Application of the partitioning method to specific Toeplitz matrices

We propose an adaptation of the partitioning method for determination of theMoore–Penrose inverse of a matrix augmented by a block-column matrix. A simplified implementation of the partitioning method on specific Toeplitz matrices is obtained. The idea for observing this type of Toeplitz matrices lies in the fact that they appear in the linear motion blur models in which blurring matrices (representing the convolution kernels) are known in advance. The advantage of the introduced method is a significant reduction in the computational time required to calculate the Moore–Penrose inverse of specific Toeplitz matrices of an arbitrary size. The method is implemented in MATLAB, and illustrative examples are presented

Application of the pseudoinverse computation in reconstruction of blurred images

We present a direct method for removing uniform linear motion blur from images. The method is based on a straightforward construction of the Moore-Penrose inverse of the blurring matrix for a given mathematical model. The computational load of the method is decreased significantly with respect to other competitive methods, while the resolution of the restored images remains at a very high level. The method is implemented in the programming package MATLAB and respective numerical examples are presented

Application of the partitioning method to specific Toeplitz matrices

We propose an adaptation of the partitioning method for determination of theMoore–Penrose inverse of a matrix augmented by a block-column matrix. A simplified implementation of the partitioning method on specific Toeplitz matrices is obtained. The idea for observing this type of Toeplitz matrices lies in the fact that they appear in the linear motion blur models in which blurring matrices (representing the convolution kernels) are known in advance. The advantage of the introduced method is a significant reduction in the computational time required to calculate the Moore–Penrose inverse of specific Toeplitz matrices of an arbitrary size. The method is implemented in MATLAB, and illustrative examples are presented

TUMORS OF THE KIDNEY AND URINARY TRACT IN ENDEMIC AREA OF VILLAGE BRESTOVAC

During the twenty- five-year period the incidence of urothelial tumors was followed in the endemic village Brestovac. Thirty patients (3 of which with confirmed endemic nephropathy and 15 persons with suspected nephropathy) were investigated. Our retrograde study showed that there is a relationship between endemic nephropathy and urothelial cancer, and this association persisted with marked tendency to rise. Tumors were more common among males, aged from 50 to 70 years, with upper urinary tract urothelial cancer, papillary or trancellular forms, predominantly. Clinical feature showed classic triad of hematuria, flank pain and, rarely, flank mass, accompanied with non-specific symptomatology. Normal renal function was observed in 25 patients, but chronic renal failure was proven in five. Ten patients were treated by surgery, while 20 patients were treated by conservative therapy. There are no marked risk factors

Improving the confectionery industry supply chain through second party audits

Purpose - The purpose of this paper is to evaluate benefits and constraints of improving suppliers' quality and food safety systems through second party audits. Design/methodology/approach - A quantitative quality and food safety audit tool was developed to perform second party audits within the confectionery industry supply chain. Nine flourmills and four food packaging producers were included in the audit program. Initial audits were performed at the beginning of the program, with follow-up audits performed after one year. Findings - Level of implementation of food safety and quality requirements were presented as scores. Flourmills improved their scores from 38.6 to 64.4 percent during the period of two years. In contrast, at the end of the second year, food packaging producers showed a lower level of improvement from 34.0 to 45.6 percent. This research confirmed that certification status does not imply high performance of a quality/food safety system. Companies experienced problems in identifying processes, setting performance indicators and objectives and implementing problem solving tools. Quality control has been identified as a dimension where most companies do not document their control methods and have no method in place to verify consistency in their results. Control of risks in terms of Hazard Analysis Critical Control Point implementation was identified as the main food safety constraint. Research limitations/implications - Limitations of the research stein from the use of results from one part of the confectionery supply chain, from auditing a limited number of companies and from excluding the technological level of the audited companies, Practical implications This study provides a valuable insight for quality and/or food safety assurance managers on benefits of using second party audits as a supply chain developing tool. Originality/value - The, findings of this study are worthy, as second party audits are identified as slow but effective tools in directing suppliers toward improvements