive Auto-Regressive Moving Average with exogenous (ARARMAX) mathematical model with unknown and time-varying parameters in presence of unmodelled dynamics. This explicit regulation scheme is based on the proposed modified filtering...
Quartz wafer inevitably produces various physical defects in the production process. This paper focuses on the quartz wafer dirt defects, and proposes a way for image processing on the quartz wafer by using of computer vision library OpenCV. The proposed method is to find contours of the processed images to judge whether there is dirt or not. Experiments show that this method can well detect the dirt...
Mental stress has been an issue in modern society. Several studies have investigated the detection of mental stress using physiological indices. However, measurement of these indices would itself impart a certain level of stress to subjects. The temporal dynamics of key typing are called “keystroke dynamics”. Keystroke dynamics show variations with psychological subtlety. The objective of this study...
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