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  • Author: Slobodan Petrović x
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Approximate Search for Big Data with Applications in Information Security – A Survey / Aproksimativne Pretrage U Velikim Skupovima Podataka Sa Primenama U Bezbednosti Informacionih Sistema - Pregled

Abstract

This paper is a survey of approximate search techniques in very large data sets (so-called Big Data). After a short introduction, some techniques for speeding up approximate search in such data sets based on exploitation of inherent bit-parallelism in computers are described. It then reviews the applications in search related to information security problems (digital forensics, malware detection, intrusion detection) are reviewed. Finally, the need for constraints in approximate search regarding the number of so-called elementary edit operations and the run lengths of particular elementary edit operations is explained and the status of on-going research on efficient implementation of approximate search algorithms with various constraints is given.

Open access
Translation, Cultural Adjustment and Evaluation of Reliability and Validity of “Quality of Life Enjoyment and Satisfaction Questionnaire – Short Form” for Patients with Schizophrenia

Summary

The Quality of Life Enjoyment and Satisfaction Questionnaire – Short Form is the most often used scale for measuring the quality of life of patients with psychiatric diseases. The aim of this research was to analyze the possibilities for measuring the quality of life in clinical conditions on the sample of patients with schizophrenia by using this scale. The study was conducted on the group including 153 patients with schizophrenia at the Institution for Accommodation of Adults “Male Pčelice”, Kragujevac. The study was observational and cross-sectional. The reliability of questionnaire was examined by using Cronbach’s alpha. The two tests of factor analysis adequacy were used, Spherical Bartlett’s Test and Keiser-Meyer-Olkin test (sampling adequacy). Validation was performed by calculating the correlation (validation by criteria). The Quality of Life Enjoyment and Satisfaction Questionnaire – Short Form was reliable (Cronbach’s alpha coefficient was 0.730) and valid. According to Catell criterion two domains were applied. This two-component solution explained the total of 37.80% variance, whereby the contribution of the first domain was 27.1% and the second 10.7%. The Quality of Life Enjoyment and Satisfaction Questionnaire – Short Form is suitable for everyday clinical evaluation of the patients with schizophrenia.

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Congenital Primary Pachydermoperiostosis and Striate Palmoplantar Keratoderma - a Case Report

Abstract

The authors present a rare case of congenital pachydermoperiostosis associated with striate palmoplantar keratoderma in a 55-year-old female. Pachydermoperiostosis (PDP) is a heterogeneous syndrome characterized by hypertrophic changes involving predominantly the skin and bones of the extremities: pachydermia, clubbing of the fingers and toes, and hypertrophic osteoarthropathy. Primary pachydermoperiostosis (Touraine-Solente-Gole syndrome) (PPDP) or primary hypertrophic osteoarthropathy (PHO) is a rare congenital disorder and is one of two types of hypertrophic osteoarthropathy. In addition to the three main criteria, which are confirmed clinically, histologically, and by X-ray, there may be other additional clinical features. Hyperhidrosis of the hands and feet may be troublesome. The skin of the face, forehead and scalp becomes grossly thickened and thrown into folds. The folding of the scalp produces a form of cutis verticis gyrata. Additional clinical features include hypohidrosis, seborrhea, sebaceous gland hyperplasia and folliculitis, carpal and tarsal tunnel syndrome, chronic leg ulcers and calcification in the Achilles tendon. Our patient presented with most of these additional clinical features, such as acro-osteolysis of the fingers and toes, which generally occurs occasionally. In regard to palmoplantar keratoderma, we have not found reports of its association with PPDP in the available literature.

Unlike PPDP, secondary pachydermoperiostosis (secondary hypertrophic osteoarthropathy -SHO) occurs in association with severe pulmonary disease such as bronchiectasis, abscess, bronchial carcinoma, pleural mesothelioma, or thymic, esophageal or stomach cancer, which were all excluded in our patient.

In conclusion, this paper presents a congenital form of pachydermoperiostosis in a female also suffering from striate keratoderma. According to the available literature, this is the first case report of comorbidity between these two dermatoses.

Open access
The Influence of Antipsychotics on the Quality of Life of Patients with Schizophrenia in a Long-stay Psychiatric Facility

ABSTRACT

Introduction: Many factors concomitantly influence the quality of life of patients with schizophrenia in a long-stay psychiatric facility. Th e appropriate selection of antipsychotics and the intensity of their adverse effects exert a significant influence on the quality of life of these patients. Th e aim of this study was to identify the influence of antipsychotic-related factors on the quality of life of patients with schizophrenia.

Methods: Th e study included 102 beneficiaries at the Institute for Accommodation of Adults “Male Pčelice” in Kragujevac. Th e patients were interviewed on in one day using the questionnaire issued by the World Health Organization. The specified data were obtained from the health files of the beneficiaries. We performed a comparison between patients receiving only atypical antipsychotics, typical antipsychotics or a combination thereof.

Results: Th e patients who were receiving only atypical antipsychotics demonstrated better physical health quality of life scores in comparison to those who received combined antipsychotics (77.14 vs. 68.57; U = 332.0; p = 0.02). A statistically significant difference in the mental health quality of life domain was observed between groups of patients receiving various antipsychotic treatments (31.96 vs. 55.27 vs. 49.46; c2 = 7.02; p = 0.03).

Conclusion: Patients in a long-stay psychiatric facility who received atypical antipsychotics demonstrated a better quality of life in comparison to those who received typical antipsychotics, possibly due to the superior safety profile of atypical antipsychotics and a greater feeling of individual contentment.

Open access
Voltage mode electronically tunable full-wave rectifier

Abstract

The paper presents a new realization of bipolar full-wave rectifier of input sinusoidal signals, employing one MO-CCCII (multiple output current controlled current conveyor), a zero-crossing detector (ZCD), and one resistor connected to fixed potential. The circuit provides the operating frequency up to 10 MHz with increased linearity and precision in processing of input voltage signal, with a very low harmonic distortion. The errors related to the signal processing and errors bound were investigated and provided in the paper. The PSpice simulations are depicted and agree well with the theoretical anticipation. The maximum power consumption of the converter is approximately 2.83 mW, at ±1.2 V supply voltages.

Open access
Cytotoxic Effects of Different Aromatic Plants Essential Oils on Oral Squamous Cell Carcinoma- an in vitro Study

Summary

Background/Aim: Current approaches in therapy of head and neck cancers are surgery, radiotherapy and chemotherapy. However, recurrence, development of multidrug resistance, side effects, and high costs of therapy are significant problems which point to the need for more efficient and less toxic drugs and interventions.

Material and Methods: Eight essential oils obtained from Thymus serpyllum, Mentha piperita, Juniperus communis, Rosmarinus officinalis, Melissa officinalis, Achillea millefolium, Zingiber officinale, and Helichrysum arenarium were tested for their anti-proliferative on oral squamous cell carcinoma (OSCC) culture and SCC-25 cell line. Cytotoxicity assays (MTT and Neutral red) were used to detect the effect of the mentioned essential oils.

Results: T. serpyllum, M. piperita, J. communis, and R. officinalis essential oils exhibited the best anti-proliferative effect, on both types of cells. M. piperita had the greatest effect on SCC-25 cell line (4,5% of viable cells) and OSCC cells (7,2% of viable cells). Overall, cytotoxicity was higher in OSCC than in SCC-25 cell line.

Conclusions: This study showed a clear anti-proliferative effect of four essential oils, in vitro making them novel potential antineoplastic agents.

Open access
LC-MS/MS Determination of Tropane Alkaloids in Maize Crop

Summary

The undemanding LC-MS/MS method was developed for the synchronized analysis of atropine and scopolamine in maize crop. The dSPE was carried out with 1% acetic acid in acetonitrile/water and a mixture of magnesium sulphate, sodium chloride and sodium citrate. The analytes were separated on a Zorbax XDB C18 column using methanol/water as the mobile phase in gradient mode. The detection was done using a tandem masss spectrometry (MS/MS) in the positive ESI. The tropane alkaloids exhibited excellent linearity in the range of 2-20 µg/kg with the LOQ of 5 µg/kg for maize. The extraction recoveries of atropine and scopolamine were 65.7 and 85.5% with the intraday RSDr 10.25 and 4.29%, respectively. The validated method was appled to real maze samples. One sample contained 18.8 µg/kg of atropine and 6.3 µg/kg of scopolamine.

Open access
The Impact of the Global Financial Crisis on World Trade

Abstract

Modern economic and financial crisis has caused a significant reduction in trade flows, for the first time since the Second World War, so it is often referred to as the trade crisis. Despite many benefits and disadvantages of liberalization as key features of modern age, the current crisis has led to a reassessment of these positions affecting the introduction of protectionist measures and the strengthening of regional ties and alliances. The question that arises is how the future trade flows will look like and whether regional integration will prevail over multilateral and liberalized trading system. The financial crisis quickly became the economic crisis that hit all sectors. The first visible effects of the crisis were reflected in a sharp fall in trade flows, and conditioned drop in demand, which led to a fall in production and employment. The first reactions of numerous countries were protectionist measures in order to protect national interests. This again aroused debate between proponents of liberalism and protectionism, where the effects and the origins of the crisis favored the latter. Economic decision makers, faced with the pressing economic problems, tried to mitigate them (at least in the short-term) turning more to regional partners, and less to the world market.

Open access
Analysis of Treatment-Related Factors Affecting Mortality in Patients with Severe Necrotizing Acute Pancreatitis

Summary

The aim of the paper was to determine the factors related to the initial therapy that may contribute to death from severe necrotizing acute pancreatitis and to analyze their clinical importance as well as possible additive effects.

A retrospective case-control study included all adult patients treated for severe necrotizing acute pancreatitis in the Clinical Center of Kragujevac, Serbia, during the five-year period (2006-2010.). The cases (n = 41) were patients who died, while the controls (n = 69) were participants who survived. In order to estimate the relationship between potential risk factors and observed outcome, crude and adjusted odds ratios (OR) with 95 % confidence intervals (CI) were calculated in logistic regression models.

Significant association with observed outcome was shown for the use of gelatin and/or hydroxyethyl starch (adjusted OR 12.555; 95 % CI 1.150-137.005), use of albumin (adjusted OR 27.973; 95 % CI 1.741-449.373), use of octreotide (adjusted OR 16.069; 95 % CI 1.072-240.821) and avoiding of enteral feeding (adjusted OR 3.933; 95 % CI 1.118-13.829), while the use of nonsteroidal anti-inflammatory drugs had protective role (adjusted OR 0.057; 95 % CI 0.004-0.805).

The risk of death in patients with predicted severe necrotizing acute pancreatitis could be reduced with avoidance of treatment with colloid solutions, albumin and octreotide, as well as with an early introduction of oral/enteral nutrition and use of nonsteroidal anti-inflammatory drugs.

Open access